JP4078180B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an independent temperature control type vehicle air conditioner including a plurality of independent passages.
[0002]
[Prior art]
In a vehicle air conditioner, an evaporator as a heat exchanger for cooling, a heater core as a heat exchanger for heating, and an air mix door are arranged in a unit case that forms an air passage inside, and from the evaporator with the air mix door Distributes and controls the amount of cool air that passes through the heater core and the amount of cool air that bypasses the heater core from the evaporator, and mixes the warm air that passed through the heater core and the cold air that bypassed the heater core in the downstream air mix chamber. In some cases, the conditioned air at a desired temperature is blown out into the passenger compartment. The air mix chamber is provided with a defroster outlet passage, a vent outlet passage, and a foot outlet passage, and is blown out from a desired outlet passage by opening / closing control of a mode switching door that selectively switches the outlet passage.
[0003]
This type of vehicle air conditioner has a structure in which the temperature is controlled independently, for example, on the driver's seat side and the passenger seat side (for example, Patent Document 1).
[0004]
12 to 14 are conventional examples of vehicle air conditioners capable of independent temperature control. As shown in FIG. 12, the partition plate 103 incorporated in the unit case C made up of the divided cases C1 and C2 divides the wake passage on the wake side into a plurality of parts, and each can independently control the temperature in the passages. It is like that.
[0005]
Here, among the components incorporated in the unit case C, the heater core 102 is disposed over the entire width of the air passage across the partition plate 103 as shown in FIG. 14d. The heater core 102 is detachable from the unit case C from the viewpoint of serviceability. That is, as shown in FIG. 14, the heater core 102 is detachable from the unit case C through the insertion opening 105 of the unit case C and the insertion opening 104 of the partition plate 3.
[0006]
[Patent Document 1]
JP 2001-253223 A
[Problems to be solved by the invention]
However, in the structure in which the heater core 102 is detachable through the insertion opening 105 of the unit case C and the insertion opening 104 of the partition plate 103 as described above, the insertion opening 104 of the partition plate 103 and the heater core 102 are inserted when the heater core 102 is inserted. There is a possibility that the seal portion 110 (111, 112) for sealing the gap interferes with the peripheral edge of the insertion opening 104 and is lost, and the sealing performance is impaired, or the seal member 110 (111, 112) may be peeled off depending on the case. In particular, as shown in FIG. 13, when the end portions 111a and 112a of the seal members 112 and 113 are bent at the corner portions, the bent end portions 111a and 112a are easily peeled off by the elastic reaction force. . Reference numeral 115 denotes a seal member attached to the insertion tip portion 102B of the heater core 102, which seals a gap between the insertion tip portion 102B and the cylindrical support portion 107 that receives and supports the insertion tip portion 102B. It is. Reference numeral 116 denotes a seal member attached to the insertion rear end portion 102C of the heater core 102, and seals a gap between the insertion rear end portion 102C and the cylindrical support portion 106 of the insertion opening 105. .
[0008]
The present invention has been made on the basis of such a conventional technique. The object of the present invention is to insert a heat exchanger arranged over a plurality of independent passages through an insertion opening of a unit case and an insertion opening of a partition plate. In a vehicular air conditioner that is detachable, an object is to provide a vehicular air conditioner that can reliably seal between the insertion opening of a partition plate and a heat exchanger.
[0009]
[Means for Solving the Problems]
In the invention according to claim 1, in the unit case that forms the air passage along the both side walls, a partition plate that divides the air passage into a plurality of independent passages is provided to enable independent temperature control. An insertion opening is provided in each of the one side wall and the partition plate, and a heat exchanger arranged over a plurality of independent passages can be inserted and removed through the insertion opening of the unit case and the insertion opening of the partition plate, and the heat exchange In a vehicle air conditioner provided with a seal member that seals between the insertion opening of the partition plate and the core portion of the heat exchanger located in the insertion opening at a predetermined mounting position of the vessel,
The insertion opening of the partition plate is provided with an insertion guide surface having a taper cross section that is formed so as to gradually widen from the seal surface and guides the heat exchanger.
