JPH11348533A - Air conditioner for motor vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the cloud of the entire part of a front glass by making the rise of temperature of air supplied from a differential outlet opening and temperature distribution uniform. SOLUTION: Hot air bypass ducts 24 are respectively provided on both the side surfaces of a unit case 7. A communicating duct 27 is extended between outlet ports 26b to which the openings of the bypass ducts 24 are connected. An outlet port 28 for supplying air in the communicating duct 27 is provided along the communicating duct 27. Thus, air in the downstream side of a heater core 10 advances to the communicating duct 27 from the two air bypass ducts 24 and is further supplied to a differential outlet opening 12 from the outlet port 28 of the communicating duct 27. Thus, the temperature of air supplied form the differential outlet opening 12 rises and the temperature distribution becomes uniform.

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 capable of increasing the temperature of air blown from a differential blowing opening and making the temperature distribution uniform.

[0002]

2. Description of the Related Art Conventional air conditioners for automobiles include:
The one shown in FIG. 5 is known (Japanese Utility Model Laid-Open No. 60-7041).
No. 1).

FIG. 5 is a conceptual diagram showing a conventional automobile air conditioner, and FIG. 6 is a view showing the appearance of a conventional automobile air conditioner.

[0004] This air conditioner for a vehicle includes a heater unit HU, a cooler unit CU, and a blower unit BU.

The unit case 46 of the heater unit HU
The air mix door 404 and the heater core 405 are inside 0.
Is housed.

The unit case 45 of the cooler unit CU
The evaporator 403 is accommodated in 0.

The unit case 47 of the blower unit BU
A blower (not shown) is accommodated in 0.

The unit case 45 of the cooler unit CU
0 is an air inlet 4 for introducing air from the blower unit BU (see FIG. 5) into the unit case 450.
20 are provided.

Unit case 46 of heater unit HU
0, the differential blowing opening 406 and the vent blowing opening 40
7 and a foot outlet opening 408 are provided respectively. Each blowing duct (not shown) is connected to each blowing opening 406, 407, 408, respectively.

The unit case 46 of the heater unit HU
In the area 0, the cold air passage 409 through which the air passed through the evaporator 403 flows, the hot air passage 410 through which the air passed through the heater core 405 flows, the air downstream of the cold air passage 409, and the air downstream of the hot air passage 410. An air mixing chamber 411 for mixing is formed.

As shown in FIG. 6, a part of the air upstream of the hot air passage 410 is provided on one side surface 460b of the unit case 460 of the heater unit HU.
A hot-air bypass path 412 is provided for guiding downstream of the hot air bypass 9. As shown in FIG.
The second inlet 412 a is provided downstream of the heater core 405, and the outlet 412 b of the hot air bypass passage 412 is provided near the differential blowing opening 406.

The air downstream of the cold air passage 409 and the hot air passage 4
10 is mixed with the air downstream from the air mixing chamber 411, but as shown in FIG.
6 is near the downstream of the cool air passage 409 and
Since it is far from 0, the temperature of the air blown out from the differential blowing opening 406 is low, and it is difficult to remove the fogging of the windshield (not shown). In this conventional example, in order to increase the temperature of the air blown out from the differential blowing opening 406, the hot air bypass passage 412 is provided on one side surface 460b of the unit case 460 as described above.

When the air mix door 404 is at the position indicated by the two-dot chain line in FIG. 5, the air that has passed through the evaporator 403 cannot pass through the heater core 405, but flows from the cool air passage 409 through the air mix chamber 411 to each of the blowout openings 40.
Go to 6,407,408. Air is evaporator 403
Is cooled when passing through.

When the air mix door 404 is at the position indicated by the solid line in FIG. 5, the cool air passage 409 is shut off, so that all the air that has passed through the evaporator 403 is sent to the heater core 405. The air that has passed through the heater core 405 travels from the hot air passage 409 to the outlets 406, 407, and 408 through the air mix chamber 411. The air is warmed as it passes through heater core 405.

On the other hand, when the air mix door 404 is at the position indicated by the dashed line in FIG. 5, a part of the air that has passed through the evaporator 403 goes to the cool air passage 409, and the rest goes to the heater core 405. The air downstream of the cool air passage 409 and the air downstream of the hot air passage 410 are mixed in the air mixing chamber 411, and each of the blowing openings 406, 407,
Proceed to 408. For example, when the differential foot mode is selected, air is blown out from the differential air blowing opening 406 and the foot air blowing opening 408, but a part of the air upstream of the hot air passage 410 is blown out through the hot air bypass passage 412. The opening 40 for the differential blowing
The temperature of the air blown out from 6 becomes high, and the lack of temperature is compensated.

