JP4512467B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner having a ventilation path on a front seat side and a rear seat side.

This type of vehicle air conditioner is provided with an evaporator that exchanges heat with air supplied to the passenger compartment, and a heater core, and a plurality of wall outlets that are configured on the downstream side of the evaporator and the heater core. In the vehicle air conditioner that blows the conditioned air that has passed through the evaporator and the heater core from the plurality of wall outlets toward the vehicle interior, the warm air that has passed through the heater core has An auxiliary blower for the rear seat is installed at the entrance of the rear-seat air conditioning passage in the hot air passage communicating with the seat-side region, and air conditioning is performed by one air conditioning unit for the front-seat region and the rear-seat region in the passenger compartment. It is.
JP 2004-161059 A

  However, in the above conventional vehicle air conditioner, the conditioned air branch to the rear seat side air conditioning passage is in the warm air passage that has passed through the heater core, and the front seat side mixing unit depends on whether or not air is supplied to the rear seat side. There is a problem that the mixing ratio of cold air and hot air is easily changed.

  Therefore, the present invention provides a vehicle air conditioner that can stabilize the blowing temperature on the front seat side and make the blowing temperature on the front seat side and the rear seat side uniform, regardless of the air blowing from the rear seat side. The purpose is to do.

The invention according to claim 1 which achieves the above object is cooled by cooling means for cooling the air introduced into the unit case by the main blower, and heating means for heating the air introduced into the unit case. An air mix door that mixes air and heated air at a predetermined ratio; a main air supply path that supplies air adjusted to a predetermined temperature to each air outlet; an auxiliary air supply path; and the main air supply path The first air mix chamber adjacent to the bypass path through which the conditioned air passing through the air mix door bypasses the heating means, the second air mix chamber communicating with the downstream side of the first air mix chamber, and the first A mode door for controlling the opening degree of the communication portion between the air mix chamber and the second air mix chamber; A connecting port of the defroster door and the auxiliary air flow path for controlling the opening of the upper vent door and defroster connection portion for controlling the opening of Appabento connecting portion communicating with the box chamber and an auxiliary blower to the auxiliary air flow path The vehicle air conditioner is characterized in that a throttle portion is provided at the connection port .

  According to a second aspect of the present invention, in the vehicle air conditioner according to the first aspect, the main air blowing path is a front seat side air passage and the auxiliary air passage is a rear seat side air passage.

  A third aspect of the present invention is the vehicle air conditioner according to the first or second aspect, wherein the wall surface faces at least one of the wall surface provided with the main air supply path and the wall surface provided with the auxiliary air supply path. A detour wall is provided toward the front.

According to a fourth aspect of the present invention, in the vehicle air conditioner according to the third aspect, the second air mix chamber (10b) is provided on the downstream side of the bypass wall (10d).

  According to the first aspect of the present invention, when the auxiliary blower is stopped due to the provision of the throttle portion, the conditioned air is not supplied to the auxiliary air passage, and the cooling air and the heated air are sufficiently mixed. Therefore, the temperature of the conditioned air can be made uniform. In addition, when the auxiliary blower is in operation, the cooling air and the heated air are sufficiently mixed so that the temperature of the conditioned air is uniform, so that the conditioned air is supplied to the auxiliary air passage by the auxiliary blower. The temperature of the conditioned air supplied to the main ventilation path and the auxiliary ventilation path can be made uniform.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the blowing temperature on the front seat side and the rear seat side can be made uniform, a comfortable vehicle interior environment can be provided.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, since the air bypassing the heater core and the heated air are mixed while detouring by the bypass wall, the conditioned air is blown out. The temperature can be made more uniform.

  According to the invention of claim 4, in addition to the effect of the invention of claim 3, by providing an air mix chamber on the downstream side of the bypass wall, air can be sufficiently mixed. Can be made uniform.

  Hereinafter, an embodiment of a vehicle air conditioner of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an external shape of a vehicle air-conditioning unit and a rear-seat-side air passage in one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. It is sectional drawing along the BB line.

  In the air conditioning unit 1 of this embodiment, an evaporator 3 as a cooling unit that cools the air introduced into the air passage 6 by the main blower 2 and a heater core 4 as a heating unit that heats the air are unit cases 5. Is placed inside.

  As shown in FIG. 2 and FIG. 3, the main blower 2 supplies the outside air or the inside air to the air passage 6 on the downstream side, and is a multiblade that is rotationally driven by a motor (not shown). A scroll fan (not shown) including a fan and a scroll casing 2a in which the scroll fan is housed and a scroll chamber is formed on the outer periphery of the scroll fan. The end of the scroll chamber is opened, and is formed so as to discharge air to the blower passage 6 on the downstream side.

