JP4029718B2 - Double heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dual heat exchanger in which a plurality of core parts such as a radiator core part for cooling an engine and a condenser core part for an air conditioner are assembled together.
[0002]
[Prior art]
As a conventional dual heat exchanger, as disclosed in Patent Document 1, a condenser core portion and a radiator core portion are arranged in series in the air flow direction, and one header tank is directed to the other header tank. In this case, a protrusion is formed which protrudes and contacts the other header tank.
[0003]
This prevents the header tanks from being tilted during brazing and prevents the header tanks from contacting each other over a relatively wide range. That is, the heat transfer from the header tank of the radiator having a high normal temperature to the header tank of the condenser having a low temperature is suppressed to suppress a decrease in heat exchange capability of the capacitor core portion.
[0004]
[Patent Document 1]
JP 11-311497 A
[Problems to be solved by the invention]
However, since the protrusion is provided on the header tank, the mold structure for forming the header tank is complicated and the number of assembling steps for the header tank itself is increased. Further, although the header tanks are prevented from coming into contact with each other over a wide range, the protrusions themselves are in contact with the mating header tank, so that heat transfer according to the contact area remains.
[0006]
In view of the above problems, an object of the present invention is to provide a dual heat exchanger that can be easily handled and can further reduce heat transfer between the two.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention employs the following technical means.
[0008]
In the first aspect of the present invention, the first core section (111) includes a plurality of stacked first tubes (111) and performs heat exchange between the external air and the first fluid flowing through the first tubes (111). 110) and a second core portion (210) having a plurality of stacked second tubes (211) and exchanging heat between the external air and the second fluid flowing in the second tube (211). In addition, the longitudinal direction of the first tube (111) and the second tube (211) is the same, and the first core part (110) and the second core part (210) are in the flow direction of the external air. In the dual heat exchangers arranged in series, the portions (140, 230) that are close to each other in the outer region of the first core part (110) and the second core part (210) , the elastic member (300) of low thermal conductivity is interposed The elastic member (300) is bonded to the respective surfaces of the portions (140, 230) that are close to each other, and is divided at an intermediate position between the portions (140, 230) that are close to each other. 300), the non-adhesive sides are compressed and come into contact with each other.
[0009]
Accordingly, the portions (140, 230) that are close to each other are not directly contacted by the elastic member (300), and the elastic members (300) are close to each other (140, 230) because of low thermal conductivity. ) Is prevented from moving, and a decrease in the heat exchange capacity of the core portion (110) on the low temperature side can be prevented. And since only an elastic member (300) is interposed, it can respond easily.
[0011]
Moreover , it can prevent that the water etc. from the exterior penetrate | infiltrate between the elastic surfaces (300) and the adhesion surface of the site | part (140,230) which mutually adjoins, and can prevent the corrosion resistance fall of an adhesion surface.
[0013]
Moreover , even if a relative movement due to, for example, a vibration load occurs between the two core portions (110, 210), no stress is applied to the bonded portion, and thus the elastic member (300) can be prevented from peeling off.
[0014]
Further, the invention according to claim 2 is characterized in that the elastic member (300) is discretely provided along the portions (140, 230) that are close to each other.
[0015]
Thereby, since the compression reaction force by the elastic member (300) in the part (140, 230) which adjoins mutually is not increased unnecessarily, the assembly | attachment of both core parts (110, 210) becomes easy.
[0016]
In invention of Claim 3 , a 1st core part (110) is a condensation core part (110) which liquefies and condenses the refrigerant | coolant in the refrigerating cycle as a 1st fluid, A 2nd core part (210) is A cooling core part (210) for cooling engine coolant as the second fluid, and a refrigerant is stored on the side opposite to the core part of the first tank (130) connected to the condensation core part (110). A liquid receiver (140) for liquid separation is provided, and parts (140, 230) adjacent to each other are a second tank (230) connected to the liquid receiver (140) and the cooling core part (210). In particular, an elastic member (300) is preferably interposed between the liquid receiver (140) that greatly varies in assembly during brazing and the second tank (230) on the opposite side. It is.
[0017]
In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description mentioned later.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
A first embodiment of the present invention is shown in FIGS. The dual heat exchanger 10 according to the present invention includes a condenser 100 that condenses a refrigerant (first fluid) of a vehicle air conditioner and a radiator 200 that cools cooling water (second fluid) of the vehicle engine. And is formed as an integral heat exchanger.
[0019]
The capacitor 100 includes a condensing core section (corresponding to the first core section of the present invention, hereinafter referred to as a core section) 110 and left and right header tanks (first tanks) 120 and 130.
[0020]
The core portion 210 includes tubes (first tubes) 111 formed by extrusion processing and fins 112 that are formed into a wave shape from a thin coil material alternately stacked in the vertical direction, and above and below the outermost fins 112. A capacitor side plate (hereinafter referred to as a side plate) 113 as a reinforcing member is provided. The upper and lower side plates 113 each have a U-shaped cross section having a side wall 113a, and the side wall 113a is provided with a plurality of bolt holes 113b for mounting a mounting bracket 400 described later.
