JPH11118376A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger, such as a condenser and the like for refrigerator which is provided with a floor rid, large in heat radiating area and compact. SOLUTION: A thin sheet slender belt type fin member 12, wider than the diameter of the straight tube part of a horizontally arranged meandering tubular member 11, is provided as the fin of a heat exchanger 10 and a semi-cylindrical recess, opposing to the outer peripheral surface of the straight tube part, is formed in the lengthwise direction of the fin member 12 at a fixing part between the fin member 12 and the tubular member 11 while flat sheet fins 22 are formed at both sides of the semi-cylindrical recess. A cut in piece, cut in with an interval in the lengthwise direction of the semi-cylindrical recess, is raised up toward outside in the radial direction of the semi-cylindrical recess to form a fin 24 while a straight tube unit is engaged with the semi-cylindrical recess of a second fin member 20, having the same structure as the first fin member 19, in which a raised-up fins 24 are formed, to fix the tube member 11 to the fin member 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger and, more particularly, to a fin type heat exchanger using corrugated members for fins located on the floor or back of a refrigerator or the like.

[0002]

2. Description of the Related Art In a conventional refrigerator 1, as shown in FIG. 11, a refrigerator 6 having a refrigerator room 4 and a machine room 5 is supported on an underframe 3 having wheels 2. A plate type heat exchanger (condenser) 7 shown in FIG. 12 is mounted on the underframe 3 below the refrigerator compartment 4.

[0003] As shown in FIG.
Is fixed in a meandering manner to a floor cover 9 which also serves as a heat radiator, and the floor cover 9 to which the tube member 8 is fixed is attached to a lower portion of the storage body 6.

[0004]

Since the conventional heat exchanger 7 merely fixes the meandering pipe 8 to the floor cover 9, the thickness of the heat exchanger 7 is reduced. Since the area is small and the area of the floor lid 9 is not sufficiently used for heat radiation, there are problems such as poor heat exchange performance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a compact heat exchanger having a large radiating area, a large heat radiating area, and good heat exchange performance. The purpose is to provide.

[0006]

In order to solve the above-mentioned problems of the prior art, a heat exchanger according to the present invention has a plurality of straight pipes arranged and a straight pipe is provided between adjacent ends of the straight pipes. A meandering tubular material having a planar shape having a curved tubular portion connected to the tubular portion in a lateral direction, and fins provided on a surface of each straight tubular portion of the meandering tubular material in a direction substantially orthogonal to the axial direction. Wherein the meandering tubular material is constituted by at least two-stage inner and outer units, and the fins of the inner unit have a thin and long strip shape wider than the diameter of the tubular material. A semi-cylindrical recess having a shape corresponding to the outer peripheral surface of the tubing member is formed at a fixed portion between the fin member and the straight pipe portion of the tubing member. Formed in the longitudinal direction of the semi-cylindrical Both sides of the recess and plate fins,
Cut-in pieces cut at intervals in the longitudinal direction of the semi-cylindrical recess are raised almost radially outward of the semi-cylindrical recess to form rising fins, and the first fin on which the rising fin is formed The straight pipe portion of the tube is fitted into the semi-cylindrical recess of the first fin member of the member and the second fin member, and the semi-cylindrical recess of the second fin member is fitted into the first fin member. On the opposite side to the straight pipe part of the pipe material,
The fin member formed with the rising fin and the flat fin is fixed to the straight pipe portion of the pipe material, and the fin of the outer unit has a shape corresponding to the outer peripheral surface of the pipe material at a fixing portion with the pipe material and has a length corresponding to the length of the straight pipe portion. A corrugated plate-like member in which a plurality of rows of semi-cylindrical concave grooves having a corresponding length are formed, and a second fin member similar to the second fin member, wherein the corrugated plate-like member has a semi-cylindrical shape. The concave groove is fitted from the outside of the straight pipe portion of the tubular material, and the semi-cylindrical concave portion of the second fin member is fitted into the straight tubular portion of the tubular material inside the semi-cylindrical concave groove of the corrugated member. The second fin member on which the rising fins and the flat fins are formed, and a corrugated member are fixed to a pipe material, and the corrugated member is configured as a floor cover.

