JP2004182023A - Heat exchanger installation structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger installation structure by work that reduces equipment cost without requiring complicated manual work. <P>SOLUTION: The heat exchanger 7 installation structure is constituted so as to block up an inserting opening 11 by the end of a heat exchanger 7 by inserting the heat exchanger 7 into a case 1 from the inserting opening 11 formed in the case 1 for forming an air passage. A seal member 13 is arranged in the inserting opening 11, and the seal member 13 is put in a pressure contact state with the end peripheral edge 75 of the heat exchanger 7 when the heat exchanger 7 is installed in the case 1. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat exchanger mounting structure in which a heat exchanger such as a heater core is mounted on a case forming an air passage in an air conditioner.
[0002]
[Prior art]
Conventionally, in an air conditioner, a heat exchanger such as a heater core is inserted into a case through an insertion opening provided in an air passage forming case, and the heat exchanger is configured to close the insertion opening with an end of the heat exchanger. The mounting structure of the exchanger is such that a seal member is attached to the end of the heater core over the entire circumference, and the annular seal member is pressed against the insertion opening so that air inside the case passes through the insertion opening. The sealing property is ensured so as not to leak out (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-8-42989 (
FIG. 7)
[0004]
[Problems to be solved by the invention]
However, according to the above-described conventional technology, when the work of attaching the seal member to the end of the heater core over the entire circumference is performed manually, a complicated work is forced. However, there is a problem that a large equipment cost is required.
[0005]
The present invention has been made in view of the above-described problems of the related art, and provides a mounting structure of a heat exchanger that can be obtained by a work that can achieve a reduction in equipment cost without complicated manual work. With the goal.
[0006]
[Means for Solving the Problems]
The mounting structure for a heat exchanger according to claim 1, wherein the heat exchanger is inserted into the case through an insertion opening provided in a case forming an air passage, and the heat exchanger is inserted by an end of the heat exchanger. In a heat exchanger mounting structure configured to close an opening, a seal member is formed in the insertion opening, and the seal member is attached to the heat exchanger when the heat exchanger is mounted on the case. Characterized in that it comes into pressure contact with the peripheral portion of the end.
[0007]
According to the heat exchanger mounting structure of the first aspect, since the seal member is formed on the case side, there is no need to perform the operation of attaching the seal member to the end of the heat exchanger over the entire circumference, Since the seal member can be formed at the same time as the case is formed, the facility cost can be reduced without complicated manual work.
[0008]
According to the mounting structure of the heat exchanger according to claim 2, since the seal member is molded at the time of molding the case using the molding die of the case, it does not involve complicated manual work and reduces equipment costs. Can be achieved.
[0009]
According to the mounting structure of the heat exchanger according to the third aspect, since the insertion opening has the projection penetrating the seal member, the projection exerts an action of anchoring the seal member to the insertion opening. Thus, the degree of coupling between the sealing member and the insertion opening is improved.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is a schematic configuration diagram of an automotive air conditioner in which a heat exchanger mounting structure according to an embodiment of the present invention is incorporated. FIG. 2 is a diagram illustrating an insertion operation of inserting a heater core from an insertion opening. FIG. 3 is a perspective view, FIG. 3 is a cross-sectional view of a main part showing a state in which the heater core is pressed against the seal member when the heater core is attached to the case, and FIG. 4 is a molding process diagram of the seal member.
