JP2002318090A - Duplex heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duplex heat exchanger capable of preventing foreign matter from accumulating between core parts and preventing the progress of corrosion. SOLUTION: In a duplex heat exchanger, a radiator side plate 113 and a condenser side plate 213 have a contact with each other over the lengthwise direction, and a gap part 300 is formed between a radiator core part 110 and a condenser core part 210. The radiator core part 110 and the condenser core part 210 are assembled, and both side plates 113 and 213 are arranged at the upper side and lower side for use. In such a duplex heat exchanger, discharge holes 113a and 213a discharging foreign matter are provided in the areas corresponding to the gap part 300 of at least one of both side plates 113 and 213 arranged at the lower side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite heat exchanger in which a radiator core for cooling an engine and a condenser core for an air conditioner are integrally assembled.

[0002]

2. Description of the Related Art As shown in FIG. 7, a conventional double heat exchanger comprises a radiator side plate 113 provided at an end of a radiator core 110 and a capacitor provided at an end of a capacitor core 210. The side plates 213 and the side walls 11 extend in the longitudinal direction (the direction perpendicular to the drawing).
3b and 213b so that the bolt holes 113
c and 213c are known in which a bolt 500 is inserted and connected and fixed (JP-A-10-30699).
No. 4).

[0003] In this manner, the capacitor core section 210 can be easily assembled to the vehicle in both the vehicle assembly line and the vehicle dealer.

Further, since the side plates 113 and 213 are brought into contact in the longitudinal direction, a so-called duct effect is obtained, the amount of air passing through the capacitor core 210 is increased, and the heat of the capacitor core 210 is increased. I try to improve the exchange ability.

[0005]

However, heat exchange between the two core parts 110, 210 by heat transfer from the radiator core part 110 having a high temperature to the capacitor core part 210 having a low temperature is usually performed. Since the gap portion 300 is formed to prevent a decrease in performance, foreign substances such as dust, dust, dust, and rainwater mixed with the inflowing air accumulate on the lower side plates 113 and 213. Therefore, there is a problem that the corrosion of the core portions 110 and 210 proceeds.

An object of the present invention, in view of the above problems, is to provide a double heat exchanger capable of preventing foreign substances from being deposited between core portions and preventing the progress of corrosion.

[0007]

The present invention employs the following technical means to achieve the above object.

According to the first aspect of the present invention, the radiator side plates (113) provided at both ends of the radiator core (110) for cooling the engine cooling water, respectively.
And a condenser core part (21) for cooling the refrigerant of the air conditioner.
0), the radiator side plate (113) and the capacitor side plate (213) are respectively in contact with each other in the longitudinal direction, and the radiator core is provided. A gap (300) is formed between the portion (110) and the capacitor core portion (210), the radiator core portion (110) and the capacitor core portion (210) are assembled, and both side plates (113, 213) is used by being arranged on the upper and lower sides in a double heat exchanger, and both side plates (113,
213), the discharge holes (113a, 213) for discharging foreign matter are provided in a region corresponding to at least one of the gaps (300).
a) is provided.

Thus, each core portion (110, 210)
Foreign matter such as dust, dust, dust, and rainwater mixed when cooling air passes through the discharge holes (113a, 213a), and can accumulate on both lower side plates (113, 213). Since this disappears, the occurrence and progress of corrosion can be prevented.

According to the second aspect of the present invention, both core portions (1
10, 210), the core portion (11
The fin pitch of 0) is set to be larger than that of the core section (210) on the upstream side.

As a result, the discharge holes (113a, 213)
In addition to the effect of discharging the foreign matter from a), the foreign matter easily passes through the core part (110) on the downstream side, so that the accumulation on the lower side plates (113, 213) can be suppressed. Become like

The reference numerals in parentheses of the above means indicate the correspondence with the concrete means described in the embodiments described later.

[0013]

(First Embodiment) FIGS. 1 to 3 show a first embodiment of the present invention. A radiator 1 for cooling engine cooling water for a vehicle according to the present invention.
00 and a condenser 200 for cooling the refrigerant of the air conditioner are fastened by bolts 500 via a mounting bracket 400 to form an integrated heat exchanger.

