JP5962499B2 - In-vehicle air conditioner - Google Patents

Description

  The present invention relates to an in-vehicle air conditioner.

  As a conventional technique, an in-vehicle air conditioner disclosed in Patent Document 1 is known. In the in-vehicle air conditioner, the inside air or outside air sucked by a single fan is blown to the evaporator and the heater core, and is supplied into the vehicle through the DEF door, the FACE door, the FOOT door, and the like.

JP 2010-89590 A

  In the in-vehicle air conditioner disclosed in Patent Document 1, the blowing mode is set, and the positions of the DEF door, the FACE door, the FOOT door, and the like are set according to the blowing mode. For example, when the blowing mode is the DEF blowing mode, the FOOT door located at the lower part of the air conditioner is set at the fully closed position, and the DEF door located at the upper part of the air conditioner is set at the fully opened position. In such a state, since ventilation at the lower part of the air conditioner is restricted, ventilation is concentrated on the upper part of the evaporator. Therefore, there is a concern that the ventilation at the lower part of the evaporator becomes insufficient and the performance of the evaporator is not sufficiently exhibited.

  This invention is made | formed in view of said problem, and it aims at providing the vehicle-mounted air conditioner which can equalize the ventilation to an evaporator irrespective of blowing mode.

To achieve the above object, the in-vehicle air conditioner according to the present invention, to form inner and outer air chamber (33) therein with outside air switching unit (34) for switching between the air outside of the air and the cabin and outside A case (30, 31, 60) having an air box (32) and forming a passage (54, 56, 44, 64, 46, 66) through which air passes, and a case (30, 31, 60) And a single fan (11) that sucks air through the inside / outside air chamber (33) and sends it out to the passages (54, 56, 44, 64, 46, 66), and a case (30, 31, 60). The evaporator (50) that is housed and located downstream of the fan (11) with respect to the air flow direction and the case (30, 31, 60) and that is downstream of the evaporator (50) with respect to the air flow direction A heater core (52) positioned at In the vehicle air conditioner, the case (30, 31, 60) includes a first partition plate (62) and a second partition plate (41, 61) inside, and the first partition plate (62) has a passage ( 54, 56, 44, 64, 46, 66), the passages (54, 56) extending from the evaporator (50) to the heater core (52) are arranged in the axial direction of the fan (11) with a plurality of first passages (54 56), and the first partition plate (62) is separated from at least one of the evaporator (50) and the heater core (52), and communicates with the plurality of first passages (54, 56). 80), and the second partition plate (41, 61) is a passage (44, 64) extending from the fan (11) to the evaporator (50) among the passages (54, 56, 44, 64, 46, 66). 46, 66), fan In the axial direction of 11), partitioned into a plurality of second passages (44,64,46,66),
The plurality of second passages (44, 64, 46, 66) are constituted by two second passages (44, 64, 46, 66) partitioned by a single second partition plate (41, 61), The second partition (41, 61) has a second end (69) located on the fan (11) side, and the second end (69) is the center of the fan (11) with respect to the axial direction. (C2) It is located below the vertical direction .

  According to this invention, the air flowing in from the inside / outside air chamber can be supplied to the evaporator along the plurality of second passages divided by the second partition plate. For example, when the second passage is divided into a second upper passage and a second lower passage in the vehicle vertical direction, the air is guided to the upper part of the evaporator by the second upper passage, and the evaporator is made by the second lower passage. You can guide to the bottom.

  With such a configuration, for example, even if the blowing mode of the in-vehicle air conditioner is set to the DEF blowing mode, and the downstream flow resistance increases with respect to the vehicle vertical direction downstream of the evaporator, the second partition plate In the upstream, the air flowing through the second lower passage and the air flowing through the second upper passage are isolated to prevent mutual movement. Therefore, it is possible to avoid a situation in which the air flowing through the second lower passage upstream of the evaporator moves directly upward to the second upper passage and drifts in the upper portion.

  Here, by restricting the movement of air up and down by the second partition plate, in the state where the pressure of the air flowing through the second lower passage is higher than the pressure of the air flowing through the second upper passage, It is assumed to pass through. Even in such a situation, downstream of the evaporator, air moves upward through the communication path to balance the pressure difference between the upper and lower sides. With such a configuration, since the bias of the flow resistance downstream of the evaporator does not greatly affect the upstream of the evaporator, air can be supplied almost evenly to the upper and lower parts of the evaporator. That is, it is possible to provide an in-vehicle air conditioner that substantially uniformly blows air to the evaporator regardless of the blowing mode. Thereby, the drift which generate | occur | produces between the upper part and the lower part of an evaporator can be reduced, and the performance of an evaporator can be exhibited effectively. In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a fragmentary sectional view which shows the structure of the vehicle-mounted air conditioner which concerns on 1st Embodiment. It is a top view which shows the vehicle-mounted air conditioner which concerns on 1st Embodiment. It is the schematic which shows the conditioned air which passes the evaporator of the vehicle-mounted air conditioner which concerns on 1st Embodiment. It is explanatory drawing which shows the FACE blowing mode of the vehicle-mounted air conditioner which concerns on 1st Embodiment. It is explanatory drawing which shows B / L blowing mode of the vehicle-mounted air conditioner which concerns on 1st Embodiment. It is explanatory drawing which shows the FOOT blowing mode of the vehicle-mounted air conditioner which concerns on 1st Embodiment. It is explanatory drawing which shows the FOOTDEF blowing mode of the vehicle-mounted air conditioner which concerns on 1st Embodiment. It is explanatory drawing which shows the DEF blowing mode of the vehicle-mounted air conditioner which concerns on 1st Embodiment. It is explanatory drawing which shows the FOOT blowing mode of the vehicle-mounted air conditioner which concerns on a comparative example. It is explanatory drawing which shows the DEF blowing mode of the vehicle-mounted air conditioner which concerns on a comparative example. It is explanatory drawing which shows the up-down position of the 2nd partition plate of the vehicle-mounted air conditioner which concerns on 1st Embodiment. It is a perspective view which shows the duct member of the vehicle-mounted air conditioner which concerns on 2nd Embodiment. It is a perspective view which shows the connection duct of the vehicle-mounted air conditioner which concerns on 2nd Embodiment.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly show that combinations are possible in each embodiment, but also combinations of the embodiments even if they are not clearly specified, unless there is a problem with the combination. Is also possible.

