JP2014189176A - Vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle air conditioner excellent in mixture of cold air and hot air and including a rotary door that functions as a mode door.SOLUTION: A cold air guide 61 and a hot air guide 62 are provided in a rotary door 41. The guides 61 and 62 guide cold air and hot air to a center of the rotary door 41, respectively. Therefore, the air flowing into the rotary door 41 from a cold air inlet portion 18 and that flowing into the rotary door 41 from a hot air inlet portion 21 can collide against each other at the center of the rotary door 41. The cold air and the hot air are thereby mixed together at the center of the rotary door 41. If the rotary door 41 rotates, relative positions of a plurality of opening portions 51 to 53, which are provided in the rotary door 41, to a plurality of blowout paths 31 to 33 change to open or close the blowout paths 31 to 33. Therefore, the rotary door 41 function as a so-called mode door.

Description

  The present invention relates to a vehicle air conditioner including a rotary door having functions of a mode door and an air mix door.

  Patent Document 1 discloses a vehicle air conditioner having a configuration in which a mode door for switching a blowing mode and an air mix door are separated. The vehicle air conditioner described in Patent Document 1 is provided with a guide portion inside the mode door. In the bi-level (BL) mode, the guide portion is in a position where the cold air and the warm air are separated to widen the vertical temperature difference. The guide portion is intended to reduce the temperature difference between the upper and lower sides in the face differential (FD) mode.

JP-A-8-268038

  Since the vehicle air conditioner described in Patent Document 1 has a configuration in which the mode door and the air mix door are separated from each other, there is a problem that the vehicle becomes large. For example, if the configuration is made by simply removing the air mix door from the vehicle air conditioner described in Patent Document 1 for miniaturization, the cool air and the warm air are not mixed at all until the mode door. Therefore, there is a problem in that the temperature difference between the upper and lower temperatures is excessive in the BL mode in the guide portion in the mode door. In addition, there is a problem that the temperature difference between the upper and lower temperatures is insufficiently reduced because there is a leakage path to the warm FOOT even in the FD mode. Therefore, a structure having both an air mix function and a mode door function is necessary for downsizing.

  Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a vehicle air conditioner including a rotary door that is excellent in mixing cold air and warm air and functions as a mode door.

  The present invention employs the following technical means in order to achieve the aforementioned object.

  The present invention communicates with the inside of the rotary door by the displacement of the opening due to the angular displacement of the rotary door, and in the open state where the cold air flows into the inside of the rotary door, the cold air inflow portion (18), and the rotary door Displacement of the opening portion due to the angular displacement of the air passage communicates with the inside of the rotary door, and in the open state in which the air passage is open, the warm air flows into the inside of the rotary door (21) and the warm air inflow portion (21) is provided inside the rotary door. A cold air guide (61) for guiding the cold air from the cold air inflow portion to the center of the rotary door, and a temperature for guiding the hot air from the hot air inflow portion to the center of the rotary door provided inside the rotary door. And a wind guide (62).

  According to the present invention, the cold air guide and the hot air guide are provided inside the rotary door. Each guide guides cold air and hot air to the center of the rotary door, respectively. Therefore, the air that has flowed into the rotary door from the cold air inflow portion and the hot air inflow portion can collide with the center of the rotary door. As a result, cold air and hot air are mixed in the center of the rotary door. When the rotary door rotates, since the rotary door is provided with a plurality of openings, the relative position between the position of the opening and the plurality of outlet passages changes, and the plurality of outlet passages are opened and closed. Therefore, the rotary door functions as a so-called mode door. As described above, since the cold air and the hot air are mixed inside the rotary door, the air passing through the rotary door and flowing into each blowout passage can be mixed air. Thereby, it is possible to realize a rotary door that is excellent in mixing cold air and warm air and functions as a mode door.

  In addition, the code | symbol in the bracket | parenthesis of each above-mentioned means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is sectional drawing of the vehicle air conditioner 10 of 1st Embodiment. It is sectional drawing which expands and shows a part of vehicle air conditioner. It is sectional drawing which shows the position of the rotary door 41 in face mode. It is sectional drawing which shows the position of the rotary door 41 in bilevel mode. It is sectional drawing which shows the position of the rotary door 41 in foot mode. It is sectional drawing which shows the position of the rotary door 41 in foot differential mode. It is sectional drawing which shows the position of the rotary door 41 in a defroster mode. It is a graph which shows an example of the relationship between guide length and an up-and-down temperature difference. It is a graph which shows an example of the relationship between guide length and pressure loss (pressure loss). It is sectional drawing of 10A of vehicle air conditioners of 2nd Embodiment. It is sectional drawing which shows the position of the rotary door 41 in a defroster mode.

