JP2005231511A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle having an air mix door, suppressing reduction of air flow property and improving air mixing characteristic. <P>SOLUTION: The air mix door (20) has a door body part (23) for adjusting an amount of air passing through a detour passage (15) and a heating air passage (16) by opening/closing both passages (15, 16); and an air mix guide (22) integrally arranged opposed to the door body part (23) and forming an auxiliary air passage (26) a gap with the door body part (23). The air mix guide (22) is operated in response to the opening/closing action of the door body part (23) and a position relationship of an entrance side and an exit side of the auxiliary air passage (26) is varied. When the door body part (23) is positioned at a position for closing the heating air passage (16), the air mix guide (22) is arranged in approximately parallel to an air flow direction in the detour passage (15). Thereby, the air mixing characteristic is improved and reduction of the air flow property can be suppressed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle air conditioner having an air mix door with improved air mixing characteristics, and is particularly effective for use in an air conditioner for a rear seat.

  A vehicle air conditioner consists of a blower that produces wind, an evaporator that produces cold air using a low-temperature refrigerant, and a heater core that produces hot water using hot water from an engine, etc., and a comfortable temperature for passengers is created by reheating the cold air. It is done. There are two types of temperature control methods: air mix method and reheat method, most of which employ air mix method, by mixing the low temperature air cooled by the evaporator and the high temperature air heated by the heater core at the air mix door. Control the temperature. The temperature-controlled air (air-conditioned air) is blown into the vehicle interior from the face blowout port, the foot blowout port, or the like in accordance with the air blowing mode (face mode, foot mode, bi-level mode, etc.).

  However, when a vehicle air conditioner is mounted on a vehicle, particularly when a rear seat air conditioner is mounted, downsizing is required due to restrictions on the mounting space. Particularly in the bi-level mode, since the internal space (mixing area) of the air conditioner is narrow, mixing by the air mix door becomes insufficient, and the temperature difference between the air blown from the face blowout port and the foot blowout port becomes too large.

  That is, the low temperature air cooled by the evaporator is mainly blown out from the face blowout port, and the high temperature air heated by the heater core is blown out mainly from the foot blowout port. This means that even in face mode and foot mode, air mixing doors are not sufficiently mixed, and the air blown out from the face outlet and foot outlet becomes laminar flow of hot air and cold air, respectively. Gives you discomfort.

  In order to improve the air mixing property, it is conceivable to use a plurality of doors or to form an auxiliary air passage in the case main body of the vehicle air conditioner. However, in the former case, since it is necessary to add a door and a link mechanism, the internal space of the vehicle air conditioner is narrowed, and on the contrary, its air flowability is lowered. In the latter case, since the auxiliary air passage is fixed, depending on the blowing mode, the air flow property is lowered. This becomes conspicuous at the time of the maximum cool when the blower blow volume is maximum (low-temperature air cooled by the evaporator is blown out from the face outlet).

  The present invention has been made in view of the above points, and provides an air conditioning apparatus for a vehicle that suppresses a decrease in air flowability in the vicinity of an air mix door and improves air mixing characteristics without increasing the number of parts. With the goal.

  In order to achieve the above object, the present invention employs the following technical means.

The vehicle air conditioner according to claim 1 includes an air conditioning case (11) that forms an air passage, a cooling heat exchanger (12) that is installed in the air conditioning case (11) and cools the air, and an air conditioner. A heating heat exchanger (13) that is provided in the case (11) and heats the air that has passed through the cooling heat exchanger (12), and cold air sent from the cooling heat exchanger (12) is heated. A bypass passage (15) that flows around the heat exchanger (13), a heating air passage (16) through which hot air sent from the heating heat exchanger (13) flows, and a cooling heat exchanger (12) ) And an air mix door (20) for adjusting the temperature of the air-conditioned air by adjusting the mixing ratio of the cooling air heat-exchanged by heating and the heating air heat-exchanged by the heating heat exchanger (13). Vehicle air conditioner,
The air mix door (20) opens and closes the bypass passage (15) and the heated air passage (16), and adjusts the amount of air passing through the passages (15, 16). An air mix guide (22) disposed at a position away from the main body (23), and a connecting portion (24) for integrally connecting the door main body (23) and the air mix guide (22); An auxiliary air passage (26) is formed between the door body (23) and the air mix guide (22),
One end side of the auxiliary air passage (26) through the auxiliary air passage (26) when the door body (23) is in the first position opening the bypass passage (15) and the heated air passage (16). Cold air is sent to the other end from the
When the door main body (23) is in the second position that opens the bypass passage (15) and the heated air passage (16), the other end of the auxiliary air passage (26) is provided via the auxiliary air passage (26). Hot air is sent to cold air from the side to one end side.

