WO2023119445A1 - Vehicular air-conditioning device - Google Patents

Abstract

In this double-layer-flow vehicular air-conditioning device, fan volume is ensured in the location where air introduced into one layer side of a casing and air introduced into another layer side of the casing merge, while the air introduced into the one layer side of the casing is made to flow smoothly toward a defroster venting outlet.　This vehicular air-conditioning device is provided with a casing that houses a heat exchanger, and a partitioning section that partitions a blown air flow-path inside the casing into a first layer space and a second layer space, with a first venting section disposed along the first layer-space side and a second venting section along the second layer-space side, wherein: on a leeward end portion of the partitioning section, provided is a fan-direction changing section for changing the direction of air flowing through the first layer space so the said air is directed toward the first venting section; near the fan-direction changing section, provided is a blown air flow-path switching section for switching whether air that flows through the second layer space merges with air that flows through the first layer space, or flows to the second venting section; and in an instance in which air that flows through the second layer space flows to the second venting section, in comparison with an instance in which air that flows through the second layer space merges with air that flows through the first layer space, the tip-end position of the fan-direction changing section is shifted more toward the first layer-space side along a direction in which the first layer space and the second layer space are stacked.

Description

vehicle air conditioner

The present invention relates to a vehicle air conditioner.

2. Description of the Related Art Conventionally, there has been known a vehicle air conditioner having a two-layer flow structure of inside and outside air, which can simultaneously introduce air inside the vehicle (inside air) and air outside the vehicle (outside air) and separate the inside air from the outside air. there is This vehicle air conditioner has a casing that accommodates an air blower and a heat exchanger. In the case of the inside/outside air two-layer flow mode, the inside air is introduced to the lower side of the casing and the outside air is introduced to the upper side of the casing. After passing through each heat exchanger, the air introduced from the lower side of the casing is supplied to the vicinity of the foot (foot air outlet), while the air introduced from the upper side of the casing is supplied to the defroster outlet, so that the front Heating efficiency is improved while suppressing fogging of the glass (see Patent Document 1 below).

JP 2018-144532 A

According to the prior art described above, in the two-layer flow mode of internal and external air, the air supplied to the defroster outlet is supplied by heating external air introduced to the upper side of the casing with a heat exchanger for heating. The air introduced to the upper side of the casing may be merged with the air introduced to the lower side of the casing and supplied. In this case, the switching of the air flow path is performed by opening and closing the foot air outlet by the foot door.

A rotary damper is used as the foot door. A foot door is provided near the airflow direction changing wall that guides the air introduced from the upper side of the casing to the defroster outlet, and blocks the flow of the air introduced from the lower side of the casing to the upper side of the casing when the foot outlet is open. , the air introduced into the lower side of the casing joins the air introduced into the upper side of the casing at the closed position of the foot outlet.

According to such a foot door, when the foot outlet is in the closed position, the confluence point of the air introduced into the lower side of the casing and the air introduced into the upper side of the casing is on the leeward side of the tip of the wind direction changing wall. Become. Therefore, if the tip of the wind direction changing wall is extended to the leeward side and the air introduced to the upper side of the casing is to flow smoothly toward the defroster outlet, the wind direction changing wall extending to the leeward side causes the air flow at the confluence point described above. The passage will be narrowed, and the increase in airflow resistance will make it impossible to obtain a sufficient air volume. Conversely, if the tip of the wind direction changing wall is shifted to the windward side to widen the airflow passage on the leeward side of the tip of the wind direction changing wall to secure the air volume at the confluence point mentioned above, the wind direction due to the wind direction changing wall As a result, the change function deteriorates, and the air introduced to the upper side of the casing cannot flow smoothly toward the defroster outlet.

The present invention is intended to deal with such circumstances, and in a two-layer air-conditioning system for vehicles, the air introduced into one layer of the casing joins the air introduced into the other layer of the casing. SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle air conditioner that can smoothly flow the air introduced into the first layer side of the casing toward the defroster outlet while ensuring the air volume at the location.

