JP6882622B2 - Vehicle air conditioner - Google Patents

Description

The present invention relates to a vehicle air conditioner mounted on a vehicle, and more particularly to a vehicle air conditioner having an aspirator for guiding air in the vehicle interior to a temperature sensor installation portion for detecting the vehicle interior temperature.

Conventionally, a vehicle air conditioner mounted on a vehicle is provided with a temperature sensor that detects the temperature inside the vehicle interior, and an aspirator for guiding the air inside the vehicle interior is provided at a location where the temperature sensor is installed. This aspirator is installed on the side wall along the width direction of the case body, and has a nozzle that sucks the air inside the vehicle as secondary air to the installation site of the temperature sensor, and an air flow path that surrounds the outer circumference of the nozzle. It is composed of a main body to be formed and a primary air introduction portion that takes a part of the air flowing through the inside of the air conditioning case as primary air into the inside of the main body.

Then, by introducing a part of the air flowing in the case body of the vehicle air conditioner into the primary air introduction part of the aspirator, the air in the vehicle interior is used as the secondary air through the nozzle by the Venturi effect to the installation site of the temperature sensor. The air temperature inside the vehicle is detected by suction.

Japanese Unexamined Patent Publication No. 2014-141185

In recent years, in vehicle air conditioners as described above, the ventilation resistance has been reduced for the purpose of further increasing the amount of air blown into the vehicle interior, and the inside of the case body has been reduced along with the reduction of the ventilation resistance. There is a problem that the pressure drops and the air in the vehicle interior cannot be sucked at a sufficient flow rate by the aspirator.

The present invention has been made in consideration of the above problems, and provides an air conditioner for a vehicle capable of sufficiently blowing air to a temperature sensor installation portion while increasing the amount of air blown into the vehicle interior. The purpose.

In order to achieve the above object, the present invention presents an air-conditioning case having a flow path and an air outlet through which air flows, and an ejector provided in the air-conditioning case that takes in air from the vehicle interior and supplies it to a temperature sensor installation unit. In the vehicle air conditioner with
The aspirator is provided with an air introduction section into which air flowing through the flow path is introduced, and the air introduction section is provided so as to extend along the flow path inside the air conditioning case, and the flow direction of the flow path in the air conditioning case. It is placed in the center of the width direction, which is almost orthogonal to
The air outlet has a first air outlet that blows air to the vicinity of the occupant's face in the passenger compartment and a second air outlet that blows air to the vicinity of the occupant's feet, and the second air outlet opens to the wall of the air conditioning case. It is characterized by having first and second openings divided into two in the width direction by an air introduction portion.

According to the present invention, the air-conditioning case constituting the vehicle air-conditioning device is provided with an aspirator that takes in the air in the vehicle interior and supplies it to the temperature sensor installation portion. It has an air-introducing part that extends along the waterway and introduces air flowing through the flow path. Further, the air introduction portion is provided so as to extend along the flow path inside the air conditioning case, and is arranged in the center of the air conditioning case in the width direction substantially orthogonal to the flow direction of the flow path, so that the air outlet is provided. It has a first air outlet that blows air to the vicinity of the occupant's face in the passenger compartment and a second air outlet that blows air to the vicinity of the occupant's feet. It has first and second openings that are divided into two in the width direction.

Therefore, the air flowing through the flow path of the air conditioning case can be reliably guided to the ejector through the air introduction portion. For example, when the ventilation resistance in the air conditioning case is reduced and the amount of air blown from the air outlet is increased. However, the air can be taken into the aspirator at a desired flow rate and circulated, and the temperature inside the vehicle can be detected by blowing the air inside the vehicle at a sufficient flow rate to the temperature sensor installation portion.

Further, the inlet of the air introduction portion may be arranged so as to be on the upstream side of the air outlet.

Furthermore, it is preferable that the air introduction portion is configured separately from the air conditioning case, and is sandwiched and held between one air conditioning case and the other air conditioning case that can be divided in the width direction.

According to the present invention, the following effects can be obtained.

