JPH10109523A - Air conditioner for vehicle backseat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pass a hot air heated by a heater core through a position separated from an external plate of a vehicle, prevent it from being affected by the outside air temperature, and reduce the loss of heat by arranging the heater core and an air mix door in the outside and the inside of the car compartment respectively in a unit case. SOLUTION: A blower fan 1 is arranged in a blower case 9 and a heater case 15 is connected to the lower stream side of a cooler case 14 in a backseat air conditioner for a one-box car, and in this case, a heater core 4 and an air mix door 3 are arranged in the inside and the outside of a car compartment respectively in the heater case 15. When the blower fan 1 is rotated, a sucked air passes through an evaporator 2 and, when the air mix door 3 is set to a heating mode, the air is heated by passing through the heater core 4 and guided to an air mix chamber 11 as the hot air. Then, the heater core 4 is installed inside the compartment so that the heat loss of the hot air heated by the heater core 4 can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle rear seat air conditioner which independently performs air conditioning on the rear seat side of a large vehicle such as a one-box vehicle.

[0002]

2. Description of the Related Art For example, in a vehicle having a large rear space such as a one-box vehicle, the rear seat is independently air-conditioned to improve the comfort of rear passengers. A rear air conditioner may be installed. Therefore, a conventional rear seat air conditioner described in, for example, Japanese Utility Model Laid-Open No. 4-7910 will be described with reference to FIG. As shown in FIG. 5, the rear-seat air conditioning unit is installed on the side wall of the rear seat of the vehicle, and includes a blower fan, a heater core, an evaporator, a door for changing the blowing mode, and an air mix damper.

The rear seat air-conditioning unit is connected to a suction port 51, a roof port 52, and a foot port 53 disposed in the passenger compartment via a duct, and a roof port 52 disposed near the ceiling. In addition, the conditioned air is blown out from the foot outlet 53 arranged near the rear floor surface.

[0004]

However, as shown in FIG. 6, in a conventional air conditioner for a rear seat of a vehicle, a heater core 56 is disposed outside a vehicle compartment and an air mix door 57 is disposed inside a vehicle compartment in a unit case. ing. Space 60 sandwiched between body outer plate 59 and unit case
The air staying in the space 60 is easily affected by the temperature of the air outside the vehicle compartment, and when the outside air temperature in winter is low, the temperature of the air staying in the space 60 becomes extremely low. Therefore, if the heater core 56 is installed outside the vehicle cabin, the air heated by the heater core 56 is affected by the cool air in the space 60, resulting in a large heat loss. In addition, as shown in FIG. 6, the air duct generally going to the roof outlet 52 is installed outside the cabin, and the air conditioning duct going to the foot outlet 53 is installed inside the cabin. When the air is introduced into the roof outlet, the resistance of the cool air passage also increases, which causes a problem that the air volume decreases.

[0005] In view of the above problems, the present invention guides the hot air heated by the heater core to the foot outlet smoothly without being affected by the outside air temperature, and quickly cools the cold air bypassing the heater core. It is an object of the present invention to provide an air conditioner for a rear seat of a vehicle which can be guided to a roof outlet.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a heater core is disposed outside a vehicle compartment and an air mix door is disposed inside a vehicle compartment in a unit case. Is adopted. By adopting this configuration, the warm air heated by the heater core passes through a position distant from the outer panel (outer panel) of the vehicle, so that the outside air temperature is extremely low without being affected by the outside air temperature. However, heat loss due to this is not received.

According to the second aspect of the present invention, the air conditioning duct leading to the roof outlet is installed outside the vehicle compartment, and the air conditioning duct leading to the foot outlet is installed inside the vehicle interior. The warm air heated by the heater core quickly goes to the foot outlet, and the cool air that has bypassed the heater core is quickly introduced to the roof outlet without receiving air resistance.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner for a rear seat of a vehicle according to the present invention will be described with reference to the drawings. FIG. 1 is a system diagram showing the configuration of a rear-seat air conditioner installed in the rear seat of a one-box vehicle. 1 is a blower fan, 2 is an evaporator, 3 is an air mix door, 4 is a heater core, 5 is a mode door, and 6 is a mode door. Denotes a roof outlet, 7 denotes a foot outlet, and 8 denotes a suction port.

