Vehicular air conditioner

Abstract

To provide a vehicular air conditioner that can suppress variation in amounts of air which is blown out from a side vent blowout port when switching a blowout mode.SOLUTION: A vehicular air conditioner (1) comprises a housing (20a) in which blown air flows into an inner space and a mode door (30) that adjusts amounts of the air that is blown out from a plurality of blowout openings. The mode door comprises a door first control opening (41), a door second control opening (42) which is different from the door first control opening, and a door ventilation allowing part (43) that allows conditioned air to flow out through a side vent control outflow port (23a) in a defroster blowout mode. The door ventilation allowing part is provided so as to get closer to a door rotation center line (Ax) than an outer peripheral surface of the mode door.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a vehicle air conditioner capable of blowing air into a vehicle compartment. [Background technology]

[0002] Many vehicles are equipped with a vehicle air conditioner to appropriately adjust the temperature inside the vehicle cabin. The vehicle air conditioner disclosed in Patent Document 1 has a blower that draws in air outside or inside the vehicle cabin and blows it downstream, and a temperature conditioner that adjusts the temperature of the air blown from the blower and blows it into the vehicle cabin. The temperature conditioner has a housing through which air passes in an internal space, a cooling heat exchanger that can cool the blown air, a heating heat exchanger that can heat the blown air, a mix door that adjusts the ratio of air passing through the heating heat exchanger and air that bypasses the heating heat exchanger, and a mode door that supplies the temperature-conditioned air into the vehicle cabin from a predetermined blowing opening among a plurality of blowing openings formed in the housing.

[0003] The housing has a vent opening for blowing air toward the upper body of the occupant, a foot opening for blowing air toward the feet of the occupant, and a defroster opening for blowing air toward the windshield. The vent openings are further divided into a center vent opening for blowing air toward the center of the passenger compartment, and a side vent opening for blowing air toward the sides of the passenger compartment.

[0004] The mode door is a rotary door that rotates around a rotation axis, and allows air to be blown out by overlapping a communication port provided on the door closing surface located on the outer periphery of the semi-cylindrical shape with an air outlet opening in the housing.

[0005] The side vent outlet is always capable of blowing out conditioned air regardless of the outlet mode in order to ensure the clarity of the windows on the side of the vehicle interior and the thermal comfort of the occupants. The mode door disclosed in Patent Document 1 is provided with a communication port (first side vent communication port) that communicates with the side vent outlet in the vent outlet mode and the bi-level outlet mode, and a communication port (second side vent communication port) that is different from the first side vent outlet and communicates with the side vent outlet in the foot outlet mode, the defroster foot outlet mode, and the defroster outlet mode. Therefore, air can be blown out from the side vent outlet regardless of the outlet mode selected.

[0006] Here, the area of ​​the second side vent communication port of the mode door disclosed in Patent Document 1 that overlaps with the side vent outlet formed in the housing changes when the outlet mode is changed to the foot outlet mode, the defroster foot outlet mode, and the defroster outlet mode. Specifically, the overlapping area in the defroster outlet mode is relatively smaller than that in the defroster foot outlet mode. Therefore, the amount of air supplied from the side vent outlet changes according to the change in outlet mode. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2000-185541 A Summary of the Invention [Problem to be solved by the invention]

[0008] If the amount of air supplied from the side vent outlets fluctuates in so-called heating system outlet modes such as the defroster foot outlet mode and the defroster outlet mode, the thermal environment of the upper body of the passenger unfavorably fluctuates greatly.

[0009] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide an air conditioner for a vehicle that suppresses fluctuations in the amount of air blown out from a side vent outlet when the blowing mode is switched. [Means for solving the problem]

[0010] In the following description, reference numerals in the accompanying drawings are placed in parentheses to facilitate understanding of the present invention, but the present invention is not limited to the illustrated form.

[0011] According to the present disclosure, a vehicle air conditioner includes a housing (20a) having a plurality of blow-out openings (21, 22, 23, 24) through which blow-out air flows into an interior space (IS) and through which the blow-out air proceeding toward a vehicle interior (CR), a cooling heat exchanger (70) disposed in the interior space (IS) and capable of cooling the blow-out air, a heating heat exchanger (71) disposed downstream of the cooling heat exchanger (70) and capable of heating the blow-out air, a mix door (72) capable of adjusting a ratio of air passing through the heating heat exchanger (71) and air bypassing the heating heat exchanger (71), and a mode door (30, 130, 230) capable of adjusting an amount of air flowing out from the plurality of blow-out openings (21, 22, 23, 24), and the housing (20a) is provided with a plurality of blow-out openings (21, 22, 23, 24) through which the blow-out air proceeding toward a vehicle interior (CR) passes. a hot air area (HP) through which hot air heated by the heating heat exchanger (71) passes; a mixing area (MP) located downstream of the cold air area (CP) and the hot air area (HP) and capable of conditioning air with cold air and hot air; and a plurality of controlled outlets (21a, 22a, 23a, 24a) connected to a downstream end of the mixing area (MP) and through which conditioned air passing toward the plurality of blow-out openings (21, 22, 23, 24) passes, the plurality of controlled outlets (21a, 22a, 23a, 24a) having a defroster control outlet (21a), a center vent control outlet (22a), a side vent control outlet (23a), and a foot control outlet (24a),The mode door 230 includes a door main body portion (31) having a rotation axis (31c) provided along a door rotation center line (Ax) of the mode door, a pair of main body side portions (31a) extending in a direction intersecting an axial direction of the rotation axis (31c), and a main body circumferential surface portion (31b) connecting the pair of main body side portions (31a) to each other and extending in a circumferential direction, and a seal member (32) provided on an outer circumferential surface of the main body circumferential surface portion (31b). The mode door 230 includes a door main body portion (31) having a rotation axis (31c) provided along a door rotation center line (Ax) of the mode door, a pair of main body side portions (31a) extending in a direction intersecting an axial direction of the rotation axis (31c), and a seal member (32) provided on an outer circumferential surface of the main body circumferential surface portion (31b), and a door first control opening (41) through which conditioned air flows out from the center vent control outlet (22a) and the side vent control outlet (23a) in the vent blowing mode, and a seal member (32) provided away from the door first control opening (41) in the foot blowing mode. a door second control opening (42) through which conditioned air flows out from the side vent control outlet (23a) in a defroster foot blowing mode, a defroster blowing mode, and a defroster blowing mode, and a door ventilation allowing portion (43, 143, 243, 343) provided away from the door first control opening (41) and the door second control opening (42) and allowing the outflow of conditioned air from the side vent control outlet (23a) in the defroster blowing mode, wherein the door ventilation allowing portion (43, 143, 243, 343) is provided closer to the door rotation center line (Ax) than to an outer circumferential surface of the mode door (30, 130, 230).

