JP6761691B2 - Vehicle air conditioner - Google Patents

Description

The present invention relates to a vehicle air conditioner that air-conditions a vehicle interior.

Conventionally, vehicle air conditioners have been required to have a defroster function that prevents fogging of the windshield and secures a front view. Therefore, a defroster is provided to blow out the relatively low humidity air conditioning air generated by the air conditioning unit from the air outlet arranged near the windshield.

Various techniques related to such vehicle air conditioners have been proposed (Patent Document 1 and the like).

Here, as shown in FIGS. 9A and 9B, the automobile ventilation device 600 disclosed in Patent Document 1 includes a side differential duct 620 (620a, 620b) extending to the left and right and a side differential duct. A front differential duct 630 provided substantially in the center of the 620, and an air conditioning unit 100 for supplying air conditioning air to the side differential duct 620 and the front differential duct 630 are provided.

Then, in the automobile ventilation device 600, as shown in FIG. 9B, in the air conditioning unit 100, the center line a3 of the air conditioning unit 100 coincides with the center line a3 of the side differential duct 620 and the front differential duct 630. It is arranged in the center so as to.

Japanese Unexamined Patent Publication No. 2003-112520

However, depending on the vehicle type and the like, the position of the air conditioning unit 100 may be offset by a predetermined distance from the center of the side differential duct or the like in either the left or right direction depending on the layout of various parts in the engine room or the like.

That is, in the example shown in FIG. 10, the center line a2 of the air conditioning unit 100 is offset to the right by a distance A with respect to the center line a1 of the side differential duct 620 and the front differential duct 630. In the example shown in FIG. 10, the air conditioning unit 100 has two air conditioning units 100a and 100b divided into two left and right by the center line a2, and the air conditioning air generated by the air conditioning units 100a and 100b has a differential opening. It is configured to be introduced into the front differential duct 630 and the side differential duct 620 via the portions D1a and D1b. Further, the air conditioning winds W1a and W1b from the air conditioning units 100a and 100b are separated by the partition 130.

However, when the air volume of the air conditioning air output from the side differential ducts 620 (620a, 620b) and the front differential duct 630 is measured in the vehicle air conditioner 630 arranged as shown in FIG. 10, the air volume varies. It turned out that there was a problem.

That is, in FIG. 10, when the air volume of the air conditioning air W2a output from the left side differential duct 620a and the air conditioning air W2b output from the right side differential duct 620b are compared, W2a <W2b.

Further, in the front differential duct 630, when the air volume of the air conditioning air W3a output from the left end side and the air conditioning air W3b output from the right end side are compared, W3a> W3b.

Such variations in the air volume of the air conditioning winds W2a, W2b, etc. are caused by offsetting the air conditioning unit 100, so that the air conditioning air from the air conditioning units 100a and 100b in the side differential ducts 620 (620a and 620b) and the front differential duct 630 It is presumed that this is due to the non-uniform pressure in the introduction portions of W1a and W1b and in each duct.

If the air volumes of the air-conditioning winds W2a, W2b, etc. vary in this way, the distribution of the air-conditioning air blown to the windshield and side glass becomes uneven, and there is a problem that the fogging of the windshield and side glass cannot be sufficiently eliminated. ..

Further, when a guide rib or the like is provided at a predetermined position in order to make the air volumes of the air conditioning winds W2a, W2b, etc. uniform, the resistance to the supplied air conditioning air becomes large, causing noise or increasing the internal pressure of the air conditioning unit 100. There was an inconvenience that it changed and affected the air volume and balance of the air conditioning air in the vent mode.

The present invention has been made in view of the above problems, and the air-conditioning air introduced from the air-conditioning unit is equalized in pressure to make the distribution of the air-conditioning air uniform when the air-conditioning unit is arranged at an offset, and the windshield. In an air conditioner that sufficiently eliminates cloudiness such as, etc., suppresses the generation of noise, and has independent left and right temperature control performance, it suppresses the adverse effect on the temperature adjustment function and the left and right air volume balance in the differential foot mode. It is an object of the present invention to provide an air conditioner for a vehicle that can be used.

