JPH08624U - Heat exchanger - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: There is a problem in safety because the tightness of the contact portion of each member of a heat exchanger is poor and combustion exhaust gas leaks. Further, there is a problem that the number of parts is large and the cost is high. A first heat exchange member (23) made of a thin steel plate, which has a heat exchange (21) and which has a flow port (26) at the bottom and a flange (25) at the periphery, is formed into a substantially dish shape. ), And a convex portion (29) having an opening (28) corresponding to the flow port (26) at the bottom, and a flange (27) corresponding to the flange (25) at the peripheral edge in a substantially dish shape. A second heat exchange member (24) made of a draw-formed thin steel plate is airtightly caulked at the edges of the circulation port (26) and the opening (28) to form a plurality of heat exchange elements (22). The plurality of heat exchange elements (22) are connected to the second heat exchange member (24) and the first heat exchange member (24).
The heat exchange members (23) and their flanges (27) and flanges
It is constructed by sequentially connecting by caulking with (25).

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a heat exchanger used in, for example, a warm air heater.

[0002]

[Prior art]

 FIG. 10 is a cross-sectional view showing a conventional heat exchanger disclosed in, for example, Japanese Utility Model Publication No. 57-41581, in which (1) is constituted by integrating a plurality of heat exchangers (2). The heat exchanger main body, (3) is a heat exchange chamber, (4) is a ventilation passage formed between the heat exchange chambers, and the heat exchange chamber (3) is a combustion exhaust gas flow path (5) (5) It communicates with 6). Reference numeral (7) is a connecting pipe communicating with the combustion chamber (not shown), and (8) is a connecting pipe communicating with an exhaust pipe (not shown).

Reference numeral (9) is a heat exchange plate constituting the heat exchange element (2), and the thin steel plate surface is oriented in one direction so that a flange portion (10) is formed at the peripheral edge of the thin steel plate such as a stainless steel plate. The plate is squeezed to form a roughly dish-shaped heat exchange surface (11) that constitutes the half body (2a) of the heat exchange element (2), and a large diameter is formed at symmetrical positions in the longitudinal direction of this heat exchange surface (11). The convex surface (12) and the small-diameter convex surface (13) are formed by drawing, respectively, and the large-diameter convex surface (12) is provided with a flow hole (14) serving as a flow path for combustion exhaust gas which is a heat medium. In addition, the end of the through hole is bent into an L shape, and a through hole (16) having a ridge (15) on the circumference is projected, and a small diameter convex surface (13) is also punched. (17) is protruding.

The conventional heat exchanger is constructed as described above, and the assembling procedure is as follows. First, the half (2a) of the heat exchange body having the flow hole (14) and the heat exchange body having the flow hole (16) are used. The half body (2a) is turned upside down so that the small-diameter convex surface (13) and the large-diameter convex surface (12) face each other, and the respective flanges (10) are butted and spot welded. The pair of heat exchange elements (2) are formed by pressure contact by means such as caulking. Next, the procedure for laminating a plurality of pairs of the heat exchange elements (2) will be explained. The small-diameter convex surfaces (13) face each other, and the large-diameter convex surfaces having the through holes (14) are formed. (12) and the large-diameter convex surface (12) having the circulation hole (16) provided with the protrusion (15) on the circumference are opposed to each other, and the protrusion (15) is fitted into the circulation hole (14). The large-diameter convex surfaces (12) (12) and the small-diameter convex surfaces (13) (13).

After sequentially assembling in this way, a fixing rod (18) composed of a bolt or the like is inserted from one end into a punching hole (11) protruding from a small-diameter convex surface (13), and the other end has a small-diameter convex surface (18). 13), the heat exchanger main body (1) is provided between the combustion chamber and the exhaust pipe by stacking and fixing a predetermined number of heat exchangers (2) with nuts, etc. The combustion exhaust gas that has flowed in from one flow path (5) of the heat exchanger body (1) enters and exits the flow holes (14) and (16) of each heat exchanger (2) and undergoes heat exchange while meandering. It flows out from the other flow path (6), reaches the exhaust pipe, and is heated by blowing air to the ventilation path (4) between the adjacent heat exchange elements (2).

[0006]

[Problems to be solved by the device]

 In the conventional heat exchanger as described above, a pair of heat exchange elements (2) formed by spot welding the half bodies (2a) of the heat exchange element (2) are provided in the flow hole (14) with the protrusions. (15) is inserted and the large-diameter convex surface (12) (12) and the small-diameter convex surface (13) (13) are brought into contact, and the heat exchanger body (1 ), The airtightness at each contact part was poor and combustion exhaust gas leaked, which was a safety issue. In addition, there is a problem that the cost becomes high because parts such as the fixing rod (18) are required.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a heat exchanger which is highly safe, has a small number of parts, and can be manufactured at low cost.