In order to solve the above-mentioned problems, a heat exchanger according to the present invention has a plurality of straight pipes arranged in a row, and is disposed between adjacent ends of the straight pipes in a lateral direction with respect to the straight pipes. A meandering tubular material having a planar shape having a connected curved tube portion, and fins provided on a surface of each straight pipe portion of the meandering tubular material in a direction substantially orthogonal to the axial direction, and a fluid flows therethrough. In the heat exchanger, the fins are wider than the diameter of the tube material, have a thin and long strip shape, and are formed of an inner fin member and an outer corrugated member with respect to the inside and outside directions. A semi-cylindrical recess having a shape corresponding to the outer peripheral surface of the fin member is formed in the longitudinal direction of the fin member, and both sides of the semi-cylindrical recess are formed as flat fins, and cuts are formed at intervals in the longitudinal direction of the semi-cylindrical recess. Piece almost radially outside of semi-cylindrical recess A structure forming the raised fins start raising Chi, a semi-cylindrical recess of the fin member which the start-up fin is formed, fitted from inside the straight tube portion of the tube,
The corrugated plate-like member has a configuration in which a plurality of rows of semi-cylindrical concave grooves having a shape corresponding to the outer peripheral surface of the straight tube portion of the tube material and a length corresponding to the length of the straight tube portion are formed. The fin member and the corrugated member were fixed to the tube member by fitting the semi-cylindrical concave groove of the member into the straight tube portion of the tube member from the outside, and the corrugated member was configured as a cover plate. It is characterized by the following.

[0008] The corrugated plate-like member may be divided into each straight pipe portion of the pipe material.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, one embodiment of a heat exchanger of the present invention applied to a refrigerator will be described with reference to FIGS.
0 will be described.

FIG. 1 is a plan view showing the entire heat exchanger (condenser) for a refrigerator, FIG. 2 is a partially enlarged view of FIG.
FIG. 3 is a partial cross-sectional front view taken along the line AA of FIG. 2. The heat exchanger (condenser) 10 includes a meandering tube material 11, fin members 12 forming fins, corrugated plate members 13, and connectors. 14 and a connecting plate 15. The refrigerant as the first fluid is sent from the pipe inlet Q to the pipe outlet R by a compressor (not shown) inside the pipe 11, and the air as the second fluid is shown in FIG. 1, FIG. 2 and FIG. As shown by an arrow S, the fluid flows in a horizontal direction perpendicular to the straight pipe portion of the meandering tubular material 11 and exchanges heat with the refrigerant via the fin members 12.

[0011] The pipe 11 is made of a plurality of steel pipes, for example,
It is composed of two units, upper and lower, that is, inner and outer. Each unit is formed so as to meander in a planar form by connecting the straight pipe sections 16 horizontally and in parallel and connecting them via a curved pipe section 17. . Further, a fin member 12 and / or a corrugated member 13 to be described later are fixed to the straight pipe portion 16 of the pipe material 11. The straight pipe portions 16 of the respective tube material units are connected in parallel at a distance by fitting the connecting plates 15 shown in FIG. 4 to both ends. Here, the connecting plate 15 is formed by forming the concave portion 18 to be the mounting portion of the tube material 11 by shifting the pitch P by 1/2 along both edges, and for example, is made of a steel plate and functions as a wind guide plate.
The ends of the two tube units are connected to each other by a connector 14 described later.

As shown in FIGS. 3 and 6, the fin member 12 has a first fin member 19 and a second fin member 20 opposed to each other in the vertical direction, that is, inward and outward directions. The first fin member 19 and the second fin member 20 are made of, for example, an iron plate. Here, the first fin member 19 and the second fin member 20 are connected to the tube material 11.
Is thinner and narrower than the diameter of the thin plate, and has a length substantially corresponding to the length of the straight pipe portion 16 of the tube material 11. In the center of the width of the fin member 12, a semi-cylindrical concave portion 2 having a shape corresponding to the cylindrical peripheral surface of the tubular member 11 in the longitudinal direction.
1 are formed, and flat fins 22 project from both sides of the semi-cylindrical concave portion 21. In the semi-cylindrical portion forming the semi-cylindrical concave portion 21, rectangular cut pieces are formed in the longitudinal direction, for example, by U-shaped cuts 23 at a pitch of 7 mm, as shown in FIGS. The cut-in pieces are raised almost radially outward from the semi-cylindrical concave portion 21 to form rising fins 24.