  Hereinafter, a plurality of embodiments for carrying out the present invention will be described with reference to the drawings. In some embodiments, portions corresponding to the matters described in the preceding embodiments may be given the same reference numerals, or one letter may be added to the preceding reference numerals, and overlapping descriptions may be omitted. In addition, when a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those of the embodiment described in advance. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination does not hinder the combination.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1 indicate the direction in the vehicle mounted state. The vehicle left-right (width) direction is a direction perpendicular to the paper surface of FIG.

  The vehicle air conditioner 10 is mounted at a substantially central portion in the vehicle left-right direction inside an instrument panel (instrument panel) located in the front part of the vehicle interior. A blower (not shown) is disposed on the vehicle front side of the vehicle air conditioner 10. The blower has a blower fan constituted by a centrifugal multiblade fan (sirocco fan), and is configured to rotate this blower fan by an electric motor (not shown). An inside / outside air switching box (not shown) is connected to the suction side of the blower fan. The blower fan sucks outside air or inside air introduced through the inside / outside air switching box and blows air toward the frontmost space in the air conditioning case 11.

  The air conditioning case 11 constitutes an air passage 12 through which blown air from the blower fan flows. Inside the air conditioning case 11, an evaporator 13 is disposed as a cooling heat exchanger. The evaporator 13 is in a position where the entire amount of air blown from the blower fan passes from the vehicle front side to the rear side.

  The evaporator 13 has a well-known structure in which a plurality of flat tubes (not shown) forming a refrigerant passage and corrugated heat transfer fins (not shown) that increase the air-side heat transfer area are alternately stacked. The heat exchange core unit 14 is configured. The low-pressure refrigerant decompressed by the decompression means (not shown) of the refrigeration cycle absorbs heat from the air passing through the evaporator 13 through the tube of the heat exchange core section 14 of the evaporator 13 and evaporates, thereby cooling the passing air. The

  In the air conditioning case 11, a hot water heater core 15 serving as a heat exchanger for heating is disposed on the leeward side (vehicle rear side) of the evaporator 13. The heater core 15 heats air using hot water from a vehicle engine (not shown) as a heat source. The heater core 15 is formed by laminating a number of flat tubes (not shown) that form a hot water passage and corrugated heat transfer fins (not shown) that increase the air-side heat transfer area in the vehicle left-right direction. It has the well-known heat exchange core part 16 joined.

  Further, since the heater core 15 is significantly smaller in height than the evaporator 13, a cold air passage 17 is provided between the upper end portion of the heater core 15 and the upper surface portion of the air conditioning case 11 to bypass the heater core 15 and through which cold air flows. It is formed. A downstream portion of the cold air passage 17 serves as a cold air inflow portion 18 through which the cold air flows into the mixing space 19.

  On the other hand, in the air conditioning case 11, a hot air passage 20 is formed on the downstream side of the air flow of the heater core 15 from the immediately after the heater core 15 to the upper side. A downstream portion of the warm air passage 20 serves as a warm air inflow portion 21 through which the warm air flows into the mixing space 19. Therefore, the cold air from the cold air passage 17 and the hot air from the hot air passage 20 are merged in the downstream side of the cold air passage 17 and the hot air passage 20 from the intersecting direction to mix the cold air and the hot air. A mixing space 19 is formed.

  In the upper surface of the air conditioning case 11, a defroster outlet passage 31 is opened at a front portion of the vehicle. The defroster outlet passage 31 is supplied with temperature-controlled air from the mixing space 19 and is connected to a defroster outlet through a defroster duct (not shown). The wind is blown out.

  In the upper surface portion of the air conditioning case 11, a face blowing passage 32 is opened at a portion on the vehicle rear side from the defroster blowing passage 31. The face blowout passage 32 also receives the temperature-controlled air from the mixing space 19. The face outlet passage 32 is connected to a face outlet through a face duct (not shown), and blows wind from the outlet toward an occupant's head and chest in the passenger compartment.

