JP2007106228A - Air conditioning unit for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning unit for a vehicle capable of avoiding increase of ventilating resistance and reducing noises of ducts even when it is constituted to have the ducts in accordance with arrangement of an intake part and a blower to eliminate a dead space in a lower region of the intake part by arrangement of the intake part and the blower. <P>SOLUTION: A scroll case part 18A storing the blower in it is arranged on the lower side of the intake part 2. An air delivery port 7 to deliver air introduced by an inside and outside air introduction ports 4, 5 is formed on the intake case 3. An air intake port 20 to deliver air to a fan 12 is formed on a temperature controlling case 18. The air intake port 20 is set against an air suction port 12A of the fan 20. The air delivery port 7 and the air suction port 12A of the fan 12 are communicated through to each other through the ducts 8. Inside diameter dimensions of the air delivery port 7, the air suction port 12A and the ducts 8 are made roughly in the same size. Additionally, the noises are muffled by making wavelength of the noise from the one duct 8 and wavelength of the noise from the other duct 8 different from each other by changing dimensions of the ducts 8, 8 and by colliding these noises against each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a structure of a vertically integrated type fully integrated air conditioning unit that is equipped with a twin fan type blower and is disposed, for example, in the center of a vehicle.

A vehicle air conditioning unit equipped with a twin fan type blower in which two fans are connected to both sides of a motor via drive shafts is already known. In such a vehicle air conditioning unit, for example, a blower is used. In a model called a fully integrated type that is stored in the temperature control section, the intake section that stores the intake door for switching between the inside and outside air is a temperature control that stores the blower, heat exchanger, etc. It is usual to arrange | position along the axial direction of a fan with respect to a part, ie, the both sides of a vehicle width direction (for example, refer patent document 1-patent document 4).
JP-A-1-106307 Japanese Patent Laid-Open No. 3-16897 JP 2004-9754 A JP 2004-299456 A

  However, if intake portions are arranged on both sides in the vehicle width direction with respect to the blower, the vehicle lower area of the intake portion tends to be a dead space, and the area to be secured for mounting the air conditioning unit is unnecessarily enlarged. There is an inconvenience that it is impossible to meet the demand for space saving of the air conditioning unit for vehicles.

  In this respect, in order to eliminate the dead space in the lower region of the intake portion, it is conceivable to devise the positional relationship between the blower and the intake portion. On the other hand, depending on the positional relationship between the blower and the intake portion, it is necessary to take a configuration in which an opening for sending air in the intake portion and the air intake port of the blower are connected via a duct. There is a need to suppress the increase in ventilation resistance when air passes through the duct, and to suppress the generation of noise when air passes through the duct, particularly the leeward end thereof.

  Therefore, the present invention eliminates the dead space in the lower region of the intake portion by arranging the intake portion and the blower, and avoids an increase in ventilation resistance even when the duct has a configuration accompanying this, and the air is ducted. It aims at providing the air-conditioning unit for vehicles which reduced the noise generated by passing.

  A vehicle air conditioning unit according to the present invention includes a case in which an introduction port for introducing inside air or outside air is formed, and an intake door that is housed in the case and switches between inside and outside air by appropriately opening and closing the introduction port. And at least a case in which an intake section including a plurality of fans and a temperature control means arranged on an air flow path on the leeward side of the blower are accommodated in a case. In addition, the blower is disposed substantially downward in the vertical direction of the vehicle with respect to the intake portion (Claim 1). And, in the case of the intake part, one or more openings for sending the air introduced from the introduction port are formed, and each of the air intake ports of the fan is formed in the case of the temperature control unit. And forming an opening for taking in air introduced from the introduction port, the inner diameter dimension of the opening portion of the intake portion and the inner diameter dimension of the air suction port of the fan are substantially the same size, The opening part of the intake part and the air intake port of the fan are communicated with each other via a duct having an inner diameter dimension substantially the same as the inner diameter dimension of the opening part of the intake part and the air suction port of the fan. ). The temperature adjusting means is, for example, a cooling heat exchanger, a heating heat exchanger, an air mix door, or the like.

