JP2008018762A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress an air-conditioned wind blown out of a first air conditioner toward a second air conditioner from being heated by a ceiling heat to improve the blower performance of a cross-flow fan. <P>SOLUTION: In the air conditioner 20 disposed on the ceiling of a vehicle, the air conditioning of a rear seat side area in a cabin is performed by sucking the air-conditioned wind blown out of the air conditioner for the front seat for performing the air conditioning of the front seat side area at least in the cabin by discharging the air-conditioned wind from the vehicle front side toward the front seat from a suction opening 22 into a case 24 through the cross-flow fan 21, and the air conditioning of the rear seat side area in the cabin is performed by blowing out the air-conditioned wind from a blow-out opening 23 to the outside of the case 24. The suction opening 22 is disposed immediately under part of the cross-flow fan 21 on the under surface 24b of at least case 24, and the blow-out opening 23 is disposed further at the part of the vehicle rear side from the cross-flow fan 21 of the case 24 so that the air-conditioned wind is sucked from the lower side with respect to the cross-flow fan 21. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner installed on a ceiling of a vehicle using a cross-flow fan.

  FIG. 6 shows a vehicle mounting diagram of a conventional vehicle air conditioner. As shown in FIG. 6, for example, a first air conditioner 10 that performs air conditioning of at least a front seat side region in the vehicle interior is installed in the instrument panel 1, and a second air conditioner 20 that performs air conditioning of the rear seat side region of the vehicle interior. There is a vehicle air conditioner installed on the ceiling 2 of the vehicle.

  The first air conditioner 10 has an air outlet 11 installed above the instrument panel 1, and blows air conditioned air from the air outlet 11 toward the front seat 3. The conditioned air blown out from the first air conditioner 10 is sucked and the conditioned air is blown out toward the rear seat 4. Thereby, in the vehicle air conditioner shown in FIG. 6, a continuous air flow from the instrument panel 1 through the lower surface of the ceiling 2 to the rear window is realized (for example, see Patent Document 1).

  Further, the second air conditioner has a cross flow fan having a horizontal axis of rotation, and a case that houses the cross flow fan and is provided with an air suction port and a blowout port. In Reference 1, in FIGS. 2 (A) and 2 (B), the suction port is provided on the side surface of the case on the vehicle front side, and in FIG. 2 (C), the suction port is provided on the lower surface of the case. It is shown.

However, in the air conditioner shown in FIGS. 2A, 2B, and 2C of Patent Document 1, the air suction port is located on the front side of the vehicle with respect to the cross flow fan, and the air blowout port. Is located on the vehicle rear side of the cross flow fan.
Japanese Patent Publication No.7-115579 (FIGS. 2 and 8)

  In the second air conditioner described above, as shown in FIGS. 2 (A) and 2 (B) of Patent Document 1, when the suction port is provided on the side surface of the case on the front side of the vehicle, the second air conditioner blows out from the first air conditioner. Since the conditioned air to be flown flows near the ceiling 2, there is a problem that the conditioned air is heated by the heat of the ceiling 2 before being sucked into the second air conditioner.

  In addition, as shown in FIGS. 2A, 2B, and 2C of Patent Document 1, when the air suction port is located on the vehicle front side with respect to the cross flow fan, the cross direction is transverse to the cross flow fan. Since the wind was sucked from (horizontal direction), the blower performance of the cross flow fan was not sufficiently drawn out.

  In view of the above points, the present invention can suppress the conditioned air blown from the first air conditioner toward the second air conditioner from being heated by the ceiling heat, and improve the blower performance of the crossflow fan. An object of the present invention is to provide a vehicle air conditioner that can be used.

  In order to achieve the above object, according to the present invention, the suction port is located at least directly below the cross flow fan on the lower surface (24b) of the case so that the conditioned air is sucked into the cross flow fan from below. It is characterized by being.

  In the present invention, the air inlet supplied from the air conditioner (first air conditioner) that air-conditions the front seat side area is provided from the lower side of the apparatus body because the suction port is provided on the lower surface of the case. The flow of the conditioned air supplied from the air conditioner (first air conditioner) that air-conditions the front seat area can be separated from the ceiling. As a result, the conditioned air can be suppressed from being heated by the ceiling heat.