  In the upper surface portion of the air conditioning case 11, a foot outlet passage 33 is opened at a position on the vehicle rear side of the face outlet passage 32. The foot blowing passage 33 also receives the temperature-controlled air from the mixing space 19. The downstream side of the foot outlet passage 33 is connected to a foot outlet through a foot duct (not shown), and air is blown out from the outlet toward the feet of the occupant.

  A rotary door 41 is disposed in the mixing space 19. The outlet passages 31 to 33 and the inflow portions 18 and 21 are arranged on the outer side in the radial direction of the rotary door 41. The rotary door 41 is supported in the air conditioning case 11 so as to be angularly displaceable. The rotary door 41 is made of, for example, a resin material, and includes a door plate portion 42 that is an arcuate wall portion separated from the rotation shaft (drive shaft) L by a predetermined amount. The door plate portion 42 of the rotary door 41 is angularly displaced about the rotation axis L. The door plate part 42 has three openings 51 to 53. The three openings 51 to 53 of the door plate portion 42 are portions for opening and closing the outlet passages 31 to 33 and the inflow portions 18 and 21. For example, the displacement of the first opening 51 and the third opening 53 due to the angular displacement of the rotary door 41 communicates with the three outlet passages 31 to 33, and the passage area is adjusted. Further, for example, due to the displacement of the first opening 51 due to the angular displacement of the rotary door 41, the inside of the rotary door 41 and the cold air inflow portion 18 communicate with each other to be in the open state. When the cold air inflow portion 18 is in the open state, the cold air flows toward the inside of the rotary door 41 in the radial direction. Similarly, for example, due to the displacement of the second opening 52 due to the angular displacement of the rotary door 41, the inner side of the rotary door 41 and the hot air inflow portion 21 communicate with each other to be in an open state. When the warm air inflow portion 21 is in the open state, the warm air flows toward the inside of the rotary door 41 in the radial direction.

  In other words, the defroster outlet passage 31, the face outlet passage 32, the foot outlet passage 33, the cold air inflow portion 18, and the hot air inflow portion 21 are opened and closed by the rotary door 41. The rotary door 41 is configured to form a blowing mode in which any one or more of the defroster blowing passage 31, the face blowing passage 32, and the foot blowing passage 33 are opened according to the rotation stop position. Accordingly, the rotary door 41 functions as a so-called blow mode door that switches the blow mode. Further, the rotary door 41 controls the flow rate ratio between the warm air and the cool air by adjusting the open / close ratio of the cool air inflow portion 18 and the warm air inflow portion 21 according to the rotation stop position. Therefore, the rotary door 41 also functions as a so-called air mix door.

  A cold air guide 61 and a hot air guide 62 are provided inside the rotary door 41 in the radial direction. The cold air guide 61 is a member for guiding the cold air from the cold air inflow portion 18 to the center of the rotary door 41. The warm air guide 62 is a member for guiding the warm air from the warm air inflow portion 21 to the center of the rotary door 41. The cold air guide 61 and the hot air guide 62 are formed integrally with the rotary door 41 and rotate integrally with the rotary door 41.

  The cold wind guide 61 is connected to a wall portion located in the thickness direction (the vehicle left-right direction) of the sheet of FIG. One end of the warm air guide 62 is connected to the door plate 42. The cold air guide 61 and the hot air guide 62 extend from one end to the center of the rotary door 41 in the radial direction at the other end. The ends of the cold air guide 61 and the hot air guide 62 on the center side of the rotary door 41 are spaced apart. The center of the rotary door 41 is the rotation center of the rotary door 41. The length L1 of the cold air guide 61 and the length L2 of the hot air guide 62 are equal to each other. The distance L3 between the other end of the cold air guide 61 and the other end of the hot air guide 62 is larger than the passage width L4 in the circumferential direction of the face blowing passage 32 and the passage width L5 in the circumferential direction of the foot blowing passage 33.

  The vehicle air conditioner 10 having the above-described configuration is, for example, an electronic control unit (inputting operation signals from various operation members provided on an air conditioning operation panel (not shown) and sensor signals from various sensors for air conditioning control). (Not shown). The position of each door is controlled by the output signal of this control device.

