JP3895472B2 - Air conditioner for automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automotive air conditioner in which a temperature is adjusted by forming a three-layer flow by arranging two cold airs above and below a warm air in a case.
[0002]
[Prior art]
In general, an air conditioner for an automobile has an intake unit that introduces internal and external air, a cooler unit that cools the introduced air, and a heater unit that heats the introduced air. These three units are arranged in the left-right direction of the vehicle. It is well known that they are united in series and installed in a narrow space inside the instrument panel in the passenger compartment. However, since this air conditioner for automobiles connects three units in series, the overall size of the apparatus is increased, and mounting in a small vehicle is not preferable because the narrow interior space of the vehicle is further reduced. In particular, the unit is placed up to the feet of the passenger seat, so it becomes narrow.
[0003]
On the other hand, as shown in FIGS. 16 and 17, an evaporator (not shown) or a heater core 4 is called a vertical type in which a heater core 4 is provided so as to stand side by side in the longitudinal direction of the vehicle. is there. In such an apparatus, the cooler unit and the heater unit are integrated, and the evaporator and the heater core 4 are arranged close to each other to achieve compactness.
[0004]
The air cooled by the evaporator is sent from the left side in the figure, and is divided into an air flow that passes through the heater core 4 and an air flow that bypasses the heater core 4 and flows through the mix door 15. In the apparatus of FIG. 17, in order to shorten the distance between the evaporator and the heater core 4, the mix door 15 is a flat plate-like door, and the temperature control is performed by sliding substantially up and down.
[0005]
Here, the “evaporator” is, as is well known, a low-temperature and low-pressure refrigerant decompressed by an expansion valve or the like in a cooling cycle circulates inside, and cools the introduced air by heat exchange with the refrigerant. is there. The “heater core” is one in which high-temperature engine cooling water circulates inside and heats the air introduced therein by heat exchange with the high-temperature engine cooling water.
[0006]
Then, the warm air heated by the heater core 4 and the cold air flowing by bypassing the heater core 4 are mixed in the mix zone 7. The mixed air has a predetermined temperature and is distributed toward the vehicle interior from the vent outlet Fv, the foot outlet Ff, etc. according to various air distribution modes, or cool air without the mixing. And it is blown out with warm air. Here, the temperature of the cold air or the hot air blown out from each outlet is controlled by the position of the mix door 15.
[0007]
The various air distribution modes include a vent mode (a mode in which cool air is blown to the upper body of the occupant), a bi-level mode (a mode in which cool air is blown to the upper body of the occupant and warm air is blown to the lower body), a defrost mode (Mode to clear cloudy front and side window glass), foot mode (mode to blow warm air to occupant's lower body) or differential-foot mode (mode to blow warm air to occupant's lower body while clearing cloudy window) There is.
[0008]
Among these modes, in the vent mode, air is distributed in the upper part of the passenger compartment, and therefore the vent outlet Fv is preferably provided in the upper part of the case C so that the duct can be shortened. In such a case, since the air is distributed in the lower part of the vehicle interior, the foot outlet Ff is preferably provided in the lower part of the case C.
[0009]
Therefore, in the vertically-installed automobile air conditioner installed in the instrument panel in the front part of the passenger compartment, the vent air outlet Fv is provided in the upper part of the case C, and the foot air outlet Ff is provided in the lower part. And in such an apparatus, since the flow path through which air passes can be shortened, it is possible to ensure a small air flow resistance and a high air volume.
[0010]
As described above, in the vertically-installed automobile air conditioner, the vent outlet Fv is opened in the vicinity of the side through which the cold air flows, and the foot outlet Ff is warm air heated by the heater core 4. In the combined mode in which cold air and hot air are blown out from the upper and lower outlets, such as in the bi-level mode, the temperature difference between the upper and lower sides is generally large. Tend to be. Moreover, the more compact the front and rear dimensions of the case, the more difficult it is to secure a sufficient space for mixing cold air and hot air in the case, and the difference between the upper and lower temperatures is more likely.