[0010]
Further, in the first aspect of the present invention, a support portion that receives the insertion tip of the heat exchanger and supports the heat exchanger at a predetermined mounting position is provided on the other side wall of the unit case, and the support A guide surface is provided at a distal end portion of the portion to contact the insertion distal end portion of the heat exchanger and guide it toward a predetermined mounting position before the seal member contacts the insertion guide surface. To do.
[0011]
In the second aspect of the invention, the vehicular air conditioning apparatus according to claim 1, said sealing member, a first seal portion which is attached to the upper end surface of the core portion of the heat exchanger, under the core portion A second seal portion attached to the end surface, a third seal portion attached to the front surface of the core portion in the ventilation direction, and a fourth seal portion attached to the rear surface of the core portion in the ventilation direction are divided and formed. The upper and lower ends of the seal portion and the fourth seal portion are set to be flush with the upper and lower end surfaces of the first seal portion seal portion and the second seal portion.
[0012]
【The invention's effect】
According to the first aspect of the present invention, when the heat exchanger is inserted, the insertion guide surface contacts and guides the seal member attached to the heat exchanger. It is possible to prevent an overload from being caught on the insertion tip surface of the member. When the heat exchanger is inserted, the inclined guide surface first guides the insertion tip of the heat exchanger. Thereby, there also exists an advantage which can insert a heat exchanger smoothly through the insertion opening of a partition plate.
[0013]
Further, according to the first aspect of the present invention, in addition to the above effects, inserting a heat exchanger, the guide surface at the mounting position immediately before the heat exchanger contacts the insertion tip of the heat exchanger. And since this guide surface guides the heat exchanger toward the predetermined mounting position before the seal member comes into contact with the insertion guide surface, the heat exchanger faces the heat exchanger, so that the seal member is overloaded. This can be reliably prevented.
[0014]
According to the invention described in claim 2 , in addition to the effect of the invention described in claim 1 , the seal member is provided on the first seal portion attached to the upper end surface of the core portion of the heat exchanger and the lower end surface of the core portion. The second seal portion provided, the third seal portion attached to the front surface in the ventilation direction of the core portion, and the fourth seal portion attached to the rear surface in the ventilation direction of the core portion, the third seal portion and Since the upper and lower end surfaces of the fourth seal portion are set so as to be flush with the upper and lower end surfaces of the first seal portion and the second seal portion, the conventional bending end portions of the seal member are not formed. Therefore, the seal member itself has a structure that is difficult to peel off, and a reliable sealing performance can be exhibited.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view showing the vehicle air conditioner of this embodiment, FIG. 2 is an exploded perspective view of a unit case of the air conditioning unit of the vehicle air conditioner, and FIG. 3 is incorporated in the unit case of the vehicle air conditioner. FIG. 4 is a cross-sectional view taken along line SA-SA in FIG. 1, FIG. 5 is a perspective view showing a heater core incorporated in the dual-purpose air conditioner, FIG. 6a is a top view of the heater core, and FIG. 6b is a heater core. 6c is a bottom view of the heater core, FIG. 7 is a sectional view taken along the line SC-SC in FIG. 4 showing the process of inserting the heater core into the unit case, and FIG. 8 is an explanatory view showing the action of the guide surface. 9 is an enlarged view of portion A in FIG. 7, FIG. 10 is an enlarged view of portion B in FIG. 7, and FIG. 11 is an enlarged view of portion C in FIG.
[0016]
First, the basic structure of the vehicle air conditioner of this embodiment will be described with reference to FIGS. As shown in FIG. 1, the vehicle air conditioner includes an intake box 70 that selectively introduces inside and outside air, a blower 80 that sends air from the intake box 70 to the downstream, and temperature control of the air from the blower 80. The temperature control unit 1 according to this embodiment is an integrated temperature control unit 1 in which a heater unit and a cooler unit are integrally formed.
