JP4346388B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner that selectively blows conditioned air to a plurality of locations in a vehicle compartment.

  2. Description of the Related Art Conventionally, for example, a vehicle air conditioner mounted on an automobile is air introduced into an air passage inside the casing from an air inlet of the casing containing a heat exchanger, as disclosed in Patent Document 1. Is conditioned air by the heat exchanger, then a defroster port for blowing the conditioned air toward the inner surface of the windshield, a vent port for blowing the conditioned air toward the face and chest of the occupant, and a foot port for blowing out toward the occupant's feet It is comprised so that it may blow out from at least one.

In the vehicle air conditioner, the cool air passage provided with the cooling heat exchanger and the hot air passage provided with the heating heat exchanger are communicated with the air mix space so that the air from both passages is communicated. Is mixed in the air mix space to generate conditioned air. In this air mix space, the upstream end of the first passage connected to the defroster port and the vent port communicates with a location away from the hot air passage, and the upstream end of the second passage connected to the foot port is the warm end. It is in close communication with the air passage. In this way, by bringing the upstream end of the second passage close to the hot air passage, the foot port can be used in the blowing mode in which conditioned air is blown out from the defroster port and the foot port, or in the blowing mode in which the conditioned air is blown out from the vent port and the foot port. The temperature of the conditioned air from the vehicle becomes relatively high, and it is possible to prevent the occupant from feeling cold under the feet and improve comfort.
Japanese Patent Laid-Open No. 11-2222021 (pages 3 to 5, FIG. 1)

  However, in the vehicle air conditioner of Patent Document 1, air is introduced into the air mix space from the cold air and hot air passages and mixed, so when the amount of air introduced into the casing is large, etc. The flow velocity of air from these two passages increases and may flow into the first passage and the second passage without being sufficiently mixed. In this case, the upstream end of the second passage is hot air. Because the air is close to the passage, a large amount of air flows from the hot air passage, while the upstream end of the first passage is away from the hot air passage, so a large amount of air flows from the cold air passage. The temperature of the conditioned air that blows out becomes relatively high, and the passenger feels uncomfortable.

  Also, in general, in an air conditioner for a vehicle, a conditioned air is blown out from a vent port to rapidly cool the passenger compartment, or a blow mode in which conditioned air is blown out from the defroster port in order to positively clear the fog on the windshield. There are blowout modes for blowing out, and in these blowout modes, a large amount of conditioned air is set. However, in the air conditioning apparatus of Patent Document 1, when the conditioned air is blown out from the defroster port or the vent port, the second passage is closed and the conditioned air flows only through the first passage. It is difficult to smoothly flow a large amount of conditioned air in the air mix space into the first passage, and there is a possibility that a sufficient amount of conditioned air from the defroster port or the vent port cannot be obtained.

  The present invention has been made in view of such a point, and an object of the present invention is to remove the conditioned air from the foot opening in the blowing mode in which at least one of the defroster opening and the vent opening and the foot opening. The air mix space is harmonized in a blowout mode that prevents the passenger from feeling uncomfortable by preventing the temperature of the conditioned air from becoming too high, and blowing the conditioned air from the defroster port or vent port. An object of the present invention is to provide a vehicular air conditioner that can sufficiently obtain a blowing amount by smoothly flowing air into a first passage.

In order to achieve the above object, according to the present invention, in the blowing mode in which conditioned air is blown from at least one of the defroster port and the vent port and the foot port, the air from the hot air passage is supplied to the cold air introduction side of the air mix space. In the blowing mode in which the air is blown from the defroster port or the vent port, a plate-like body for guiding the conditioned air in the air mix space to the first passage is provided.

Specifically, a casing in which an air introduction port and a plurality of air outlets including a defroster port, a vent port, and a foot port are formed is provided, and a cooling heat exchanger is disposed inside the casing. A cold air passage, a hot air passage provided with a heat exchanger for heating, an air mix space that introduces and mixes the cold air and the air from the hot air passage to generate conditioned air, and communicates with the air mix space The first passage connected to at least one of the defroster port and the vent port, and the first passage connected to the foot port connected to the side closer to the hot air passage than the first passage communication portion in the air mix space. an air passage communicating with the air inlet and air outlet and a second passage provided positioned so as to align the upstream end of the second passage and the upstream end of the first passage, the said air mixing space, Said first and 2 has a closure wall for closing the first or the second passage rotates in the direction in which the upstream end is arranged in the passage, the closed stopping the amount of conditioned air flowing from the air mixing space into first and second passages provided rotary door for switching the air outlet mode change by the wall portion, said rotary door, the plate-like body is provided integrally apart in the radial direction and the circumferential direction of the rotating shaft from the closed wall portion, wherein the plate When the conditioned air is in a blowing mode in which conditioned air flows to the first and second passages by the rotary door , the state body extends from the vicinity of the downstream end of the hot air passage toward the cold air introduction side of the air mix space, and the hot air while guiding the air flowing into the air mixing space from the passage to the cold air introduction side of the air mixing space, said when the conditioned air only to the first passage is the outlet mode flowing by rotary door is directed to the first passage What extend, and configure you guiding conditioned air to the first passage of the air mixing space.

