JPH0615265Y2 - Heat exchanger - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat exchanger used as, for example, an evaporator of a heating device, and more particularly to evaporating a heat medium such as freon by combustion heat of an oil burner or a gas burner. The present invention relates to a heat exchanger used as an evaporator.

In this specification, the front and rear are based on the length direction of the combustion chamber body, the front means the direction indicated by the arrow (X) in FIGS. 1 and 7, and the rear means the opposite side. To do. The upper and lower sides refer to the upper and lower sides of FIGS. 1 to 3 and FIGS. 7 to 9. Furthermore, left and right shall be referred to as backward.

2. Description of the Related Art Conventionally, as this kind of heat exchanger, as shown in FIG. 10, a through-hole (61) extending in the axial direction of the main body (60) is formed in a peripheral wall of a cylindrical combustion chamber main body (60) made of an aluminum extruded material. ) Are formed at predetermined intervals in the circumferential direction, and the straight pipe portions of the plurality of hairpin-shaped heat medium distribution pipes (62) are inserted into the adjacent through holes (61) to distribute each hairpin-shaped heat medium distribution. A pipe (62) connected by a U-shaped connecting pipe (63) was used.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above conventional heat exchanger, the heat medium flow path is bent in a U shape at the bent portion of the heat medium flow pipe (62) and the connecting pipe (63). However, there is a problem that the pressure loss becomes large because the minimum bending radius is limited. In addition, since the minimum bending radius is limited, the pitch of the linear heat medium passage cannot be reduced, and the area of the heat medium flow passage is reduced. Further, there is a problem that the manufacturing work is troublesome.

An object of the present invention is to provide a heat exchanger that solves all the above problems.

Means for Solving the Problems A heat exchanger according to the present invention comprises a combustion chamber main body having a plurality of linear heat medium flow passages extending in the front-rear direction on a peripheral wall, and a heat medium fixed to both front and rear ends of the combustion chamber main body. The combustion chamber is provided with a lid that closes the openings at both ends of the flow passage, and one straight heat medium flow passage or two adjacent straight heat medium flow passages are provided.
Divided into a plurality of groups consisting of the above linear heat medium passage,
The front and rear end portions of each group are communicated alternately in the front and rear direction by communication grooves formed in the front and rear end surfaces of the combustion chamber body.

Effect According to the heat exchanger of the present invention, the linear heat medium passage formed in the peripheral wall of the combustion chamber body is formed into one linear heat medium passage or a plurality of groups of two or more adjacent linear heat medium passages. Since the front and rear end portions of each group are sequentially and alternately communicated with each other by the communication grooves formed on the front and rear end surfaces of the combustion chamber body, the U-shaped bent portion is formed in the heat medium passage as in the conventional case. It does not exist, and the pressure loss when the heat medium flows is small. Moreover, the pitch between the adjacent linear heat medium passages can be made extremely small, and as a result, the heat exchange efficiency is significantly improved as compared with the conventional one.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
The same parts and the same parts are denoted by the same reference symbols throughout the drawings. In the following description, the term "aluminum" includes aluminum alloy in addition to pure aluminum.

Example 1 This example is shown in FIGS. First
1 to 4, a heat exchanger (1) includes a cylindrical combustion chamber body (11) made of an aluminum extruded material, in which a plurality of linear heat medium flow passages (12) extending in the front-rear direction are formed in a peripheral wall, The combustion chamber main body (11) is provided with combustion chambers (10) including lids (13) fixed to the front and rear end surfaces of the heat medium flow passage (12) by being fixed thereto by welding, brazing or the like.

The surface of the combustion chamber body (11) is dipped in a galvanizing bath in a non-energized state to form an extremely thin zinc film, and then a galvanizing layer is formed by an electroplating method using the same galvanizing bath as above. Is preferably formed. The galvanized layer is
By heating the combustion chamber body (11) and the lid (13) for the purpose of presenting the brazing holes, they diffuse into the aluminum and form a zinc diffusion layer for corrosion protection.