Here, the base edge 25 of the rising fin 24 has an arc shape corresponding to the outer diameter of the tube material 11.
The rising fins 24 are correspondingly divided (three in the present embodiment) in the width direction of the fins, as shown in FIGS. The rising fins 24 improve the contact with the airflow as shown in FIGS. 7 and 8 and improve the heat exchange of the heat exchanger 10.
The three rising fins 24 are erected so that their rising angles (bending angles) with respect to the surface of the tube material 11 are different from each other. In addition, at the portion where the flat plate fin 22 comes into contact with the tube material 11, a bent portion 26 bent along the surface of the tube material 11 is formed as shown in FIGS. Fin member 1
The contact area between 2 and the tube material 11 can be made larger.

The formation of the rising fins 24 and the bent portions 26 and the like are all automatically performed by press working, and the steps of punching, cutting, standing, bending, and the like are performed in one step. Done.

FIGS. 3 and 6 formed as described above.
The first fin member 19 shown in the upper part of FIG. 5 has its semi-cylindrical concave portion 21 fitted into the straight pipe portion 16 of the tube material 11, and the straight pipe portion 16 has the same second fin member 19 as the first fin member 19. The semi-cylindrical recess 21 of the fin member 20 is
The first fin member 19 and the second fin member 20 sandwich the straight pipe portion 16 and perform spot welding (or caulking) on the two overlapping flat plate fins 22. Alternatively, the straight pipe portion 16 and the fin member 12 are fixed to each other by spot welding the semi-cylindrical concave portion 21 and the straight pipe portion 16 directly. As shown in FIG. 6, the upper portion of the flat fin 22 on the air inflow side has an inlet portion 27 that guides the air by bending the flat fin 22 in a diagonally upward direction and opening in the air inflow direction. Is formed.

As shown in FIGS. 3 and 10, the corrugated plate 13 is a fin on the floor side, that is, an outer fin, and is made of, for example, an iron plate.
And a rectangular shape having a size corresponding to the straight pipe portion 16 of the lower tube material unit. A semi-cylindrical concave groove 28 having a shape corresponding to the cylindrical shape of the straight pipe portion 16 of the pipe material 11 is provided on the surface of the corrugated plate 13 at a position corresponding to the straight pipe portion 16 of the pipe material 11.
Are formed in parallel. And this semi-cylindrical concave groove 2
8 are flat fins 22a extending to adjacent semi-cylindrical concave grooves 28. The corrugated plate member 13 thus formed is fitted with the straight pipe portion 16 of the pipe material 11 of the lower or outer tube unit in the semi-cylindrical concave groove 28, and the second straight pipe portion 16 The semi-cylindrical concave portion 21 of the fin member 20 is fitted from the side opposite to the corrugated plate member 13, that is, from the upper side (inside), so that the corrugated plate member 13 and the second fin member 20 directly connect the tube material 11. The tube portion 16 is sandwiched and the two overlapping flat plate fins 22 and 22a are spot-welded (or caulked or the like), or the semi-cylindrical concave groove 28 of the corrugated member 13 and the straight tube portion 16, or The tube material 11, the fin member 12, and the corrugated member 13 are fixed to each other by directly spot welding the semi-cylindrical concave portion 21 of the second fin member 20 and the straight pipe portion 16.

The connector 14 connects the end portions 29 of the tube members 11 of the two tube member units in an oblique direction as shown in FIG. 3, and presses a steel plate to make a smooth curved surface for minimizing pressure loss. Is formed. Then, by changing the pitch P and the width T (FIG. 4) of the concave portion 18 for fitting the pipe 11 to the connector 14 and the connecting plate 15, the width and the thickness of the heat exchanger 10 composed of the two pipe units are adjusted. can do. The connector 14 may be formed by a U-bend connecting pipe.

