JP4276861B2 - Mounting structure for vehicle air conditioning duct - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a vehicle air conditioning duct.
[0002]
[Prior art]
As a mounting structure for connecting ducts of an air conditioner for vehicles, a guide piece is attached to the side surface of one duct, the tip of the guide piece extends forward from the duct end face (duct connection port), and the guide piece and duct There is known a structure in which a gap is formed between the side surface of the other duct and the side surface of the other duct is applied to a guide piece and guided to a duct connection port (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-163047
[Problems to be solved by the invention]
However, depending on the arrangement of the peripheral components of the vehicle air conditioner, etc., the duct connection port and the guide piece provided on the side surface of the duct connection port may be hidden and cannot be visually recognized, and it is difficult to position the ducts. is there. Further, although the guide piece can restrict the relative position of the ducts in the left-right direction, it cannot restrict the relative position in the up-down direction. Therefore, if the relative position in the vertical direction is to be restricted, it is necessary to provide a similar guide piece on the lower surface of the duct, which increases the number of parts and increases the cost.
[0005]
The present invention has a structure different from the above-described prior art, and even when the duct connection port cannot be visually confirmed, the air-conditioning duct is securely positioned after being connected to the air-conditioning apparatus, and the relative positions of the air-conditioning ducts are not uniform. It is an object of the present invention to provide a vehicle air-conditioning duct mounting structure that is advantageous in securing the sealing performance by suppressing the above.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is an attachment structure of a vehicle air conditioning duct for attaching an air conditioning duct for supplying air conditioning air to a vehicle interior at a duct connection port of the vehicle air conditioner,
The air conditioning duct has a duct trunk portion having a connection portion connected to the duct connection port at an upstream end thereof, and two duct branch portions branched to the left and right from the downstream end of the duct trunk portion,
The air conditioner has a facing surface facing the duct trunk of the air conditioning duct on the near side in the connection direction of the air conditioning duct to the duct connection port,
A guide protrusion is formed on one of the facing surface of the air conditioner and the duct trunk of the air conditioning duct , and the other is slidably fitted to the guide protrusion and the connection portion of the air conditioning duct is connected to the duct. A guide groove for guiding to the connection port is formed ,
One of the guide protrusion and the guide groove formed in the duct trunk of the air-conditioning duct extends in a direction passing through a branched portion where the left and right duct branches are separated .
[0007]
Therefore, according to the present invention, a guide protrusion is formed on one of the air conditioner and the air conditioning duct, and on the other side, the guide protrusion is slidably fitted, and the connection portion of the air conditioning duct is connected to the air conditioning duct. Since the guide groove that guides to the duct connection port is formed, even if the duct connection port is not visible, the connection part of the air conditioning duct can be guided and connected to the duct connection port, This is advantageous in ensuring the sealing performance by suppressing the variation of the relative positions of each other, and can improve the working efficiency.
[0008]
The invention according to claim 2 is the mounting structure of the vehicle air conditioning duct according to claim 1 ,
The above branching portion of the upper Symbol conditioning duct has a connecting portion for reinforcing by connecting ducts branches of the right and left, for viewing the other of the guide protrusions and guide grooves in the connecting portion A peep hole is formed.
[0009]
Therefore, according to the present invention, the connecting portion of the air conditioning duct is formed with a peephole for visually recognizing the other of the guide protrusion and the guide groove formed in the air conditioner. The other of the guide ridge and the guide groove can be confirmed through the viewing hole, and the guide ridge can be securely fitted into the guide groove.
[0010]
The invention according to claim 3 is the mounting structure of the vehicle air conditioning duct according to claim 1 or 2,
The air-conditioning apparatus and the air-conditioning duct include a fastening portion for fastening each other with fastening parts in a state of being connected to each other.