The radiator 100 includes a radiator core (hereinafter, core) 110 and left and right tanks 120 and 130.
Consisting of The core portion 110 is formed by alternately laminating fins 111 formed into a waveform from a thin coil material and tubes 112 formed into a flat cross section from a thin coil material in the vertical direction, and Radiator side plate as reinforcement member (hereinafter, side plate)
113 is provided.

The upper and lower side plates 113 each have a U-shaped cross section that opens to the opposite side of the core.
It has two side walls 113b. And this side wall 1
13b is provided with a plurality of bolt holes 113c for mounting a mounting bracket 400 described later.

The left tank 120 and the right tank 130 are formed by bending a thin plate material into a box shape. On the surface of both tanks 120 and 130 facing the core 110,
A plurality of tube holes (not shown) are provided.
The left and right ends of the plurality of tubes 112 are fitted so that the inside of the plurality of tubes 112 and the inside of both tanks 120 and 130 communicate with each other.

In both tanks 120 and 130, pipes (not shown) communicating with the inside are provided on the wall surfaces on the opposite side (downstream of the air flow) of a condenser 200 described later.

Each of the above members is made of an aluminum material, and after being assembled as described above, is brazed integrally to form a radiator 100.

The cooling water flowing out of the engine flows through the tube 112 of the core part 110 from one pipe and flows out of the other pipe.
When flowing through the interior 2, heat is promoted by the fins 111 to be cooled.

Next, the capacitor 200 will be described. The capacitor 200 also has a structure similar to that of the radiator 100, and includes a capacitor core (hereinafter, core).
210 and left and right header tanks 220 and 230.

The core portion 210 has a fin 211 and a tube (here, an extruded tube) 212 alternately laminated in the vertical direction, and a capacitor side plate (hereinafter, a side plate) 213 is provided on the upper and lower outermost portions. Things. The upper and lower side plates 213 each have a U-shaped cross section having a side wall 213b, and the side wall 213b is provided with a plurality of bolt holes 213c for mounting a mounting bracket 400 described later.

On the left and right sides of the core portion 210, a substantially cylindrical left header tank 220 and a right header tank 230 are provided.
Each inside communicates with the inside of the plurality of tubes 212.

An inlet joint 221 and an outlet joint 222 through which the refrigerant flows in and out of the left header tank 220 are provided above and below the left header tank 220. A separator (not shown) that divides a space in the inside is provided.

On the side opposite to the core of the right header tank 230, there is provided a substantially cylindrical liquid receiver 240 for separating the condensed refrigerant into a gas-liquid two-phase.
It communicates with the inside. That is, in the right header tank 230, a similar separator (not shown) is provided at the same position in the vertical direction as the separator in the left header tank 220, and the right header tank 230 divided by the separator is provided. The upper space and the lower space inside each communicate with the inside of the liquid receiver 240.

Each of the above-mentioned members is made of an aluminum material. After being assembled as described above, they are integrally brazed to form a capacitor 200.

The refrigerant flowing from the inlet joint 221 flows from the upper space of the left header tank 220 to the upper space of the right header tank 230, and is condensed therebetween. Then, it flows into the liquid receiver 240 and is separated into a gas-liquid two-phase,
Right header tank 230 so that only liquid refrigerant makes U-turn
From the lower space to the lower space of the left header tank 220, is further supercooled, and flows out of the outlet joint 222.

The radiator 100 and the condenser 200 thus formed are connected via a mounting bracket 400 having a pin 420 serving as a mounting portion to the vehicle.
The bolt 500 is inserted into the bolt holes 113c and 213c so as to be connected and fixed to each other. More specifically, as shown in FIG.
The three side walls 113b and 213b are assembled so that they contact each other in the longitudinal direction (the direction perpendicular to the drawing). Then, both the core portions 110 and 210 are so arranged that the core portions 110 and 210 are not affected by heat radiation.
A gap 300 is provided between the gaps 0 and 0.

The side walls 113b and 213b are brought into contact with each other to prevent the cooling air passing through the core portions 110 and 210 from flowing out of the gap portion 300 to the outside or flowing in from the outside. It is assumed to have.

