JPH0532023U - Automotive air conditioner - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the ventilation resistance of the unit even when the fresh vent is not used, and to secure the specified air flow rate. A cold air passage (14) for an automobile, comprising a cool air passage (14) having an intake unit (4) and a heater unit (13) for guiding the introduced air directly to the vent duct (16) in the heater unit (13). The heater unit communication port 17 communicating with the upstream side of the mix door 9 and the vent duct communication port 18 communicating with the vent duct 16 are opened, and the heater unit communication port 17 and the vent duct communication port 18 are selected. A fresh vent door 15 that is opened and closed is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air conditioner for a vehicle, and more particularly to an improvement of an air conditioner for a vehicle having a fresh vent mode.

[0002]

[Prior Art]

 In recent years, air conditioners for automobiles include, for example, Japanese Utility Model Publication No. 63-4,811, Japanese Utility Model Publication No. 49-146,641, Japanese Utility Model Publication No. 49-146,639, Japanese Patent Application Laid-Open No. 63-270,214 and Japanese Patent Publication No. 63-270,214. As disclosed in Japanese Patent Laid-Open No. 63-270,215, a so-called "air conditioner with a fresh vent mode" has been developed which can supply cold air from a vent duct outlet in any mode.

As shown in FIG. 4, this type of vehicle air conditioner includes an intake unit 4 having an outside air intake 1 and an inside air intake 2, a fan 3 and a motor 19 built-in, and an evaporator 5. The evaporator 5 is passed through a conventional general air conditioner for a vehicle, in which a built-in cooler unit 6 and a heater unit 13 having a heater core 7, a mix door 9, a bypass 8, a mixing chamber 10 and the like are connected. The cold air passage 14 for guiding the cold air directly to the vent duct 16 is provided. Therefore, even in the heat mode or the differential mode in which the vent door 11 is closed, if the fresh vent door 20 that opens and closes the cold air passage 14 is opened, cold air is blown out from the vent grilles 21a and 21b in the vehicle compartment. Therefore, for example, when driving for a long period of time, it can be used in a wide range of ways, such as distributing cool air only to the driver's face to improve comfort during driving.

[0004]

[Problems to be solved by the device]

 However, in the normal blowing mode that does not use the cold air passage, the cold air passage does not perform any function and only invades the space inside the heater unit, which causes a problem that the ventilation resistance of the unit is increased. .. The present invention has been made in view of the above problems of the conventional art, and an object of the present invention is to reduce the ventilation resistance of the unit even when the fresh vent is not used and to secure a predetermined blow-out air volume.

[0005]

[Means for Solving the Problems]

 Means for Solving the Problems The present invention for achieving the above object includes an intake unit (4) having a fan (3) for introducing air from an outside air intake (1) or an inside air intake (2), and the intake unit (4). ) Connected to the downstream side of the heater core (7) for heating the introduced air, a bypass (8) bypassing the heater core (7), and passing through the bypass (8) and the heater core (7), respectively. A mixing door (9) for adjusting the ratio of the amount of air in the mixing door (9), a detour (8) or a mixing chamber (10) for mixing the air passing through the heater core (7) and the mixing chamber (10) are opened. A heater unit (13) having a vent duct outlet (12) connected to a vent duct (16) for distributing air to the upper body of a passenger in a vehicle, and directly introducing the introduced air into the vent duct (16). In a vehicle air conditioner in which a cool air passage (14) for guiding is formed in the heater unit (13), a heater unit communication port () for communicating with the cool air passage (14) upstream of the mix door (9). 17) and a vent duct communication port (18) communicating with the vent duct (16), and a fresh vent for selectively opening and closing the heater unit communication port (17) and the vent duct communication port (18) An air conditioner for a vehicle, characterized in that a door (15) is provided.

[0006]

[Action]

 In the present invention having such a configuration, when the fresh vent door (15) is rotated to the position where the vent duct communication port (18) is opened, the air flowing down from the intake unit (4) is cooled by the cold air passage (14). Also, the cool air can be supplied to the upper body of the occupant regardless of the set temperature by being guided to the vent duct (16) through the vent duct communication port (18). On the other hand, when the fresh vent door (15) is rotated to the position where the heater unit communication port (17) is opened, the air flowing down from the intake unit (4) passes through the cool air passage (14) and the heater unit communication port (17). It is guided to the upstream side of the mix door (9), and is distributed to the heater core (7) or the detour (8) by the mix door (9) and then supplied from the mixing chamber (10) to a predetermined position in the vehicle interior. It As described above, when the fresh vent mode is not used, the cold air passage constitutes a part of the air passage of the heater unit, so that the cold air passage does not increase the ventilation resistance in the unit.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a heater unit according to an embodiment of the present invention, and FIG. 2 is a conceptual view showing an automobile air conditioner of the embodiment, showing a state in which a fresh vent port is opened, FIG. FIG. 3 is a conceptual diagram showing a state where the fresh vent port is also closed.

