JP2000219024A - Auxiliary air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary air conditioner requiring a less number of parts and low in cost and having a compact figure and small ventilation resistance and noises. SOLUTION: A hot air blow opening 13 is arranged at one end of a unit case 3 and a cold air blow opening 12 is arranged at the other end of the unit case 3. A directional control door 8 is provided right downstream of an air guide port 9 so that air can be fed to either the hot air blow opening 13 or the cold air blow opening 12 by directional control of the directional control door 8 to provide a change between a cooling mode and a heating mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary air conditioner for an automobile mounted mainly on the rear seat side of a so-called minivan type vehicle.

[0002]

2. Description of the Related Art As a conventional air conditioning system for a vehicle, there is an air conditioning system in which a main air conditioner and an auxiliary air conditioner are combined. In this air conditioning system, for example, when the air conditioning capacity of the main air conditioner runs short in summer or winter, the shortage is supplemented by the auxiliary air conditioner.

Such an air conditioning system is used for a so-called minivan type vehicle in which a large number of seats are arranged in a large cabin, so that a temperature difference between a front seat and a rear seat tends to increase.

[0004] As a conventional auxiliary air conditioner, there is a conventional auxiliary air conditioner in which an independent cooling device and a heating device are mounted on a rear seat side, and one of them is operated as required (prior art 1).

In this auxiliary air conditioner, the cooling device has an evaporator, a blower, and a blower driving motor, and the heating device has a heater core, a blower, and a blower driving motor.

On the other hand, an evaporator, a heater core,
There is an auxiliary air conditioner in which a blower, a blower driving motor, an air mixing door, and a mode switching door are housed in the same unit case (prior art 2).

In this auxiliary air conditioner, the mixing ratio of warm air and cool air is adjusted by an air mix door, and mode switching between cold air blowing (cooling mode) and hot air blowing (heating mode) is performed by a mode switching door.

[0008] The cool air is blown out from the cool air blowing opening,
Hot air is blown out from the hot air blowing opening. Both the hot air blowing opening and the cold air blowing opening are formed at one end of the unit case. The mode switching door is also arranged at one end of the unit case. The blower is arranged on the other end side of the unit case.

[0009]

However, the prior art 1
In the case of the auxiliary air conditioner, since the cooling device and the heating device are independent units as described above, each device includes a blower and a drive motor. Therefore, the auxiliary air conditioner has a large number of components, increases the cost, and is inefficient in mounting space.

On the other hand, the auxiliary air conditioner of the prior art 2 has the air mix door and the mode switching door, so that the unit case becomes large and the space efficiency is poor.

A cool air duct is connected to the cool air outlet, and a hot air duct is connected to the warm air outlet. The cool air duct is routed so that cool air is blown down from the roof, and the hot air duct is routed so that warm air is blown to the feet of the rear occupant. When placed at the foot of the vehicle, the cool air duct must be folded from one end of the case to the other end (from the front to the rear of the vehicle), which not only requires a large space but also increases the length of the duct passage. Therefore, the ventilation resistance increases, the air volume decreases, and the noise also increases.

The present invention has been made in view of such circumstances, and an object thereof is to provide an auxiliary air-conditioning apparatus for a vehicle which has a small number of parts, is low-cost and compact, and has low ventilation resistance and low noise. It is.

[0013]

According to a first aspect of the present invention, there is provided an automotive auxiliary air conditioner which is located substantially in the middle of a unit case and the unit case, and which supplies air from a blower to the unit case. An air introduction port to be introduced into the unit case, a hot air blowing opening arranged at one end of the unit case, a cold air blowing opening arranged at the other end of the unit case, A switching member that is provided downstream and selects one of the hot air blowing opening and the cold air blowing opening as a supply destination of the air introduced into the unit case, and upstream of the hot air blowing opening. A heating heat exchanger for heating the air introduced from the air inlet, and a heat exchanger provided upstream of the cold air outlet for cooling the air introduced from the air inlet. Characterized in that it includes a cooling heat exchanger.

By switching the switching member, air can be supplied to only one of the hot air blowing opening and the cold air blowing opening. Only one blower and one drive motor are required, eliminating the need for an air mix door.

Further, since the opening for blowing hot air is arranged at one end of the unit case and the opening for blowing cold air is arranged at the other end of the unit case, even if the opening for blowing hot air is arranged on the front side of the vehicle. In addition, it is not necessary to turn the roof duct connected to the cool air blowing opening from one end of the unit case to the other end (from the front side to the rear side of the vehicle), and the length of the passage of the roof duct is reduced.

Further, since the air inlet is disposed substantially at the center of the unit case, the blower can be disposed substantially at the center of the unit case, and a large suction space can be secured in front of the suction port of the blower. The suction resistance becomes smaller.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing an auxiliary air conditioner for a vehicle according to an embodiment of the present invention. FIG. 1 (a) shows a heating mode state, and FIG. 1 (b) shows a cooling mode state. FIG. 2A is a view of the auxiliary air-conditioning system for a vehicle shown in FIG. 1 as viewed from the blower side, and FIG.
It is an arrow view.

The automotive auxiliary air conditioner 1 includes a unit case 3, a blower 4, an electric motor 5, an evaporator (cooling heat exchanger) 6, a heater core (heating heat exchanger) 7, a switching door (switching member) 8, and the like. It is composed of

The unit case 3 has an air inlet 9, an opening 13 for blowing out warm air, and an opening 12 for blowing out cool air. The air inlet 9 is located substantially in the middle of the unit case 3, the opening 13 for blowing warm air is located at one end of the unit case 3, and the opening 12 for blowing cool air is located at the other end of the unit case 3. The hot air blowing opening 13 and the cold air blowing opening 12 face each other in the longitudinal direction of the unit case 3.

A hot air passage 11 is formed between the hot air outlet 13 and the air inlet 9, and a cool air passage 10 is formed between the cool air outlet 12 and the air inlet 9. .

The blower 4 is mounted on the side of the unit case 3 where the air inlet 9 is formed, and is driven to rotate by the electric motor 5. Since the air inlet 9 was formed almost in the middle of the unit case 3, the blower 4 could be mounted almost in the middle of the unit case 3. Air is sucked from the suction port 4 a of the blower 4 as shown by an arrow 14 in FIG. 2 (b), and is introduced into the unit case 3 through the air introduction port 9.

The evaporator 6 is provided in the middle of the cool air passage 190. The heater core 7 is provided in the middle of the hot air passage 11.

The switching door 8 is provided immediately downstream of the air inlet. The switching door 8 is in the heating mode position (FIG. 1A)
1) and a cooling mode position (a position shown in FIG. 1 (b)), and a destination of the air introduced into the unit case 3 by the switching operation (the hot air blowing opening 13 or the cold air). The blowing opening 12) is selected. When the switching door 8 is at the heating mode position, the switching door 8 shuts off the cold air passage 10 and opens the hot air passage 11. When the switching door 8 is in the cooling mode position, the switching door 8 shuts off the hot air passage 11 and opens the cold air passage 10.

FIG. 3 is a perspective view showing an automotive auxiliary air conditioner mounted on a vehicle, and FIG. 4 is a view for explaining the relationship between a rear occupant and the automotive auxiliary air conditioner.

As shown in FIGS. 3 and 4, the vehicle auxiliary air conditioner 1 is installed on the floor on the right rear window 16 side.
The opening 13 for blowing warm air was directed toward the front of the vehicle, and the opening 12 for blowing cool air was directed toward the rear of the vehicle. The rear window 16 is provided between the C pillar 17 and the D pillar 18.

A foot duct 19 is provided in the hot air blowing opening 13.
Is connected. The foot duct 19 is bent in the vehicle width direction at the position of the rear wheel house 20, and extends along the floor surface as it is. A plurality of outlets 23 are provided in the foot duct 19 along the vehicle width direction.

A roof duct 2 is provided in the cold air blowing opening 12.
4 are connected. The roof duct 24 is the rear wall 2 of the cabin.
5, rises along the roof, bends in the vehicle width direction on the roof, and extends along the roof surface as it is. The roof duct 24 is provided with a plurality of outlets 27 along the vehicle width direction.

When the switching door 8 is moved to the heating mode position shown in FIG. 1 (a), the switching door 8 shuts off the cold air passage 10 and opens the hot air passage 11. The air introduced into the unit case 3 from the air inlet 9 by the blower 4 passes through the heater core 7 through the hot air passage 11 and is blown out from the hot air blowing opening 13.

Since the air is heated when passing through the heater core 7, hot air is blown out from the hot air blowing opening 13. The warm air travels in the foot duct 19 and the outlet 23
From the vehicle. As a result, the rear passengers 28
Warm air is blown to the feet of the vehicle 2 to supplement the heating capacity of the main vehicle air conditioner (not shown) mounted on the vehicle 2.