  Further, in the present invention, the suction port is provided at least directly below the cross flow fan on the lower surface of the case, and the blowout port is provided on the rear side of the case with respect to the cross flow fan of the case. On the other hand, the conditioned air can be introduced from below and discharged from the crossflow fan toward the rear of the vehicle. Thereby, since a wind will flow through the crossflow fan longer than before, the blower performance of the crossflow fan can be improved.

  The invention according to claim 1 includes the first air conditioner as the invention specifying matter, and the invention according to claim 2 does not include the first air conditioner as the invention specifying matter.

  As for the position of the suction port (22), for example, the end portion (22a) on the vehicle rear side of the suction port (22) is on the vehicle rear side with respect to the rotating shaft (21a) of the cross flow fan (21). It is preferable that it is located in. This is because the distance of the wind flowing through the cross flow fan can be increased and the blower performance can be further improved as compared with the case where the cross flow fan is positioned on the vehicle front side with respect to the rotational axis of the cross flow fan.

  Moreover, as for a suction inlet (22), it is preferable that the edge part (22b) of the vehicle front side is located in the side surface (24c) of the vehicle front side of a case (24), for example.

  As a result, while the conditioned air is mainly introduced into the cross flow fan from below, the conditioned air can be introduced into the cross flow fan from the front side of the vehicle as a secondary flow, thereby improving the blower performance. Because it can. Even in this case, since the main flow flows into the cross flow fan from below, an increase in temperature can be suppressed.

  Further, for example, the configuration of the vehicle air conditioner is configured such that the Peltier element (31) disposed on the downstream side of the air flow of the cross flow fan (24) in the interior of the case (24) and the Peltier element in the interior of the case. Provided on the downstream side of the air flow of the Peltier element, and the first passage (32a) for guiding the air cooled by the Peltier element to the outlet (23) and the inside of the case on the downstream side of the air flow of the Peltier element. The second passage (32b) for guiding the air that has absorbed the exhaust heat of the Peltier element to the outside of the passenger compartment can also be provided.

  In addition, the code | symbol in the bracket | parenthesis of each means described in the claim and this column is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

(First embodiment)
FIG. 1 shows a vehicle mounting diagram of a vehicle air conditioner according to a first embodiment of the present invention. Note that components similar to those in FIG. 6 are denoted by the same reference numerals as in FIG.

  As shown in FIG. 1, the vehicle air conditioner of the present embodiment is at least a front seat (seat in the first row) 3 side region in the vehicle interior, similarly to the conventional vehicle air conditioner described in the background art section. A first air conditioner 10 that performs air conditioning is arranged in the instrument panel 1, and a second air conditioner 20 that performs air conditioning of at least a rear seat (second row or third row seat) 4 side region of the vehicle interior is a ceiling. 2 is installed.

  In the present embodiment, the air outlet 11 of the first air conditioner 10 is provided in the upper part of the instrument panel 1 so that conditioned air can be supplied toward the suction port of the second air conditioner 20.

  The 1st air conditioner 10 comprises the refrigerating-cycle system using a refrigerant | coolant with the evaporator arrange | positioned in the 1st air conditioner which is not shown in figure, the compressor arrange | positioned in an engine room, etc., for example. The vehicle interior air or the vehicle exterior air sucked into the first air conditioner 10 is cooled, and the conditioned air is blown out from the outlet 11.

  In the present embodiment, the second air conditioner 20 has a suction port at least on the lower side and a blowout port on the rear side of the vehicle when mounted on the vehicle. Hereinafter, the detail of the 2nd air conditioner 20 is demonstrated. In FIG. 2, sectional drawing of the 2nd air conditioner 20 in this embodiment is shown.

  As shown in FIG. 2, the second air conditioner 20 accommodates the cross flow fan 21 having the rotation axis 21 a in the horizontal direction in a vehicle-mounted state, the cross flow fan 21, and an air inlet 22 and an air outlet. And a case 24 provided with 23.