[0017]
Hereinafter, the temperature control unit 1 will be described in detail mainly with reference to FIG.
[0018]
The temperature control unit 1 includes an evaporator 5 as a heat exchanger for cooling and an air mix door device 6 in a unit case 2 (see FIGS. 1 and 2) formed by combining divided cases 2a and 2b with a partition plate 3 interposed therebetween. And a heater core 7 as a heat exchanger for heating.
[0019]
The unit case 2 has an introduction port 8, and a defroster outlet 9, a vent outlet 10, and a foot outlet 11 for blowing out air introduced from the introduction port 8 and adjusted in temperature in the air passage. ing. As a result, air blown from the blower 80 is introduced into the unit case 2 from the introduction port 8, directed to the side walls 30 </ b> A and 30 </ b> B of the case 2, and flows downstream along the side walls 30 </ b> A and 30 </ b> B. , Are selectively blown out from the air outlets 9, 10, 11.
[0020]
The defroster outlet 9 blows out conditioned air toward the vehicle front window glass. The vent outlet 10 includes a center vent outlet 10A at the center of the vehicle and side vent outlets 10B at both sides of the vehicle. The center vent (not shown) disposed toward the occupant's chest in the center vent outlet 10A. A duct is connected, and the side vent outlet 10B is connected to a side vent duct (not shown) disposed toward the vehicle side window glass, and blows air-conditioned air toward the passenger chest and the vehicle side window glass. . The foot outlet 11 is connected to a front foot duct and a rear foot duct (not shown) that are arranged toward the passenger's feet, and blows air-conditioned air toward the passenger's feet.
[0021]
The evaporator 5 is interposed in a refrigeration cycle (not shown) and circulates a low-temperature and low-pressure refrigerant inside to absorb heat, and the heater core 7 is interposed in a hot water line (not shown). The engine cooling water, which has become high temperature due to exhaust heat from the engine, generates heat using the heat source.
[0022]
The air mix door device 6 is disposed on the downstream side of the evaporator 5 and on the upstream side of the heater core 7, and includes an air mix door 62 in the door case 61. The door case 61 includes a cold air introduction portion 63 on the upstream side, an outlet 65 of a heater core side passage 64 that allows the cold air from the evaporator 5 to flow through the heater core 7 in a substantially lower half portion on the downstream side, and a substantially upper portion on the downstream side. An outlet 67 of a bypass passage 66 for bypassing the cold air from the evaporator 5 to the heater core 7 is provided in the half portion. The air mix door 62 is slid up and down across the outlet 65 of the heater core side passage 64 and the outlet 67 of the bypass passage 66 so as to distribute the introduction of cold air to the bypass passage 66 and the heater core side passage 64. It has become.
[0023]
A longitudinal wall portion 31 is provided in the wake portion of the heater core 7 disposed in the vicinity of the outlet 65 of the heater core side passage 64, and the vertical temperature that causes the warm air that has passed through the heater core 7 to flow upwards. An air passage 12 is formed.
[0024]
The outlet 13 of the hot air passage 12 is provided adjacent to the outlet 67 of the bypass passage 66, and the confluence portion of the outlets 13 and 67 is set as an air mix chamber 14 for mixing the cold air and the hot air. ing.
[0025]
The air mix chamber 14 includes an inlet 16 of a foot outlet passage 15 that communicates with the foot outlet 11, an inlet 18 of a vent outlet passage 17 that communicates with the vent outlet 10, and a defroster outlet passage that communicates with the defroster outlet 9. 19 inlets 20 are provided. A defroster door 21 for opening and closing the defroster outlet passage 19 is provided at the inlet 20 of the defroster outlet passage 19, and these inlets 16, 18 are provided at a branch point between the foot outlet passage 15 and the vent outlet passage 17. A vent foot door 22 for selectively opening and closing is provided. The blowing mode can be selected by the doors 21 and 22 for switching the blowing mode. Reference numeral 23 denotes a so-called composite mode door.
