JP2005178592A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle for keeping the performance of air conditioning while simplifying the manufacturing of a foot duct. <P>SOLUTION: The air conditioner comprises an air mix damper 10 for distributing air having passed through an evaporator 6 to a warm air passage 12 passing a heater core 8 and a cold air passage 14 bypassing the heater core, and the foot duct 30 of which upstream end is connected with the downstream end of a foot mode passage 20 disposed in the downstream of these passages 12 and 14 and which blows off air from a foot mode blow-off port of the downstream end thereof. The foot duct has integrally molded blow-off port 34 for the driver's seat, foot mode blow-off port 36 for the front passenger seat, and/or foot mode blow-off port 38 for the back seat, and a pressure loss adjusting section 40 for the back seat. The pressure loss adjusting section for the back seat is opened when the foot mode blow-off port for the back seat is closed, or is closed when the foot mode blow-off port for the back seat is opened. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner that maintains air conditioning performance while simplifying the manufacture of a foot duct.

Conventionally, an air conditioner for a vehicle has an evaporator disposed on the front side of the vehicle in the air conditioning unit case, a heater core disposed on the rear side thereof, and a foot for sending wind to the feet of the passenger on the rear side of the heater core. The thing where the duct is arrange | positioned is known (for example, refer patent document 1).
In addition, the conventional vehicle air conditioner is provided with an air introduction port for introducing air into the air conditioning unit case, an evaporator is disposed on the vehicle rear side of the air introduction port, and a heater core is disposed on the vehicle rear side of the evaporator. In some cases, the foot duct is arranged on the vehicle front side of the air conditioning unit case (see, for example, Patent Document 2).
The foot ducts in these conventional vehicle air conditioners described above are composed of a plurality of foot ducts for the driver's seat, front passenger seat, rear seat, etc., and the front and rear seat foot ducts are formed. There are things.
Of the above-mentioned foot ducts, for front seat and rear seat foot ducts, the mold is changed according to the necessity of the driver side, passenger side, and rear seat side outlets. And injection molding.

JP 08-156570 A JP 2002-301924 A

However, in the above-described conventional vehicle air conditioner, the cost is increased because the number of parts is increased by the number of parts including a plurality of foot ducts for driver seats, passenger seats, and rear seats. There is a problem.
In addition, in the conventional foot duct of a vehicle air conditioner, if the air outlets on the driver side, passenger side, and rear seat side are integrally formed by injection molding, depending on the necessity of each air outlet When the specifications of the duct change, the mold for injection molding must be changed each time, and there is a problem that the manufacturing cost increases.
Furthermore, in the foot duct of the conventional vehicle air conditioner, as described above, for the rear seat air outlet, the air outlet is changed in mold according to the use situation of the rear seat air outlet. However, the air pressure loss in the foot duct is different when the air outlet is open and closed, and the air temperature and air distribution characteristics in the duct change. There is a problem of end up.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and an object thereof is to provide a vehicle air conditioner that maintains air conditioning performance while simplifying the manufacture of a foot duct.

In order to achieve the above object, the present invention is a vehicle air conditioner that air-conditions a vehicle interior, and includes a casing, an evaporator that is provided in the casing and cools air introduced into the casing, A heater core that is provided downstream of the evaporator and that heats the air that has passed through the evaporator; a hot air passage that is provided between the evaporator and the heater core and that passes through the evaporator and that passes through the heater core; and the heater core An air mix damper that distributes to a cool air passage that bypasses the hot air passage, a face mode passage that is provided downstream of the hot air passage and the cold air passage, and blows out air from a face mode outlet at the downstream end thereof, and the hot air passage And a differential motor that is provided downstream of the cold air passage and blows out air from the differential mode outlet at the downstream end thereof. And a foot mode passage provided downstream of the hot air passage and the cold air passage, an upstream end of the foot mode passage is connected to a downstream end of the foot mode passage, and air is blown from a foot mode outlet at the downstream end. A foot mode outlet for a driver's seat and / or a foot mode outlet for a passenger seat, a foot mode outlet for a rear seat, and a rear seat. If the rear seat foot mode outlet is closed, the rear seat pressure loss adjustment portion is opened, and the rear seat foot mode outlet is opened. The loss adjusting unit is configured to be closed.
In the present invention configured as described above, for example, for a blow-molded foot duct, the foot mode outlet is selectively cut according to the specifications of the desired foot duct to form the outlet, and the pressure is changed accordingly. The loss adjusting part is selectively cut and opened. For this reason, a blower outlet can be formed easily and manufacturing cost can be suppressed even if specification differences, such as the number of blower outlets, arise. Moreover, in the air in a foot duct, the change of the pressure loss by the specification difference of the blower outlet of a foot duct can be suppressed, and air-conditioning performance can be maintained irrespective of the specification of a foot duct.

