JP2008013016A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress changes of the temperature of air blowing into a vehicular cabin through a foot blow-off port. <P>SOLUTION: In an air conditioning unit 10, separating opening portions 27a, 27b, 27c are dispersed into position of different air temperature states in a mixing portion 6. When cover portions 28a, 28b, 28c are rotated in a clockwise direction, the cover portions 28a, 28b, 28c uniformly block the separating opening portions 27a, 27b, 27c, so that the separating opening portions 27a, 27b, 27c come to have uniform opening rate. Air in the different temperature states uniformly flows, therefore, into the separating opening portions 27a, 27b, 27c. Even if the opening rate of the separating opening portions 27a, 27b, 27c changes, it is thereby suppressed that the temperature of the air blowing out from the separating opening portions 27a, 27b, 27c into the vehicular cabin through the foot blow-off port. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner that adjusts an air temperature using a cooling heat exchanger and a heating heat exchanger.

  2. Description of the Related Art Conventionally, in an indoor air conditioning unit of a vehicle air conditioner, a first opening is provided in a wall portion of an air conditioning casing, and a disk rotary door that is rotatably supported with respect to the air conditioning casing is provided. There has been proposed one that opens and closes an opening by rotating (see, for example, Patent Document 1).

  In this case, since the disk rotary door rotates over 360 ° C., other members cannot be arranged in the rotation trajectory of the disk rotary door, leading to an increase in the size of the indoor air conditioning unit. However, in recent years, there has been a strong demand for a reduction in vehicle mounting space of the indoor air conditioning unit, and it has become difficult to adopt a disk rotary door.

  On the other hand, there is one in which a fan-shaped door is used and the rotation locus of the fan-shaped door is set to a fan shape with an angle of less than 180 degrees to reduce the size of the indoor air conditioning unit. An example of an indoor air conditioning unit using a fan-shaped door as a foot door will be described with reference to FIG.

  In the air conditioning casing 1 of the indoor air conditioning unit, the heater unit 3 is disposed at a position spaced apart from the evaporator 2 by a predetermined distance. Bypassing the heater unit 3 between the heater unit 3 and the evaporator 2, cool air is directed upward. A cold air bypass passage 4 through which air is passed is provided. In the air conditioning casing 1, the hot air passage 5 through which the hot air from the heater unit 3 flows upward, and the hot air from the hot air passage and the cold air from the cold air bypass passage 4 merge. A portion 6 is provided.

  The air conditioning casing 1 is provided with a differential opening 7a, a face opening 7b, and a foot opening 7c. The differential opening 7a is provided at a position overlapping the mixing unit 6 in the wall 1a, and the face opening 7b and the foot opening 7c are provided on the downstream side of the mixing unit. And the mode doors 8a, 8b, and 8c which are supported rotatably with respect to the air-conditioning casing 1 and open and close the openings 7a, 7b and 7c, respectively, are provided.

  Here, a slide door is provided as the mode door 8c for opening and closing the foot opening 7c. The sliding door 8c includes a rotating shaft 8d that is rotatably supported with respect to the air conditioning casing 1, and a fan-shaped cover portion 8e that slides with the rotation of the rotating shaft 8d to open and close the foot opening 7c. Yes.

In the indoor air-conditioning unit configured as described above, the mode doors 8a, 8b, and 8c are used to selectively open and close the differential opening 7a, the face opening 7b, and the foot opening 7c, so that the face mode and the foot mode Various blowing modes such as a differential mode and a foot-def mode are performed.
JP 2003-39930 A

  In the indoor air conditioning unit using the slide door 8 described above, the opening area of the differential opening 7a and the opening area of the foot opening 7c may not be the same due to a vehicle mounting space or the like.

  For this reason, when it is necessary to set the ratio of the blown air amount of the differential opening 7a and the blown air amount of the foot opening 7c to a predetermined ratio (for example, 1: 1) when the foot-diff mode is performed. Needs to have different values for the opening ratio of the differential opening 7a and the opening ratio of the foot opening 7c.