[0012]
In FIG. 1, reference numeral 1 denotes a case made of resin, for example, PP (polypropylene). Inside the case 1, a motor 2 with a blower for sucking air into the case 1 and blowing out the air after heat exchange into the vehicle is arranged. An internal air intake 3 for taking in the vehicle air into the case 1 and an external air intake 4 for taking the outside air into the case 1 are formed in a case portion on the upstream side of the blower motor 2. The air intakes 3 and 4 are selectively opened and closed by an inside / outside air door 5, and the inside or outside air selected by the inside / outside air door 5 is taken into the case 1. An evaporator 6 that forms a part of a refrigeration cycle, cools air by exchanging heat with refrigerant, and produces cool air is disposed downstream of the blower-equipped motor 2. A heater core 7 that heats cold air by heat exchange with engine cooling water to generate hot air is disposed in a part of the air passage downstream of the evaporator 6. An air mixing door 8 is disposed at an intermediate portion between the heater core 7 and the evaporator 6. The air mixing door 8 is configured to separate the cold air guided from the evaporator 6 to the heater core 7 and the cold air guided to the heater core 7 by the opening degree. It is a door for adjusting the ratio of the cool air guided to the detour passage 9 to be detoured. A foot outlet 10, a face outlet 11, and a defroster outlet 12 are formed in a case portion on the downstream side of the heater core 7. The foot outlet 10 and the face outlet 11 are air outlets for blowing air after heat exchange toward the vicinity of the feet and the face of the occupant, respectively, and the defroster outlet 12 uses the air after heat exchange for the windshield. This is the air outlet that blows out toward. At the foot outlet 10, the face outlet 11, and the defroster outlet 12, a foot door 13, a face door 14, and a defroster door 15 for adjusting the amount of air to be blown out are arranged, respectively.
[0013]
As shown in FIG. 2, the heater core 7 includes a pair of tank portions 71, 71, and a core portion 72 located between the two tank portions 71, 71 for exchanging heat between engine cooling water and air. The core portion 72 includes a plurality of flat tubes 73 arranged in parallel with each other and interconnecting the internal spaces of the tank portions 71, 71, and a radiation fin 74 disposed between the adjacent flat tubes 73, 73. The heat radiation fins 74 are also provided between the outermost flat tube 73 and the side plate 75. Each tank unit 71 has a tank body 76 and a lid 77 that closes both ends of the tank body 76, and introduces engine cooling water from the radiator side through a pipe 78 provided in the lid 77. The engine cooling water after the heat exchange is returned to the radiator side.
[0014]
As shown in FIG. 2, the case 1 has an insertion opening 11 for guiding the heater core 7 into the case 1 when the heater core 7 is assembled to the case 1. The insertion opening 11 has a peripheral wall portion 12 that forms a space corresponding to the planar shape of the heater core 7 (the external shape when the heater core 7 is viewed from the side plate 75 side). A seal member 13 is formed over the circumference. The seal member 13 is made of a soft material or packing, and when the heater core 7 is assembled to the case 1, the seal member 13 comes into pressure contact with the side plate 75 of the heater core 7 as shown in FIG. In this state, the air inside the case 1 is prevented from leaking outside through the insertion opening 11.
[0015]
Next, a method of forming the seal member 13 will be described with reference to FIG.
[0016]
As shown in FIG. 4A, a case molding cavity 103 is formed using three molds 100, 101, and 102, and a resin is formed in the case molding cavity 103 via a sprue, a runner, and a gate (not shown). For example, PP is injected, and the case 1 is injection molded. Then, as shown in FIG. 4 (B), one mold 100 is retracted by a predetermined distance to generate a cavity 104 for molding a seal member. , A one-part urethane foam is injected into the seal member molding cavity 104 while being foamed by being mixed with air by an injector. Thereby, the microcapsules in the urethane-based foam material are broken at the residual heat temperature of the material resin of the case 1 and the urethane-based foam material is hardened at about 80 ° C. by the hardening material inside the microcapsules, and the seal member 13 is formed. . Thereafter, the mold is opened and the product in which the seal member 13 is integrated with the case 1 is taken out.
[0017]
FIG. 5 is a cross-sectional view of a main part illustrating a pressed state between the seal member 13 and the heater core 7 according to a modification.
[0018]
In FIG. 5, a plurality of projections 16 are formed on the peripheral wall 12 of the insertion opening 11 of the case 1, and each projection 16 penetrates the seal member 13, respectively. An effect of mooring to the peripheral wall portion 12 is exhibited.
[0019]
Next, a method of forming the seal member 13 shown in FIG. 5 will be described with reference to FIG.