Further, in the present invention, the opening area of the rear seat pressure loss adjusting section in the foot duct is the same as when the rear seat foot mode outlet is closed and the rear seat pressure loss adjusting section is opened, and the rear seat foot mode outlet. The pressure loss in the foot duct when the rear seat pressure loss adjusting portion is closed is preferably substantially the same.
In this invention comprised in this way, the change of the pressure loss by the specification difference of the foot mode blowing part for backseats can be suppressed, and air-conditioning performance can be maintained irrespective of the specification of a foot duct.
Further, in the present invention, the foot duct has a driver's seat foot mode outlet, a passenger's foot mode outlet, a single rear seat foot mode outlet, and a rear seat pressure loss adjustment section. preferable.
In the present invention, the foot duct includes a foot mode outlet for a driver seat or a foot mode outlet for a passenger seat, a foot mode outlet for a driver rear seat or a foot mode outlet for a rear passenger seat, and a driver seat. Or you may have the pressure loss adjustment part for the rear seats for a passenger seat.
Further, in the present invention, the foot duct is preferably formed integrally by blow molding, and therefore can be easily cut after molding.

  According to the vehicle air conditioner of the present invention, the air conditioning performance can be maintained while simplifying the manufacture of the foot duct.

Hereinafter, an embodiment of a vehicle air conditioner of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a left side sectional view showing a vehicle air conditioner according to a first embodiment of the present invention. As shown in FIG. 1, the vehicle air conditioner 1 according to the present embodiment includes an air conditioning casing 2, and the air inlet 2 through which air taken from the front of the vehicle is introduced into the air conditioning casing 2. 4 is provided.
Further, an evaporator 6 is provided in the air conditioning casing 2, a heater core 8 is provided downstream of the evaporator 6, and an air mix is provided between the evaporator 6 and the heater core 8 in the air conditioning casing 2. A damper 10 is provided.
Air introduced from the air inlet 4 into the air conditioning casing 2 passes through the evaporator 6, the opening degree of the air mix damper 10 is adjusted, and the hot air passage 12 that passes through the heater core 8 and the cold air passage that does not pass through the heater core 8. 14 is allocated.
The air that has passed through the passages 12 and 14 is mixed in the air mix region 16 where the passages 12 and 14 meet.

On the downstream side of the air mix region 16, a foot mode passage 18 is formed toward the rearmost portion (vehicle compartment side) of the air conditioning casing 2, and the face mode passage 20 and this face are directed toward the upper portion of the air conditioning casing 2. A differential mode passage 22 located in front of the mode passage 20 is formed.
Further, the foot mode passage 18 is provided with a foot mode switching damper 24. The foot mode switching damper 24 opens the foot mode passage 18 when the foot mode is selected as the air conditioning mode of the vehicle air conditioner 1. When the air mixed region 16 is switched to flow to the foot mode passage 18 or when a mode other than the foot mode is selected as the air conditioning mode, the foot mode passage 18 is closed and the air mix region 16 is closed. The mixed air is switched so as to flow to the face mode passage 20 or the differential mode passage 22.
Further, a face mode switching damper 26 is provided in the face mode passage 20, and a differential mode switching damper 28 is provided in the differential mode passage 22, and the face passes through the air mix region 16 by opening / closing of these dampers 26, 28. The amount of air blown out from the mode air outlet 20a and the differential mode air outlet 22b is adjusted.
Further, a foot duct 30 which is a blow molded product such as polypropylene is connected to the outlet portion 18a of the foot mode passage 18, and the air passing through the foot duct 30 is on the driver seat side in the vehicle interior. And depending on the specifications of the foot duct, it is sent to the foot of the passenger seat side or the foot of the rear seat in the vehicle interior.