  According to this configuration, when air is introduced from the air inlet into the air passage inside the casing, the air is cooled by the cooling heat exchanger in the cold air passage and becomes cold air, while the air is heated in the hot air passage. It is heated by a heat exchanger and becomes hot air. These cold air and warm air flow into the air mix space and are mixed to become conditioned air.

When cold air and hot air are mixed in the air mix space, air is blown out from the defroster port and the foot port by conditioned air flowing into the first and second passages, and air is blown out from the vent port and the foot port When the mode is set, the warm air from the warm air passage is guided to the cold air introduction side of the air mix space by the plate-like body , and the warm air and the cool air flowing into the air mix space are sufficiently mixed. Become. The conditioned air in the air mix space flows into the first and second passages. At this time, the second passage communicates with the side of the air mix space close to the warm air passage, so that the conditioned air flows into the second passage. The temperature of the air becomes higher than the temperature of the conditioned air flowing into the first passage. As a result, conditioned air at a relatively high temperature blows out from the foot opening, so that the occupant does not feel cold at the feet. In addition, the temperature difference between the conditioned air flowing into the first and second passages falls within an appropriate range because the cold air and the hot air are sufficiently mixed as described above. The temperature difference between the conditioned air blown out from the mouth and the temperature difference between the conditioned air blown out from the vent opening and the foot opening do not become too large.

On the other hand, when it is in the blowing mode in which conditioned air is blown out from the defroster port or the vent port, the conditioned air in the air mix space is guided to the first passage by the plate-like body , and the conditioned air smoothly flows into the first passage. .

Further , the amount of conditioned air flowing from the air mix space to the first and second passages is changed by rotating the rotary door. Further, the plate-like body moves corresponding to each blowing mode by the rotation of the rotary door, and air can be guided in each blowing mode by this plate-like body .

According to the first aspect of the present invention, the first passage connected to at least one of the defroster port and the vent port is communicated with the air mix space, and the second passage connected to the foot port is communicated with the first passage of the air mix space. The air from the warm air passage is brought into the cold air introduction side of the air mix space by the plate-like body when the blow mode in which conditioned air flows to the first and second passages is made to communicate with the side closer to the warm air passage than the location. Since the air is mixed in the air mix space, the difference between the temperature of the conditioned air blown from the defroster port and the vent port and the temperature of the conditioned air blown from the foot port is appropriately adjusted. The range can be set to prevent the passengers from feeling uncomfortable. And when it was set as the blowing mode in which conditioned air flows into the first passage, the conditioned air in the air mix space is guided to the first passage by the plate-like body . The air can smoothly flow into one passage, and the amount of conditioned air blown from the defroster port or the vent port can be sufficiently obtained.

Further , since the plate-like body is provided integrally with the rotary door, the plate-like body can be guided by moving the plate-like body according to each blowing mode without providing an actuator or a link mechanism. The cost increase of the air conditioner associated with the provision of the air conditioner can be suppressed, and the weight can be reduced.

Moreover, since so as to guide the air in the plate-like body, to be able to reliably guide the air while simplifying the structure, it can be reduced cost.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the embodiments, for convenience of explanation, “front” means the front side of the vehicle, “rear” means the rear side of the vehicle, and “left” means the left side of the vehicle. Furthermore, “right” represents the right side of the vehicle.

Embodiment 1 of the Invention
FIG. 1 shows a vehicular air conditioner 1 according to Embodiment 1 of the present invention, and this vehicular air conditioner 1 is arranged in an instrument panel of an automobile (not shown).

  The air conditioner 1 includes a casing 3 that is a combination of a resin-made left case component (not shown) and a right case component 2. A fan housing 7 that houses the blower fan 5 is formed integrally with the other part on the front side of the upper half of the casing 3. The air from the blower fan 5 flows downward on the front end side inside the casing 3, the evaporator 10 as a cooling heat exchanger housed in the lower half of the casing 3, and the heater core as a heating heat exchanger 11, the air is conditioned and then supplied to the vehicle compartment from a defroster port 12, a vent port 13 and a foot port 14 formed on the rear side of the casing 3.