[0008]

[Means for Solving the Problems]

 A heat exchanger according to the present invention has a first heat exchange member made of a thin steel plate drawn in a plate shape having a flow port at the bottom and a flange at the periphery, and a heat exchange member at the bottom corresponding to the flow port. A second heat exchange member made of a thin steel plate that is formed into a substantially dish shape and has a convex portion having an opening and a flange portion corresponding to the flange on the periphery is provided between the circulation port and the opening. A plurality of heat exchange elements are formed by crimping airtightly at the mouth edge, and the plurality of heat exchange elements are fixed to the second heat exchange member and the first heat exchange member by airtightly caulking the flange portion and the flange. It is configured by sequentially connecting.

[0009]

[Embodiment of device]

 Regarding the operation of this invention, the opening of the second heat exchange member is swaged to the circulation port side of the first heat exchange member, and the flange of the first heat exchange member is swaged to the flange portion of the second heat exchange member. Since they are connected together tightly, the caulking part has a good sealing performance, there is no leakage of combustion exhaust gas, and safety is high, and workability is good because no separate parts are required.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a state before assembly, and FIG. FIG. 4 is a cross-sectional view showing a state in which a part is assembled, and FIG. 4 is a schematic view showing a state in which the same is incorporated in a warm air heater. In the figure, (21) is a plurality of heat exchangers (22) connected to each other. In the formed heat exchanger, the heat exchanger (22) is a first heat exchange member formed by squeezing a thin aluminum plate such as a molten aluminum plated steel plate or a stainless steel plate into a substantially dish shape as shown in FIGS. 2 and 3. (23) and the second heat exchange member (24), the first heat exchange member (23) is provided with a flange (25) at the peripheral edge thereof, and a flow port (26) is provided at the center of the bottom. Has been done.

A flange portion (27) corresponding to the flange (25) of the first heat exchange member (23) is provided on the peripheral edge of the second heat exchange member (24), and the above-mentioned flange portion (27) is provided at the center of the bottom portion. A protrusion (29) having an opening (28) corresponding to the circulation port (26) is provided. The baffle plate (30) has a plurality of holes (31) on the peripheral side. Reference numeral (32) is a pipe body connected to one end of the heat exchanger (21) and is connected to the combustor (34) via the header (33). Reference numeral (35) is a pipe body connected to the other end of the heat exchanger (21) and is connected to an exhaust stack (not shown). (36) is a flow path formed in the heat exchanger (21), (37) is a blower, and (38) is an outer box of the hot air heater in which the blower and the heat exchanger (21) are installed. Is.

In the heat exchanger configured as described above, the assembly is performed by inserting the convex portion of the second heat exchange member (24) into the flow port (26) of the first heat exchange member (23) shown in FIG. (29) Insert the end of the opening (28) and crimp it airtightly as shown in FIG. 3 to form the heat exchange element (22). Next, the heat exchanging bodies (22) are arranged so that the first heat exchanging members (23) and the second heat exchanging members (24) are alternately arranged, and the flange portion is provided with the baffle plate (30) interposed. The heat exchanger (21) is formed by airtightly caulking the (27) with the flange (25) and caulking the tube bodies (32) and (35) at both ends.

By using the heat exchanger (21) thus formed in a warm air heater, the combustion exhaust gas discharged from the combustor (34) flows from the pipe body (32) to the flow path (36). It goes inside and passes through the holes (31) and the openings (28) while meandering alternately to increase the heat exchange efficiency and is discharged from the pipe (35) through the exhaust stack. By blowing the air blown from the blower (37) around the outer periphery of the heat exchanger (21), the air is warmed and the room is heated. At this time, since the combustion exhaust gas is formed by caulking the heat exchanger (21), it does not leak to the outside and is safe.

Although the convex portion (29) is provided only on the side of the second heat exchange member (24) in the above embodiment, the first heat exchange member (23) and the first heat exchange member (23) are provided as shown in FIGS. The convex portions (29) may be provided on both of the two heat exchange members (24), which makes it possible to obtain a sufficient dimension 1 even with a material having poor drawability, and to reduce the air passage resistance. be able to. Further, as shown in FIGS. 7 and 8, the first heat exchange member (23) and the second heat exchange member (24) are provided with two or more convex portions (29), and each of them has a flow port (26). By providing the openings (28) and caulking them, the surface area can be increased and the heat exchange efficiency can be improved.