FIG. 2A is a schematic front view of the foot duct 30 of the vehicle air conditioner 1 according to the first embodiment of the present invention shown in FIG. 1 as viewed from the right, and FIG. It is a schematic right view of the foot duct 30 shown to (A) of FIG.
As shown in FIGS. 2A and 2B, the foot duct 30 of the vehicle air conditioner 1 according to the present embodiment includes a connection port 32 connected to the outlet 18 a of the foot mode passage 18, A foot mode air outlet 34 for the driver's seat that blows air toward the feet of the driver's seat, a foot mode air outlet 36 for the passenger's seat that blows air toward the feet of the passenger seat in the passenger compartment, and the feet of the rear seat in the passenger compartment And a rear-seat foot mode outlet 38 for blowing air toward the rear.
A rear seat pressure loss adjusting section 40 is provided on the wall surface forming the rear seat foot mode outlet 38. The rear seat pressure loss adjusting section 40 is opened when the rear seat foot mode air outlet 38 is closed, and is closed when the rear seat foot mode air outlet 38 is opened. Can be cut after blow molding (details will be described later).
Furthermore, the opening area of the rear seat pressure loss adjustment section 40 of the foot duct 30 is the same as that when the rear seat foot mode outlet 38 is closed and the rear seat pressure loss adjustment section 40 is opened. When the outlet 38 is opened and the rear seat pressure loss adjusting portion 40 is closed, the pressure loss in the foot duct 30 is substantially the same. For this reason, it is adjusted so that the pressure loss in the foot duct 30 does not change due to the difference in specifications of the presence or absence of the foot mode outlet 38 for the rear seat.

FIG. 3 is a schematic view similar to FIG. 2 showing the foot duct immediately after blow molding in the foot duct of the vehicle air conditioner according to the first embodiment of the present invention. Here, in FIG. 3, the same parts as those shown in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. Moreover, the dashed-dotted line 32a, 34a, 36a, 38a, 40a shown in FIG. 3 has shown the cutting line at the time of cut | disconnecting the foot duct 30 immediately after blow molding.
As shown in FIG. 3, in the foot duct 30 immediately after being blow-molded, a connection port 32 is formed when cut along the alternate long and short dash line 32a, and a foot mode outlet 34 for the driver's seat is formed when cut along the alternate long and short dash line 34a. When formed along the alternate long and short dash line 36a, the passenger seat foot mode air outlet 36 is formed. When cut along the alternate long and short dash line 38a, the rear seat foot mode air outlet 38 is formed and cut along the alternate long and short dash line 40a. Then, the rear seat pressure loss adjusting section 40 is opened.

In addition, in the foot duct 30 of the vehicle air conditioner 1 according to the present embodiment, the foot duct 30 immediately after being blow-molded is cut along the alternate long and short dash line 38a so that the rear seat foot mode air outlet 38 is provided. In this case (see FIG. 2), the one-dot chain line 40a of the rear seat pressure loss adjusting unit 40 is not cut, and a protrusion is formed in a blow-molded state.
On the other hand, in the foot duct 30 of the vehicle air conditioner 1 according to the present embodiment, the foot duct 30 immediately after being blow-molded is not cut along the alternate long and short dash line 38a, and the rear seat foot mode air outlet 38 is not provided. In this case, the rear seat pressure loss adjusting section 40 is cut along the one-dot chain line 40a to open.
As described above, in the foot duct 30 of the vehicle air conditioner 1 according to the present embodiment, the rear seat pressure loss adjusting unit 40 is appropriately cut and opened in accordance with the presence or absence of the rear seat foot mode air outlet 38. The pressure loss in the duct 30 does not change due to the difference in specifications with or without the rear seat foot mode air outlet 38.
Furthermore, the opening area when the rear seat pressure loss adjusting unit 40 is opened is smaller than the opening area of the rear seat foot mode air outlet 38. As described above, this is the case when the rear seat foot mode air outlet 38 is opened so that the pressure loss in the foot duct 30 does not change due to the difference in specifications of the presence or absence of the rear seat foot mode air outlet 38. This is because the pressure loss in the extension duct (not shown) for the rear seat connected to the downstream side of the outlet 38 is taken into consideration.