That is, the air-conditioning case constituting the vehicle air-conditioning device is provided with an aspirator that takes in the air in the vehicle interior and supplies it to the temperature sensor installation portion, and this aspirator extends along the flow path inside the air-conditioning case. By providing an air introduction section into which the air flowing through the flow path is introduced, the air flowing through the flow path of the air conditioning case can be reliably guided to the aspirator through the air introduction section. Therefore, for example, the ventilation resistance in the air conditioning case. Even if the amount of air blown from the air outlet is increased, the air can be taken into the aspirator at the desired flow rate, and the air inside the vehicle can be brought into the temperature sensor installation part at a sufficient flow rate. It becomes possible to blow air.

It is a partially omitted front view of the vehicle air conditioner which concerns on embodiment of this invention. It is sectional drawing of the air-conditioning apparatus for vehicles shown in FIG. FIG. 5 is an enlarged cross-sectional view of an ejector in the vehicle air conditioner of FIG. FIG. 4A is a cross-sectional view taken along the line IVA-IVA of FIG. 1, and FIG. 4B is a cross-sectional view taken along the line IVB-IVB of FIG.

A preferred embodiment of the vehicle air conditioner according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a vehicle air conditioner according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the vehicle air conditioner 10 includes an air conditioner case 14 that constitutes each air passage (flow path) 12 and a blower 16 that is arranged inside the air conditioner case 14. , The evaporator 18 for cooling the air, the heater core 20 for heating the air, the damper mechanism 22 for switching the flow of the air flowing in each of the passages 12, and the air conditioning case 14 provided for sucking the air in the vehicle interior. Includes an aspirator 24 for An inside / outside air switching unit (not shown) for taking in outside air / inside air is connected to the side portion of the air conditioning case 14.

The air conditioning case 14 is composed of, for example, first and second divided cases 26 and 28 having a substantially symmetrical shape, and the first and second divided cases 26 and 28 are divided in the width direction of the vehicle (arrows A1 and A2 directions). It is provided as possible. Above the air conditioning case 14, a vent blower port (blower port) 30 that blows air near the occupant's face and a defroster blower port (blower port) 32 that blows air near the front window of the vehicle are opened adjacent to each other. The defroster air outlet 32 is arranged on the front side of the vehicle (in the direction of arrow B1 in FIG. 2), and the vent air outlet 30 is arranged on the rear side of the vehicle (in the direction of arrow B2 in FIG. 2).

Further, a heat blower port (blower port) 34 for blowing air to the vicinity of the feet of the occupants in the vehicle interior is opened on the wall portion on the rear side of the vehicle (direction of arrow B2) in the air conditioning case 14, and the heat blower port 34 is, for example, The first opening 36, which is provided near the center of the air conditioning case 14 in the height direction and is formed on the side of the first division case 26 (direction of arrow A1) and the side of the second division case 28, as shown in FIG. It consists of a pair of openings divided into a second opening 38 formed in the direction of arrow A2.

Further, a mounting hole 40 for mounting the aspirator 24 is formed on the wall portion of the air conditioning case 14 on the rear side of the vehicle at a position above the heat air outlet 34.

The mounting hole 40 has a circular cross section, penetrates in the height direction so as to communicate the inside and the outside of the air conditioning case 14, and is formed so as to straddle the first divided case 26 and the second divided case 28. To. That is, as shown in FIG. 4A, the mounting holes 40 are formed so as to have a semicircular cross section with respect to the first and second divided cases 26 and 28, respectively.

On the other hand, as shown in FIG. 2, the blower 16 is housed inside the air conditioner case 14 at a position on the front side of the vehicle (direction of arrow B1) when the vehicle air conditioner 10 is mounted on the vehicle. The evaporator 18 is housed below the 16 and the heater core 20 is housed at a position on the rear side of the vehicle (in the direction of arrow B2) with respect to the evaporator 18.

The blower 16 is, for example, a centrifugal fan having a rotary fan 42 having a plurality of fins and a drive motor 44 for rotationally driving the rotary fan 42, and the axes of the rotary fan 42 and the drive motor 44 are air-conditioned. The case 14 is arranged substantially horizontally so as to extend in the width direction of the vehicle (in the directions of arrows A1 and A2 in FIG. 1).