  The cross flow fan 21 is composed of an impeller (not shown), and is a fan that flows in air from one side of the outer periphery of the impeller, flows back through the impeller, and flows out from the other side of the impeller. is there. The cross flow fan 21 sucks the conditioned air blown from the first air conditioner 10 into the case 24 through the suction port 22 and blows it out of the case 24 through the blowout port 23. As described above, since the second air conditioner 20 uses the conditioned air of the first air conditioner 10, it is compared with a case where the air near the vehicle ceiling is simply sucked when the operation of the first air conditioner 10 is stopped. And the blowing temperature from the 2nd air conditioner 10 can be lowered | hung.

  The case 24 has an upper surface 24a, a lower surface 24b, a vehicle front side surface 24c (hereinafter referred to as a front side surface 24c), and a vehicle rear side surface 24d (hereinafter referred to as a rear side surface 24d). The lower surface 24b and the front side surface 24c are curved in the vicinity of the boundary and are continuous surfaces. The lower surface 24 b of the case 24 means a surface located below the case 24.

  The case 24 is provided with a stabilizer 25. The stabilizer 25 divides the suction port 22 and the blowout port 23 in the case 24, and stabilizes the flow of the suction air by stabilizing the circulating vortex generated inside the cross flow fan 21. In the present embodiment, the stabilizer 25 is located between the lower end of the rear side surface 24d and the lower surface 24b of the case 24, and has a shape extending from the lower end of the rear side surface 24d toward the cross flow fan 21 in the case 24. In the present embodiment, the stabilizer 25 is located on the vehicle rear side (the outlet 23 side) with respect to the rotating shaft 21a of the cross flow fan 21 (the lowest end of the cross flow fan 21).

  In the present embodiment, the suction port 22 is provided in the entire area of the lower surface 24b and the front side surface 24c of the case 24. More specifically, the end 22a on the vehicle rear side of the suction port 22 is located at the intersection of the stabilizer 25 and the lower surface 24b of the case 24, and the fan rotation shaft 21a and the fan outer diameter (fan outermost periphery). ) It is located on the vehicle rear side from the lower surface projection position when 21b is projected onto the lower surface 24b in the vertical direction. Further, an end 22b on the vehicle front side of the suction port 22 is located at the intersection of the front side surface 24c and the upper surface 24a of the case 24, and is located on the vehicle front side with respect to the fan outer diameter 21b.

  Further, the blow-out port 23 is provided on the rear side surface 24 d and is located on the vehicle rear side with respect to the cross flow fan 21.

  Thus, in the present embodiment, the suction port 22 is formed from the intersection of the stabilizer 25 and the lower surface 24b of the case 24 to the front side surface 24c on the front side of the vehicle, and on the lower surface 24b of the case 24. It is formed at a position including the whole area of the vertical projection portion of the fan outer diameter 21b, that is, the portion directly below the fan outer diameter 21b.

  Therefore, as shown in FIG. 2, as the main flow of the air flowing through the second air conditioner 20, the conditioned air from the outlet 11 of the first air conditioner 10 enters the cross flow fan 21 from below, and the inside of the fan The air-conditioning wind flow discharged from the cross flow fan 21 is formed toward the rear of the vehicle.

  Further, since the suction port 22 is also provided on the front side surface 24c, although not shown, the conditioned air flow enters the cross flow fan 21 from the horizontal direction with respect to the cross flow fan 21 as a side flow. Is also formed.

  The suction port 22 is divided into a plurality of suction holes by the suction grille 24e, and the blowout port 23 is also divided into a plurality of blowout holes by the blowout grill 24f.

  Next, main features of the present embodiment will be described.

  (1) In this embodiment, the suction port 22 of the second air conditioner 20 is provided in the lower surface 24b of the case 24 so that the conditioned air supplied from the first air conditioner 10 is sucked from the lower side of the apparatus main body. Yes.

  Therefore, according to this embodiment, the flow of the conditioned air supplied from the first air conditioner 10 can be separated from the ceiling, as can be seen by comparing FIG. 1 and FIG. Thereby, before the 2nd air conditioner 20 inhales, it can suppress that an air conditioning wind is warmed by ceiling heat. As a result, compared with the conventional second air conditioner as shown in FIG. 6, the blowing temperature of the second air conditioner 20 can be lowered, and the comfort in the rear seat 4 can be improved.

