JP2511157Y2 - Automotive heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The heat exchanger for an automobile according to the present invention condenses and liquefies the refrigerant vapor, and therefore, as a condenser to be incorporated in a refrigerator constituting an automobile air conditioner or as a cooling device. It is used as a radiator for radiating water.

(Prior Art) Generally, a vapor compression refrigerator is incorporated in an air conditioner for an automobile. In the case of such a vapor compression refrigerator, a high temperature and high pressure refrigerant vapor discharged from a compressor. In order to condense and liquefy, the condenser 1 is provided after the compressor as shown in FIG.

The condenser 1 includes a pair of left and right headers 2a and 2b arranged at intervals, a plurality of heat transfer tubes 3 and 3 communicating the headers 2a and 2b, and adjacent heat transfer tubes 3 and 3. It is composed of a plurality of fins 4 and 4 provided between them, a fluid inlet (not shown) provided in one header 2a, and a fluid outlet (not shown) provided in the other header 2b.

Lid pieces 5 and 5 are fitted into the end openings of the headers 2a and 2b, and further brazed and fixed, thereby closing the opening parts at both ends of the headers 2a and 2b.

Further, by providing a pair of side plates 7, 7 at both ends of the core portion 6 composed of the plurality of heat transfer tubes 3, 3 and the plurality of fins 4, 4, both sides of the core portion 6 are suppressed. ing.

When condensing and liquefying the high temperature and high pressure refrigerant vapor discharged from the compressor, one of the headers 2a
The refrigerant sent to is sent to the other header 2b through the plurality of heat transfer tubes 3, 3. While flowing through the heat transfer tubes 3 and 3, the refrigerant vapor exchanges heat with the air passing through the core portion 6 composed of the heat transfer tubes 3 and 3 and the fins 4 and 4 to condense and liquefy. From the fluid outlet provided on the other header 2b, it is sent toward the evaporator. It should be noted that instead of providing the fluid inlet and the fluid outlet separately for the pair of headers 2a and 2b, the intermediate portion of one header 2a is partitioned and
There is also a structure in which a fluid inlet and a fluid outlet are provided at both ends of this header 2a.

(Problems to be solved by the invention) However, in the case of assembling a heat exchanger for automobiles such as a condenser, which has the above-mentioned structure and functions, the following problems have conventionally been solved. there were.

That is, in the conventional heat exchanger for automobiles such as the condenser 1, the side plates 7, 7 are fixed to both sides of the core portion 6, and the lid pieces 5, which are formed separately from the side plates 7, 7, 5, the opening portions at both ends of each header 2a, 2b were closed, so that the assembly work of the capacitor 1 was troublesome.

Therefore, for example, as shown in Japanese Utility Model Publication No. 54-122456,
By integrally forming the lid pieces 5 and 5 on both end portions of the side plates 7 and 7, the side plates 7 and 7 are fixed to both sides of the core portion 6 and at the same time, both end openings of the headers 2a and 2b are closed. Things are being considered.

That is, as shown in FIGS.
On both ends of the headers 2a, 2b are formed with projections 8 and 8 which fit into the end openings of the headers 2a without gaps, or, as shown in FIGS. By forming the adhered portion 9 which can tightly fit the end portions of the headers 2a (2b), the header portions 2a and 2b can be fitted into the opening portions on both ends of the headers 2a and 2b, and at the same time, the side plates 7 and 7 can form core portions 6 It is considered to suppress both sides of.

However, in the case of such a structure that has been conventionally considered, before the side plates 7 and 7 are brazed and fixed to both ends of the headers 2a and 2b, the side plates 7 and 7 are separated from each other. It is not possible to prevent the space from being widened (it is impossible to prevent the convex portions 8 and 8 and the adhered portion 9 from coming out of the openings of the headers 2a and 2b).

Therefore, when assembling a capacitor having a structure as shown in FIGS. 5 to 8 and further brazing, the side plates 7 and 7 should not be widened until the brazing is completed. The capacitor 1 assembled as shown in FIG. 5 must be held by a jig, and the assembling work is troublesome.

In addition, in the microfilm of Japanese Patent Application No. 1-29071 (Japanese Utility Model Laid-Open No. 2-122986), a through hole is formed by cutting the end side surface of the header in FIG. 1 (a) and its description. There is a structure that inserts the circular plate at the end of the side plate and brazes it to close the header end.However, this weakens the brazing between the side of the circular plate and the end of the through hole. Risk of leakage.