  The fan housing 7 has a cylindrical shape having a center line extending in the left-right direction, and a sirocco fan constituting the blower fan 5 is accommodated in a central portion of the fan housing 7 with its rotating shaft directed in the left-right direction. ing. Around the blower fan 5 of the fan housing 7 is formed an air outflow passage 17 where the flow of air blown out from the blower fan 5 gathers, and the downstream end of the air outflow passage 17 opens at the lower side of the fan housing 7. is doing. An attachment port 18 for a motor (not shown) for driving the blower fan 5 is formed on the left side wall of the fan housing 7. The motor mounting port 18 is airtightly mounted with an output shaft extending in the left-right direction facing the inside of the fan housing 7. The blower fan 5 is integrally attached to the output shaft of the motor.

  A suction port 19 is formed in the right side wall of the fan housing 7, and an intake box (not shown) is connected to the suction port 19. The intake box is formed with an outside air introduction port for introducing air outside the vehicle compartment and an inside air introduction port for introducing air inside the vehicle compartment. The outside air introduction port and the inside air introduction port are opened and closed by an inside / outside air switching door disposed inside the intake box.

  A cold air passage 20 connected to the downstream end of the air outflow passage 17 and extending obliquely rearward toward the lower side is formed on the front end side of the lower half of the casing 3. The cold air passage 20 is a passage that cools the air from the blower fan 5 to produce cold air, and the evaporator 10 is disposed and accommodated in the cold air passage 20 so as to cross the cold air passage 20. The evaporator 10 performs a refrigerant evaporation process of a refrigeration cycle, is formed in a rectangular plate shape, and is arranged vertically so as to be along a substantially vertical direction. Although not shown, the evaporator 10 is a tube-and-fin type heat exchanger in which tubes and heat transfer fins are alternately arranged and integrated, and cooler piping is connected to both ends of the tube. Then, the gas refrigerant compressed by a compressor (not shown) is cooled to become a liquid refrigerant, and after the pressure of the liquid refrigerant is reduced by the pressure reducing mechanism, the liquid refrigerant flows into the evaporator 10 through the cooler pipe and is evaporated. The air is cooled. In the state in which the liquid refrigerant does not evaporate in the evaporator 10 and no latent heat of evaporation is generated, the air that has passed through the evaporator 10 is not cooled. In this embodiment, however, the air that has passed through the evaporator 10 is also cooled in this case. Use cold air.

  The cold air passage 20 on the downstream side of the evaporator 10 communicates with the upstream end of the hot air passage 21, and the hot air passage 21 is a passage that heats the cold air from the cold air passage 20 to generate hot air. A vertical wall 23 extending upward from the bottom wall of the casing 3 is formed between the upstream end of the hot air passage 21 and the cold air passage 20 so as to partition both the passages 21 and 20. A first opening 24 that forms an upstream end opening of the warm air passage 21 is formed in the upper half of the vertical wall 23. A second opening 25 is formed immediately above the first opening 24 so as to extend from the upper end of the vertical wall 23 to the vicinity of the upper end on the downstream side of the evaporator 10. A downstream end opening of the passage 20 is formed.

  A plate-like temperature control door 27 that selectively opens and closes the first opening 24 and the second opening 25 is disposed near the upper end of the vertical wall 23, and the temperature control door 27 extends in the left-right direction. It is supported on the casing 3 by a support shaft 27a. Although not shown, the temperature control door 27 is driven by an actuator. When the temperature control door 27 is rotated downward to fully open the second opening 25, the first opening 24 is fully closed. On the other hand, as shown in FIG. 4A, when the temperature adjustment door 27 is rotated upward to fully open the first opening 24, the second opening 25 is fully closed. Further, as shown in FIG. 4B, when the temperature control door 27 is rotated to an intermediate position between the first opening 24 and the second opening 25, the first opening 24 and the second opening 25. Both are opened, and the distribution amount of the cold air passing through both the openings 24 and 25 changes depending on the rotation angle of the temperature control door 27 at this time.

  In the vicinity of the vertical wall 23 of the hot air passage 21, the heater core 11 is disposed and accommodated in an inclined state that is located rearward as it goes upward and across the hot air passage 21. Although not shown, the heater core 11 is also a tube-and-fin type heat exchanger similar to the evaporator 10, and both ends of the tube are connected to the cooling water passage of the vehicle-mounted engine via the heater pipe, By flowing the raised cooling water through the heater core, the cold air from the cold air passage 20 passes through the heater core 11 and is heated. When high-temperature cooling water is not flowing through the tube of the heater core 11, the air that has passed through the heater core 11 is not cooled. In this embodiment, however, the air that has passed through the heater core 11 is also used as hot air. To do.

  An air mix space 29 in which the downstream end of the cold air passage 20 and the downstream end of the hot air passage 21 communicate with each other is formed above the second opening 25. In this air mix space 29, the cold air in the cold air passage 20 and the hot air in the hot air passage 21 are mixed to generate conditioned air. That is, the amount of cold air flowing into the air mix space 29 and the amount of hot air change according to the amount of cold air distributed to the first opening 24 and the second opening 25 depending on the rotation angle of the temperature control door 27, and the conditioned air. The temperature of is changing. Depending on the rotation angle of the temperature control door 27, only the cool air flows into the air mix space 29 and does not mix with the warm air, or only the warm air flows into the air mix space 29 and does not mix with the cool air. However, in this embodiment, these cases are also conditioned air.

  Further, a duct 30 extending substantially in the vertical direction is integrally formed with the other part on the rear side of the casing 3. The upper end portion of the duct 30 extends to substantially the same height as the upper end portion of the fan housing 7. The upper end portion of the duct 30 has a defroster port 12 formed on the front side and a vent port 13 formed close to the rear side. Yes. The defroster port 12 is connected to a defroster nozzle that opens near the lower end of the front window of the instrument panel via a defroster duct (not shown). Further, the instrument panel has a plurality of vent nozzles for blowing conditioned air toward the occupant's face and chest, and the vent port 13 of the casing 3 is connected to each through a vent duct (not shown). Connected to the vent nozzle. A foot opening 14 is formed at the lower end of the duct 30, and a foot duct (not shown) extending to the feet of the front seat occupant and the feet of the rear seat occupant is connected to the foot opening 14. Yes.

  In the upper half of the duct 30 is formed a first passage 31 whose upstream end communicates with the upper portion of the air mix space 29 and whose downstream end is connected to the defroster port 12 and the vent port 13. The upstream end opening of the first passage 31 is positioned so as to face the second opening 25. The lower half of the duct 30 is formed with a second passage 32 whose upstream end communicates with the rear portion of the air mix space 29 and whose downstream end is connected to the foot port 14. The upstream end opening of the second passage 32 is close to the downstream end opening of the warm air passage 21 and the upstream end opening of the first passage 31. The downstream end opening of the warm air passage 21 and the second passage 32 The upstream end opening and the upstream end opening of the first passage 31 are arranged side by side.

The air mix space 29 is provided with a mode switching door 35 that selectively opens and closes the upstream end opening of the first passage 31 and the upstream end opening of the second passage 32 and switches the conditioned air blowing mode. . The mode switching door 35 is a so-called rotary door, and as shown in FIGS. 2 and 3, a flat plate-like closed wall portion 36 that rotates in the direction in which the upstream end openings of the first passage 31 and the second passage 32 are aligned. And a triangular end wall portion 37 connected to both ends in the rotational axis direction of the closing wall portion 36, and a support shaft 38 is integrally formed on the end wall portion 37. Flange 39 is integrally formed at both edges in the rotational direction of the closing wall portion 36 and the end wall portion 37, and a foamed resin sealing material 40 is attached to both surfaces of the flange 39. . A plate-like extension 42 is integrally formed at the edge of the end wall 37 on one side in the rotational direction, and the extension 42 is connected to the ends of both the extensions 42. Thus, a long plate-like body 43 is attached in the direction of the rotation axis of the mode switching door 35. The plate-like body 43 is for guiding the air in the air mix space 29, and is curved when viewed in the rotational axis direction of the mode switching door 35. Although not shown, the longitudinal ends of the plate-shaped body 43, the provided extending portion 42 engaging claw to be engaged with engaging holes formed in the tip is formed, the plate member 43 is mode After being molded separately from the switching door 35, it is detachably attached to the mode switching door 35. The plate-like body 43 and the mode switching door 35 may be fixed by adhesion or the like.

  The mode switching door 35 is driven by an actuator (both not shown) via a link mechanism. As shown in FIG. 5B, the mode switching door 35 is rotated forward. When the upstream end opening of the second passage 32 is fully opened, the upstream end opening of the first passage 31 is slightly opened, and in this state, the sealing material 40 located on the rear side of the mode switching door 35 is Air leakage is prevented by abutting against a projecting wall 50 projecting from the upper side of the upstream end opening of the second passage 32 in the inner wall of the duct 30.

On the other hand, as shown in FIG. 1, when the mode switching door 35 is rotated rearward to fully open the upstream end opening of the first passage 31, the upstream end opening of the second passage 32 is fully closed. In this state, the sealing material 40 positioned on the upper side of the mode switching door 35 contacts the protruding wall 50, and the sealing material 40 positioned on the lower side of the mode switching door 35 is connected to the warm air passage 21. The conditioned air in the air mix space 29 is prevented from flowing into the second passage 32 by abutting against the partition wall 51 that partitions the second passage 32. In a state where the first passage 31 is fully opened by the mode switching door 35, the plate-like body 43 extends toward the first passage 31 in the air mix space 29 and guides conditioned air in the air mix space 29 to the first passage 31. It is designed to be positioned in the position to do.

Further, as shown in FIG. 4B, when the mode switching door 35 is rotated to an intermediate position between the position where the first passage 31 is fully opened and the position where the second passage 32 is fully opened, the first passage 31 and the 2nd channel | path 32 will be in the open state, and the distribution amount of the conditioned air to both the channel | paths 31 and 32 changes with the rotation angles of this mode switching door 35. FIG. In a state where the first passage 31 and the second passage 32 are opened by the mode switching door 35, the plate-like body 43 extends from the vicinity of the downstream end of the hot air passage 21 to the cold air introduction side of the air mix space 29. The warm air flowing into the air mix space 29 from the air mix space 29 is positioned to guide the air mix space 29 to the cold air passage 20 side.

In this embodiment, the plate-like body 43 is curved so that the air from the hot air passage 21 can be smoothly guided. However, depending on the positional relationship between the hot air passage 21 and the air mix space 29, The plate-like body 43 may be formed in a flat plate shape.

  Also, a defroster side opening 56 and a vent side opening 57 that are opened and closed by a defvent switching door 55 are formed on the downstream side of the first passage 31 below the defroster port 12 and below the vent port 13, respectively. Yes. The differential vent switching door 55 is supported on the casing 3 by a support shaft 55a which is formed in a plate shape and extends in the left-right direction, like the temperature control door 27. The differential vent switching door 55 is interlocked with the mode switching door 35 via a link mechanism, and is driven by a common actuator. As shown in FIG. 1, when the differential vent switching door 55 is rotated forward to fully close the defroster side opening 56, the vent side opening 57 is fully opened, while the differential vent switching door 55 is opened as shown in FIG. 4. Is rotated rearward to fully close the vent side opening 57, the defroster side opening 56 is fully opened.

  That is, in the vehicle air conditioner 1 of this embodiment, the air passage R is configured by the air outflow passage 17, the cold air passage 20, the hot air passage 21, the air mix space 29, the first passage 31, and the second passage 32. In addition, a suction port 19 of the fan housing 7 that constitutes an air introduction port, and a defroster port 12, a vent port 13, and a foot port 14 that constitute an air outlet communicate with the air passage R.

  Although not shown, the actuator of the temperature control door 27 and the actuators of the mode switching door 35 and the differential vent switching door 55 are controlled by the air conditioning control unit. The air-conditioning control unit is connected to an air-conditioning operation switch disposed in the passenger compartment, and each actuator is operated in accordance with the blowing mode selected by the passenger using the operation switch.

Next, a case where each conditioned air blowing mode is selected by the occupant will be described. FIG. 1 shows a case where a vent mode for supplying conditioned air only to a vent nozzle of an instrument panel is selected. In this vent mode, the mode switching door 35 rotates until the second passage 32 is fully closed, and the plate-like body 43 faces the direction in which the first passage 31 extends. The differential vent switching door 55 is rotated until the defroster side opening 56 is fully closed, and the temperature control door 27 is rotated until the first opening 24 is fully closed. Only cold air flows into the.

In this vent mode, the cold air that has flowed into the air mix space 29 from the cold air passage 20 is guided to the first passage 31 by the plate-like body 43. Specifically, the flow lines in the casing 3 in this mode are as shown in FIG. 6, and the plate-like body 43 allows the conditioned air to flow without hindering the flow of the conditioned air in the air mix space 29. It acts so that it may guide to the one channel | path 31, and the increase in ventilation resistance by positioning this plate-shaped body 43 in the air mix space 29 is very small. And the conditioned air which flowed into the 1st channel | path 31 blows off to a passenger | crew's face and chest from each vent nozzle via the vent port 13 and a vent duct.

FIG. 4A shows a case where the defroster mode in which conditioned air is supplied only to the defroster nozzle of the instrument panel is selected. In the defroster mode, the mode switching door 35 rotates until the second passage 32 is fully closed as in the vent mode, and the plate-like body 43 faces the direction in which the first passage 31 extends. The differential vent switching door 55 is rotated until the vent-side opening 57 is fully closed, and the temperature control door 27 is rotated until the second opening 25 is fully closed. Only warm air flows into.

Even in the defroster mode, the conditioned air in the air mix space 29 is guided to the first passage 31 by the plate-like body 24. The conditioned air flowing into the first passage 31 is blown out from the defroster nozzle to the inner surface of the front window via the defroster port 12 and the defroster duct.

FIG. 4B shows a case where the differential foot mode for supplying conditioned air to the defroster nozzle and the foot duct of the instrument panel is selected. In the differential foot mode, the mode switching door 35 is rotated to a position where the first passage 31 and the second passage 32 are opened approximately half by half, and the plate-like body 43 is air mixed from the vicinity of the downstream end of the hot air passage 21. It extends to the cold air introduction side of the space 29. Further, the differential vent switching door 55 is rotated until the vent side opening 57 is fully closed, and the temperature control door 27 is rotated to an intermediate position between the first opening 24 and the second opening 25.

