Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating devices

Definitions

• This disclosure relates to an air conditioning system installed in a vehicle.
• air conditioners are known that are attached to a partition (i.e., a firewall) that separates the engine room or motor room of a vehicle from the passenger compartment, and that are provided across the engine room or motor room and the passenger compartment.
• a partition i.e., a firewall
• an inside/outside air intake case that draws in air inside and outside the vehicle cabin is disposed in an area on the engine compartment side of the partition, and an air conditioning case equipped with a blower is disposed in an area on the interior side of the partition.
• the air conditioning device is fixed by a fixing member via a seal packing to the area around an opening hole formed in the partition.
• the air conditioner described in Patent Document 1 is configured such that the passage downstream of the fan of the blower extends in only one direction, radially outward from the axis of rotation of the fan.
• this air conditioner has a problem in that the balance of wind pressure acting on the inner wall surrounding the radial outside of the fan becomes unbalanced, causing increased vibration.
• the seal packing installed between the air conditioner and the partition wall deteriorates due to vibration.
• the vibration of the air conditioner is transmitted directly to the partition wall, causing abnormal noise and the like.
• the purpose of this disclosure is to provide an air conditioner that can suppress vibrations.
• an air conditioning device provided in a partition wall separating an engine room or a motor room of a vehicle from a passenger compartment, an inside/outside air intake case provided on the engine room or motor room side of an opening formed in the partition wall; an air conditioning case provided on a vehicle interior side relative to an opening formed in the partition wall; a blower having a fan that rotates about a predetermined axis and is provided in the air conditioning case such that an air intake port of the fan faces the opening hole; a partition wall that divides a space radially outward from an axis of the fan into a plurality of regions in a rotation direction of the fan in the air conditioning case;
• the air conditioning case is partitioned by an inner wall radially outward from the axis of the fan, an inner wall on the partition wall side, and a partition wall, and includes a plurality of outer passages formed radially outward from the axis of the fan.
• the wind blown out from the fan flows through an outer passage formed around the entire circumference radially outward from the axis of the fan. Therefore, the wind pressure acting on each part of the inner wall forming the outer passage is balanced, so vibrations can be suppressed.
• the air conditioner of another aspect of the present disclosure can reduce the wind pressure acting on each part of the inner wall forming the outer passage compared to that of Patent Document 1, and can suppress vibrations.
• a seal packing is provided between the air conditioner case and the partition wall, deterioration of the seal packing due to vibrations can be suppressed.
• the air conditioner case and the partition wall are fixed with screws or the like, the generation of abnormal noise due to vibrations of the partition wall can be suppressed.
• an air conditioner 1 according to this embodiment is attached to a partition wall 4 (i.e., a firewall) that separates an engine room or motor room 2 from a passenger compartment 3 of a vehicle, and is provided so as to straddle the engine room or motor room 2 and the passenger compartment 3.
• a partition wall 4 i.e., a firewall
• the coordinates shown in each drawing indicate the front-to-rear direction of the vehicle when the air conditioning device 1 is installed in the vehicle with "front” and “rear”, the top-to-bottom direction of the vehicle with “up” and “down”, and the left-to-right direction in the vehicle width direction with “left” and "right”.
• the air conditioning case 20 is provided in the area on the passenger compartment 3 side of the opening 5 formed in the partition 4. More specifically, the air conditioning case 20 is provided inside the instrument panel (not shown) in the area on the passenger compartment 3 side.
• the inside/outside air intake case 10 is provided in the area on the engine room or motor room 2 side, making it possible to reduce the size of the air conditioning case 20 provided in the area on the passenger compartment 3 side. This makes it possible to reduce the space in the instrument panel where the air conditioning case 20 is located, thereby ensuring a larger living space in the passenger compartment 3.
• the air conditioning case 20 is fixed to the partition wall 4.
• a seal packing 6 is provided between the air conditioning case 20 and the partition wall 4.
• the seal packing 6 prevents air leakage from within the air conditioning case 20 and can suppress the transmission of vibration between the air conditioning case 20 and the partition wall 4.
• the seal packing 6 may be omitted and the air conditioning case 20 and the partition wall 4 may be directly fixed with screws (not shown) or the like.
• the seal packing 6 may be interposed between the air conditioning case 20 and the partition wall 4 and fixed with screws or the like.
• the radial direction of an imaginary circle perpendicular to the axis CL of rotation of the fan 31 and centered on the axis CL is referred to as the "radial direction with respect to the axis CL of the fan 31.” Additionally, the direction moving away from the axis CL in the radial direction with respect to the axis CL of the fan 31 is referred to as the "radial outward direction with respect to the axis CL of the fan 31.”
• the multiple outer passages 50 include a first outer passage 51 and a second outer passage 52.
• the first outer passage 51 and the second outer passage 52 are formed symmetrically with respect to the axis CL of the fan 31.
• the first outer passage 51 is formed on the upper side of the vehicle with respect to the axis CL of the fan 31
• the second outer passage 52 is formed on the lower side of the vehicle with respect to the axis CL of the fan 31.
• the flow area of the first outer passage 51 and the second outer passage 52 is preferably approximately the same.
• the flow area of the first outer passage 51 and the second outer passage 52 is preferably approximately the same. In this disclosure, approximately the same includes an error of about 10 to 20% in addition to being completely the same.
• a downstream passage 60 is formed inside the air conditioning case 20, on the opposite side of the partition wall 4 from the fan 31.
• the boundary between the outer passage 50 and the downstream passage 60 is shown by a dashed line B for the sake of explanation, but in reality, the outer passage 50 and the downstream passage 60 are a continuous space. Therefore, the first outer passage 51, the second outer passage 52, and the downstream passage 60 are connected to each other.
• the air conditioner 1 of the first embodiment is configured such that an inside/outside air intake case 10 is provided on the engine room or motor room 2 side of an opening hole 5 in a bulkhead 4 of a vehicle, and an air conditioning case 20 is provided on the passenger compartment 3 side.
• an air conditioning case 20 is provided on the passenger compartment 3 side.
• a plurality of outer passages 50 are formed in an area radially outward from an axis CL of a fan 31.
• the plurality of outer passages 50 are partitioned by an inner wall 22 of the air conditioning case 20 radially outward from the axis CL of the fan 31, an inner wall 23 on the bulkhead 4 side, and a partition wall 40.
• the air conditioner 1 of the fourth embodiment includes a filter 70, a cooling device 80, an air mix door 90, and a heating device 100 in the downstream passage 60, in this order from the upstream side.
• FIG. 6 shows a state in which the two air mix doors 90 open the first bypass passage 61 and the second bypass passage 62 and close the heating device 100.
• the wind flowing through the downstream passage 60 bypasses the heating device 100 and flows through the first bypass passage 61 and the second bypass passage 62.
• the first air mix door 91 can be moved upward from the state shown in FIG. 6, and the second air mix door 92 can be moved downward from the state shown in FIG. 6.
• the first bypass passage 61 is blocked and the heating device 100 is opened.
• the second air mix door 92 moves downward from the state shown in FIG. 6, the second bypass passage 62 is blocked and the heating device 100 is opened. In this case, the wind flowing through the downstream passage 60 flows through the heating device 100 without flowing through the first bypass passage 61 and the second bypass passage 62.
• the opening degree of the first air mix door 91 and the second air mix door 92 By adjusting the opening degree of the first air mix door 91 and the second air mix door 92, the amount of air flowing through the first bypass passage 61, the amount of air flowing through the second bypass passage 62, and the amount of air passing through the heating device 100 can each be adjusted.
• the first air mix door 91 and the second air mix door 92 are driven and controlled by the air conditioning control device 7 (hereinafter referred to as "air conditioning ECU 7").
• ECU is an abbreviation for Electronic Control Unit.
• the air conditioning ECU 7 is composed of a microcomputer including a processor that performs control processing and arithmetic processing, a storage unit such as ROM and RAM that stores programs and data, etc., and its peripheral circuits.
• the storage unit i.e., memory
• the processor performs various control processing and arithmetic processing based on the programs stored in the storage unit.
• the air conditioning ECU 7 drives the first air mix door 91 and the second air mix door 92 as shown in FIG. 6 to fully open the first bypass passage 61 and the second bypass passage 62, shielding the heating equipment 100.
• the wind that bypasses the heating equipment 100 flows through the first bypass passage 61 and the second bypass passage 62. Therefore, it is possible to balance the wind pressure acting on the inner wall forming the first bypass passage 61 in the air conditioning case 20 with the wind pressure acting on the inner wall forming the second bypass passage 62, and vibration of the air conditioner 1 can be suppressed. Therefore, in the fourth embodiment, symmetrical upper and lower blowing is achieved at maximum cooling, when the air volume is the largest and the vibration is greatest.