The vehicle heat exchanger of the present invention eliminates the above-mentioned troubles.

(Means for Solving the Problems) The vehicle heat exchanger of the present invention, like the conventional vehicle heat exchanger described above, communicates between a pair of headers arranged at intervals and both headers. A plurality of heat transfer tubes, a plurality of fins provided between adjacent heat transfer tubes, a fluid inlet for sending a fluid to the heat transfer tube via a header, and a fluid from the heat transfer tube via a header. It is composed of a fluid outlet for taking out and a pair of side plates in which both ends of a core portion composed of the plurality of heat transfer tubes and a plurality of fins are suppressed.

Further, in the automobile heat exchanger of the present invention, the above 1
The pair of side plates shall have insert plate portions at both ends that block the inside of the header and the through holes by inserting the through plates into the header. When the inner peripheral surface of the header at the leading edge is matched, a butting step portion that abuts the header cross section at both ends of the through hole is formed, and each insertion plate portion is inserted into each through hole, and each insertion plate portion causes each header. The headers and the side plates are brazed to each other with their ends closed.

(Operation) The operation itself when exchanging heat with the fluid by the vehicle heat exchanger of the present invention configured as described above is the same as that of the conventional vehicle heat exchanger described above.

However, in the case of the heat exchanger for an automobile of the present invention, by inserting the insertion plate portions formed at both ends of each side plate into the through holes formed at both ends of each header, both end openings of each header are opened. Since it is closed, the work of attaching and fixing the side plate and the work of closing the openings at both ends of each header can be performed at the same time.

In addition, by inserting the both ends of each side plate where the abutting step is formed into the through holes formed at both ends of each header, it is possible to prevent the distance between the headers from widening and block the through holes. Since the brazing performed becomes strong, a jig for preventing the space between the side plates from expanding during brazing becomes unnecessary, and the leakage from the through hole can be reliably prevented.

(Embodiment) Next, the present invention will be described in more detail with reference to the illustrated embodiment.

1 to 3 show an embodiment of the present invention. FIG. 1 is a front view corresponding to the portion A in FIG. 4, FIG. 2 is a plan view seen from above in FIG. 1, and FIG. The figure is a plan view showing only the side plate.

The automotive heat exchanger of the present invention itself has a circular cross-section as shown in FIG. 4, like the condenser which is one of the conventional automotive heat exchangers described above.
Any of a pair of headers 2a and 2b, a plurality of heat transfer tubes 3 and 3 communicating the two headers 2a and 2b, and a plurality of fins 4 and 4 provided between adjacent heat transfer tubes 3 and 3. Header 2a
(Or 2b) and a fluid inlet for feeding a fluid such as a refrigerant to the heat transfer tubes 3 and 3 and any header 2b (or 2a)
A fluid outlet for taking out a fluid such as a refrigerant from the heat transfer tubes 3 and 3 via a heat exchanger and both ends of a core portion 6 composed of the heat transfer tubes 3 and 3 and the fins 4 and 4 are suppressed, Both end portions of the side plates 7 and 7 are brazed and fixed to the pair of headers 2a and 2b, respectively.

Further, in the heat exchanger for an automobile of the present invention,
As shown in FIG. 2, slit-shaped through holes 10 are formed on the opposite side surfaces of both ends of each header 2a (2b).
It is formed over the semicircle of each header 2a (2b).

Along with this, at both ends of each side plate 7,
As shown in FIG. 3, an insertion plate portion that can be inserted into the through hole 10
11 are formed.

Each insertion plate portion 11 has a semicircular shape in order to match the shape of the tip edge 11a with the shape of the inner peripheral surface of the header 2a (2b), and at both ends of the tip edge 11a, Through hole 1
The abutting step portions 11b and 11b are formed so as to abut both end portions of 0.

In the case of assembling as a heat exchanger, the insertion plate portions 11 formed at both ends of each side plate 7 are attached to each header 2a.
The butting steps 11b, 11b are inserted into the through holes 10 formed at both ends of (2b) until they abut against both ends of the through hole 10.

In this way, each insertion plate part 11 is connected to the above-mentioned butt step parts 11b, 1
When the insert 1b is inserted into the through hole 10 until both ends of the through hole 10 are abutted, the leading edge 11a of the insert plate portion 11 will be
Contact the inner peripheral surface of a (2b) and insert each header 11 into each header 2a.
The openings at both ends of (2b) are closed.

