KR20070066029A - A car rear air conditioning device - Google Patents

Abstract

A rear air conditioner for a vehicle is provided to introduce a maximum amount of hot air passing through a heater core via a floor outlet and introduce cold air via a vent outlet for discharging the hot air to leg parts of passengers and the cold air to head parts of the passengers in a mixing mode, thereby improving pleasant feeling of the passengers. A rear air conditioner for a vehicle includes a floor outlet(140) formed at an upper part of a heater core(400) and adjacent to a rear path of the heater core. An air induction element is mounted in the rear path for inducing air passing through the heater core toward the floor outlet. The air induction element is a vertical stepped part(123) formed at a case(100) with a stepped difference in the right and left directions for increasing an area of a path(121) adjacent to the floor outlet becomes wider than that of a path(122) remote from the floor outlet in the rear path.

Description

Rear air conditioning device for vehicles {A car rear air conditioning device}

1 is a cross-sectional view showing the configuration of a vehicle rear air conditioner according to the prior art.

Figure 2 is a perspective view showing the appearance of the case constituting the rear air conditioner for vehicles according to the present invention.

FIG. 3 is a cross-sectional view of the case of FIG. 2 cut vertically except for the vent outlet and the floor outlet in a state viewed from the direction "A"; FIG.

Figure 4 is a perspective view showing the installation state of the temperature control door according to the present invention in a view as seen in the direction "C" room by cutting in the direction "B" direction in FIG.

Figure 5 is an external perspective view of the temperature control door applied to FIG.

Figure 6 is a graph showing the temperature characteristics according to the position of the temperature control door according to the prior art.

7 is a graph showing the temperature characteristics according to the position of the temperature control door according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: case

110: ventilation passage

120: air flow path

130: vent exit

140: floor exit

200: blower unit

300: evaporator

400: heater core

500: temperature control door

The present invention relates to a rear air conditioner for a vehicle, and more particularly, in the mixing mode, the warm air passing through the heater core is introduced into the floor outlet as much as possible, and the cold air is introduced into the vent outlet to discharge the warm air to the lower body of the occupant. The present invention relates to a vehicle rear air conditioner capable of providing a comfortable riding environment to a passenger by allowing cold air to be discharged to the head of the passenger.

In general, a vehicle air conditioner includes a cooling system for cooling the interior of a vehicle, and a heating system for heating the interior of the vehicle. The cooling system compresses the refrigerant by a compressor driven by the engine and sends the refrigerant to the condenser, condenses the refrigerant by forced blowing of the cooling fan in the condenser, and then transfers the refrigerant to a receiver dryer, an expansion valve, and an evaporator. In the process of returning back to the compressor in turn, the air blown by the blower unit installed at the inlet end of the air conditioning case and the refrigerant passing through the evaporator are heat-exchanged, and the cold air blown air is discharged into the vehicle interior. Cool the room.

Meanwhile, the heating system heat-exchanges the air blown by the blower fan of the blower unit and the coolant passing through the heater core in the process of returning the coolant of the engine to the engine through the heater core, thereby blowing the warm air into the vehicle. By discharging to the interior, the vehicle interior is heated.

By the way, since the said air conditioner for a vehicle is comprised so that air for cooling or heating may be discharged from the vent duct installed in the instrument panel in front of a vehicle interior, it is called a vehicle with a large indoor space, for example, a luxury car, or a van or RV. In the case of a four-wheel drive vehicle, the cooling or heating effect is insufficient until the rear seat.

Therefore, in the case of a vehicle having a large indoor space as described above, in order to assist cooling and heating performance of the rear seat, a rear air conditioner (rear air) is additionally provided in a limited space of the side wall of the body on the rear wheel cover. Also known as a 'harmonic device'.

1 is a cross-sectional view showing the configuration of a vehicle rear air conditioner according to the prior art.

As shown, a vent duct having an air inlet 11 having internal and external air inlets 11a and 11b at one end thereof, and a vent duct for blowing air from the air passage 11 to the roof side of the vehicle (not shown). Vent outlet 12 in communication with the floor, and a floor outlet 13 in communication with a floor duct (not shown) for blowing air to the floor side of the vehicle, and the vent outlet 12 from the blow passage 11. And a case 10 forming one air passage 14 leading to the floor outlet 13.

In the blow passage 11, a blower unit 20 for forcibly introducing the inside and outside air through the inside and outside air inlets 11a and 11b is provided, and the air closest to the blower unit 20 is provided. The evaporator 30 is installed vertically in the flow path 14a, and the heater core 40 is installed substantially vertically at a predetermined interval on the downstream side of the evaporator 30, and the rear portion thereof is provided with the case 10. It is provided to have a rear air passage 14b while maintaining a constant interval.