(First embodiment)
Based on FIGS. 1-8, the vehicle-mounted air conditioner 1 of 1st Embodiment is demonstrated. As shown in FIG. 1, the in-vehicle air conditioner 1 of this embodiment includes a blower unit 100 and an air conditioner unit 200.

  The blower unit 100 includes a fan 11, a motor 13, and a filter 15, and these are housed in a blower case 30. The blower case 30 is provided with an inside / outside air box 32 at the top, and the inside / outside air box 32 forms an inside / outside air chamber 33 inside. In the inside / outside air box 32, an inside / outside air switching door (inside / outside air switching unit) 34 for switching between the inside air inlet 36 and the outside air inlet 38 is rotatably installed. The filter 15 removes foreign substances from the inhaled air. The fan 11 is driven by a motor 13 and blows the inside and outside air that has passed through the filter 15. The fan 11 is a sirocco fan (single fan) having wings extending uniformly along the axial direction X. The blower case 30 is made of resin and is formed integrally with the connection duct 31.

  The blower case 30 and the connection duct 31 have a partition plate 41 inside. The partition plate 41 is located downstream of the fan 11 with respect to the flow direction of the inside and outside air. The partition plate 41 divides the inside of the blower case 30 and the connection duct 31 into an upper passage 44 located in the upper portion and a lower passage 46 located in the lower portion. In the present embodiment, the partition plate 41 is integrally formed as a rib-shaped member on the blower case 30 and the connection duct 31.

  The air conditioner unit 200 is connected to the downstream side of the connection duct 31. The air conditioner unit 200 includes an evaporator 50, a heater core 52, and various doors, and these are housed in a resin air conditioner case 60. The air conditioner case 60 also includes partition plates 61 and 62 upstream and downstream of the evaporator 50, respectively. In the present embodiment, the partition plates 61 and 62 are integrally formed with the air conditioner case 60. The partition plate 61 is located upstream of the evaporator 50 and is continuously connected to the partition plate 41 of the connection duct 31 in the flow direction. The partition plate 61 is divided into an upper passage 64 located on the upper side and a lower passage 66 located on the lower side with respect to the axial direction of the fan 11.

  The air conditioner case 60 further forms passages 229, 230, 222, and 220. The passage 229 is located below the heater core 52 and bypasses the heater core 52. The passage 230 is located downstream of the heater core 52 and is located between the passage 229 and the FOOT opening 94. The passage 222 is located between the passage 230 and the FACE opening 92. The passage 220 is located between the passage 222 and the FACE opening 92 and the DEF opening 90.

  The upper passage 64 of the air conditioner case 60 communicates with the upper passage 44 of the connection duct 31 to constitute a second upper passage. The lower passage 66 of the air conditioner case 60 communicates with the lower passage 46 of the connection duct 31 to constitute a second lower passage. The partition plate 41 formed in the blower case 30 and the connection duct 31 and the partition plate 61 of the air conditioner case 60 located upstream of the evaporator 50 constitute a second partition plate.

  With this configuration, the inside and outside air blown by the fan 11 passes through the upper passage 44 located above the blower case 30 and the connection duct 31 and the upper passage 64 located above the air conditioner case 60 from the vehicle front side to the vehicle rear side. It circulates continuously toward the side. Similarly, the inside and outside air blown by the fan 11 passes through the lower passage 46 located below the blower case 30 and the connection duct 31 and the lower passage 66 located below the air conditioner case 60 from the vehicle front side to the vehicle rear side. It circulates continuously toward.

  The evaporator 50 is disposed perpendicular to the flow direction so as to cross the entire area of the upper passage 64 and the lower passage 66. The evaporator 50 is a cooling heat exchanger that absorbs the latent heat of evaporation of the refrigerant in the refrigeration cycle from the conditioned air and cools the conditioned air. The evaporator 50 is formed by laminating tubes made of aluminum alloy or the like via fins and brazing them integrally.

  The temperature sensor 210 is installed downstream of the evaporator 50 and detects the temperature of the conditioned air that has passed through the evaporator 50. In this example, the temperature sensor 210 is located below the evaporator 50. The temperature sensor 210 is connected to a control device (not shown). The control device compares the temperature detected by the temperature sensor 210 with a predetermined temperature and performs ON / OFF control of a compressor (not shown) in the refrigeration cycle.

