JP2002200911A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle capable of achieving a simple structure to reduce the number of parts, and improving heat efficiency to reduce power consumption. SOLUTION: The conditioner comprises a blower 3, an outside air introducing passage 15 to introduce outside air to the blower 3, a heat exchanger 4 for cooling disposed on the downstream side of the blower 3, a heat exchange 5 for heating, and air blow passages 8, 9, and 10 to properly feed air sent from the heat exchanger 4 for cooling and the heat exchanger 5 for heating to the inside. In the outside air introducing passage 15, an inside air introducing passage 17 capable of exchanging heat through a heat exchanger 16 is provided. The downstream side of the heat exchanger 16 on the inside air introducing passage 17 is combined with the outside air introducing passage 15. A heat loss can be thus restricted low without discharging inside air. A special blower or the like is not required for introducing inside air, the structure is so simple that the number of parts can be reduced, and power consumption can be reduced in this air conditioner for a vehicle.

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 a vehicle, and more particularly, to an air conditioner for a vehicle having a high heating effect capable of taking in latent heat of air in a vehicle compartment into the outside air.

[0002]

2. Description of the Related Art Conventionally, as this type of vehicle air conditioner, one disclosed in Japanese Patent Application Laid-Open No. 10-16531 as shown in FIG. 7 is known. The vehicle air conditioner 100 includes a first air passage 104 extending from an outside air inlet 102 to a defroster outlet air passage 103 and a second air passage 104 extending from an inner air inlet 105 to a foot outlet air passage 106.
Ventilation path 107 and inside air discharge path 1 for discharging inside air out of the vehicle compartment
08. The vehicle air conditioner 100
In a mode in which outside air is introduced into the first air passage 104 and inside air is introduced into the second air passage 107, heat is absorbed from inside air that is introduced and sent from the inside air discharge blower 110 and flows through the inside air discharge passage 108, and the outside air inlet 102. And a heat exchanger 109 for radiating heat to the outside air introduced from the outside. The first air passage 104
And the air flowing through the second ventilation path 107
The air is sent by a blower 111 having 11A and 111B. As described above, in the vehicle air conditioner 100 illustrated in FIG. 7, the heat of the inside air is increased by absorbing the heat of the inside air and radiating the heat to the outside air by using the heat exchanger 109, thereby increasing the temperature of the outside air. The loss is reduced to improve the heating effect.

Further, as another conventional example, an air conditioner for a vehicle provided with one blower as shown in FIG. 8 is known. The vehicle air conditioner 200 has an outside air inlet 2
02 to the defroster outlet air passage 203
An air passage 204, a second air passage 207 extending from the inside air inlet 205 to the foot outlet air passage 206, and an inside air discharge passage 208 for discharging inside air to the outside of the vehicle compartment are provided. Further, in the vehicle air conditioner 200, when in a mode in which outside air is introduced into the first air passage 204 and inside air is introduced into the second air passage 207, the air is introduced from the inside air introduction port 205 and sent out from the fan 211 B of the blower 211. The heat exchanger 209 absorbs heat from the inside air flowing through the inside air discharge passage 208 and releases heat to the outside air introduced from the outside air inlet 202. The first
The air flowing through the air passage 204 and the second air passage 207 is 1
Fan 21 for introducing outside air provided in two blowers 211
1A and a fan 211B for exhausting inside air. The outside air and the inside air are partitioned by a partition 212 formed in the unit case.

[0004]

However, in the vehicle air conditioner 100 shown in FIG. 7, in addition to the air conditioner blower 111, an inside air discharge blower 110 for sending out the inside air to the heat exchanger 109 is provided. This necessitates the problem that the device unit becomes large and heavy, and the power consumption increases.

[0005] The vehicle air conditioner 2 shown in FIG.
00, one blower 211 has a fan 2 for introducing outside air.
11A and a fan 211B for exhausting inside air are provided in two stages, and a partition 212 for separating outside air and inside air sent by the respective fans 211A and 211B is provided in the unit case. There is a problem that becomes.