  In the present invention, the position of the air mix guide (22) can be changed in conjunction with the opening / closing position of the door body (23) with respect to both the passages (15, 16). Therefore, in addition to mixing by the main flow path of the air mix door (20), the air cooled by the cooling heat exchanger (12) is transferred by the heating heat exchanger (13) via the auxiliary air passage (26). It can be introduced into the heated air or, conversely, the heated air can be introduced into the cooled air. As a result, the mixing characteristics of the air mix door (20) can be improved.

  For example, the first position is a position where the door body (23) opens the bypass passage (15) larger than the heated air passage (16), and the second position is the position where the door body (23) is the bypass passage ( 15) is a position that opens the heated air passage (16) larger than 15). Therefore, in the first position, a large amount of air (cold air) flows on the bypass passage (15) side, so that cold air flows from one end side to the other end side of the auxiliary air passage (26) via the auxiliary air passage (26). Is sent to warm air. On the contrary, in the second position, a large amount of air (hot air) flows to the heated air passage (16) side, so that the hot air is cooled from the other end side to the one end side through the auxiliary air passage (26). Sent out.

  In addition, since the air mix guide (22) and the door main body (23) are integrally formed, the number of parts can be reduced as compared with the case where these are provided as separate parts. As a result, the increase in the number of parts does not reduce the internal space of the vehicle air conditioner and does not reduce the air flow.

  According to a second aspect of the present invention, in the vehicle air conditioner according to the first aspect, when the door main body (23) is in a position to close the heated air passage (16), the air mix guide (22) is bypassed. It arrange | positions substantially parallel to the air flow direction in a channel | path (15), It is characterized by the above-mentioned.

  In this invention, when the door main body (23) is in a position to close the heated air passage (16), the air mix guide (22) is arranged substantially parallel to the air flow direction in the bypass passage (15). Therefore, the fall of air flow property is suppressed. For example, when the amount of blown air is maximum (Max Cool), the effect of the present invention is remarkable. Focusing on the fact that the control position of the air mix door (20) is different between the case where the air mixing characteristics must be improved and the case where the decrease in air flowability must be suppressed, the auxiliary air passage (26) ( The air mix guide (22)) is formed with respect to the air mix door (20) in a position and a direction in which air mixing characteristics are improved and a decrease in air flow property is suppressed.

  According to a third aspect of the present invention, in the vehicle air conditioner according to the first or second aspect, the air mix guide (22) when the door body (23) is in a position to close the bypass passage (15). Is characterized by being arranged substantially parallel to the direction of air flow in the heated air passage (16).

  In the present invention, when the door main body (23) is in a position to close the bypass passage (15), the air mix guide (22) is disposed substantially parallel to the air flow direction in the heated air passage (16). Therefore, the fall of air flow property is suppressed. For example, this is the case where the blown air volume is maximum (Max Hot).

  According to a fourth aspect of the present invention, in the vehicle air conditioner according to any one of the first to third aspects, the air mix door (20) rotates about a predetermined rotation shaft (21). When the door main body (23) and the air mix guide (22) are rotated around the rotation shaft (21), one end side of the auxiliary air passage (26) is a bypass passage ( 15), and the other end of the auxiliary air passage (26) moves in the heated air passage (16).

  In this invention, the air mix door (20) can be simply configured so as to be rotated about the predetermined rotation shaft (21), and the effects of the invention described above can be achieved.

  According to a fifth aspect of the present invention, in the vehicle air conditioner according to the fourth aspect, the rotating shaft (21) is rotatably supported by the air conditioning case (11), and the air mix guide (21) is rotated. It is characterized by being arranged in the vicinity of the axis (21) and substantially parallel to the rotation axis (21).

  In this invention, an air mix door (20) can be comprised more simply and the effect of the invention as described above can be achieved.

  According to a sixth aspect of the present invention, in the vehicle air conditioner according to any one of the first to fifth aspects, a mixed region of cooling air and heated air generated through the auxiliary air passage (26) ( Ma2, Mb2, Mc2, Md2, Md3, and Me1) are formed in at least one region of the bypass passage (15) and the heated air passage (16).