Then, the drive motor 44 is rotationally driven based on a control signal from a controller (not shown), so that the rotary fan 42 rotates and the air taken in from the inside / outside air switching unit (not shown) is introduced into the air conditioning case 14 side. It is sent to the passage 12.

The evaporator 18 is provided, for example, below the blower 16 in the air conditioning case 14, and the refrigerant is circulated through a plurality of tubes (not shown). When the air passes through the evaporator 18, heat exchange with the refrigerant is performed, and the cooled air is released. It is supplied to the downstream side of the evaporator 18.

The heater core 20 is provided, for example, in the air conditioning case 14 on the downstream side of the evaporator 18 on the rear side of the vehicle (direction of arrow B2), and hot water is circulated through a plurality of tubes (not shown). The heat is exchanged with the heater core 20, and the heated air is supplied to the downstream side of the heater core 20.

The damper mechanism 22 is, for example, a first air mix damper 46 rotatably provided between the evaporator 18 and the heater core 20, and a first air mix damper 46 rotatably provided on the upper portion of the heater core 20 on the downstream side of the evaporator 18. 2 It has an air mix damper 48, a first switching damper 50 for switching the air blowing state of the vent air vent 30 and the defroster air port 32, and a second switching damper 52 for adjusting the air blowing state to the heat air vent 34.

The first and second air mix dampers 46 and 48 are, for example, of a butterfly type having a rotating shaft in the center, and both ends of the rotating shaft are pivotally supported by the side walls of the first and second divided cases 26 and 28. By doing so, each is rotatably supported.

In the first switching damper 50, a rotating shaft is pivotally supported between the vent air outlet 30 and the defroster air port 32, and the door portion rotates about a predetermined angle around the rotating shaft under the driving action of an actuator (not shown). Then, either the vent air outlet 30 or the defroster air outlet 32 is selectively opened / closed.

In the second switching damper 52, a rotation shaft is pivotally supported above the heat blower port 34, and the door portion opens and closes under the rotational action of the rotation shaft to switch the communication state of the heat blower port 34.

Further, as shown in FIG. 1, the second switching damper 52 extends along the width direction (arrows A1 and A2 directions) of the air conditioning case 14, and its door portion is the first opening 36 of the heat air outlet 34. The first and second split doors 54 and 56 have a first split door 54 that closes the second split door 54 and a second split door 56 that closes the second opening 38 of the heat air outlet 34, and the first and second split doors 54 and 56 are second switching dampers. The 52 is formed so as to be separated from each other by a predetermined distance from the center in the width direction. The first and second split doors 54 and 56 are formed in a rectangular cross section corresponding to the first and second openings 36 and 38 of the heat air outlet 34.

As shown in FIGS. 1 to 3, the aspirator 24 is provided, for example, in the center of the air conditioning case 14 in the width direction, and is sandwiched between the end of the first divided case 26 and the end of the second divided case 28. The body 58 is provided outside the air conditioning case 14, including a body 58 and an air introduction pipe (air introduction section) 60 connected to the body 58 to guide air in the air conditioning case 14. The air introduction pipe 60 is provided so as to be inside the air conditioning case 14.

The body 58 is provided in, for example, a main body 62 having a substantially arcuate cross section and a hollow shape, an introduction 64 connected to the main body 62 to introduce air (inside air) in the vehicle interior, and the main body 62. On the other hand, it includes a lead-out unit 66 which is connected to the side opposite to the introduction unit 64 and from which air taken into the main body 62 is derived.

At one end of the main body 62, a connecting portion 68 having an opening in a circular cross section and into which an air introduction pipe 60 is inserted and connected is formed, and the outer peripheral surface of the connecting portion 68 extends in the opening direction. A pair of engaging claws 70 are formed, and an annular sealing member 72 is provided so as to cover the outer peripheral side of the connecting portion 68. Then, the main body 62 is fixed in a state where the connecting portion 68 is inserted into the mounting hole 40 of the air conditioning case 14, and the seal member 72 is sandwiched between the main body 62 and the mounting hole 40.

The introduction portion 64 is, for example, joined between one end and the other end of the body 58, one end of which protrudes from the main body 62 by a predetermined length, and the other end extends to the inside of the main body 62. It is formed so as to extend in a straight line, and its inner peripheral diameter is gradually reduced from one end side to the other end side (arrow A2 direction).