  The air mix doors 72 and 74 are disposed downstream of the evaporator 50 (vehicle rear side). Each of the air mix doors 72 and 74 is a horizontally long plate-like member, and has a dimension equivalent to the dimension of the air conditioner case 60 in the left-right direction of the vehicle. A link mechanism and a servo motor (not shown) are connected to the side ends of the air mix doors 72 and 74 in the vehicle left-right direction. The air mix doors 72 and 74 are rotatable between a minimum heating position indicated by a solid line and blocking the upstream of the heater core 52 and a maximum heating position opening the upstream of the heater core 52. The air mix doors 72 and 74 are operated to an intermediate heating position that is indicated by a dotted line and is located between the minimum heating position and the maximum heating position, so that the conditioned air downstream of the evaporator 50 is supplied to the heater core 52, the passage 220, and the passage. Split to 229.

  The partition plate 62 of the air conditioner case 60 is located downstream of the evaporator 50 and constitutes a first partition plate. In the present embodiment, the partition plate 62 is integrally formed with the air conditioner case 60. The partition plate 62 includes a passage extending from the evaporator 50 to the heater core 52 in an axial direction of the fan 11, an upper passage 54 (first upper passage) located at the upper portion of the vehicle and a lower passage (first lower passage) located at the vehicle lower side. ) 56. The partition plate 62 has an evaporator-side end portion 63 positioned on the evaporator 50 side. The evaporator-side end portion 63 and the evaporator 50 are separated from each other, and a communication passage 80 that communicates the downstream side of the evaporator 50 in the vertical direction is formed. During the operation of the in-vehicle air conditioner 1, the flow resistance at the upper part or the lower part of the air conditioner case 60 increases depending on the blowout mode described later. In such a case, the communication path 80 guides the conditioned air downstream of the evaporator 50 to the one with the smaller flow resistance.

  The heater core 52 is located on the downstream side (the vehicle rear side) of the air mix doors 72 and 74. The width dimension of the heater core 52 in the left-right direction of the vehicle is smaller than the dimension of the evaporator 50 in the left-right direction of the vehicle. The heater core 52 is formed by laminating tubes made of aluminum alloy or the like via fins and integrally brazing them. A flow path through which high-temperature engine coolant flows is formed in the tube of the heater core 52, and the cold air that has passed through the evaporator 50 is reheated using the engine coolant as a heat source.

  The air conditioner case 60 has a DEF opening 90, a FACE opening 92, and a FOOT opening 94 on the downstream side of the passage. The DEF opening 90 is located at the top of the air conditioner case 60 and opens in the center in the vehicle front-rear direction. A DEF duct 202 is connected to the DEF opening 90, and conditioned air is blown out from the tip of the DEF duct 202 toward the inner surface of the vehicle window glass. The DEF opening 90 is opened and closed by a DEF door 76. The DEF door 76 has a plate shape and can be rotated about a rotation axis.

  The FACE opening 92 opens at the rear side of the vehicle from the DEF opening 90 in the upper part of the air conditioner case 60. A FACE duct 204 is connected to the FACE opening 92, and air is blown out from the front end of the FACE duct 204 toward the passenger's head in the passenger compartment. The FACE opening 92 is opened and closed by a FACE door 77. The FACE door 77 has a plate shape and can be rotated about a rotation axis.

  As shown in FIG. 1 and FIG. 2, the FACE door 77 is composed of a center door portion 77a located at the center in the rotational axis direction and side door portions 77b located at both ends in the rotational axis direction. Connected by shaft. Each side door portion 77b has an opening 77c. For this reason, even if the side door portion 77b is fully closed, the conditioned air flows into the side portion (not shown) of the FACE duct 204 through the opening 77c.

  The FOOT opening 94 opens to the vehicle rear side on the bottom surface of the air conditioner case 60. A FOOT duct 206 is connected to the FOOT opening 94, and air is blown out from the front end of the FOOT duct 206 located at the center and the left and right of the vehicle toward the feet of the passengers in the vehicle compartment. The FOOT opening 94 is opened and closed by a FOOT door 78. The FOOT door 78 includes a center door portion 78a located at the center in the rotation axis direction and side door portions 78b located at both ends in the rotation axis direction, and these door portions are connected by a single rotation shaft.

The rotation axis of the DEF door 76, the rotation axis of the FACE door 77, and the rotation axis of the FOOT door 78 are connected to a servo motor through a link mechanism (not shown), and a fully closed position indicated by a dotted line and a fully open position indicated by a solid line. Driven between.
Next, the operation of the present embodiment in the above configuration will be described for each blowing mode.

[FACE blowing mode]
In the FACE blowing mode shown in FIG. 4, the DEF opening 90 is fully closed by the DEF door 76, the FOOT opening 94 is also fully closed by the FOOT door 78, and the FACE opening 92 is fully opened by the FACE door 77. . In this FACE blowing mode example, the air mix doors 72 and 74 are operated to positions upstream of the heater core 52 to fully close the upper and lower portions of the heater core 52.

  In this state, about 50% of the inside and outside air passes through the upper passage 44 of the connection duct 31 and the upper passage 64 of the air conditioner case 60 and is guided to the upper portion of the evaporator 50. Further, the remaining 50% of the conditioned air passes through the lower passage 46 of the connection duct 31 and the lower passage 66 of the air conditioner case 60 and is guided to the lower portion of the evaporator 50.

  The inside and outside air that has flowed into the upper and lower portions of the evaporator 50 in this way is cooled and becomes cold air by absorbing the latent heat of vaporization of the refrigerant from the inside and outside air. The cool air passes through the passage 220 after passing through the upper portion of the evaporator 50, passes through the passages 229, 230, and 222 after passing through the lower portion of the evaporator 50, and flows to the FACE opening 92. Thereby, the cold air is blown out through the FACE opening 92 to the upper body side of the passenger in the passenger compartment, thereby cooling the passenger compartment. In the FACE mode, almost 100% of the conditioned air is blown out from the FACE opening 92.