  In this invention, the auxiliary air passage (26) forms a mixed region of the cooling air and the heated air over a wide range from the bypass passage (15) to the heated air passage 16, so that the air mix door (20) The air mixing characteristics can be further improved.

  According to a seventh aspect of the present invention, in the vehicle air conditioner according to any one of the first to sixth aspects, the first position is a door main body portion (23 compared to the second position). ) Is a position where the area for opening the bypass passage (15) is large and the area for opening the heated air passage (16) is small.

  In the present invention, a larger amount of air (cold air) flows on the bypass path (15) side at the first position than at the second position. Therefore, in the first position, it is easier for the cool air to be sent out from the one end side to the other end side of the auxiliary air passage (26) via the auxiliary air passage (26) than in the second position. On the other hand, in the second position, it is easier for warm air to be sent out from the other end side to the one end side via the auxiliary air passage (26) than in the first position. As a result, the mixing characteristics of the air mix door (20) can be improved.

  Incidentally, the reference numerals in parentheses of each means described above are an example showing the correspondence with the specific means described in the embodiments described later.

(First embodiment)
(Constitution)
FIG. 1 shows the best mode of the present invention. In the present embodiment, the present invention is applied to a rear seat air conditioner among vehicle air conditioners. This rear seat air conditioner is roughly divided into two parts: an air conditioning main unit 10 shown in FIG. 1 and a blower unit (not shown) for blowing air to the air conditioning main unit 10.

  The air conditioning main unit 10 is disposed inside a rear console (not shown), and has a resin air conditioning case 11 that forms an air passage that blows air toward a rear seat in the vehicle interior. In this air conditioning case 11, an evaporator 12 that forms a heat exchanger for cooling and a heater core 13 that forms a heat exchanger for heating are incorporated. An air inlet space 14 is formed in a portion of the air conditioning case 11 on the vehicle front side. The air inlet space 14 is supplied with the air blown from the centrifugal blower of the blower unit.

  In the air conditioning case 11, an evaporator 12 as a heat exchanger for cooling is disposed substantially vertically at a portion immediately after the air inlet space 14. The low-pressure refrigerant of the well-known refrigeration cycle flows inside the evaporator 12, the latent heat of evaporation of the low-pressure refrigerant is absorbed from the blown air passing through the evaporator 12 to the low-pressure refrigerant, and the blown air is cooled.

  A heater core 13 serving as a heat exchanger for heating is disposed at a predetermined interval on the downstream side of the air flow of the evaporator 12. Hot water (engine cooling water) flows from the vehicle engine (not shown) to the heater core 13, and the hot water is used as a heat source to heat the cold air that has passed through the evaporator 12.

  An air mix door 20 is disposed above the heater core 13, that is, in a bypass passage 15 as a bypass passage through which low-temperature air cooled by the evaporator 12 flows around the heater core 13. A heated air passage 16 through which high-temperature air heated by the heater core 13 is sent is provided on the downstream side of the heater core 13.

  The air mix door 20 adjusts the blowing temperature by mixing the low-temperature air cooled by the evaporator 12 and the high-temperature air heated by the heater core 13. In this embodiment, the air mix door 20 swings around the rotary shaft 21. The swing door is controlled. As shown in FIGS. 2 and 3, the air mix door 20 includes a rotating shaft 21, an air mix guide 22, a door main body 23, a connecting portion 24, and a seal portion 25.

  The rotating shaft 21 is fixed to the air conditioning case 11 so as to be swingable with respect to the air conditioning case 11. The air mix guide 22 is a guide that introduces the low temperature air into the region where the high temperature air flows by changing the flow of the low temperature air, and introduces the high temperature air into the region where the low temperature air flows by changing the flow of the high temperature air. . The air mix guide 22 is formed in a plate shape, and is disposed in the direction parallel to the rotation shaft 21 and in the vicinity of the rotation shaft 21 (in FIG. 2, the rotation shaft 21 is on the air mix guide 22). Yes.

  The door body 23 changes or blocks the flow of high-temperature air or low-temperature air, and is formed by forming a plate-like member into a shape whose cross section is an obtuse angle. It arrange | positions in the site | part which shifted | deviated from both the axis | shaft 21 and the air mix guide 22. FIG. The connecting portion 24 extends in a plate shape from both ends of the door body portion 23 in the direction of the “U” to the air mix guide 22 in a direction perpendicular to the “U” direction, Coupled to guide 22. In this way, the door main body 23 and the air mix guide 22 are connected by the connecting portion 24, and an auxiliary air passage 26 is formed therebetween.