  For example, when the opening area of the differential opening 7a and the opening area of the foot opening 7c are in a ratio of 1: 2, the ratio of the blown air amount of the differential opening 7a and the blown air amount of the foot opening 7c. Is set to 1: 1, it is necessary to make the differential opening 7a fully open and the foot opening 7c half open.

  Here, since the foot opening 7c is provided at a position overlapping the mixing unit 6 as described above, a temperature gradient of the air temperature is also formed in the foot opening 7c as shown in FIG. Will be. That is, the temperature characteristic gradually decreases from 70 ° C. in the direction in which the warm air flows.

  Therefore, when the foot opening 7c is fully opened when the foot mode is performed, air in a temperature range from 30 ° C. to 50 ° C. flows into the foot opening 7c, but the foot-diff mode is performed. In this case, the foot opening 7c is in a half-open state, so that only air near 30 ° C. flows into the foot opening 7c, and 50 ° C. air flows toward the differential opening 7a. Therefore, when the opening ratio of the foot opening 7c changes, the temperature of the air blown out from the foot opening 7c through the foot outlet into the vehicle interior changes.

  An object of this invention is to provide the air conditioner which suppressed that the blowing air temperature of an opening part changes with the change of the aperture ratio of an opening part in view of the said point.

  In order to achieve the above object, in the present invention, the first opening is configured to have a plurality of separation openings that are separately formed to open, and the first door is connected to the air conditioning casing. And a plurality of cover portions that are slidably moved by rotation of the rotation shaft and equally close the plurality of separation openings. .

  Accordingly, the opening ratios of the plurality of separation openings can be made uniform by the plurality of cover portions. Therefore, if the plurality of separation openings are provided at different air temperature positions, the plurality of separation openings. Air in different temperature states flows uniformly into the sections. Therefore, it can suppress that the blowing air temperature of an opening part changes with the change of the aperture ratio of an opening part.

  In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the air conditioning unit 10 portion in the present embodiment, and FIG. 2 is a front view of the air conditioning unit 10 portion as viewed from the passenger compartment side.

  The ventilation system (indoor unit part) of the vehicle air conditioner according to the present embodiment is roughly divided into two parts: an air conditioning unit 10 and a blower unit (not shown). The blower unit is arranged offset from the central part to the passenger seat side in the lower part of the instrument panel in the passenger compartment. On the other hand, the air conditioning unit 10 has a vehicle width (left and right) in the instrument panel inside the passenger compartment. It is arranged at the approximate center of the direction.

  As is well known, the blower unit is an internal / external air switching box for switching between the inside air (vehicle interior air) and the outside air (vehicle interior air), and a blower (specifically, a centrifugal type) that sucks air through the inside / outside air switching box and blows air. Electric blower).

  The air conditioning unit 10 is of a type in which both the evaporator 12 and the heater core 13 are integrally incorporated in one common air conditioning casing 11. The air conditioning casing 11 is made of a resin molded product having a certain degree of elasticity and excellent strength, such as polypropylene. Specifically, the air conditioning casing 11 includes a plurality of divided cases, and the plurality of divided cases are integrally coupled by fastening means such as metal spring clips and screws.

  The air conditioning unit 10 part is arranged in the form shown in FIGS. 1 and 2 with respect to the front and rear, the top and bottom, and the left and right direction of the vehicle at a substantially central part in the vehicle width direction inside the instrument panel. An air inlet 14 is formed on the side surface (side surface on the passenger seat side) of the air-conditioning casing 11 that is the frontmost part of the vehicle. Air-conditioned air blown from the blower unit described above flows into the air inlet 14.

  An evaporator 12 is disposed immediately after the air inlet 14 in the air conditioning casing 11, and the entire amount of blown air from the air inlet 14 flows into the front surface of the evaporator 12. As is well known, the evaporator 12 is a heat exchanger for cooling that absorbs the latent heat of evaporation of the refrigerant in the refrigeration cycle from the blown air and cools the blown air.