Next, the operation of the vehicle air conditioner 1 according to the first embodiment of the present invention will be described.
The air introduced into the air conditioning casing 2 from the air inlet 4 of the vehicle air conditioner 1 of the present embodiment passes through the evaporator 6 and warm air that passes through the heater core 8 according to the open / close state of the air mix damper 10. It is distributed to the cool air passage 14 that does not pass through the passage 12 and the heater core 8. The air that has passed through the passages 12 and 14 is mixed in the air mix region 16 where the passages 12 and 14 meet.
When the foot mode is selected as the air conditioning mode of the vehicle air conditioner 1, the foot mode switching damper 24 opens the foot mode passage 18, and the air mixed in the air mix region 16 passes through the foot mode passage 18. pass. The air that has passed through the foot mode passage 18 flows through the foot duct 30 from the connection port 32 of the foot duct 30.

Here, in the above-described foot duct 30, when the rear seat foot mode air outlet 38 is provided (see FIG. 2), the foot duct 30 immediately after blow molding is cut along the alternate long and short dash line 38a. Thus, the rear seat foot mode air outlet 38 is formed. Moreover, the dashed-dotted line 40a of the rear seat pressure loss adjustment part 40 is not cut | disconnected, but the rear seat pressure loss adjustment part 40 becomes a form which is not opened as it is immediately after blow molding. As a result, the air in the foot duct 30 is blown out from the driver's seat foot mode air outlet 34, the passenger seat foot mode air outlet 36, and the rear seat foot mode air outlet 38 into the vehicle interior.
On the other hand, when the foot duct 30 has a specification in which the rear seat foot mode outlet 38 is not provided, the foot duct 30 immediately after the blow molding is not cut along the alternate long and short dash line 38a, and the pressure loss for the rear seat The adjustment unit 40 is cut along the alternate long and short dash line 40a and opened. As a result, the air in the foot duct 30 is blown out from the driver seat foot mode air outlet 34 and the passenger seat foot mode air outlet 36 into the passenger compartment. In addition, since the rear seat pressure loss adjusting unit 40 is opened, an increase in air pressure loss in the foot duct 30 due to the absence of the rear seat foot mode outlet 38 is suppressed.

According to the vehicle air conditioner 1 according to the first embodiment of the present invention described above, a blowout opening into the vehicle compartment is simply formed by selectively cutting a predetermined position of the foot duct integrally formed by blow molding. Even if there is a difference in specifications such as the number of outlets, the manufacturing cost can be reduced.
Moreover, according to the vehicle air conditioner 1 according to the present embodiment, when the specification of the foot duct without the rear seat foot mode air outlet 38 is adopted, the rear seat pressure loss adjustment unit 40 follows the one-dot chain line 40a. It is cut and opened. For this reason, it is possible to suppress an increase in air pressure loss in the foot duct 30 due to the absence of the rear seat foot mode air outlet 38, and the foot regardless of the difference in specifications of the presence or absence of the rear seat foot mode air outlet 38. The air conditioning performance including the characteristics of the temperature of the air in the duct 30 and the air distribution can be maintained.

Next, a vehicle air conditioner according to a second embodiment of the present invention will be described with reference to FIG.
FIG. 4 is a schematic view similar to FIG. 2 showing a foot duct of a vehicle air conditioner according to a second embodiment of the present invention. Here, in FIG. 4, the same parts as those in FIGS. 2 and 3 are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIG. 4, the foot duct 50 of the vehicle air conditioner according to the second embodiment of the present invention is composed of two separate blow-molded products, ie, a driver seat side foot duct 50a and a passenger seat side foot duct 50b. The air that has passed through the foot mode passage 18 (see FIG. 1) passes through the driver seat foot mode outlet 34a and the driver seat rear seat foot mode outlet 38a of the driver seat side foot duct 50a, respectively. It is blown out toward the foot of the rear seat, and the passenger seat and rear passenger side foot mode outlet 36 and the passenger seat side rear seat foot mode outlet 38b are provided behind the passenger seat and the passenger seat, respectively. It is blown out toward the feet of the seat.
Here, in this embodiment shown in FIG. 4, a portion corresponding to the rear seat outlet is cut off from each of the blow-molded foot ducts 50 a and 50 b, and the driver seat side rear seat foot mode outlet 38 a. The passenger seat side rear seat foot mode air outlet 38b is formed, and the rear seat pressure loss adjusting portion 40 is described as an example in which the protrusions are formed in a blow-molded state. Without being limited to these forms, for each of the foot ducts 50a, 50b immediately after blow molding, the rear seat pressure loss adjustment section 40 is cut without cutting the portion corresponding to the rear seat outlet. You may make it the form opened.