  The evaporator 3 is located on the downstream side of the air passage 6, and the heater core 4 is disposed in the unit case 5 so as to be located on the downstream side of the evaporator 3 in the air passage 6, and between the evaporator 3 and the heater core 4. Is provided with an air mix door 7. A downstream side of the heater core 4 is a hot air passage 9, and a bypass passage 8 that bypasses the heater core 4 is provided above the hot air passage 9 in parallel with the hot air passage 9.

  The bypass passage 8 is a flow path in which the conditioned air that has passed through the air mix door 7 flows directly downstream without flowing into the heater core 4. A portion adjacent to the bypass passage 8 is an air mix portion 10.

  The air mix door 7 has a door case 7a attached in the unit case 5 and a slide door 7b attached to the door case 7a so as to be slidable. The door case 7a is curved in a circular arc shape on the downstream side, and a door opening is opened on the downstream side of the circular arc shape. The air that has passed through the evaporator 3 passes through the door opening and is supplied to the downstream heater core 4 and / or the bypass passage 8 above the heater core 4.

  The sliding door 7b faces the door opening of the door case 7a, and adjusts the opening area ratio of the door opening by sliding in the vertical direction in the figure along the door case 7a. By adjusting the opening area ratio of the door opening, the air volume passing through each of the heater core 4 and the bypass passage 8 can be adjusted to a predetermined ratio. The sliding of the sliding door 7b is performed by a rack 7c formed on the sliding door 7b and a gear 7d that is attached to the door case 7a and meshes with the rack 7c, and is slid by controlling the rotation of the gear 7d. The sliding amount of the door 7b can be adjusted.

  The air mixing unit 10 mixes the air that has passed through the bypass passage 8 and / or the hot air passage 9, and the mixed air is supplied to a plurality of connection ports 11a, 12a, 13a, 14a, 15a, and 16a provided on the downstream side. To supply. Moreover, the air mix part 10 is comprised from the 1st mix chamber 10a and the 2nd mix chamber 10b as an air mix chamber as FIG. 2 shows, and the 1st mix chamber 10a is located in an upstream, The second mix chamber 10b is located on the downstream side.

  The air mix unit 10 is partitioned into a first mix chamber 10a and a second mix chamber 10b by a detour wall 10d, and the first mix chamber 10a and the second mix chamber 10b communicate with each other through a communication unit 10e. The communication portion 10e is provided with a mode door 10c that controls the opening degree of the communication portion 10e by rotation.

  A foot duct connection port 11a is provided on the downstream side of the first mix chamber 10a. The foot duct connection port 11a is provided along the wall surface forming the warm air passage 9, and the warm air that has not been mixed in the first mix chamber 10a near the wall surface is mixed in the first mix chamber 10a. At the same time, since the air is supplied to the foot duct connecting port 11a, the air-conditioned air slightly warmer than the air-conditioned air blown from the other air outlets is blown to the feet of the passenger. In addition, the foot duct connection port 11a is provided with a foot door 11c that controls the opening degree of the connection port by rotation.

  On the downstream side of the second mix chamber 10b, there is a differential / upper vent duct connecting port 12a communicating with a differential / upper vent duct 12b which is a front seat side air passage as a main air passage, and a rear seat side air flow as an auxiliary air passage. A rear duct connection port 15a communicating with the rear duct 15b, which is a road, is provided. That is, in the second mix chamber 10b, the ventilation path is branched into the differential / upper vent duct 12b and the rear duct 15b.

  The differential / upper vent duct 12b is branched and connected to the defroster duct 13b and the upper vent duct 14b through the defroster connection port 13a and the upper vent connection port 14a, respectively. In addition, the defroster door 13c is arrange | positioned at the defroster connection port 13a, and the upper vent door 14c is arrange | positioned at the upper vent connection port 14a, These doors control the opening degree of each connection part.

  The detour wall 10d that partitions the first mix chamber 10a and the second mix chamber 10b is formed from the lower edge of the foot duct connection port 11a toward the opposing wall surface.

  The vent door 16c is installed in conjunction with the mode door 10c, and controls the opening degree of the vent duct connection port 16a. As shown in FIG. 3, the conditioned air that has passed through the vent duct connection port 16a is supplied to the vehicle interior through the vent duct 16b.

  By having the doors 11c, 13c, 14c, 15c, and 16c as described above, the conditioned air can be independently supplied to the connection ports 11a, 13a, 14a, 15a, and 16a.

  The rear duct connection port 15a is set to have a cross-sectional area smaller than the passage cross-sectional area of the rear duct 15b, and also has a function as a throttle portion.

An auxiliary blower 15d is disposed in the middle of the rear duct 15b.