On the other hand, the outer peripheral surface of the introduction portion 64 extends to the inside of the body 58 and is formed to have a predetermined length toward the other end portion side, and gradually extends from the middle along the longitudinal direction toward the other end portion side. It is formed in a tapered shape with a reduced outer peripheral diameter.

Then, for example, a pipe 76 connecting the temperature sensor S (see FIG. 1) installed in the vehicle interior is connected to one end of the introduction unit 64. As shown in FIG. 1, the temperature sensor S is housed in, for example, a storage member (temperature sensor installation unit) 78 mounted on an instrument panel provided in front of the vehicle interior, and the storage member 78 and the aspirator. 24 is connected and communicated with the pipe 76 through the pipe 76.

The lead-out portion 66 is joined to the other end of the main body portion 62, and is formed in a cylindrical taper shape in which the diameter of the main body portion 62 side is reduced and the diameter is gradually increased in the direction away from the main body portion 62 (arrow A2 direction). The inside thereof communicates with the introduction portion 64 and the air introduction pipe 60 through the main body portion 62. Further, as shown in FIG. 3, the lead-out portion 66 is provided so as to be coaxial with the introduction portion 64, and one end portion thereof is provided so as to face the other end portion of the introduction portion 64.

The air introduction pipe 60 is formed, for example, in a tubular shape, and is formed in a predetermined length and in a straight line along the longitudinal direction. One end of the air introduction pipe 60 is formed in a circular cross section and is inserted into one end of the opened connection portion 68, and the engaging claw 70 of the connection portion 68 inserted inside the air introduction pipe 60. Are integrally connected by being engaged with the pair of engaging holes 80 formed on the outer peripheral surface. The other end side of the air introduction pipe 60 is formed to have a rectangular cross section and is open.

Further, on the outside of the air introduction pipe 60, a support portion 82 is formed in the vicinity of substantially the center along the longitudinal direction thereof, and the support portion 82 protrudes from the wall portion of the air introduction pipe 60 by a predetermined distance. It has a pair of pins 84a and 84b substantially parallel to the pin 84a and 84b. Then, when the aspirator 24 is attached to the air conditioning case 14, one pin 84a is inserted into the first hole 86 formed at the end of the first split case 26, and the other is inserted, as shown in FIG. 4B. Pin 84b is fixed by being inserted into the second hole 88 formed at the end of the second split case 28, and on the rear side of the vehicle (in the direction of arrow B2 in FIG. 2) in the air conditioning case 14. It is arranged so as to face the wall portion and straddle the first divided case 26 and the second divided case 28 (see FIGS. 1 and 2).

The vehicle air conditioner 10 according to the embodiment of the present invention is basically configured as described above, and the case where the aspirator 24 is assembled to the air conditioner case 14 will be described next.

First, the first divided case 26 and the second divided case 28 constituting the air conditioning case 14 are divided in the width direction (arrows A1 and A2 directions), and for example, with respect to the mounting hole 40 of the first divided case 26. The connecting portion 68 of the aspirator 24 is inserted, and one pin 84a of the support portion 82 is inserted into the first hole portion 86. As a result, the aspirator 24 is supported at two points with respect to the first divided case 26 via the connecting portion 68 and the support portion 82, the body 58 is outside the first divided case 26, and the air introduction pipe 60 is the first divided case 26. It is in a temporarily assembled state arranged so as to be inside the split case 26.

Next, the end of the second division case 28 is brought closer to the open end of the first division case 26 in the width direction, and the connection portion 68 of the ejector 24 is inserted into the mounting hole 40. While inserting the other pin 84b of the support portion 82 into the second hole portion 88 of the second division case 28, the end portion of the first division case 26 and the end portion of the second division case 28 are contacted. Touch and connect to each other.

As a result, the connecting portion 68 of the body 58 of the aspirator 24 is sandwiched between the first split case 26 and the second split case 28 via the mounting hole 40, and the pins 84a and 84b of the support portion 82 are inserted. It is fixed in a state of being inserted into the first and second divided cases 26 and 28, respectively, and is arranged at the center in the width direction so as to straddle the first divided case 26 and the second divided case 28, respectively.