Since the heat exchanger 10 is configured as described above, the first fin member 19 and the second fin member 2
The zero and corrugated member 13 and the second fin member 20 are easy to assemble and have good mass productivity, and the fin pitch is small and the heat radiation area is large (the same as in the conventional fin type heat exchanger). (1.5 times increase in specification), so that the heat exchanger becomes small. Furthermore, since the corrugated member 13 can also serve as the floor cover 30 as a lid plate, the structure of the bottom of the refrigerator is simplified, and the corrugated member 13 can also serve as a duct for flowing air to the fins. it can.

In the present embodiment, the tube 11 and the fin member 12 are made of steel, but may be made of a material having excellent heat conductivity, such as copper or aluminum. Although the heat exchange is performed by air, a liquid such as water may be used. Further, the corrugated plate member 13 is made of a single flat plate. However, a long and narrow strip-shaped plate member (the second plate member) corresponding to each straight pipe portion 16 of the pipe member 11 is used.
May be formed of the same plate material as the fin member 20), and adjacent members may be welded in the longitudinal direction. In some cases, a gap may be provided between adjacent objects.

In the above embodiment, the heat exchanger is described as being installed at the bottom of the refrigerator, but the heat exchanger of the present invention can be installed at the back of the refrigerator. In this case, the side toward the back is the outside, and the side near the refrigerator is the inside. Further, the corrugated plate-like member and a second
The semi-cylindrical concave portion and the semi-cylindrical concave groove of the fin member can change the ratio of the central angle at which the semi-cylindrical concave portion covers the tube portion. For example, when the central angle is increased until the semi-cylindrical concave portion of the second fin member covers most of the outer periphery of the straight pipe portion, the central angle of the semi-cylindrical concave groove of the corrugated member decreases, and in the extreme state, The corrugated member is simply a flat plate. The present invention includes such a case.

[0021]

As described above, according to the present invention,
A fin member is formed with a semi-cylindrical concave portion and a flat plate fin, and a rising fin is formed by raising a cut piece cut into the semi-cylindrical concave portion. Provided is a heat exchanger suitable for energy saving, having a large heat radiation area and a good heat exchange performance, since the fin member sandwiches the tube material and fixes the tube material and the fin member, so that the pitch of the rising fins can be made fine. Can be.

Since the heat exchanger can be small and compact by increasing the number of the fins to be raised, the heat exchanger can be installed alone in a place where the heat generation is not affected, such as at the bottom and the back of the bottom plate of the refrigerator. . Further, since the tube material is sandwiched between the fin members, and the flat fins and the rising fins can be formed on the fin members by one-step pressing, the productivity is excellent and the assembling is easy and the mass productivity is excellent. It can be a cost heat exchanger.

Since the corrugated plate also serves as the lid plate,
The structure of the bottom or back of the refrigerator is simple and inexpensive, and also serves as a duct for air to the fins, thereby improving heat exchange performance. In addition, installation of the heat exchanger as a single unit has effects such as easy removal during recycling.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a heat exchanger of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a partial cross-sectional front view taken along the line AA of FIG. 2;

FIG. 4 is an enlarged elevation view of a connecting plate.

FIG. 5 is an enlarged plan view of a rising fin portion.

FIG. 6 is an enlarged cross-sectional front view of a rising fin and a corrugated member.

FIG. 7 is a plan view showing a rising angle of a rising fin.

FIG. 8 is a side view as viewed from the direction B in FIG. 7;

FIG. 9 is an enlarged cross-sectional view of a portion where the rising fin is fixed to the pipe.

FIG. 10 is a perspective view of the heat exchanger to which the corrugated member is attached, as viewed from below.

FIG. 11 is an explanatory view of a bottom portion of a conventional refrigerator.