In this differential foot mode, a part of the cool air from the cool air passage 20 flows into the hot air passage 21 and becomes warm air, and the warm air in the hot air passage 21 and the remaining cool air in the cool air passage 20 are air-mixed. It flows into the space 29. The warm air flowing into the air mix space 29 from the warm air passage 21 is guided to the cold air introduction side of the air mix space 29 by the plate-like body 43. Specifically, the streamlines in the casing 3 in this mode are as shown in FIG. 7 (a). Compared with the comparative example in which the plate-like body 43 shown in FIG. Flows so as to collide with the flow of the cold air in the air mix space 29 from the side, so that the cold air and the hot air are sufficiently mixed.

  Part of the conditioned air in the air mix space 29 generated in this way flows into the first passage 31 and blows out from the defroster nozzle toward the inner surface of the front window via the defroster port 12 and the defroster duct. Furthermore, the remainder of the conditioned air in the air mix space 29 flows into the second passage 32 and blows out from the foot duct to the occupant's feet via the foot opening 14. At this time, since the upstream end of the second passage 32 is close to the downstream end of the warm air passage 21, the conditioned air having a slightly higher temperature than the conditioned air flowing into the first passage 31 is provided in the second passage 32. Will flow in and passengers will not feel cold under their feet.

  Further, as described above, since the cold air and the warm air are sufficiently mixed in the air mix space 29, the temperature of the conditioned air flowing into the first passage 31 does not become too low, and the front window inner surface is effectively clouded. Can be cleared.

FIG. 5A shows a case where the bi-level mode for supplying conditioned air to the vent nozzle and the foot duct of the instrument panel is selected. In this bi-level mode, the mode switching door 35 is rotated to a position where the first passage 31 and the second passage 32 are opened approximately half by half as in the differential foot mode, and the plate-like body 43 is in the warm air passage. 21 extends from the vicinity of the downstream end to the cold air introduction side of the air mix space 29. The differential vent switching door 55 is rotated until the defroster side opening 56 is fully closed, and the temperature control door 27 is rotated to an intermediate position between the first opening 24 and the second opening 25.

  In this bi-level mode, similarly to the differential foot mode, cold air and warm air are sufficiently mixed in the air mix space 29 to become conditioned air, and part of the conditioned air in the air mix space 29 is the first passage. 31 flows into the occupant's face and chest through the vent port 13 and the vent duct, and the remaining conditioned air in the air mix space 29 blows out to the occupant's feet. At this time, since the temperature of the conditioned air flowing into the second passage 32 is relatively high, the occupant does not feel cold at his feet.

That is, as described above, the plate-like body 43 is configured separately from the casing 3 so as to be movable, so that in the vent mode or the defroster mode, the passage of the passage from the upstream side of the air mix space 29 to the first passage 31 is performed. In the case where the cross-sectional area is ensured and the bi-level mode or the differential foot mode is used, the air-mixing property is good. That is, in the case of the vent mode or the defroster mode as compared with the structure in which the plate-like body is integrally provided in the casing 3 so as to extend the downstream end of the hot air passage 31 in order to improve the air mix performance. The plate-like body does not serve as a flow resistance, and a sufficient air volume can be obtained and noise reduction can be achieved.

  Further, in the case of the differential foot mode shown in FIG. 4B and the bi-level mode shown in FIG. 5A, the gap between the closing wall portion 36 of the mode switching door 35 and the protruding wall 50 of the casing 3 is A gap 60 for communicating the two passages 32 and the air mix space 29 is formed. The relatively high temperature conditioned air that has flowed into the second passage 32 flows back into the air mix space 29 through the gap 60, and the conditioned air that has flowed back flows into the first passage 31. That is, the temperature difference of the conditioned air flowing through the first passage 31 and the second passage 32 can be set depending on the size of the gap 60.

FIG. 5B shows a case where a heat mode is selected in which most of the conditioned air is supplied to the foot duct and the remaining amount is supplied to the defroster nozzle of the instrument panel. In this heat mode, the mode switching door 35 rotates until the closing wall portion 36 covers most of the upstream end opening of the first passage 31, and the plate-like body 43 is closer to the second passage 32 than the partition wall 51. Has moved to. The differential vent switching door 55 is rotated until the vent side opening 57 is fully closed, and the temperature control door 27 is rotated until the second opening 25 is fully closed. Only warm air flows into 29.

  Then, most of the conditioned air in the air mix space 29 is blown out from the foot duct to the occupant's feet through the foot opening 14, and a small amount is blown out from the defroster nozzle 12 to the inner surface of the front window through the defroster duct 12.