Further, the air introduction pipe 60 of the aspirator 24 is located between the first opening 36 and the second opening 38 of the heat air outlet 34, and the first split door 54 and the second split door 56 of the second switching damper 52. The inlet of the air introduction pipe 60 is arranged so as to be on the upstream side of the heat blower port 34.

Further, as shown in FIG. 1, in the aspirator 24, the introduction portion 64 of the body 58 is on the first division case 26 side (arrow A1 direction), and the outlet portion 66 is on the second division case 28 side (arrow A2 direction). It is provided as follows. Then, the pipe 76 connected to the storage member 78 in which the temperature sensor S is housed is connected to the introduction unit 64.

Furthermore, in the aspirator 24, the seal member 72 mounted on the connection portion 68 of the body 58 abuts on the mounting hole 40, so that the air in the air conditioning case 14 passes between the aspirator 24 and the mounting hole 40. Leakage to the outside is prevented.

Next, the operation of the vehicle air conditioner 10 to which the aspirator 24 is assembled as described above will be described.

First, a case where the cooling operation for lowering the room temperature in the vehicle interior is performed will be described. When an occupant (not shown) operates the operating lever in the vehicle interior to select cooling operation, an actuator (not shown) is driven in response to the operation of the operating lever, and as shown in FIG. 2, the first air mix damper 46 Is rotated to a fully closed state, and the second air mix damper 48 is fully opened.

At the same time, the rotating fan 42 of the blower 16 rotates based on a control signal from a controller (not shown), so that the air sucked into the air conditioning case 14 flows downward along the passage 12, and then the evaporator. By passing through 18, heat is exchanged and cooled to a predetermined temperature.

Then, the cooled air circulates upward without flowing to the heater core 20 side, and then near the occupant's face in the passenger compartment through the vent air outlet 30 opened under the switching action of the first switching damper 50. Is blown to.

Next, when performing a heating operation in which warm air is blown to the vicinity of the occupant's feet in the passenger compartment, the first air mix damper 46 is fully opened with the operation of an operation lever (not shown), and the second air mix damper 48 Rotates and becomes fully closed.

Then, the air blown from the blower 16 and cooled by passing through the evaporator 18 is heated to a predetermined temperature by passing through the heater core 20, and is opened by the second switching damper 52. It is supplied into the vehicle interior from the second openings 36 and 38. At this time, the second switching damper 52 is composed of two first and second split doors 54 and 56 so as to avoid the air introduction pipe 60 of the aspirator 24 provided at the center in the width direction of the air conditioning case 14. Therefore, it does not come into contact with the aspirator 24 when it is rotated.

As described above, during the cooling operation and heating operation, a part of the air that has passed through the evaporator 18 and the air that has passed through the heater core 20 is taken into the inside from the open lower end of the air introduction pipe 60 of the aspirator 24 and the main body. By flowing to the lead-out portion 66 through the inside of the portion 62, a negative pressure is generated inside the main body portion 62 due to the Venturi effect, and the air in the introduction portion 64 and the pipe 76 is sucked by the negative pressure, and the air in the introduction portion 64 and the pipe 76 is sucked accordingly. The air in the vehicle interior where the storage member 78 is installed is sucked into the body 58 of the aspirator 24.

As a result, when the air in the vehicle interior is sucked from the storage member 78 into the aspirator 24 through the pipe 76, the temperature of the air passing through the temperature sensor S (vehicle interior temperature) is detected and output to a controller (not shown). Further, the air in the vehicle interior taken into the body 58 and the air taken in from the air conditioning case 14 are discharged to the vehicle interior through the lead-out unit 66.

As described above, in the present embodiment, in the air conditioning case 14 constituting the vehicle air conditioner 10, the ends of the first and second divided cases 26 and 28 that can be divided in the width direction (arrows A1 and A2 directions). By arranging the aspirator 24 so as to straddle the body 58 and connecting the tubular air introduction pipe 60 opened toward the upstream side to the body 58, for example, a part of the air flowing in the air conditioning case 14 is passed through the air introduction pipe 60. It is possible to reliably guide the aspirator 24 to the body 58 side.