Here, the member No. 31 is a condensate outlet for discharging condensate generated in the evaporator 30.

The air flow path between the evaporator 30 and the heater core 40 to block the air from entering the heater core 40 in the cooling mode, and also to enter the heater core 40 in the heating mode. Temperature control door 50 for blocking the rotation is provided so as to rotate around the shaft portion (51).

Here, the cooling mode, the heating mode and the mixing mode are determined according to the position of the door 50.

That is, when the door 50 is rotated to the position shown in the dotted line to close the air flow passage 14c, the heating mode is in the heating mode, and the door 50 is rotated to the position shown in the solid state to the heater core 40 side. In the case of blocking the air flow of the cooling mode, the door 50 is rotated to the position shown in the dashed line state, the mixing mode.

Here, in the mixing mode, a part of the cold air heat-exchanged through the evaporator 30 passes through the heater core 40 and the rest passes through the air passage 14c without passing through the heater core 40. In order to allow the warm heat exchanged through the heater core 40 and the cold air not passing through the heater core 40 to be mixed in a mixing space (MS) formed on the evaporator 30 and the heater core 40, the room is heated. To be discharged.

On the other hand, the arrangement relationship between the vent outlet 12 and the floor outlet 13 is as follows.

The floor outlet 13 is formed in a direction close to the blow passage 11 side, and the vent outlet 12 is provided so as to be opposite to the floor outlet 13.

Here, reference numeral 60 denotes a blowing mode switching door which is installed between the vent outlet 12 and the floor outlet 13 so as to be rotatable about the shaft 61, and closes the vent outlet 12 or closes the floor outlet 13. It is closed or serves to allow air to flow to both the vent outlet 12 and the floor outlet 13.

In the prior art, there is no problem in discharging cold and warm air into the room through the vent outlet 12 and the floor outlet 13 in the heating mode and the cooling mode, but the problem is exposed in the mixing mode.

This will be described in more detail as follows.

That is, in the mixing mode, cool air is discharged to the head of the occupant, and warm air is discharged to the lower body of the occupant, thereby providing a more comfortable ride to the occupant.

However, in the prior art, a portion of the cold air cooled while passing through the evaporator 30 in the mixing mode is heat-exchanged while passing through the heater core 40 and moves along the rear side flow path 14b of the heater core 40 to the warmer. The remaining cold air moves without passing through the heater core 40, and the warm air and cold air are partially mixed in the mixing space MS formed on the evaporator 30 and the heater core 40, so that the floor outlet 13 And the vent outlet 12. In this process, the warm air present in the mixing space MS is discharged to the vent outlet 12 along the inner wall surface of the right case 10a on the drawing, and the cool air is centered on the drawing. There was a problem of discomfort such as being discharged to the floor outlet 13 along the inner wall surface of the inner case (10b) formed to cause the warmth to be discharged to the head of the occupant.

The present invention was created to solve the above problems, in the mixing mode to let the warm air passed through the heater core to the floor outlet as much as possible, to allow the cold air to flow into the vent outlet to discharge the warmth to the lower body of the occupant In addition, it is an object of the present invention to provide a rear air conditioner for a vehicle to provide a comfortable environment for passengers by allowing cold air to be discharged to the head of the passenger.

In order to achieve the above object, the present invention provides a blower passage having an inlet / outer air inlet on one side and an air passage on the other side so as to be in communication with the blower passage and of the air flowing along the air passage. A case having a vent outlet and a floor outlet for discharging; A blower unit disposed in the blower passage to introduce the inside and outside air through the inside and outside air inlets; An evaporator installed on the air passage so as to be close to the blower unit to heat exchange the air forcedly blown by the blower unit to lower the temperature; A heater core installed on the downstream side of the air flow path of the evaporator so as to have a rear side flow path spaced apart from the inner surface of the case to increase the temperature by heat-exchanging air; In the rear air conditioner for a vehicle comprising a temperature control door installed between the evaporator and the heater core so as to rotate about the shaft portion to selectively open and close the front and upper flow path of the heater core formed in the heater core and the evaporator, The floor outlet is formed above the heater core and adjacent to the rear side flow path, and the rear side flow path is provided with air inducing means for guiding air passing through the heater core to the floor outlet. do.