  And the heater core 13 is arrange | positioned at predetermined intervals in the air flow downstream (vehicle rear side) of the evaporator 12. The heater core 13 heats the cold air that has passed through the evaporator 12, and hot water (engine cooling water) flows through the heater core 13 and heats the air using the hot water as a heat source. It is.

  In the air passage in the air conditioning casing 11, a cold air bypass passage 15 is formed in an upper portion of the heater core 13 so that air (cold air) flows by bypassing the heater core 13. A flat air mix door 16 is disposed between the heater core 13 and the evaporator 12. The air mix door 16 is rotatable in the vehicle vertical direction around the rotation shaft 17.

  The air mix door 16 adjusts the air volume ratio between the warm air heated by the heater core 13 and the cold air that bypasses the heater core 13 through the cold air bypass passage 15, and the temperature of air blown into the vehicle interior by adjusting the air volume ratio Adjust. The air mix door 16 serves as a temperature adjusting means for the air blown into the passenger compartment.

  One end of the rotating shaft 17 protrudes outside the air conditioning casing 11 and is connected to a temperature adjustment operation mechanism via a link mechanism (not shown). The temperature adjustment operation mechanism is configured by an actuator mechanism using a servo motor or the like or a manual operation mechanism, and adjusts the rotational position of the air mix door 16.

  In the air conditioning casing 11, a hot air passage 18 is formed on the downstream side of the heater core 13 (on the vehicle rear side) from the immediately after the heater core 13 upward. The downstream side (upper side) of the hot air passage 18 merges with the downstream side of the cold air bypass passage 15 at the upper portion of the heater core 13 to form an air mixing portion 19 that mixes the cold air and the hot air.

  On the other hand, the face openings 20 and 21 are opened at a portion immediately above the air mixing portion 19 in the upper surface wall portion 11a of the air conditioning casing 11, in other words, at a portion of the air conditioning casing 11 on the vehicle rear side of the upper surface wall portion 11a. Yes. The face openings 20 and 21 are located on the downstream side of the air mixing unit 19, and conditioned air whose temperature is controlled from the air mixing unit 19 flows into the face openings 20 and 21. As shown in FIG. 2, the face openings 20 and 21 are divided into four in the vehicle width direction.

  The two face openings located at the center in the vehicle width (left and right) direction are the center face openings 20, and the side face openings 21 are arranged on both the left and right sides of the center face openings 20. The center face opening 20 is connected to a center face air outlet disposed above the central portion in the instrument panel width direction via a center face duct (not shown), and conditioned air (cold air) is supplied from the center face air outlet. Is blown out toward the upper body of the passenger at the center in the width direction of the passenger compartment.

  The side face opening 21 is connected to side face air outlets disposed on the left and right sides in the instrument panel width direction via a side face duct (not shown). Warm air) is blown out toward the occupant's upper body side or side window glass at the left and right sides in the vehicle interior width direction.

  In the air conditioning casing 11, a face door 22 is disposed below the face openings 20 and 21 to open and close the face openings 20 and 21. The face door 22 is an elongated rectangular plate-like door extending in the vehicle width direction as shown in FIG. 2, and is connected to a rotary shaft 23 disposed at the vehicle rear side end portion of the upper surface wall portion 11 a of the air conditioning casing 11. The rotary shaft 23 can be rotated.

  In addition, a defroster opening 24 is opened at a position on the front side of the vehicle from the face openings 20 and 21 in the upper surface wall 11 a of the air conditioning casing 11. The defroster opening 24 is disposed on the downstream side of the air mixing unit 19 and is supplied with temperature-controlled conditioned air from the air mixing unit 19 and is connected to a defroster outlet through a defroster duct (not shown). From the defroster outlet, conditioned air is blown out toward the inner surface of the vehicle front window glass.