[B / L blowing mode]
In the B / L blowing mode (bilevel blowing mode) shown in FIG. 5, the DEF opening 90 is fully closed by the DEF door 76, the FOOT opening 94 is in a large opening state by the FOOT door 78, and the FACE opening 92 is also The FACE door 77 is in a large opening state. In the example of the B / L mode, the air mix doors 72 and 74 are operated to an intermediate position, and both the upper and lower sides of the heater core 52 are opened. In this state, the conditioned air passes through the upper part of the evaporator 50, bypasses the heater core 52, passes through the passages 54 and 220, and travels toward the FACE opening 92. The conditioned air passes through the upper part of the evaporator 50 and then flows into the upper part of the heater core 52 through the passage 54, is heated by exchanging heat with hot water and becomes warm air, and travels toward the FACE opening 92. The conditioned air passes through the lower part of the evaporator 50 and then flows into the lower part of the heater core 52 through the passage 56, and is heated by exchanging heat with hot water to become hot air and travels toward the FOOT opening 94. The conditioned air passes through the lower part of the evaporator 50, bypasses the heater core 52, passes through the passage 229, and travels toward the FOOT opening 94. In this way, the conditioned air toward the FACE opening 92 is blown out upward in the passenger compartment, and the conditioned air toward the FOOT opening 94 is blown out to the passenger's feet. In the B / L blowing mode, about 50% of the conditioned air is distributed to the FOOT opening 94 and the remaining about 50% is distributed to the FACE opening 92.

[FOOT blowing mode]
In the FOOT blowing mode shown in FIG. 6, the FACE opening 92 is fully closed by the FACE door 77, the FOOT opening 94 is fully opened by the FOOT door 78, and the DEF opening 90 is in a small opening state by the DEF door 76. . In the example of the FOOT blowing mode, the heating state is maximum, and the air mix doors 72 and 74 are operated to a position where the upstream side of the heater core 52 is opened. In this state, the conditioned air passes through the upper part of the evaporator 50 and then flows into the upper part of the heater core 52 through the passage 54. After passing through the lower part of the evaporator 50, the conditioned air flows into the lower part of the heater core 52 through the passage 56. It is heated by heat exchange and becomes warm air.

  The warm air that has passed through the upper part of the evaporator 50 and the upper part of the heater core 52 passes through the passages 222 and 220 and blows out from the DEF opening 90 toward the inner surface of the vehicle window glass, thereby preventing the window glass from fogging. Further, the warm air passes through the passage 222 to the FACE opening 92, and flows into an unillustrated side portion of the FACE duct 204 (FIG. 1) through the opening 77c (FIG. 2) of the side door portion 77b. The warm air that has passed through the lower part of the evaporator 50 and the lower part of the heater core 52 passes through the passage 230 and blows out through the FOOT opening 94 to the occupant feet on the driver side and the passenger seat side to heat the occupant feet.

  In the FOOT blowing mode, most of the conditioned air is directed to the FOOT opening 94 located at the lower part of the air conditioner case 60. On the other hand, since the FACE door 77 is set to be fully closed and the DEF door 76 is set to a small opening, the flow rate of the conditioned air toward the FACE opening 92 and the DEF opening 90 located at the upper part of the air conditioner case 60 is limited. Is done. In the FOOT blowing mode, for example, approximately 70 to 80% of the conditioned air is distributed to the FOOT opening 94, and the remaining 20 to 30% is distributed to the DEF opening 90 and the FACE opening 92. Therefore, the flow resistance of the conditioned air toward the FOOT opening 94 is smaller than the flow resistance of the conditioned air toward the DEF opening 90 and the FACE opening 92. Therefore, a part of the conditioned air that has passed through the upper portion of the evaporator 50 passes through the communication passage 80 toward the passage 230 as indicated by an arrow.

  In this example, approximately 50% of the inside and outside air is guided to the upper part of the evaporator 50 through the upper passages 44 and 64 upstream of the evaporator 50. Further, the remaining 50% of the conditioned air is guided to the lower part of the evaporator 50 through the lower passages 46 and 66. Thereafter, about 20% of the conditioned air that has passed through the upper portion of the evaporator 50 passes through the communication passage 80 downward and toward the passage 56. As a result, about 70% of the conditioned air passes through the passage 56 located at the lower portion of the air conditioner case 60, and the remaining about 30% of the conditioned air passes through the passages 54 and 222 located at the upper portion of the air conditioner case 60. In the FOOT blowing mode, downstream of the evaporator 50, the flow resistance increases in the upper part of the air conditioner case 60, and the flow resistance decreases in the lower part. For this reason, the flow resistance is biased up and down in the air conditioner case 60 downstream of the evaporator 50. However, even in such a state, the flow of air is distributed by the conditioned air moving downward in the communication path 80 downstream of the evaporator 50.

  That is, even if the distribution resistance is biased downstream of the evaporator 50 and the back pressure of the conditioned air is biased up and down accordingly, the communication passage 80 is formed so that the circulation of the conditioned air is distributed up and down downstream of the evaporator 50. Is done. As a result, the influence of the bias of the distribution resistance downstream of the evaporator 50 does not greatly affect the upstream of the evaporator 50, so that the air circulates at a substantially uniform ratio in the vertical direction upstream of the evaporator 50.