In order to solve such problems, the present invention has the following configurations.
A casing containing a heat exchanger is provided, a partition section is provided for partitioning an air flow passage in the casing into a first layer space and a second layer space, a first blowout section is provided on the first layer space side, and the first blow section is provided on the side of the first layer space. A vehicular air conditioner having a second air outlet on the side of a two-layer space, wherein the direction of air flowing through the first layer space is changed toward the first air outlet at a leeward end of the partition. A blowing flow path switching part is provided near the wind direction changing part, and switches whether the air flowing in the second layer space joins the air flowing in the first layer space or flows to the second blowing part. is provided, and the wind direction is changed when the air flowing through the second layer space flows to the second blowing part compared to the case where the air flowing through the second layer space joins the air flowing through the first layer space An air conditioner for a vehicle, wherein a tip position of the portion is moved toward the first layer space in a stacking direction of the first layer space and the second layer space.

According to the vehicle air conditioner having such features, in the two-layer flow type vehicle air conditioner, the air introduced into the first layer space of the casing and the air introduced into the second layer space of the casing The air introduced into the first layer space of the casing can be smoothly flowed toward the first blowout portion while ensuring the air volume at the junction.

1 is an explanatory diagram showing a vehicle air conditioner according to an embodiment of the present invention; FIG. FIG. 2 is an enlarged view of the foot door surrounded by the dashed-dotted line in FIG. 1 ((a) is a state in which the foot outlet is closed, and (b) is a state in which the foot outlet is open). FIG. 2 is an explanatory diagram showing the air blowing state in one operation mode (deflection mode) of the vehicle air conditioner according to the embodiment of the present invention; FIG. 2 is an explanatory diagram showing the air blowing state in one operation mode (foot mode) of the vehicle air conditioner according to the embodiment of the present invention; FIG. 2 is an explanatory diagram showing the air blowing state in one operation mode (vent mode) of the vehicle air conditioner according to the embodiment of the present invention; FIG. 10 is an explanatory diagram showing the air blowing state in one operation mode (deflection mode) of the vehicle air conditioner according to another embodiment of the present invention; FIG. 11 is an explanatory diagram showing a blowing state in one operation mode (foot mode) of a vehicle air conditioner according to another embodiment of the present invention; FIG. 5 is an explanatory diagram showing the air blowing state in one operation mode (vent mode) of a vehicle air conditioner according to another embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different figures denote portions having the same function, and duplication of description in each figure will be omitted as appropriate.

As shown in FIG. 1, the vehicle air conditioner 1 comprises an air intake section 1A and a blown air temperature control section 1B. The air intake unit 1A takes in air outside the vehicle (outside air) and air inside the vehicle (inside air) by a blower (not shown), and sends the air to the blower temperature control unit 1B. The blower temperature control section 1B has a casing 10, and the air intake section 1A introduces outside air or inside air into the casing 10. As shown in FIG. The air intake portion 1A may be provided integrally with the casing or may be provided separately.

The casing 10 in the vehicle air conditioner 1 includes a partition portion 10C that partitions the airflow passage in the casing 10 into a first layer space 10A and a second layer space 10B. The first layer space 10A and the second layer space 10B can be, for example, an upper layer and a lower layer when the vehicle air conditioner 1 is mounted on a vehicle.

The air introduced into the casing 10 by the air intake portion 1A described above is sent to each of the first layer space 10A and the second layer space 10B. As an example, outside air can be introduced into the first layer space 10A and inside air can be introduced into the second layer space 10B. Outside air or inside air may be introduced into both spaces 10B, or inside air may be introduced into the first layer space 10A and outside air may be introduced into the second layer space.

The casing 10 accommodates a heat exchanger for cooling or heating the introduced air. In the illustrated example, the casing 10 accommodates a first heat exchanger 17 and a second heat exchanger 18 . The first heat exchanger 17 is arranged such that the core portion 17A that exchanges heat with the introduced air is located in both the first layer space 10A and the second layer space 10B, and the heat medium is supplied to the core portion 17A. One of the pair of header portions 17B for distribution is arranged in the first layer space 10A, and the other of the pair of head portions 17B is arranged in the second layer space 10B. The first heat exchanger 17 is provided on the windward side with respect to the second heat exchanger 18, and as an example, cools the air introduced into the casing 10 in both the first layer space 10A and the second layer space 10B. function as a cooler (e.g., cooler core).