  In the air conditioning casing 11, a defroster door 25 is disposed below the defroster opening 24 to open and close the defroster opening 24. The defroster door 25 is an elongated rectangular plate-like door that extends in the vehicle width direction, similar to the face door 22, and the defroster door 25 is a rotating shaft disposed on the vehicle front side of the defroster opening 24 inside the air conditioning casing 11. 26, and is rotatable about the rotation shaft 26.

  Further, in the air conditioning casing 11, foot opening portions 27 (solid lines in FIG. 1) are opened in the side wall portions 11b (see FIG. 2) on both the left and right sides in the vehicle width direction. As shown in FIG. 1, the foot opening 27 is arranged at a portion overlapping with the region of the air mixing portion 19 located above the heater core 13.

  The foot opening 27 includes three separation openings 27a, 27b, and 27c that extend in a radial direction from a rotation shaft 29 of the foot door 28, which will be described later, and are formed separately from each other. The separation openings 27a, 27b, and 27c are each formed in a fan shape having the same area with the rotation shaft 29 as the center. Here, the angle between the separation openings 27a and 27b and the angle between the separation openings 27b and 27c are the same angle.

  Further, as described above, the separation openings 27a, 27b, and 27c are disposed so as to overlap the mixing unit 6, and a temperature gradient is formed in the mixing unit 6 due to the cold air and the hot air. Become. Specifically, the temperature characteristic is such that the air temperature changes from about 70 ° C. to about 10 ° C. in the direction of warm air flow. The separation openings 27a, 27b, and 27c are dispersed in regions having different air temperature states.

  The foot opening 27 is disposed on the warm air passage 5 side in the air mixing unit 19. For this reason, high-temperature air flows into the foot opening 27 compared to the defroster door 25 on the downstream side of the mixing unit 19.

  In the present embodiment, the total sum S1 of the opening areas of the separation openings 27a, 27b, and 27c is set to, for example, twice the opening area S2 of the defroster opening 24 due to the vehicle mounting space. (S1 = 2 × S2).

  Further, a foot door 28 for opening and closing the foot opening 27 is rotatably provided. The foot door 28 is provided at a rotating shaft 29 extending in the vehicle width direction and rotatably supported by the air conditioning casing 11 at both ends of the rotating shaft 29 as shown by hatched portions in FIG. Cover portions 28a, 28b, and 28c. The cover portions 28a, 28b, and 28c are formed so as to extend from the rotary shaft 29 in a plate shape in the radial direction.

  Specifically, the cover portions 28a, 28b, and 28c are each formed in a fan shape having the same area, and the areas of the cover portions 28a, 28b, and 28c are wider than the areas of the separation openings 27a, 27b, and 27c. And it is narrower than the area between the separation openings 27a and 27b (27b and 27c).

  Here, the cover portions 28a, 28b, and 28c are arranged along the inner surfaces of the left and right side wall portions 11b of the air conditioning casing 11 in the vicinity of both ends of the rotating shaft 29, and along the inner surfaces of the left and right side wall portions 11b. By sliding, the separation openings 27a, 27b, and 27c are opened and closed uniformly.

  Here, the cover portions 28a, 28b, 28c and the rotating shaft 29 can be integrally formed of resin. The foot opening 27 opens from the left and right side wall portions 11b of the air-conditioning casing 11 in the vehicle width direction into the vehicle compartment, and blows air-conditioned air toward the feet of the passengers.

  A sealing material 30 is provided on each of the substantially fan-shaped peripheral edges of the cover portions 28a, 28b, and 28c. The sealing material 30 is made of an elastic material that exhibits a sealing function when the foot openings 27 (that is, the separation openings 27a, 27b, and 27c) are fully closed. Among the elastic materials, a thermoplastic elastomer is used. Composed. A thermoplastic elastomer exhibits rubber elasticity at room temperature, and melts and exhibits fluidity when heated at a high temperature, and can be injection-molded in the same manner as a thermoplastic resin.