[FOOTDEF blowing mode]
7, the FACE opening 92 is fully closed by the FACE door 77, the FOOT opening 94 is fully opened by the FOOT door 78, and the DEF opening 90 is fully opened by the DEF door 76. In the FOOTDEF blowing mode, the amount of blowing air from the DEF opening 90 is increased as compared with the FOOT blowing mode.

  In the example of the FOOTDEF blowing mode, the maximum heating state is set, and the air mix doors 72 and 74 are operated to a position where the upstream side of the heater core 52 is opened. In this state, the conditioned air passes through the upper portion of the evaporator 50 and then flows into the upper portion of the heater core 52 through the passage 54. After passing through the lower portion of the evaporator 50, the conditioned air flows into the lower portion of the heater core 52 through the passage 56. It exchanges and is heated and becomes warm air. The flow direction of the warm air is similar to the FOOT blowing mode, and detailed description thereof is omitted.

  In the FOOTF DEF mode, approximately 50% of the conditioned air is distributed to the FOOT opening 94 and the remaining approximately 50% is distributed to the DEF opening 90 and the FACE opening 92. Therefore, the flow resistance of the conditioned air toward the FOOT opening 94 is not significantly different from the flow resistance of the conditioned air toward the DEF opening 90 and the FACE opening 92. Therefore, the conditioned air that has passed through the upper part of the evaporator 50 passes to the passages 222 and 220 formed in the upper part of the air conditioner case, and the conditioned air that has passed through the lower part of the evaporator 50 passes to the passage 230 formed in the lower part of the air conditioner case. Divide each.

[DEF blowing mode]
In the DEF blowing mode shown in FIG. 8, the FACE opening 92 is fully closed by the FACE door 77, the FOOT opening 94 is also fully closed by the FOOT door 78, and the DEF opening 90 is fully opened by the DEF door 76. In this example of the DEF blowing mode, the maximum heating state is set, and the air mix doors 72 and 74 are operated to a position where the upstream side of the heater core 52 is opened.

  In this state, the conditioned air passes through the upper part of the evaporator 50 and then flows into the upper part of the heater core 52 through the passage 54 and is heated by exchanging heat with the hot water to become hot air. 90, and partly toward the FACE opening 92. The conditioned air passes through the lower part of the evaporator 50 and then flows into the lower part of the heater core 52 through the passage 56 and is heated by exchanging heat with the hot water to become hot air, passes through the passages 230, 222, 220 and passes through the DEF opening 90. Toward the FACE opening 92. The warm air toward the FACE opening 92 flows into a side portion (not shown) of the FACE duct 204 (FIG. 1) through the opening 77c (FIG. 2) of the side door portion 77b. In the DEF blowing mode, most of the conditioned air passes through the DEF opening 90 and blows out toward the inner surface of the vehicle window glass to prevent fogging of the window glass.

  On the other hand, since the FOOT door 78 is fully closed, the flow rate of the conditioned air passing through the lower side of the air conditioner case 60 is limited. Therefore, the flow resistance of the conditioned air passing through the passage 56 located in the vicinity of the FOOT opening 94 is compared with the flow resistance of the conditioned air passing through the passage 54 located in the vicinity of the DEF opening 90 and the FACE opening 92. Become bigger. Therefore, a part of the conditioned air that has passed through the lower part of the evaporator 50 passes through the communication passage 80 toward the passage 54 as shown by the arrow.

  In this example, about 20% of the conditioned air that has passed through the lower portion of the evaporator 50 passes through the communication passage 80 upward and toward the passage 54. As a result, about 70% of the conditioned air passes through the passage 54 located at the upper part of the air conditioner case 60, and the remaining about 30% of the conditioned air passes through the passage 56 located at the lower part of the air conditioner case 60. In other words, even if the distribution resistance is increased in the lower part of the air conditioner case 60 and the distribution resistance is reduced in the upper part, the air conditioner air is caused to flow through the communication path 80 downstream of the evaporator 50 even if the distribution resistance is biased up and down in the air conditioner case 60. The distribution of conditioned air is distributed by moving upward.

  With such a configuration, for the same reason as in the FOOT blowing mode, the distribution resistance deviation downstream of the evaporator 50 does not greatly affect the upstream of the evaporator 50. Accordingly, inside and outside air circulates at a substantially uniform rate in the upper and lower sides upstream of the evaporator 50.

  Next, a comparative example shown in FIGS. 9 and 10 will be described. In this comparative example, the blower case 30, the connection duct 31, and the air conditioner case 60 do not include the partition plates 41, 61, and 62, and each form a single air conditioning channel. As described above, the flow resistance of the passage formed inside the air conditioner case 60 differs depending on the blowing mode, and the conditioned air flows through different paths. Note that the comparative example shown in FIGS. 9 and 10 is an example for explaining the function and effect of the present embodiment, and is not a conventional technique.

  For example, in the comparative example of the FOOT blowing mode shown in FIG. 9, the FOOT door 78 is set to fully open, and the air mix doors 72 and 74 are operated to a position where the upstream side of the heater core 52 is opened. In this state, the flow resistance of the flow path below the air conditioner case 60 is reduced. As a result, the flow rate of the inside and outside air increases in the lower part of the air conditioner case 60. Therefore, upstream of the evaporator 80, the flow rates of the lower passages 46 and 66 are higher than the flow rates of the upper passages 44 and 64. Therefore, the pressure in the lower passages 46 and 66 is lower than the pressure in the upper passages 44 and 64. In this comparative example, the partition plates 41 and 61 described above are not provided upstream of the evaporator 80. Therefore, upstream of the evaporator 80, the air flowing through the upper passages 44 and 64 moves directly downward to the lower passages 46 and 66.