A door 15c is disposed upstream of the auxiliary fan 15d in the rear duct 15b. The door 15c is closed when only air is blown from the front seat, but when supplied to the rear seat side, the auxiliary blower 15d is operated and the pressure on the downstream side of the upstream side of the door 15c is increased. When the door 15c is lowered, the door 15c is opened, and the conditioned air is supplied to the rear seat side. And the rear duct 15b branches on the downstream side of the auxiliary blower 15d, and is connected to the rear seat outlet through the left and right B pillars from the floor surface in the passenger compartment. Thereby, when supplying from the rear seat outlet, the auxiliary blower 15d forcibly sucks the conditioned air from the unit case 5 into the rear duct 15b and supplies the conditioned air to the left and right rear seat outlets.

  In the embodiment as described above, when the throttle portion 15e is provided, ventilation resistance is increased at the throttle portion 15e, and when the auxiliary blower 15d is stopped due to the provision of the door 15c, the rear duct is provided. Since the conditioned air is not supplied to 15b and the cooling air and the heated air are sufficiently mixed, the temperature of the conditioned air to the front seat side can be made uniform. In addition, when the auxiliary blower 15d is operating, the cooling air and the heated air are sufficiently mixed so that the temperature of the conditioned air is uniform, and the conditioned air is supplied to the rear duct 15b by the auxiliary blower. The temperature of the conditioned air supplied to the front seat side and the rear seat side can be made uniform. And since the blowing temperature of the front seat side and the rear seat side can be made uniform, a comfortable vehicle interior environment can be provided.

  Further, since the air bypassing the heater core and the heated air are mixed while detouring by the detour wall, the temperature of the air-conditioning air can be made more uniform.

  By providing the second mix chamber 10b on the downstream side of the bypass wall 10d, the air can be sufficiently mixed, so that the blowout temperature of the conditioned air can be made more uniform.

  In the vehicle air conditioner of this embodiment, the throttle portion is provided in the rear duct connection port 15a. However, the same effect can be obtained even if the throttle portion is provided in the rear duct 15b.

Further, in this embodiment, the bypass wall 10d is provided from the rear duct connection port 15a side toward the opposing wall, but the same effect can be obtained by providing a bypass wall from the scroll casing 2a side to the rear duct connection port 15a side. Obtainable.

It is a perspective view which shows the vehicle air-conditioning unit external appearance shape in one Embodiment of this invention, and a rear seat side ventilation path. It is sectional drawing along the AA line of FIG. It is sectional drawing along the BB line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Air conditioning unit 2 ... Main blower 3 ... Cooling means 4 ... Heating means 5 ... Unit case 10b ... Air mix chamber 10d ... Detour wall 12b ... Main ventilation path 15b ... Auxiliary ventilation path 15d ... Auxiliary blower 15e ... Restriction part

Claims (4)

A cooling means (3) for cooling air introduced into the unit case (5) by the main blower (2), a heating means (4) for heating the air introduced into the unit case (5), An air mix door (7) that mixes the cooled air and the heated air at a predetermined ratio; and a main air supply path (12b) that supplies air adjusted to a predetermined temperature to each outlet in the vehicle interior. The first air mix chamber (10a) adjacent to the auxiliary air path (15b) and the bypass path where the conditioned air passing through the air mix door (7) bypasses the heating means (4) through the main air path (12b). ), A second air mix chamber (10b) communicating with the downstream side of the first air mix chamber (10a), the first air mix chamber (10a), and the second air mix chamber. A mode door (10c) that controls the degree of opening of the communicating part with the chamber (10b), and the degree of opening of the upper vent connecting part that communicates with the second air mix chamber (10b) on the downstream side of the main ventilation path (12b). The upper vent door (14c) to be controlled, the defroster door (13c) for controlling the opening degree of the defroster connecting portion, the connection port (15a) of the auxiliary air passage (15b), and the auxiliary air fan ( 15d) , a vehicle air conditioner,
A vehicle air conditioner characterized in that a throttle portion (15e) is provided at the connection port (15a) . The vehicle air conditioner according to claim 1,
The vehicle air conditioner characterized in that the main air passage (12b) is a front seat air passage and the auxiliary air passage (15b) is a rear seat air passage. The vehicle air conditioner according to claim 1 or 2,
A detour wall (10d) is provided from at least one of the wall surface provided with the main air supply path (12b) and the wall surface provided with the auxiliary air supply path (15b) toward the opposing wall surface. A vehicle air conditioner. The vehicle air conditioner according to claim 3,
The vehicle air conditioner characterized in that the second air mix chamber (10b) is provided on the downstream side of the bypass wall (10d).

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