  Here, the cover portions 28a, 28b, 28c and the rotary shaft 29 are rigid door portions, and a thermoplastic resin having high mechanical strength such as polypropylene and having a certain degree of elasticity is integrally formed by injection molding. . For example, the door rigid portion (28a, 28b, 28c, 29) of the foot door 28 and the sealing material 30 portion can be integrally molded by a two-color molding method (composite molding method). Here, as is well known in the two-color molding method (composite molding method), two types of molten resins of different materials are injected into a molding die, and the two types of resin moldings are joined together in the molding die. It is a method to do.

  In FIG. 1, an alternate long and short dash line 22 a indicates the rotation locus range of the face door 22. The cover portions 28a, 28b, and 28c rotate clockwise from the fully open position of the separation openings 27a, 27b, and 27c shown in FIG. 1 to the fully closed position where they overlap on the separation openings 27a, 27b, and 27c. Rotate.

  Accordingly, the doors 22 and 28 are arranged so that the rotation trajectory range 22a of the face door 22 and the rotation trajectory range of the foot door 28 partially overlap when viewed from the vehicle width direction (perpendicular to the door surface of the foot door 28). Has been.

  Therefore, in order to avoid interference between the doors 22 and 28, as shown in FIG. 2, the distance L2 between the two foot doors 28 on the left and right sides is larger by a predetermined amount than the length L1 of the face door 22 in the vehicle width direction. Then, the face door 22 is arranged inside the two foot doors 28 on both the left and right sides with a predetermined interval (for example, about 5 mm).

  As a result, even if the rotational trajectory ranges of the doors 22 and 28 partially wrap, the foot door 28 rotates along the inner surface of the side wall 11b of the case 11 at the left and right outer sides of the face door 22 in the vehicle width direction. This is possible, and interference between the doors 22 and 28 can be avoided.

  Next, the operation of this embodiment in the above configuration will be described. In the vehicle air conditioner of the present embodiment, the air mix door 16 adjusts the ratio between the amount of cold air in the cold air bypass passage 15 and the amount of hot air that flows into the heater core 13 and heats it, thereby adjusting the temperature of air blown into the vehicle interior. adjust. Further, by selecting the operation positions of the face door 22, the defroster door 25, and the foot door 28, various blowing modes can be switched and set.

  As this blowing mode, a face mode in which conditioned air is blown from the face openings 20 and 21, a bi-level mode in which conditioned air is blown from both the face openings 20 and 21 and the foot opening 27, and conditioned air is blown from the foot opening 27. A foot mode that blows mainly a small amount of conditioned air from the defroster opening 24, a defroster mode that blows conditioned air from the defroster opening 24, and a foot that blows conditioned air from the foot opening 27 and the defroster opening 24 The differential mode can be switched.

  The foot door 28 is rotated and operated along the surfaces of the left and right side wall portions 11 b of the case 11 and functions to open and close the foot opening portion 27. Hereinafter, the opening / closing action of the foot opening 27 by the foot door 28 will be specifically described.

  In the foot mode, the cover portions 28a, 28b, and 28c of the foot door 28 are disposed on the left sides of the separation openings 27a, 27b, and 27c, respectively, as shown in FIG. Then, the cover portion 28a is disposed between the separation openings 27a and 27b, and the cover portion 28b is disposed between the separation openings 27b and 27c. At this time, as shown in FIG. 3B, the separation openings 27a, 27b, and 27c are fully opened. FIG.3 (b) is AA sectional drawing in Fig.3 (a).

  Further, when the cover portions 28a, 28b, and 28c are rotated clockwise from the position shown in FIG. 3A, the aperture ratios of the separation openings 27a, 27b, and 27c can be changed uniformly. Here, the aperture ratio is defined as 100% when the separation openings (27a, 27b, 27c) are fully open, and 0% when the separation openings are fully closed, and the opening area of the separation openings. This is the ratio shown.