Further, in the vehicle air conditioners 100 and 200 shown in FIGS. 7 and 8, since the inside air is discharged to the outside of the passenger compartment, there is a problem that the heat efficiency is deteriorated accordingly and the heating efficiency is lowered.

Accordingly, an object of the present invention is to provide an air conditioner for a vehicle which has a simple structure, can reduce the number of parts, can increase thermal efficiency and can reduce power consumption.

[0008]

According to the first aspect of the present invention,
A blower, an outside air introduction passage for introducing outside air to the blower, a cooling heat exchanger arranged downstream of the blower, a heating heat exchanger arranged downstream of the cooling heat exchanger, and a cooling heat exchanger. An air conditioner for a vehicle having a heat exchanger and an air blowing passage for appropriately sending air sent from a heating heat exchanger to the indoor side, wherein heat can be exchanged to an outside air introduction passage via a heat exchanger. The inside air introduction passages intersecting each other and the downstream side of the heat exchanger in the inside air introduction passage can be joined to the outside air introduction passage.

According to the first aspect of the present invention, the inside air introduced from the inside air introduction passage has a function of imparting latent heat to the outside air in the heat exchanger to warm the outside air introduced into the room. Further, by joining the inside air to the outside air introduction passage, the inside air is not discharged to the outside of the vehicle compartment, and the heat is not discarded. For this reason, heating efficiency can be improved.

According to a second aspect of the present invention, there is provided the air conditioner for a vehicle according to the first aspect, wherein the downstream side of the heat exchanger in the inside air introduction passage is upstream of the heat exchanger in the outside air introduction passage. It is characterized by merging. On the other hand, claim 3
The described invention is characterized in that the downstream side of the heat exchanger in the inside air introduction passage joins on the downstream side of the heat exchanger in the outside air introduction passage.

Therefore, according to the second and third aspects of the present invention, by joining the inside air to the outside air introduction passage without discharging the inside air, it has the effect of suppressing heat loss and increasing the heating efficiency.

Further, the invention according to claim 4 is the invention according to claim 1.
The vehicle air conditioner according to any one of claims 3 to 3, wherein the inside air introduction passage is controlled in air volume by an opening / closing door.

Therefore, according to the fourth aspect of the present invention, it is possible to control the humidity by controlling the flow rate of the inside air introduced into the outside air introduction passage by the opening / closing door.

According to a fifth aspect of the present invention, there is provided the air conditioner for a vehicle according to any one of the first to fourth aspects, wherein the inside air introduction passage is disposed downstream of the heat exchanger. The circulation discharge switching door can communicate with the inside air discharge passage.

Therefore, according to the fifth aspect of the present invention, it is possible to discharge the inside air to the outside of the vehicle according to the humidity of the inside air, and there is an action of warming the outside air and an action of adjusting the humidity.

[0016]

According to the first aspect of the present invention, the inside air introduced from the inside air introduction passage imparts latent heat to the outside air in the heat exchanger to warm the outside air introduced into the room, thereby increasing the heating efficiency. is there. Further, at the time of heating with low outside air, the heating load can be reduced by re-mixing the temperature-controlled inside air (room air) while keeping the indoor humidity low by introducing and heating the outside air. Furthermore, since the inside air is dehumidified by heat exchange between the low outside air and the inside air, there is an effect of reducing the humidity of the mixed inside air.

According to the second and third aspects of the invention, there is an effect that the heat loss is suppressed and the heating efficiency is increased. In addition, since the outside air and the inside air passing through the heat exchanger are sucked by the negative pressure generated in the downstream of the heat exchanger by the operation of the blower,
There is an effect that heat exchange between the inside air and the outside air can be performed without using a dedicated blower.

According to the invention described in claim 4, there is an effect that the humidity can be controlled by controlling the flow rate of the inside air introduced into the outside air introduction passage by the opening / closing door.

According to the fifth aspect of the present invention, the inside air can be discharged to the outside of the vehicle according to the humidity of the inside air, so that the heating effect is enhanced and the air conditioning humidity can be easily adjusted.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of an air conditioner for a vehicle according to the present invention will be described below based on embodiments shown in the drawings.