On the other hand, when the switching door 8 moves to the cooling mode position shown in FIG. 1B, the switching door 8 shuts off the hot air passage 11 and opens the cold air passage 10. The air introduced into the unit case 3 from the air inlet 9 passes through the evaporator 6 through the cool air passage 10 and is blown out from the cool air blowing opening 12.

Since the air is cooled when passing through the evaporator 6, cold air is blown out from the cool air blowing opening 12. The cool air travels in the roof duct 24 and is blown out of the outlet 27 into the vehicle interior. As a result, it is blown down above the occupant 28 in the rear seat, and the cooling capacity of the main air conditioner for the vehicle is supplemented.

The switching operation of the switching door 8 is performed by a command from a control device (not shown). Signals from various sensors are input to the control device, and it is determined whether the air conditioning capacity of the main air conditioner for the vehicle with respect to the set conditions is sufficient or not based on the temperature and humidity of the vehicle compartment, and the switching door 8 is driven.

According to this embodiment, since only one blower 4 and one driving motor 5 are required, the number of parts can be reduced, the cost can be reduced, and the space can be saved. Further, since one switching door 8 is sufficient and the air mixing door is not required, the unit case 3 can be downsized. Further, since the opening 13 for warm air blowing is arranged on one end side of the unit case 3 and the opening 12 for cooling air blowing is arranged on the other end side of the unit case 3, even if the opening 13 for warm air blowing is arranged on the front side of the vehicle. , Roof duct 2
There is no need to turn the unit case 3 from one end of the unit case 3 to the other end, and the length of the passage of the roof duct 24 is reduced.
As a result, the ventilation resistance is reduced, and a decrease in air volume can be suppressed, and noise is also reduced.

Further, since the air inlet 9 is formed almost at the center of the unit case 3 as described above, the blower 4 can be mounted almost at the center of the unit case 3, and the air inlet 9 is provided in front of the inlet 4a of the blower 4. A large suction space 29 can be ensured, the air suction resistance is reduced, the air flow is increased, the air flow velocity is reduced, and noise is reduced.

Since it is not necessary to increase the size of the blower 4 and the electric motor 5 to compensate for the decrease in air volume, it is possible to avoid the accompanying increase in size of the apparatus, reduction in space efficiency, consumption of the battery, and increase in noise. .

[0037]

As described above, according to the vehicle auxiliary air conditioner of the first aspect of the present invention, since only one blower and one drive motor are required, the number of parts is reduced and the cost is reduced. In addition, space can be saved. Further, since the air mix door is not required, the unit case can be reduced in size. Also, when the hot air blowing opening is arranged on the front side of the vehicle, the cold air blowing opening is arranged on the front and rear side of the vehicle, so the roof duct connected to the hot air blowing opening is connected to one end of the unit case. It is not necessary to fold from the other end side, the passage length of the roof duct is reduced, as a result, the ventilation resistance is reduced, and a decrease in air volume can be suppressed,
Noise is also reduced.

Further, a blower can be mounted almost at the center of the unit case, and a large suction space can be secured in front of the suction port of the blower. Therefore, the suction resistance is reduced and the air volume is increased. The flow velocity is reduced and noise is reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an automotive auxiliary air conditioner according to an embodiment of the present invention, wherein FIG. 1 (a) shows a heating mode state, and FIG. 1 (b) shows a cooling mode state. FIG.

2 (a) is a view of the automotive auxiliary air conditioner of FIG. 1 as viewed from the blower side, and FIG. 2 (b) is a view taken in the direction of arrow A in FIG. 2 (a).

FIG. 3 is a perspective view showing an auxiliary air conditioner for a vehicle mounted on a vehicle.

FIG. 4 is a diagram for explaining a relationship between a passenger in a rear seat and an auxiliary air conditioning system for a vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Auxiliary air conditioner for vehicles 3 Unit case 4 Blower 5 Electric motor 6 Evaporator 7 Heater core 8 Switching door 9 Air introduction port 10 Cold air passage 11 Hot air passage 12 Opening for cold air blowing 13 Opening for hot air blowing

Claims (1)

[Claims] 1. A unit case, an air inlet which is located substantially in the middle of the unit case and introduces air from a blower into the unit case, and a hot air blowout arranged at one end of the unit case. An opening, an opening for blowing cold air arranged on the other end side of the unit case, and an opening for hot air blowing provided as a supply destination of air introduced into the unit case, provided downstream of the air inlet. A switching member for selecting one of the cold air blowing openings; a heating heat exchanger provided upstream of the hot air blowing opening to heat air introduced from the air inlet; and the cold air blowing. And a cooling heat exchanger that is provided upstream of the air opening and cools the air introduced from the air inlet.