[0011]
Therefore, according to the present invention, since the air conditioner and the air conditioning duct are connected to each other with the fastening parts, the relative positions can be prevented from being varied, and it is advantageous in securing the sealing performance. .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
As shown in FIG. 1, a vehicle air conditioner 1 according to an embodiment of the present invention is disposed inside an instrument panel 60 positioned at the foremost part in a vehicle interior of an automobile (vehicle). A unit 2 and a wind guide unit 3 are provided.
[0014]
The instrument panel 60 is provided with a front window defroster duct 63 and a ventilator 62 that blows out air-conditioned air to the center of the passenger compartment, the driver's seat side, and the passenger seat side. Air-conditioned air can also be sent to the feet and the feet of the rear seat passengers. Note that the automobile of the present embodiment is a so-called left-hand drive vehicle in which a driver seat and a passenger seat are provided on the left and right sides of the vehicle body, respectively.
[0015]
<Passage configuration of air conditioning unit 2>
As shown in FIGS. 2 and 3, the air conditioning case 4 constituting the air conditioning unit 2 includes a main body case portion 4A into which air is introduced from the air guide unit 3, and a drain connected to the lower opening of the main body case portion 4A. It comprises a case portion 4B and a duct assembly case portion 4C connected to the upper opening of the drain case portion 4B. The main body case portion 4A is configured by combining the left and right case members 4a and 4b, the drain case portion 4B is configured by one case member 75, and the duct assembly case portion 4C is configured by combining the left and right case members 70a and 70b. It is constituted by.
[0016]
The main body case portion 4A includes a fan housing 22 that forms a cylindrical space, an air feed passage 21 that extends downward from the fan housing 22, a cool air passage 30 that extends upward following the air feed passage 21, and the cold air passage. 30 and an air mix passage 35 extending upward. A blower fan 23 is housed in the fan housing 22 with its axis centered in the vehicle width direction, and an air mix damper 34 for switching a mixing ratio of cold air and hot air and an air-conditioning air blowing direction are switched in the air mix passage portion 35. Switching doors 39, 40, and 42 are provided.
[0017]
The drain case portion 4B has a bottom portion formed in a drain receiving portion 56 that receives the drain, and the upper surface of the drain case portion 4B is higher than the rear side as shown in FIG. The main body case portion 4A is connected to the opening portion on the upper surface front side of the drain case portion 4B, and the lower end opening portion of the duct assembly case portion 4C is connected to the opening portion on the rear upper surface side of the drain case 4B.
[0018]
An evaporator (cooling heat exchanger) 5 has its air inflow surface vertically between the portion between the air feed passage 21 and the cold air passage 30 in the main body case portion 4A and the drain receiving portion 56 of the drain case portion 4B. And disposed toward the rear of the vehicle body. An air filter 29 is provided on the front side (front side of the vehicle body) of the evaporator 5, and an air volume adjusting device 20 is provided on the front side of the filter 29.
[0019]
The upper part on the rear side when the upper surface of the drain case part 4B is raised one step is formed in a heater core housing part 8 in which a heater core (heating heat exchanger) 6 is housed with its air inflow surface substantially horizontal and downward. ing. The duct assembly case portion 4 </ b> C is located above the heater core 6 and forms a hot air passage 31. A partition wall 7 that distributes the air that has passed through the evaporator 5 to the cold air passage 30 side and the drain case portion 4B (heater core 6) side is formed in the main body case portion 4A with the wall surface extending in the vertical direction.
[0020]
A lower portion of the air mix passage 35 of the main body case portion 4A is formed at a junction of the cold air passage 30 and the hot air passage 31, and an air mix damper 34 is disposed at the junction. The air mix damper 34 has two blades connected in a “<” shape, and the central part of the air mix damper 34 is supported by a support shaft extending horizontally above the partition wall 7 in the vehicle width direction. 4A is rotatably supported. The merging portion is divided into an opening 32 on the cold air passage 30 side and an opening 33 on the hot air passage 31 side by the support shaft support portion, and each of the openings 32 and 33 is divided by the air mix damper 34. Each vane is opened and closed.