[0012] For example, the housing (20a) has a first inner wall surface (20a1) facing the mixing region (MP) and located between the cold air region (CP) and the side vent control outlet (23a), the door ventilation permissive portion (43, 143, 243) has a seal notch portion (43d) where the seal member (32) is cut out to expose the outer circumferential surface of the main body circumferential surface portion (31b), and the outer circumferential surface of the main body circumferential surface portion (31b) and the first inner wall surface (20a1) are separated by a space. This allows the vehicle air conditioner to secure not only a flow path leading to the side vent control outlet (23a) via the door second control opening (42) in the defroster blowing mode, but also a flow path leading to the side vent control outlet (23a) via the door ventilation permissive portion (43, 143, 243) without passing through the door second control opening (42). That is, the amount of air blown out from the side vent outlet (23) can be prevented from decreasing in the defroster blowing mode relative to the defroster foot blowing mode, thereby stabilizing the thermal environment of the upper body of the passenger.

[0013] Furthermore, the vehicle air conditioner has a circumferential step surface (43w1) provided so that the outer circumferential surface of the main body circumferential surface portion (31b) approaches the door rotation center line (Ax) at the seal cutout portion (43d), and the outer circumferential surface of the main body circumferential surface portion (31b) and the circumferential step surface (43w1) are separated from the first inner wall portion (20a) via a space. This ensures that the vehicle air conditioner also has a flow path leading to the side vent control outlet (23a) through the door ventilation allowance portion (43, 143, 243) without passing through the door second control opening (42), and can increase the flow rate of air by increasing the flow path cross-sectional area of ​​the door ventilation allowance portion.

[0014] Alternatively, the housing (20a) has a first inner wall surface (20a1) facing the mixing region (MP) and located between the cold air region (CP) and the side vent control outlet (23a), the door ventilation allowance portion (243) has a circumferential step surface (243w1) provided so that the outer circumferential surface of the main body peripheral surface portion (231b) approaches the door rotation center line (Ax), the seal member (32) is provided on the outer circumferential surface of the circumferential step surface (243w1) to form a seal recess (G), and the seal recess (G) is separated from the first inner wall surface (20a1) via a space. This also ensures a flow path leading to the side vent control outlet (23a) through the door ventilation allowance portion (243) without passing through the door second control opening (42). Effect of the Invention

[0015] The present invention can provide a vehicle air conditioner that suppresses fluctuations in the amount of air blown out from the side vent blowing opening when the blowing mode is switched. [Brief description of the drawings]

[0016] [Figure 1] 1 is a perspective view of a vehicle air conditioner according to a first embodiment that is disposed in a vehicle. [Diagram 2] 2 is a cross-sectional view of the temperature conditioner of the vehicle air conditioner of the first embodiment taken along line 2-2 in FIG. [Diagram 3] FIG. 2 is a perspective view of a mode door in the vehicle air conditioner of the first embodiment. [Figure 4] 3A to 3C are diagrams illustrating the positional relationship between a mode door and a case in each blowing mode in the vehicle air conditioner of the first embodiment. [Diagram 5] FIG. 4 is an operational diagram of the vehicle air conditioner of the first embodiment in a defroster mode. [Figure 6] FIG. 6(a) is a diagram showing a first modified example of the first embodiment, and FIG. 6(b) is a diagram showing a second modified example of the first embodiment. [Figure 7] FIG. 11 is a perspective view of a mode door in a vehicle air conditioner according to a second embodiment. [Figure 8]FIG. 11 is an operational diagram of the vehicle air conditioner according to the second embodiment in a defroster mode. [Figure 9] FIG. 11 is a perspective view of a mode door in a vehicle air conditioner according to a third embodiment. [Figure 10] FIG. 11 is an operational diagram of the vehicle air conditioner according to the third embodiment in a defroster mode. [Figure 11] FIG. 13 is a perspective view of a mode door in another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The embodiment will be described with reference to the attached drawings. In the drawings, Fr indicates front, Rr indicates rear, Le indicates left, Ri indicates right, Up indicates top, and Dn indicates bottom. Note that these directions are used for convenience in explaining the vehicle air conditioner described below, and do not limit the orientation of the vehicle air conditioner when it is installed in a vehicle.

[0018] <Example 1> Please refer to Fig. 1. A vehicle air conditioner 1 is mounted in the vehicle interior CR of a passenger vehicle, for example, and takes in air from outside or inside the vehicle interior to adjust the temperature. The vehicle air conditioner 1 includes a blower 10 that blows out the sucked air, and a temperature conditioner 20 that conditions the temperature of the air blown from the blower 10 and blows out the conditioned air into the vehicle interior CR.

[0019] The blower 10 takes in air by the rotation of an impeller (not shown) driven by an electric motor (not shown). The blower 10 is equipped with an outside air inlet 11 that draws in air outside the vehicle cabin, an inside air inlet 12 that draws in air inside the vehicle cabin, an intake door 13 that adjusts the opening degree of the outside air inlet 11 and the inside air inlet 12, and a filter 14 that removes foreign matter from the drawn-in air. The air that has passed through the filter 14 and the impeller is sent to a temperature conditioning device 20.