Therefore, in the vehicle air conditioner 1 according to this embodiment, the first passage 31 connected to the defroster port 12 and the vent port 13 communicates with the upper portion of the air mix space 29 and is connected to the foot port 14. the second passage 32 communicates at a position close to the warm air passage 21 communicating portion in the air mixing space 29, the warm air that has flowed into the air mixing space 29 when the differential foot mode and the bi-level mode from the warm air passage 21, the plate Since the air 43 is guided to the side where the cold air flows into the air mix space 29 by the state body 43, the cold air and the hot air are sufficiently mixed in the air mix space 29, and the conditioned air blown out from the defroster port 12 or the vent port 13 And the temperature of the conditioned air blown out from the foot port 14 are within an appropriate range, and the passenger can be prevented from feeling uncomfortable. When the vent mode and the defroster mode, since so as to guide the conditioned air of the air mix space 29 into the first passage 31 by the plate-like body 43 by moving the plate-like body 43, a large amount of conditioned air The air can smoothly flow into the first passage 31, and a sufficient amount of conditioned air can be obtained from the defroster port 12 and the vent port 13. In addition, since the conditioned air from the air mix space 29 smoothly flows into the first passage 31, it is possible to reduce the noise during the operation of the air conditioner 1 and improve the quietness of the passenger compartment. be able to.

Further, since the configuration of the guide hand stage of a plate-like member 43, to be able to reliably guide the air of the air mix space 29 while simplifying the structure of the plate-like body 43, it is possible to reduce the cost of the plate 43 . Further, since the plate-like body 43 is provided integrally with the mode switching door 35, the plate-like body 43 can be accurately moved according to each blowing mode by an actuator or a link mechanism of the mode switching door 35. This eliminates the need for an actuator, a link mechanism, or the like for moving the plate-like body 43, can suppress an increase in cost of the air-conditioning apparatus 1 due to the provision of the plate-like body 43, and reduces the weight of the air-conditioning apparatus 1. Can be achieved.

Furthermore, since the plate-like body 43 is detachably attached to the mode switching door 35, the mode switching door 35 can be shared with an air conditioner that does not require the plate-like body 43.

  In addition, in the said embodiment, although the closing wall part 36 of the mode switching door 35 was formed in flat form, it does not restrict to this, For example, it forms in circular arc surface shape like the modification 1 shown in FIGS. 8-10. May be. The mode switching door 35 of this modification 1 has a shape that is roughly divided into a half along the axis along the axis, and in the differential foot mode shown in FIG. Since no gap is formed with respect to 50, the conditioned air in the second passage 32 does not flow back into the air mix space 29.

  Further, the shape of the blocking wall portion 36 of the mode switching door 35 may be formed so as to form a step as in the second modification shown in FIG. In the second modification, the rotation angle of the mode switching door 35 is different between the case of the bi-level mode shown in FIG. 11A and the case of the differential foot mode shown in FIG. When shifting from the level mode to the differential foot mode, the mode switching door 35 is slightly rotated forward. The stepped shape of the closed wall 36 is such that no gap is formed between the projecting wall 50 in the bi-level mode and a gap 60 is formed between the projecting wall 50 and the differential foot mode. Is set to be. For this reason, the conditioned air in the second passage 32 does not flow back to the air mix space 29 in the bi-level mode, while the conditioned air in the second passage 32 flows back to the air mix space 29 in the differential foot mode. Thus, it is possible to flow into the first passage 31. That is, the temperature difference of the conditioned air flowing through the first passage 31 and the second passage 32 can be changed according to the blowing mode.

  In the second modification, a defroster door 62 that opens and closes the defroster side opening 56 and a vent door 63 that opens and closes the vent side opening 57 are provided instead of the differential vent switching door. The defroster door 62 and the vent door 63 are of a so-called butterfly type, supported by the casing 3 by support shafts 62a and 63a extending in the left-right direction, and interlocked via a link mechanism (not shown). When the defroster door 62 fully opens the defroster side opening 56, the vent door 63 fully closes the vent side opening 57, while when the defroster door 62 fully closes the defroster side opening 56, the vent door 63 vents. The side opening 57 is fully opened.

<< Embodiment 2 of the Invention >>
FIG. 12 shows a vehicle air conditioner 1 according to Embodiment 2 of the present invention. Hereinafter, the same parts as those in Embodiment 1 are denoted by the same reference numerals, and different parts will be described in detail. That is, in Embodiment 2, the blower fan (not shown) is housed in a casing (not shown) separate from the casing 70 that houses the evaporator 10 and the heater core 11, and both the casings 70 are ducts (not shown). ) Is connected through. An air introduction port 71 connected to the casing of the blower fan is formed on the right side wall of the casing 70 in front of the evaporator 10. The air inlet 71 communicates with the upstream end of the cold air passage 20. Further, in the vehicle air conditioner 1 of the second embodiment, the defroster door 62 and the vent door 63 are provided instead of the differential vent switching door, as in the second modification of the first embodiment.