[0021]
The left header tank 120 and the right header tank 130 are formed in a substantially cylindrical shape by extrusion. A plurality of tube holes (not shown) are provided on the surface of the header tanks 120, 130 on the side facing the core portion 110, and the left and right ends of the plurality of tubes 111 of the core portion 110 are fitted into the plurality of tubes. The inside of 111 and the inside of both header tanks 120 and 130 are communicated.
[0022]
The header tanks 120 and 130 are not limited to the above-described extruded products, and may be formed into a cylindrical shape by combining tank plates having a semicircular cross section formed by pressing.
[0023]
An inlet joint 121 and an outlet joint 122 through which refrigerant flows in and out of the left header tank 120 are provided, and a space in the left header tank 120 is provided between the joints 121 and 122. A separator (not shown) is arranged to divide.
[0024]
The right header tank 130 is provided with a cylindrical receiver 140 that is formed by extrusion and stores the condensed refrigerant therein and separates it into a gas-liquid two-phase. The header tank 130 communicates with the inside. That is, in the right header tank 130, a similar separator (not shown) is provided at the same vertical position as the separator in the left header tank 120, and the right header tank 130 divided by this separator is provided. The inner upper space and the lower space communicate with the interior of the liquid receiver 140, respectively.
[0025]
Each of the above members is made of an aluminum material or an aluminum alloy material, and is assembled as described above, and then integrally brazed to form the capacitor 100.
[0026]
The refrigerant flowing in from the inlet joint 121 is condensed from the upper space of the left header tank 120 toward the upper space of the right header tank 130, obtaining the heat radiation promotion effect of the fins 112 in the tubes 111 corresponding to both upper spaces. Then, it flows into the liquid receiver 140 and is separated into two phases of gas and liquid. From the lower space of the right header tank 130 to the lower space of the left header tank 120 so that only the liquid refrigerant makes a U-turn, The tube 111 is further subcooled by the tube 111 group corresponding to the side space, and flows out from the outlet joint 122.
[0027]
Next, the radiator 200 will be described. The radiator 200 has the same structure as the capacitor 100, and includes a cooling core part (corresponding to the second core part of the present invention, hereinafter referred to as a core part) 210 and left and right tanks (second tanks) 220, 230.
[0028]
The core part 110 is configured such that tubes (second tubes) 211 and fins 212 are alternately stacked in the vertical direction, and radiator side plates (hereinafter, side plates) 213 are provided above and below the outermost fins 212. is there. Here, the tube 211 is formed into a flat cross section by a roller process from a thin coil material.
[0029]
Each of the upper and lower side plates 213 has a U-shaped cross section that opens to the side opposite to the core, and has two side walls 213a. The side wall 213a is provided with a plurality of bolt holes 213b for attaching a mounting bracket 400 described later.
[0030]
The left tank 220 and the right tank 230 are formed by bending a thin plate material into a box shape. The left and right ends of the respective tubes 211 of the core part 210 are fitted into a plurality of tube holes (not shown) provided on the surfaces of both tanks 220 and 230 facing the core part 210, and The inside and the insides of both tanks 220 and 230 communicate with each other.
[0031]
In both tanks 220 and 230, pipes (not shown) communicating with the interior are provided on the wall surface on the opposite side (downstream side of the external air flow) of the condenser 100.
[0032]
Each of the above members is made of an aluminum material or an aluminum alloy material, and after being assembled as described above, is integrally brazed to form the radiator 200.
[0033]
The cooling water flowing out from the engine flows through the tube 211 of the core part 210 from one pipe and flows out from the other pipe, and heat radiation is promoted by the fins 212 when flowing through the tube 211. To be cooled.
[0034]
In the capacitor 100 and the radiator 200 formed in this way, the longitudinal directions of the tubes 111 and 211 are the same, and the core portions 110 and 210 are in series with the flow direction of the external air. The multiple heat exchanger 10 is formed by being connected and fixed to each other by a bolt 500 inserted into the bolt holes 113b and 213b via a mounting bracket 400 having a pin portion 410 serving as a mounting portion on the vehicle side.
[0035]
Then, both side plates 113 and 213 are located on the upper side and the lower side, and the condenser 100 is located in front of the radiator 200 (on the upstream side of the air flow) via the pin portion 410 in front of the engine room of the vehicle. To be mounted on.
[0036]
Next, the main part of the present invention will be described. The parts that are close to each other in the outer region of the core parts 110 and 210, that is, here, the liquid receiver 140 of the capacitor 100 and the right tank 230 of the radiator 200 that cause the largest assembly variation during brazing. A packing 300 as an elastic member is interposed between the gaps (gap).