  In the vehicle air conditioning unit according to the present invention, the dimension from the opening of one of the intake portions of the duct to the air inlet of the fan is determined from the opening of the other intake portion of the duct. It is longer than the dimension up to the air intake port of the fan. Further, a silencer is connected to the one duct and the other duct. This silencer may be, for example, a resonator or the like, in which both ducts communicate with each other.

  On the other hand, in the vehicle air-conditioning unit according to the present invention, when the inside air inlet is open toward the vehicle interior side, a sound insulating plate is disposed to face the inside air inlet. ). And the said sound insulation board is integrally formed with the case of the said temperature control part (Claim 6).

  According to the present invention, since the blower is disposed in the lower area of the intake section in the vehicle vertical direction, the lower area of the intake section is effectively used, so that it does not become a dead space, and the necessary mounting space for the vehicle air conditioning unit is increased. It is relatively reduced and can meet the demand for space saving of the vehicle air conditioning unit. And even when using a twin-fan blower, it is possible to combine the intake portions into one, so in comparison with the configuration in which the two intake portions are juxtaposed in the vehicle width direction with respect to the temperature adjustment portion, from this point Can also meet the demand for space-saving vehicle air conditioning units. Moreover, since the intake door can be unified, the manufacturing cost of the vehicle air conditioning unit can be reduced by reducing the number of parts.

  In particular, according to the second aspect of the present invention, the inner diameter dimensions of the opening of the intake section, the air suction port of the fan of the blower, and the duct that connects the opening and the air suction port are substantially the same. By doing so, the flow of air is smoothed and the amount of ventilation is relatively increased. Along with this, in the range where the air sent from the opening of the intake part passes through the duct and reaches the air inlet of the fan of the blower, the ventilation resistance becomes relatively small, and the opening area of the leeward side end part of the duct is reduced. Since it becomes relatively large, the noise generated when air passes through the duct, particularly the leeward end, is also reduced.

  In particular, according to the invention described in claim 3, when the total length from the end portion of the opening portion of the intake portion to the air intake port of the fan of the blower is made different for both ducts, the air passes through one duct. Because the difference between the wavelength of the noise generated in the air and the wavelength of the noise generated when the air passes through the other duct, the noise collides with each other and cancels out. Noise generated when air passes can be reduced more effectively.

  In particular, according to the invention described in claim 4, noise generated when air passes through the duct can be more effectively reduced by connecting a silencer such as a resonator to both the ducts.

  In particular, according to the invention described in claim 5, even if abnormal noise in the intake portion is emitted toward the vehicle interior via the inside air introduction port, it is reflected to the dash panel side by the sound insulation plate, and further this sound insulation plate. Since the sound is attenuated between the sound reflected in the vehicle, it is possible to suppress an unpleasant noise from being transmitted to a person boarding the vehicle interior. By arranging a sound absorbing material on the sound insulating plate, it is possible to absorb the abnormal sound emitted from the inside air inlet.

  And according to invention of Claim 6, even if it has a structure which has a sound insulation board as shown in Claim 5, the said sound insulation board can be formed in the same process by the case of a temperature control part, die cutting, etc. Therefore, an increase in the manufacturing cost of the vehicle air conditioning unit can be suppressed.

  Embodiments of the present invention will be described below with reference to the drawings.

  The air conditioning unit 1 shown in FIGS. 1 to 4 is an example of an embodiment of the present invention, and is, for example, a vertical center-placed fully integrated type mounted on a center console portion of a vehicle. The air conditioning unit 1 is arranged closer to the vehicle compartment side than the partition plate that partitions the engine room and the vehicle interior, and basically includes an intake portion 2 and a temperature control portion 10.

  Of these, the intake portion 2 has an outside air introduction port 4 and an inside air introduction port 5 appropriately opened with respect to the intake case 3. In this embodiment, the outside air introduction port 4 is on the front side in the vehicle traveling direction. The inside air inlet 5 is opened to communicate with the vehicle interior space on the rear side in the vehicle traveling direction. An intake door 6 is accommodated in the intake case 3 at a position that is a boundary portion between the inside and outside air introduction ports 4 and 5. The intake door 6 is a known one for appropriately selecting the air introduced from the inside air introduction port 5 and the air introduced from the outside air introduction port 4, and in this embodiment, the radial direction from the rotation shaft and the rotation shaft to the intake door 6 However, the present invention is not necessarily limited thereto, and may be, for example, a rotary type.

  And the intake part 2 is provided in the side surface used as the outer side of a vehicle width direction among the side surfaces along the vehicle advancing direction of the intake case 3 via the air intake 20 and the duct 8 which opened to the temperature control case 18 mentioned later. The air outlet 7 to be connected is opened.

  The temperature control unit 10 includes a blower 11 for sending air from the intake unit 2 to the downstream side in a temperature control case 18 in which an air flow path 19 is formed, and an evaporator for cooling the air sent by the blower 11 The heat exchanger 15 for cooling, etc., the heat exchanger 16 for heating such as a heater core for reheating the air cooled by the heat exchanger 15 for cooling, and the heat exchanger 15 for cooling and the heat exchanger 16 for heating. An air mix door 17 that adjusts the ratio of the air that is disposed between them and is sent to the heating heat exchanger 16 and the air that is bypassed is accommodated so as to be disposed along the air flow path 19.

  The blower 11 includes two fans 12 and 12 arranged in parallel along the vehicle width direction, a motor 13 disposed between the fans 12 and 12, and a fan 12 extending from the motor 13 in a symmetric direction. And drive shafts 14 and 14 for transmitting rotation to 12. That is, the motor 13 used in the blower 11 is a coaxial motor. The air inlet 12 </ b> A of each fan 12, 12 is opened on the opposite side to the motor 13 so as to face an air intake port 20, which will be described later, opened in the scroll case portion 18 </ b> A of the temperature control case 18.

  The cooling heat exchanger 15 is arranged so that all the air introduced in the air flow path 19 passes therethrough. For example, a plurality of corrugated fins and tubes are alternately stacked in a core. In this embodiment, the tanks are installed so as to be in a substantially horizontal state. However, the cooling heat exchanger 15 may be substantially erected along the vehicle vertical direction. The heat exchanger 16 for heating is formed, for example, by alternately laminating a plurality of corrugated fins and tubes, and has a tank at the longitudinal end of the tube. In this embodiment, the air mix door 17 is a slide door type in which the door main body slides along the groove in the vehicle traveling direction. However, the present invention is not limited to this, and a butterfly type or flag type door main body is used. It may rotate.

  In addition, the temperature control unit 10 is provided with a hot air passage 21 in the temperature control case 18 through which air reheated by the heat exchanger 16 for heating passes as a part of the air flow path 19. A cold air passage 22 through which air bypassing the heating heat exchanger 16 passes is formed as a part of the air flow path 19.

  Then, on the downstream side of the air mix chamber 23 where the hot air passage 21 and the cold air passage 22 merge, a vent blowing opening 24, a differential blowing passage 25, and a differential blowing opening 26 provided at the tip thereof, Further, a foot blowing passage 27 and a foot blowing opening 27 provided at the tip thereof are appropriately provided in the temperature control case 18.

  Further, a vent mode switching door 30 for opening and closing the vent blowing opening 24 is provided in the vicinity of the vent blowing opening 24, and the def blowing opening 25 is blown from the proximal end side of the differential blowing passage 25. A differential mode switching door 31 for controlling the amount of air to be performed, and a foot mode switching door 32 for controlling the amount of air blown from the foot blowing opening 28 on the proximal end side of the foot blowing passage 27. Is provided. In the present embodiment, these doors 30, 31, and 32 are illustrated as butterfly types in which two door bodies extend in a substantially symmetrical direction from the side of the rotating shaft, but are not necessarily limited to this. Alternatively, a flag type or a rotary type may be used.