[0026]
And the temperature control unit 1 of this embodiment is the left-right independent temperature control unit 1 which can adjust independently the blowing temperature of a driver's seat side and a passenger's seat side, respectively, and as shown in FIG. 6 is divided into two independent passages (driver seat side passage P1 and passenger seat side passage P2) by a partition plate 3 (see FIG. 7), and two air mixes are driven independently corresponding to each passage. Doors 62 and 62 are provided so that the blowing temperature can be adjusted independently on the driver's seat side and on the passenger seat side.
[0027]
Now, in the vehicle air conditioner of this embodiment, the heater core 7 can be mounted in the unit case 2 after the unit case 2 is assembled. Specifically, as illustrated in FIG. 2, insertion openings 32 and 33 are provided in the side wall (one side wall) 30 </ b> B and the partition plate 3 of the unit case 2, respectively. The heater core 7 can be inserted into and removed from the unit case 2 through the insertion opening 33 (see FIG. 7). The insertion openings 32 and 33 have the same shape.
[0028]
More specifically, the heater core 7 is inserted into the unit case 2 from one tank portion 72 as an insertion tip as shown in FIG. 7, and the mounting position of the heater core 7 (FIG. 7d). Then, the tank part 72 as the insertion tip part is located in the cylindrical support part 35 projecting from the side wall (the other side wall) 30 </ b> A of the unit case 2, and the tank part 73 that becomes the insertion rear end part 73 of the heater core 7. Is located in a cylindrical support portion 36 protruding from the periphery of the insertion opening 32 of the side wall (one side wall) 30B of the unit case 2. The central portion of the core portion 71 of the heater core 7 is located in the insertion opening 33 of the partition plate 3.
[0029]
Here, as shown in FIG. 5 and FIG. 6, the heater core 7 has a core portion 71 ventilation direction front surface 71 a and a core portion so that the conditioned air flowing through the core portion 71 of the heater core 7 surely flows through the core portion 71. 71. Seal members 41 and 42 are attached to portions excluding the rear surface 71b in the ventilation direction, that is, the upper end surface 71c of the core portion 71, the lower end surface 71d of the core portion 71, and the tank portions 72 and 73. Actually, the seal member 41 attached around the core portion 71 upper end surface 71c → tank portion 72 side surface (insertion end surface) → core portion 71 lower end surface 71d and the tank portion 73 as the insertion rear end portion. A gap is sealed between the passage and the heater core 7 by a sealing member 42 attached around the upper surface → the front surface → the lower surface → the rear surface. Of course, the sealing member 42 also serves to prevent the conditioned air from leaking from the insertion opening 32 to the outside of the unit case 2 by sealing the gap between the tank portion 73 as the rear end portion of the insertion and the insertion opening 32. (See Figure 7)
[0030]
In order to prevent the conditioned air from going back and forth between the independent passages P1 and P2 through the insertion opening 33 of the partition plate 3, a seal member S that seals between the insertion opening 33 and the core part 71 is provided in the core part. 71 is provided so as to go around the central portion. The seal member S includes an upper surface portion 45 central portion 45a (first seal portion) of the seal member 41, a lower surface portion 47 central portion 47a (second seal portion) of the seal member 41, and a ventilation direction of the core portion 71. A seal member 43 (third seal portion) attached to the front surface and a seal member 44 (fourth seal portion) attached to the rear surface of the core portion 71 in the ventilation direction are configured. The sealing member 41 is formed to have the same width as the thickness of the core portion 71 in the ventilation direction, and the upper ends 43t and 44t of the third seal portion 43 and the fourth seal portion 44 are flush with the upper end surface of the first seal portion 45a. The lower ends 43b and 44b of the third seal portion 43 and the fourth seal portion 44 are set to be flush with the lower end surface of the second seal portion 47a. In addition, since the heater core 7 is formed such that the thickness of the core portion 71 in the ventilation direction is thinner than the tank portions 72 and 73, the seal member S includes the third seal portion 43 and the fourth seal portion 44, and the first seal portion 45 a and It is set to be thicker than the second seal portion 47a.