The blower fan 1 is disposed in a scroll-shaped blower case 9, rotates by receiving a rotational power from a blower motor 10 that rotates and receives driving power from a vehicle-mounted battery, and sucks air in a vehicle compartment. , And is pressure-fed toward the evaporator 2 arranged in the cooler case 14 on the downstream side. The evaporator 2 is arranged in a cooler case 14 connected to the air downstream of the blower case 9, and exchanges heat between the refrigerant passing through the inside and the air pumped by the blower fan 1 to exchange the air. Cooling. A heater case 15 is connected downstream of the cooler case 14 in the air. In the heater case 15, the heater core 4 is disposed on the vehicle interior side, and the air mix door 3 is disposed on the vehicle exterior side. The heater core 4 exchanges heat between the engine cooling water and the cool air that has passed through the evaporator 4, and heats the cool air. The air mix door 3 is located at a position (M
AX HOT) can be set to an arbitrary position (air mix mode) between positions (MAX COOL) for guiding the total amount of air to the bypass flow path. And heater core 4
The position where the hot air and the cold air that have passed through the bypass flow path joins is the air mix chamber 11, where the cool air and the hot air are mixed. Further, on the downstream side of the air mix chamber 11, the conditioned air mixed in the air mix chamber 11 is guided to a roof side outlet located near the ceiling and a roof side outlet located near the rear floor. There is a foot outlet 7 that leads to the exit,
A mode door 5 is installed at this junction. The mode door 5 has a roof blowing mode for guiding the total amount of air to the roof outlet 6, a foot blowing mode for guiding the total amount of air to the foot outlet 7, and a total air amount at an arbitrary position between these two modes. It can be selected and set from three blow-off modes, namely, a bi-level mode in which a desired ratio is divided. The blower unit 9, the cooler case 14, and the heater case 15 are provided between the side trim 12 and the outer panel 13 forming the outer wall of the body. In particular, the duct from the rear floor to the roof outlet that rises to the ceiling has a side window. Avoid the pillar part.

Next, the operation of the air conditioner for a rear seat having the above structure will be described. When the occupant turns on the switch of the air conditioner for the rear seat, the blower motor 10 receiving the power supply from the onboard battery rotates and the blower fan 1 rotates. Here, the blower fan 1 is a double-suction type fan.
The air inside the vehicle cabin is sucked through the suction port 8 formed in a part of the second case 2, and the air convection between the side trim 12 and each unit case is also sucked. On the other hand, from the outside of the cabin of the blower fan 1, air convection between each unit case and the outer panel 13 forming the body outer wall is sucked. The total amount of air sucked by the rotation of the blower fan 1 in this manner is determined by the evaporator 2.
Pass through. Therefore, the operation of the evaporator 2 cools and dehumidifies the entire amount of air. When the air mix door 3 is set to the cooling mode, the entire amount of the cooled and dehumidified air passes through the bypass passage and is guided to the roof outlet duct. At this time, the mode door 5 is generally set to the roof blowout mode, and the cool air that has passed through the bypass flow passage is guided to the roof blowout opening 6 with little resistance and blows out into the vehicle interior. Next, when the air mix door 3 is set to the heating mode, the entire amount of the cooled and dehumidified air is heated by passing through the heater core 4 to become dehumidified warm air to the air mix chamber 11. Be guided. At this time, the mode door 5 is generally set to the foot blowing mode, and the dehumidified warm air blows out into the vehicle interior through the foot outlet 7 to warm the feet of the occupant. Lastly, when the air mix door 3 is set to the air mix mode, the air dehumidified and cooled by the evaporator 2 is distributed toward the heater core 4 and the bypass flow passage according to the opening degree of the air mix door 3. sink,
The hot air passing through the heater core 4 and the cool air passing through the bypass flow path are again joined and mixed in the air mix chamber 11 disposed downstream of the heater core 4 in the air. Therefore, by adjusting the opening degree of the air mix door 3, the mixing ratio of the warm air and the cool air changes, and the dehumidified temperature-controlled air adjusted to the desired temperature is supplied to the roof outlet 6 and the foot outlet 7. Can be. At this time, if the mode door 5 is set to the bi-level mode, it is possible to blow out the temperature-controlled air from both the outlets of the roof outlet 6 and the foot outlet 7 at this ratio.