  In the present embodiment, the rotating shaft 21, the air mix guide 22, the door main body portion 23, and the connecting portion 24 are integrally formed of resin or metal. As shown in FIG. 2, the rotating shaft 21 may be disposed on the upper surface of the air mix guide 22 or may be disposed on the connecting portion 24. However, when arranged on the connecting portion 24, if the rotary shaft 21 is formed in the auxiliary air passage 26, the rotary shaft 21 becomes a resistance to air flow, so the rotary shaft 21 is formed in the auxiliary air passage 26. do not do. That is, the rotating shaft 21 is formed so as to extend from both the connecting portions 24 toward the outer side (air conditioning case 11) opposite to the auxiliary air passage 26.

  The seal portion 25 is provided when the door main body portion 23 comes into contact with the door seal portions 11a and 11b of the air conditioning case 11 or the door seal portion 13a formed on the heater core 13 (see FIG. 1), and the door seal portion on the side wall of the air conditioning case 11 11c and the air mix door 20 are in contact with each other (see FIG. 4) to ensure airtightness, and are formed of an elastic material such as urethane foam or rubber. As shown in FIG. 3, the seal portion 25 is attached to the air mix door 20.

  Here, when the foot part 23a of the door main body part 23 abuts on the door seal part 11a of the air conditioning case 11, the foot part 23b of the door main body part 23 abuts on the door seal part 13a formed on the heater core 13, but at this time The rotational position of the air mix door 20 is defined as 100%. When the foot 23a of the door main body 23 comes into contact with the door seal portion 13a formed on the heater core 13, the foot 23b of the door main body 23 comes into contact with the door seal 11b of the air conditioning case 11. The rotational position of the door 20 is defined as 0%. And the position which distributed equally between these positions with the angle was defined as the rotation position% of the air mix door 20. As shown in FIG.

  Further, the foot 23a of the door main body 23 is in contact with the door seal portion 11a on the front surface and the door seal portion 13a on the back surface. As for the foot | leg part 23b of the door main-body part 23, the surface of the front side contacts the door seal part 11b, and the surface of the back side contacts 13a. Therefore, including the above-described door seal portion 11c on the side wall of the air conditioning case 11 and the contact portion of the air mix door 20 (see FIG. 4), FIG. 3B and FIG. As shown in FIG. 3C, seal portions 25 are attached to the four surfaces of the foot portion 23a and the foot portion 23b of the door main body portion 23, that is, the front surface, the back surface, and both side surfaces.

  The auxiliary air passage 26 swings integrally with the door body 23 to introduce the low-temperature air cooled by the evaporator 12 into the high-temperature air heated by the heater core 13, or conversely, the high-temperature air heated by the heater core 13 This is an air passage that is introduced into the low-temperature air cooled by the evaporator 12.

  The foot blowout port 31 and the face blowout port 32 blow the air (air conditioned air) whose temperature is adjusted by the air mix door 20 onto the face and the foot of the passenger in the rear seat, respectively. The air mode door 33 closes or opens the foot outlet 31 and the face outlet 32 to blow out conditioned air from both the foot outlet 31 and the face outlet 32 (bi-level mode). It is a door that blows out conditioned air (foot mode or face mode) from one of the outlet 31 or the face outlet 32.

(Operation)
This embodiment will be described in the above configuration.

  FIG. 5A shows a case where the air mix door 20 is controlled to a rotational position of 40% in the bi-level mode. The low temperature air cooled by the evaporator 12 and the high temperature heated by the heater core 13 are shown. Air is mixed by the air mix door 20. In the present embodiment, since the auxiliary air passage 26 is formed in the air mix door 20, a plurality of mixing regions (Ma1, Ma2, Ma3) of low temperature air and high temperature air are formed, and the mixing performance of the air mix door 20 Is improved. This is because the flow of low-temperature air is introduced into the flow of high-temperature air by the auxiliary air passage 26 to newly form the mixing region Ma2.

  The mixing region Ma <b> 2 is formed on the downstream side of the heated air passage 16. Further, a mixing region Ma1 is generated due to a passage formed by the door main body portion 23 of the air mix door 20 and the door seal portion 13a on the heater core 13, and the air mix guide 22 of the air mix door 20 and the air conditioning case 11 The mixing region Ma3 is generated due to the formed passage.