In order to achieve the above object, the vehicle air conditioner according to the present invention is connected to an air conditioner unit that generates air conditioner air and a differential opening of the air conditioner unit, and air conditioner air from the air conditioner unit is sent to the front seat side of the vehicle. A front differential duct that leads to the front differential outlet located approximately in the center, and a side differential duct that branches to the left and right to guide the air conditioning air to the side differential outlets located on the left and right sides of the front seat of the vehicle. A vacant first unit that equalizes the pressure of the air conditioning air introduced from the air conditioning unit at a position facing at least a part of the differential opening in the middle of the side differential duct in the longitudinal direction. It is characterized in that a pressure equalizing chamber is formed.

According to the present invention, the air conditioning air introduced from the air conditioning unit can be equalized in the vacant first pressure equalizing chamber, and the distribution of the air conditioning air can be distributed when the air conditioning unit is arranged at an offset. In an air conditioner that is uniform, sufficiently eliminates fogging of the windshield, suppresses the generation of noise, and has independent left and right temperature control performance, the temperature adjustment function and left and right air volume balance are achieved in the differential foot mode. It is possible to provide a vehicle air conditioner capable of suppressing the adverse effects of the above.

It is a perspective view which shows the structural example of the instrument panel which arranged the air conditioner for a vehicle which concerns on embodiment. It is explanatory drawing which shows typically the configuration example of the vehicle air-conditioning apparatus which concerns on embodiment. It is a front view which shows the whole structure of the vehicle air-conditioning apparatus which concerns on embodiment. It is a bird's-eye view which shows the main part of the vehicle air-conditioning apparatus which concerns on embodiment. It is a front view which shows the main part of the vehicle air-conditioning apparatus which concerns on embodiment. It is a rear view which shows the main part of the vehicle air-conditioning apparatus which concerns on embodiment. It is a perspective view which shows the lower side of the main part of the vehicle air-conditioning apparatus which concerns on embodiment. It is a perspective view which shows the 2nd pressure equalizing chamber provided in the vehicle air conditioner which concerns on embodiment. It is a perspective view (a) and a partial perspective plan view which shows the schematic structure of the vehicle air-conditioning apparatus which concerns on the prior art. It is explanatory drawing which shows typically the configuration example of the air conditioner for a vehicle which concerns on the prior art.

Hereinafter, embodiments as an example of the present invention will be described in detail with reference to the drawings. Here, in the attached drawings, the same members are designated by the same reference numerals, and duplicate description is omitted. Since the description here is the best mode in which the present invention is carried out, the present invention is not limited to this mode.

[Rough configuration of vehicle air conditioner according to the embodiment]
The configuration and the like of the vehicle air conditioner 1 according to the embodiment will be described with reference to FIGS. 1 and 2.

First, with reference to FIG. 1, the instrument panel 200 on which the vehicle air conditioner 1 according to the present embodiment is arranged will be briefly described.

The vehicle air conditioner 1 of the present embodiment is arranged so as to be located substantially in the center inside the instrument panel 200 located in front of the vehicle interior (not shown in FIG. 1).

Then, the conditioned air generated by the vehicle air conditioner 1 passes through a duct (not shown), the differential outlet 201 formed on the upper surface side of the instrument panel 200, the center vent outlet 202 formed on the front surface side, and the center vent outlet 202. Air-conditioning winds W12 (W12a to W12c), (W21a, W21b), W22 (W22a, W22b), W23 (W23a, W23b) are blown into the vehicle from the side vent outlets 203 and 204 and the front foot outlets (not shown), respectively. Will be done.

Further, the anti-fog outlets 205a and 205b that blow out W11a and W11b through the side vent air distribution ducts connected to the side vent outlets 203 and 204 in the vehicle interior to prevent fogging of the side windows are side vents. It is provided in the vicinity of the air outlets 203 and 204.

Further, although not shown, the conditioned air is blown into the vehicle from the rear seat foot outlet connected via a duct extending to the rear seat side.