Further, as shown in FIG. 9, when the caulking portions of the flow port (26) and the opening (28) in FIG. The heat exchange efficiency can be improved. Of course, in the case of three caulking portions, they may be formed so as to differ by 60 °.

[0016]

As described above, according to the present invention, both the first heat exchanging member and the second heat exchanging member are integrally formed by drawing, and assembling can be done only by brazing without brazing or other members. Therefore, the workability is good and the manufacturing is cheap and easy, and the airtightness of the connecting points can be maintained high without any sealing treatment, and the safety and function are improved.

[Submission date] October 24, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content] [Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a heat exchanger used in, for example, a warm air heater.

[0002]

[Prior art]

 FIG. 10 is a cross-sectional view showing a conventional heat exchanger disclosed in, for example, Japanese Utility Model Publication No. 57-41581, in which (1) is constituted by integrating a plurality of heat exchangers (2). The heat exchanger main body, (3) is a heat exchange chamber, (4) is a ventilation passage formed between the heat exchange chambers, and the heat exchange chamber (3) is a combustion exhaust gas flow path (5) (5) It communicates with 6). Reference numeral (7) is a connecting pipe communicating with the combustion chamber (not shown), and (8) is a connecting pipe communicating with an exhaust pipe (not shown).

Reference numeral (9) is a heat exchange plate constituting the heat exchange element (2), and the thin steel plate surface is oriented in one direction so that a flange portion (10) is formed at the peripheral edge of the thin steel plate such as a stainless steel plate. The plate is squeezed to form a roughly dish-shaped heat exchange surface (11) that constitutes the half body (2a) of the heat exchange element (2), and a large diameter is formed at symmetrical positions in the longitudinal direction of this heat exchange surface (11). The convex surface (12) and the small-diameter convex surface (13) are formed by drawing, respectively, and the large-diameter convex surface (12) is provided with a flow hole (14) serving as a flow path for combustion exhaust gas which is a heat medium. In addition, the end of the through hole is bent into an L shape, and a through hole (16) having a ridge (15) on the circumference is projected, and a small diameter convex surface (13) is also punched. (17) is protruding.

The conventional heat exchanger is constructed as described above, and the assembling procedure is as follows. First, the half (2a) of the heat exchange body having the flow hole (14) and the heat exchange body having the flow hole (16) are used. The half body (2a) is turned upside down so that the small-diameter convex surface (13) and the large-diameter convex surface (12) face each other, and the respective flanges (10) are butted and spot welded. The pair of heat exchange elements (2) are formed by pressure contact by means such as caulking. Next, the procedure for laminating a plurality of pairs of the heat exchange elements (2) will be explained. The small-diameter convex surfaces (13) face each other, and the large-diameter convex surfaces having the through holes (14) are formed. (12) and the large-diameter convex surface (12) having the circulation hole (16) provided with the protrusion (15) on the circumference are opposed to each other, and the protrusion (15) is fitted into the circulation hole (14). The large-diameter convex surfaces (12) (12) and the small-diameter convex surfaces (13) (13).

After sequentially assembling in this way, a fixing rod (18) composed of a bolt or the like is inserted from one end into a punching hole (11) protruding from a small-diameter convex surface (13), and the other end has a small-diameter convex surface (18). 13), the heat exchanger main body (1) is provided between the combustion chamber and the exhaust pipe by stacking and fixing a predetermined number of heat exchangers (2) with nuts, etc. The combustion exhaust gas that has flowed in from one flow path (5) of the heat exchanger body (1) enters and exits the flow holes (14) and (16) of each heat exchanger (2) and undergoes heat exchange while meandering. It flows out from the other flow path (6), reaches the exhaust pipe, and is heated by blowing air to the ventilation path (4) between the adjacent heat exchange elements (2).

[0006]

[Problems to be solved by the device]

 In the conventional heat exchanger as described above, a pair of heat exchange elements (2) formed by spot welding the half bodies (2a) of the heat exchange element (2) are provided in the flow hole (14) with the protrusions. (15) is inserted and the large-diameter convex surface (12) (12) and the small-diameter convex surface (13) (13) are brought into contact, and the heat exchanger body (1 ), The airtightness at each contact part was poor and combustion exhaust gas leaked, which was a safety issue. In addition, there is a problem that the cost becomes high because parts such as the fixing rod (18) are required.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a heat exchanger which is highly safe, has a small number of parts, and can be manufactured at low cost.