Next, the operation of the rotary door 41 will be described. 3-7 is a figure which shows the position of the rotary door 41 in five blowing modes. In the vehicle air conditioner 10 of the present embodiment, as shown in FIGS. 3 to 7, for example, a face (FACE) mode, a bi-level (B / L) mode, a foot (FOOT) mode, a foot defroster ( F / D) mode and defroster (DEF) mode. Table 1 shows the open / close states of the outlet passages 51 to 53 and the inflow portions 18 and 21 in each mode. In Table 1, the open state is indicated by ◯, and the closed state is indicated by ×.

  First, the face mode will be described with reference to FIG. The face mode is a mode in which conditioned air (air for air conditioning) is blown mainly toward the passenger's upper body. In the face mode, the face outlet passage 32 is open, the foot outlet passage 33 is closed, the defroster outlet passage 31 is closed, the cold air inlet 18 is open, and the hot air inlet 21 is closed. The rotary door 41 is arranged at a position where the state is reached. As a result, the conditioned air is blown from the mixing space 19 through the face blowing passage 32 into the passenger compartment. Therefore, in the face mode, the rotary door 41 is disposed at the maximum cooling position where the hot air passage 20 passing through the heat exchange core portion 16 of the heater core 15 is fully closed and the cold air passage 17 is fully opened.

  In the face mode, the cold air inflow portion 18 is in an open state. Therefore, the cold air guide 61 guides the cold air toward the center of the rotary door 41. As it is, the cool air flows toward the face blowing passage 32 at a position facing the cold air inflow portion 18. Therefore, the cold air flow resistance can be reduced by the cold air guide 61.

  Next, the bilevel mode will be described with reference to FIG. The bi-level mode is a mode in which conditioned air is blown toward the passenger's upper body and the feet of the passenger. In the bi-level mode, the rotary door 41 is placed at a position where the face blowing passage 32 and the foot blowing passage 33 are open, the defroster blowing passage 31 is closed, and the cold air inflow portion 18 and the hot air inflow portion 21 are open. It is arranged. As a result, the conditioned air is blown from the mixing space 19 through the face blowing passage 32 and the foot blowing passage 33 into the vehicle interior. Therefore, in the bi-level mode, the rotary door 41 is arranged at a position where both the hot air passage 20 and the cold air passage 17 are opened.

  In the case of the bi-level mode, the position of the end of the cold air guide 61 on the cold air inflow portion 18 side is located at the lower end of the opening of the cold air inflow portion 18. Thus, the cold air guide 61 can guide the cold air flowing in from the cold air inflow portion 18 to the center of the rotary door 41.

  Next, the foot mode will be described with reference to FIG. The foot mode is a mode in which air conditioned air is blown mainly toward the passenger's feet. In the foot mode, the rotary door 41 is disposed at a position where the face blowing passage 32 and the defroster blowing passage 31 are closed, the foot blowing passage 33 is opened, and the cold air inflow portion 18 and the hot air inflow portion 21 are in the open state. doing. As a result, the conditioned air is blown from the mixing space 19 through the foot outlet passage 33 into the vehicle interior. Further, in the foot mode, the rotary door 41 is disposed at a position where both the hot air passage 20 and the cold air passage 17 are opened, and the opening of the hot air inflow portion 21 is wider than that in the bi-level mode, and the opening of the cold air inflow portion 18. Is narrow.

  In the foot mode, the position of the end of the cold air guide 61 on the cold air inflow portion 18 side is located at the upper end of the opening of the cold air inflow portion 18. Thus, the cold air guide 61 can guide the cold air flowing in from the cold air inflow portion 18 to the center of the rotary door 41. Further, the position of the end portion of the warm air guide 62 on the warm air inflow portion 21 side is located at the end portion on the upper side of the opening of the warm air inflow portion 21. Accordingly, the hot air guide 62 can guide the hot air flowing in from the hot air inflow portion 21 to the center of the rotary door 41.

  Next, the foot defroster mode (hereinafter, sometimes referred to as “foot differential mode”) will be described with reference to FIG. The foot differential mode is a mode in which conditioned air is blown toward the front window glass and the feet of the passenger. In the foot differential mode, the face outlet passage 32 is closed, the foot outlet passage 33 and the defroster outlet passage 31 are open, and the rotary door 41 is placed at a position where the cold air inlet 18 and the hot air inlet 21 are open. It is arranged. As a result, the conditioned air is blown from the mixing space 19 through the defroster outlet passage 31 and the foot outlet passage 33 into the vehicle interior. Further, in the foot differential mode, the rotary door 41 is arranged at a position where both the hot air passage 20 and the cold air passage 17 are opened, and the opening of the hot air inflow portion 21 is wider than the foot mode, and the opening of the cold air inflow portion 18 is opened. Is narrow.