Hereinafter, a preferred embodiment of a vehicle rear air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing the appearance of the case constituting the rear air conditioner for a vehicle according to the present invention, Figure 3 is a view of the remaining case except the vent outlet and the floor outlet in the state of the case of FIG. 4 is a cross-sectional view showing a vertical cut, Figure 4 is a partial perspective view showing the installation state of the temperature control door according to the present invention as a view cut in the direction of the "B" direction in the direction of the leader line "C" in FIG. Figure 5 is an external perspective view of the temperature control door applied to Figure 4, Figure 6 is a graph showing the temperature characteristics according to the position of the temperature control door according to the prior art, Figure 7 according to the position of the temperature control door according to the present invention A graph showing temperature characteristics.

The present invention is formed so as to be in communication with the blow passage (110) via the air passage (120) and the air passage 120 on the other side and the inside and outside air inlet (111, 112) and flows along the air passage A case 100 having a vent outlet 130 and a floor outlet 140 for discharging the air; A blower unit (200) disposed in the air passage (110) for introducing internal and external air through an internal and external air inlet; An evaporator (300) installed on the air passage (120) so as to be close to the blower unit (200) so as to heat-exchange the air forcedly blown by the blower unit (200); A heater core 400 spaced apart from the inner surface of the case 100 at a downstream side of the air flow path of the evaporator 300 so as to have a rear side flow path 120a to heat the air to increase the temperature; It is installed between the evaporator 300 and the heater core 400 so as to be rotatable around the shaft portion 510, the front passage 120b and the upper passage of the heater core 400 formed in the heater core 400 and the evaporator 300 ( It is applied to a vehicle rear air conditioner including a temperature control door 500 to selectively open and close 120c).

Here, when the door 500 is rotated to the position shown in the dotted line to close the air flow path 120b, the door is in the heating mode, and the door 500 is rotated to the position shown in the solid state to the heater core 400. In the case of blocking the flow of air in the cooling mode, the door 500 is in the mixing mode when rotated to the position shown in the dashed line state.

The member 310 is a condensate outlet for discharging condensate generated by the evaporator 300.

In the above configuration, the floor outlet 140 may be formed above the heater core 400 and adjacent to the rear side passage 120a.

The vent outlet 130 is formed at a position where most of the air flowed along the upper passage 120c of the heater core 400 is discharged to the room.

By forming at the proper position of the floor outlet 140 and the vent outlet 130 as described above, a part of the cold air passing through the evaporator 300 passes through the heater core 400 in the mixing mode again, and the heat exchanged to the rear side Guided along the flow path (120a) is discharged into the room through the floor outlet 140, the remaining cold air passing through the evaporator 300 passes through the upper flow path (120c) of the heater core 400, vent vent 130 It is discharged to the room through.

Accordingly, warm warm air flows into the floor outlet 140 and is discharged to the foot of the lower part of the occupant via a floor duct (not shown). Inflow is discharged to the head of the occupant via the vent duct (not shown) to eventually provide a comfortable ride to the occupant.

On the other hand, the present invention is provided with an air induction means for guiding the air passing through the heater core 400 to the floor outlet 140 in the rear channel 120a in the above configuration.

The air induction means may include the heater core (s) so that the area of the flow path 121 adjacent to the floor outlet 140 in the rear side flow path 120a is wider than the area of the flow path 122 far from the floor outlet 130. The stepped portion 123 is formed to be stepped from side to side in the vertical direction of the case 100 corresponding to the rear side of the 400.

As described above, by forming the stepped portion 123 stepwise from side to side over the up and down direction of the case 100 corresponding to the rear side of the heater core 400, a large-area flow passage 121 close to the floor outlet 140. In FIG. 2, air passing through the heater core 400 in the dotted line arrow direction shown in FIG. 2 is larger than the air passing through the flow path 122 (two dashed-dotted arrow directions) formed at a portion away from the floor outlet 140. 140).

Therefore, a larger amount of warm warm air passing through the heater core 400 flows into the floor outlet 140 and eventually discharges to the lower body of the occupant via the floor duct (not shown).

On the other hand, the present invention in the above-described embodiment, the floor outlet 140 is formed on the upper side of the heater core 400 and is formed adjacent to the rear side passage (120a) and the rear side passage (102a) It can be applied to the configuration provided with an air inducing means for guiding the air passing through the heater core 400 to the floor outlet 400, the air induction means has an area of the flow path close to the floor outlet of the rear flow path The stepped portion 123 may be formed stepwise from side to side in the vertical direction of the case corresponding to the rear side of the heater core 400 so as to be wider than the area of the flow path far from the floor outlet, and thus may be applied to the embodiment. In the mixing mode in which the temperature control door 500 is positioned such that the air passing through the evaporator 300 passes through the heater core 400 or through the upper passage 120c, the air passes through the evaporator 300. Of the above Side may be such that the baffle 520 of the partition wall shape is further formed on the top partial section of the temperature control door 500 to prevent flow stream for a portion of the air which flows into the flow passage (120c).

Since the baffle 520 acts as a resistor before the cold air passing through the evaporator 300 flows into the upper flow path 120c, the warmer heat exchanged through the heater core 400 in the mixing mode is the floor outlet 140. The hot air is discharged to the lower part of the occupant because it does not act as an obstacle for being discharged through the air, and the cold air is discharged to the head of the occupant, thereby providing a comfortable riding environment for the occupant.

In the present invention configured as described above, the temperature characteristics according to the position of the temperature control door in the mixing mode will be described with reference to FIGS. 6 and 7 by comparing the present invention with the prior art.

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는 온도조절도어의 개방 위치를 나타낸 것으로 도 3에서 상측 유로(120c)와 전방측 유로(120b)사이의 온도조절도어(500)가 회동할 수 있는 공간을 8등분하여 전방측 유로(120b)의 개방 정도를 나타낸 것이다.Figure 6 is a graph showing the temperature characteristics according to the position of the temperature control door according to the prior art, Figure 7 is a graph showing the temperature characteristics according to the position of the temperature control door according to the present invention, ▲ mark is the floor outlet side temperature change Indicates the change in temperature at the vent outlet side, and indicates

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3 shows the open position of the temperature control door. In FIG. 3, the space between the upper flow path 120c and the front flow path 120b can be rotated by equally divided into 8 parts of the front flow path 120b. The degree of opening is shown.

As a result of the temperature test in the related art, as shown in FIG. 6, as the opening degree of the front side passage 120b increases, the temperature at the vent outlet 130 is higher than the temperature at the floor outlet 140. Could.

However, as a result of testing in the embodiment of the present invention, as shown in Figure 7, not only the opening degree of the front side flow path (120b) is smaller, but also becomes larger and larger than the temperature at the vent outlet 130 floor outlet ( It can be seen that the temperature at 140) was high.

Therefore, in the present invention, the warmer warm air passing through the heater core 400 is introduced into the floor outlet 140 and eventually discharged to the lower body of the occupant through the floor duct (not shown). In the end, it is possible to provide a comfortable riding environment for the occupants.

As described above, according to the vehicle rear air conditioner according to the present invention, in the mixing mode, the warmth passing through the heater core is introduced into the floor outlet as much as possible, and the cold air is introduced into the vent outlet to warm the body to the lower body of the occupant. It is advantageous to provide a comfortable environment for riding passengers by discharging the cold air is discharged to the head of the occupant.

Claims (3)

A blow passage 110 having an inlet and an outside air inlet on one side and an air passage 120 on the other side are formed to communicate with the blow passage 110 and for discharging air flowing along the air passage. A case 100 having a vent outlet 130 and a floor outlet 140; A blower unit (200) disposed in the blower passage to introduce the inside and outside air through the inside and outside air inlets; An evaporator (300) installed on the air passage so as to be close to the blower unit (200) to heat exchange the air forcedly blown by the blower unit to lower the temperature; A heater core 400 spaced apart from an inner surface of the case 100 at a downstream side of the air flow path of the evaporator so as to have a rear side flow path 120a to heat the air to increase the temperature; A temperature control door 500 is installed between the evaporator and the heater core so as to be rotatable about the shaft, and selectively opens and closes the front passage 120b and the upper passage 120c of the heater core formed on the heater core and the evaporator. In a vehicle rear air conditioner, The floor outlet is formed above the heater core and adjacent to the rear flow path. And the air inducing means for guiding air passing through the heater core to the floor outlet is provided at the rear side flow path. The method of claim 1, The air guiding means is stepped stepwise to the left and right in the vertical direction of the case corresponding to the rear side of the heater core so that the area of the flow path close to the floor outlet in the rear flow path is wider than the area of the flow path far from the floor exit. Vehicle rear air conditioner, characterized in that formed by forming a portion. The method according to claim 1 or 2, In the mixing mode in which the temperature control door 500 is positioned such that the air passing through the evaporator 300 passes through the heater core 400 or passes through the upper passage 120c, the air passed through the evaporator 300. A vehicle rear baffle 520 is further formed in a portion of the upper surface of the temperature control door 500 so as to hinder a flow of air to a part of the air flowing into the upper flow path 120c. Air conditioning system.

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