[0008]

[Means for Solving the Problems]

 A heat exchanger according to the present invention has a first heat exchange member made of a thin steel plate drawn in a plate shape having a flow port at the bottom and a flange at the periphery, and a heat exchange member at the bottom corresponding to the flow port. A second heat exchange member made of a thin steel plate that is formed into a substantially dish shape and has a convex portion having an opening and a flange portion corresponding to the flange on the periphery is provided between the circulation port and the opening. A plurality of heat exchange elements are formed by crimping airtightly at the mouth edge, and the plurality of heat exchange elements are fixed to the second heat exchange member and the first heat exchange member by airtightly caulking the flange portion and the flange. It is configured by sequentially connecting.

[0009]

[Embodiment of device]

 Regarding the operation of this invention, the opening of the second heat exchange member is swaged to the circulation port side of the first heat exchange member, and the flange of the first heat exchange member is swaged to the flange portion of the second heat exchange member. Since they are connected together tightly, the caulking part has a good sealing performance, there is no leakage of combustion exhaust gas, and safety is high, and workability is good because no separate parts are required.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a state before assembly, and FIG. FIG. 4 is a cross-sectional view showing a state in which a part is assembled, and FIG. 4 is a schematic view showing a state in which the same is incorporated in a warm air heater. In the figure, (21) is a plurality of heat exchangers (22) connected to each other. In the formed heat exchanger, the heat exchanger (22) is a first heat exchange member formed by squeezing a thin aluminum plate such as a molten aluminum plated steel plate or a stainless steel plate into a substantially dish shape as shown in FIGS. 2 and 3. (23) and the second heat exchange member (24), the first heat exchange member (23) is provided with a flange (25) at the peripheral edge thereof, and a flow port (26) is provided at the center of the bottom. Has been done.

A flange portion (27) corresponding to the flange (25) of the first heat exchange member (23) is provided on the peripheral edge of the second heat exchange member (24), and the above-mentioned flange portion (27) is provided at the center of the bottom portion. A protrusion (29) having an opening (28) corresponding to the circulation port (26) is provided. The baffle plate (30) has a plurality of holes (31) on the peripheral side. Reference numeral (32) is a pipe body connected to one end of the heat exchanger (21) and is connected to the combustor (34) via the header (33). Reference numeral (35) is a pipe body connected to the other end of the heat exchanger (21) and is connected to an exhaust stack (not shown). (36) is a flow path formed in the heat exchanger (21), (37) is a blower, and (38) is an outer box of the hot air heater in which the blower and the heat exchanger (21) are installed. Is.

In the heat exchanger configured as described above, the assembly is performed by inserting the convex portion of the second heat exchange member (24) into the flow port (26) of the first heat exchange member (23) shown in FIG. (29) Insert the end of the opening (28) and crimp it airtightly as shown in FIG. 3 to form the heat exchange element (22). Next, the heat exchanging bodies (22) are arranged so that the first heat exchanging members (23) and the second heat exchanging members (24) are alternately arranged, and the flange portion is provided with the baffle plate (30) interposed. The heat exchanger (21) is formed by airtightly caulking the (27) with the flange (25) and caulking the tube bodies (32) and (35) at both ends.

By using the heat exchanger (21) thus formed in a warm air heater, the combustion exhaust gas discharged from the combustor (34) flows from the pipe body (32) to the flow path (36). It goes inside and passes through the holes (31) and the openings (28) while meandering alternately to increase the heat exchange efficiency and is discharged from the pipe (35) through the exhaust stack. By blowing the air blown from the blower (37) around the outer periphery of the heat exchanger (21), the air is warmed and the room is heated. At this time, since the combustion exhaust gas is formed by caulking the heat exchanger (21), it does not leak to the outside and is safe.

Although the convex portion (29) is provided only on the side of the second heat exchange member (24) in the above embodiment, the first heat exchange member (23) and the first heat exchange member (23) are provided as shown in FIGS. The convex portions (29) may be provided on both of the two heat exchange members (24), which makes it possible to obtain a sufficient dimension 1 even with a material having poor drawability, and to reduce the air passage resistance. be able to. Further, as shown in FIGS. 7 and 8, the first heat exchange member (23) and the second heat exchange member (24) are provided with two or more convex portions (29), and each of them has a flow port (26). By providing the openings (28) and caulking them, the surface area can be increased and the heat exchange efficiency can be improved.