  Thus, in the foot mode, the foot differential mode, and the bi-level mode, the first opening 51 opens the cold air inflow portion 18 and the second opening 52 opens the hot air inflow portion 21. The cool air guide 61 is in a position for guiding the cool air to the center of the rotary door 41, and the warm air guide 62 is in a position for guiding the warm air to the center of the rotary door 41. Accordingly, the cold air and the hot air collide at the center of the rotary door 41 as shown in FIGS. 4 to 6, and the cold air and the hot air can be mixed. In other words, in the foot mode, the foot differential mode, and the bilevel mode, the cooling and warm air can be opposed to promote stirring.

  Next, the defroster mode will be described with reference to FIG. The defroster mode is a mode in which conditioned air is blown toward the front window glass. In the defroster mode, the face blowing passage 32 and the foot blowing passage 33 are in the closed state, the defroster blowing passage 31 is in the open state, the cold air inflow portion 18 is in the closed state, and the hot air inflow portion 21 is in the open state. A rotary door 41 is arranged. As a result, the conditioned air is blown from the mixing space 19 through the defroster outlet passage 31 into the vehicle interior. In the defroster mode, the rotary door 41 is disposed at the maximum heating position where the hot air passage 20 passing through the heat exchange core portion 16 of the heater core 15 is fully opened and the cold air passage 17 is fully closed.

  Next, effects of the cold air guide 61 and the hot air guide 62 will be described with reference to FIGS. 8 and 9. 8 and 9 indicate the lengths L1 and L2 of each guide. Here, the face passage width L4 is 40 mm, and the foot passage width L5 is 50 mm. The diameter of the rotary door 41 is 125 mm.

  As described above, the length L1 of the cold air guide 61 and the length L2 of the hot air guide 62 are set to the same length (L1 = L2). The inter-guide length L3 is set larger than the face passage width L4 and the foot passage width L5 (L3> L4, L5). The basis for setting these dimensions will be described.

  As shown in FIG. 8, as the guide lengths L1 and L2 are increased, more cold air and hot air collide with each other at the center, so that the upper and lower temperature difference is reduced. When the guide length exceeds 50 mm, the temperature difference between the upper and lower sides suddenly decreases particularly in the bi-level mode. In other words, as shown in FIG. 8, when the guide-to-guide length L3 becomes larger than the passage width (L4, L5), the temperature difference between the upper and lower sides increases because the cool air and the warm air are separated in the bi-level mode.

  However, if the guide length exceeds 40 mm of the face passage width L4, the pressure loss increases in the face mode as shown in FIG. Further, when the guide length exceeds 50 mm of the foot passage width L5, the pressure loss increases in the foot mode as shown in FIG. Therefore, from the relationship between the degree of mixing and the pressure loss, the guide lengths L1 and L2 are preferably in the range indicated by the phantom lines in FIGS. The relationship between the guide lengths L1, L2 and the inter-guide length L3 is such that the inter-guide length L3 decreases as the guide lengths L1, L2 increase. When the inter-guide length L3 is 50 mm which is the same as the foot passage width, the guide lengths L1 and L2 are 37.5 mm. Therefore, the range shown by the phantom lines in FIGS. Therefore, as described above, the inter-guide length L3 is set larger than the face passage width L4 and the foot passage width L5 (L3> L4, L5).

  As described above, in the present embodiment, the cold air guide 61 and the hot air guide 62 are provided inside the rotary door 41. Each guide 61, 62 guides cold air and hot air to the center of the rotary door 41, respectively. Therefore, the air that has flowed into the rotary door 41 from the cold air inflow portion 18 and the hot air inflow portion 21 can collide with the center of the rotary door 41. As a result, cold air and hot air are mixed in the center of the rotary door 41. When the rotary door 41 rotates, the rotary door 41 is provided with a plurality of openings 51 to 53, so that the relative positions of the positions of the openings 51 to 53 and the plurality of outlet passages 31 to 33 change. The plurality of blowing passages 31 to 33 are opened and closed. Therefore, the rotary door 41 functions as a so-called mode door. As described above, since the cold air and the warm air are mixed inside the rotary door 41, the air passing through the rotary door 41 and flowing into the blowout passages 31 to 33 can be mixed air. As a result, it is possible to realize a rotary door 41 that is excellent in mixing cold air and warm air and functions as a mode door.