[0031]
Here, in this embodiment, the sealing member S is prevented from being caught at the periphery of the insertion opening 33 of the partition plate 3 when the heater core 7 is inserted, and the sealing performance of the sealing member S at the attachment position of the heater core 7 is prevented. Therefore, the following devices have been made.
[0032]
First, as shown in FIGS. 7 to 9, an insertion guide surface 33 b having a tapered cross section formed gradually wider from the seal surface 33 a is provided on the peripheral edge of the insertion opening 33 of the partition plate 3. The insertion guide surface 33b is preferably inclined by 35 ° to 45 ° with respect to the insertion direction. In this embodiment, the insertion guide surface 33b is inclined by 45 °.
[0033]
Secondly, as shown in FIG. 8, the heater core is brought into contact with the insertion tip 72 at the tip of the cylindrical support wall 35 that receives the insertion tip 72 of the heater core 7 and positions the heater core 7 at a predetermined mounting position. A guide surface 35a for guiding 7 toward a predetermined mounting position is provided. The guide surface 35a contacts the insertion tip 72 of the heater core 7 and guides the heater core 7 toward a predetermined mounting position before the seal member S contacts the insertion guide surface at the periphery of the insertion opening 33 of the partition plate 3. To do.
[0034]
Such a vehicle air conditioner has the following effects.
[0035]
First, since the insertion guide surface 33b that is gradually widened from the seal surface 33a is provided in the insertion opening 33 of the partition plate 3, the insertion guide surface 33b causes the seal member S to be caught by the insertion tip surface. Can be prevented (see FIGS. 7c and 7d). When the heater core 7 is inserted, first, as shown in FIGS. 7b and 9, the insertion tip 72 of the heater core is guided by the inclined guide surface 33b. Thereby, there is also an advantage that the heater core 7 can be smoothly inserted through the insertion opening 33 of the partition plate 3.
[0036]
Secondly, as shown in FIG. 8, before the seal member S contacts the insertion guide surface 33b, the guide contacts the insertion tip 72 of the heater core 7 and guides the insertion tip 72 to a predetermined mounting position. Since the surface 35 a is provided at the tip of the cylindrical support wall 35 of the side wall 30 </ b> A of the unit case 2, the guide surface 35 a comes into contact with the insertion tip 72 of the heater core 7 immediately before the predetermined mounting position of the heater core 7. And since this guide surface 35a guides the heater core 7 toward a predetermined mounting position before the seal member S comes into contact with the insertion guide surface 3b, the seal member S is overloaded. Can be prevented more reliably.
[0037]
Thirdly, the seal member S includes a first seal portion 45 a attached to the upper end surface of the core portion 71 of the heater core 7, a second seal portion 47 a attached to the lower end surface of the core portion 71, and the core portion 71. The third seal portion 43 attached to the front surface in the ventilation direction and the fourth seal portion 74 attached to the rear surface in the ventilation direction of the core portion 71 are divided into upper and lower portions of the third seal portion 43 and the fourth seal portion 44. Since the terminals 43t, 43b, 44t, and 44b are set to be flush with the upper and lower end surfaces of the first seal portion 45a and the second seal portion 47a, the seal members 111 and 112 of the conventional heater core 102 in FIG. The terminal does not have the bent portions 111a and 112a that are easily peeled off by the bending reaction force. Therefore, the seal member S itself has a structure that is difficult to peel off, and a reliable sealing property can be exhibited.
[0038]
Fourth, since the third seal portion 45a and the fourth seal portion 47a are formed by the single seal member 41 via the connecting portion 46 located on the insertion tip surface of the heater core 7, there is an advantage that the number of parts can be reduced. is there.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a vehicle air conditioner according to an embodiment.