  (2) In the present embodiment, the suction port 22 of the second air conditioner 20 is provided at a position including the entire region directly below the fan outer diameter 21b on the lower surface 24b of the case 24, and the air outlet 23 is provided on the rear side surface 24d of the case 24. Provided.

  Thereby, the conditioned air can be introduced into the cross flow fan 21 from below, and the conditioned air can be discharged from the cross flow fan 21 toward the right lateral direction (rear of the vehicle) in the figure. At this time, as shown in FIG. 2, the main stream is pulled by the circulating vortex and flows so as to draw an arc having a central angle of 270 degrees or more in the cross flow fan. Compared with the case where the conditioned air is introduced and discharged (see FIG. 2A of Patent Document 1), the conditioned air flows through the cross flow fan 21 for a long distance. Blower performance can be improved. That is, the amount of blown air can be increased and noise can be reduced.

Here, as a reference, FIG. 3 shows the fan characteristic curves in the present embodiment and the comparative example, and FIGS. 4A to 4C show the positions of the suction ports in the present embodiment and the comparative example. FIG. 3 shows the blower performance measured by the test method specified by JIS, with the vertical axis representing the pressure coefficient ψ and the horizontal axis representing the flow coefficient φ. The pressure coefficient ψ is obtained by making the pressure increase dimensionless by the circumferential kinetic energy given to the flow rate per unit weight of the fan outer periphery by the fan. It is made dimensionless by a value multiplied by the wind speed of the fan outer peripheral part, and is expressed by the following equation.
ψ = ΔP / {(ρ / 2) (πD ₂ N / 60) ² }
φ = (Va / 3600) / (π / 4) D ₂ ² (πD ₂ N / 60)
Here, ΔP: blower pressure (Pa), ρ: / air density (kg / m ³ ), D ₂ : fan outer diameter (m), N: rotational speed (rpm), Va: air volume (m ³ / h) ).

  (A) in FIG. 3 is the blower performance in the present embodiment. As shown in FIG. 4 (a), the suction port 22 is arranged in the cross flow fan 21 so that air flows into the cross flow fan 21 from below. It is a measurement result when arrange | positioning from the part right under to the side part.

  Also, (B) in FIG. 3 is the blower performance in Comparative Example 1 of the present embodiment, and as shown in FIG. 4 (b), the air flows into the cross flow fan 21 from obliquely below. 4A, the stabilizer 25 is extended by a certain width along the fan on the front side of the vehicle (left side in the figure), and the end 22b of the suction port 22 on the front side of the vehicle is moved upward. It is a measurement result at the time.

  Further, (C) in FIG. 3 is the blower performance in the comparative example 2 of the present embodiment, and as shown in FIG. 4 (c), as shown in FIG. With respect to the layout B shown in (b), the measurement results when the end 22a of the suction port 22 on the vehicle rear side is moved to the front side of the vehicle (left side in the figure) and the suction port 22 is separated from the stabilizer 25. is there.

  3A to 3C, air is discharged from the cross flow fan 21 in the horizontal direction (right lateral direction in FIG. 4), and then the air flows downward.

  As shown in FIG. 3, in the fan characteristic curve, (A) is located at the top and (C) is located at the bottom. From this, it can be said that as the position of the suction port 22 is located just below the cross flow fan 21, the blower performance is higher than when the suction port 22 is located beside the cross flow fan 21.

(Second Embodiment)
In FIG. 5, sectional drawing of the 2nd air conditioner in this embodiment is shown. In FIG. 5, the same components as those in FIG. 2 are denoted by the same reference numerals as those in FIG. Below, a different point from 1st Embodiment is demonstrated.

  This embodiment is mainly different from the first embodiment in that the shape of the stabilizer 25 in the second air conditioner 20, the position of the end 22a on the vehicle rear side of the suction port 22, and the Peltier element 31 are included.

  That is, in this embodiment, as shown in FIG. 5, the shape of the stabilizer 25 includes a portion 25 a extending from the lower surface 24 b of the case 24 toward the cross flow fan 21, and the cross flow fan 21 from the fan side end. And a portion (surface) 25b extending a certain distance along the surface. Thus, the shape of the stabilizer 25 can be arbitrarily changed.

  The suction port 22 is located on the vehicle front side with respect to the stabilizer 25, and the vehicle rear side end 22 a is at the intersection of the vehicle front side end of the stabilizer 25 and the lower surface 24 b of the case 24. positioned. In the present embodiment, the end portion 22a on the vehicle rear side is located on the vehicle front side with respect to the fan rotation shaft 21a, and the suction port 22 is a part of a portion directly below the fan outer diameter 21b on the lower surface 24b of the case 24. It is formed in the position containing.

  In this way, if the suction port 22 is located at least somewhere in the region directly below the cross flow fan 21 (vertical projection surface of the fan outer diameter), the rotary shaft 21a is placed on the lower surface 24b of the case 24 in the vertical direction. The suction port 22 may be positioned on the front side of the vehicle with respect to the position projected at. Note that the blower performance in this embodiment corresponds to (B) in FIG. From this, it can be said that this embodiment can also improve the blower performance of the crossflow fan 21 as compared with the case where the airflow is supplied and discharged in the horizontal direction with respect to the crossflow fan.

  Further, in the present embodiment, as shown in FIG. 5, a Peltier element 31 is disposed inside the case 24 on the downstream side of the air flow of the cross flow fan 21. Then, the passage provided on the downstream side of the air flow of the Peltier element 31 inside the case 24 is divided into two in the vertical direction, so that the air cooled by the cooling part 31a of the Peltier element 31 is guided to the outlet 23. A lower passage 32a as a passage and an upper passage 32b as a second passage for guiding the air that has absorbed the exhaust heat of the Peltier element to the outside of the passenger compartment by passing through the heat generating portion 31b of the Peltier element 31 are provided. Yes. The upper passage 32 communicates with a duct (not shown) through an opening 33 provided on the upper surface 24a of the case 24. This duct is provided, for example, in the ceiling material of the vehicle or on the ceiling surface.

  Thereby, in the 2nd air conditioner 20 of this embodiment, a part of discharge air from the crossflow fan 21 is cooled by passing the cooling part 31a of the Peltier device 31, and is ventilated into a vehicle interior. On the other hand, the remainder of the discharge air from the cross flow fan 21 passes through the heat generating part 31b of the Peltier element 31, so that the exhaust heat is absorbed and discharged outside the vehicle compartment through the duct. In this way, it is also possible to lower the blowing temperature of the second air conditioner 20.

  In the present embodiment, the example in which the Peltier element 31 is arranged on the downstream side of the air flow of the cross flow fan has been described, but a heat exchanger or the like may be arranged instead of the Peltier element 31.

(Other embodiments)
(1) In each of the above-described embodiments, in the second air conditioner 20, the case where the end 22b on the vehicle front side of the suction port 22 is located on the front side surface 24c of the case 24 has been described as an example. An end 22 b of the mouth 22 on the vehicle front side may be positioned on the lower surface 24 b of the case 24. That is, if the conditioned air can be introduced into the cross flow fan from below, the suction port 22 can be provided only on the lower surface 24 c of the case 24. At this time, the suction port 22 is positioned at least somewhere in the region directly below the cross flow fan 21 (the vertical projection surface of the fan outer diameter).

  However, as in the above-described embodiment, it is preferable to provide the suction port 22 from the portion directly below the cross flow fan on the lower surface (24b) of the case 24 to the front side surface 24c. As a result, while the conditioned air is mainly introduced into the cross flow fan from below, the conditioned air can be introduced into the cross flow fan from the front side of the vehicle as a secondary flow, and the amount of air sucked in is large. This is because the performance of the blower can be improved for reasons such as becoming.

  (2) In the vehicle air conditioner shown in FIG. 1, the first air conditioner 10 is arranged in the instrument panel 1, but the conditioned air is blown from the front side of the vehicle toward the front seat rather than the front seat in the passenger compartment. If possible, they may be arranged at other positions. In other words, the location of the first air conditioner 10 can be arbitrarily changed as long as the air outlet 11 of the first air conditioner 10 is positioned at least on the vehicle front side with respect to the front seat 3.