[0021]
The upper portion of the air mix passage 35 branches into a rear passage having a vent outlet 36 and a front passage having a defrost outlet 37, and switching doors 39 and 40 are arranged in each passage so that the opening area of the passage can be adjusted. It is installed. A passage 38 that branches from the lower portion of the air mix passage 35 toward the rear of the vehicle body branches off. The vent outlet 36 is connected to the ventilator 62, the defrost outlet 37 is connected to the defroster duct 63, and the side opening 65 of the branch passage 38 is connected to the ventilator for the front seat occupant foot by a duct (not shown). Further, the front end opening 64 of the branch passage 38 is connected to the ventilator for the foot of the rear occupant by a vehicle air conditioning duct 80 shown in FIG.
[0022]
<Air flow in the air conditioning unit 2>
Therefore, in the passage configuration of the air conditioning unit 2, the air sent from the fan housing 22 to the air feed passage 21 by the blower fan 23 passes through the air filter 29 in a state where the air volume is adjusted by the air volume adjusting device 20. The dust is collected and further passes through the evaporator 5 to become cold air. This cold air branches into the cold air passage 30 side and the heater core 6 side (hot air passage 31 side) according to the distribution ratio of the air volume determined by the rotation position of the air mix damper 34, and the cold air toward the heater core 6 is the heater core. It passes through 6 and becomes warm air.
[0023]
Then, the cold air from the cold air passage 30 and the hot air from the hot air passage 31 are merged in the air mix passage 35 to become air-conditioning air of a required temperature, and according to the opening degree of each switching door 39, 40, 42 An amount of air-conditioned air is supplied from the vent outlet 36, the defrost outlet 37, or the openings 64 and 65 of the branch passage 38 to the vehicle compartment via a duct, a ventilator, and the like.
[0024]
<About the mounting structure of the air conditioning duct 80>
As shown in FIGS. 4A and 5, the vehicle air conditioning duct 80 includes a duct trunk 80 a having a connection portion 81 connected to the front end opening 64 (duct connection port) of the air conditioning unit 2 at the upstream end thereof. The two duct branch portions 80b and 80b branch left and right from the downstream end of the duct trunk portion 80a, and a connecting portion 80c that connects and reinforces the two duct branch portions 80b and 80b. As shown in FIG. 6, a stepped portion 82 having a substantially concave cross section is formed on the lower surface of the duct trunk 80a. The step 82 has a substantially concave cross section extending in a direction passing through the branch 80d where the left and right duct branches 80b and 80b are separated. In the center of the concave surface of the stepped portion 82, a guide groove 83 having a substantially triangular cross section is formed which extends in the same direction as the stepped portion 82 and whose opening gradually increases outward. Here, the guide groove 83 extends longer than a guide protrusion 72, which will be described later, and is slidably fitted to the guide protrusion 72 to connect the connection portion 81 of the air conditioning duct 80 to the air conditioning unit. 2 to the front end opening 64. The connecting portion 80c is provided with a viewing hole 84 in the vicinity of the branching portion 80d for visually recognizing a guide protrusion 72, which will be described later. The air conditioning duct 80 is located downstream of the viewing hole 84. Fastening holes 85 (fastening portions) are provided for fastening the air conditioning unit 2 and the air conditioning unit 2 to each other with fastening parts.
[0025]
The duct assembly case 4 </ b> C projects from the rear end of the duct assembly case 4 </ b> C and extends in the connecting direction of the air conditioning duct 80 to the front end opening 64 of the air conditioning unit 2. Corresponding to the fastening hole 85, a fixing hole 73 for fastening the air conditioning duct 80 to the air conditioning unit 2 is provided.