(Configuration example of vehicle air conditioner)
Next, a configuration example of the vehicle air conditioner 1 according to the present embodiment will be described with reference to FIG.

FIG. 2 is an explanatory diagram schematically showing a configuration example of the vehicle air conditioner 1 according to the embodiment.

The vehicle air conditioner 1 is connected to an air conditioner unit 10 that generates air conditioner air and differential openings D1a and D1b of the air conditioner unit 10, and the air conditioner air from the air conditioner unit 10 is arranged substantially in the center of the front seat side of the vehicle. The front differential duct 20 leading to the front differential outlet 201 (see FIG. 1) and the side differential outlets 205a and 205b (see FIG. 1) arranged on the left and right sides of the front seat of the vehicle are branched to the left and right to guide the air conditioning air. It is provided with side differential ducts 30 (30a, 30b) to be installed.

Although not shown, the air conditioning unit 10 is a cooling heat exchanger (evaporator) installed inside the air conditioning case to cool and dehumidify the air conditioning air flowing through the air passage, and a heating unit for heating the air conditioning air. It is equipped with a heat exchanger (heater core) and the like.

Then, the vehicle air conditioner 1 faces at least a part of the differential openings D1a and D1b (in the example shown in FIG. 2, the right side portion of the differential opening D1b) in the middle of the side differential duct 30 in the longitudinal direction. A vacant first pressure equalizing chamber C1 for equalizing the pressure of the air conditioning winds W1a and W1b introduced from the air conditioning unit 10 is formed at such a position.

The cross-sectional area of the first pressure equalizing chamber C1 may be formed to be larger than the cross-sectional area of the side differential duct 30. As a result, it is possible to more effectively equalize the air distribution to the side differential ducts 30 (30a, 30b). A specific example of the first pressure equalizing chamber C1 will be described later.

Further, between the side differential duct 30 and the differential openings D1a and D1b of the air conditioning unit 10, a second vacant room that performs primary pressure equalization of the air conditioning air W1a and W1b introduced from the air conditioning unit 10. A pressure equalizing chamber C2 is provided. A specific example of the second pressure equalizing chamber C2 will be described later.

Here, as shown in FIG. 2, in the vehicle air conditioner 1, the center line a2 of the air conditioner unit 10 is offset to the right by a predetermined distance A with respect to the center line a1 of the front differential duct 20 and the side differential duct 30. Have been placed.

Depending on the vehicle type, etc., the position of the air conditioning unit 10 may be offset by a predetermined distance from the center of the side differential duct 30 or the like by a predetermined distance depending on the layout of various parts in the engine room, etc. This is to meet the desire to increase the number of people.

In the example shown in FIG. 2, the distance A is offset to the right side, but the present invention is not limited to this, and the offset may be to the left side or the offset distance may be arbitrary.

A first pressure equalizing chamber C1 is formed on the side where the air conditioning unit 10 is offset (on the right side in the example shown in FIG. 2).

Further, in FIG. 2, the air conditioning unit 10 has two air conditioning units 10a and 10b divided into two left and right by the center line a2. The air-conditioning winds W1a and W1b generated by the air-conditioning units 10a and 10b are configured to be introduced into the front differential duct 20 and the side differential duct 30 via the differential openings D1a and D1b.

According to the vehicle air conditioner 1 having such a configuration, the air conditioning winds W1a and W1b generated by the air conditioning units 10a and 10b are first supplied to the second pressure equalizing chamber C2 and then supplied to the second pressure equalizing chamber C2. In the space of C2, at least a part of the dynamic pressures of the air conditioning winds W1a and W1b are converted into static pressures, and the primary pressure equalization of the air conditioning winds W1a and W1b is performed.

Next, the air conditioning air W2 is supplied to the front differential duct 20 from a part of the opening on the upper end side of the second pressure equalizing chamber C2. At this time, the air-conditioning wind W2 flows in the front differential duct 20 as a rectifier having only an upward vector component due to the pressure equalization by the second pressure equalizing chamber C2. As a result, the air volumes of the air conditioning air W12a and W12b output from the left and right ends of the front differential duct 20 can be made substantially the same (W12a≈W12b).

On the other hand, air-conditioning air W10a and W10b are supplied from a part of the opening on the upper end side of the second pressure equalizing chamber C2 (on the right end side in FIG. 2) to the first pressure equalizing chamber C1.

At this time, the air-conditioning winds W10a and W10b form a turbulent flow by colliding with the inner wall of the first pressure equalizing chamber C1 and the like, and after the dynamic pressures of the air-conditioning winds W10a and W10b are converted into static pressure, The air is distributed to the side differential ducts 30a and 30b branched to the left and right. As a result, the air volume of the air conditioning air W11a and W11b output from each end of the side differential ducts 30a and 30b can be made substantially the same (W11a≈W11b).

As described above, according to the vehicle air conditioner 1, the air volume of the air conditioner winds W11a and W11b output from the side differential ducts 30a and 30b, and the air conditioner winds W12a and W12b output from the left and right ends of the front differential duct 20. The air volume can be made substantially the same.

Therefore, even when the air conditioning unit 10 is arranged at an offset, the distribution of the air conditioning air can be made uniform, and the fogging of the windshield and the side glass can be sufficiently eliminated.

Further, unlike the conventional method, it is not necessary to provide a guide rib or the like at a predetermined position in order to make the air volume of each air conditioning air uniform, so that it is possible to avoid an increase in resistance to the air conditioning air to be sent, causing noise or air conditioning. It is possible to avoid a situation in which the internal pressure of the unit 10 changes, which affects the air volume and balance of the conditioned air such as in the vent mode.

Although not particularly limited, the ratio of the width B1 of the first pressure equalizing chamber C1 to the width B2 of the lower end portion of the front differential duct 20 may be 2: 8.

Further, when the main purpose is to make the air volumes of the air conditioning air W12a and W12b output from the left and right ends of the front differential duct 20 uniform, the second pressure equalizing chamber C2 can be omitted.

Further, FIG. 2 shows a case where the air conditioning unit 10 is divided into two left and right along the center line a2 and has two air conditioning units 10a and 10b, but the present invention is not limited to this, and the configuration has one air conditioning unit. It can also be applied to.

(About specific examples)
A specific example of the vehicle air conditioner 1 according to the present embodiment will be described with reference to FIGS. 3 to 8.

FIG. 3 is a front view showing the overall configuration of the vehicle air conditioner 1 according to the embodiment, and FIG. 4 is a bird's-eye view showing a main part of the vehicle air conditioner 1 according to the embodiment.

Further, FIG. 5 is a front view showing a resin molded product 40 as a main part of the vehicle air conditioner 1 according to the embodiment, FIG. 6 is a rear view thereof, and FIG. 7 is a perspective view.

Note that the same components as those of the constituent members shown in the schematic explanatory view of FIG. 2 are designated by the same reference numerals, and detailed description of the functions and the like will be omitted.

In the vehicle air conditioner 1, a vacant (hollow) resin molded product 50 constituting the second pressure equalizing chamber C2 is placed on the upper end of the resin air conditioning case 15 constituting the air conditioning unit 10. Is fixed.

On the second pressure equalizing chamber C2, a resin molded product 40 in which the front differential duct 20, the side differential ducts 30 (30a, 30b) and the vacant first pressure equalizing chamber C1 are integrally molded is placed. It is placed and fixed.

The resin molded product 40 may be divided in the longitudinal direction or the like for convenience of resin molding or the like.

Further, the first pressure equalizing chamber C1 is formed in a bottomless box shape including an upper wall portion C1a and wall portions C1b, C1cC1e and the like surrounding the four sides, and penetrates the left and right wall portions C1b and C1c to the left and right. Side differential ducts 30a and 30b are integrally provided.

Further, as shown in FIG. 7 and the like, an opening C1A for introducing air conditioning air from the air conditioning unit 10 is opened below the first pressure equalizing chamber C1.