Further, as shown in FIG. 9, the baffle plate (30) is formed by first forming the baffle plate (30) so that the caulking portions of the flow port (26) and the opening (28) in FIG. The combustion exhaust gas should meander in the heat exchanger (21) without being interposed between the flange (25) of the heat exchange member (23) and the flange portion (27) of the second heat exchange member (24). Therefore, the number of parts can be reduced and the heat exchange efficiency can be improved. Moreover, since the caulking portions are different by 90 ° sequentially, the distance from the flow port (26) to the opening (28) between the plurality of heat exchange elements (22) is at the furthest positions in the circumferential direction, and the meandering. Since the distance over which the heat is exchanged is the longest, the heat is transferred to a wide range of the heat exchanger (21), and the heat exchange efficiency is best without any uneven heat conduction.

[0016] Therefore, the heat exchange efficiency of the heat exchanger (21) itself is improved without unnecessarily increasing the surface area of the heat exchanger by increasing the number of circulation ports or openings, and the air flow on the outer peripheral wall is also good. Therefore, the heat exchange efficiency can be improved. Of course, in the case of three caulking portions, they may be formed so as to differ by 60 °.

As described above, the second heat exchange member and the first heat exchange member are arranged such that the plurality of heat exchange elements are located at the positions where the caulking portions of the heat exchange element, which are the flow openings and the openings, are most distant from each other in the circumferential direction. If the and are sequentially connected, the combustion exhaust gas meanders in the heat exchange body, so that the baffle plate can be omitted and the heat exchange efficiency of the heat exchanger can be improved.

Further, when the first heat exchange member and the second heat exchange member have a structure having a plurality of flow ports and a convex portion, respectively, and when a plurality of heat exchange bodies are sequentially connected to the plurality of flow ports and the convex portions, If they are provided so as to be most distant from each other in the circumferential direction, the heat is widely transmitted to the heat exchanger and the deviation of heat conduction can be reduced as much as possible, so that the heat exchange efficiency is further improved.

[0019]

[Effect of device]

 As described above, this invention is an integrally molded product of both the first heat exchange member and the second heat exchange member, and does not require brazing or other members to assemble, so workability is also improved. It can be manufactured inexpensively and easily, and the airtightness of the connecting points can be kept high without any seal treatment, improving safety.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state of a part of FIG. 1 before assembly.

FIG. 3 is a cross-sectional view showing a state where FIG. 2 is assembled.

FIG. 4 is a schematic view showing a state in which the heat exchanger of FIG. 1 is incorporated in a warm air heater.

FIG. 5 is a state diagram showing a state of a part before assembly of another embodiment of the present invention.

6 is a cross-sectional view showing a state where FIG. 5 is assembled.

FIG. 7 is a state diagram showing a state of a part before assembly of another embodiment of the present invention.

8 is a cross-sectional view showing a state where FIG. 7 is assembled.

FIG. 9 is a perspective view showing another embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a conventional heat exchanger.

[Explanation of symbols]

21 heat exchanger, 22 heat exchanger, 23 first heat exchange member, 24 second heat exchange member, 25 flange, 26 flow port, 27 flange portion, 28 opening

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 24, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of device] Heat exchanger

[Scope of utility model registration request]

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state of a part of FIG. 1 before assembly.

FIG. 3 is a cross-sectional view showing a state where FIG. 2 is assembled.

FIG. 4 is a schematic view showing a state in which the heat exchanger of FIG. 1 is incorporated in a warm air heater.

FIG. 5 is a state diagram showing a state of a part before assembly of another embodiment of the present invention.

6 is a cross-sectional view showing a state where FIG. 5 is assembled.

FIG. 7 is a state diagram showing a state of a part before assembly of another embodiment of the present invention.

8 is a cross-sectional view showing a state where FIG. 7 is assembled.

FIG. 9 is a perspective view showing another embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a conventional heat exchanger.

[Explanation of symbols] 21 heat exchanger, 22 heat exchange body, 23 first heat exchange member, 24 second heat exchange member, 25 flange, 26 flow port, 27 flange portion, 28 opening

Claims (1)

[Scope of utility model registration request] 1. A first heat exchange member made of a thin steel plate that has a flow opening at the bottom and a flange on the periphery and is formed into a substantially dish shape, and a convex portion having an opening corresponding to the flow opening at the bottom. And a second heat exchange member made of a thin steel plate drawn into a substantially dish shape having a flange portion corresponding to the flange on the periphery, and airtightly caulking the edges of the flow opening and the opening. A plurality of heat exchange elements are configured, and the plurality of heat exchange elements are configured by sequentially connecting the second heat exchange member and the first heat exchange member by means of airtight caulking of their flange portions and flanges. Characteristic heat exchanger.