FIG. 2 is an exploded perspective view of a unit case of a temperature control unit of the vehicle air conditioner.
FIG. 3 is a perspective view showing the vicinity of a partition plate of the vehicle air conditioner.
4 is a cross-sectional view taken along the line SA-SA in FIG.
FIG. 5 is a perspective view showing a heater core incorporated in the dual-purpose air conditioner.
6A and 6B are diagrams showing a heater core incorporated in the dual-purpose air conditioner, in which FIG. 6a is a top view of the heater core, FIG. 6b is a rear view of the heater core, and FIG. 6c is a bottom view of the heater core.
7 is a cross-sectional view taken along the line SC-SC in FIG. 4 showing a process of inserting a heater core into the unit case.
FIG. 8 is an explanatory view showing the action of the guide surface.
FIG. 9 is an enlarged view of a portion A in FIG.
FIG. 10 is an enlarged view of a portion B in FIG.
11 is an enlarged view of a portion C in FIG.
FIG. 12 is an exploded perspective view of a unit case of a conventional vehicle air conditioner.
FIG. 13 is a perspective view of a heater core incorporated in the conventional vehicle air conditioner.
FIG. 14 is an explanatory diagram of a process for inserting and attaching a heater core to a unit case of the conventional vehicle air conditioner.
[Explanation of symbols]
1 Temperature control unit 2 Unit case 3 Partition plate 7 Heater core (heat exchanger)
30A Other side wall 30B One side wall 32 Unit case insertion opening 33 Partition plate insertion opening 33a Seal surface 33b Insertion guide surface 35 Support portion 35a Guide surface 43 Third seal portion 44 Fourth seal portion 45a First seal portion 47a First 2 seal part 71 core part 72 tank part (insertion tip part)
73 Tank (rear end)
P1 Driver's seat side passage (passage)
P2 Passenger seat side passage (passage)
S Seal member

Claims (2)

In the unit case (2) that forms the air passage along the both side walls (30A, 30B), the partition plate 3 that divides the air passage into a plurality of independent passages (P1, P2) is provided to enable independent temperature control, A heat exchanger (7) arranged across a plurality of independent passages (P1, P2) by providing insertion openings (32, 33) in one side wall (30B) of the unit case 2 and the partition plate 3, respectively. The partition plate (3) can be inserted / removed through the insertion opening (32) of the unit case (2) and the insertion opening (33) of the partition plate (3) at a predetermined mounting position of the heat exchanger (7). In the vehicle air conditioner provided with a seal member (S) for sealing between the insertion opening (33) and the core portion (71) of the heat exchanger (7) located in the insertion opening (33),
The insertion opening (33) of the partition plate (3) is provided with an insertion guide surface (33b) having a taper cross section formed so as to be gradually widened from the seal surface (33a) and guiding the heat exchanger (7) .
A support portion (35) for receiving the insertion tip (72) of the heat exchanger (7) and supporting the heat exchanger (7) at a predetermined mounting position is provided on the other side wall (30A) of the unit case (2). Provided in
Before the seal member (S) comes into contact with the insertion guide surface (33), the tip of the support (35) comes into contact with the insertion tip (72) of the heat exchanger (7) to be predetermined. A vehicle air conditioner provided with a guide surface (35a) for guiding toward the mounting position. The vehicle air conditioner according to claim 1 ,
The seal member (S) includes a first seal portion (45a) attached to the upper end surface of the core portion (71) of the heat exchanger (7) and a second seal portion attached to the lower end surface of the core portion (71). A seal portion (47a), a third seal portion (43) attached to the front surface in the ventilation direction of the core portion (71), and a fourth seal portion (44) attached to the rear surface in the ventilation direction of the core portion (71). The upper and lower ends of the third seal portion (43) and the fourth seal portion (44) are flush with the upper and lower end surfaces of the first seal portion seal portion (45a) and the second seal portion (47a). An air conditioner for a vehicle, characterized in that it is set to be.

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