  By the way, as shown in FIGS. 1, 2, and 3, the temperature control unit 10 includes two scroll case units 18 </ b> A in which the blower 1 is housed, which is substantially below in the vehicle vertical direction with respect to the single intake unit 2. It is arranged at the position that becomes the area. In this case, the dimension along the vehicle width direction of the single intake portion 2 is the distance from the outer end in the vehicle width direction of one scroll case portion 18A to the outer end in the vehicle width direction of the other scroll case portion 18A. It will be almost the same. The open areas of the outside air introduction port 4 and the inside air introduction port 5 are also relatively larger than when two intake portions are arranged in parallel, and the intake door 6 is also unified.

  Further, the air intake port 20 opened in the temperature control case 18 and the air delivery port 7 opened in the intake case 3 are positioned along a substantially vertical direction in the vertical direction of the vehicle, and at least the inner diameter dimension of the air delivery port 7. Is substantially the same as the inner diameter of the air inlet 12A of the fan 12. Along with this, the duct 8 whose windward opening end is connected to the air outlet 7 and whose leeward opening end is opposed to the air inlet 12A of the fan 12 extends toward the outside of the vehicle along the vehicle width direction. After that, it bends and has a substantially U shape extending toward the temperature control unit 10 in the vehicle width direction, while its inner diameter is substantially the same as the inner diameter of the air inlet 12A of the fan 12. The inner diameter of the air inlet 20 may be substantially the same as the inner diameter of the air outlet 7 and the inner diameter of the air inlet 12A of the fan 12.

  Thus, since the scroll case part 18A which accommodated the air blower 11 of the temperature control part 10 is arrange | positioned in the downward area of the vehicle up-down direction of the intake part 2, the downward area of the intake part 2 is used effectively, and dead space Therefore, the necessary mounting space of the vehicle air conditioning unit 1 is reduced as compared with the case where the intake portion is offset along the vehicle width direction with respect to the temperature control portion. It can meet the demand for space saving of mounting volume. Further, the air flow from the air outlet 7 to the air inlet 12A of the fan 12 through the duct 8 becomes smooth and the ventilation resistance is reduced, so that the amount of ventilation sent from the intake portion 2 to the temperature adjustment portion 10 is relatively low. Increase. Furthermore, since the opening area of the leeward side end of the duct 8 is relatively large, noise generated when air passes through the duct 8, particularly the leeward side end, is reduced.

  Here, one duct 8 (right side as viewed from the front in the vehicle width direction of FIG. 2 in this embodiment) and the other duct 8 (left side as viewed from the front in the vehicle width direction of FIG. 2 in this embodiment) The other duct 8 is longer in the dimension from the air outlet 7 to the air inlet 12A of the fan 12. The dimensional difference between the one duct 8 and the other duct 8 is, for example, that the wavelength of noise generated at the leeward end portion of one duct 8 and the wavelength of noise generated at the leeward end of the other duct 8 are in a half band. It is set to deviate. However, one duct 8 may be longer than the other duct 8 as long as the above conditions are satisfied.

  As a result, the noise generated at the leeward side end portion of one duct 8 and the noise generated at the leeward end of the other duct 8 cancel each other out, so that the noise generated when air passes through the duct 8 is further reduced. It can be effectively reduced.

  Further, as shown in FIGS. 1 and 3, a sound insulating plate 33 is installed at a portion facing the inside air introduction port 5 of the temperature control case 18. The sound insulating plate 33 extends along the inside air introduction port 5 while being spaced apart from the inside air introduction port 5 and is curved toward the inside air introduction port 5, and the plate body 34 and the temperature control case 18. And a column portion 35 connecting the two. A sound absorbing material may be disposed on the side surface of the inside air inlet of the plate body 34 of the sound insulating plate 33.

