JP3680442B2 - Air conditioning system for rear seats of vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle rear seat air conditioner that independently performs air conditioning on the rear seat side of a large vehicle such as a one-box vehicle.
[0002]
[Prior art]
For example, in a vehicle with a large rear space such as a one-box vehicle, a rear air conditioner is installed in addition to the front air conditioner for the purpose of improving the comfort of the rear seat passenger by independently air-conditioning the rear seat. May have been.
Therefore, for example, a conventional rear seat air conditioner described in 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 side of the rear seat of the vehicle, and includes a blower fan, a heater core, an evaporator, a blowing mode replacement door, and an air mix damper.
[0003]
The rear seat air conditioning unit is connected to the air inlet 51, the roof air outlet 52, and the foot air outlet 53 arranged in the passenger compartment through a duct, and the roof air outlet 52 and the rear floor surface arranged near the ceiling. The conditioned air is blown out from the foot outlets 53 disposed in the vicinity.
[0004]
[Problems to be solved by the invention]
As shown in FIG. 5, in the conventional vehicle rear seat air conditioner, the blower fan 54 is of a single suction type and is configured to introduce only the inside air sucked from the suction port. In such a vehicle rear seat air conditioning unit, a space 60 is formed between each outer case 59 and each unit case constituting the outer wall of the vehicle body, and air stays in the space 60. Become. Since the air staying in the space 60 is adjacent to the outside air through only one outer panel 59, it is easily affected by the temperature of the outside air, for example, it becomes extremely high in the summer and very in the winter. It becomes low temperature. Therefore, even if the air is cooled by the evaporator 55 during the cooling operation in summer, it is reheated by heat exchange with the high-temperature air convection in the space 60, thereby reducing the cooling efficiency. Problem arises. On the other hand, the air heated by the heater core 56 in the winter season is also cooled again by performing heat exchange with the extremely low temperature air staying in the space 60, thereby reducing the heating efficiency. Arise. Further, in the single suction type fan as shown in FIG. 5, a sufficient air volume cannot be secured due to space limitations, and the blower fan 54 must be rotated at a high speed in order to secure a sufficient air volume. Therefore, there is a problem that the noise is increased.
[0005]
In view of such problems, the present invention circulates convection air in the space 60 formed between the outer panel 59 and each unit case, and prevents a decrease in the cooling capacity and the heating capacity as described above. An object of the present invention is to provide an air conditioner for a rear seat of a vehicle capable of ensuring a sufficient air volume and thus reducing noise.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention of claim 1, the blower fan (1) is a double-suction type fan, and from one side, the air inside the vehicle compartment is formed in a part of the side trim (12). While sucking in through the mouth (8), convection air is also sucked between the side trim (12) and each unit case, and the outer panel (13) and each unit case forming the outer wall of the body from the other side A configuration is adopted in which air staying in the space is circulated by sucking air staying between the two. By adopting such a configuration, it is possible to circulate extremely high temperature air or low temperature air staying in the space (17) between the outer panel (13) and each unit case. Since hot air or extremely low temperature air does not stay, the air cooled by the evaporator (2) during cooling is hot air that stays in the space (17) as in the prior art. Therefore, it is possible to prevent the cooling efficiency from being lowered. Also, during heating in winter, the air heated by the heater core (4) is not affected by the extremely low temperature air staying in the space (17) as in the prior art. Decrease in heating efficiency can be prevented. In addition, since the blower fan (1) is of the double suction type, a sufficient air volume can be secured, so it is not necessary to rotate the blower fan at a high speed when securing the necessary air volume. The noise of the entire air conditioner can be reduced.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a vehicle rear seat air conditioner 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, 6 Indicates a roof outlet, 7 indicates a foot outlet, and 8 indicates an inlet.
[0008]
The blower fan 1 is a double-suction type fan, which is arranged in a scroll-shaped blower case 9 and rotates by receiving a rotational force from a blower motor 10 that receives a driving power from an in-vehicle battery and rotates. Sucks the air in the passenger compartment from the suction port 8 and sucks the air in the space 18 between each unit case and the side trim 12. Also, the air in the space 17 between each unit case and the outer panel 13 is sucked from the other side, and the air sucked from both is pumped in the direction of the evaporator 2 disposed in the cooler case 14 on the downstream side. It is. The evaporator 2 is disposed in a cooler case 14 connected to the air downstream side of the blower case 9, and heat is exchanged between the refrigerant passing through the blower fan 1 and the air pumped by the blower fan 1. Cooling. A heater case 15 is connected to the air downstream side of the cooler case 14, and the heater core 4 is disposed inside the vehicle interior and the air mix door 3 is disposed outside the vehicle interior in the heater case 15. The heater core 4 exchanges heat between the engine cooling water and the cold air that has passed through the evaporator 4 to heat the cold air. The air mix door 3 can be set to an arbitrary position (air mix mode) between a position (MAX HOT) for guiding the total air amount to the heater core 4 and a position (MAX COOL) for guiding the total air amount to the bypass flow path. it can. And the position where the warm air and cold air which passed the heater core 4 and the bypass channel merge becomes the air mix chamber 11, and cold air and warm air are mixed. Further, on the air downstream side of the air mix chamber 11, the conditioned air mixed in the air mix chamber 11 is guided to the roof side air outlet located near the ceiling and the foot side air outlet located near the rear floor. A foot outlet 7 leading to the outlet is disposed, and a mode door 5 is installed at this branch point. The mode door 5 has a total amount of air at an arbitrary position between the roof blowing mode for guiding the total air amount to the roof outlet 6, the foot blowing mode for guiding the total air amount to the foot outlet 7, and both modes. It is possible to select and set from three blowing modes including a bi-level mode that divides into a desired ratio. 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 has a side window. Avoid the pillar part.