Then, both side plates 112, 213
And the condenser 200 is located in front of the radiator 100 (upstream of the air flow).
The vehicle is mounted in front of the engine room of the vehicle via the pin portion 410 so that

Next, the discharge hole 113, which is an essential part of the present invention, will be described.
a and 213a will be described with reference to FIG. The discharge holes 113a and 213a are provided in the lower side plates 113 and 213 in a region where the gap 300 is formed, and the gap 300 communicates with the outside of the both side plates 113 and 213. It is formed as a hole. The discharge holes 113a and 213a are capable of discharging foreign matters such as dust, dust, dust, and rainwater mixed in the cooling air to the outside, and aiming at a range where the above-described duct effect is not lost, one by one. The opening areas of the discharge holes 113a and 213a themselves are reduced, and the side plates 11 are alternately arranged.
3 and 213 are provided in the longitudinal direction.

As a result, foreign matters such as dust, dust, dust, and rainwater mixed when the cooling air passes through the core portions 110 and 210 can be discharged from the discharge holes 113a and 213a. Since it is not deposited on 113 and 213, the occurrence and progress of corrosion can be prevented.

If the fin pitch of the core portion 110 of the radiator 100 on the downstream side of the cooling air is set to be larger than the fin pitch of the capacitor core portion 210, the effect of discharging foreign substances from the discharge holes 113a and 213a is obtained. In addition, the foreign matter easily passes through the core portion 110 on the downstream side, so that the lower side plates 113, 2
13 can be suppressed.

(Other Embodiments) As shown in FIG. 4A, the radiator side plate 113 is
4b, the discharge holes 113a may be provided only on the side plate 113 side as shown in FIG. Conversely, the capacitor side plate 213 may be overhanged with respect to the core portion 210, and the discharge hole 213a may be provided only in the side plate 213.

Accordingly, the side plate on which the discharge holes 113a and 213a are not provided can be used as a standard member.

Further, as shown in FIG.
May be provided so as to cut out the side wall 113b of the side plate 113. Side walls 2 facing each other even if cut out in this way
13b can be formed as a hole having an open upper side, and the same effects as in the first embodiment can be obtained. The width of the notch may be arbitrarily determined as long as the duct effect is not lost.

Further, as shown in FIG.
10 so that the vertical dimension of the side plate 113 is different from that of the side plate 113 and the side plate 213.
The discharge holes 113a and 213a may be provided on the upper surface of each of them.

Thus, foreign substances can be effectively discharged in the direction of air flow.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an entire duplex heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a core part of FIG.

FIG. 3 is a perspective view of a portion A in FIG.

FIGS. 4A and 4B are longitudinal sectional views of a core part, and FIG. 4B is a perspective view of a part B of FIG.

FIG. 5 is a perspective view showing another example 2 of another discharge hole.

FIGS. 6A and 6B show a third example of another discharge hole, in which FIG. 6A is a longitudinal sectional view of a core portion, and FIG.

FIG. 7 is a cross-sectional view showing a core part of a duplex heat exchanger according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Duplex heat exchanger 110 Radiator core part 113 Radiator side plate 113a Discharge hole 210 Capacitor core part 213 Capacitor side plate 213a Discharge hole

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) F28F 9/26 F28F 9/26

Claims (2)

[Claims] A radiator core for cooling engine cooling water; radiator side plates provided at both ends of the radiator core; and cooling a refrigerant of an air conditioner. Capacitor core (210)
And a capacitor side plate (213) disposed at each end of the capacitor core (210), wherein the radiator side plate (113) and the capacitor side plate (213) extend in the longitudinal direction with respect to each other. Radiator core part (110) contacted across
A gap (300) is formed between the radiator core (210) and the condenser core (210).
0) and the capacitor core part (210) are assembled, and the both side plates (113, 213) are assembled.
Are used by being disposed on the upper and lower sides, wherein both side plates (113, 21) disposed on the lower side are used.
3) A discharge hole (113a, 213) for discharging foreign matter is provided in a region corresponding to at least one of the gaps (300).
a) a double heat exchanger, wherein a) is provided. 2. The fin pitch of the core portion (110) on the downstream side of the air flow of the core portions (110, 210) is set to be larger than that of the core portion (210) on the upstream side. The double heat exchanger according to claim 1, wherein: