JPH10329530A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the generation of a noise relating to each two ventilation modes respectively, in an air conditioner which can execute at least two ventilation modes independently. SOLUTION: In a rear air conditioner in which a foot mode for blowing an air from the opening part 44 for the foot blow out of an air conditioner case 1 and a face mode for blowing the air from the opening part 43 for a face blow out are executed, a communication port 33 and communication port open/close door 34 are provided on the air conditioner case 1 and by closing the communication port 33 at the face mode time and opening the communication port 33 at the foot mode time, the pressure loss at the foot mode time is closely resembled to the pressure loss at the face mode time. Therefore, by matching the pressure loss at the face mode time with the fan characteristic of a fan 2, the pressure loss at the foot mode time is also matched with the fan characteristic of the fan 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for accommodating a heat exchanger for air conditioning such as an evaporator, and is particularly suitable for use in an air conditioner for a rear seat of a vehicle (hereinafter referred to as a rear air conditioner). .

[0002]

2. Description of the Related Art Conventionally, in a rear air conditioner, an air-conditioning heat exchanger such as an evaporator and a heater core and a blower are accommodated in an air-conditioning case. The air is blown toward the rear seat side. This air-conditioning case is provided with a foot outlet channel for blowing air toward the occupant's feet via a foot duct, and a face outlet channel for blowing air toward the occupant's upper body via a face duct.

[0003]

In the rear air conditioner, the pressure loss in the foot mode in which air is blown out from the foot outlet channel is reduced by the shape and cross-sectional area of the outlet channel and the duct. It is usually larger than the pressure loss in the face mode in which air is blown from the flow path. This is because the face air outlet in the vehicle interior and the face opening on the air-conditioning case side are communicated with each other by a very long duct, and the pressure loss due to this duct is large.

Usually, in such a rear air conditioner, for example, the pressure loss in the face mode and the fan characteristics of the blower (in other words, the blade width of the fan, the diameter of the fan, the rotation speed of the fan motor, and the like). By performing good matching, it is possible to suppress the occurrence of loud noise due to the frequency interference of the air blown by the blower in the air conditioning case in the face mode.

However, when the mode is switched to the foot mode in which the pressure loss is larger than that in the face mode, there is a problem that the pressure loss in the foot mode does not match well with the fan characteristics of the blower, and loud noise is generated. . The present invention has been made in view of the above problems, and has as its object to suppress generation of noise in each of the two ventilation modes in an air conditioner that independently executes at least two ventilation modes.

[0006]

In order to achieve the above-mentioned object, according to the present invention, the air blow-out section (4) extends from the air suction section (21a) in the air-conditioning case (1).
3 and 44), the air is blown by the blowing means (2), and the air is blown from the air suction part (21a) (43, 4).
In 4), at least the first ventilation mode and the second ventilation mode are individually executed, and the pressure loss in the first ventilation mode is larger than the pressure loss in the second ventilation mode. The pressure loss in the first ventilation mode is approximated to the pressure loss in the second ventilation mode by allowing the blocking member (34) to allow air to flow out of the communication passage (33).

Thus, by matching the pressure loss in the second ventilation mode with the fan characteristics of the blowing means (2), the pressure loss in the first ventilation mode and the fan characteristics of the blowing means (2) are also improved. Because of the matching, noise can be reduced for the two ventilation modes. In the invention described in claim 2, the air blowing section (4
3, 44) include a face blowing channel (43) for blowing air toward the occupant's head and a foot blowing channel (44) for blowing air toward the occupant's feet. A face mode in which air is blown from the face blowing channel (43), and the foot blowing channel (4).
The air outlet mode switching means (47) switches between a foot mode for blowing air from 4), and the first air mode is a foot mode, and the second air mode is a face mode.

As described above, the present invention is suitable for an air conditioner in which switching between the foot mode and the face mode is performed. In the third aspect of the present invention, the permissible shutoff means (34) is an opening / closing member that opens and closes the communication path (33), and has an urging force that closes the communication path (33) in the second ventilation mode. The air-conditioning case (1) is added to the opening / closing member (34) and in the first ventilation mode.
The pressure difference between the inside and outside overcomes the biasing force, and the allowable blocking member (3
4) opens the communication passage (33).