  Particularly, in the rear seat air conditioner, since the mounting space is narrow, the mixing area of the low temperature air and the high temperature air cannot be widened in the air conditioning case 11 of the air conditioning main body unit 10, but according to the present embodiment, it is narrow. Even in the mixing region, sufficient mixing performance of the air mix door 20 can be ensured.

  FIG. 5B shows a case where the air mix door 20 is controlled to a rotational position of 70% in the bi-level mode. In this case, the flow of the high-temperature air is caused by the auxiliary air passage 26 so that the flow of the high-temperature air Since the mixing region Mb2 is newly formed, the mixing performance of the air mix door 20 is improved.

  The mixing region Mb2 is formed in the bypass passage 15. Further, a mixing region Mb1 is generated due to a passage formed by the door main body portion 23 of the air mix door 20 and the door seal portion 13a on the heater core 13, and the air mix guide 22 of the air mix door 20 and the air conditioning case 11 The mixed region Mb3 is generated due to the formed passage. Even in the same bi-level mode, the blowing temperature is set higher in FIG. 5B than in the case of FIG.

  FIG. 6 shows a case where the air mix door 20 is controlled to the 20% rotational position in the face mode, and FIG. 7 shows that the air mix door 20 is controlled to the 70% rotational position in the foot mode. Shows the case. In FIG. 6, the auxiliary air passage 26 introduces a flow of low-temperature air into the flow of high-temperature air, thereby newly forming a mixing region Mc2. Further, the mixing region Mc <b> 1 is generated due to the passage formed by the door main body portion 23 of the air mix door 20 and the door seal portion 13 a on the heater core 13.

  In FIG. 7, the auxiliary air passage 26 causes a mixing region Md <b> 2 that is generated by introducing a flow of high-temperature air into the flow of low-temperature air, or a mixing region that is generated by introducing a flow of low-temperature air into the flow of hot air At least one mixed region of Md3 is newly formed. Further, a mixing region Md1 is generated due to a passage formed by the door main body portion 23 of the air mix door 20 and the door seal portion 13a on the heater core 13, and the air mix guide 22 of the air mix door 20 and the air conditioning case 11 The mixed region Md4 is generated due to the formed passage. Therefore, the mixing performance of the air mix door 20 is improved in both the face mode and the foot mode.

  On the other hand, when importance is attached to air flow in the air conditioning case 11, that is, when the maximum amount of low-temperature air is blown out in the face mode (Max Cool), or when the maximum amount of high-temperature air is blown out in the foot mode (Max Hot). Then, as shown in FIGS. 8 and 9, the air flowability is not lowered in the above configuration.

  As shown in FIG. 8, at the time of Max Cool, the auxiliary air passage 26 is arranged in the same direction as the direction in which the low temperature air flows through the bypass passage 15, and thus acts as an air passage. Therefore, the air flowability is not lowered by the air mix door 20 (auxiliary air passage 26). Further, as shown in FIG. 9, during the max hot, the auxiliary air passage 26 is arranged in a direction perpendicular to the bypass passage 15, but the auxiliary air passage 26 functions as a new bypass passage, that is, an air passage. To do.

  Therefore, a decrease in air flowability due to the air mix door 20 (auxiliary air passage 26) is suppressed. Therefore, in any case, when the maximum amount of air is blown, an excessive burden is not imposed on the blower unit.

  That is, by controlling the rotational position of the air mix door 20, the mixing ratio of the high temperature air and the low temperature air is controlled, and the blowing temperature is controlled. In conjunction with this, the direction and position of the auxiliary air passage 26 is controlled, and when the high temperature air and the low temperature air need to be mixed, the auxiliary air passage 26 allows the flow of the low temperature air and the high temperature air to communicate with each other. The auxiliary air passage 26 acts as an air passage when it acts as a passage and it is necessary to suppress a decrease in air flowability due to the air mix door 20.

  Therefore, air mixing characteristics are improved, and a decrease in air flowability is suppressed. Further, as described above, not only a plurality of mixing regions are formed by the auxiliary air passage 26, but also the formation region extends over a wide range from the bypass passage 15 to the downstream side of the heating air passage 16. Air mixing characteristics are improved.