[0020] 1 and 2. The temperature conditioning device 20 includes a housing 20a having a plurality of blowing openings 21, 22, 23, 24 through which the blowing air flows into the internal space IS and through which the blowing air proceeding toward the vehicle interior CR passes, a cooling heat exchanger 70 disposed in the internal space IS and capable of cooling the blowing air, a heating heat exchanger 71 disposed downstream of the cooling heat exchanger 70 and capable of heating the blowing air, a mix door 72 capable of adjusting the ratio of air passing through the heating heat exchanger 71 and air bypassing the heating heat exchanger 71, and a mode door 30 capable of adjusting the amount of air flowing out from the plurality of blowing openings 21, 22, 23, 24.

[0021] The housing 20a is connected to the blower 10. The air sent from the blower 10 flows from the front to the rear of the internal space IS.

[0022] The housing 20a has a cold air area CP through which cold air cooled by the cooling heat exchanger 70 passes, a hot air area HP through which hot air heated by the heating heat exchanger 71 passes, a mixing area MP located downstream of the cold air area CP and the hot air area HP and capable of conditioning air with cold air and hot air, and a plurality of controlled flow outlets 21a, 22a, 23a, 24a which are connected to the downstream end of the mixing area MP and through which conditioned air passes toward the plurality of blowing openings 21, 22, 23, 24.

[0023] The multiple control outlets 21a, 22a, 23a, 24a include a defroster control outlet 21a that flows out to the defroster outlet 21, a center vent control outlet 22a that flows out to the center vent outlet 22, a side vent control outlet 23a that flows out to the side vent outlet 23, and a foot control outlet 24a that flows out to the foot outlet 24. The center vent control outlet 22a and the side vent control outlet 23a may be collectively referred to as the vent control outlets 22a, 23a.

[0024] The control flow outlets 21a, 22a, 23a, and 24a are provided spaced apart from one another. The control flow outlets 21a, 22a, 23a, and 24a are separated from one another by mixing region inner wall surfaces 20a1, 20a2, and 20a3.

[0025] The mixing area inner wall surfaces 20a1, 20a2, and 20a3 are provided in the area of ​​the housing 20a facing the mixing area MP. The mixing area inner wall surfaces 20a1, 20a2, and 20a3 include a first inner wall surface 20a1 that forms between the cold air area CP and the side vent control outlet 23a, a second inner wall surface 20a2 that forms between the side vent control outlet 23a and the foot control outlet 24a, and a third inner wall surface 20a3 that forms between the foot control outlet 24a and the hot air area HP. The defroster control outlet 21a is not shown in the cross section shown in FIG. 2, but this is because the cross section shows a portion where the defroster outlet 21 is not formed, as shown by the line 2-2 in FIG. 1. Although not shown, if the position of the line 2-2 is the position where the defroster outlet 21 is formed, the defroster control outlet 21a is shown.

[0026] The housing 20a is provided with a side vent outflow passage 23b (see FIG. 5) that is formed from the side vent control outlet 23a toward the outside of the housing 20a and connects the side vent control outlet 23a and the side vent outlet opening 23. The side vent outflow passage 23b has a first side vent outflow passage wall surface 23b1 extending in a direction intersecting the door rotation center line Ax of the mode door 30 described later and connected to the first inner wall surface 20a1, a second side vent outflow passage wall surface 23b2 facing the first side vent outflow passage wall surface 23b1 and connected to the second inner wall surface 20a2, a third side vent outflow passage wall surface 23b3 (see Figure 4) extending along the rotation direction of the mode door 30 and connecting the first side vent outflow passage wall surface 23b1 and the second side vent outflow passage wall surface 23b2, and a fourth side vent outflow passage wall surface 23b4 (see Figure 4) facing the third side vent outflow passage wall surface 23b3.

[0027] The side vent blowing opening 23 is provided as one of the downstream ends of the housing 20a. It extends from the side vent control outlet 23a through the side vent outflow passage 23b to the side vent blowing opening 23. The side vent blowing opening 23 is connected to a side vent duct 83 (see FIG. 1) and supplies conditioned air to the left and right ends of the front seats in the vehicle interior (CR). The conditioned air that flows out to the side vent control outlet 23a is blown out into the vehicle interior CR through the side vent outflow passage 23b, the side vent blowing opening 23, and the side vent duct 83. Ducts are also connected to other blowing openings as necessary, and conditioned air is blown out into the vehicle interior (CR).

[0028] The cooling heat exchanger 70 can cool the blown air, for example, by the refrigerant flowing inside absorbing heat from the blown air. The refrigerant flows into the cooling heat exchanger 70 from the refrigerant inlet 28a and flows out from the refrigerant outlet 28b.

[0029] The heating heat exchanger 71 can heat the blown air, for example, by the heat medium flowing inside thereof releasing heat to the blown air. The heat medium flows into the heating heat exchanger 71 from the heat medium inlet 29a and flows out from the heat medium outlet 29b. The heat medium may be engine cooling water or hot water heated by an electric heating wire (not shown). Alternatively, the heating heat exchanger 71 is not limited to a form in which a heat medium flows inside. In other words, the heating heat exchanger 71 itself may generate heat by electricity and release the heat to the blown air. The number of heating heat exchangers 71 is not limited to one, and multiple heating heat exchangers 71 may be provided.

[0030] <Mixed Door> The mix door 72 is provided slidably between the cold air region CP and the mixing region MP, and between the hot air region HP and the mixing region MP. The mix door 72 has the shape of a rotary door that rotates coaxially with the mode door 30. Depending on the opening degree of the mix door 72, it is possible to adjust the position among a full cool position that allows only cold air to pass through the cold air region CP, a full hot position that allows only hot air to pass through the hot air region HP, and a mix position that allows both cold air to pass through the cold air region CP and hot air to pass through the hot air region HP.