According to this, the opening and closing of the allowable shutoff member (34) is automatically performed by the pressure difference between the inside and outside of the air conditioning case (1), so that the cost is low. In the invention according to claim 4, an air conditioning heat exchanger (32, 42) for air conditioning the air in the air conditioning case (1) is provided in the air conditioning case (1). Since the communication passage (33) is formed on the upstream side of the air flow from (32, 42), unconditioned air flows out of the communication passage (33). Therefore, all of the air-conditioning capacity of the air-conditioning heat exchangers (32, 42) can be used for air-conditioning of the air blown out from the air blowing units (43, 44).

In the invention according to the fifth aspect, the air-conditioning heat exchangers (32, 4) for air-conditioning the air in the air-conditioning case (1).
2) is disposed in the air-conditioning case (1), and forms a communication path (33) downstream of the air-conditioning heat exchangers (32, 42) in the air flow direction. And a blow-out mode switching means (47), and a foot blow-out passage (4).
4) A foot opening / closing door member (47) that opens and closes, and in the foot mode, the foot opening channel (44) is opened by the foot opening / closing door member (34), and the communication passage (33) is opened. It is characterized by.

According to this, since the permissible shut-off member is constituted by the foot opening / closing door member, there is no need to provide a member for opening and closing the communication path, and the cost is reduced. Further, in the invention according to claim 6, there is provided a vehicle air conditioner for performing air conditioning of a rear seat (R) by conditioned air, wherein a side surface between an outer body (11) and an inner body (12) on a vehicle side. Space (1
3) The air conditioning case (1) is arranged, and the air conditioning case (1)
The communication path (33) is characterized in that the inside of the air conditioning case (1) and the side space (13) communicate with each other.

By the way, a typical vehicle air conditioner disposed on the front seat side of a vehicle is disposed in a vehicle cabin so as to cover an instrument panel. Therefore, when the present invention is applied to such a vehicle air conditioner, there is a problem that air escapes from the communication passage into the air conditioning case to the outside of the air conditioning case, blows out into the vehicle interior, and deteriorates the temperature feeling of the occupant.

According to a sixth aspect of the present invention, in the vehicle air conditioner, the air conditioner case is disposed in a side space between the outer body and the inner body on the side of the vehicle, and the communication passage (33) for the air conditioner case is provided. Since the inside of the air conditioning case communicates with the side space, air from the communication passage is blown into the side space. As a result, the temperature feeling of the occupant does not deteriorate as compared with the vehicle air conditioner arranged on the front seat side of the vehicle.

According to the present invention, a communication passage (12a) communicating the vehicle interior with the side space (13) is formed in the inner body (12) so as to face the air suction portion (21a). The air suction part (2) of the air conditioning case (1) is formed.
It is characterized in that the air in the side space (13) is sucked from 1a) and the indoor air is sucked into the side space (13) from the communication passage (12a) of the inner body (12).

As a result, air flows out of the communication passage of the air conditioning case into the side space, and the flown out air is sucked in again from the air suction portion of the air conditioning case. For this reason, when unconditioned air flows out of the communication passage of the air conditioning case, it is possible to suppress the unconditioned air from flowing into the vehicle interior. According to the eighth aspect of the invention, the same effect as that of the sixth aspect of the invention can be obtained in the fifth aspect of the invention.

According to the ninth aspect of the present invention, the duct (51) extending toward the roof (60) of the vehicle is connected to the face blowing channel (43). ), Which is the most downstream side of the air in the passenger compartment (5
1a) is disposed on the roof (60), and the blowout mode switching means (47) is a single door member that changes each opening area of the face blowout flow path (43) and the face blowout flow path (44). (47). In the face mode, the foot outlet flow path (4
4) is completely closed, air is blown out only from the face blowing channel (43), and in the foot mode, the foot blowing channel (44) is fully opened by the door member (47), and the air pressure is higher than in the face mode. By reducing the opening area of the face blowing channel (43), more than half of the conditioned air flowing through the air-conditioning case (1) blows out air from the foot blowing channel (44) and the face blowing flow. Road (43)
The remaining air is leaked out of the air.

As a result, in the foot mode, the conditioned air flowing in the air-conditioning case blows out more than half of the air from the foot outlet flow path 44 as shown by the arrow C in FIG. As shown, the remaining air (how much) leaks out from the face blowing channel 43. For this reason, the pressure loss in the ventilation path can be reduced in the foot mode of the present invention, and the pressure loss in the face mode and the foot mode can be approximated, as compared with the foot mode in which air is blown only to the foot outlet flow path. can do.

As a result, by matching the pressure loss in the face mode with the fan characteristics of the blower, the pressure loss in the foot mode and the fan characteristics of the blower are also matched. Can be reduced. By the way, since the foot mode is a blowing mode used when heating the vehicle interior in winter, warm conditioned air is blown from the foot blowing channel. Then, in a normal vehicle air conditioner, when warm conditioned air is blown from the face blowing channel to the head of the occupant in the foot mode in the foot mode as in this example, the head of the occupant becomes hot and the feeling is worsened. .

However, in the present invention, since the cabin outlet of the face outlet channel is arranged on the roof of the vehicle as described above, a considerable distance is provided between the cabin outlet and the head of the occupant. There is a distance. Therefore, if the conditioned air blown out from the vehicle compartment outlet is minute, it does not reach the head of the occupant. Therefore, in the present invention, focusing on such a thing,
Even in the foot mode, even if air-conditioning air is leaked from the small volume air outlet, the occupant's feeling can be kept good.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) The embodiment of the present invention shown in the drawings will be described below. In the present embodiment, the present invention is applied to a rear air conditioner that blows out conditioned air toward the rear seat R of a so-called one-box type vehicle as shown in FIG.
FIG. 1 shows an overall configuration diagram of the rear air conditioner, and the left-right direction in FIG. 1 coincides with the vehicle front-rear direction.

In FIG. 1, reference numeral 1 denotes a resin air-conditioning case for forming an air flow therein. The air-conditioning case 1 includes a scroll casing 2 constituting a blower (blower unit) 2.
1, a cooler case 31 forming the cooler unit 3 and a heater case 41 forming the heater unit 4, which are disposed between the outer body 11 and the inner body (trim) 12 on the side of the vehicle. .

That is, the air conditioning case 1 is installed in a side space 13 formed between the outer body 11 and the inner body 12, as shown in FIG. On the inner body 12,
A communication port 12a for communicating with the vehicle interior is formed,
A dust filter 14 is provided in the communication port 12a. The outside body 11 has a communication port (not shown) that communicates the side space 13 with the outside of the vehicle compartment.

The blower 2 comprises a centrifugal multi-blade fan (sirocco fan) 22, a fan drive motor 23, and a scroll casing 21. The air suction port 21a of the scroll casing 21 is disposed so as to face the communication port 12a as shown in FIG.
The rotation of the fan 22 causes the air outlet 21 a of the scroll casing 21 to pass through the air outlet 4 described later.
Air is blown toward 3, 44.

The cooler unit 3 is connected to the air flow downstream of the blower 2, and houses an evaporator (cooling heat exchanger, air conditioning heat exchanger) 32 in a cooler case 31. The heater unit 4 is connected to the air flow downstream of the cooler unit 3, and houses a heater core (heating heat exchanger, air conditioning heat exchanger) 42 in a heater case 41. The evaporator 32 constitutes a known refrigeration cycle.

This refrigeration cycle, as shown in FIG.
A compressor 61 that compresses and discharges the refrigerant to a high temperature and a high pressure, a condenser 62 that condenses the refrigerant discharged by the compressor 61, stores the refrigerant condensed in the condenser 62, and mixes the liquid-phase refrigerant with the gas. A receiver (not shown) for separating the phase refrigerant,
Expansion valve (decompression means,
(Not shown), the evaporator 32 for evaporating the refrigerant from the expansion valve, and a refrigerant pipe (not shown) connecting them. The compressor 61 is driven by the engine E.

A front seat air conditioner (hereinafter referred to as a front air conditioner) 7 for air conditioning the front seat side (driver's seat and passenger seat) of the vehicle is provided at the front of the vehicle.
Since the front air conditioner 7 is well known, its description is omitted. The heater core 42 has an engine E inside.
The cooling water flows, and the cooling water is used as a heat source.
2 to heat the air passing therethrough. Then, on the air upstream side of the heater core 42, the proportion of the air that has passed through the evaporator 32 and is blown to the heater core 42,
An air mix door (air mix means) 46 for adjusting the rate of air blown to the bypass passage 45 bypassing the heater core 42 is provided.

Downstream of the air from the heater case 41, a face blowing channel (air blowing portion) 43 for blowing air toward the head of the rear seat occupant, and air toward the foot of the rear seat occupant. Is provided. A face duct 51 (duct portion) made of resin communicates with the face blowing channel 43. The face duct 51 is, as shown in FIG.
And is connected to the face blowing channel 43. At the most downstream side of the face duct 51 in the air, as shown in FIG. 2, a face outlet 51a (vehicle compartment outlet) for blowing air toward the head of the occupant is provided.

In this embodiment, the face outlet 51a is disposed below the roof 60. As a result, air is blown downward from the ceiling portion of the vehicle from the face outlet 51a as shown by an arrow A in FIG. As shown in FIG. 2, a resin foot duct 52 having a foot outlet 52a for blowing air toward the feet of the occupant is connected to the foot outlet channel 44.

The face duct 51 is connected to the inner body 1
The foot outlet 52a is opened to the vehicle interior through a through-hole (not shown) provided in the inner body 12 through a through-hole (not shown) provided in the inner body 12. An air outlet mode switching door (air outlet mode switching means) 47 for switching the air blown out from the air outlet channels 43 and 44 is provided at the upstream side of the air outlet channels 43 and 44. The blowout mode switching door 47 is connected to the face blowout passage 4.
3 and one door member that changes the opening area of each of the face blowing passages 44.

A face mode (first ventilation mode) in which conditioned air is blown out from the face blowing channel 43 and a foot mode (second ventilation mode) in which conditioned air is blown out from the foot blowing channel 44 by the blowing mode switching door 47. mode)
Is switching. In the cooler case 3, a communication port (communication path) 33 is formed on the upstream side of the evaporator 32 and on the outer body 11 side to communicate the inside and outside of the case 3. A mouth opening / closing door (allowable blocking member) 34 is provided near the communication port 33. The communication port opening / closing door 34 is made of an elastically deformable material, for example, hard rubber, and is integrally attached to the cooler case 3 by tapping screws (fastening means) 35 as shown in FIG. Since the communication opening / closing door 34 is made of an elastic material, the tapping screw 35 is provided via the reinforcing plate 36.
Is installed. The operation of the communication opening / closing door 34 will be described later in detail.

An instrument panel (not shown) disposed on the side surface of the rear seat of the vehicle compartment is provided with a mode switch for the rear seat, a blower switch, and a temperature setting switch. In addition, a face mode (ventilation mode) and a foot mode (ventilation mode) are switched by the rear seat mode changeover switch. In addition, the rotation speed of the fan 22 of the blower 2 is set to Lo (low speed), Mi (medium speed), and Hi (high speed) by a blower switch.
By switching to the stage, the blower amount of the blower 2 is switched.

The turning position of the air mix door 46 is linearly switched from the solid line position in FIG. 1 to the dashed line position in FIG. 1 by the temperature setting switch. In the above three modes switched by the blowout mode switching door 47, the rotation position of the air mix door 46 is switched, so that more ventilation modes can be switched.

Here, in this example, the pressure loss in the ventilation path from the foot outlet flow path 44 to the foot duct 52 is:
The pressure loss is larger than the pressure loss in the ventilation path from the face blowing channel 43 to the face duct 51. Further, the pressure loss of the ventilation path when the ventilation air passes through the heater core 4 is naturally larger than the pressure loss of the ventilation path when the ventilation air passes through the bypass passage 45.

Therefore, when the blowout mode switching door 47 is in the foot mode position, the pressure loss is larger than in the face mode position. Further, even when the blowout mode switching door 47 is in the foot mode position or the face mode position, the pressure loss changes by switching the rotation position of the air mix door 46, that is, the air mix door 46.
Moves from the position indicated by the solid line in FIG. 1 to the position indicated by the alternate long and short dash line in FIG. 1, the pressure loss decreases.

In all the ventilation modes switched by the air outlet mode switching door 47 and the air mixing door 46, the foot mode and the maximum heating mode (the air flow at this time is indicated by an arrow A in FIG. 1). ,Less than,
The pressure loss in the face mode and the maximum cooling mode (the air flow at this time is indicated by an arrow B in FIG. 1; hereinafter, referred to as the second mode) is the largest. small. The pressure loss in the second mode and the rotation speed of the blower 2 are Hi.
The noise in the second mode is reduced by matching the fan characteristic of the blower 2 at the time of the second mode.

The above-mentioned noise increases in proportion to the amount of air blown by the blower 2. Therefore, when the amount of air blown by the blower 2 is small (in other words, when the rotation speed of the blower 2 is Mi, L
In the case of (o), the noise is reduced as compared to when the air blowing amount is large, even if the matching is not particularly performed. Then, in the second mode, the communication port opening / closing door 34 closes the communication port 33, and in a mode other than the second mode (that is, in a mode in which the pressure loss is larger than that in the second mode), the communication is performed. The opening / closing door 34 opens the communication port 33.

That is, in the second mode, the pressure difference between the pressure in the space C between the downstream of the blower 2 and the upstream of the evaporator 32 and the pressure outside the case 3 indicates that the communication port opening / closing door 3
The elastic force (biasing force) of 4 itself overcomes the pressure difference, and the communication port opening / closing door 34 comes into close contact with the communication port 33 and closes the communication port 33. In the pressure difference in a mode other than the second mode, the pressure difference overcomes the elastic force of the communication port opening / closing door 34 itself, and the communication port opening / closing door 34 becomes the communication port 33.
, And open the communication port 33. This communication opening / closing door 34
Is increased in proportion to the pressure of the space C.

Next, the operation of the present embodiment in the above configuration will be described. First, when the face blowing mode is set by the blowing mode switch and the maximum cooling is set by the temperature setting switch, the air mix door 46 is turned to the position shown by the dashed line in FIG. 1 and the bypass passage 45 is fully opened. At the same time, the blowout mode switching door 47 rotates to the position shown by the dashed line in FIG. 1 to fully open the face blowout passage 43. As a result, the blown air of the blower 2 is cooled by the evaporator 32 to become cool air, and all of the cool air is blown out from the face blowing channel 43 through the duct 51 toward the head of the occupant of the rear seat, and the rear seat side Perform cooling.

When the foot blowing mode is set by the blowing mode switch and the maximum heating is set by the temperature setting switch, the air mix door 46 is turned to the position shown by the solid line in FIG. At the same time, the outlet mode switching door 47 is rotated to the position shown by the solid line in FIG. 1 to fully open the foot outlet flow path 44. As a result,
After the air blown by the blower 2 passes through the evaporator 32, all the air is heated by the heater core 42 to become hot air, and this hot air is blown out from the foot outlet channel 44 through the duct 52 toward the feet of the occupant of the rear seat. Heat the rear seats.

Next, the second mode (the maximum cooling mode and the face mode) is selected, and the rotation speed of the blower 2 is changed from Hi to a mode other than the second mode (for example, the first mode). The operation at the time of switching will be described. First, in the second mode, as described above, the communication port opening / closing door 34 is in a state where the communication port 33 is closed. By switching from this state to the first mode,
The pressure in the space C rises, and the communication port opening / closing door 34 opens the communication port 33 in accordance with the pressure increase. As a result, the air in the space C can escape to the side space 13 from the communication port 33, so that the pressure loss in the first mode is reduced to the second mode.
It can be approximated to the pressure loss in the mode. Therefore, the first
The pressure loss in the mode and the fan characteristics of the blower 2 match, and noise can be reduced.

The pressure in the space C increases as the amount of air blown by the blower 2 increases. For this reason, when the rotation speed of the blower 2 is Mi or Lo, the pressure in the space C is greatly reduced. Therefore, the communication port opening / closing door 34 cannot open the communication port 33 due to a pressure difference between the space C and the outside of the case 1. Make it not exist. In addition, the communication opening / closing door 34 is connected to the space C and the case 3.
As described above, the communication port 33 is automatically opened and closed by a pressure difference between the outside (side space 13) and the communication port opening / closing door 34.
Does not require special control and is inexpensive.

Since the communication port 33 is on the upstream side of the evaporator 32 and the heater core 42, unconditioned air before being air-conditioned by the evaporator 32 and the heater core 42 flows from the communication port 33 to the outside of the case 1 (side space 13). Will be leaked. Therefore, all the air-conditioning capabilities of the evaporator 32 and the heater core 42 can be used for air-conditioning of the air blown out from the blow-out channels 43 and 44.

Further, as described in the means for solving the above problem, the air from the communication port 33 is blown into the side space 13. As a result, the temperature feeling of the occupant does not deteriorate as compared with the vehicle air conditioner arranged on the front seat side of the vehicle. Further, if the conditioned air cooled by the evaporator 32 flows out to the side space 13, there is a possibility that dew condensation may occur on the surface of the inner body 12 on the vehicle interior side. In the present embodiment, uncooled air flows out. Therefore, there is no such fear.

The air flowing out of the communication port 33 into the side space 13 is sucked again through the air suction port 21a of the scroll casing 21 or a communication port (not shown) with the outside formed in the outer body 11. From the outside of the cabin, it is possible to prevent unconditioned air from leaking into the cabin,
It is possible to suppress hindering the air conditioning in the passenger compartment. Further, since the communication port 33 is formed on the outer body 11 side, that is, on the opposite side of the communication port 12a of the inner body 12, the unconditioned air flowing out therefrom is further suppressed from leaking from the communication port 12a into the vehicle interior. it can.

Further, the amount of air blown out from the foot outlet flow path 44 (that is, the foot outlet 52a) is reduced by the amount of the air leaking from the communication port 33, but in the heating mode such as the first ventilation mode. However, it does not matter much if the amount of blown air is reduced. (Second Embodiment) In the first embodiment, the communication port 33 is formed upstream of the evaporator 32 and the heater core 42 in the air flow direction.
It was formed more downstream of the air flow. FIG. 4 is a diagram showing a main part of the present example, and is a partial view of the heater core 42 in FIG.

As shown in FIG. 4, the communication port 33 is formed in the vicinity of the upstream side of the foot outlet flow path 44 on the air side. More specifically, in the face mode, the blowout mode switching door 47 closes the inlet 44a of the foot blowout flow path 44, but the communication port 33 is formed downstream of the inlet 44a in the air. ing. Therefore, in the present embodiment, in the foot mode, the air flow to the communication port 33 is permitted by opening the foot outlet channel 44 by the outlet mode switching door 47 (foot opening / closing door member. On the other hand, in the face mode. The air flow to the communication port 33 is shut off by opening the face air flow passage 43 and closing the foot air flow passage 44 by the air blow mode switching door 47.

As a result, there is no need to provide a communication port opening / closing door 34 in addition to the blowing mode switching door 47 as in the first embodiment, and the cost is reduced. Further, as shown in FIG. 4, the blowout mode switching door 47 of this embodiment has
7a is a buff-tie type door having two door portions 47b and 47c, and the door portion 4 in the foot mode.
7 b is disposed to face the communication port 33 and obstructs the flow of air to the communication port 33. In this example, by doing so, the amount of air blown out to the communication port 33 is limited.

(Third Embodiment) In each of the above embodiments, air is allowed to escape from the communication port 33 to the side space 13 in order to approximate the pressure loss in the foot mode. Instead, it was blown out to the face blow-out channel 43. FIG. 5 shows the operation position of the door 47 in the foot mode of this example.

In the face mode, the outlet mode switching door 47 completely closes the foot outlet channel 44 and blows air only from the face outlet channel 43. On the other hand, in the present embodiment, as shown in FIG. 4, the communication port 33 is not separately provided as in each of the above-described embodiments, and the face mode flow path 43 is completely closed by the mode switching door 47 in the foot mode. Instead, slightly open. Thus, in the foot mode, the outlet mode switching door 47 fully opens the foot outlet channel 44, and makes the opening area of the face outlet channel 43 smaller than in the face mode.

Therefore, in the foot mode, the air conditioning case 1
The air-conditioning air flowing in the inside, more than half of them
5, the air is blown out from the foot blowout flow path 44, and the remaining air (how much) leaks out from the face blowout flow path 43 as shown by an arrow B in FIG. For this reason, the pressure loss of the ventilation path can be smaller in the foot mode of the present example than in the foot mode in each of the above embodiments, and the pressure loss in the face mode and the pressure loss in the foot mode can be approximated.

Since the foot mode is a blowing mode used for heating the vehicle interior in winter, warm air-conditioning air is blown from the foot outlet 52a. In a normal vehicle air conditioner, when warm conditioned air is blown from the face air outlet 51a to the occupant's head in the foot mode in the foot mode as in this example, the occupant's head is illuminated and the feeling deteriorates.

However, in this embodiment, since the face outlet 51a is disposed on the roof 60 of the vehicle as described above,
There is a considerable distance between the face outlet 51a and the occupant's head (rear seat). Therefore, face outlet 5
If the conditioned air blown out from 1 is very small, it does not reach the occupant's head. Therefore, in this example, even if the conditioned air leaks from the minute amount face air outlet 51a in the foot mode, the occupant's feeling can be kept good. (Other Embodiments) First, in the first embodiment, the communication port opening / closing door 34 that opens and closes according to the pressure difference is used. A door may be used. In this case, it is necessary to set the opening degree of the door according to each ventilation mode. For example, when the air flow rate is Hi and the foot mode (when air flows through the foot duct 52 with a higher pressure loss) is used. When the air mix door 46 moves within a predetermined range from the maximum cooling position (for example, about ３ of the maximum cooling position side of the entire rotation range of the door 46), the position of the door 46 is The opening of the communication port opening / closing door 34 is linearly adjusted.