(Second Embodiment)
In the first embodiment, the air mix door 20 is configured by a swing door in which an auxiliary air passage 26 is formed. In the present embodiment, the air mix door 20 is configured by a rotary door in which an auxiliary air passage is formed. As shown in FIG. 10, as in the above-described embodiment, the air mix door 20 has a bypass path as a bypass path above the heater core 13, that is, low-temperature air cooled by the evaporator 12 flows around the heater core 13. 15 is arranged. As shown in FIGS. 11 and 12, the air mix door 20 includes a rotating shaft 21, an air mix guide 22, a door main body 23, a connecting portion 24, and a seal portion 25.

  The rotating shaft 21 is fixed to the air conditioning case 11 so as to be rotatable with respect to the air conditioning case 11. The air mix guide 22 is a guide that introduces the low temperature air into the region where the high temperature air flows by changing the flow of the low temperature air, and introduces the high temperature air into the region where the low temperature air flows by changing the flow of the high temperature air. . The door main body 23 changes or blocks the flow of high-temperature air or low-temperature air. The connecting portion 24 extends from both ends of the door main body portion 23 in the direction of the rotating shaft 21 in a plate shape toward the air mix guide 22 and is coupled to the air mix guide 22.

  As shown in FIG. 11, the door main body 23 and the connecting portion 24 form a circular tube whose both ends are closed, and a side portion is partially removed. That is, the side part of the circular pipe that remains without being removed constitutes the door main body 23, and the surface that closes both ends of the circular pipe constitutes the connecting part 24. The air mix guide 22 is formed as a plate-like member that connects both the connecting portions 24, and is disposed in the direction parallel to the rotating shaft 21 and in the vicinity of the rotating shaft 21. The rotating shaft 21 is formed so as to extend from both the connecting portions 24 toward the outside of the circular pipe (the air conditioning case 11). The door main body 23 is disposed at a position that is deviated from both the rotary shaft 21 and the air mix guide 22.

  In this way, the door main body 23 and the air mix guide 22 are connected by the connecting portion 24, and an auxiliary air passage 26 is formed therebetween. However, as is clear from comparison between FIGS. 5, 10, and 11, the auxiliary air passage 26 of the rotary door 20 according to the present embodiment is the same as the door main body 23 and the heater core 13 in the swing door 20 of the first embodiment. This corresponds to the total of the passage formed by the upper door seal portion 13a and the auxiliary air passage 26.

  The seal portion 25 is used when the door main body portion 23 comes into contact with the door seal portions 11a and 11b of the air conditioning case 11 or the door seal portion 13a formed on the heater core 13 (see FIG. 10), and the door seal portion on the side wall of the air conditioning case 11 11c and the air mix door 20 are in contact with each other (see FIG. 13) to ensure airtightness, and are formed of an elastic material such as urethane foam or rubber. The seal portion 25 is attached to the air mix door 20 as shown in FIGS. 11 and 12. Comparing FIG. 1 and FIG. 10, the door seal portions 11a, 11b, 11c, and 13a are different in shape, but have the same function.

  However, in this embodiment, only the surface on the front side of the door main body portion 23 comes into contact with the door seal portions 11a, 13a, and 11b. Accordingly, the seal portion 25 is attached only to the front side surface of the door main body portion 23. Therefore, in this embodiment, compared with 1st Embodiment, the seal | sticker part 25 becomes a simple shape and the sticking operation | work also becomes simple.

  Similarly to the above-described embodiment, the auxiliary air passage 26 rotates integrally with the door body 23 to introduce the low-temperature air cooled by the evaporator 12 into the high-temperature air heated by the heater core 13 or vice versa. The high temperature air heated by the heater core 13 is introduced into the low temperature air cooled by the evaporator 12.

(Operation)
This embodiment will be described in the above configuration.

  FIG. 14 shows a case where the air mix door 20 is controlled to a rotational position of 40% in the bi-level mode. The low-temperature air cooled by the evaporator 12 and the high-temperature air heated by the heater core 13 are air. It is mixed by the mix door 20. Also in this embodiment, since the auxiliary air passage 26 is formed in the air mix door 20, a plurality of mixing regions (Me1, Me2) of low temperature air and high temperature air are formed, and the mixing performance of the air mix door 20 is improved. Is done. This is because the auxiliary air passage 26 introduces a flow of low-temperature air into the flow of high-temperature air and newly forms a mixing region Me1. Specifically, the mixing region Me1 is generated due to the auxiliary air passage 26, and the mixing region Me2 is generated due to the passage formed by the air mix guide 22 of the air mix door 20 and the air conditioning case 11.