Further, an opening 20d on the front differential duct 20 side is formed across a partition 18 provided adjacent to the opening C1A. Further, as shown in FIG. 4 and the like, an opening 20c for outputting air conditioning air is formed above the front differential duct 20.

FIG. 8 is a perspective view showing a resin molded product 50 constituting a second pressure equalizing chamber C2 included in the vehicle air conditioner 1 according to the embodiment.

A flange portion 50a connected to the upper end portion of the air conditioning unit 10 is formed on the lower end side of the resin molded product 50 constituting the second pressure equalizing chamber C2.

Further, the upper end side of the resin molded product 50 is in close contact with the lower end portion of the resin molded product 40 forming the front differential duct 20, the side differential ducts 30 (30a, 30b) and the vacant first pressure equalizing chamber C1. An elastic material 50b such as urethane is attached.

According to the vehicle air conditioner 1 having the above-described configuration, the air conditioning air introduced from the air conditioning unit 10 can be equalized in the vacant first pressure equalizing chamber C1.

Further, when the air conditioning unit 10 is arranged at an offset, the distribution of the air conditioning air can be made uniform, and fogging of the windshield and the like can be sufficiently eliminated.

Further, in an air conditioner that suppresses the generation of noise and has independent left and right temperature control performance, it is possible to suppress an adverse effect on the temperature adjustment function and the left and right air volume balance in the differential foot mode.

Although the invention made by the present inventor has been specifically described above based on the embodiments, the embodiments disclosed in the present specification are exemplary in all respects and are not limited to the disclosed technology. Should be considered not. That is, the technical scope of the present invention is not limitedly interpreted based on the description in the above-described embodiment, but should be interpreted according to the description of the claims, and the scope of claims. Includes all modifications within the scope of the claims and claims as well as the techniques described in.

1 ... Vehicle air conditioner C1 ... First pressure equalizing chamber C2 ... Second pressure equalizing chamber D1a, D1b ... Diff opening 10 ... Air conditioning unit 10a, 10b ... Air conditioning unit 20 ... Front differential duct 30 (30a, 30b) … Side differential duct

Claims (4)

An air conditioning unit (10) that generates air conditioning air and
A front differential duct (20) that is connected to the differential openings (D1a, D1b) of the air conditioning unit and guides the air conditioning air from the air conditioning unit to the front differential outlet (201) arranged substantially in the center of the front seat side of the vehicle. When,
Side differential ducts (30a, 30b) that are branched to the left and right to guide the air conditioning air to the side differential outlets (205a, 205b) arranged on the left and right sides of the front seat of the vehicle, and
With
The center line (a2) of the air conditioning unit is offset from the center line (a1) of the side differential duct by a predetermined distance (A) to the left side or the right side, and is in the middle of the longitudinal direction of the side differential duct. A vacant room that equalizes the pressure of the air conditioning air (W1a, W1b) introduced from the air conditioning unit at a position facing at least a part of the duct opening on the side where the air conditioning unit is offset. A first pressure equalizing chamber (C1) having a shape is formed, and air conditioning air pressure equalized is sent from the first pressure equalizing chamber (C1) to the side differential duct extending to the left and right. A characteristic vehicle air conditioner. Between the side differential duct and the differential opening of the air conditioning unit,
A vacant second pressure equalizing chamber (C2) for performing primary pressure equalizing of the air conditioning air (W1a, W1b) introduced from the air conditioning unit is provided, and the second pressure equalizing chamber (C2) is provided. The vehicle according to claim 1, wherein two openings are formed from the above, one is an opening to the first chamber, and the other is an opening for sending air conditioning air to the front differential port. Air conditioner for. The vehicle air conditioner according to claim 1 or 2, wherein the cross section of the first pressure equalizing chamber is formed to be larger than the cross section of the side differential duct. The air conditioning unit has two air conditioning units (10a, 10b) divided into two left and right by the center line (a2), and the air conditioning air generated by each air conditioning unit is the differential opening (D1a, D1b). The vehicle air conditioner according to any one of claims 1 to 3, wherein the air conditioner is configured to be introduced into the front differential duct and the side differential duct via the above.

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