[0026]
Next, a procedure for connecting the vehicle air conditioning duct 80 to the air conditioning unit 2 will be described. First, the guide groove 83 provided in the air conditioning duct 80 is fitted into the guide protrusion 72 of the air conditioning unit 2, and the guide groove 83 and the guide protrusion 72 are in contact with each other. The air conditioning duct 80 is slid in the connecting direction of the air conditioning duct 80 with respect to the front end opening 64 of the air conditioning unit 2 while being visually recognized through the hole 84, and the connection portion 81 of the air conditioning duct 80 is moved to the front end opening 64 of the air conditioning unit 2. Connect to. And the hole position of the fastening hole 85 of this air conditioning duct 80 and the fixing hole 73 of this air conditioning unit 2 is match | combined, and this air conditioning duct 80 and this air conditioning unit 2 are fastened by fastening components. As described above, the air conditioning duct 80 can be attached to the air conditioning unit 2 as shown in FIG. 4B, and the variation between the relative positions of the air conditioning duct 80 and the air conditioning unit 2 can be suppressed. It is advantageous in securing the property.
[0027]
<Evaporator 5, heater core 6, air filter 29>
As shown in FIG. 2, the evaporator 5 is formed by laminating a plurality of tubes formed of thin metal plates such as aluminum so as to extend in the same direction and interposing corrugated fins between adjacent tubes. The inflow surface is formed in a rectangular shape. The evaporator 5 constitutes a refrigeration cycle together with a compressor, a condenser and the like disposed in the engine room of the automobile, and the refrigerant circulating through the refrigeration cycle flows through the tube of the evaporator 5 and passes through the evaporator 5. It is designed to cool the air.
[0028]
The heater core 6 is formed by laminating a large number of tubes made of a thin metal plate such as aluminum so as to extend in the same direction, interposing corrugated fins between adjacent tubes, and forming an air inflow surface in a rectangular shape. Has been. As shown in FIG. 3, the heater core 6 is connected to a water jacket of an automobile engine by two heater pipes 6a and 6b. The heater pipes 6a and 6b are disposed from the right side of the vehicle width of the heater core 6 and extend in front of the vehicle body substantially parallel to the heater core 6. The high-temperature cooling water circulating between the water jacket and the heater core 6 circulates in the tube of the heater core 6 and heat-exchanges with the air passing through the heater core 6 to heat the air. Yes. Further, the heater pipes 6a and 6b of the heater core 6 are covered with a heater cover 71 protruding downward from the lower right end of the duct assembly case portion 4C in the vehicle width direction.
[0029]
The air filter 29 is formed by an upper air filter 29a and a lower air filter 29b, and the upper air filter 29a has a greater ventilation resistance than the lower air filter 29b.
[0030]
<Drain receiving part 56>
The drain receiving portion 56 includes a first inclined portion 56a that inclines so as to gradually decrease from the front side of the vehicle body (right side in FIG. 2) toward the rear side of the vehicle body (left side in the drawing), and an end portion of the first inclined portion 56a. And a second inclined portion 56b that inclines so as to gradually increase toward the rear side of the vehicle body. The drain pipe 51 is connected to the lowest part of the boundary between the first inclined part 56a and the second inclined part 56b.
[0031]
The first inclined portion 56 a of the drain case portion 4 </ b> B includes a filter support portion 54 that supports the air filter 29 on the front side (rear side of the vehicle body) of the evaporator 5 and an evaporator support portion 55 that supports the lower end portion of the evaporator 5. Is formed.
[0032]
The filter support portion 54 has a substantially M-shaped cross section and extends the drain case portion 4B over the entire length in the vehicle width direction. The lower end of the air filter 29 is supported by a depressed portion in the center of the cross section of the support portion 54. The upper end of the air filter 29 is held by the main body case portion 4A.
[0033]
The evaporator support portion 55 includes a side surface of the filter support portion 54 on the rear side of the vehicle body, a ridge 55a extending in the vehicle width direction at a portion away from the filter support portion 54 in the vehicle width direction, and the filter support portion 54 and the ridge 55a. And a protrusion 55b extending in the vehicle width direction. That is, the lower end portion of the evaporator 5 is fitted into a recess formed by the filter support portion 54 and the protrusion 55a, and the lower surface is supported by the protrusion 55b. On the other hand, the upper end portion of the evaporator 5 is held in a concave portion that is formed in a portion between the air feed passage 21 and the cold air passage 30 in the main body case portion 4A and opens downward.