  (3) In each of the above-described embodiments, the case where the air outlet 23 is provided in the rear side surface 24d of the case 24 has been described as an example. However, the air outlet 23 is located on the vehicle rear side with respect to the cross flow fan 21, and As long as the air can be blown toward, it may be provided at another position. For example, you may provide from the back side surface 24d to the lower surface 24b.

1 is a vehicle mounting diagram of a vehicle air conditioner according to a first embodiment of the present invention. It is sectional drawing of the 2nd air conditioner 20 in FIG. It is a figure which shows the air blower characteristic curve in 1st Embodiment and a comparative example. It is a figure which shows the layout of the crossflow fan 21 and the suction inlet 22 when the air blower characteristic curve (A)-(C) in FIG. 3 is measured. It is sectional drawing of the 2nd air conditioner in 2nd Embodiment of this invention. It is a vehicle mounting figure of the conventional vehicle air conditioner.

Explanation of symbols

1 ... Instrument panel, 2 ... Ceiling, 3 ... Front seat, 4 ... Rear seat,
10 ... 1st air conditioner, 11 ... Outlet,
20 ... 2nd air conditioner, 21 ... Cross flow fan, 21a ... Rotating shaft,
22 ... Suction port, 23 ... Outlet, 24 ... Case, 25 ... Stabilizer,
31 ... Peltier element, 32a ... lower passage, 32b ... upper passage.

Claims (5)

A first air conditioner (10) that performs air conditioning of at least a front seat side region in a vehicle interior by blowing air-conditioned air from the front side of the vehicle toward the front seat;
A second air conditioner (20) installed on the ceiling of the vehicle and performing air conditioning of the rear seat side area of the vehicle interior;
The second air conditioner accommodates the cross flow fan (21) whose horizontal axis is the rotation axis (21a), the cross flow fan, and has an air inlet (22) and an air outlet (23). A case (24) provided, and the cross-flow fan sucks the conditioned air blown from the first air conditioner into the case from the suction port and blows it out of the case from the blowout port. In the vehicle air conditioner
The suction port is located at least directly below the cross flow fan on the lower surface (24b) of the case so that conditioned air is sucked into the cross flow fan from below.
The vehicle air conditioner is characterized in that the air outlet is located in a portion of the case on the rear side of the vehicle with respect to the cross flow fan. A vehicle air conditioner (20) disposed on a ceiling of a vehicle,
A case (24) in which a cross flow fan (21) having a horizontal axis as a rotation axis (21a) and the cross flow fan is accommodated and provided with an air inlet (22) and an air outlet (23) And
By discharging the conditioned air from the front side of the vehicle toward the front seat, the conditioned air blown from the front seat air conditioner (10) that performs air conditioning of at least the front seat side region in the vehicle interior is caused by the cross flow fan. In the vehicle air conditioner for air conditioning the rear seat side region of the vehicle interior by sucking into the case from the suction port and blowing out of the case from the blowout port,
The suction port is located at least directly below the cross flow fan on the lower surface (24b) of the case so that conditioned air is sucked into the cross flow fan from below.
The vehicle air conditioner is characterized in that the air outlet is located in a portion of the case on the rear side of the vehicle with respect to the cross flow fan. The suction port (22) has an end (22a) on the vehicle rear side located on the vehicle rear side with respect to the rotation shaft (21a) of the cross flow fan (21). Item 3. The vehicle air conditioner according to Item 1 or 2. The said suction inlet (22) has the edge part (22b) of the vehicle front side located in the side surface (24c) of the vehicle front side of the said case (24), The Claim 1 thru | or 3 characterized by the above-mentioned. The vehicle air conditioner as described in any one. A Peltier element (31) disposed on the downstream side of the air flow of the cross flow fan (24) in the case (24);
A first passage (32a) provided inside the case on the downstream side of the air flow of the Peltier element, for guiding the air cooled by the Peltier element to the outlet (23);
A second passage (32b) provided inside the case on the downstream side of the air flow of the Peltier element and for guiding the air that has absorbed the exhaust heat of the Peltier element to the outside of the passenger compartment. Item 5. The vehicle air conditioner according to any one of Items 1 to 4.

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