  For this reason, as indicated by the bold arrows, most of the conditioned air, for example, about 70% circulates in the lower part of the air conditioner case 60. On the other hand, since the FACE door 77 is set to be fully closed and the DEF door 76 is set to a small opening, the flow resistance in the upper part of the air conditioner case 60 is increased. Therefore, as indicated by the dotted line arrow, the circulation amount of the conditioned air passing through the upper part of the air conditioner case 60 is small, for example, the remaining about 30%.

  In this way, in the comparative example, the flow of conditioned air is concentrated in the lower part of the evaporator 50 having a small flow resistance, and the conditioned air does not sufficiently flow through the upper part of the evaporator 50. For this reason, in the upper part of the evaporator 50, heat exchange with the conditioned air is not effectively performed, the heat exchange performance is lowered, and there is a concern that the dehumidified moisture is frozen. Further, when the temperature drop occurs only in the upper part of the evaporator 50 and the temperature sensor 210 detects the temperature near the lower part of the evaporator 50, the detected value of the temperature sensor 210 is the temperature of the upper part of the evaporator 50. Get higher. When the above-described control device controls the compressor based on such a detected value, there is a concern that the temperature of the refrigerant is further lowered, the upper part of the evaporator 50 is further cooled and freezing is promoted.

  Further, for example, in the comparative example of the DEF blowing mode shown in FIG. 10, since the DEF door 76 is set to fully open, the upper flow resistance in the air conditioner case 60 is reduced. Therefore, as indicated by the thick arrow, most of the conditioned air, for example, about 70% circulates in the upper part of the air conditioner case 60. On the other hand, since the FOOT door 78 is set to be fully closed, the flow resistance in the lower part of the air conditioner case 60 increases. Even in this comparative example, the above-described partition plates 41 and 61 are not provided upstream of the evaporator 80. Therefore, the air flowing through the lower passages 46 and 66 upstream of the evaporator 80 directly moves upward to the upper passages 44 and 64. Therefore, as indicated by the dotted line arrow, the flow rate of the conditioned air passing through the lower portion of the air conditioner case 60 is small, for example, the remaining about 30%.

  That is, in this comparative example, the flow of the conditioned air is concentrated on the upper portion of the evaporator 50 having a small flow resistance, and the conditioned air does not sufficiently flow through the lower portion of the evaporator 50. In addition, the flow rate of the conditioned air around the temperature sensor 210 is reduced. In this case as well, the temperature detected by the temperature sensor 210 deviates from the temperature above the evaporator 50, and the temperature is not correctly detected. In this case, since the heat exchange with the conditioned air is not effectively performed in the lower part of the evaporator 50, there is a concern that the dehumidified moisture is frozen.

  On the other hand, in this embodiment, the air blower case 30, the connection duct 31, and the air conditioner case 60 that constitute the case of the in-vehicle air conditioner 1 include a second partition plate inside. The second partition plate is configured by a partition plate 41 formed in the blower case 30 and the connection duct 31, and a partition plate 61 of the air conditioner case 60 located upstream of the evaporator 50.

  The second partition plate divides a passage extending from the fan 11 to the evaporator 50 into a second upper passage and a second lower passage in the axial direction of the fan 11. The second upper passage is constituted by the upper passage 44 of the connection duct 31 and the upper passage 64 of the air conditioner case 60, and the second lower passage is constituted by the lower passage 46 of the connection duct 31 and the lower passage 66 of the air conditioner case 60.

  With such a configuration, in the different blowing modes described with reference to FIGS. 4 to 10, even when the flow resistance in the air conditioner case 60 is different between the upper part and the lower part, the second partition plate is located upstream of the evaporator 80. , The internal and external air flowing through the lower passages 46 and 66 and the internal and external air flowing through the upper passages 44 and 64 are isolated to prevent mutual movement. Therefore, in the upstream of the evaporator 80, the internal and external air flowing through the lower passages 46 and 66 and the internal and external air flowing through the upper passages 44 and 64 are prevented from drifting upstream of the evaporator 80 due to direct movement in the vertical direction. it can.

  In the present embodiment, the first partition plate 62 divides a passage extending from the evaporator 50 to the heater core 52 into a first upper passage 54 and a first lower passage 56 in the axial direction of the fan 11. With this configuration, drift in the upper and lower portions of the heater can be reduced, and the performance of the heater can be effectively exhibited.

  In the present embodiment, the first partition plate 62 forms a communication passage 80 that is separated from at least one of the evaporator 50 and the heater core 52 and communicates between the upper passage 54 and the lower passage 56. Specifically, in this embodiment, the first partition plate 62 has an evaporator-side end portion 63 positioned on the evaporator 50 side, and a communication path 80 is formed between the evaporator 50 and the evaporator-side end portion 63. The communication passage 80 communicates the first upper passage 54 and the first lower passage 56 downstream of the evaporator 50. In this configuration, the conditioned air that has passed through the evaporator 50 can move between the first upper passage 54 and the first lower passage 56.