[0031] When the mix door 72 is in the full cool position, the mix door 72 closes the gap between the hot air region HP and the mixing region MP and opens the gap between the cold air region CP and the mixing region MP. When the mix door 72 is in the full hot position, the mix door 72 closes the gap between the cold air region CP and the mixing region MP and opens the gap between the hot air region HP and the mixing region MP. When the mix door 72 is in the mix position, the mix door 72 is located between the full cool position and the full hot position and partially opens the gap between the hot air region HP and the mixing region MP, and the gap between the cold air region CP and the mixing region MP.

[0032] <Mode Door> Next, a description will be given of the mode door 30. The mode door 30 is rotatably supported by the housing 20a and is provided so as to rotate within the mixing area MP. The mode door 30 is in the form of a rotary door that rotates coaxially with the mix door 72, for example.

[0033] With reference to Fig. 3, the mode door 30 has a door main body portion 31 having a rotation axis 31c provided along the door rotation center line Ax of the mode door 30, a pair of main body side portions 31a extending in a direction intersecting the axial direction of the rotation axis 31c, and a main body circumferential surface portion 31b connecting the pair of main body side portions 31a and extending in the circumferential direction, and a seal member 32 provided on the outer circumferential surface of the main body circumferential surface portion 31b.

[0034] The mode door 30 has, for example, a motor (not shown) connected to the rotation shaft 31c, and the mode door 30 is rotated by the driving of the motor. The center of rotation at this time is represented by the door rotation center line Ax, which passes through the center of the rotation shaft 31c. In this embodiment, the rotation shaft 31c is provided on each of the pair of main body side portions 31a along the door rotation center line Ax, but it may be provided continuously from one main body side portion 31a to the other main body side portion 31a.

[0035] The seal member 32 is made of a compressible material. Examples of the compressible material include elastic materials such as foamed resin. A skin layer (not shown) may be further provided on the outer peripheral surface of the seal member 32. The thickness of the seal member 32 when not compressed is thicker than the dimension of the gap between the door main body portion 31 of the mode door 30 and the mixing area inner wall surfaces 20a1, 20a2, and 20a3 of the housing 20a, and the surface of the seal member 32 abuts against the mixing area inner wall surfaces 20a1, 20a2, and 20a3, so that the seal member 32 is compressed toward the inside in the radial direction of the mode door 30. The compression prevents air from flowing through the gap between the door main body portion 31 and the mixing area inner wall surfaces 20a1, 20a2, and 20a3.

[0036] In this embodiment, in the area where the seal member 32 is affixed to the door main body portion 31, the surface (radial outer surface) of the seal member 32 is the outer peripheral surface 30a of the mode door 30, and in the area where the seal member 32 is not affixed to the door main body portion 31, the appearance (radial outer surface) of the door main body portion 31 is the outer peripheral surface 30a of the mode door 30.

[0037] Also refer to FIG. 4. The frames shown by dotted lines in FIG. 4 are the controlled outlets formed in the housing 20a, and are the defroster controlled outlet 21a, the center vent controlled outlet 22a, the side vent controlled outlet 23a, and the foot controlled outlet 24a. The frames shown by solid lines inside the mode door 30 are the controlled openings or ventilation allowance parts of the mode door 30, and are the door first controlled opening 41, the door second controlled opening 42, and the door ventilation allowance part 43. The filled-in parts indicate the areas (overlap areas) where the controlled outlets formed in the housing 20a and the controlled openings or ventilation allowance parts of the mode door 30 overlap, and conditioned air can flow out from the mixing area MP toward the vehicle interior CR. The controlled outlets, the controlled outlets, and the overlap areas are arranged around the door rotation center line Ax, but are shown in a planar development in FIG. 4.

[0038] Various blowing modes are defined by the rotational position of the mode door 30. In Fig. 4, the main blowing modes are shown as a VENT blowing mode, a Bi-Level blowing mode, a FOOT blowing mode, a Def Foot blowing mode, and a DEF blowing mode. The details of each blowing mode will be described later.

[0039] <Door No. 1 Control Opening> The mode door 30 has a door first control opening 41 that overlaps with the center vent control outlet 22a and the side vent control outlet 23a in the vent blowing mode. Although not shown, this door first control opening 41 is a hole opened in the main body peripheral surface portion 31b, and is not covered with the seal member 32. As can be seen from Fig. 4, the door first control opening 41 is a rectangular hole having approximately the same length as the length of the mode door 30 in the direction along the door rotation center line Ax.

[0040] <Door No. 2 Control Opening> The mode door 30 has a door second control opening 42, 42 that overlaps with the two side vent control outlets 23a, 23a in the foot blowing mode, the defroster foot blowing mode, and the defroster blowing mode. The door second control opening 42, 42 is composed of an opening 42h, 42h opened in the main body peripheral surface portion 31b and a seal cutout 42d, 42d as shown in Fig. 3, and communicates the internal space of the mode door 30 with the external space. The seal cutout 42d and the opening 42h do not need to be the same size, and the seal cutout 42d may be larger than the opening 42h, thereby exposing a part of the main body peripheral surface portion 31b.

[0041] 3 and 4, the door second control openings 42, 42 are formed in the vicinity of both ends of the length of the mode door 30 in the direction along the door rotation centerline Ax. This allows them to overlap with the side vent control outlets 23a, 23a arranged on both sides of the center vent control outlet 22a in the direction along the door rotation centerline Ax. Also, they are formed at a position away from the door first control opening 41 in the rotation direction of the mode door 30. This allows them to overlap with the side vent control outlets 23a, 23a in the blowing modes (foot blowing mode, defroster foot blowing mode, defroster blowing mode) in which the door first control opening 41 and the side vent control outlets 23a, 23a do not overlap.