As shown in FIG. 2, the automobile air conditioner of this embodiment is composed of an intake unit 4, a cooler unit 6, and a heater unit 13. The intake unit 4 is provided with an outside air intake 1 for introducing outside air and an inside air intake 2 for taking in the inside air for circulating the air inside the vehicle. The selection of the intakes 1 and 2 is made by an intake door 22, and a fan 3 and a motor 19 for sending air introduced from either one or both of them are built in.

The cooler unit 6 contains an evaporator 5 connected to a cooling cycle (not shown), and the introduced air is cooled by passing through the evaporator 5. A heater unit 13 is connected to the downstream side of the cooler unit 6 and has a built-in heater core 7 in which engine cooling water and the like circulate. A detour 8 is formed in parallel with the heater unit 7 that does not pass through the heater core 7 and flows down into a mixing chamber 10 described later. The ratio of the amount of air passing through the detour 8 and the heater core 7 is formed. Is adjusted by a mix door 9 rotatably mounted on the upstream side of the heater core 7. The opening of the mix door 9 is adjusted by a temperature adjusting lever provided inside the vehicle compartment. However, the electric signal of a so-called potentio-thermo-controller (commonly known as PTC), an internal air sensor or an external air sensor, which sets a specific temperature by the resistance value, is calculated, and the required blow-out temperature is calculated. You may control the rotation of 9.

A mixing chamber 10 is formed on the downstream side of the heater core 7, and the air conditioned in the mixing chamber 10 has a vent duct outlet 12, a differential duct outlet 19, and a vent duct outlet 12, which are opened in the case of the heater unit 13. The air is selectively blown into the vehicle compartment through the foot duct outlet 23 (see FIG. 1). The differential door and the foot door other than the vent door 11 are not shown. An independent cold air passage 14 is formed on the side wall of the heater unit 13 for introducing the cold air that has passed through the evaporator 5 to the direct vent duct 16 and the cold air passage 14 has a mix door inside the heater unit. A heater unit communication port 17 that communicates with the upstream side of 9 and a vent duct communication port 18 that communicates with the vent duct 16 are provided close to each other. Further, as shown in FIG. 1, a fresh vent door 15 is provided in the cold air passage 14 so that the fresh vent door 15 selectively opens and closes the heater unit communication port 17 and the vent duct communication port 18 described above. Is supported by. Then, when the fresh vent door 15 is rotated to a position where the heater unit communication port 17 is closed and the vent duct communication port 18 is opened as shown in FIG. 1, the fresh vent door 15 is guided into the cold air passage 14. Air is directly guided to the vent duct 16 through the vent duct communication port 18. On the other hand, when the fresh vent door 15 is rotated to the position where the heater unit communication port 17 is opened and the vent duct communication port 18 is closed, the air introduced into the cool air passage 14 is the heater unit communication port. It will be guided to the upstream side of the mix door 9 via 17.

The vent duct 16 is formed so as to extend upward, and is branched from the vent duct 16 into a driver side vent duct 24 and a passenger side vent duct 25. The driver's seat side vent duct 24 and the passenger's seat side vent duct 25 are arranged below the instrument panel in the vehicle compartment, and the center vent outlet 26a provided on the front surface of the instrument panel and the left and right vent ducts. It is connected to the outlet 26b. Therefore, the air blown to the vent duct flows upward through the vent duct 16 and branches to the center and the left and right vent ducts 24 and 25, so that the air is blown to the occupant from the vent duct outlets 26a and 26b in the passenger compartment. The air will be distributed to the half of the body. In this embodiment, the fresh vent door 15 described above is configured to be opened and closed by a fresh vent lever (not shown) mounted in the vehicle compartment.

Next, the operation will be described. Automotive air conditioners have a heat mode that blows warm air to the passengers' feet, a diff mode that blows warm air to the front of the windshield, and warm air or cold air or temperature-controlled air to the upper body of the passenger. The vent mode and the bi-level mode in which warm air is blown from the feet and cold air is blown to the upper body are set.