The heat medium flow passage (12) has a plurality of adjacent heat medium flow passages (12).
It is divided into 8 groups (A) to (H). On the front end face of the combustion chamber body (11), two adjacent groups (H) (A), (B)
(C), (D) (E) and (F) (G), and one group (H)
(B) All heat medium flow passages (12) in (D) and (F) and the other group (A)
Four communication grooves (14) are formed which communicate with the total heat medium flow passages (12) of (C), (E) and (G). Also, the combustion chamber body
On the rear end surface of (11), there is a circumferential direction of 45 with the communicating groove (14).
Two groups (A), (B), and (C) that are adjacent to each other at positions that are offset from each other.
(D), (E) (F) and (G) (H), and one group (A)
(C) All heat carrier flow passages (12) of (E) and (G) and the other group (B)
Four communication grooves (15) for communicating with the total heat medium flow passages (12) of (D), (F) and (H) are formed. And each group (A)
The front and rear ends of (H) to (H) are alternately communicated with each other by the communication grooves (14) and (15).

Both lids (13) are flat and circular. A heat medium inlet pipe (16) is attached to a portion of the front lid (13) corresponding to the communication groove (14) at the lower end, and the communication groove (14) at the upper end.
A heat medium outlet pipe (17) is attached at a position corresponding to. Therefore, the heat medium flowing in from the heat medium inlet pipe (16) flows rearward through the heat medium flow passage (12) of the group (H) (A), is formed on the rear end face and is in the group (A) ( B) and (G) (H) through the communication groove (15), it flows into the heat medium flow passage (12) of the group (B) (G), inside these heat medium flow passage (12) The group flowed forward and passed through the communication groove (14) that straddled the groups (B) (C) and (F) (G).
(C) (F) flows into the heat medium flow passage (12), flows backward in these heat medium flow passages (12), and further into groups (C) (D) and (E)
After passing through the communication groove (15) straddling (F), it flows into the heat medium flow passages (12) of the groups (D) and (E), and flows forward in these heat medium flow passages (12) to form the communication grooves. Exit via exit pipe (17) via (14).

FIG. 5 shows a heating device using the heat exchanger (1) as an evaporator.

In the heating device, for example, Freon is used as the heat medium, and the indoor unit (26) and the outdoor unit (27) are used.
Is equipped with. The indoor unit (26) has a condenser in a casing (30) having an air inlet (28) and an air outlet (29).
It is equipped with (31) and a blower (32).
The heat exchanger (1) is arranged in the casing (33) of the outdoor unit (27), and its heat medium inlet pipe (16) and the condenser (31).
Outlet side header, and heat carrier outlet pipe (17) and condenser (31)
The inlet side headers of are connected by conduits (34) and (35), respectively. In the casing (33) of the outdoor unit (27),
A check valve (36) and a receiver (3
7) are provided in this order from the condenser (31) side. A check valve (38) is provided along the other conduit (35). Inside the combustion chamber body (11) of the heat exchanger (1), the oil burner is installed from the rear end.
(39) is inserted and the heat medium flowing in the heat medium flow passage (12) is heated and vaporized by the combustion heat of the burner (39). Further, an exhaust gas pipe (not shown) having a tip extending to the outside of the casing (33) is connected to the front end opening of the combustion chamber body (11) so that the exhaust gas is discharged into the atmosphere. It has become.

In such a configuration, the combustion gas of the oil burner flows forward through the front end opening of the combustion chamber body (11). The heat medium flowing in the heat medium flow passage (12) as described above is heated and vaporized by the heat of combustion of the oil burner (39), and passes through the conduit (35) from the heat medium outlet pipe (17) to the condenser. Sent to (31). Then, while passing through the condenser (31), it dissipates heat to the indoor air sucked into the casing (30) through the suction port (28) by the blower (32) and liquefies, and then passes through the conduit (34). To the heat medium inlet pipe (16) of the heat exchanger. The air that has taken heat from the heat medium passing through the condenser (31) in the casing (30) is blown out into the room through the air outlet (29), and the air is heated in the room.

In the above embodiment, the combustion chamber body (11) may be used with its axis oriented vertically. Further, the combustion chamber body (11) is not limited to the cylindrical shape, and may be a rectangular tube shape.