  Moreover, the mixing performance of the air mix door 20 is improved in both the face mode and the foot mode, as in the above-described embodiment.

  On the other hand, when importance is attached to air flow in the air conditioning case 11, that is, when the maximum amount of low-temperature air is blown out in the face mode (Max Cool), or when the maximum amount of high-temperature air is blown out in the foot mode (Max Hot). Then, as shown in FIGS. 15 and 16, the air flowability is not lowered in the above configuration.

  As shown in FIG. 15, at the time of Max Cool, the auxiliary air passage 26 is arranged in the same direction as the bypass passage 15 and acts as an air passage. Therefore, the air flow property is lowered by the air mix door 20 (auxiliary air passage 26). Does not occur. As shown in FIG. 16, at the time of Max Hot, the auxiliary air passage 26 is arranged in a direction perpendicular to the bypass passage 15, but the auxiliary air passage 26 acts as a new bypass passage, that is, an air passage. A decrease in air flow property due to the air mix door 20 is suppressed. Therefore, when blowing out the maximum amount of air, an excessive burden is not imposed on the blower unit.

  The present invention pays attention to the fact that the control position of the air mix door 20 differs between the case where the air mixing characteristics must be improved and the case where the decrease in air flowability must be suppressed. The auxiliary air passage 26 is formed with respect to the air mix door 20 in a position and a direction in which air mixing characteristics are improved and a decrease in air flow property is suppressed. Therefore, various modifications other than the shape of the air mix door 20 in the above-described embodiment are conceivable.

  In the above-described embodiment, the present invention is applied to the rear seat air conditioner. However, the present invention may be applied to the front seat air conditioner. In the above-described embodiment, the rear seat air conditioner has a small mounting space, so that the improvement of the mixing performance of the air mix door 20 according to the present invention and the suppression of the air flow property deterioration by the air mix door 20 appear remarkably. On the other hand, in the case of the air conditioner for the front seat, the mounting space is not narrow compared to the air conditioner for the rear seat. can get.

  The difference between the front seat air conditioner and the rear seat air conditioner is that, instead of the air mode door 33, a foot door (not shown) dedicated to the foot outlet 31 and a face door dedicated to the face outlet 32 (see FIG. And a defroster outlet (not shown) for blowing conditioned air toward the inside of the front window, and a defroster door (not shown) dedicated to the defroster outlet. .

  As the air blowing mode, in addition to the bi-level mode, foot mode, and face mode in the above-described embodiment, a foot defroster mode and a defstar mode are set. In the defstar mode, the foot outlet 31 and the face outlet 32 are closed by the foot door and the face door, respectively, and conditioned air is blown out only from the defroster outlet. In the foot / defroster mode, 50% of conditioned air is blown out from both the foot outlet 31 and the defroster outlet. In the foot mode, 70-80% conditioned air is blown from the foot outlet 31 and 20-30% conditioned air is blown from the defroster outlet.

It is a schematic diagram which shows the air-conditioning main body unit of the air conditioning apparatus for rear seats in 1st Embodiment of this invention. (A) is a perspective view of the air mix door in 1st Embodiment of this invention, (b) is A view of (a), (c) is B view of (a). (A) And (b) is the figure which stuck the seal | sticker part to (a) and (b) of FIG. 2, respectively, (c) is CC sectional drawing of (b) of FIG. . It is DD sectional drawing of FIG. (A) is a schematic diagram which shows the air mixing property in the rotation position of 40% of the air mix door in 1st Embodiment of this invention in bi level mode, (b) is the air mixing in the rotation position of 70% similarly. It is a schematic diagram which shows property. In face mode, it is a schematic diagram which shows the air mixing property in the rotation position of 20% of the air mix door in 1st Embodiment of this invention. In foot mode, it is a schematic diagram which shows the air mixing property in the rotation position of 70% of the air mix door in 1st Embodiment of this invention. It is a schematic diagram which shows the air flowability of the air mix door in 1st Embodiment of this invention at the time of Max Cool. It is a schematic diagram which shows the air flowability of the air mix door in 1st Embodiment of this invention at the time of Max hot. It is a schematic diagram which shows the air-conditioning main body unit of the rear seat air conditioner in 2nd Embodiment of this invention. (A) is a perspective view of the air mix door in 2nd Embodiment of this invention, (b) is EE sectional drawing of (a), (c) is F F view of (a). (A), (b), and (c) are the figures which stuck the seal | sticker part to (a), (b), and (c) of FIG. 11, respectively. It is GG sectional drawing of FIG. It is a schematic diagram which shows the air mixing property in the rotation position of 40% of the air mix door in 2nd Embodiment of this invention in bi level mode. It is a schematic diagram which shows the air flowability of the air mix door in 2nd Embodiment of this invention at the time of Max Cool. It is a schematic diagram which shows the air flowability of the air mix door in 2nd Embodiment of this invention at the time of Max hot.