[0042] <Door ventilation allowance section> The mode door 30 has a door ventilation allowing portion 43, 43 that overlaps with the side vent control outlet 23a, 23a in the defroster blowing mode. The door ventilation allowing portion 43, 43 has a seal notch portion 43d where the seal member 32 is cut out to expose the outer circumferential surface of the main body peripheral surface portion 31b, and ventilation steps 43a1, 43a2 provided so that the outer circumferential surface of the main body peripheral surface portion 31b approaches the door rotation center line Ax. More specifically, the ventilation steps 43a1, 43a2 have a circumferential step surface 43w1 that extends along the circumferential direction of the mode door 30, a radial step surface 43w2 that extends along a direction intersecting the circumferential step surface 43w1, and a connecting step surface 43w3 that extends in a direction intersecting the door rotation center line Ax and connects the circumferential step surface 43w1 and the radial step surface 43w2. Here, the circumferential step surface 43w1 does not have a hole (does not have a hole in a direction extending radially from the door rotation center line Ax). The advantages of the circumferential step surface 43w1 not having a hole will be described later.

[0043] As can be seen from Fig. 3 and Fig. 4, the door ventilation allowing portions 43, 43 are formed in the vicinity of both ends of the length of the mode door 30 in the direction along the door rotation centerline Ax. This allows them to overlap with the side vent control outlets 23a, 23a arranged on both sides of the center vent control outlet 22a in the direction along the door rotation centerline Ax. In addition, they are formed at positions away from the door second control openings 42, 42 in the rotation direction of the mode door 30 and on the opposite side to the door first control opening 41. This allows them to overlap with the side vent control outlets 23a, 23a in the blowing mode (defroster blowing mode) in which the door first control opening 41 and the door second control openings 42, 42 do not overlap with the side vent control outlets 23a, 23a.

[0044] 5. The mode door 30 is in a rotation position in the defroster blowing mode. The ventilation steps 43a1, 43a2 of the door ventilation allowance portion 43 are configured to be close to the door rotation center line Ax with respect to the first inner wall surface 20a1 (the inner wall surface facing the mixing region MP and located between the cold air region CP and the side vent control outlet 23a) of the housing 20a. The ventilation steps 43a1, 43a2 are separated from the first inner wall surface 20a1 via a space so as to obtain a predetermined radial control dimension D1. That is, the outer circumferential surface of the main body peripheral surface portion 31b of the mode door 30 is separated from the first inner wall surface 20a1 via a space in the door ventilation allowance portion 43.

[0045] Please refer to Fig. 3. The door ventilation allowing portion 43, 43 is configured to include a first step portion 43a1 located on the central side in the direction along the door rotation center line Ax and a second step portion 43a2 located on the end side, and it is preferable to provide a rib 43r between the first step portion 43a1 and the second step portion 43a2. The strength of the door ventilation allowing portion 43 can be increased by the rib 43r.

[0046] The operation of the vehicle air conditioner 1 described above will now be described.

[0047] <Vent blowing mode> Please refer to Figures 2 and 4. The vent blowing mode is a mode in which conditioned air C2 is blown out from the center vent blowing opening 22 and the side vent blowing openings 23, 23 toward the upper bodies of passengers in the vehicle interior CR.

[0048] The air sent from the blower 10 to the internal space IS of the housing 20a is cooled by the cooling heat exchanger 70 to become cold air C1, which then flows into the cold air region CP.

[0049] The mix door 72 is usually in the full cool position. The cold air C1 will be described as flowing entirely from the cold air area CP to the mixing area MP.

[0050] The mode door 30 is in the vent outlet position. The door first controlled opening 41 overlaps with the center vent controlled outlet 22a and the side vent controlled outlet 23a. The door second controlled openings 42, 42 do not overlap with any of the controlled outlets. The door ventilation permissive portions 43, 43 do not overlap with any of the controlled outlets.

[0051] As a result, the cold air C1 that flows into the mixing area MP becomes cold air C2 and is supplied to the vehicle interior CR through the center vent control outlet 22a, the center vent outlet opening 22, and a center vent duct not shown, and is also supplied to the vehicle interior CR through the side vent control outlet 23a, the side vent outlet opening 23, and the side vent duct 83 (see Figure 1).

[0052] <Bi-level blowing mode> Please refer to Figures 2 and 4. The bi-level blowing mode is a mode in which conditioned air is blown out from the center vent blowing opening 22 and the side vent blowing opening 23 toward the upper bodies of the occupants in the vehicle interior CR, and conditioned air is blown out from the foot blowing opening 24 toward the feet of the occupants in the vehicle interior CR.

[0053] The air sent from the blower 10 to the internal space IS of the housing 20a is cooled by the cooling heat exchanger 70 to become cold air C1, which then flows into the cold air region CP.

[0054] The mix door 72 is usually in the mix position. A part of the cold air C1 flows from the cold air area CP to the mixing area MP, and the rest is heated by the heating heat exchanger 71 and becomes hot air and flows into the mixing area MP.

[0055] The mode door 30 is in a bi-level blowing position. The door first controlled opening 41 partially overlaps with the center vent controlled outlet 22a and the side vent controlled outlet 23a, and partially overlaps with the foot controlled outlet 24a. The door second controlled openings 42, 42 do not overlap with any of the controlled outlets. The door ventilation permissive portions 43, 43 do not overlap with any of the controlled outlets.

[0056] As a result, the cold air C1 and warm air flowing into the mixing area MP are mixed to become temperature-adjusted air, which is supplied to the vehicle interior CR through the center vent control outlet 22a, the center vent outlet 22, and a center vent duct not shown, supplied to the vehicle interior CR through the side vent control outlet 23a, the side vent outlet 23, and a side vent duct 83 (see Figure 1), and supplied to the vehicle interior CR through the foot control outlet 24a, the foot outlet 24, and a foot duct not shown.

[0057] <Foot blowing mode> Please refer to Figures 4 and 5. The foot outlet mode is a mode in which conditioned air is blown out from the foot outlet opening 24 towards the feet of the occupant in the vehicle interior CR.

[0058] The air sent from the blower 10 to the internal space IS of the housing 20a is cooled in the cooling heat exchanger 70 to become cold air C1, or flows into the cold air area CP as cold air C1 that has not been heat exchanged in the cooling heat exchanger 70.

[0059] The mix door 72 is usually in the full hot position. The following description will be given assuming that the cold air C1 is entirely heated by the heating heat exchanger 71 to become hot air H1 (see FIG. 5) and flows from the hot air area HP to the mixing area MP.