The second heat exchanger 18 is provided on the leeward side with respect to the first heat exchanger 17, and the illustrated example is a core portion that exchanges heat with the introduced air, similar to the first heat exchanger 17. 18A are positioned in both the first layer space 10A and the second layer space 10B, and one of the pair of header portions 18B for circulating the heat medium to the core portion 18A is disposed in the first layer space 10A. The other of the pair of head portions 18B is arranged in the second layer space 10B. The second heat exchanger 18 functions, for example, as a heater (for example, a heater core) that heats the air introduced into the casing 10 in both the first layer space 10A and the second layer space 10B.

A radiator 19 can be provided on the leeward side of the second heat exchanger 18 as shown in the figure, if necessary. The radiator 19 is, for example, a heat exchanger (condenser) that radiates the heat of the refrigerant in the refrigerant circuit. The cooled air is further heated to a desired temperature and sent to the leeward side. In this example, a core portion 19A of a heat radiator 19, which is a heat exchanger, is arranged so as to straddle both the first layer space 10A and the second layer space 10B, and a header portion 10B of the radiator 19 is arranged in the first layer space 10A. and the second layer space 10B.

The casing 10 of the vehicle air conditioner 1 has a plurality of outlets for blowing out the air that has been introduced into the casing 10 and cooled or heated into the vehicle interior. In the illustrated example, the casing 10 includes a defroster outlet 11 and a vent outlet 12 as a first blowout section provided on the first layer space 10A side, and a front outlet as a second blowout section on the second layer space 10B side. It is equipped with foot outlets 13 on the seat side and rear seat side, and vent outlets on the rear seat side (not shown).

In addition, the casing 10 of the vehicle air conditioner 1 is provided with a blowing channel switching portion 20 for switching the blowing channels of the air introduced into the first layer space 10A and the second layer space 10B. One of the air flow path switching units 20 is a first air mix door 21 provided on the side of the first layer space 10A. Switches whether the air that has passed through is made to flow toward the second heat exchanger 18 or bypasses the second heat exchanger 18. - 特許庁Another one of the air flow path switching units 20 is a second air mix door 22 provided on the side of the second layer space 10B. It switches between flowing the air that has passed through the heat exchanger 17 toward the second heat exchanger 18 or bypassing the second heat exchanger 18. - 特許庁

Further, the casing 10 of the vehicle air conditioner 1 is provided with a foot door 23 that opens and closes the foot outlet 13 serving as the above-described second outlet as the air flow path switching section 20 . The foot door 23 not only opens and closes the foot blower outlet 13, but also allows the air flowing through the second layer space 10B to join the air flowing through the first layer space 10A, or the foot blower outlet 13, which is the second blowing section. It has a function to switch whether it flows or not.

The foot door 23 is provided in the vicinity of the wind direction changing section 14 provided at the leeward end of the partition section 10C. The wind direction changing portion 14 is a bent or curved partition wall for changing the direction of the air flowing through the first floor space 10A toward the first blowout portion (for example, the defroster blowout port 11).

In order to make the vehicle air conditioner 1 compact in the front-rear direction when it is mounted on a vehicle, the first blowout portion (the defroster blowout port 11 and the vent blowout port 12) of the casing 10 is replaced with a heat exchanger (the first heat exchanger 17). and the second heat exchanger 18). Therefore, in order to send the air that has passed through the heat exchanger and is cooled or heated to the first blowout section, it is necessary to greatly bend the air flow path to make the air flow upward. The wind direction changing section 14 described above is provided to correspond to such arrangement of the first blowing section.

FIG. 2 shows the deployment relationship between the foot door 23 and the wind direction changing section 14. FIG. The illustrated foot door 23 is a rotary damper, and swings around a swing shaft 23A to close the foot outlet 13 shown in FIG. 13 is opened.

The foot door 23 includes a pair of sealing portions 23B opened at a predetermined angle and a shielding portion 23C provided therebetween, and forms an air flow path passing through the pair of sealing portions 23B along the shielding portions 23C. Together, it shields the air flow path in the direction perpendicular to the shielding portion 23C. As a result, as shown in FIG. 2(a), when the shielding portion 23C covers the foot air outlet 13, the foot air outlet 13 is closed and the air from the second layer space 10B to the first layer space 10A is blocked. is permitted, and as shown in FIG. Air flow to 10A is blocked.