  In the present embodiment, the cold air guide 61 and the hot air guide 62 rotate integrally with the rotary door 41. As a result, the number of man-hours and the number of assembling steps can be reduced as compared with the configuration of separate bodies.

  Further, in the present embodiment, in the foot mode, the foot differential mode, and the bi-level mode, the first opening 51 opens the cold air inflow portion 18, and the second opening 52 opens the hot air inflow portion 21. is there. Further, the cold air guide 61 is in a position for guiding the cold air to the center of the rotary door 41, and the hot air guide 62 is in a position for guiding the hot air to the center of the rotary door 41. Therefore, in the foot mode, the foot differential mode, and the bi-level mode, the cold air and the hot air can collide with each other at the center of the rotary door 41. Thus, in these blowing modes, the temperature difference between the upper and lower sides can be reduced and brought close to the set temperature.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. The present embodiment is characterized by the shape of the cold air guide 61A. As shown in FIG. 10, the cold air guide 61 </ b> A of the present embodiment has a bent portion 71 where the end portion on the center side of the rotary door 41 is bent.

  The bent portion 71 is a tip portion that is bent and extended. As shown in FIG. 11, the bent portion 71 is in a position for guiding the warm air guided by the warm air guide 62 to the defroster outlet passage 31 in the defroster mode. The bent portion 71 can prevent the warm air from being guided downward by the cold air guide 61A. As a result, pressure loss can be reduced in the differential mode.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  In the first embodiment described above, the rotary door 41 is provided with the three openings 51 to 53. However, the number of openings is not limited to three, and may be at least two or more openings. That is, one opening may be an opening for opening and closing the outlet passage, and the other opening may be an opening for opening and closing the inflow portion.

  In the first embodiment described above, the length relationship between the guides 61 and 62 is L1 = L2, L3> L4, and L3> L5, but is not limited to L1 = L2, and L1> L2 or L2 > L1 may be sufficient. For example, if L1> L2 while maintaining the relationship of L3> L4 and L3> L5, the vertical temperature difference (cooling and warming air agitation) achieves the same operation and effect as in the first embodiment. In this case, the pressure loss in the face mode increases, but the pressure loss in the foot mode can be reduced. Further, for example, if L2> L1 while maintaining the relationship of L3> L4 and L3> L5, the vertical temperature difference (cooling / heating air agitation) achieves the same operation and effect as in the first embodiment. In this case, the pressure loss in the foot mode increases, but the pressure loss in the face mode can be reduced. Therefore, it is preferable to appropriately determine the relationship between the guide lengths in consideration of pressure loss including the foot mode and face mode ducts.

  In the first embodiment described above, the cold air guide 61 and the hot air guide 62 are configured integrally with the rotary door 41, but are not limited to an integrated type. For example, the guides 61 and 62 and the rotary door 41 may be independent from each other. In this case, since the arrangement of the guides 61 and 62 does not rotate with the rotation of the mode door, the amount of reduction in the vertical temperature difference can be made constant regardless of the position of the rotary door 41.

DESCRIPTION OF SYMBOLS 10 ... Vehicle air conditioner 11 ... Air conditioning case 12 ... Air passage 13 ... Evaporator 15 ... Heater core 17 ... Cold air passage 18 ... Cold air inflow part 19 ... Mixing space 20 ... Hot air passage 21 ... Hot air inflow part 31 ... Defroster blow-out passage ( Air outlet passage)
32 ... Face outlet passage (outlet passage) 33 ... Foot outlet passage (outlet passage)
41 ... Rotary door 42 ... Door plate (arc-shaped plate)
51 ... 1st opening part (opening part) 52 ... 2nd opening part (opening part)
53 ... Third opening (opening) 61 ... Cold air guide 62 ... Hot air guide 71 ... Bending portion

Claims (6)