[0016]

However, in the case of the vehicle air conditioner of FIG. 5, the hot air bypass passage 412 is provided only on one side of the unit case 460 of the heater unit HU (FIG. 6). For example, in the differential foot mode, there is a problem that the temperature distribution of the air blown out from the differential blowing opening 406 becomes uneven. That is, relatively high-temperature air is blown from a part of the differential blowing opening 406 (a part near the outlet 412b of the hot-air bypass passage 412), while low-temperature air is blown from the other part. It was not possible to remove the fogging of the entire windshield.

Therefore, the inventor of the present application has shown that both side surfaces 46 of the unit case 460 of the heater unit HU as shown in FIG.
Hot air bypass passages 712a, 712b
A vehicle air conditioner with

However, in the case of this vehicle air conditioner, the temperature of the air blown out from the intermediate portion of the differential blowing opening 406 does not become higher than the air blown from both ends of the differential blowing opening 406. As in the case of the automotive air conditioner of No. 5, it was found that the fogging of the entire windshield could not be removed.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to improve the temperature of air blown out from a differential blowing opening and to make the temperature distribution uniform, thereby removing the fogging of the entire windshield. It is an object of the present invention to provide an air conditioner for a vehicle that can perform the operation.

[0020]

According to a first aspect of the present invention, there is provided an automotive air conditioner comprising: a cooling heat exchanger for cooling air from a blower; and a cooling heat exchanger. A heating heat exchanger for heating the air passing therethrough, a unit case accommodating the cooling heat exchanger and the heating heat exchanger, and formed in the unit case to perform the cooling heat exchange. A cool air passage through which the passed air flows, a hot air passage formed in the unit case and through which the air having passed through the heating heat exchanger flows, and a hot air passage formed in the unit case and passing through the heating heat exchanger An air mix door that adjusts the ratio of air to be passed and air that does not pass, and a differential blowing opening, a foot blowing opening, and a vent blowing opening formed in the unit case,
In the vehicle air conditioner, wherein the differential blowing opening is located near the downstream of the cold air passage, and the differential blowing opening and the vent blowing opening are located near the downstream of the hot air passage. Two hot air bypass passages provided on both side surfaces of the unit case for guiding air downstream of the heating heat exchanger to the vicinity of the differential blowing opening, and the hot air bypass passage being located near the differential blowing opening. A communication duct spanned between the outlets of both hot air bypass passages, wherein an air outlet for sending out air in the communication duct is provided along the communication duct in the communication duct. I do.

As described above, the hot-air bypass passages are provided on both side surfaces of the unit case, and a communication duct is bridged between the outlets of the hot-air bypass passages, and the air outlet for sending out the air in the communication duct is connected to the communication duct. The air downstream of the heating heat exchanger proceeds into the communication duct from the two hot air bypass passages, and hot air is blown from the outlet of the communication duct to the entire differential blowing opening to provide the differential blowing. The temperature of the air blown out from the opening increases, and the temperature distribution becomes uniform.

According to a second aspect of the present invention, there is provided an air conditioner for an automobile,
2. The air conditioner for a vehicle according to claim 1, wherein an opening area at both ends of the outlet is larger than an opening area at an intermediate part of the outlet.

As described above, since the opening area of both ends of the outlet is larger than the opening area of the middle part of the outlet, when the duct is connected to the differential outlet, a sufficient amount of the both ends of the windshield is provided. Hot air can be supplied.

An air conditioner for a vehicle according to claim 3 is:
The vehicle air conditioner according to claim 1 or 2,
The hot air bypass passage is constituted by a structure for a hot air bypass passage externally attached to both side surfaces of the unit case.

As described above, the hot-air bypass passage is constituted by the structure for the hot-air bypass passage externally attached to both sides of the unit case, so that the hot-air bypass passage is provided inside the unit case. The ventilation resistance inside the unit case can be reduced.

[0026]

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

FIG. 1 is a top view showing an air conditioner unit of an air conditioner for a vehicle according to an embodiment of the present invention.
1 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a front view of an air conditioner for a vehicle equipped with the air conditioner unit of FIG.

As shown in FIG. 3, the air conditioner for a vehicle includes a blower unit 2 and an air conditioner unit 3 connected to the blower unit 2.

A blower (not shown) is accommodated in the unit case 6 of the blower unit 2. The blower introduces air into the unit case 6 from the inside air inlet 11 or the outside air inlet (not shown).