One side of the pair of sealing portions 23B of the foot door 23 is separated from the wind direction changing portion 14 in the switching state of FIG. It abuts and becomes a state along the extending direction of the wind direction changing part 14 . At this time, the sealing portion 23B that abuts on the airflow direction changing portion 14 is separated from the tip 14a of the airflow direction changing portion 14 by the length t in the first layer space in the stacking direction of the first layer space 10A and the second layer space 10B. It will be in a state of protruding to the 10A side.

According to this, in the state of FIG. 2B, the sealing portion 23B in contact with the airflow direction changing portion 14 also serves as an airflow direction auxiliary plate, so that the airflow direction changing portion 14 is substantially divided into the first layer space 10A and the second layer space 10A. It is in a state of being extended toward the first layer space 10A side in the stacking direction of the space 10 . In other words, the tip position of the wind direction changing portion 14 moves toward the first layer space 10A in the stacking direction of the first layer space 10A and the second layer space 10 . On the other hand, in the state of FIG. 2(a), the sealing portion 23B is separated from the airflow direction changing portion 14, so that the leading end position of the airflow direction changing portion 14 is substantially located between the first layer space 10A and the second layer space 10A. The layer space 10 moves to the second layer space 10B side in the stacking direction, and on the leeward side of the tip of the airflow direction changing part 14, there is a wide blowing flow path for air flowing from the second layer space 10B to the first layer space 10A. is formed.

At this time, when the foot outlet 13 is closed as shown in FIG. 14a is substantially equal to the end position E of the core portion 19A of the radiator 19, which is a heat exchanger, or the stacking direction of the first layer space 10A and the second layer space 10B from the end position E of the core portion 19A. , located on the second layer space 10B side. Due to such a positional relationship, a wide blowing passage is ensured when the air flowing through the second layer space 10B joins the air flowing through the first layer space 10A, and the air flowing through the second layer space 10B is secured at an early stage. joins the air that has passed through the core portion 19A of the first layer space 10A, and the temperature can be adjusted smoothly by mixing the air.

Further, as shown in FIG. 2B, when the foot blower outlet 13 is opened and the air flowing through the second space 10B flows to the foot blower outlet 13, which is the second blower section, the tip of the wind direction changing section 14 The position is moved by the sealing portion 23B of the foot door 23, and the first layer space 10A and the second layer space 10B are separated from the end position E of the core portion 19A of the radiator 19, which is substantially a heat exchanger. It is positioned on the first layer space 10A side in the stacking direction. According to this positional relationship, the air that has passed through the core portion 19A of the first layer space 10A can be reliably guided to the first outlet (for example, the defroster outlet 11).

3 to 5 show the air flow in the casing 10 in each operation mode of the vehicle air conditioner 1 (see thick line arrows in the figure). In FIG. 3, the air flowing through the first layer space 10A and the air flowing through the second layer space 10B are merged on the downstream side of the heat exchangers (the first heat exchanger 17 and the second heat exchanger 18) to form a defroster outlet. 11 shows the differential mode flowing toward 11.

In the differential mode shown in FIG. 3, the air flow path switching unit 20 is in a state where the flow path in which both the first air mix door 21 and the second air mix door 22 bypass the second heat exchanger 18 is closed, and the foot door 23 is a state in which the foot outlet 23 shown in FIG. 2(a) is closed. In this operation mode, the confluence point G of the air flowing through the first layer space 10A and the air flowing through the second layer space 10B is on the leeward side of the tip of the wind direction changing section 14. Positioning the layer space 10A and the second layer space 10 on the side of the second layer space 10B in the stacking direction of the layer space 10A and the second layer space 10 and widening the air flow path at the junction G reduces the ventilation resistance at the junction G, and the defroster outlet 11 It is possible to secure a sufficient amount of air that flows through. In addition, since the air flowing through the first layer space 10A and the air flowing through the second layer space 10B can be mixed early, the temperature of the air blown out from the defroster outlet 11 can be properly adjusted.