[0060] The mode door 30 is in the foot outlet position. The door first controlled opening 41 overlaps with the foot controlled outlet 24a. The door second controlled openings 42, 42 entirely overlap with the side vent controlled outlets 42, 42. The door ventilation permissive portions 43, 43 do not overlap with any of the controlled outlets.

[0061] As a result, most of the warm air H1 that flows into the mixing area MP is supplied to the vehicle interior CR through the foot control outlet 24a, the foot outlet opening 24, and a foot duct not shown, while a portion of the warm air H1 is supplied to the vehicle interior CR through the side vent control outlet 23a, the side vent outlet opening 23, and the side vent duct 83 (see Figure 1).

[0062] <Defroster foot blowing mode> 4 and 5. The defroster foot outlet mode is a mode in which conditioned air is blown out from the foot outlet 24 toward the feet of the occupants in the vehicle interior CR, and from the defroster outlet 21 toward a front window glass (not shown) in the vehicle interior CR.

[0063] The air sent from the blower 10 to the internal space IS of the housing 20a is cooled in the cooling heat exchanger 70 to become cold air C1, or flows into the cold air area CP as cold air C1 that has not been heat exchanged in the cooling heat exchanger 70.

[0064] The mix door 72 is usually in the full hot position. The following description will be given assuming that the cold air C1 is entirely heated by the heating heat exchanger 71 to become hot air H1 (see FIG. 5) and flows from the hot air area HP to the mixing area MP.

[0065] The mode door 30 is in the defrost foot outlet position. The door first control opening 41 partially overlaps with the foot control outlet 24a. The door second control openings 42, 42 entirely overlap with the side vent control outlets 42, 42. The door ventilation permissive portions 43, 43 do not overlap with any of the control outlets. Also, as shown in FIG. 4, the end of the mode door 30 is located in the middle portion of the defroster control outlet 21a. That is, a portion of the defroster control outlet 21a is opened.

[0066] As a result, about half of the warm air H1 that has flowed into the mixing area MP is supplied to the vehicle interior CR through the foot control outlet 24a, the foot outlet 24, and a foot duct (not shown), and the remaining half is supplied to the vehicle interior CR through the defroster control outlet 21a, the defroster outlet 21, and a defroster nozzle (not shown). Then, a part of the warm air H1 is supplied to the vehicle interior CR through the side vent control outlet 23a, the side vent outlet 23, and the side vent duct 83 (see FIG. 1).

[0067] <Defroster blowing mode> Please refer to Figures 4 and 5. The defroster outlet mode is a mode in which conditioned air is blown out from the defroster outlet opening 21 toward the front window glass of the vehicle interior CR.

[0068] The air sent from the blower 10 to the internal space IS of the housing 20a is cooled in the cooling heat exchanger 70 to become cold air C1, or flows into the cold air area CP as cold air C1 that has not been heat exchanged in the cooling heat exchanger 70.

[0069] The mix door 72 is usually in the full hot position. The following description will be given assuming that the cold air C1 is entirely heated by the heating heat exchanger 71 to become hot air H1 (see FIG. 5) and flows from the hot air area HP to the mixing area MP.

[0070] The mode door 30 is in the defroster blowing position. The door first control opening 41 does not overlap any of the controlled outlets. The door second control openings 42, 42 partially overlap the side vent control outlets 23a, 23a. The door ventilation permissive portions 43, 43 partially overlap the side vent control outlets 23a, 23a. Also, as shown in FIG. 4, an end of the mode door 30 is located at the end of the defroster control outlet 21a, or closer to the center vent control outlet 22a than the end of the defroster control outlet 21a. That is, the entire defroster control outlet 21a is opened.

[0071] 5. As a result, most of the warm air H1 flowing into the mixing region MP becomes warm air H2 and is supplied to the vehicle interior CR through the defroster control outlet 21a, the defroster outlet 21, and the defroster nozzle (not shown). A part of the warm air H1 flows into the side vent control outlet 23a through the door second control openings 42, 42, and becomes warm air H3, which is supplied to the vehicle interior CR through the side vent outlet 23. Another part of the warm air H1 flows into the side vent control outlet 23a through the door ventilation permissive portions 43, 43, and becomes warm air H4, which is supplied to the vehicle interior CR through the side vent outlet 23.

[0072] 5, the warm air flowing through the side vent outlet 23 is composed of a component of warm air H3 flowing in through the door second control openings 42, 42 and a component of warm air H4 flowing in through the door ventilation allowance portions 43, 43. Therefore, in the defroster outlet mode, the volume of warm air flowing through the side vent outlet 23 (side vent bleed volume) is made sufficient, and the difference with the side vent bleed volume in the defroster foot outlet mode can be suppressed.

[0073] <Effect of radial control dimension D1> 5, the circumferential step surface 43w1 of the first step portion 43a1 and the second step portion 43a2 is spaced apart from the first inner wall surface 20a1 of the housing so as to obtain a predetermined radial control dimension D1. Therefore, even if an error occurs in the rotational position when the mode door 30 is adjusted to be in the defroster blowing position, there is no (or only a small) fluctuation in the radial control dimension D1, so that the circumferential passage cross-sectional area of ​​the hot air H4 can be maintained and fluctuations in the flow rate of the hot air H4 can be suppressed. In order to reduce the effect of a shift in the rotational position of the mode door 30 in the defroster blowing position on the fluctuations in the radial control dimension D1, it is preferable that the shape of the circumferential step surface 43w1 is in the circumferential direction along the rotational direction of the mode door 30.

[0074] In addition, in order for the circumferential step surface 43w1 of the first step portion 43a1 and the second step portion 43a2 to obtain a predetermined radial control dimension D1 relative to the first inner wall surface 20a1 of the housing, it is preferable that the circumferential step surface 43w1 does not have a hole portion.