As shown in FIG. 2, an evaporator (cooling heat exchanger) 8 and an air mixing door 9 are arranged in the unit case 7 of the air conditioner unit 3 in order from the upstream side to the downstream side.
And a heater core (heating heat exchanger) 10.

The evaporator 8 is a heat exchanger for cooling air from the blower. Air mix door 9
This is a door for adjusting the ratio of air that passes through the heater core 10 and air that does not pass through. Heater core 10
Is a heat exchanger for heating the air from the evaporator 8.

The case upper part 7a of the unit case 7 of the air conditioner unit 3 is provided with a differential blowing opening 12 and a vent blowing opening 13. A foot outlet duct connection port 15 is provided in the lower part of the unit case 7. A foot outlet opening 14 is provided near the vent outlet opening 13 in the unit case 7. A guide path 30 is formed between the foot outlet opening 14 and the foot outlet duct connection port 15.

The outlets 12, 13, and 14 are opened and closed by a differential door 16, a vent door 17, and a foot door 18, respectively. A differential blowing duct (not shown) for guiding air to a windshield (not shown) is connected to the differential blowing opening 12, and a vent blowing duct (not shown) for guiding air to the face of the occupant is connected to the vent blowing opening 13. The mouth 15 is connected to a foot blowing duct (not shown) for guiding air to the occupant's foot.

The air passing through the upper portion of the evaporator 8 proceeds straight to the air mixing door 9 side, and the air passing through the lower portion of the evaporator 8 is guided by the fixed guide 19 and advances toward the air mixing door 9. The passage of the air that has passed through the evaporator 8 is the cool air passage 20, and the differential blow opening 12 is located near the downstream of the cool air passage 20.

The air that has passed through the heater core 10 is guided by the fixed guide 23 and proceeds to the air mixing chamber 21.
The passage of the air that has passed through the heater core 10 is a warm air passage 22, and a vent outlet opening 13 and a foot outlet opening 14 are located near the downstream of the warm air passage 22.

In the case side surfaces 7b and 7c of the unit case 7 of the air conditioner unit 3, two hot air bypass ducts (hot air bypass ducts) serving as hot air bypass passages for guiding air downstream of the heater core 10 to the vicinity of the differential blowing opening 12 are provided. Wind bypass passage structures) 24 and 25 are externally provided. One opening of each of the hot air bypass ducts 24 and 25 is provided at an inlet 26 a formed on both sides 7 b and 7 c of the unit case 7 and downstream of the heater core 10.
The other opening 25 has both side surfaces 7b and 7 of the unit case 7.
c, which are respectively connected to outlets 26b formed near the differential blowing opening 12.

A tubular communication duct 27 is bridged between the two outlets 26b. The communication duct 27 is formed with an outlet 28 for sending out the air in the communication duct 27 to the differential blowing opening 12 along the communication duct 27. However, the direction of the outlet 28 may be any direction as long as the air in the communication duct 27 is guided to the differential blowing opening 12.
It is not always necessary to face the differential blowing opening 12.

When a mode changeover switch (not shown) is switched to, for example, a differential foot mode, the air mix door 9 moves to a predetermined position between a position indicated by a solid line and a position indicated by a two-dot chain line. At this time, vent opening 13
The vent door 17 for opening and closing the door is closed, and the foot opening 1 is opened.
The differential door 16 opens and closes the foot door 18 that opens and closes the differential opening 4 and the differential door 16 that opens and closes the differential blowing opening 12.

The air is introduced into the unit case 6 from the inside air inlet 11 or the outside air inlet by the operation of the blower, and the introduced air is supplied from the unit case 7 through the suction port (not shown).
Air is introduced into the interior.

The air introduced into the unit case 7 is cooled when passing through the evaporator 8. Part of the air that has passed through the evaporator 8 advances to the cool air passage 20, and the rest advances to the heater core 10, and is heated when passing through the heater core 10.

The cold air passing through the cold air passage 20 and the hot air passage 2
The hot air that has passed through 2 is mixed in the air mix chamber 21, but the differential air outlet 12 is near the downstream of the cold air passage 20 and the foot air outlet 14 is near the downstream of the hot air passage 22, so that the differential air is blown out. The temperature of the air arriving at the opening 12 is lower than the temperature of the air arriving at the foot opening 14. However, the warm air upstream of the hot air passage 22 is guided to the vicinity of the differential blowing opening 12 through two hot air bypass ducts 24 and 25 externally attached to both side surfaces 7 b and 7 c of the unit case 7, and further this hot air The two outlets 26b (the warm air bypass duct 2)
4 and 25), and the air is sent out from the air outlet 28 formed along the communication duct 27 toward the entirety of the differential air blowing opening 12. The temperature of the air blown from the opening 12 is high, and the temperature distribution of the blown air is uniform.