FIG. 12 is a perspective view of a conventional plate heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat exchanger 11 Tube material 12 Fin member 13 Corrugated member 14 Connector 15 Connecting plate 16 Straight tube portion 17 Curved tube portion 19 First fin member 20 Second fin member 22, 22a Flat plate fin 24 Start-up fin 28 Half Cylindrical recess groove 30 cover plate (floor cover)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Norio Matsumoto 2-5-5, Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor: Hideaki Kurihara Keihanmoto, Moriguchi-shi, Osaka 2-5-5, Sanyo Electric Co., Ltd. (72) Inventor Kazuaki Mabuchi 758 Konosu, Koga City, Ibaraki Prefecture

Claims (3)

[Claims] 1. A planar meandering pipe material having a plurality of straight pipe sections arranged and having a curved pipe section connected between the adjacent straight pipe sections in a lateral direction with respect to the straight pipe sections. A fin provided on a surface of each straight pipe portion of the meandering pipe in a direction substantially orthogonal to the axial direction, wherein a heat exchanger for flowing a fluid therein has at least two inner and outer stages. The fin of the inner unit is formed of a pair of first and second fin members which are wider than the diameter of the tube material, have a thin and long strip shape, and are opposed to each other in the inner and outer directions. A semi-cylindrical concave portion having a shape corresponding to the outer peripheral surface of the tube material is formed in the longitudinal direction of the fin member at a fixing portion with the straight pipe portion, and both sides of the semi-cylindrical concave portion are formed as flat fins. Cut in at longitudinal intervals The cut piece is raised almost radially outward of the semi-cylindrical recess to form a rising fin, and the first fin member and the first fin member having the rising fin formed thereon are formed.
The straight pipe portion of the pipe is fitted into the semi-cylindrical recess of the fin member, and the semi-cylindrical recess of the second fin member is inserted into the straight pipe portion of the pipe on the side opposite to the first fin member. The fin member formed with the rising fin and the flat plate fin is fixed to the straight pipe portion of the pipe material, and the fin of the outer unit is fixed to the fixed portion with the pipe material in a shape corresponding to the outer peripheral surface of the pipe material. And a second fin member similar to the second fin member, the corrugated plate member having a plurality of rows of semi-cylindrical concave grooves having a length corresponding to the length of the corrugated plate. Is fitted from the outside of the straight pipe portion of the tube material, and the semi-cylindrical recess of the second fin member is inserted into the semi-cylindrical recess groove of the corrugated plate-like member so that the straight tube portion of the tube material is straight. A second fin member fitted to the tube portion and formed with rising fins and flat fins, and a corrugated plate-like member Was fixed to the pipe member, the heat exchanger being characterized in that constitutes the wave plate member as a lid plate. 2. A meandering tubular material having a flat form in which a plurality of straight pipe portions are arranged, and a curved pipe portion is connected between adjacent ends of the straight pipe portions in a direction transverse to the straight pipe portions. A fin provided in a direction substantially orthogonal to the axial direction on the surface of each straight pipe portion of the meandering pipe material, wherein the fin is larger than the diameter of the pipe material. It has a wide and thin strip shape, and is constituted by an inner fin member and an outer corrugated member with respect to the inside and outside directions, and the fin member has a semi-cylindrical recess having a shape corresponding to the outer peripheral surface of the straight pipe portion. Formed in the longitudinal direction of the member, flat fins are formed on both sides of the semi-cylindrical recess, and cut pieces cut at intervals in the longitudinal direction of the semi-cylindrical recess are raised almost radially outward of the semi-cylindrical recess. Fins, and The semi-cylindrical concave portion of the fin member on which the rising fin is formed,
Fitted from the inside to the straight pipe portion of the pipe material, the corrugated member,
The corrugated plate-like member has a configuration in which a plurality of rows of semi-cylindrical concave grooves having a shape corresponding to the outer peripheral surface of the straight pipe portion and a length corresponding to the length of the straight pipe portion are formed. Heat exchange characterized by forming the fin member and the corrugated member into the tube material by fitting the groove into the straight tube portion of the tube material from the outside, and configuring the corrugated member as a cover plate. vessel. 3. The heat exchanger according to claim 1, wherein the corrugated plate is divided for each straight pipe portion of the pipe.