FIG. 4 shows that the air flowing in the first layer space 10A is directed downstream of the heat exchangers (the first heat exchanger 17 and the second heat exchanger 18) to the first outlets (the defroster outlet 11 and the vent outlet 12). , and the air flowing through the second layer space 10B flows toward the foot outlet 13 on the downstream side of the heat exchangers (the first heat exchanger 17 and the second heat exchanger 18). .

In the foot mode shown in FIG. 4, the air flow path switching unit 20 is in a state in which the flow paths in which both the first air mix door 21 and the second air mix door 22 bypass the second heat exchanger 18 are closed. The foot door 23 is in a state of opening the foot outlet 13 shown in FIG. 2(b).

In this operation mode, the sealing portion 23B of the foot door 23 abuts against the wind direction changing portion 14, so that the tip of the wind direction changing portion 14 is substantially the same as that of the first layer space 10A. Positioned on the side of the first layer space 10A in the stacking direction of the second layer space 10, the airflow direction changing function of the airflow direction changing unit 14 is exhibited satisfactorily, and the flow of air toward the first blowout unit is made smooth. can be done. In addition, since the air flowing through the second layer space 10B is directed toward the foot air outlet 13 without flowing into the first layer space 10A, the tip position of the wind direction changing portion 14 is substantially the same as that of the first layer space 10A and the second layer space. Even if the air flow path from the second layer space 10A toward the first layer space 10A is narrowed, no problem will occur.

FIG. 5 shows that in both the air flowing through the first layer space 10A and the second layer space 10B, the air that has passed through the first heat exchanger 17 bypasses the second heat exchanger 18 and is vented from the first blowout section. A vent mode in which the air flows toward the outlet 12 is shown.

In the vent mode shown in FIG. 5, the air flow path switching unit 20 has both the first air mix door 21 and the second air mix door 22 in the open state, and the foot door 23 is the foot outlet shown in FIG. 23 is closed. In this mode of operation, air flowing through the first tier space 10A passes through the first heat exchanger 17, then through the open first air mix door 21, directly to the vent outlet 12, and into the second tier space 10B. After passing through the first heat exchanger 17 , the air flows through the second air mix door 22 open and directly to the vent outlet 12 . In this case as well, the flow path of the air from the second layer space 10B to the first layer space 10A can be widened on the leeward side of the wind direction changing section 14, so that the amount of air flowing through the vent outlet 12 can be sufficiently increased. can be secured.

6 to 8 show other configuration examples of the vehicle air conditioner 1. FIG. In this example, the electric heater 31 for auxiliary heating the air heated by the second heat exchanger 30 (the core portion 30A and the header portion 30B) is provided only in the second layer space 10B, and the wind direction changing portion 14 is curved. The tip position of the wind direction changing portion 14 is set to a position substantially equal to the end position of the core portion 30A of the second heat exchanger 30 on the side of the header portion 30B. is similar to the example of In this example, the tip position of the wind direction changing portion 14 is substantially equal to the end position of the core portion 30A of the second heat exchanger 30. However, the present invention is not limited to this. It may be located on the second layer space 10B side in the stacking direction of the first layer space 10A and the second layer space 10B.

Here, the second heat exchanger 18 in the examples of FIGS. 3 to 5 and the second heat exchanger 30 in the examples of FIGS. 6 to 8 can be the heater core of the heat medium circuit or the condenser of the refrigerant circuit. 3 to 5, the condenser of the refrigerant circuit can be used as the radiator 19, and the auxiliary heater in the examples of FIGS. 6 to 8 can be the electric heater 31, as described above. However, for the auxiliary heater in each example, the heater core of the heat medium circuit and the condenser and electric heater of the refrigerant circuit can be selected as appropriate.

Although FIG. 6 shows the differential mode, FIG. 7 shows the foot mode, and FIG. 8 shows the vent mode, the parts similar to those in FIGS. In the examples shown in FIGS. 6 to 8, by curving the wind direction changing part 14, the air flowing in the first layer space 10A is directed to the downstream side of the heat exchangers (the first heat exchanger 17 and the second heat exchanger 18). , the airflow direction is changed along the curve of the airflow direction changing portion 14, so that the air flow toward the first blowout portion can be formed more smoothly. In addition, since a wide airflow passage can be formed on the leeward side of the airflow direction changing section 14, a sufficient amount of air flowing from the second layer space 10B to the first layer space 10A can be ensured.