[0011]
For this reason, as shown in FIGS. 16 and 17, the mix door 15 is composed of two first and second mix doors 15a and 15b, and the upper cold air passage Bu, the hot air passage 6, and the lower cold air passage. A structure is known in which Bl is formed and the opening / closing control is performed by two mix doors 15a and 15b (see Japanese Patent Laid-Open No. 9-175147). In such an apparatus, by arranging two cool airs above and below the warm air in the case C, a three-layer flow can be formed to improve the air mix. That is, it is possible to increase the cool air flowing down the case through the lower cool air passage Bl, and to obtain a desired temperature characteristic by reducing the temperature difference between the upper and lower sides while reducing the size.
[0012]
[Problems to be solved by the invention]
By the way, in the automobile air conditioner in which the three-layer flow as described above is formed, the air cooled by the evaporator bypasses the heater core 4 in the full cooling mode and in the vent mode. In the drawing, the air flows through the upper cold air passage Bu and the lower cold air passage Bl in the direction of the arrow and flows toward the vent outlet Fv.
[0013]
However, among these, the air that has passed through the lower cold air passage Bl is guided upward so as to lick the surface of the heater core 4, and is blown out from the vent outlet Fv through the vent duct (not shown) into the vehicle interior. There was a problem that the temperature of the blown air at the time of full cool would rise.
[0014]
In order to prevent such heat reception from the surface of the heater core 4, it is conceivable to close the second mix door 15 b that adjusts the opening of the lower cold air passage Bl during a full cool. However, assuming that the mix doors 15a and 15b are gradually moved from the full hot side to the full cool side, at the time of full hot, the mix doors 15a and 15b first close the upper cold air passage Bu and the lower cold air passage Bl. When these are gradually opened and the temperature is adjusted, the full cool side, that is, the mix doors 15a and 15b are fully opened, and at the same time, only the second mix door 15b is switched from fully open to fully closed. The problem of having to do this will arise.
[0015]
The present invention has been made to solve the above-described problems of the prior art, and is a simple, low-cost and small-sized automobile capable of improving the performance during cooling while ensuring the air mixing property during temperature adjustment. An object of the present invention is to provide an air conditioning apparatus for use.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that a hot air passage for flowing the cold air flowing through the case through the heater core and a first cold air for flowing the cold air upward in the case bypassing the heater core. A passage, a second cool air passage that bypasses the heater core and flows downward in the case, a warm air passage, an upstream inlet of the second cool air passage, and the first cold air passage are adjusted in opening degree. 1 mix door and a second mix door for adjusting the opening degree of the second cold air passage The first mix door is provided so as to be rotatable with respect to a central axis disposed on the downstream side of the front surface of the heater core, and the second cold air passage is provided between the central axis and the heater core. The second mix door is attached to the central shaft and rotated in the cold air duct, thereby extending the first mix door along the downstream surface of the heater core. 2 Adjust the opening of the cold air passage, and the first mix door adjusts the opening of the inlet of the cold air duct This is an automotive air conditioner.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0019]
(Embodiment 1)
FIG. 1 is a cross-sectional view of an automotive air conditioner according to Embodiment 1 of the present invention. In addition, the same code | symbol is attached | subjected to the member which is common in the member shown in FIG. 16, FIG.
[0020]
The vertically-installed automotive air conditioner according to Embodiment 1 shown in FIG. 1 has a case C in which the cooler unit 1 and the heater unit 2 are integrated, and the size in the longitudinal direction of the vehicle is shortened. An evaporator 3 is provided in the upstream air passage, and a heater core 4 is provided in the downstream air passage.
[0021]
Air introduced from the vehicle width direction (perpendicular to the plane of FIG. 1) through the introduction port O is bent in the front-rear direction of the vehicle in the case C and cooled through the evaporator 3. Yes. The intake unit that takes in air is arranged on the side surface of the case C, and the length of the device in the vehicle front-rear direction is shortened.
[0022]
And in the case C, the warm air path H which heats and flows the cool air cooled through the evaporator 3 through the heater core 4, and the first cold air path which flows the cool air upward in the case C bypassing the heater core 4 B1 and a second cool air passage B2 that flows the cool air downward in the case C while bypassing the heater core 4 are formed.