A vehicle air conditioner that blows out air for air conditioning from a plurality of air outlets that open into the vehicle interior,
An air conditioning case (11) forming an air passage (12) therein;
A rotary door (41) having a plurality of openings (51-53) provided in the arcuate wall (42), the arcuate member supported in the air conditioning case so as to be angularly displaceable; ,
A plurality of outlet passages arranged side by side in the circumferential direction on the outer side of the rotary door, which are opened and closed by displacement of the opening due to angular displacement of the rotary door, and are connected to the outlets, respectively. Blowout passages (31-33);
A cold air inflow portion disposed outside the rotary door, which communicates with the inside of the rotary door by displacement of the opening due to angular displacement of the rotary door, and in the open state in which the air is communicated, A cold air inlet (18) flowing toward the inside of the door;
A hot air inflow portion disposed outside the rotary door, which communicates with the inside of the rotary door by displacement of the opening due to angular displacement of the rotary door, and in the open state in which the communication is in the open state, A hot air inflow portion (21) flowing toward the inside of the rotary door;
A cold air guide (61) provided inside the rotary door, for guiding the cold air from the cold air inflow portion to the center of the rotary door;
An air conditioner for vehicles, comprising: a hot air guide (62) provided inside the rotary door for guiding the hot air from the hot air inflow portion to the center of the rotary door.   The vehicle air conditioner according to claim 1, wherein the cold air guide and the hot air guide rotate integrally with the rotary door. The plurality of blowing passages are
A defroster outlet passage (31) connected to a defroster outlet that is provided in the air conditioning case and blows air for air conditioning toward the inner surface of the vehicle front window glass;
A face outlet passage (32) provided in the air conditioning case and connected to a face outlet for blowing air for air conditioning toward the occupant's head and chest;
A foot outlet passage (33) provided in the air conditioning case and connected to a foot outlet for blowing air for air conditioning toward the feet of the occupant,
The plurality of openings include a first opening (51), a second opening (52), and a third opening (53),
The cold air inflow portion and the defroster outlet passage are opened and closed by displacement of the first opening due to angular displacement of the rotary door,
The warm air inflow portion opens and closes due to the displacement of the second opening due to the angular displacement of the rotary door,
The face outlet passage and the foot outlet passage are opened and closed by displacement of the third opening due to angular displacement of the rotary door,
The rotary door is
In the foot mode in which only the foot outlet passage is opened, the third opening portion opens the foot outlet passage, and the arcuate wall portion closes the face outlet passage and the defroster outlet passage. In the position to be in a state,
In the foot defroster mode in which the foot blowing passage and the defroster blowing passage are opened, the first opening opens the defroster blowing passage, and the third opening opens the foot blowing passage. The arcuate wall is in a position to close the face outlet passage,
In the bi-level mode in which the face outlet passage and the foot outlet passage are opened, the third opening portion opens the face outlet passage and the foot outlet passage, and the arcuate wall portion is In the position to close the defroster outlet passage,
In the face mode in which only the face outlet passage is opened, the third opening portion opens the face outlet passage, and the arcuate wall portion closes the foot outlet passage and the defroster outlet passage. In the position to
In the defroster mode in which only the defroster outlet passage is opened, the first opening portion opens the defroster outlet passage, and the arcuate wall portion closes the foot outlet passage and the face outlet passage. In the position to be in a state,
In the foot mode, the foot defroster mode, and the bi-level mode, the first opening portion opens the cold air inflow portion, the second opening portion opens the hot air inflow portion, and the cold air The guide is in a position to guide the cold air to the center of the rotary door, the hot air guide is in a position to guide the hot air to the center of the rotary door,
In the face mode, the first opening portion opens the cold air inflow portion, the arc-shaped wall portion closes the hot air inflow portion, and the cold air guide opens the cold air in the face state. It is in a position to guide to the outlet passage,
In the defroster mode, the arc-shaped wall portion closes the cold air inflow portion, the second opening portion opens the hot air inflow portion, and the hot air guide opens the hot air. The vehicle air conditioner according to claim 2, wherein the vehicle air conditioner is in a position to be guided to the defroster outlet passage. The cold air guide and the hot air guide extend in a radial direction of the rotary door,
The cold air guide and the hot air guide on the center side end of the rotary door are spaced apart,
The vehicle air conditioner according to claim 2 or 3, wherein the cold air guide and the hot air guide have the same length.   The space between the cold air guide and the hot air guide is larger than a passage width in the circumferential direction of the face blowing passage and a passage width in the circumferential direction of the foot blowing passage. Vehicle air conditioner. The cold air guide has a bent end (71) on the center side of the rotary door,
The bent and extended tip portion is in a position for guiding the warm air guided by the warm air guide to the defroster outlet passage in the defroster mode. The vehicle air conditioner according to claim 1.

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