• a difference may occur between the opening of the first bypass passage 61 and the opening of the second bypass passage 62, resulting in a difference in the amount of air blown up and down from the blower 30.
• a cool head and warm feet is required, so it is conceivable to reduce the opening of the second bypass passage 62 with the second air mix door 92 and increase the opening of the first bypass passage 61 with the first air mix door 91.
• the impact of the vibration of the blower 30 is smaller than at maximum cooling.
• the fourth embodiment is configured to maximize the vibration suppression effect at maximum cooling, when the impact of the vibration of the blower 30 is greatest.
• a plurality of bypass passages 61, 62 are formed in symmetrical positions with respect to the heating device 100 in the air conditioner case 20.
• the air conditioner ECU 7 fully opens the plurality of bypass passages 61, 62 during maximum cooling, and drives and controls the air mix door 90 to shield the heating device 100. According to this, during maximum cooling when the amount of air blown by the blower 30 is maximum, the air conditioning ECU 7 fully opens the multiple bypass passages 61, 62 using the air mix door 90 to shield the heating device 100. Therefore, it is possible to balance the wind pressure acting on the inner walls that form the multiple bypass passages 61, 62, and it is possible to suppress vibration of the air conditioning device 1.
• first outer passage 51 and the second outer passage 52 are disposed symmetrically in the vertical direction of the vehicle with respect to the axis CL of the fan 31.
• this is not limiting.
• the first outer passage 51 and the second outer passage 52 may be disposed symmetrically in the left-right direction in the vehicle width direction, or may be disposed symmetrically in an oblique direction.
• the air conditioner 1 is described as having one to three outer passages 50, but this is not limiting, and for example, the air conditioner 1 may have four or more outer passages 50.
• the first bypass passage 61 and the second bypass passage 62 are arranged symmetrically in the vertical direction of the vehicle with the heating device 100 in between, but this is not limited to the above.
• the first bypass passage 61 and the second bypass passage 62 may be arranged symmetrically in the left and right direction of the vehicle width with the heating device 100 in between, or may be arranged symmetrically in the diagonal direction.
• the air conditioner according to a first aspect wherein the outer passages are formed at positions symmetrical with respect to an axis of the fan.
• the plurality of outer passages include a first outer passage (51) and a second outer passage (52);
• the air conditioner according to the first or second aspect wherein the first outer passage and the second outer passage are formed at positions symmetrical with respect to an axis of the fan.
• the air conditioning device according to any one of the first to third aspects, further comprising a downstream passage (60) formed in the air conditioning case on the opposite side of the partition wall to the fan and communicating with a plurality of the outer passages.
• An air conditioning device provided in a partition wall (4) separating an engine room or motor room (2) from a passenger compartment (3) of a vehicle, an inside/outside air intake case (10) provided on the engine room or motor room side of the opening hole (5) formed in the partition wall; an air conditioning case (20) provided on the vehicle interior side relative to the opening formed in the partition; a blower (30) having a fan (31) rotating about a predetermined axis (CL) and installed in the air conditioning case such that an air intake port (33) of the fan faces the opening hole; an outer passage (50) defined by an inner wall (22) on the radially outer side of the axis of the fan and an inner wall (23) on the partition side of the air conditioning case, the outer passage (50) being formed on the entire circumference on the radially outer side of the axis of the fan; the downstream passage (60) being formed in the air conditioning case on the opposite side of the partition wall with respect to the fan and communicating with the outer passage.
• a heating device (100) disposed downstream of the cooling device and configured to heat air flowing through the downstream passage;
• a plurality of bypass passages (61, 62) formed in the air conditioning case between an inner wall of the downstream passage and the heating device, the plurality of bypass passages being formed at positions symmetrical with respect to the heating device;
• an air mix door (90) for opening and closing the heating device and the plurality of bypass passages;

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• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Air-Conditioning For Vehicles (AREA)

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Citations (3)

• 2025
  • 2025-01-06 WO PCT/JP2025/000045 patent/WO2025154560A1/ja active Pending
  • 2025-01-06 JP JP2025570977A patent/JPWO2025154560A1/ja active Pending

Patent Citations (3)

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