(Embodiment 1) FIG. 1 is an explanatory view showing a vehicle air conditioner 1 according to Embodiment 1 of the present invention. As shown in FIG. 1, the vehicle air conditioner 1 includes a blower (blower) 3 and a cooling heat exchanger (evaporator) in a unit case 2 forming an air passage for sending air toward a vehicle interior. 4 and a heat exchanger (heat core) 5 for heating. The cooling heat exchanger 4 is arranged downstream of the blower 3. Further, the heating heat exchanger 5 is disposed downstream of the cooling heat exchanger 4. Further, an air mix door 6 that distributes air passing through the cooling heat exchanger 4 is provided downstream of the cooling heat exchanger 4. Downstream of the air mix door 6 and the heating heat exchanger 5, an air mix chamber 7 for mixing cold air and hot air is formed. The wind that has passed through the air mix chamber 7 is controlled by opening and closing doors 11, 12, and 13 that open and close the passages 8, 9, and 10 that communicate with various outlets. , 10 as appropriate. Incidentally, the passage 8 is set so as to communicate with the defroster opening, the passage 9 is set so as to communicate with the ventilator duct, and the passage 10 is set so as to communicate with the foot opening.

As shown in FIG. 1, the blower 3 has
An opening / closing door 14 for controlling introduction of outside air or inside air is provided. The outside air introduction passage 1 is located upstream of the blower 3.
5 are provided. A heat exchanger 16 is arranged in the middle of the outside air introduction passage 15.

Further, an inside air introduction passage 17 for introducing inside air from the vehicle interior is connected to the outside air introduction passage 15 via a heat exchanger 16 so as to intersect. One end of the inside air introduction passage 17 is connected to an inside air introduction port 18 that opens into the vehicle interior.
Is in communication with A side of the inside air introduction passage 17 that has passed through the heat exchanger 16 is a bent passage 17A, and an end of the bent passage 17A is connected to the outside air introduction passage 15 that intersects the inside air introduction passage 17 of the heat exchanger 16. Are connected to join.

An inside air inlet 19 opened to the unit case 2 is provided downstream of the heat exchanger 16 in the outside air introduction passage 15. The inside air inlet 19 is controlled to be opened and closed by an opening and closing door 14. The opening and closing door 14 can also control opening and closing of the outside air introduction passage 15 of the heat exchanger 16.

FIG. 2 is a perspective view showing the heat exchanger 16 used in the vehicle air conditioner 1 according to the first embodiment. This heat exchanger 16 has flow paths in directions orthogonal to each other,
The orthogonal flow paths perform only heat exchange without merging with each other.

In the first embodiment, the inside air that has passed through the heat exchanger 16 is set so as to pass through the bent passage 17A shown in FIG. By allowing the outside air and the inside air to pass through such a heat exchanger 16, the temperature of the outside air passes through the heat exchanger 16 as shown in FIG. 3 in the vehicle air conditioner 1 according to the first embodiment having the configuration. As a result, the air is heated to a predetermined temperature, and the warmed outside air and the joined inside air are introduced into the blower 3 side. Further, the opening degree of the opening / closing door 14 may be controlled in accordance with the air conditioning mode, and the inside air may be introduced from the inside air inlet 19. Other configurations of the vehicle air conditioner 1 according to the first embodiment are the same as those of the known configuration, and the cooling heat exchanger 4, the heating heat exchanger 5, and the opening and closing doors 11 and 12 are selected according to the air conditioning mode. , 13 are appropriately controlled.

Condensed water generated by heat exchange between the low outside air and the inside air is discharged to the outside of the vehicle through a drain passage (not shown).

In such a vehicle air conditioner 1, the opening / closing door (inside / outside air selection door) 1 of the outside air introduction passage 15 is provided.
A heat exchanger 16 is arranged upstream of the heat exchanger 4. In the outside air introduction passage 15, the outside air sucked from the outside air by one blower 3 and the heat exchanger 16 which is taken in by the generation of a negative pressure in the bent passage 17 </ b> A communicating with the outside air introduction passage 15 are taken.
Is merged with the inside air passing through the outside air introduction passage 15. Therefore, the inside air is not taken into the outside air introduction passage 15 and discharged. In addition, heat exchanger 1
In No. 6, the outside air is warmed by the latent heat of the inside air. For this reason, in the first embodiment, since the inside air is not discharged, the waste of heat is reduced, and an efficient heating effect can be obtained.

Further, during heating with low outside air, the heating load can be reduced by re-mixing the inside air (room air) whose temperature is controlled while keeping the indoor humidity low by introducing and heating the outside air. Furthermore, since the inside air is dehumidified by the heat exchange between the low outside air and the inside air, there is an effect of reducing the humidity of the mixed internal rule.

(Embodiment 2) FIG. 4 is an explanatory diagram showing a main part of a vehicle air conditioner according to Embodiment 2 of the present invention. In the second embodiment, the same portions as those of the vehicle air conditioner 1 of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In this vehicle air conditioner 1, as shown in FIG.
The downstream of the heat exchanger 16 in the inside air introduction passage 17 intersecting with 5 is provided so as to join the downstream of the heat exchanger 16 in the outside air introduction passage 15. Therefore, in the second embodiment, there is no bent passage 17A as in the first embodiment, and the end surface 16A of the inside air introduction passage 17 of the heat exchanger 16 is directly exposed to the outside air introduction passage 15. The other configuration of the second embodiment is the same as that of the vehicle air conditioner 1 of the first embodiment.

In the second embodiment, as in the first embodiment, the inside air is not taken into the outside air introduction passage 15 and discharged. The heat exchanger 16 has an effect of warming the outside air by the latent heat of the inside air. For this reason, also in the second embodiment, since the inside air is not discharged, the waste of heat is reduced, and an efficient heating effect can be obtained.

(Embodiment 3) FIG. 5 shows a main part of a vehicle air conditioner according to Embodiment 3 of the present invention. In the third embodiment, the same parts as those of the vehicle air conditioner 1 of the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted.

The vehicle air conditioner 1 according to the third embodiment includes:
An opening / closing door 20 that opens and closes an end surface 16A of the inside air introduction passage 17 in the heat exchanger 16 of the vehicle air conditioner 1 according to Embodiment 2 is provided. In addition, the cooling heat exchanger 4
The temperature sensor 21 is arranged near the downstream side of. In addition,
Other configurations in the third embodiment are the same as those in the first embodiment.
The description is omitted here.

In the third embodiment, the flow rate of the inside air introduced into the outside air introduction passage 15 downstream of the heat exchanger 16 from the end face of the inside air introduction passage 17 in the heat exchanger 16 is controlled by the opening / closing door 2.
It can be controlled with 0. In addition, the air volume of the outside air and inside air introduced into the outside air introduction passage 15 (inside / outside air ratio)
Is a temperature sensor 21 disposed near the cooling heat exchanger 4.
Alternatively, control is performed such that a vehicle speed sensor, an AMB sensor, an INC sensor, and the like (not shown) reach a temperature condition in which window fogging does not occur. In the third embodiment, the orthogonal heat exchanger 16 is used.
A temperature sensor or an indoor humidity sensor is separately provided in the vicinity of the outside, and information from these sensors is used to introduce the outside air and inside air flow rates (inside / outside air ratio) introduced into the outside air introduction passage 15.
May be reflected in the determination.

In the third embodiment, with such a configuration, for example, when the temperature difference between the inside air and the outside air is small (for example, when the glass temperature is not sufficiently heated at the beginning of heating), the indoor air is passed through the heat exchanger. Since dehumidification can be performed at 16, the occurrence of window fogging can be suppressed.

(Embodiment 4) FIG. 6 shows a main part of a vehicle air conditioner according to Embodiment 4 of the present invention. In the fourth embodiment, the same components as those of the vehicle air conditioner 1 of the first to third embodiments are denoted by the same reference numerals, and the description thereof will be omitted.

The vehicle air conditioner 1 according to the fourth embodiment includes:
A rotating door (circulation discharge switching door) 22 is disposed on the downstream side of the inside air introduction passage 17 where the inside air has passed through the heat exchanger 16, and an inside air discharge passage 23 for discharging the inside air to the outside of the vehicle by the rotating door 22, and an outside air introduction passage. The air can be distributed to the passage 15. As a result, it is possible to switch between the case in which the inside air is returned to the room and the case in which the inside air is discharged to the outside of the vehicle by the rotating door 22. In addition, an in-vehicle humidity sensor 24 is arranged near the inside air inlet 18. The other configuration of the fourth embodiment is the same as that of the first embodiment.

In Embodiment 4 having such a configuration,
For example, when the number of occupants is small or when the inside air humidity is low, the revolving door 22 blocks the inside air discharge passage 23. Conversely, when the number of occupants is large or the inside air humidity is high, the revolving door 22 is used. The inside air may be prevented from entering the outside air introduction passage 15 so as to exhaust the inside air passing through the heat exchanger 16. Such control can be performed based on the detection value of the in-vehicle humidity sensor 24 or the like, and the humidity detection data may be input to the air conditioning control unit.

Although the first to fourth embodiments have been described above, the present invention allows various design changes accompanying the gist of the configuration.

[Brief description of the drawings]

FIG. 1 is a first embodiment of a vehicle air conditioner according to the present invention.
FIG.

FIG. 2 is a perspective view of the heat exchanger used in the first embodiment.

FIG. 3 is a diagram showing a temperature change of outside air passing through a heat exchanger in the first embodiment.

FIG. 4 is a second embodiment of the vehicle air conditioner according to the present invention.
FIG.

FIG. 5 is a third embodiment of the vehicle air conditioner according to the present invention.
FIG.

FIG. 6 is an explanatory view showing an embodiment of a vehicle air conditioner according to the present invention.

FIG. 7 is an explanatory view showing a conventional vehicle air conditioner.

FIG. 8 is an explanatory diagram showing another conventional vehicle air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioner for vehicles 2 Unit case 3 Blower 4 Heat exchanger for cooling 5 Heat exchanger for heating 15 Outside air introduction passage 16 Heat exchanger 17 Inside air introduction passage 17A Bent passage 18 Inside air introduction port

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidenobu Arakawa 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Nick Kansei Corporation (72) Inventor Jun Hatakeyama 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Inside of Nick Kansei Corporation (72) Inventor Satoshi Ogiwara 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Inside of Nick Kansei Corporation (72) Inventor Masaharu Terauchi 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Nick Kansei F term (reference) 3L011 BE00

Claims (5)

[Claims] 1. A blower (3), an outside air introduction passage (15) for introducing outside air to the blower (3), and a cooling heat exchanger (4) arranged downstream of the blower (3). A heating heat exchanger (5) arranged downstream of the cooling heat exchanger (4), the cooling heat exchanger (4) and the heating heat exchanger (5). An air conditioner for a vehicle (1) having an air blowing passage (8, 9, 10) for appropriately sending air to the indoor side, wherein the outside air introducing passage (15) is connected via a heat exchanger (16). The heat exchanger (1) in the inside air introduction passage (17) intersects the inside air introduction passage (17) which is made heat-exchangeable.
The vehicle air conditioner (1), characterized in that the downstream side of (6) can join the outside air introduction passage (15). 2. A downstream side of the heat exchanger (16) in the inside air introduction passage (17) is connected to the outside air introduction passage (1).
The air conditioner (1) for a vehicle according to claim 1, wherein the merging is performed on the upstream side of the heat exchanger (16) in (5). 3. The outside air introduction passage (1) in the inside air introduction passage (17) downstream of the heat exchanger (16).
The air conditioner (1) according to claim 1, wherein the merging is performed on the downstream side of the heat exchanger (16) in (5). 4. The air conditioner for a vehicle according to claim 1, wherein an air flow of the inside air introduction passage is controlled by an opening / closing door. ). 5. The inside air introduction passage (17) can be communicated with the inside air discharge passage (23) by a circulation discharge switching door (22) arranged downstream of the heat exchanger (16). The vehicle air conditioner (1) according to any one of claims 1 to 4, wherein: