KR20090063368A - Air conditioner for vehicle - Google Patents

Abstract

An air-conditioner for a vehicle is provided to set an air guide above a heater core of a heater unit case to make flow of air flowing in the space above the heater core uniform so as to achieve uniform temperature distribution of cold air or hot air discharged to the internal space of the vehicle. An air-conditioner for a vehicle includes a blower unit, an evaporator unit(230) and a heater unit case(253). The blower unit inhales external air. The evaporator unit is connected to the blower unit and includes an evaporator(233). The heater unit case includes an air inlet(253d) which inhales air passing through the evaporator. The heater unit case includes a heater core(257) and a temperature control door(255). The temperature control door selectively provides the air flowing from the evaporator unit case. An air guide(270) is located at a predetermined point of a flow path(P2) of the heater unit case and regulates flow of air blowing from the evaporator unit. The air guide blocks a part of the flow path.

Description

Automotive Air Conditioning Unit {AIR CONDITIONER FOR VEHICLE}

The present invention relates to a vehicle air conditioner, and more particularly, to a vehicle air conditioner for reducing the flow variation of the air flowing inside the air conditioner to uniform the temperature distribution.

In general, a vehicle air conditioner is a device for cooling or heating an interior of a vehicle by introducing air from outside or inside a vehicle to heat or cool the air and blow it into the interior of the vehicle.

Such an air conditioner includes a three-piece type air conditioner, an evaporator unit and a heater unit independently configured with a blower unit, an evaporator unit, and a heater unit. Semi-Center type air conditioners integrally integrated into the case, and blower units, evaporator units, and heater units may be classified into a center type air conditioner integrally configured in one case. Can be.

1 is a perspective view schematically showing the configuration of a three-piece type air conditioner according to the prior art, and FIG. 2 is a cross-sectional view taken along the line II-II 'of FIG.

1 and 2, the air conditioner 1 includes a blower unit 10 for sucking air, an evaporator unit 30 to which the blower unit 10 is connected to one side, and And a heater unit 50 connected to one side of the evaporator unit 30.

The blower unit 10 includes a blower unit case 11, an electric motor (not shown) installed inside the blower unit case 11, and a blowing fan (not shown) rotated by a driving force of the electric motor. The blower unit case (11) has a car seal. The inside air inlet 11a and the outside air inlet 11b for introducing air inside and outside are formed. The blower door member 17 is rotatably installed inside the blower unit case 11 to selectively open the air inlet 11a and the air inlet 11b.

The evaporator unit 30 includes an evaporator unit case 31 connected to the blower unit case 11 and an evaporator 33 installed in the evaporator unit case 31 to cool the inside or outside air introduced by the blower fan. do.

The heater unit 50 is installed in the heater unit case 51 and the heater unit case 51 having the air suction port 51a through which the air cooled through the evaporator 33 flows in and flows in through the evaporator unit case 31. Heater core 53 for heating the air.

The heater unit case 51 includes a temperature control door 71 for selectively introducing the air sucked from the blower unit 10 and blown through the evaporator 33 into the heater core 53.

In addition, the heater unit case 51 has a defrost vent (91) for guiding the air discharge toward the car window to remove the frost of the car window, and a face vent for guiding the air discharge toward the upper half of the vehicle interior ( face vent (93) and floor vent (95) for directing air exhaust towards the lower half of the vehicle interior.

Replacement of the air flow to each vent 91, 93, 95 is done by a defrost door 73, a face door 75, and a floor door 77.

Each vent 91, 93, 95 is provided with ducts for respectively discharging air conditioned air into a desired area of the vehicle interior.

A defrost duct 101 is connected to the defrost vent 91 to discharge the heat-exchanged air toward the upper half of the vehicle interior, and a face duct (face duct) is provided to the face vent 93 to discharge the heat-exchanged air to the window side of the vehicle. 103: face duct) is connected.

The conventional air conditioner 1 as described above has a problem that the flow of air supplied into the heater unit case 51 is not uniform. The problem will be described in more detail with reference to FIG. 3.

3 is a cross-sectional view taken along the line III-III 'of FIG.

Referring to FIG. 3, air sucked through the blower unit 10 passes through the evaporator 33 of the evaporator unit 30 and then flows into the heater core 53 upstream space in the heater unit case 51. . At this time, the upstream side air of the heater core 53 introduced into the heater unit case 51 increases in the air pressure as it moves away from the air inlet 51a. When the heater core 53 passes through the heater core 53 in this state, the heater There is a problem of uneven distribution of left and right winds supplied to the core 53 side.

That is, the air supplied to the upstream side of the heater core 53 is drawn toward the L display portion away from the air intake port 51a as compared to the F display portion close to the air intake port 51a, so that the L display portion is colder than the F display portion. A lot.

When supplied to the heater core 53 side in such a state, the temperature at the L display portion side passing through the heater core 53 is lower than the temperature at the F display portion side passing through the heater core 53 and passes through the heater core 53. Hot air left and right temperature deviation occurs.

In addition, even when cold air is discharged directly through the vents 101 and 103 95 without passing through the heater core 53 by the cooling mode driving, the amount of cold air on the L display side is the amount of cold air on the F display side. More and left and right temperature deviation occurs.

It is an object of the present invention to provide a vehicle air conditioner for preventing the temperature deviation of the air discharged to the interior of the vehicle by evenly distributing the air volume supplied to the heater core.

The air conditioner for automobiles of the present invention for achieving the above technical problem is a blower unit for sucking outside air, an evaporator unit connected to the blower unit, the evaporator unit is built therein, and the air passing through the evaporator A vehicle air conditioner including a heater unit having a suction air inlet, and a heater unit case in which a temperature control door for selectively introducing a heater core and air supplied from the evaporator unit case into the heater core is provided. A certain position of the flow path of the heater unit case includes an air guide for regulating the flow of air blown from the evaporator unit, the air guide is perpendicular to the direction of the air sucked through the air inlet, a portion of the flow path It is formed to block.

The air guide may be installed in a space upstream of the heater core in the heater unit case.

The temperature control door is formed with an air guide passage hole through which the air guide passes so that the temperature control door rotates without interference with the air guide, and the air guide has a rotation hole corresponding to the rotation angle of the temperature control door. Can be formed.

The air guide may further include a sealing jaw for sealing with the temperature control door.

The heater unit case may include a first case and a second case, and the air guide may further include a coupling jaw fitted into a coupling groove formed in a thickness portion of the first case and the second case.

According to the air conditioner according to an embodiment of the present invention, the air guide is installed in the space upstream of the heater core of the heater unit case, the cold air discharged to the interior of the vehicle by uniformly flowing the air flowing through the space upstream of the heater core Or there is an advantage to even the temperature distribution of the warm air.

In addition, by forming a sealing jaw on one side of the air guide can improve the sealing effect between the temperature control door.

In addition, there is an advantage in that the coupling grooves are formed in the thickness portions of the first case and the second case constituting the heater case, and the coupling jaw is formed in the air guide to improve the bondability of the air guide.

In addition, an air guide through-hole is formed on one side of the temperature control door, and a part of the temperature control door is inserted into the air guide to form a rotating hole to rotate so that the temperature control door can smoothly rotate without interfering with the air guide. There is an advantage.

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

4 is a perspective view schematically illustrating a configuration of a three-piece type air conditioner according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along the line VV ′ of FIG. 4. .

4 and 5, in the air conditioner 200, air sucked into the blower unit case 211 by the blower unit 210 is blown into the evaporator unit case 231 of the evaporator unit 230. The blown air is cooled while passing through the evaporator 233 and flows upstream of the heater core 257 in the heater unit case 253 of the heater unit 250 through the connection member 251.

The temperature control door 255 is rotatably supported inside the heater unit case 253 to adjust the air volume ratio between the warm air passing through the heater core 257 and the cold air passing through the flow path P1 according to the rotational position thereof. do. This adjusts the temperature of the air blown into the vehicle interior.

A sub-temperature control door 256 is further installed on the downstream side of the heater core 257 to adjust the air volume of the heat exchanged air by the heater core 257 as necessary, together with the auxiliary temperature control function. This is done.

The temperature-controlled air is discharged to the interior of the vehicle through the discharge port 253c. A vent member and a duct member (not shown) are connected to the discharge port 253c to guide the temperature regulated air to be discharged toward the vehicle window, the upper half of the vehicle interior, or the lower half of the vehicle interior.

As described above, the air supplied upstream of the heater core 257 inside the heater unit case 253 is regulated by an air guide 270 that divides a part of the flow path P2 of the heater unit case 253 to control the heater. Evenly distributes the amount of air supplied to the core 257 side.

Figure 6 is an exploded perspective view showing a separate configuration of the heater unit of the air conditioner according to an embodiment of the present invention, Figure 7 is to explain the structure of the air guide of the air conditioner according to an embodiment of the present invention Some detached perspective view for.

6 and 7, in the heater unit 250, the first case 253a and the second case 253b form a pair to form the discharge port 253c, and the flow paths P1 and P2 therein. It includes a heater unit case 253 to form a. On one side of the second case 253b, an air inlet 253d through which air supplied from the evaporator unit 230 (see FIG. 4) is sucked is formed.

The heater unit 250 is installed in the heater unit case 253 in a substantially central portion in a substantially horizontal direction in the heater core 257 and rotatably installed on one side of the heater core 257 through an air inlet 253d. And a temperature control door 255 for selectively introducing the sucked air to the heater core 257 side.

In addition, the heater unit 250 is formed of a plate-shaped body to block a part of the flow path P2, and flows into the heater core 257 upstream of the inside of the heater unit case 253 through the air suction port 253d. It further includes an air guide 270 perpendicular to the air flow direction (A).

The temperature control door 255 is installed in a direction orthogonal to the air guide 270, and an air guide passage hole 255b is formed so that the air guide 270 passes through a portion thereof. On the other hand, the air guide 270 is formed with a rotating hole (271) is inserted to rotate a portion of the temperature control door 255 to facilitate the rotation operation of the temperature control door 255. The rotation hole 271 may be formed in a fan shape to form a predetermined angle so as to correspond to the rotation range of the temperature control door 255.

A sealing jaw 273 for sealing with the temperature control door 255 may be further formed on the side surface of the air guide 270. At this time, the sealing member 255c may be further formed at the edge of the temperature control door 255 to increase the sealing effect.

The air guide 270 may be installed between the first case 253a and the second case 253b. In this case, the coupling groove 253e is formed in the thickness portion T of the first and second cases 253a and 253b. ) Is formed, and the coupling jaw 275 inserted into the coupling groove 253e is formed in the air guide 270.

The air guide 270 may be formed to block 50% to 70% of the area of the air intake port 253d (see FIG. 5). Thus, a part of the air sucked into the air inlet 253d is hit by the air guide 270 to be directly discharged to the flow path P1 side or supplied to the heater core 257 side, and then heat-exchanged and discharged to the flow path P1 side.

Meanwhile, some air passing through the air passage hole 277 formed between the one end E of the air guide 270 and the inner wall W of the heater case 253 is directly discharged to the flow path P1 or the heater core ( 257) and then heat exchanged to discharge to the flow path (P1) side.

As described above, the air supplied to the heater core 257 upstream of the heater unit case 253 through the air guide 270 is evenly distributed in air volume, and the left and right temperature deviations of the cold or warm air discharged through the discharge port 253c. Will be reduced. As a result, the temperature distribution of cold or warm air discharged to the vehicle interior becomes uniform.

Figure 8a is a view for explaining the relationship between the temperature values at the same vent position according to the rotation angle of the temperature control door according to the prior art, Figure 8b is according to the rotation angle of the temperature control door according to one embodiment of the present invention It is a figure for demonstrating the relationship of the temperature values in the same vent position.

In FIGS. 5, 8A and 8B, M / W, 1/16 to 15/16, and M / C indicate the rotational positions of the temperature regulating doors 71 and 255. When the temperature control doors 71 and 255 are located at M / W, a maximum heating state is achieved, and when the temperature control doors 71 and 255 are located at M / C, a maximum cooling state is achieved. On the other hand, when the temperature control doors 71 and 255 are located at 1/16 to 15/16, air is discharged to the interior of the vehicle by adjusting the air volume ratio between the warm air passing through the heater cores 53 and 257 and the cold air passing through the flow path P2. Is adjusted to the temperature desired by the user.

In the drawing, LH, LC, RC, and RH are the positions where the air is discharged to the vehicle interior, respectively, where LH is the left window side of the vehicle interior, RH is the right window side of the vehicle interior, and LC is the central portion of the vehicle interior. The left side and RC represent positions of the vents located at the center right side of the vehicle interior, respectively (see Fig. 1).

In the related art, as shown in FIG. 8A, it can be seen that the intervals of the lines representing the values of the temperatures of the rotation angles of the temperature control door 71 for each of the vent positions LH, LC, RC, and RH are widely spaced. there was.

Unlike this, according to an embodiment of the present invention, as shown in Figure 8b it can be seen that the separated distance of each line is narrowed. Through this, it was confirmed that the temperature deviation of the left and right window side and the center left and right of the car interior is reduced compared to the conventional.

1 is a perspective view schematically showing the configuration of a three-piece type air conditioner according to the prior art.

2 is a cross-sectional view taken along the line II-II 'of FIG.

3 is a cross-sectional view taken along the line III-III 'of FIG.

4 is a perspective view schematically showing the configuration of a three-piece type air conditioner according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along the line VV ′ of FIG. 4.

FIG. 6 is an exploded perspective view illustrating a configuration of a heater unit of an air conditioner according to an embodiment of the present invention.

7 is a partially separated perspective view for explaining the structure of the air guide of the air conditioner according to an embodiment of the present invention.

8A is a view for explaining the relationship between the temperature values at the same vent position according to the rotation angle of the temperature control door according to the prior art.

8B is a view for explaining the relationship between the temperature values at the same vent position according to the rotation angle of the temperature control door according to one embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

200: air conditioner 210: blower unit

211 blower unit case 230 evaporator unit

231: Evaporator Case 233: Evaporator

250: heater unit 253: heater unit case

253a, 253b: 1st and 2nd case 253c: discharge port

253e: coupling groove 255: temperature control door

255b: air guide through hole 270: air guide

271: rotating hole 273: sealing jaw

275: engaging jaw P2: euro

Claims (5)

A blower unit 210 for sucking outside air, an evaporator unit 230 connected to the blower unit 210 and having an evaporator 233 built therein, and air passing through the evaporator 233 are sucked in. A heater having an air intake port 253d therein and a heater core 257 therein and a temperature control door 255 for selectively introducing air supplied from the evaporator unit case 231 into the heater core 257. In the automotive air conditioner comprising a unit case 253, A predetermined position of the flow path P2 of the heater unit case 253 includes an air guide 270 for regulating the flow of air blown from the evaporator unit 230, the air guide 270 is the air inlet A vehicle air conditioner, which is formed at a right angle with the air direction A sucked through 253d, and blocks a portion of the flow path P2. The air conditioner of claim 1, wherein the air guide 270 is disposed in an upstream space of the heater core. The air guide passage hole 255b of claim 2, wherein the air guide 270 penetrates the temperature control door 255 so that the temperature control door 255 rotates without interfering with the air guide 270. Is formed, The air guide device for a vehicle, characterized in that the rotating hole 271 corresponding to the rotation angle of the temperature control door 255 is formed in the air guide (270). 4. The air conditioner of claim 3, wherein the air guide (270) further includes a sealing jaw (273) for sealing with the temperature control door (255). The method of claim 1, wherein the heater unit case 253 is composed of a first case 253a and a second case 253b, the air guide 270 is the first case 253b and the second case ( Automotive air conditioning apparatus, characterized in that the coupling jaw (275) is fitted to the coupling groove (253c) formed in the thickness portion (T) of the 253b).

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