[0009]
Next, the operation of the rear seat air conditioner having the above-described configuration will be described. When the passenger turns on the switch for the rear seat air conditioner, the blower motor 10 that receives the power supplied from the vehicle-mounted battery rotates and the blower fan 1 rotates. Here, the blower fan 1 is a double-suction fan, and air from the passenger compartment side is sucked from the passenger compartment side of the blower fan 1 through a suction port 8 formed in a part of the side trim 12. At the same time, convection air is sucked between the side trim 12 and each unit case. On the other hand, convection air is sucked from the outside of the passenger compartment of the blower fan 1 between each unit case and the outer panel 13 forming the outer wall of the body. Thus, the total amount of air sucked by the rotation of the blower fan 1 passes through the evaporator 2. For this reason, when the evaporator 2 operates, the total amount of air is cooled and dehumidified. 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 flow path and is guided to the roof outlet duct. At this time, the mode door 5 is generally set to the roof blowing mode, and the cold air that has passed through the bypass channel is guided to the roof outlet 6 and blown out into the vehicle compartment with little resistance. 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 and becomes dehumidified warm air to the air mix chamber 11. Led. The mode door 5 at this time is generally set to the normal foot blowing mode, and the dehumidified warm air blows out into the passenger compartment through the foot outlet 7 and warms the feet of the passengers. Finally, 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 path according to the opening of the air mix door 3. The warm air that has passed through the heater core 4 and the cool air that has passed through the bypass flow path are recombined and mixed in the air mix chamber 11 disposed on the air downstream side of the heater core 4. Therefore, by adjusting the opening degree of the air mix door 3, the mixing ratio of hot air and cold air changes, and the dehumidified temperature adjusted air adjusted to a desired temperature is supplied to the roof outlet 6 and the foot outlet 7. Can do. At this time, if the mode door 5 is set to the bi-level mode, the temperature-controlled air can be blown out from the outlets of the roof outlet 6 and the foot outlet 7 at this rate.
[0010]
Thus, according to the rear seat air conditioner of the present embodiment, it is possible to circulate extremely hot air or low temperature air staying in the vehicle compartment outer space 17 between the outer panel 13 and each unit case. In this space, no very high temperature air or very low temperature air stays, so that the air cooled by the evaporator 2 is cooled in the vehicle interior outer space 17 during cooling. Since it is not affected by the staying high-temperature air, it is possible to prevent the cooling efficiency from being lowered. Further, during heating in winter, the air heated by the heater core 4 is not affected by extremely low temperature air staying in the passenger compartment outer space 17 as in the prior art. Can be prevented. In addition, since the blower fan 1 is of the double suction type, a sufficient air volume can be secured, so that it is not necessary to rotate the blower fan at a high speed even when the necessary air volume is secured. Overall noise can be reduced.
[0011]
In the above-described embodiment, the layout of the heater core 4 and the air mix door 3 is arranged in the horizontal direction, the air mix door 3 is arranged on the outdoor side, and the heater core 4 is arranged on the indoor side. The layout of the mix door 3 may be arranged in the vertical direction, the air mix door may be arranged on the outdoor side (lower side), and the heater core 4 may be arranged on the indoor side (upper side). The rear seat air conditioning unit is installed on the side wall of the vehicle rear seat, but in another embodiment, an optimal position may be selected according to the type of vehicle and the arrangement of other devices. Further, in the present embodiment, the blower fan 1 has been described as sucking only the inside air, but it is also possible to introduce outside air by providing a switching damper between inside air and outside air. In the present embodiment, the blower fan 1 is of the double suction type, but may be of the single suction type. Furthermore, if various sensors, a damper actuator, a control unit, and the like are provided, it can be used as an auto air conditioner.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a vehicle rear seat air conditioner according to an embodiment of the present invention.
FIG. 2 is a view from the top of the vehicle rear seat air conditioner according to the embodiment of the present invention.
FIG. 3 is a side view of the vehicle rear seat air conditioner according to the embodiment of the present invention.
FIG. 4 is a diagram showing an example of the arrangement of outlets of a conventional vehicle rear seat air conditioner.
FIG. 5 is a diagram showing an overall configuration of a conventional vehicle rear seat air conditioner.
[Explanation 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 11 Air Mix Chamber 12 Side Trim 13 Outer Panel 16 Car Interior 17 Car Outer Space 18 Car Interior space

Claims (1)

A vehicle rear seat air conditioner installed on the side wall side of the vehicle rear seat space for air conditioning of the vehicle rear seat space,
A blower fan that is arranged in a scroll-shaped blower case, receives power from a power supply, sucks air from the suction port, and pumps it.
An evaporator that is installed in a unit case connected to the air downstream side of the blower case and that cools the air pumped by the blower fan;
A heater core that heats the air that is disposed in the unit case and is cooled by the evaporator;
An air mix door arranged in the unit case for adjusting the amount of air passing through the heater core;
An air mix chamber for mixing hot air heated by the heater core and cold air bypassing the heater core;
A mode door that is arranged on the air downstream side of the air mix chamber, and switches between three discharge modes of a roof outlet, a foot outlet, and a bi-level;
A side trim that shuts off the blower case and the unit case, and the vehicle interior space;
The blower fan sucks air from the vehicle interior side and air between the unit case and the side trim from one side, and from the other side between the unit case and the outer panel constituting the outer wall of the vehicle. A rear-seat air conditioner characterized by being a double-suction fan that sucks in the air.

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