[0023]
In the present embodiment, a bendable first mix door 5 that adjusts the opening degree of the upstream inlet 8 of the hot air passage H and the second cold air passage B2 and the first cold air passage B1 is provided. Moreover, the 2nd mix door 6 which adjusts opening degree of 2nd cold wind path | route B2 is provided rotatably.
[0024]
The air flow flowing down from the upstream air passage is selectively sent to the first cold air passage B1 and the upstream inlet 8 by the operation of the mix door 5 provided between the evaporator 3 and the heater core 4. Or at a predetermined ratio. In addition, by disposing the second mix door 6 downstream of the upstream side inlet 8, air flowing through the upstream side inlet 8 to the second cold air passage B2 can be blocked.
[0025]
As shown in FIG. 2, the first mix door 5 includes a first door portion 11 provided so as to be rotatable with respect to the central shaft 10, and the first door portion 11 on the side opposite to the central shaft 10. It has the 2nd door part 12 provided with the hinge part 13 so that rotation with respect to the 1 door part 11 is possible. Thereby, the 1st mix door 5 can be bent and extended in the part of the hinge part 13. FIG. Further, on both sides of the second door portion 12, an engagement pin 14 that moves along a guide groove 15 provided in the case C is provided. Accordingly, when the first door portion 11 is rotated by rotating the central shaft 10 by an actuator (not shown), the second door portion 12 moves accordingly. At this time, the second door portion 12 is engaged. Since the mating pin 14 is moved along the guide groove 15, the mixed door 5 can be kept in a desired bent form and a constant track as a whole.
[0026]
Although it is desirable to provide the pin 14 in the front end side of the 2nd door part 12 from a viewpoint of making a motion of a door smooth, it is not limited to this. Instead of the guide groove 15, for example, a guide rail may be used. In this case, an engagement groove may be formed instead of the engagement pin 14. Moreover, although the hinge part 13 is comprised, for example from the engaging hole part provided in a row by the end part of the 1st door part 11, and the engaging shaft part provided in a line by the end part of the 2nd door part 12, ( Neither of them may be formed), and may be formed of a thin resin such as polypropylene.
[0027]
As shown in FIG. 1, the central shaft 10 of the first mix door 5 is disposed on the downstream side and above the front surface of the heater core 4, and the second door portion 12 is configured to open and close the front surface of the heater core 4. ing. Thereby, the evaporator 3 and the heater core 4 can be provided closer to each other on the upstream side and the downstream side of the first mix door 5, and the unit can be made more compact.
[0028]
The second door portion 12 of the first mix door 5 is not limited to the flat plate as shown in the figure, and may be formed to have an arc shape that bulges downstream with a predetermined radius of curvature. Good. In this way, the flow direction of the air cooled through the evaporator 3 so as to smoothly face the direction of the first cold air passage B1 or the upstream side inlet 8 along the arcuate surface of the second door portion. Can be changed.
[0029]
The upper part of the case C has a vent outlet Fv and a differential outlet Fd, and a lower part has a foot outlet Ff. Each of the outlets F (the vent outlet Fv, the differential outlet Ff) Each mode door D (generic name for the vent door Dv, the differential door Dd, and the foot door Df) that opens and closes Fd and the foot outlet Ff) is provided to be rotatable in the direction of the arrow shown in the drawing. Moreover, the mix zone 7 which mixes the warm air heated by the heater core 4 and the cold wind which bypassed the heater core 4 is formed, and the mixed air is various blower outlets according to various wind distribution modes. The air is distributed from F to the passenger compartment, or is blown out without being mixed or cold air or hot air.
[0030]
Next, the operation of the first embodiment will be described.
FIG. 3 is a cross-sectional view for explaining the position of the mix door and the flow of air during a full cool.
[0031]
In the vent mode, the first mix door 5 is in a state in which the first door portion 11 and the second door portion 12 are least bent as shown in FIG. The second door portion 12 is set at the lower end position. The vent mode is a mode for cooling the passenger compartment, and the vent door Dv is set to “open”, the foot door Df is set to “closed”, and the differential door Dd is set to “closed”.
[0032]
Thus, at the time of a full cool, the upstream inlet 8 of the warm air passage H and the second cold air passage B2 is closed by the second door portion 12 of the first mix door 5, and the first cold air passage B1 is opened. State.
[0033]
Therefore, the air flow cooled by the evaporator 3 remains cold and flows through the first cold air passage B1 in the direction of the arrow in the figure, and then passes from the vent outlet Fv through the vent duct (not shown) to the vehicle interior. The wind is distributed toward. Further, the flow path through which air passes from the first cold air passage B1 toward the vent outlet Fv is short, and the ventilation resistance is reduced. Thereby, a high air volume can be ensured, and a large amount of cold air is guided into the vehicle interior.
[0034]
Here, since the upstream side inlet 8 of the second cold air passage B2 is closed, the cold air does not flow into the second cold air passage B2 regardless of the opening degree of the second mix door 6. Therefore, it is possible to prevent a temperature rise due to the cold air passing from the second cold air passage B2 near the surface of the heater core and being sent to the vent outlet Fv, and the cooling performance can be improved.
[0035]
Further, since the upstream inlet 8 of the second cold air passage B2 is opened and closed by the first mix door 5, the opening of the second mix door 6 is changed when the temperature adjustment is changed from the full hot side to the full cool side. Can be simply changed from “closed” to “open”, so that the control and machine configuration are not complicated, and a small and simple configuration can be achieved, resulting in low cost.
[0036]
Furthermore, since it is possible to easily form the vertical wall 9 having a predetermined height from the lower surface of the evaporator 3, it is possible to prevent the condensed water from flying from the evaporator 3.
[0037]
FIG. 4 is a cross-sectional view for explaining the position of the mix door and the flow of air during temperature control.
[0038]
At the time of temperature control, as shown in FIG. 4, the first mix door 5 is in an intermediate state in which the first door portion 11 and the second door portion 12 are bent, and the second door portion 12 is in the middle in the vertical direction. Set to position. The second mix door 6 is also set to an intermediate opening.
[0039]
Therefore, a part of the air flow cooled by the evaporator 3 flows from the upstream inlet 8 through the lower part of the first mix door 5 in the direction of the arrow in the figure, and is heated by the heater core 4 through the hot air passage H. The hot air reaches the mix zone 7 and passes through the second cold air passage B2 to reach the mix zone 7 with the cold air. Further, the remaining airflow remains cold and flows through the upper portion of the first mix door 5 in the direction of the arrow in the figure, and reaches the mix zone 7 from the first cold air passage B1.
[0040]
The hot air that has passed through the hot air passage H, the cold air that has passed through the first cold air passage B1, and the cold air that has passed through the second cold air passage B2 collide and mix in the mix zone 7, and are adjusted to a predetermined temperature. Thus, by mixing the three-layer air flow in the mix zone 7, the cold air and the hot air are sufficiently mixed, and the air mixing property of both is improved. Therefore, the temperature difference between the upper and lower sides in the case C is reduced to have a desired temperature characteristic, and a comfortable temperature control state without a sense of incongruity is achieved.
[0041]
FIG. 5 is a cross-sectional view for explaining the position of the mix door and the flow of air during full hot.
[0042]
In the foot mode, the first mix door 5 has a first door portion 11 and a second door portion 12 as shown in FIG. 5 when the cold air from the evaporator 3 is heated by the heater core 4 and blown into the passenger compartment. The second door portion 12 is set at the upper end position. The foot mode is a mode for heating the vehicle interior. At this time, the vent door Dv is set to “closed”, the foot door Df is set to “open”, and the differential door Dd is set to “closed”.
[0043]
In this way, at the time of full hot, the first cold air passage B1 is closed by the first door portion 11 of the first mix door 5 and the second cold air passage B2 is closed by the second mix door 6. Then, the warm air passage H is opened.
[0044]
Accordingly, the air flow cooled by the evaporator 3 is heated by the heater core 4 through the warm air passage H in the direction of the arrow in the figure to become warm air, and this warm air flows into the foot outlet Ff. The wind is distributed toward the feet of the occupant from (not shown). Moreover, the flow path through which air passes toward the foot outlet Ff is short, and a high air volume can be secured.
[0045]
In this way, the first mix door 5 can be operated by bending or extending the first door portion 11 and the second door portion 12 in a desired form. Can be reduced. As a result, the unit can be made more compact.
[0046]
(Embodiment 2)
FIG. 6 is a cross-sectional view of an automotive air conditioner according to Embodiment 2 of the present invention. In this embodiment, the first mix door 5 is different from the first embodiment in that the first mix door 5 is constituted by a single plate-like door that is rotatably provided on the central shaft 10. However, the other points are the same as those of the first embodiment, and the members common to the members shown in FIG. Also according to this embodiment, it becomes possible to prevent the temperature rise due to the cold air passing through the second cold air passage B2 near the surface of the heater core and being sent to the vent outlet Fv, and the cooling performance can be improved. .
[0047]
(Embodiment 3)
FIG. 7 is a cross-sectional view of an automotive air conditioner according to Embodiment 3 of the present invention. This embodiment is different from the first embodiment in that the first mix door 5 is constituted by a plate-like door that slides and controls the air flow of hot air and cold air. However, the other points are the same as those of the first embodiment, and the members common to the members shown in FIG.
[0048]
The first mix door 5 of this embodiment has an arc shape that extends in a direction that blocks the air flow from the upstream air passage between the evaporator 3 and the heater core 4 and bulges downstream with a predetermined radius of curvature. Presents. As shown in the figure, the first mix door 5 has a vertical direction that is approximately half of the opening of the upstream and downstream air passages, and a width direction provided from one side of the case C to the other side. It is a thing. The slide drive mechanism for operating the first mix door 5 is configured to drive a pair of gears G meshing with teeth formed near both side ends of the first mix door 5 with a motor or the like. Note that the slide drive mechanism is not limited to this, and may be a manual operation mechanism connected to the controller via a wire cable in some cases.
[0049]
According to this embodiment, the evaporator 3 and the heater core 4 are brought close to each other for compactness, and the cold air passes from the second cold air passage B2 near the surface of the heater core and is sent to the vent outlet Fv. It becomes possible to prevent temperature rise.
[0050]
(Embodiment 4)
8 is a cross-sectional view of a main part of an automotive air conditioner according to Embodiment 4 of the present invention, FIG. 9 is a perspective view of a mix door, and FIG. 10 is a perspective view of a cold air duct. Similar to the first embodiment, the first mix door 5 is provided with a first door portion 11 provided so as to be rotatable with respect to the central shaft 10 disposed on the downstream side and above the front surface of the heater core 4. The second door portion 12 is provided so as to be rotatable with respect to the door portion 11 and adjusts the opening degree of the front surface of the heater core 4. In addition, the cross section shown with the black spot around the mix door in the figure represents the seal member.
[0051]
In this embodiment, the second cold air passage B <b> 2 is formed by a cold air duct 16 extending from the center axis 10 and the heater core 4 along the downstream surface of the heater core 4 downward in the case C. In FIG. 10, the rear surface (right front side in the drawing) is drawn open, but the wall surface of the case C is located in this portion. An expanded portion 16a is formed in the lower portion of the cold air duct 16, so that the cold air can be widely guided downward in the case C. As shown in FIG. 11, the vertical wall 16b on the heater core 4 side may be formed with a chevron or a circular arc surface so that the heater core 4 is convex. If it does in this way, the warm air which passed heater core 4 can be divided into right and left smoothly.
[0052]
Moreover, the 2nd mix door 6 is attached to the center axis | shaft 10, is rotated in the cold wind duct 16, and adjusts the opening degree of 2nd cold wind channel | path B2. That is, both the first mix door 5 and the second mix door 6 are integrally attached to the central shaft 10 to form a butterfly-structured mix door Dm.
[0053]
The opening degree of the inlet 8 a of the cold air duct 16 is adjusted by the first door portion 11 of the first mix door 5. In addition, an inlet 8b is formed on the front surface of the heater core 4, and these inlets 8a and 8b constitute the upstream inlet 8 of the hot air passage H and the second cold air passage B2. The other points are the same as those of the first embodiment, and the members common to the members shown in FIG.
[0054]
Next, the operation of the fourth embodiment will be described.
FIG. 12 is a cross-sectional view for explaining the position of the mix door and the flow of air during a full cool.
[0055]
In the vent mode, when the cool air is blown out into the passenger compartment without heating all the cold air, the mix door 5 is in a state in which the first door portion 11 and the second door portion 12 are least bent as shown in FIG. The second door portion 12 is set at the lower end position. That is, at the time of full cool, the inlet 8b of the hot air passage H is closed by the second door portion 12 of the first mix door 5, and at the same time, the inlet 8a of the second cold air passage B2 is closed to the first mix door 5. The first door portion 11 is closed, and the first cold air passage B1 is opened. Therefore, the air flow cooled by the evaporator 3 is sent to the vent outlet Fv through the first cold air passage B1 in the direction of the arrow in the figure as the cold air.
[0056]
Also in this embodiment, at the time of a full cool, the inlet 8a of the second cold air passage B2 is closed, so the second mix door 6 is opened, but the cold air passes from the second cold air passage B2 near the surface of the heater core. Thus, it is not sent to the vent outlet Fv.
[0057]
FIG. 13 is a cross-sectional view for explaining the mix door position and the air flow during temperature control.
[0058]
At the time of temperature control, as shown in FIG. 13, the first mix door 5 is in an intermediate state in which the first door portion 11 and the second door portion 12 are bent, and the second door portion 12 is in the middle in the vertical direction. At the same time as being set to the position, the second mix door 6 is also set to an intermediate opening degree with respect to the second cold air passage B2.
[0059]
Therefore, a part of the air flow cooled by the evaporator 3 flows in from the inlet 8b through the lower part of the first mix door 5 in the direction of the arrow in the figure, is heated by the heater core 4 through the hot air passage H, and is warm air. And reaches the mix zone 7 and flows from the inlet 8a through the lateral gap between the first door portion 11 and the second door portion 12 of the first mix door 5, and passes through the second cold air passage B2. Pass through to the mix zone 7 with cold air. Further, the remaining airflow remains cold and flows through the upper portion of the first mix door 5 in the direction of the arrow in the figure, and reaches the mix zone 7 from the first cold air passage B1.
[0060]
The hot air passing through the hot air passage H, the cold air passing through the first cold air passage B1, and the cold air passing through the second cold air passage B2 form an air flow as shown by the dashed-dotted arrows in FIG. In zone 7, it collides and is mixed and adjusted to a predetermined temperature. Therefore, also in this embodiment, when the three-layer air flow of the warm air and the cool air is mixed in the mix zone 7, the cool air and the warm air are sufficiently mixed, and both air mix properties are improved.
[0061]
FIG. 15 is a cross-sectional view for explaining the position of the mix door and the flow of air during full hot.
[0062]
In the foot mode, when the cool air from the evaporator 3 is fully heated by the heater core 4 and blown out into the passenger compartment, the first mix door 5 has the first door portion 11 and the second door portion 12 as shown in FIG. The second door portion 12 is set at the upper end position. That is, at the time of full hot, the first cold air passage B1 is closed by the first door portion 11 of the first mix door 5, and the second cold air passage B2 is closed by the second mix door 6. On the other hand, the warm air passage H is opened.
[0063]
Therefore, the air flow cooled by the evaporator 3 is heated by the heater core 4 in the direction of the arrow in the drawing through the warm air passage H to become warm air, and this warm air flows into the foot outlet Ff.
[0064]
Thus, according to the present embodiment, in addition to being able to obtain the same effects as those of the first embodiment, the first mix door 5 and the second mix door 6 are integrally formed in the butterfly structure. Since parts such as links and levers that link the two are not required, the number of parts can be reduced and the cost can be further reduced. Further, since it is not necessary to provide a cold air passage under the heater core 4, further miniaturization can be realized. Furthermore, assembly work is facilitated, and the number of work steps can be reduced.
[0065]
The embodiments described above are not described for limiting the present invention, and various modifications can be made by those skilled in the art within the technical idea of the present invention.
[0066]
For example, in Embodiment 4 mentioned above, the 1st mix door 5 is provided so that rotation with respect to the 1st door part 11 and the 1st door part 11 provided rotatably with respect to the center axis | shaft 10 is possible. Although it has a foldable structure having the second door portion 12, the present invention is not limited to this, and may be configured by a single plate-like door that is rotatably provided on the central shaft 10. Is possible.