Therefore, even when the internal pressure is low due to low pressure loss in order to reduce the ventilation resistance in the air conditioning case 14, the air flow rate sent from the air conditioning case 14 to the vehicle interior is increased and the flow rate is desired to the aspirator 24. Since the air can flow in, the air inside the vehicle interior (inside air) can be circulated to the installation site of the temperature sensor S at a sufficient flow rate to detect the temperature inside the vehicle interior.

Further, by arranging the open lower end portion of the air introduction pipe 60 in the aspirator 24 on the upstream side of the vent air outlet 30 and the defroster air outlet 32 and in line with the heat air outlet 34, for example, the vent air outlet 30 A part of the air is stabilized from the air introduction pipe 60 to the body 58 regardless of the ventilation mode such as the vent mode in which the air is blown from, the defroster mode in which the air is blown from the defroster air outlet 32, and the heat mode in which the air is blown from the heat air outlet 34. It is possible to take in the flow rate and distribute it. The lower end of the air introduction pipe 60 may be arranged so as to be further upstream than the heat blower port 34.

Further, by arranging the aspirator 24 in the center in the width direction so as to straddle the ends of the first and second split cases 26 and 28 that can be divided, the air conditioning case 14 has a relatively large amount of air and temperature in the center in the width direction. Stable air can be taken into the aspirator 24. Therefore, as compared with the vehicle air conditioner according to the prior art in which the aspirator is installed on the side wall of the case body along the width direction, it is possible to suppress variations in the temperature and the amount of air blown into the aspirator 24. , It can be used by taking in air with a stable air volume and temperature.

Furthermore, the aspirator 24 is configured separately from the air conditioning case 14, and is sandwiched between the first divided case 26 and the second divided case 28, so that the required air flow rate can be easily obtained. It can be replaced with another ejector, and it is easy to assemble.

Further, the aspirator 24 sandwiches the connection portion 68 of the body 58 between the first division case 26 and the second division case 28 via the mounting hole 40, and a pair of pins provided in the air introduction pipe 60. Since the 84a and 84b are fixed by inserting them into the first and second divided cases 26 and 28, the aspirator 24 which is long in the height direction is securely and stably fixed to the air conditioning case 14. At the same time, the assembly workability can be improved.

Further, the air introduction pipe 60 may be formed integrally with the air conditioning case 14.

It should be noted that the vehicle air conditioner according to the present invention is not limited to the above-described embodiment, and of course, various configurations can be adopted without departing from the gist of the present invention.

10 ... Vehicle air conditioner 14 ... Air conditioning case 24 ... Aspirator 26 ... First split case 28 ... Second split case 34 ... Heat air outlet 36 ... First opening 38 ... Second opening 40 ... Mounting hole 52 ... Second switching damper 54 ... 1st split door 56 ... 2nd split door 58 ... Body 60 ... Air introduction pipe 62 ... Main body 64 ... Introduction 66 ... Derivation 82 ... Support S ... Temperature sensor

Claims (3)

In a vehicle air conditioner having an air conditioner having a flow path for air flow and an air outlet, and an ejector provided in the air conditioner case to take in air in the vehicle interior and supply it to a temperature sensor installation unit.
The aspirator includes an air introduction section into which air flowing through the flow path is introduced, and the air introduction section is provided so as to extend along the flow path inside the air conditioning case, and the air conditioning case. Is arranged in the center of the width direction substantially orthogonal to the flow direction of the flow path.
The air outlet has a first air outlet that blows air to the vicinity of the occupant's face in the vehicle interior and a second air outlet that blows air to the vicinity of the occupant's feet, and the second air outlet is a wall portion of the air conditioning case. A vehicle air conditioner comprising first and second openings that are opened in the air and divided into two in the width direction by the air introduction portion. In the vehicle air conditioner according to claim 1,
A vehicle air conditioner characterized in that the inlet of the air introduction portion is arranged so as to be on the upstream side of the air outlet. In the vehicle air conditioner according to claim 1 or 2.
The air-introducing portion is configured separately from the air-conditioning case, and is sandwiched and held between one air-conditioning case that can be divided in the width direction and the other air-conditioning case. ..

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