  Even if abnormal noise in the intake portion 2 is emitted from the inside air introduction port 5 toward the vehicle interior side, it is reflected by the sound insulation plate 33 (not shown) that separates the vehicle interior from the vehicle exterior, and further this sound insulation plate 33. Since the sound is attenuated between the sound reflected in the vehicle, it is possible to suppress an unpleasant noise from being transmitted to a person boarding the vehicle interior. In addition, when a sound absorbing material is arranged on the plate body 34 of the sound insulating plate 33, the noise generated from the inside air inlet 5 is absorbed, so that the noise can be reduced more effectively.

  5 and 6 show a modified example of the invention of the vehicle air conditioning unit 1. Hereinafter, the vehicle air conditioning unit 1 will be described with reference to FIGS. 5 and 6. However, the same components as those of the previous embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the vehicle air conditioning unit 1, a silencer 36 is connected to the ducts 8 and 8. The silencer 36 is called, for example, a resonator, and basically includes a cylindrical body 37 branched from the middle of the duct 8. In this embodiment, the silencer 36 is configured such that one end of the cylindrical body 37 is connected to one duct 8 and the other end of the cylindrical body 37 is connected to the other duct 8. 8 is configured to communicate with each other via a cylindrical body 37 of the silencer 36. By using such a silencer 36, noise generated when air passes through the duct 8 can be more effectively reduced.

FIG. 1 is a front view showing the air conditioning unit of the present invention as seen from the vehicle width direction. FIG. 2 is a front view showing a state in which the above air conditioning unit is viewed from the front side in the vehicle traveling direction. FIG. 3 is a cross-sectional view taken along line II of the air conditioning unit shown in FIG. 4 is a cross-sectional view of the air conditioning unit shown in FIG. 3 taken along the line II-II. FIG. 5 is a front view showing a modified example in which a resonator is attached to the above air conditioning unit. FIG. 6 is a side view of the air conditioning unit in a state where the resonator shown in FIG. 5 is attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle air-conditioning unit 2 Intake part 3 Intake case (case)
4 Outside air inlet 5 Inside air inlet 6 Intake door 7 Air outlet (opening)
8 Duct 10 Temperature Control Unit 11 Blower 12 Fan 12A Air Suction Port 15 Heat Exchanger for Cooling (Temperature Control Means)
16 Heat exchanger for heating (temperature control means)
17 Air mix door 18 Temperature control case (case)
18A Scroll case (case)
19 Air flow path 20 Air intake (opening)
33 Sound insulation plate 36 Silencer

Claims (6)

An intake part provided with at least an intake door for switching between inside and outside air, which is housed in the case and appropriately opens and closes the introduction port, and a case in which an introduction port for introducing inside air or outside air is formed;
A blower comprising a plurality of fans arranged side by side in the vehicle width direction, and a temperature control unit that houses at least a temperature control unit disposed on the air flow path on the leeward side with respect to the blower,
An air conditioning unit for a vehicle, wherein the blower is disposed on a substantially lower side in a vehicle vertical direction with respect to the intake portion. One or more openings for sending air introduced from the introduction port are formed in the case of the intake unit, and the case of the temperature control unit is opposed to each of the air intake ports of the fan. And forming an opening for taking in air introduced from the inlet,
The inner diameter dimension of the opening of the intake section and the inner diameter dimension of the air intake port of the fan are substantially the same size, and the opening portion of the intake section and the air suction port of the fan are connected to the opening section of the intake section and the fan. The vehicle air conditioning unit according to claim 1, wherein the air conditioning unit is in communication with each other through a duct having an inner diameter dimension substantially the same as an inner diameter dimension of the air suction port. The dimension from the opening of the intake part of one of the ducts to the air inlet of the fan is larger than the dimension from the opening of the other intake part of the duct to the air inlet of the fan. The vehicle air conditioning unit according to claim 2, wherein the vehicle air conditioning unit is long. The vehicle air conditioning unit according to claim 3, wherein a silencer is connected to the one duct and the other duct. 5. The sound insulation board is arranged so as to face the inside air introduction port when the inside air introduction port opens toward the vehicle interior side. Vehicle air conditioning unit. The vehicle air conditioning unit according to claim 5, wherein the sound insulating plate is integrally formed with a case of the temperature control unit.

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