[0075] <Effects of circumferential control dimensions E1 and E2> 5, when the mode door 30 is in the defroster blowing position, the first step portion 43a1 and the second step portion 43a2 of the door ventilation allowance portion are disposed to obtain a first circumferential control dimension E1 relative to the first side vent outflow passage wall surface 23b1. More specifically, the mode door 30 is disposed such that the radial step surface 43w2 is separated from the first side vent outflow passage wall surface 23b1 via a space to obtain the first circumferential control dimension E1. Similarly, the door second control opening 42 is disposed to obtain a second circumferential control dimension E2 relative to the second side vent outflow passage wall surface 23b2. Here, a case where an error occurs in the rotational position when the rotational position of the mode door 30 is adjusted to be in the defroster blowing position will be considered.

[0076] When the mode door 30 is positioned clockwise from a predetermined rotational position, the second circumferential control dimension E2 is shortened, and the flow rate of the hot air H3 is reduced. At the same time, the first circumferential control dimension E1 is lengthened, and the flow rate of the hot air H4 is increased. Therefore, even if an error occurs in the rotational position of the mode door 30, it is possible to suppress fluctuations in the volume of the hot air passing through the side vent outlet 23 (side vent bleed volume).

[0077] When the mode door 30 is positioned counterclockwise from a predetermined rotational position, the second circumferential control dimension E2 is increased, and the flow rate of the hot air H3 is increased. At the same time, the first circumferential control dimension E1 is decreased, and the flow rate of the hot air H4 is decreased. Therefore, even if an error occurs in the rotational position of the mode door 30, it is possible to suppress fluctuations in the volume of the hot air passing through the side vent outlet 23 (side vent bleed volume).

[0078] Next, modified examples of this embodiment will be described. Please refer to Fig. 6. Fig. 6(a) shows modified example 1 of embodiment 1, and Fig. 6(b) shows modified example 2 of embodiment 1. Modification examples 1 and 2 differ from embodiment 1 in the configuration of the door ventilation allowing portion 43. For parts common to embodiment 1, the same reference numerals will be used and detailed description will be omitted.

[0079] <Variation 1> The mode door 30 of the first modification has chamfered portions 43x between the circumferential step surface 43w1 and the radial step surface 43w2 in the first step portion 43a1 and the second step portion 43a2.

[0080] The conditioned air H4 flowing near the door ventilation allowing portion 43 passes between the first inner wall surface 20a1 and the circumferential step surface 43w1 (after passing along the circumferential direction of the mode door 30), and then flows along the chamfered portion 43x, thereby allowing it to smoothly pass between the side vent outflow passage 23b and the radial step surface 43w2 (pass along the radial direction of the mode door 30). In other words, it is possible to reduce the passage resistance of the conditioned air H4 flowing near the door ventilation allowing portion 43. In addition, by smoothly changing the flow direction of the warm air H4, it is possible to reduce noise.

[0081] <Variation 2> The mode door 30 of the second modified example has a curved surface portion 43y between the circumferential step surface 43w1 and the radial step surface 43w2 in the first step portion 43a1 and the second step portion 43a2.

[0082] The second modification provides the same functions and effects as the first modification.

[0083] <Example 2> Next, a vehicle air conditioner 1A according to a second embodiment will be described. The vehicle air conditioner 1A according to the second embodiment differs from the first embodiment in the configuration of the door ventilation permitting portion 143 of the mode door 130. The same reference numerals will be used for the parts common to the first embodiment, and detailed description will be omitted.

[0084] Please refer to Fig. 7 and Fig. 8. Fig. 7 is a view corresponding to Fig. 3, and Fig. 8 is a view showing the operation in the defroster blowing mode. The vehicle air conditioner 1A of the second embodiment is characterized in that the door-ventilation allowing portion 143 does not have a ventilation step.

[0085] The door ventilation allowing portion 143 is formed by attaching a seal member 132 having seal cutouts 43d, 43d to the main body circumferential surface portion 31b as shown in Fig. 7. Then, as shown in Fig. 8, in the defroster blowing mode, the outer circumferential surface of the main body circumferential surface portion 31b is separated from the first inner wall surface 20a via a space so as to obtain a predetermined radial control dimension D2.

[0086] The door-ventilation allowing portion 143 does not have a ventilation step. The radial control dimension D2 is set to be smaller than the thickness of the seal member 132 before compression.

[0087] The mode door 130 of this embodiment can be produced by attaching a seal member 132 having a seal cutout 43d to a door body 131 that does not have the first step 43a1 and the second step 43a2. Therefore, the door body 131 can be used regardless of whether or not it has the door ventilation allowing portion 143, improving the versatility of the part.

[0088] <Example 3> Next, a vehicle air conditioner 1B according to a third embodiment will be described. The vehicle air conditioner 1B according to the third embodiment differs from the above-described first and second embodiments in the configuration of a door ventilation permitting portion 243 of a mode door 230. The same reference numerals will be used for the parts common to the first embodiment, and detailed descriptions thereof will be omitted.

[0089] Please refer to Fig. 9 and Fig. 10. Fig. 9 is a view corresponding to Fig. 3, and Fig. 10 is a view showing the operation in the defroster blowing mode. The vehicle air conditioner 1B of the third embodiment is characterized in that a seal member 232 is present for the door-ventilation allowing portion 243.

[0090] 9, the mode door 230 is configured by attaching a seal member 232 not including seal notches 43d, 43d to a main body circumferential surface portion 231b. The main body circumferential surface portion 231b has door ventilation allowance portions 243, 243 at positions corresponding to the side vent control outlet 23a in the defroster blowing mode. The seal member 232 is attached to the main body circumferential surface portion 231b and is also attached continuously to the outer surfaces of the door ventilation allowance portions 243, 243. Then, seal recesses G, G are formed on the outer surface of the main body circumferential surface portion 231b closer to the door rotation center line Ax than the area where the seal member 232 is attached (the general outer surface of the mode door 230).