Therefore, the headers 2a (2b) and the side plates 7 are brazed to each other while the opening portions at both ends of the headers 2a (2b) are closed by the insertion plate portions 11, so that the automotive vehicle of the present invention can be manufactured. Use as a heat exchanger.

By using the automotive heat exchanger of the present invention configured as described above as a condenser, the action itself when the high temperature and high pressure refrigerant vapor is condensed and liquefied into a liquid refrigerant is This is the same as in the case of the heat exchanger for automobiles described above. When condensing and liquefying the high-temperature and high-pressure refrigerant vapor discharged from the compressor, one of the headers is passed through the fluid inlet.
Refrigerant sent to 2a (or 2b) is transferred to a plurality of heat transfer tubes 3, 3
Through the other header 2b (or 2a). While flowing through the heat transfer tubes 3 and 3, the refrigerant vapor exchanges heat with the air passing through the core portion 6 composed of the heat transfer tubes 3 and 3 and the fins 4 and 4 to condense and liquefy. Other header 2b
(Or 2a), it is sent out toward the evaporator from the fluid outlet.

However, in the case of the heat exchanger for an automobile of the present invention, the insertion plate portions 11 formed at both ends of each side plate 7 are attached to each header 2a.
By inserting into the through holes 10 formed at both ends of (2b),
Since the openings at both ends of each header 2a (2b) are closed, it is possible to perform the work of attaching and fixing the side plate 7 and the work of surely closing the openings at both ends of each header 2a (2b) at the same time. No need for troublesome work such as brazing and fixing 5, 5 (Fig. 4).

In addition, through holes 10 formed at both ends of each header 2a (2b)
Since both ends of each side plate 7 are inserted into the above, it is possible to prevent the distance between the headers 2a and 2b from expanding, and thus prevent the distance between the side plates 7 from expanding during brazing. No jig is needed.

Before brazing is completed, a jig is required to prevent the distance between the headers 2a and 2b from expanding, but the force that causes the headers 2a and 2b to move apart is due to the large number of heat transfer tubes. 3,
The jig is simple because the side plates 7 sandwiching the core portion 6 in the stacking direction of the fins 3 and the fins 4 and 4 are weaker than the forces to separate them.

(Effect of the Invention) Since the heat exchanger for a vehicle of the present invention is constructed and operates as described above, the manufacturing cost of the heat exchanger can be reduced by simplifying the assembly work of the heat exchanger.

[Brief description of drawings]

1 to 3 show a first embodiment of the present invention, FIG. 1 is a front view corresponding to part A in FIG. 4, FIG. 2 is a plan view seen from above in FIG. FIG. 3 is a plan view showing only a side plate, FIG. 4 is a front view showing a first example of a condenser which is one kind of conventional vehicle heat exchangers, and FIG. 5 is a second example thereof. A front view, FIG. 6 is a plan view seen from above in FIG. 5, FIG. 7 is a partial plan view showing the third example, and FIG. 8 is a sectional view taken along line BB in FIG. 1: condenser, 2a, 2b: header, 3: heat transfer tube, 4: fin,
5: Lid piece, 6: Core part, 7: Side plate, 8: Convex part, 9: Attached part, 10: Through hole, 11: Insert plate part, 11a: Tip edge, 11b: Butt step part.

Claims (1)

(57) [Scope of utility model registration request] 1. A pair of headers spaced apart,
A plurality of heat transfer tubes communicating between both headers, a plurality of fins provided between adjacent heat transfer tubes, a fluid inlet for sending fluid to the heat transfer tubes through the header, and the above through the header A heat exchanger for an automobile, comprising: a fluid outlet for taking out a fluid from a heat transfer tube; and a pair of side plates that suppresses both ends of a core portion composed of the plurality of heat transfer tubes and a plurality of fins. The pair of headers has slit-shaped through holes formed on the side surfaces of both ends of the headers facing each other, and the pair of side plates closes the inside of the header and the through hole by inserting the through holes into the header. It is assumed that the insert plate portion is formed at both ends, and the insert plate portion abuts the tip edge that matches the inner peripheral surface of the header and the header cross section at both ends of the through hole when the header inner peripheral surface of the tip edge matches. Form a butt step and insert each A heat exchanger for an automobile, characterized in that a plate portion is inserted into each of the through holes, and that each header and each side plate are brazed and joined with each insertion plate portion closing an end portion of each header. .