  Also in this embodiment, as in the first embodiment, the temperature of the conditioned air blown from the defroster port 12 and the vent port 13 and the temperature of the conditioned air blown from the foot port 14 in the differential foot mode and the bi-level mode Therefore, the passenger can be prevented from feeling uncomfortable, and a sufficient amount of conditioned air can be obtained in the vent mode or the defroster mode.

In the first and second embodiments, the plate-like body 43 is detachably attached to the mode switching door 35. However, the plate-like body 43 and the mode switching door 35 may be integrally formed. When the plate-like body 43 and the mode switching door 35 are separated, the plate-like body 43 may be moved using an actuator or the like different from the mode switching door 35.

  In each of the above embodiments, the temperature control door 27, the mode switching door 35, and the differential vent switching door 55 are automatically operated by an actuator. However, the present invention is not limited to this, and each door 27, 35, 55 is operated by an operation wire. You may comprise so that it may operate manually. That is, an operation lever is disposed on the air conditioning operation panel of the passenger compartment, and the operation lever and the link mechanism of each door 27, 35, 55 are connected by an operation wire. Thereby, each door 27, 35, and 55 operate | moves in response to a motion of a passenger | crew's operation lever.

  As described above, the vehicle air conditioner according to the present invention is suitable, for example, as an automobile air conditioner.

It is a longitudinal cross-sectional view in case the vehicle air conditioning apparatus which concerns on Embodiment 1 of this invention exists in vent mode. It is the perspective view which looked at the mode switch door and the plate-shaped object from the outside of a closed wall part. It is the perspective view which looked at the mode switching door and the plate-shaped body which abbreviate | omitted the sealing material from the inner side of the closed wall part. 1A is a diagram corresponding to FIG. 1 when in the defroster mode, and FIG. 1B is a diagram corresponding to FIG. 1 when in the differential foot mode. FIG. 1A is a diagram corresponding to FIG. 1 when in the bi-level mode, and FIG. 1B is a diagram corresponding to FIG. 1 when in the heat mode. It is explanatory drawing which shows schematically the streamline inside a casing in the case of being in vent mode. (A) is a diagram 6 corresponds diagram showing an example of the present invention when it is in differential foot mode, (b) Figure 6 corresponds diagram showing a comparative example not provided with the case and sheet-like bodies in differential foot mode It is. FIG. 3 is a diagram corresponding to FIG. 2 according to a first modification of the first embodiment. FIG. 6 is a diagram corresponding to FIG. 3 according to a first modification of the first embodiment. FIG. 10 is a diagram corresponding to FIG. 1 in the case of the differential foot mode according to the first modification of the first embodiment. FIG. 4 is a diagram corresponding to FIG. 1 when in the bi-level mode, and (b) is a diagram corresponding to FIG. 1 when in the differential foot mode, according to the second modification of the first embodiment. FIG. 6 is a view corresponding to FIG. 1 in a vent mode according to the second embodiment of the present invention.

3 Casing 10 Evaporator (Cooling heat exchanger)
11 Heater core (heat exchanger for heating)
12 Defroster port 13 Vent port 14 Foot port 19 Suction port 20 Cold air passage 21 Hot air passage 29 Air mix space 31 First passage 32 Second passage 35 Mode switching door 43 Plate body R Air passage

Claims (1)

A casing having an air inlet and a plurality of air outlets including a defroster port, a vent port and a foot port;
Inside the casing, a cold air passage provided with a cooling heat exchanger, a hot air passage provided with a heating heat exchanger, and the cold air and air from the hot air passage are introduced and mixed. An air mix space that generates conditioned air; a first passage that communicates with the air mix space and is connected to at least one of the defroster port and the vent port; and warm air that is warmer than the first passage communication portion in the air mix space An air passage that communicates with the air inlet and the air outlet, and has an upstream end connected to the upstream end of the first passage and the second passage. Is positioned to line up with the upstream end of
The air mix space has a closing wall portion that rotates in a direction in which the upstream ends of the first and second passages are arranged to close the first or second passage, and the first and second passages from the air mix space A rotary door that changes the amount of conditioned air flowing to the two passages by the closed wall and switches the blowing mode is provided;
The rotary door is integrally provided with a plate-like body separated from the closing wall portion in the radial direction and the circumferential direction of the rotation shaft,
When the plate-like body is in a blowing mode in which conditioned air flows to the first and second passages by the rotary door , the plate-like body extends from the vicinity of the downstream end of the hot air passage toward the cold air introduction side of the air mix space, When the air that has flowed into the air mix space from the warm air passage is guided to the cold air introduction side of the air mix space, while the conditioned air is set to the blowout mode in which the conditioned air flows only to the first passage by the rotary door, the air flows to the first passage. towards extending, vehicle air conditioning apparatus characterized by guiding the conditioned air to the first passage of the air mixing space.

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