In addition to the above modes, a defroster mode or the like may be executed. In this case as well, the fan characteristics are matched to the pressure loss in the mode with the smallest pressure loss in all the modes, and the communication port 33 is opened in the mode other than the mode with the minimum pressure loss, so that the pressure loss in the mode other than the mode with the minimum pressure loss is reduced. Is approximated to the pressure loss in the minimum pressure loss mode.

When the pressure loss does not change significantly depending on the switching position of the air mixing door 46, the switching position of the blowing mode switching door 47 (for example, the position in the foot mode, the face mode, or the bi-level mode) corresponds to the switching position. The communication port opening / closing door may be opened / closed (for example, fully open, fully closed, half open). In the above embodiment, the present invention may be applied to a configuration in which the heater core 4 and the air mix door 46 are eliminated. In this case, since the pressure loss of the ventilation path changes depending on the position of the blowout mode switching door 47, the opening of the communication port 33 is adjusted according to the position of the door 47.

In the above-described embodiment, one of the blow-out passages 43 and 44 is eliminated, and an air conditioner in which two ventilation modes are switched by means other than the blow-out mode switching door 47 (for example, the air mix door 46). The present invention may be applied to The communication port 33 communicates with the upstream side of the evaporator 32, but may communicate with the downstream side of the evaporator 32. For example, it may be connected downstream of the evaporator 32 and upstream of the heater core 4. According to this, similarly to the above embodiment, the pressure loss can be approximated for each ventilation mode, and noise can be reduced.

Further, at the edge of the communication port 33, a protruding portion projecting toward the communication port opening / closing door 34 in a character shape may be formed. Since the communication port opening / closing door 34 made of hard rubber is in close contact with the protruding portion, the sealing property between the communication port opening / closing door 34 and the communication port 33 can be improved. Further, the communication port opening / closing door 34 may be operated as described above by an urging member (for example, a spring member) that applies an urging force corresponding to the predetermined pressure in a direction to close the communication port opening / closing door 34, or the predetermined pressure. A spring steel or the like that opens and opens the communication port 33 by being reversed when the above pressure is applied may be used.

In the rear air conditioner, when the evaporator 32 and the heater core 42 are eliminated and a part of the conditioned air of the front air conditioner is introduced into the case of the rear air conditioner, the pressure loss in the face mode is the smallest. By releasing the pressure loss in the bi-level mode and the foot mode, the pressure loss in all the modes may be made uniform and the noise may be reduced.

Although the present invention has been applied to the rear air conditioner, it may be applied to a front air conditioner.

[Brief description of the drawings]

FIG. 1 is an overall view of a rear air conditioner according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a state in which the rear air conditioner according to the first embodiment of the present invention is mounted on a vehicle.

FIG. 3 is a detailed view of the rear air conditioner according to the first embodiment of the present invention.

FIG. 4 is a detailed view of a rear air conditioner according to a second embodiment of the present invention.

FIG. 5 is a detailed view of a rear air conditioner according to a third embodiment of the present invention.

[Description of Signs] 1 ... air-conditioning case, 21a ... air suction port (air suction section),
2: Blower (blower means), 43: Face blowing channel (air blowing unit), 44: Foot blowing channel (air blowing unit), 33: communication port (communication path), 34: communication port opening / closing door ( Tolerable shutoff).

Claims (9)