As described above, in the vehicle air conditioner 1 according to the embodiment of the present invention, the wind direction changing part 14 is provided on the leeward side of the partition part 10C that divides the inside of the casing 10 into the first layer space 10A and the second layer space 10B. , compared to the case where the air flowing through the second layer space 10B joins the air flowing through the first layer space 10A, the air flowing through the second layer space 10B flows into the second outlet (foot outlet 13). On the other hand, the tip position of the wind direction changing portion 14 is located on the leeward side. As a result, the air introduced into the first layer space 10A of the casing 10 can flow smoothly while securing the air volume at the junction of the air introduced into the first layer space 10A and the air introduced into the second layer space 10B. It is possible to directly flow the air toward the first blowout portion (for example, the defroster blowout port 11), and good air blowing performance can be obtained in various operation modes.

Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and design modifications and the like are made within the scope of the present invention. is included in the present invention. In addition, each of the above-described embodiments can be combined by diverting each other's techniques unless there is a particular contradiction or problem in the purpose, configuration, or the like.

1: vehicle air conditioner, 1A: air intake section, 1B: blower temperature control section,
10: casing,
10A: first layer space, 10B: second layer space, 10C: partition,
11: defroster outlet, 12: vent outlet, 13: foot outlet,
14: wind direction changing part, 14a: tip, 15, 16: outlet opening/closing door,
17: first heat exchanger (cooler), 17A: core portion, 17B: header portion,
18, 30: second heat exchanger (heater),
18A, 30A: core part, 18B, 30B: header part,
19: radiator, 19A: core section, 19B: header section,
31: electric heater,
20: air flow path switching unit,
21: first air mix door, 22: second air mix door,
23: foot door, 23A: swing shaft, 23B: sealing portion, 23C: shielding portion,
G: Merging point

Claims (5)

A casing containing a heat exchanger is provided, a partition section is provided for partitioning an air flow passage in the casing into a first layer space and a second layer space, a first blowout section is provided on the first layer space side, and the first blow section is provided on the side of the first layer space. A vehicle air conditioner having a second outlet on the two-layer space side,
A wind direction changing portion for changing the direction of the air flowing in the first layer space toward the first blowout portion is provided at the leeward end of the partition portion,
A blowing flow path switching section is provided near the wind direction changing section for switching whether the air flowing through the second layer space joins the air flowing through the first layer space or flows to the second blowing section,
When the air flowing through the second layer space flows into the second blowing section, compared to the case where the air flowing through the second layer space merges with the air flowing through the first layer space, the tip of the wind direction changing section A vehicular air conditioner, wherein the position is moved to the first layer space side in the stacking direction of the first layer space and the second layer space. When the air flowing through the second layer space joins the air flowing through the first layer space,
The tip position of the wind direction changing part is equal to the end position of the core part of the heat exchanger, or the stacking direction of the first layer space and the second layer space is greater than the end position of the core part of the heat exchanger. 2. The vehicle air conditioner according to claim 1, wherein the air conditioner is located on the side of the second layer space in the . When the air flowing through the second layer space flows to the second blowing section,
A tip position of the wind direction changing part is positioned closer to the first layer space in a stacking direction of the first layer space and the second layer space than an end position of the core part of the heat exchanger. The vehicle air conditioner according to claim 1 or 2. When the air flowing through the second layer space flows to the second blowing section, the air flow path switching section changes the tip position of the airflow direction changing section in the stacking direction of the first layer space and the second layer space. 3. The vehicle air conditioner according to claim 1, further comprising a wind direction auxiliary plate extending toward the first layer space. The first blowout part includes a defroster blowout port,
The second blowout part includes a foot blowout port,
The air flow path switching unit includes a foot door that is a rotary damper,
A sealing portion of the foot door that closes the foot outlet also serves as the wind direction auxiliary plate,
When the foot outlet is closed, the tip of the wind direction changing section is positioned at the end of the core section of the heat exchanger,
When the foot outlet is opened, the end of the sealing portion of the foot door is located on the side of the first layer space in the stacking direction of the first layer space and the second layer space from the end of the core portion of the heat exchanger. 5. A vehicle air conditioner according to claim 4, wherein the air conditioner is positioned

Images