As described above, according to the rear seat air conditioner of the present embodiment, since the heater core 4 is installed on the vehicle interior side, the warm air heated by the heater core 4 is more affected by the outside air temperature than before. Therefore, even when the outside air temperature is low, heat loss such as cooling the hot air again is prevented. Further, since the heater core 4 is installed on the vehicle interior side and the air mix door 3 is installed on the vehicle exterior side, the flow path bypassing the heater core 4 is located on the outdoor side, and this bypass flow The cool air passing through the road is quickly guided to the roof outlet without receiving the resistance of the air. Therefore, a sufficient amount of cool air can be obtained in the cooling mode.

In the above embodiment, the heater core 4 and the air mix door 3 are arranged in the horizontal direction, the air mix door 3 is arranged outside the room, and the heater core 4 is arranged inside the room. The layout of the air mixing door 4 and the air mixing door 3 may be arranged in the vertical direction, and the air mixing door may be arranged on the outside (lower side), and the heater core 4 may be arranged on the inside (upper side). In addition, the air conditioning unit for the rear seat is installed on the side wall portion side of the rear seat of the vehicle, but in other embodiments, an optimum position may be selected according to the type of the vehicle and the arrangement of other devices. In this embodiment, the blower fan 1 has been described as suctioning only the inside air. However, the outside air can be introduced by providing a damper for switching between inside air and outside air. In this embodiment, the blower fan 1 is of the double suction type, but may be of the single suction type. Further, if various sensors, a damper actuator, a control unit, and the like are provided, the air conditioner can be used as an automatic air conditioner.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a vehicle rear seat air conditioner according to an embodiment of the present invention.

FIG. 2 is a top view of the vehicle rear seat air conditioning unit according to the embodiment of the present invention.

FIG. 3 is a side view of a vehicle rear seat air conditioning unit according to an embodiment of the present invention.

FIG. 4 is a diagram for explaining another embodiment of the present invention.

FIG. 5 is a view showing an example of an arrangement of outlets of a conventional vehicle rear seat air conditioner.

FIG. 6 is a diagram showing the overall configuration of a conventional vehicle rear seat air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blower fan 2 Evaporator 3 Air mix door 4 Heater core 5 Mode door 6 Roof outlet 7 Foot outlet 8 Suction port 9 Blower case 10 Blower motor 11 Air mix chamber 12 Side trim 13 Outer panel 14 Cooler case 15 Heater case

Claims (2)

[Claims] 1. A vehicle rear seat air conditioner installed on a side wall of a vehicle rear seat space for air conditioning the vehicle rear seat space, wherein the air conditioner is disposed in a scroll-shaped blower case and receives power from a power supply. Blower fan that receives the power of, blows air from the suction port and feeds it, and an evaporator that is installed in a unit case connected to the air downstream side of the blower case and cools the air fed by the blower fan, A heater core disposed on the vehicle interior side in the unit case and heating air cooled by the evaporator; and an air mix door disposed on the vehicle exterior side of the unit case and adjusting an amount of air passing through the heater core, An air mix chamber for mixing the warm air heated by the heater core and the cool air bypassing the heater core; Located downstream of the air chamber
A vehicle rear, comprising: a mode door for switching among three discharge modes of a roof outlet, a foot outlet, and a bi-level; and a side trim for closing and closing the blower case and the unit case and the vehicle interior space. Air conditioning system for seats. 2. An air conditioner for a rear seat of a vehicle according to claim 1, wherein said roof outlet is located on the indoor side and said foot outlet is located on the indoor side.