Here, for example, when it is desired to remove the fog on the inner surface of the windshield while supplying cool air to the occupant, the mode lever is set to the differential mode and the temperature adjusting lever is set to the high temperature side, for example, full hot. Then, operate the fresh vent lever to set the fresh vent mode. As a result, the differential duct outlet 19 is opened, the mix door 9 is rotated to a position that closes the detour, and the fresh vent door 15 is rotated to a position where the heater unit communication port 17 is closed and the vent duct communication port 18 is opened. Move. Then, as shown in FIG. 2, the air flowing down from the intake unit 4 is guided to the vent duct 16 through the cold air passage 14 and the vent duct communication port 18, and the warm air heated by the heater core 7 is blown to the diff duct outlet port 19. Passing through the diff duct (not shown), it is blown toward the windshield, is blown to the upper half of the body of the occupant while clearing the windshield, and the so-called muddy air that occurs on the occupant's head is soothed and comfortable air conditioning is achieved. Is obtained. It should be noted that such an operation can be similarly performed in the other modes, for example, the heat mode and the vent mode.

Next, when the fresh vent mode is released, as shown in FIG. 3, the fresh vent door 15 is rotated to a position where the vent duct communication port 18 is closed and the heater unit communication port 17 is opened. As a result, the air flowing down from the intake unit 4 is guided to the upstream side of the mix door 9 via the cold air passage 14 and the heater unit communication port 17, and the opening state of the mix door 9 determined by the template bar in the vehicle interior causes After being biased to the heater core 7 or the bypass 8, it is supplied from the mixing chamber 10 to a predetermined position in the vehicle interior.

As described above, when the fresh vent mode is not used, the cold air passage 14 constitutes a part of the air passage of the heater unit, so that the cold air passage does not increase the air resistance in the unit. Although the above embodiment has the cooler unit 6, this cooler unit is not always essential, and does not have a cooler unit like the air conditioner for an automobile in which the cooler unit is retrofitted. It can also be applied to things.

[0016]

[Effect of the device]

 As described above, according to the present invention, the heater unit communication port that communicates with the upstream side of the mix door and the vent duct communication port that communicates with the vent duct are opened in the cold air passage, and the heater unit communication port and the vent are also provided. Since a fresh vent door that selectively opens and closes the duct communication port is provided, it is possible to reduce the ventilation resistance of the unit even when the fresh vent is not used, and to ensure a predetermined blow-out air volume.

[Brief description of drawings]

FIG. 1 is a perspective view showing a heater unit according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing an automobile air conditioner of the same embodiment, showing a state where a fresh vent port is opened.

FIG. 3 is a conceptual diagram showing a state in which the fresh vent port is also closed.

FIG. 4 is a conceptual diagram showing a conventional automobile air conditioner.

[Explanation of symbols]

1 ... Outside air intake, 2 ... Inside air intake, 3 ... Fan, 4 ... Intake unit, 7
… Heater core, 8… Detour, 9…
Mix door, 10 ... Mixing chamber, 12
... Vent duct outlet, 13 ... Heater unit, 14 ... Cold air passage, 15 ... Fresh vent door, 16 ... Vent duct,
17 ... heater unit communication port, 18 ... vent duct communication port.

Claims (1)

[Scope of utility model registration request] 1. An intake unit (4) having a fan (3) for introducing air from an outside air intake (1) or an inside air intake (2), and is connected to a downstream side of the intake unit (4). The heater core (7) that heats the introduced air, the detour (8) that detours the heater core (7), and the ratio of the amount of each air that passes through the detour (8) and the heater core (7). Adjusting mix door (9), said detour (8)
Or, a mixing chamber (10) for mixing the air that has passed through the heater core (7) and a vent duct (1) that is provided in the mixing chamber (10) and distributes air to the upper half of the passenger in the passenger compartment.
A heater unit (13) having a vent duct outlet (12) to which 6) is connected, and a cool air passage (14) for guiding the introduced air directly to the vent duct (16) in the heater unit (13). A vehicle air conditioner formed according to claim 1, wherein a heater unit communication port (17) communicating with the upstream side of the mix door (9) and a vent duct communicating with the vent duct (16) in the cold air passage (14). Communication port (1
8) and a fresh vent door (15) for selectively opening and closing the heater unit communication opening (17) and the vent duct communication opening (18) are provided. ..