  As described above, by restricting the movement of the inside and outside air up and down by the second partition plate, a pressure difference is generated between the inside and outside air flowing through the lower passages 46 and 66 and the inside and outside air flowing through the upper passages 44 and 64. In this state, it is assumed that the upper part and the lower part of the evaporator 50 are respectively passed. Even in such a situation, downstream of the evaporator 50, the conditioned air moves up and down through the communication passage 80 to balance the pressure difference. With such a configuration, since the bias of the flow resistance downstream of the evaporator 50 does not greatly affect the upstream of the evaporator 50, the conditioned air can be distributed almost evenly to the upper and lower portions of the evaporator 50. Thereby, the drift in the upper part and the lower part of the evaporator 50 can be reduced, and the performance of the evaporator 50 can be exhibited effectively.

  Further, even if the distribution resistance is biased inside the air conditioner case 60 in accordance with the blowing mode, the conditioned air can be circulated through the communication path 80 to the passage having a small distribution resistance downstream of the evaporator 50. For this reason, the flow path in the air-conditioner case 60 can be used effectively.

  In the present embodiment, the case of the in-vehicle air conditioner 1 includes a connection duct 31 that forms a passage from the fan 11 to the evaporator 50, and at least a part of the second partition plate is formed inside the connection duct 31. Formed by ribs. In this configuration, since the connection duct 31 and the rib can be integrally formed by injection molding of resin, productivity can be improved.

  In the above, the vertical position of the second partition plate constituted by the partition plate 41 formed in the blower case 30 and the connection duct 31 and the partition plate 61 of the air conditioner case 60 located upstream of the evaporator 50 is particularly defined. Although not defined, the vertical position of the second partition plate may be defined as follows.

  That is, as shown in FIG. 11, the second partition plate has an evaporator-side end portion 68 located on the evaporator 50 side. Further, the evaporator-side end portion 68 may be positioned on the lower side in the vertical direction (lower side in the vehicle vertical direction) than the center C1 of the evaporator 50 with respect to the axial direction (vehicle vertical direction) of the fan 11. Specifically, the evaporator-side end portion 68 may be positioned on the lower side in the vertical direction from the center C1 of the core portion of the evaporator 50.

  Alternatively, the second partition plate has a fan-side end portion 69 located on the fan 11 side, and the fan-side end portion 69 is perpendicular to the axial direction (vehicle vertical direction) of the fan 11 from the center C2 of the fan 11. The structure located in the lower side (vehicle vertical direction lower side) may be sufficient. Specifically, the fan side end portion 69 may be configured to be positioned vertically below the center C2 of the blade portion of the fan 11.

  Further, both the evaporator-side end 68 and the fan-side end 69 of the second partition plate may be located vertically below the center of the fan 11 with respect to the axial direction of the fan 11. In such a configuration, there is an advantage that the cooling performance on the FACE side located in the upper part of the air conditioner case 60 can be improved.

(Second Embodiment)
An in-vehicle air conditioner 1 according to a second embodiment will be described with reference to FIGS. 12 and 13. In the second embodiment, the configuration of the connection duct 310 is different from the connection duct 31 of the first embodiment, and the connection duct 310 is separate from the blower case 30. As shown in FIG. 12, the connection duct 310 includes a cylindrical duct member (first duct member) 311 and a duct member (second duct member) 312.

  As shown in FIG. 13, the duct member 311 and the duct member 312 form a partition plate 410 by being joined in the axial direction (the vehicle vertical direction) of the fan 11 using welding or a fastening member. The partition plate 410 is configured as at least a part of the above-described second partition plate. The connection duct 310 thus configured is connected to the blower case 30 by welding or a fastening member.

  Since the connection duct 31 of the first embodiment has the upper passage 44 and the lower passage 46 formed therein, it may be difficult to integrally mold the connection duct 31 by injecting resin into a mold. . On the other hand, in the configuration of the second embodiment, since the connection duct 310 is divided into two members, the first duct member 311 and the second duct member 312, the first duct member 311 and the second duct portion are separately resinized. Can be formed as a single piece and can be easily released from the mold.

(Other embodiments)
The preferred embodiments of the present invention have been described above. However, 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 1st Embodiment, although the connection duct 31 was integrally molded by the air blower case 30, it is not restricted to this structure. The connection duct 31 may be formed separately from the blower case 30. In this case, the connection duct 31 may be integrally formed with the air conditioner case 60.

  In the above embodiment, the case of the in-vehicle air conditioner 1 includes one evaporator-side partition plate, and the passage extending from the fan 11 to the evaporator 50 is partitioned into two second passages in the axial direction of the fan 11. It is not limited to the configuration. The case of the in-vehicle air conditioner 1 may include two or more second partition plates in the axial direction of the fan 11. In this case, the second partition plate divides the passage extending from the fan 11 to the evaporator 50 into three or more second passages in the axial direction of the fan 11. In this configuration, the evaporator 50 is divided into three or more segments, and conditioned air is guided to each of them. Therefore, since the conditioned air can be distributed to the entire heat exchanging portion of the evaporator 50, the heat exchange efficiency of the evaporator 50 can be increased.

  In the above embodiment, the case of the in-vehicle air conditioner 1 includes one first partition plate 62, and the passage extending from the evaporator 50 to the heater core 52 is divided into two first passages in the axial direction of the fan 11. The configuration is not limited to this. The case of the in-vehicle air conditioner 1 may include two or more first partition plates 62 in the axial direction of the fan 11. In this case, the first partition plate 62 divides a passage extending from the evaporator 50 to the heater core 52 into three or more first passages in the axial direction of the fan 11. In this configuration, the heater is divided into three or more segments, and conditioned air is guided to each. Therefore, since the conditioned air can be distributed to the entire heat exchanging portion of the heater, the heat exchanging efficiency of the heater can be increased.