Example 2 This example is shown in FIG. In FIG. 6, front and rear openings of the heat medium flow passage (12) of the combustion chamber body (11) have shapes corresponding to the communication grooves (14) and (15), and the communication grooves (1
4) A plurality of lids (20) fixed to the peripheral edges of the communication grooves (14) and (15) at their peripheral edges so that the heat medium flow passages (12) opened in (15) can communicate with each other are closed. It was the one. Others are the same as those in the first embodiment.

Example 3 This example is shown in FIGS. 7-9. 7th
In FIG. 9 to FIG. 9, the heat exchanger (40) is composed of a top wall portion (43) and left and right side wall portions (44) that extend downwards in a row extending from the left and right side edges of the top wall portion (43) and to the front and rear. Direction of the combustion chamber body (42) made of aluminum extruded material in which a plurality of linear heat medium flow passages (45) extending in parallel are formed in parallel, and a shape corresponding to the cross-sectional shape of the combustion chamber body (42) and combustion. A combustion chamber (41) including an aluminum lid (46) fixed to the front and rear end surfaces of the chamber body (42) and closing the front and rear end openings of the heat medium flow passage (45) is provided.

The top wall portion (43) of the combustion chamber body (42) has an arc shape with a central portion protruding upward. The left and right side wall parts (44) are connected to the left and right side edges of the top wall part (43) and have the same radius of curvature as the top wall part (43), and the center part of the arcuate part (47) projects outward. And a vertical portion (48) extending downward from the lower edge of the arcuate portion (47). The top wall portion (43) and the arcuate portions (47) of the left and right side wall portions (44) meet each other to form a circular cross section. Top wall portion (43) and left and right side wall portions of the combustion chamber body (42)
The cross-sectional shape of the arc-shaped portion (47) of (44) is not limited to a truncated circle, and may be, for example, a truncated polygon.
The overall cross-sectional shape of the combustion chamber body (42) may be a substantially inverted U shape. The surface of the combustion chamber main body (42) is preferably subjected to anticorrosion treatment as in the case of the combustion chamber main body (11) of the first embodiment.

The heat medium flow passage (45) includes a top wall portion (43) and left and right side wall portions (4
4) adjacent to each other, a plurality of heat medium flow passages (45) are formed.
It is divided into eight groups (a) to (h). On the front end face of the combustion chamber main body (42), there are two communication grooves (51) for communicating the plurality of heat medium flow passages (45) belonging to the groups (a) and (h), respectively.
And across all two adjacent groups (b) (c), (d) (e) and (f) (g), and one group (b) (d) and (f) all heat transfer channels (45) and the groups (c), (e) and (g) of the other group,
Three communication grooves (52) for communicating with (5) are formed. Further, the rear end surface of the combustion chamber body (42) straddles two adjacent groups (a) (b), (c) (d), (e) (f) and (g) (h),
And one group (a) (c) (e) and (g) total heat medium flow passage (45)
And four communication grooves (53) for communicating the other heat medium flow passages (45) of the other groups (b) (d) (f) and (h). The front and rear ends of each of the groups (a) to (h) are sequentially communicated with each other in the front and rear direction alternately by the communication grooves (52) (53).

Both lids (46) are flat plates. Front lid (4
The heat medium inlet pipe (54) is attached to the portion corresponding to the communication groove (51) at the lower end of 6), and the heat medium outlet pipe (55) is attached to the portion corresponding to the communication groove (52) at the upper end. Has been. Therefore, the heat medium branched from the heat medium inlet pipe (54) into the groups (a) and (h) flows backward through the heat medium flow passages (45) of the groups (a) and (h). , Through the communication groove (53) straddling the groups (a) (b) and (h) (g) into the heat medium flow passage (45) of the groups (b) and (g),
These heat medium flow passages (45) flow forward, and the heat medium flow of the groups (c) and (f) passes through the communication grooves (52) that straddle the groups (b) (c) and (g) (f). These heat medium flow passages (45) flow into the passage (45).
Flow forward, and then flow into the heat medium flow passage (45) of the groups (d) and (e) through the communication groove (53) that straddles the groups (c) (d) and (f) (e). Then, the heat medium flows in the heat medium flow passage (45) backward, passes through the communication groove (51), and exits from the heat medium outlet pipe (55).