[0034]
The protrusions 55a and 55b are formed with notches at intervals in the vehicle width direction. Condensed water dripping from the evaporator 5 through the notches passes through the first inclined portion 56a toward the drain pipe 51. It comes to flow.
[0035]
As shown in FIGS. 7 and 8, the drain receiving portion 56 is inclined so as to be gradually lowered from the left side of the vehicle body toward the right side of the vehicle body. Connected from.
[0036]
Further, the evaporator 5 is connected to respective end portions of cooler pipes 5a and 5b extending forward of the vehicle body as shown in FIG. 9 in order to form the refrigeration cycle.
[0037]
<About the wind guide unit>
As shown in FIG. 7, the wind guide unit 3 includes a wind guide case 10 that engages two members (case members 10 a and 10 b) that are divided into left and right at a substantially central portion in the vehicle width direction. The inside / outside air switching damper 14 is provided.
[0038]
As shown in FIG. 7, the air guide case 10 is formed with a rectangular outside air intake 11 for taking in air outside the vehicle compartment via a vehicle-side cowl on the upper front portion of the case 10, as shown in FIG. A rectangular interior air inlet 12 for taking in air in the vehicle compartment is formed in the upper surface of the case 10. A grill 13 is integrally formed in the air guide case 10 at each of the intake ports 11 and 12.
[0039]
The inside / outside air switching damper 14 has a rectangular shape and is provided inside the air guide case 10, and one side thereof is rotated by an axis extending in the vehicle width direction between the intake ports 11 and 12 at the upper end of the air guide case 10. It is supported freely. Then, as shown in FIG. 9, the damper 14 is in a state in which one of the intake ports 11 and 12 is closed by the actuator 15 provided on the side surface of the air guide case 10 (the other is Driven). The actuator 15 is configured to operate in response to a signal from an air conditioning control unit (not shown) disposed in the instrument panel 60.
[0040]
The driving method of the damper 14 need not be limited to the actuator 15, and any driving method may be used.
[0041]
<About the blower fan 23>
As shown in FIG. 10, the blower fan 23 is a centrifugal multiblade fan, and is disposed in the fan housing 22 with its rotation shaft disposed in the vehicle width direction. Further, the fan drive motor 24 is connected to the blower fan 23. Are combined. The blower fan 23 and the drive motor 24 are inserted from the air guide case 10 attachment side of the fan housing 22, and the attachment ring 25 is engaged with the support portion of the drive motor 24 protruding to the opposite side of the fan housing 22. 22 is attached. After the blower fan 23 and the drive motor 24 are attached, the convex protrusion provided on the periphery of the fan insertion opening of the fan housing 22 is engaged with the concave groove provided on one side surface of the air packing 26, and the air packing 26, by engaging the convex protrusion provided on the other side surface of the H. 26 and the concave groove provided on the peripheral edge of the opening of the air guide case 10, while ensuring the airtightness of the air guide case 10 to the fan housing 22. Are connected.
[0042]
As shown in FIG. 11, one end of an air hose 27 for cooling the motor is connected to the drive motor 24. The other end of the air hose 27 is attached in communication with the fan housing 22 so that the air in the fan housing 22 can be taken in and sent to the drive motor 24. Further, in the middle of the air hose 27, a water intrusion prevention portion 27 a formed in an inverted U shape is provided so that water in the fan housing 22 does not enter the drive motor 24.
[0043]
<Others>
The air volume adjusting device 20 is coupled to a case lid 19 (shown in FIG. 9) that closes an insertion port for inserting the evaporator 5 and the air filter 29 into the drain case 75.
[0044]
The blowing direction switching doors 39, 40, 42 are operated by a link mechanism disposed on the side wall portion of the air conditioning case 4.