  For example, in the foot differential mode (or bi-level mode), the cover portions 28a, 28b, 28c are rotated clockwise from the position shown in FIG. 3A to the position shown in FIG. At this time, as shown in FIG. 4B, the cover portions 28a, 28b, and 28c are arranged so as to cover half the area of the separation openings 27a, 27b, and 27c, and the cover portions 28a, 28b, and 28c are separated. 27a, 27b, and 27c are uniformly half-opened. That is, the opening ratios of the separation openings 27a, 27b, and 27c are each 50%.

  In the present embodiment, the reason why the opening ratios of the separation openings 27a, 27b, and 27c are set to 50% is that the amount of air blown from the foot opening 27 and the amount of air blown from the defroster opening 24 in the foot-def mode are predetermined. This is to make the ratio (for example, 1: 1). In the foot-def mode, the aperture ratios of the separation openings 27a, 27b, and 27c are not limited to 50%, and may be set to other aperture ratios.

  In the face mode (or defroster mode), the cover portions 28a, 28b and 28c are rotated clockwise from the position shown in FIG. 4A to the position shown in FIG. At this time, as shown in FIG. 5B, the cover portions 28a, 28b, and 28c are arranged so as to cover all of the separation openings 27a, 27b, and 27c, and the cover portions 28a, 28b, and 28c are arranged in the separation opening portion 27a. , 27b and 27c are uniformly fully closed. That is, the opening ratios of the separation openings 27a, 27b, and 27c are each 0%.

  According to the present embodiment described above, the separation openings 27a, 27b, and 27c are dispersed at different air temperature states in the mixing unit 6. When the cover portions 28a, 28b, 28c are rotated clockwise, the cover portions 28a, 28b, 28c uniformly close the separation openings 27a, 27b, 27c, and the separation openings 27a, 27b, 27c are uniform. Of the aperture ratio (that is, the half-open state) For this reason, air in different temperature states flows equally into the separation openings 27a, 27b, and 27c. Therefore, even if the aperture ratios of the separation openings 27a, 27b, and 27c change, it is possible to suppress a change in the air temperature that blows out from the separation openings 27a, 27b, and 27c through the foot outlet into the vehicle interior.

  Here, the separation openings 27 a, 27 b, 27 c are arranged on the heater core 13 side as compared with the defroster opening 24. For this reason, when the separation openings 27a, 27b, and 27c are fully opened in the foot mode, the air temperature blown out from the foot opening 7c into the vehicle interior (see graph A in FIG. 6) and the defroster opening 24 blows out into the vehicle interior. A predetermined temperature difference (for example, 10 ° C.) can be secured between the air temperature (see graph B in FIG. 6).

  However, when the foot door is used as the fan-shaped slide door in the prior art of FIG. 8, when the foot opening 7c is set in the half-open state in the foot-def mode, the above-described “problem to be solved by the invention” is described. Thus, since only the air of low temperature (about 30 degreeC) flows in into the foot opening part 7c, the blowing temperature from the foot opening part 7c falls compared with the case of foot mode. For this reason, in the foot-def mode, the temperature difference between the blown air temperature from the foot opening 7c (graph C in FIG. 7) and the blown air temperature from the defroster opening 24 (graph D in FIG. 7) is reduced. For example, it becomes about 2 ° C. 6 and 7 and graphs A to D, the vertical axis represents the temperature of air blown from the defroster opening 24 into the vehicle interior, and the horizontal axis represents the opening of the air mix door.

  Therefore, conventionally, an air guide is provided in the air conditioning casing 11 or the air mix door 16, and the warm air is guided to the foot opening 7c to increase the temperature of the air flowing into the foot opening 7c in the foot-def mode, thereby the foot opening 7c. The temperature difference between the temperature of the air flowing into the air and the temperature of the air flowing into the defroster opening 24 is ensured.

  On the other hand, in the present embodiment, when the separation openings 27a, 27b, 27c are fully opened in the foot mode, and when the separation openings 27a, 27b, 27c are half-opened in the foot-diff mode. Thus, it is possible to suppress changes in the temperature of the air flowing into the separation openings 27a, 27b, and 27c. That is, even in the foot-diff mode and the foot mode, it is possible to suppress a change in the temperature of the air blown from the foot opening 7c without using an air guide.