[0067]
【The invention's effect】
As described above, according to the first aspect of the present invention, the temperature rise due to the passage of the cold air from the second cold air passage through the vicinity of the surface of the heater core during the full cool while ensuring the air mixing at the time of temperature adjustment. Can be prevented, and the performance during cooling can be improved. Moreover, since the upstream inlet of the second cold air passage is opened and closed by the first mix door, a small and simple configuration can be achieved, and the cost can be reduced. Furthermore, since it becomes possible to easily form a vertical wall having a predetermined height upward from the lower surface of the evaporator, it is possible to prevent flying of condensed water.
[0068]
Also, above In addition to the above effect, since both the first mix door and the second mix door are attached to the central shaft, a mechanism for interlocking the both is unnecessary, the number of parts can be reduced, and the cost can be further reduced. further Since there is no need to provide a passage under the heater core, further downsizing can be realized. , Assembly work is also facilitated, and the number of work steps can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an automotive air conditioner according to Embodiment 1 of the present invention.
FIG. 2 is a perspective view of a first mix door of the apparatus.
FIG. 3 is a cross-sectional view for explaining the position of the mix door and the flow of air during a full cool.
FIG. 4 is a cross-sectional view for explaining the position of the mix door and the flow of air during temperature control.
FIG. 5 is a cross-sectional view for explaining the position of the mix door and the air flow during full hot.
FIG. 6 is a cross-sectional view of an automotive air conditioner according to Embodiment 2 of the present invention.
FIG. 7 is a cross-sectional view of an automotive air conditioner according to Embodiment 3 of the present invention.
FIG. 8 is a cross-sectional view of a main part of an automotive air conditioner according to Embodiment 4 of the present invention.
FIG. 9 is a perspective view of a mix door of the apparatus.
FIG. 10 is a perspective view of a cold air duct of the same device.
FIG. 11 is a perspective view showing a modified example of the cold air duct.
FIG. 12 is a cross-sectional view for explaining the position of the mix door and the flow of air during a full cool.
FIG. 13 is a cross-sectional view for explaining the position of the mix door and the flow of air during temperature control.
FIG. 14 is a perspective view schematically showing the air flow during temperature control.
FIG. 15 is a cross-sectional view for explaining the position of the mix door and the flow of air during full hot.
FIG. 16 is a schematic cross-sectional view showing a conventional automobile air conditioner.
FIG. 17 is a schematic sectional view showing a conventional automobile air conditioner.
[Explanation of symbols]
3 ... Evaporator,
4 ... Heater core,
5 ... 1st mix door,
6 ... Second mix door,
7 ... mix zone,
8 ... Upstream side entrance
8a, 8b ... inlet (upstream side inlet),
10 ... central axis,
16 ... Cold air duct,
B1 ... first cold air passage,
B2 ... second cold air passage,
H ... Warm air passage,
C: Case.

Claims (1)

A hot air passage (H) for flowing the cold air flowing in the case (C) through the heater core (4) and flowing;
A first cold air passage (B1) that flows the cold air upward in the case (C), bypassing the heater core (4);
A second cold air passage (B2) for flowing the cold air downward in the case (C), bypassing the heater core (4);
A first mix door (5) for adjusting the opening of the hot air passage (H) and the upstream inlet (8) of the second cold air passage (B2) and the first cold air passage (B1);
A second mix door (6) for adjusting the opening of the second cold air passage (B2);
I have a,
The first mix door (5) is provided so as to be rotatable with respect to a central axis (10) disposed on the downstream side and above the front surface of the heater core (4).
The second cold air passage (B2) has a cold air duct extending from the space between the central shaft (10) and the heater core (4) to the lower side in the case (C) along the downstream surface of the heater core (4). 16),
The second mix door (6) is attached to the central shaft (10) and rotated in the cold air duct (16) to adjust the opening of the second cold air passage (B2),
The first air mixing device (5) adjusts the opening of the inlet (8a) of the cold air duct (16) .

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