[0045]
【The invention's effect】
Therefore, according to the first aspect of the present invention, the guide protrusion is formed on one of the air conditioner and the air conditioning duct, and the other is slidably fitted on the guide protrusion and connected to the air conditioning duct. Since a guide groove is formed to guide the part to the duct connection port of the air conditioner, even if the duct connection port is not visible, the connection part of the air conditioning duct is guided to the duct connection port. It is possible to connect them, and it is advantageous for ensuring sealing performance by suppressing variations in relative positions, and it is possible to increase work efficiency.
[0046]
According to the invention which concerns on Claim 2, in the connection part of the said air-conditioning duct in Claim 1, the peephole for visually recognizing one of the said guide protrusion and the guide groove formed in the said air conditioner Therefore, one of the guide protrusion and the guide groove can be confirmed through the peep hole, and the guide protrusion can be securely fitted into the guide groove. it can.
[0047]
According to a third aspect of the present invention, in the first or second aspect, since the air conditioner and the air conditioning duct are connected to each other with the fastening parts, the variation in the relative position of each other can be suppressed. It is advantageous in securing the property.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an arrangement state of a vehicle air conditioner according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing an internal structure of an air conditioning unit according to an embodiment of the present invention.
FIG. 3 is an exploded perspective view showing the air conditioning unit with a part thereof omitted.
FIG. 4A is a perspective view showing a state before an air conditioning duct is attached to the air conditioning unit.
(B) The perspective view which shows the state after attaching the air-conditioning duct to the air-conditioning unit.
FIG. 5 is a perspective view of the air conditioning duct as viewed from below.
FIG. 6 is a longitudinal sectional view showing the vicinity of a guide groove of the air conditioning duct.
FIG. 7 is a front view of the air conditioner (viewed from the front of the vehicle body).
FIG. 8 is a rear view of the air conditioner.
FIG. 9 is a right side view of the air conditioner.
FIG. 10 is an exploded perspective view showing a blower fan portion of the air conditioning unit.
FIG. 11 is a left side view of the air conditioner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Air conditioning unit 4 Air conditioning case 4A Main body case part 4B Drain case part 4C Duct assembly case part 5 Evaporator (cooling heat exchanger)
6 Heater core (heat exchanger for heating)
8 Accommodating portion 64 Tip opening 72 Guide projection 73 Fixing hole 80 Vehicle air conditioning duct 80a Duct trunk portion 80b Duct branch portion 80c Connection portion 80d Branching portion 81 Connection portion 82 Step portion 83 Guide groove 84 Peeping hole 85 Fastening hole

Claims (3)

A vehicle air-conditioning duct mounting structure for attaching an air-conditioning duct for supplying air-conditioning air into the passenger compartment at a duct connection port of the vehicle air-conditioning apparatus,
The air conditioning duct has a duct trunk portion having a connection portion connected to the duct connection port at an upstream end thereof, and two duct branch portions branched to the left and right from the downstream end of the duct trunk portion,
The air conditioner has a facing surface facing the duct trunk of the air conditioning duct on the near side in the connection direction of the air conditioning duct to the duct connection port,
A guide protrusion is formed on one of the facing surface of the air conditioner and the duct trunk of the air conditioning duct , and the other is slidably fitted to the guide protrusion and the connection portion of the air conditioning duct is connected to the duct. A guide groove for guiding to the connection port is formed ,
One of the guide protrusion and the guide groove formed in the duct trunk of the air conditioning duct extends in a direction passing through a branched portion where the left and right duct branches are separated. Air conditioning duct mounting structure. The vehicle air conditioning duct mounting structure according to claim 1 ,
The above branching portion of the upper Symbol conditioning duct has a connecting portion for reinforcing by connecting ducts branches of the right and left, for viewing the other of the guide protrusions and guide grooves in the connecting portion A mounting structure for an air conditioning duct for a vehicle, wherein a peephole is formed. The vehicle air conditioning duct mounting structure according to claim 1 or 2,
The vehicle air-conditioning duct mounting structure, wherein the air-conditioning apparatus and the air-conditioning duct are provided with a fastening portion for fastening them with fastening parts while being connected to each other.

Images