In the above-described embodiment, the example in which the first door is applied to the foot door has been described. However, the present invention is not limited to this and may be applied to other doors.
In the above-described embodiment, an example in which the air conditioner of the present invention is applied to a vehicle air conditioner has been described. However, the present invention is not limited thereto, and the air conditioner of the present invention may be applied to an installation type air conditioner.

It is sectional drawing which shows the structure of the vehicle air conditioner concerning one Embodiment of this invention. It is the figure which looked at the vehicle air conditioner of FIG. 1 from the vehicle interior side. It is a figure for demonstrating the action | operation of the door of FIG. It is a figure for demonstrating the action | operation of the door of FIG. It is a figure for demonstrating the action | operation of the door of FIG. It is a figure for demonstrating the characteristic change of the blowing air temperature of a foot opening part. It is a figure for demonstrating the characteristic change of the blowing air temperature of a foot opening part. It is a figure which shows the structure of the conventional vehicle air conditioner.

Explanation of symbols

6 ... mixing unit, 10 ... air conditioning unit, 11 ... air conditioning casing,
16 ... Air mix door, 27a, 27b, 27c ... Separation opening,
28a, 28b, 28c ... cover part, 20, 21, 27 ... opening part.

Claims (8)

An air conditioning casing in which the first opening is provided in the wall;
A first door that is rotatably supported with respect to the air-conditioning casing and slides along the wall portion by rotation to open and close the first opening;
A blower that blows air toward the first opening;
A cooling heat exchanger that is disposed in the air conditioning casing and cools the air blown from the blower;
A heating heat exchanger that is disposed in the air conditioning casing and heats the cold air blown out of the cooling heat exchanger;
A bypass passage disposed in the air conditioning casing and bypassing the heating heat exchanger and passing the cold air from the cooling heat exchanger to the first opening side; and
A mixing unit that is disposed in the air conditioning casing and mixes the cold air from the bypass channel and the hot air from the heating heat exchanger;
The first opening is an air conditioner provided at a position where a temperature gradient is formed in the air temperature by the cold air and the hot air, overlapping the mixing portion.
The first opening is configured to have a plurality of separation openings that are formed to be separated from each other.
The first door includes a rotation shaft that is rotatably supported with respect to the air conditioning casing, and a plurality of cover portions that slide by the rotation of the rotation shaft and equally close the plurality of separation openings. The air conditioner characterized by comprising. The air conditioner according to claim 1, wherein the plurality of separation openings are provided at different air temperature positions. The plurality of cover portions are formed to extend in the radial direction from the rotation shaft,
The air conditioner according to claim 2, wherein the plurality of separation openings are formed so as to extend in a radial direction from a rotation axis of the first door. When the first opening is in a fully open state, at least one cover portion among the plurality of cover portions is disposed between two adjacent separation openings among the plurality of separation openings. The air conditioner according to any one of claims 1 to 3, wherein the air conditioner is provided. An air mix door that is rotatably supported on the upstream side of the heating heat exchanger and changes a ratio of an air amount flowing into the bypass flow path and an air amount flowing into the heating heat exchanger is provided. The air conditioner according to any one of claims 1 to 4. The bypass passage is formed so as to ventilate from between the cooling heat exchanger and the heating heat exchanger toward the upper side of the heating heat exchanger,
The air conditioning apparatus according to any one of claims 1 to 5, wherein the air mixing unit is provided on an upper side of the heating heat exchanger. The air conditioning casing includes a second opening disposed on the downstream side of the mixing unit,
The air conditioner according to any one of claims 1 to 6, further comprising a second door that is rotatably supported by the air conditioning casing and opens and closes the second opening. A vehicle air conditioner comprising the air conditioner according to claim 7,
The first opening is a foot opening that blows air toward the lower body of the occupant;
The vehicle air conditioner, wherein the second opening is a differential opening that blows air toward the inner wall surface of the vehicle window glass.

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