Explanation of symbols

10 ... Air conditioning main unit 11 ... Air conditioning case 12 ... Evaporator (cooling heat exchanger)
13 ... Heater core (heat exchanger for heating)
15 ... Bypass passage (bypass passage)
16 ... Heated air passage 20 ... Air mix door 21 ... Rotating shaft 22 ... Air mix guide 23 ... Door main body 24 ... Connection portion 26 ... Auxiliary air passage Ma2, Mb2, Mc2, Md2, Md3, Me1 ... Mixing region

Claims (7)

An air conditioning case (11) forming an air passage;
A cooling heat exchanger (12) installed in the air conditioning case (11) for cooling air;
A heating heat exchanger (13) that is provided in the air conditioning case (11) and heats the air that has passed through the cooling heat exchanger (12);
A bypass passage (15) in which the cool air sent from the cooling heat exchanger (12) flows around the heating heat exchanger (13);
A heated air passage (16) through which warm air sent from the heating heat exchanger (13) flows;
The temperature of the conditioned air is adjusted by adjusting the mixing ratio of the cooling air heat exchanged by the cooling heat exchanger (12) and the heating air heat exchanged by the heating heat exchanger (13). An air conditioner for vehicles provided with an air mix door (20),
The air mix door (20) opens and closes the bypass passage (15) and the heated air passage (16) to adjust the amount of air passing through both passages (15, 16). And an air mix guide (22) disposed at a position distant from the door main body (23), and a connecting portion for integrally connecting the door main body (23) and the air mix guide (22) ( 24)
An auxiliary air passage (26) is formed between the door body (23) and the air mix guide (22),
When the door body (23) is in the first position opening the bypass passage (15) and the heated air passage (16), the auxiliary air passage (26) is interposed via the auxiliary air passage (26). 26) the cold air is sent to the hot air from one end side to the other end side,
When the door main body (23) is in the second position opening the bypass passage (15) and the heated air passage (16), the auxiliary air passage (26) is interposed via the auxiliary air passage (26). 26) The air conditioner for vehicles, wherein the warm air is sent to the cold air from the other end side to the one end side.   When the door body (23) is in a position to close the heated air passage (16) and open the bypass (15), the air mix guide (22) is in the direction of air flow in the bypass passage (15). The vehicle air conditioner according to claim 1, wherein the vehicle air conditioner is disposed substantially in parallel with the vehicle air conditioner.   When the door main body (23) is in a position to close the bypass passage (15) and open the heated air passage (16), the air mix guide (22) flows the air in the heated air passage (16). The vehicle air conditioner according to claim 1, wherein the vehicle air conditioner is disposed substantially parallel to the direction. The air mix door (20) is configured to be rotated around a predetermined rotation axis (21),
When the door body portion (23) and the air mix guide (22) are rotated around the rotation shaft (21), the one end side of the auxiliary air passage (26) is connected to the bypass passage (15). The other end side of the auxiliary air passage (26) moves within the heated air passage (16). Vehicle air conditioner. The rotating shaft (21) is rotatably supported by the air conditioning case (11),
The vehicle air conditioner according to claim 4, wherein the air mix guide (21) is disposed in the vicinity of the rotating shaft (21) and substantially parallel to the rotating shaft (21). A mixing region (Ma2, Mb2, Mc2, Md2, Md3, Me1) of the cooling air and the heating air generated through the auxiliary air passage (26) is set to at least the bypass passage (15) and the heating air passage ( The vehicle air conditioner according to any one of claims 1 to 5, wherein the vehicle air conditioner is formed in one of the regions.   Compared to the second position, the first position means that the door main body (23) has a larger area for opening the bypass passage (15) and a smaller area for opening the heating air passage (16). The vehicle air conditioner according to any one of claims 1 to 6, characterized in that

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