Aluminum corrugated fins (56) are arranged between the left and right side wall portions (44) of the combustion chamber body (42) and are brazed to the vertical portions (48) of the left and right side wall portions (44). The corrugated fins (56) are arranged such that the flat portions thereof are on a vertical plane orthogonal to the front-rear direction.

Further, at the front and rear ends of the combustion chamber body (42), the peripheral edge is the top wall portion (4
3) and end plates (57) joined to the left and right side wall parts (44) are arranged. A burner insertion port (58) is formed in the rear end plate (57).

When the heat exchanger (40) is applied to the heating device shown in FIG. 5, the heat medium inlet pipe (54) and the outlet side header of the condenser (31), and the heat medium outlet pipe (55) and the condenser ( The inlet side header of 31) is connected by conduits (34) and (35), respectively. Then, the heat exchanger (4
The oil burner (39) is inserted from the rear end into the combustion chamber body (42) of (0) through the burner insertion port (58). Further, an exhaust gas pipe (not shown) whose tip extends to the outside of the casing (33) is connected to the lower end opening of the combustion chamber body (42) so that the exhaust gas is discharged into the atmosphere. To Others are the same as those shown in FIG.

In such a configuration, the combustion gas of the oil burner (39) flows downward through the fins (56) between the left and right side wall parts (44), and the exhaust gas is discharged into the atmosphere by the exhaust gas pipe.
Then, the interior of the room is heated by utilizing the heat of combustion of the oil burner (39).

In this embodiment, a lid as shown in the above-mentioned Embodiment 2 may be used as the lid.

In the above-mentioned three embodiments, a cylindrical body may be arranged in the combustion chamber body so as to be in close contact with the inner peripheral surface of the combustion chamber body.

Effect of the Invention According to the heat exchanger of the present invention, the linear heat medium flow passage has one
It is divided into a plurality of groups consisting of one linear heat medium flow passage or two or more adjacent linear heat medium passages, and the front and rear end portions of each group are front and rear by communication grooves formed on the front and rear end surfaces of the combustion chamber body. Since they are communicated alternately one after another, there is no U-shaped bent portion in the heat medium passage as in the conventional case, and the pressure loss when the heat medium flows is small. Moreover, the pitch between the adjacent linear heat medium passages can be made extremely small,
As a result, the heat exchange efficiency is significantly improved compared to the conventional one.

In addition, since it can be manufactured by forming communication grooves at the front and rear ends of the combustion chamber body made by extrusion processing and closing the front and rear openings of the heat medium flow passage with lids, the manufacturing work is It will be much easier.

[Brief description of drawings]

1 to 4 show Embodiment 1 of the present invention, FIG. 1 is an exploded perspective view of a heat exchanger, FIG. 2 is a front view of a combustion chamber body, and FIG. 3 is a rear view of the combustion chamber body. FIG. 4 is an enlarged vertical sectional view of the front end portion of the combustion chamber body, and FIG. 5 is the first embodiment of the present invention.
6 is a schematic view showing a heating device using the heat exchanger of FIG. 6, FIG. 6 is a view corresponding to FIG. 4 showing a second embodiment of the present invention, and FIGS. 7 to 9 show a third embodiment of the present invention. FIG. 7 is an exploded perspective view of the heat exchanger, FIG. 8 is a front view of the combustion chamber body, FIG. 9 is a rear view of the combustion chamber body, and FIG. 10 is a perspective view showing a conventional example. (1) (40) …… heat exchanger, (10) (41) …… combustion chamber, (11) (42)
...... Combustion chamber body, (12) (45) …… Heat medium flow passage, (13) (20)
(46) …… Lid, (14) (15) (52) (53) …… Communication groove, (A) to (H)
(a)-(h) …… Group.

Claims (1)

[Scope of utility model registration request] 1. A combustion chamber body in which a plurality of linear heat medium flow passages extending in the front-rear direction are formed on a peripheral wall, and lids fixed to both front and rear ends of the combustion chamber body to close both end openings of the heat medium flow passage. The linear heating medium flow passage is divided into a plurality of groups each including one linear heating medium flow passage or two or more adjacent linear heating medium passages. A heat exchanger in which front and rear are alternately communicated with each other by communication grooves formed on both front and rear end surfaces of the combustion chamber body.