[0020]
As shown in FIG. 5A, a case molding cavity 103 is formed using three molds 100, 101, and 102, and a resin is formed in the case molding cavity 103 through a sprue, a runner, and a gate (not shown). For example, PP is injected, and the case 1 is injection molded. At this time, the case forming cavity 103 also forms a space 107 for forming the plurality of protrusions 106. Then, as shown in FIG. 5 (B), one mold 100 is retracted by a predetermined distance to generate a cavity 104 for molding a seal member. At this time, the cavity 104 for molding the seal member forms a space 108 surrounding the outer periphery of the projection 106 of the case 1. Then, when the temperature of the resin material of the case 1 is at a predetermined residual heat temperature without dropping, the one-component urethane-based foaming material is mixed with air by an injecting machine and foamed in the sealing member forming cavity 104 while being foamed. Inject into Thereby, the microcapsules in the urethane-based foam material are broken at the residual heat temperature of the material resin of the case 1 and the urethane-based foam material is hardened at about 80 ° C. by the hardening material inside the microcapsules, and the seal member 13 is formed. . Thereafter, the mold is opened, and the product in which the seal member 13 is integrated with the case 1 and the plurality of protrusions 106 penetrate the seal member 13 is taken out. Tethering the sealing member 13 to the peripheral wall portion 12 of the insertion opening 11 of the case 1 by the plurality of protrusions 106 in this way is effective when there is a problem in the joining property between the case 1 and the sealing member 13, for example, When the case 1 is made of PP and the sealing member 13 is made of urethane foam, it is preferable to mechanically couple the two.
[0021]
Although the above-described embodiment has been described as a heater core mounting structure, the present invention is not limited to this, and can be widely applied to a heat exchanger.
[0022]
As described above, in the heat exchanger mounting structure according to the present embodiment, the heat exchanger 7 is inserted into the case 1 through the insertion opening 11 provided in the case 1 forming the air passage, and heat exchange is performed. In the mounting structure of the heat exchanger 7 configured to close the insertion opening 11 with the end of the heat exchanger 7, a seal member 13 is formed in the insertion opening 11, and the heat exchanger 7 is formed of a case. When it is attached to the heat exchanger 1, it comes into pressure contact with the end peripheral portion 75 of the heat exchanger 7. As described above, since the seal member 13 is formed on the case 1 side, it is not necessary to attach the seal member 13 to the end of the heat exchanger 7 over the entire circumference. At the same time, the sealing member 13 can also be formed, and a reduction in equipment cost can be achieved without complicated manual work.
[0023]
Here, since the seal member 13 is molded at the time of molding the case 1 using the molding dies 100, 101, and 102 of the case 1, it is possible to achieve a reduction in facility costs without complicated manual work. .
[0024]
Further, since the insertion opening 11 has the projection 106 penetrating the seal member 13, the projection 106 exerts an action of anchoring the seal member 13 to the insertion opening 11, and the sealing member 13 and the insertion opening are provided. The degree of coupling with the part 11 is improved.
[0025]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the mounting structure of the heat exchanger of this invention, the mounting structure of a heat exchanger can be obtained by the operation | work which can achieve reduction of equipment cost without complicated manual work.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an air conditioner for a vehicle in which a heat exchanger mounting structure according to an embodiment of the present invention is incorporated.
FIG. 2 is a perspective view for explaining an insertion operation of inserting a heater core from an insertion opening.
FIG. 3 is a cross-sectional view of a main part showing a state in which a heater core is pressed against a seal member when the heater core is attached to a case.
FIG. 4 is a process chart of forming a seal member.
FIG. 5 is a cross-sectional view of a main part illustrating a pressed state of a seal member and a heater core according to a modified example.
6 is a process chart of forming the seal member shown in FIG. 5;
[Explanation of symbols]
Reference Signs List 1 case 11 insertion opening 106 projection 13 sealing member 7 heater core (heat exchanger)
75 Side plate (edge part)
100,101,102 Mold

Claims (3)

Attachment of a heat exchanger configured to insert a heat exchanger into the case through an insertion opening provided in a case forming an air passage and to close the insertion opening with an end of the heat exchanger. In the structure, a seal member is formed in the insertion opening, and the seal member comes into pressure contact with an end peripheral portion of the heat exchanger when the heat exchanger is attached to the case. Mounting structure of heat exchanger. The mounting structure for a heat exchanger according to claim 1, wherein the seal member is formed at the time of molding the case using a molding die for the case. The heat exchanger mounting structure according to claim 1, wherein the insertion opening has a protrusion penetrating the seal member.

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