  In the said embodiment, although the 1st partition plate 62 has the evaporator side edge part 63 located in the evaporator 50 side, and formed the communicating path 80 between the evaporator 50 and the evaporator side edge part 63, it is not restricted to this structure. . The first partition plate 62 may have a first end located on the heater 52 side, and a communication path may be formed between the first end and the heater 52. That is, the first partition plate 62 may be separated from the heater 52 and form a communication path between the first partition plate 62 and the heater 52.

  As described above, the upper passage 44 formed by the blower case 30 and the connection duct and the upper passage 54 formed by the air conditioner case 60 constitute a second upper passage, and the lower portion formed by the blower case 30 and the connection duct. A lower passage 56 formed by the passage 46 and the air conditioner case 60 constitutes a second lower passage. Here, the air flow rate of the inside / outside air may be adjusted by forming a depression or a bulge in at least one of the wall surfaces forming the second upper passage and the second lower passage in the horizontal direction or the vertical direction of the vehicle. .

  For example, when the flow rate of the conditioned air in the second upper passage is larger than the flow rate of the conditioned air in the second lower passage upstream of the evaporator 50, the second upper passage is formed with a depression to restrict the flow path. The amount of conditioned air flowing through the upper passage and the second lower passage can be made uniform. Alternatively, when the flow rate of the conditioned air in the second upper passage is less than the flow rate of the conditioned air in the second lower passage upstream of the evaporator 50, the second upper passage forms a bulge to expand the flow path. 2 The flow rate of the conditioned air in the upper passage and the second lower passage can be made uniform. This configuration is particularly effective in the configuration including the second partition plate as in the above-described embodiment, and the vertical drift in the evaporator 50 can be further reduced.

DESCRIPTION OF SYMBOLS 11 ... Fan, 30 ... Blower case, 31 ... Connection duct 60 ... Air-conditioner case, 50 ... Evaporator, 52 ... Heater core 41 ... Partition plate (2nd partition plate), 61 ... Partition plate (2nd partition plate)
62 ... partition plate (first partition plate), 44 ... upper passage (second upper passage)
54 ... upper passage (second upper passage), 46 ... lower passage (second lower passage)
56 ... lower passage (second lower passage), 54 ... upper passage (first upper passage)
56 ... Lower passage (first lower passage)

Claims (5)

A passage (including an inside / outside air box (32) that includes an inside / outside air switching unit (34) that switches between outside air and inside air inside the vehicle , and that forms an inside / outside air chamber (33) therein, through which air passes ( 54, 56, 44, 64, 46, 66) (30, 31, 60),
A single fan (11) accommodated in the case (30, 31, 60), sucking air through the inside / outside air chamber (33) and sending it out to the passage (54, 56, 44, 64, 46, 66) When,
An evaporator (50) housed in the case (30, 31, 60) and positioned downstream of the fan (11) with respect to the air flow direction;
A heater core (52) housed in the case (30, 31, 60) and positioned downstream of the evaporator (50) with respect to the air flow direction;
An in-vehicle air conditioner comprising:
The case (30, 31, 60) includes a first partition plate (62) and a second partition plate (41, 61) inside,
The first partition plate (62) includes, among the passages (54, 56, 44, 64, 46, 66), passages (54, 56) extending from the evaporator (50) to the heater core (52). A plurality of first passages (54, 56) are partitioned in the axial direction of the fan (11),
The first partition plate (62) is spaced apart from at least one of the evaporator (50) and the heater core (52), and has a communication passage (80) communicating the plurality of first passages (54, 56) with each other. Forming,
The second partition plate (41, 61) includes the passage (44, 64, 64) extending from the fan (11) to the evaporator (50) among the passages (54, 56, 44, 64, 46, 66). 46, 66) is divided into a plurality of second passages (44, 64, 46, 66) in the axial direction of the fan (11) ,
The plurality of second passages (44, 64, 46, 66) includes two second passages (44, 64, 46, 66) partitioned by a single second partition plate (41, 61). And
The second partition plate (41, 61) has a second end (69) located on the fan (11) side,
The on-vehicle air conditioner characterized in that the second end (69) is located vertically below the center (C2) of the fan (11) with respect to the axial direction . Before Stories second partition plate (41, 61) has an evaporator-side end portion (68) located in the evaporator (50) side,
The evaporator side end portion (68), with respect to the axial direction, the in-vehicle air conditioning apparatus according to claim 1, characterized in that located vertically lower than the center (C1) of the evaporator (50). The first partition plate (62) has an evaporator side end (63) located on the evaporator (50) side,
The in-vehicle air conditioner according to claim 1 or 2, wherein the communication path (80) is formed between the evaporator (50) and the evaporator side end (63) . The case (30, 31, 60) includes a connection duct (31) that forms a passage from the fan (11) to the evaporator (50),
The at least part of the second partition plate (41, 61) is formed by a rib formed inside the connection duct (31). In-vehicle air conditioner. The case (30, 31, 60) includes a connection duct ( 310 ) that forms a passage from the fan (11) to the evaporator (50),
The connection duct (310) includes a cylindrical first duct member (311) and a second duct member (312), respectively.
At least a portion of the second partition plate (41, 61) is characterized by being formed by joining the first the duct member (311) second duct member (312) in the axial direction The in-vehicle air conditioner according to any one of claims 1 to 3 .

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