[Claims] An air conditioning case (1) having an air suction part (21a) and an air blowing part (43, 44); and an air blowing part (21) from the air suction part (21a) in the air conditioning case (1). 43, 44), and at least a first ventilation mode and a second ventilation mode from the air suction part (21a) of the air conditioning case (1) to the air blowing part (43, 44). The ventilation mode is executed independently, and the pressure loss of the ventilation path in the first ventilation mode is reduced to the second
In an air conditioner having a pressure loss greater than a pressure loss in a ventilation path in a ventilation mode, a communication path (33) communicating between the inside and the outside of the air conditioning case (1).
And an allowance shutoff member (34) for allowing and shutting off the air in the air conditioning case (1) to the outside of the air conditioning case (1) through the communication path (33), and in the first ventilation mode By allowing the outflow of air from the communication passage (33) by the permissible blocking member (34), the pressure loss in the first ventilation mode is approximated to the pressure loss in the second ventilation mode. An air conditioner characterized by: 2. The air blowing section (43, 44) includes a face blowing channel (43) for blowing air toward an occupant's head, and a foot for blowing air toward a foot of the occupant. A face mode in which air is blown only from the face blowout channel (43), and a foot mode in which air is blown out from at least the foot blowout channel (44). The air conditioner according to claim 1 or 2, further comprising a blow mode switching means (47) for switching, wherein the first ventilation mode is the foot mode, and the second ventilation mode is the face mode. . 3. The opening / closing member for opening / closing the communication passage (33), wherein the biasing force for closing the communication passage (33) in the second ventilation mode is applied to the opening / closing member. In the first ventilation mode, a pressure difference between the inside and outside of the air conditioning case (1) overcomes the urging force, and the opening / closing member (34) is connected to the communication passage (33). The air conditioner according to claim 1, wherein the air conditioner is opened. 4. An air-conditioning heat exchanger (32, 42) for air-conditioning the air in the air-conditioning case (1) is disposed in the air-conditioning case (1). The air conditioner according to any one of claims 1 to 3, wherein the communication passage (33) is formed on an upstream side of the air flow from the air passage (42). 5. An air-conditioning heat exchanger (32, 42) for air-conditioning the air in the air-conditioning case (1) is provided in the air-conditioning case (1). The air-conditioning heat exchanger (32, 4
2) The downstream side of the air flow is formed in the foot outlet flow path (44), and the permissible shutoff member (47) forms the outlet mode switching means (47), and the foot outlet flow A foot opening / closing door member (47) for opening / closing a road (44); and in the foot mode, the foot opening / closing door member (4).
7) opening the foot outlet flow path (44) allows air flow to the communication path (33), and in the face mode, the foot opening / closing door member (4)
The air flow to the communication path (33) is shut off by opening the face air flow path (43) and closing the foot air flow path (44) at 7). The air conditioner according to claim 2. 6. A rear seat (R) formed by conditioned air generated by the air conditioner according to claim 1.
An air conditioner for a vehicle that performs air conditioning of the vehicle, wherein the air conditioning case (1) is disposed in a side space (13) between an outer body (11) and an inner body (12) on a side of the vehicle. (1) The vehicle air conditioner, wherein the communication passage (33) communicates the inside of the air conditioning case (1) with the side space (13). 7. A communication path (12a) communicating the vehicle interior and the side space (13) with the inner body (12).
Is formed so as to face the air suction portion (21a). The air in the side space (13) is sucked from the air suction portion (21a) of the air conditioning case (1), and the inner body (12) is formed. The air conditioner for a vehicle according to claim 6, wherein indoor air is sucked into the side space (13) from the communication passage (12a). 8. A vehicle air conditioner for performing air conditioning of a rear seat (R) by conditioned air generated by the air conditioner according to claim 5, wherein an outer body (11) and an inner body (11) on the side of the vehicle. The air conditioning case (1) is disposed in a side space (13) between the air conditioning case (1) and the communication path (33) of the air conditioning case (1). ) Is connected to the vehicle air conditioner. 9. An air-conditioning case (1) having an air suction part (21a) and an air blowing part (43, 44); and the air blowing part (21) from the air suction part (21a) in the air-conditioning case (1). An air blowing means (2) for blowing air to the occupant's head; and a face blowing channel (43) for blowing air toward the head of the occupant.
A face mode for blowing air only from the face blowing channel (43) including a foot blowing channel (44) for blowing air toward the foot of the occupant; and at least the foot blowing channel (44). 44) a blowing mode switching means (47) for switching between a foot mode in which air is blown out from the airflow mode, and a pressure loss in the ventilation path in the face mode.
An air conditioner for a vehicle, which is larger than a pressure loss of a ventilation path in the foot mode and air-conditions a rear seat (R), wherein the face outlet passage (43) is provided in a vehicle roof (60). A duct (51) extending toward the vehicle is connected, and a vehicle interior air outlet (51a), which is the most downstream air side of the duct (51), is disposed on the roof (60). The means (47) includes the face blowing channel (43) and the face blowing channel (44).
In the face mode, the foot outlet flow path (44) is completely closed by the door member (47), and the face Air is blown out only from the blowing channel (43). In the foot mode, the foot blowing channel (44) is fully opened by the door member (47), and the face blowing is performed more than in the face mode. Channel (43)
Air-conditioning case (1)
A vehicle characterized in that at least half of the conditioned air flowing through the inside blows air out of the foot outlet flow path (44) and the remaining air leaks out of the face outlet flow path (43). Air conditioner.