  According to the vehicle air conditioner according to the second embodiment of the present invention configured as described above, in addition to the effects of the vehicle air conditioner according to the first embodiment described above, the foot duct 50a on the driver's seat side and the passenger seat By separating the side foot duct 50b, when performing duct maintenance, etc., or when changing the design of the foot duct, remove and replace only the target duct Work load can be reduced.

  In addition, about the vehicle air conditioner by 1st and 2nd embodiment of this invention mentioned above, although the form with which the foot duct was provided in the vehicle rear side of the air conditioning casing is demonstrated, it is not limited to these forms For example, the present invention is sufficiently applicable to a foot duct of a vehicle air conditioner in which a foot mode passage is formed on the vehicle front side of the air conditioning casing.

1 is a left side sectional view showing a vehicle air conditioner according to an embodiment of the present invention. It is the schematic which shows the foot duct of the vehicle air conditioner by 1st Embodiment of this invention. It is the schematic which shows the foot duct immediately after blow molding in the foot duct of the vehicle air conditioner by 1st Embodiment of this invention shown in FIG. It is the schematic which shows the foot duct of the vehicle air conditioner by 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Air conditioning casing 4 Air inlet 6 Evaporator 8 Heater core 10 Air mix damper 12 Hot air passage 14 Cold air passage 16 Air mix area 18 Foot mode passage 20 Face mode passage 22 Differential mode passage 24 Foot mode switching damper 26 Face mode Switching damper 28 Differential mode switching damper 30, 50 Foot duct 32 Foot duct connection port 34 Driver's seat outlet 36 Passenger seat outlet 38 Rear seat outlet 40 Pressure loss adjustment section

Claims (5)

A vehicle air conditioner for air-conditioning a vehicle interior,
A casing,
An evaporator provided in the casing and for cooling the air introduced into the casing;
A heater core that is provided downstream of the evaporator and heats the air that has passed through the evaporator;
An air mix damper that is provided between the evaporator and the heater core and distributes the air that has passed through the evaporator to a hot air passage that passes through the heater core and a cold air passage that bypasses the heater core;
A face mode passage that is provided downstream of the hot air passage and the cold air passage, and blows out air from a face mode outlet at the downstream end thereof;
A differential mode passage that is provided downstream of the hot air passage and the cold air passage, and blows out air from a differential mode outlet at the downstream end thereof;
A foot mode passage provided downstream of the hot air passage and the cold air passage;
A foot duct having an upstream end connected to the downstream end of the foot mode passage and blowing air from a foot mode outlet at the downstream end;
Have
The foot duct has an integrally formed driver's foot mode air outlet and / or a passenger foot mode air outlet, a rear seat foot mode air outlet, and a rear seat pressure loss adjustment section, When closing the rear-seat foot mode outlet, the rear-seat pressure loss adjustment unit is opened. When opening the rear-seat foot mode outlet, the rear-seat pressure loss adjustment unit is closed. An air conditioner for a vehicle characterized by the above.   The opening area of the pressure loss adjustment part for the rear seat of the foot duct is the same as when the foot mode outlet for the rear seat is closed and the pressure loss adjustment part for the rear seat is opened, and the foot mode outlet for the rear seat is opened. The vehicle air conditioner according to claim 1, wherein the pressure loss in the foot duct when the pressure loss adjusting unit for the vehicle is closed is substantially the same.   3. The foot duct has a driver foot mode air outlet, a passenger foot mode air outlet, a single rear seat foot mode air outlet, and a rear seat pressure loss adjustment unit. Vehicle air conditioner.   The foot duct is for a driver mode foot mode outlet or passenger seat foot mode outlet, a driver rear seat foot mode outlet or a passenger rear seat foot mode outlet, and a driver seat or passenger seat The vehicle air conditioner according to claim 1, further comprising a rear seat pressure loss adjustment unit.   The vehicular air conditioner according to any one of claims 1 to 4, wherein the foot duct is integrally formed by blow molding.

Images