[0091] As shown in Figure 10, in the defroster blowing mode, the outer peripheral surface of the door ventilation allowing portion 243 facing the first inner wall surface 20a1, i.e., the sealing recess G, is separated from the first inner wall surface 20a by a space so as to obtain a predetermined radial control dimension D3.

[0092] The mode door 230 of this embodiment can be produced by attaching a seal member 232 that does not have a seal notch 43d to a door main body 231 that has a circumferential step surface 243w1. Therefore, the seal member 232 that does not have a seal notch 43d can be used regardless of whether or not the door ventilation allowing portion 243 is provided, thereby improving the versatility of the part.

[0093] <Other Examples> The components of each embodiment may be appropriately combined as long as the functions and effects of the present invention are achieved. For example, Fig. 11 shows a mode door 330 that combines the first and second embodiments. The door ventilation allowing portion 343 of the mode door 330 is provided with only the second step portion 43a2. With this configuration, the amount of air passing through the door ventilation allowing portion 343 can be adjusted. [Industrial Applicability]

[0094] The vehicle air conditioner of the present invention is suitable for use as an air conditioner mounted in a passenger car. [Explanation of symbols]

[0095] 1, 1A, 1B...Vehicle air conditioning device 10...Blower 20…Temperature conditioning device 20a…Housing 20a1…First inner wall surface 21…Defroster outlet opening 21a…Defroster control outlet 22…Center vent opening 22a…Center vent controlled outlet 23…Side vent opening 23a…Side vent controlled outlet 24…Foot outlet 24a…Foot controlled outlet 30, 130, 230, 330…Mode door 31…Door body 31a…Main body side part 31b…Body peripheral part 31c…Rotating shaft 32...Sealing material 41…Door No. 1 Control Opening 42…Door No. 2 controlled opening 43, 143, 243, 343…Door ventilation section 43a1…First step 43a2…Second step 70…Cooling heat exchanger 71...Heating heat exchanger 72…Mixed Door IS…interior space CP…Cold air area HP: Hot air area MP…Mixed area CR…Car interior Ax: Door rotation center line

Claims

1. a housing (20a) having a plurality of blow-out openings (21, 22, 23, 24) through which blown air flows into an interior space (IS) and through which the blown air flows toward a vehicle interior (CR); A cooling heat exchanger (70) arranged in the internal space (IS) and capable of cooling the blown air; a heating heat exchanger (71) arranged downstream of the cooling heat exchanger (70) and capable of heating the blown air; a mix door (72) capable of adjusting the ratio of air passing through the heating heat exchanger (71) to air bypassing the heating heat exchanger (71); a mode door (30, 130, 230, 330) capable of adjusting the amount of air flowing out from the plurality of air outlets (21, 22, 23, 24), The housing (20a) has a cold air region (CP) through which cold air cooled by the cooling heat exchanger (70) passes, a hot air region (HP) through which hot air heated by the heating heat exchanger (71) passes, a mixing region (MP) located downstream of the cold air region (CP) and the hot air region (HP) and capable of conditioning air with cold air and hot air, and a plurality of controlled flow outlets (21a, 22a, 23a, 24a) connected to the downstream end of the mixing region (MP) and through which conditioned air passing toward the plurality of blowing openings (21, 22, 23, 24) passes, The plurality of control outlets (21a, 22a, 23a, 24a) include a defroster control outlet (21a), a center vent control outlet (22a), a side vent control outlet (23a), and a foot control outlet (24a); The mode door (30, 130, 230, 330) comprises a door body portion (31) having a rotation axis (31c) provided along a door rotation center line (Ax) of the mode door, a pair of body side portions (31a) extending in a direction intersecting an axial direction of the rotation axis (31c), and a body peripheral surface portion (31b) connecting the pair of body side portions (31a) to each other and extending in a circumferential direction, and a seal member (32) provided on an outer circumferential surface of the body peripheral surface portion (31b), a door first control opening (41) through which conditioned air flows out from the center vent control outlet (22a) and the side vent control outlet (23a) in a vent blowing mode, a door second control opening (42) provided away from the door first control opening (41) and through which conditioned air flows out from the side vent control outlet (23a) in a foot blowing mode, a defroster foot blowing mode and a defroster blowing mode, and a door ventilation allowing portion (43, 143, 243, 343) provided away from the door first control opening (41) and the door second control opening (42) and allowing the outflow of conditioned air from the side vent control outlet (23a) in the defroster blowing mode, The vehicle air conditioning system is characterized in that the door ventilation allowing portion (43, 143, 243, 343) is provided closer to the door rotation center line (Ax) than the outer peripheral surface of the mode door (30, 130, 230, 330).

2. The housing (20a) has a first inner wall surface (20a1) facing the mixing region (MP) and positioned between the cold air region (CP) and the side vent control outlet (23a), The door ventilation allowing portion (43, 143) has a seal notch portion (43d) where the seal member (32) is cut out to expose the outer circumferential surface of the main body circumferential surface portion (31b), 2. The vehicle air conditioning system according to claim 1, wherein an outer circumferential surface of the main body circumferential surface portion is separated from the first inner wall surface via a space.

3. The door ventilation allowing portion (143) has a circumferential step surface (43w1) provided in the seal notch portion (43d) so that the outer circumferential surface of the main body circumferential surface portion (31b) approaches the door rotation center line (Ax), The vehicle air conditioning system according to claim 2, wherein an outer circumferential surface of the main body circumferential surface portion (31b) and the circumferential step surface (43w1) are separated from the first inner wall portion (20a) via a space.

4. The housing (20a) has a first inner wall surface (20a1) facing the mixing region (MP) and positioned between the cold air region (CP) and the side vent control outlet (23a), The door ventilation allowing portion (243) has a circumferential step surface (243w1) provided so that the outer circumferential surface of the main body circumferential surface portion (231b) approaches the door rotation center line (Ax), The seal member (32) is provided on the outer circumferential surface of the circumferential step surface (243w1) to form a seal recess (G), 2. The vehicle air conditioning system according to claim 1, wherein the sealing recess (G) is separated from the first inner wall surface (20a1) via a space.

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