[0037]
The packing 300 is made of a urethane material having low thermal conductivity, and is provided (separated) on the mutually opposing surfaces of the liquid receiver 140 and the right tank 230, and bonded to the surfaces. And when the capacitor | condenser 100 and the radiator 200 are assembled | attached, the anti-adhesion side of both packing 300 is mutually compressed, and it is trying to contact | abut. Moreover, the packing 300 is provided discretely (here, three places) along the gap between the liquid receiver 140 and the right tank 230.
[0038]
Accordingly, the liquid receiver 140 and the right tank 230 that are close to each other are not directly contacted by the packing 300, and the heat transfer between the liquid receiver 140 and the right tank 230 due to the low thermal conductivity of the packing 300. Is prevented, and a decrease in the heat exchange capability of the core portion 110 of the capacitor 100 that is normally on the low temperature side can be prevented. Specifically, the liquid receiver 140 is heated to a high temperature due to heat transfer, and the internal pressure is increased, so that the condensed refrigerant can be prevented from staying in the core portion 110, and the refrigerant condensing capacity can be prevented from being lowered.
[0039]
Here, since only the packing 300 is interposed to provide the above function, it can be easily handled. In addition, since the packing 300 is discretely provided along the gap between the liquid receiver 140 and the right tank 230, the compression reaction force of the packing 300 between them is not increased unnecessarily, and the capacitor 100 and the radiator 200 Assembling becomes easy.
[0040]
Here, by adhering the packing 300 to the respective surfaces of the liquid receiver 140 and the right tank 230, it is possible to prevent water or the like from the outside from entering between the packing 300 and the adhesive surface. A reduction in corrosion resistance can be prevented.
[0041]
Further, since the packing 300 is divided and bonded to the liquid receiver 140 and the right tank 230, even if a relative movement occurs between the capacitor 100 and the radiator 200 due to a vibration load of the vehicle, for example, stress is applied to the bonded portion. There is no such thing and peeling of packing 300 can be prevented.
[0042]
(Other embodiments)
In the case where the condenser 100 does not have the liquid receiver 140, or in the outer regions of the core portions 110 and 210 of the condenser 100 and the radiator 200, the portions that are close to each other are the left header tank 120 and the left tank 220 or the right header tank. In the case of 130 and the right tank 230, the packing 300 may be interposed between the tanks 120, 220, 130, and 230.
[0044]
Further, the material of the packing 300 is not limited to the urethane material, and may be other rubber material or the like as long as it has low heat conduction and elasticity.
[0045]
Further, the packing 300 may be continuously provided along the portions close to each other in the outer region of both the core portions 110 and 210 according to the compression reaction force when the capacitor 100 and the radiator 200 are assembled. . According to this, a duct effect is obtained in which the gap between the capacitor 100 and the radiator 200 is closed to prevent leakage of external air.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an overall configuration of a dual heat exchanger according to a first embodiment of the present invention.
FIG. 2 is a view taken in the direction of an arrow A in FIG.
[Explanation of symbols]
10 Duplex heat exchanger 110 Condensation core (first core)
111 tube (first tube)
130 Right header tank (first tank)
140 Liquid receiver (proximity part)
210 Cooling core (second core)
211 tube (second tube)
230 Right tank (proximity part, second tank)
300 Packing (elastic member)

Claims (3)

A first core (110) having a plurality of first tubes (111) stacked, and performing heat exchange between external air and a first fluid flowing through the first tube (111);
A plurality of second tubes (211) stacked, and a second core portion (210) for exchanging heat between the external air and a second fluid flowing through the second tube (211),
The longitudinal direction of the first tube (111) and the second tube (211) is the same, and the first core part (110) and the second core part (210) flow of the external air. In the dual heat exchanger arranged in series with respect to the direction,
Wherein between the parts (140,230) mutually close to each other in the outer area of the first core portion (110) and said second core portion (210), an elastic member (300) of low thermal conductivity is interposed And
The elastic member (300) is bonded to each surface of the portions (140, 230) that are close to each other, and is divided at an intermediate position between the portions (140, 230) that are close to each other,
The double heat exchanger according to claim 1, wherein the non-bonding sides of the elastic member (300) are compressed and come into contact with each other . The dual heat exchanger according to claim 1 , wherein the elastic member (300) is discretely provided along the mutually adjacent portions (140, 230). The first core part (110) is a condensing core part (110) for liquefying and condensing refrigerant in the refrigeration cycle as the first fluid,
The second core part (210) is a cooling core part (210) for cooling engine coolant as the second fluid,
A liquid receiver (140) that stores the refrigerant and separates gas and liquid is provided on the side opposite to the core of the first tank (130) connected to the condensation core (110),
The said adjacent part (140,230) is the 2nd tank (230) connected to the said liquid receiver (140) and the said cooling core part (210), The Claim 1 or Claim characterized by the above-mentioned. 2. A dual heat exchanger according to 2 .

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