As described above, the case of the differential foot mode has been described as an example. In the case of the foot mode, the automotive air conditioner operates in substantially the same manner as in the differential foot mode. The main difference is that the opening of the differential door 16 is small.

According to this embodiment, the differential blowing opening 1
Since the temperature of the air blown out from 2 is raised and the temperature distribution of the blown air is made uniform, it is possible to remove the fogging of the entire windshield when the differential blowing duct is connected to the differential blowing opening 12. it can.

In this embodiment, cylindrical hot air bypass ducts 24 and 25 are used as the hot air bypass passage structures.
Instead of this, a box-shaped (not shown) having an injection-molded opening is used as an inlet 26a and an outlet 26.
b and may be externally attached to both side surfaces 7b and 7c of the unit case 7 so as to communicate with each other.

FIG. 4 is a view showing the shape of the outlet of the communication duct.

As a modification of the above-described embodiment, as shown in FIG. 4, the outlet of the communication duct 28 is formed by changing the opening area of both ends 128b and 128c of the outlet 128 to the opening area of the intermediate portion 128a of the outlet 128. The shape may be such that it is larger than that of. By employing the outlet 128 having such a shape, both ends 128b, 12
The amount of air blown from 8c increases. Since the outlets of the differential blow duct connected to the differential blow opening 12 are arranged along the vehicle width direction (lateral direction of the windshield),
The outlets of the differential air outlet ducts located on both sides in the vehicle width direction are farther from the differential air outlets 12, but a sufficient amount of air reaches both the outlets from the differential air outlets 12, so that the entire windshield Can be more reliably removed.

A number of small holes may be provided along the communication duct as the outlet.

[0048]

As described above, according to the vehicle air conditioner of the first aspect of the present invention, the temperature of the air blown out from the differential blowing opening is increased, and the temperature distribution of the blown air is made uniform. Thus, by connecting the differential blowing duct to the differential blowing opening, it is possible to remove the fogging of the entire windshield.

According to the air conditioner unit for an air conditioner for a vehicle according to the second aspect of the present invention, since the amount of air blown from both ends of the air outlet is large, when a duct is connected to the differential air blowing opening, both ends of the windshield are opened. A sufficient amount of warm air can be supplied to the portion, and the fogging of the entire windshield can be more reliably removed.

According to the air conditioner unit of the vehicle air conditioner of the third aspect of the present invention, since the hot air bypass passage is constituted by the structure for the hot air bypass passage externally attached to both side surfaces of the unit case. The ventilation resistance inside the unit case can be reduced as compared with the case where a hot air bypass passage is provided inside the unit case.

[Brief description of the drawings]

FIG. 1 is a top view showing an air conditioner unit of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a front view of an air conditioner for a vehicle equipped with the air conditioner unit of FIG. 1;

FIG. 4 is a view showing a shape of an outlet of a communication duct.

FIG. 5 is a conceptual diagram showing a conventional air conditioner for a vehicle.

FIG. 6 is a diagram showing an appearance of a conventional automotive air conditioner.

FIG. 7 is a diagram showing the appearance of an automotive air conditioner devised by the present inventor.

[Explanation of symbols]

 Reference Signs List 2 blower unit 3 air conditioner unit 7 unit case 8 evaporator 9 air mix door 10 heater core 12 differential blowout opening 13 vent blowout opening 14 foot blowout opening 16 differential door 17 vent door 18 foot door 20 cold air passage 22 hot air passage 24, 25 hot air Bypass duct 27 Communication duct 28,128 Air outlet of communication duct

Claims (3)

[Claims] 1. A cooling heat exchanger for cooling air from a blower, a heating heat exchanger for heating air passing through the cooling heat exchanger, and a cooling heat exchanger. A unit case accommodating the heating heat exchanger; a cold air passage formed in the unit case, through which the air passing through the cooling heat exchanger flows; and a cooling air passage formed in the unit case, the heating heat exchange A hot air passage through which air that has passed through the heat exchanger, an air mixing door provided in the unit case and adjusting a ratio of air passing through the heating heat exchanger and air not passing through, and formed in the unit case. A differential blowing opening, a foot blowing opening, and a vent blowing opening, wherein the differential blowing opening is located near the downstream of the cold air passage, and the differential blowing opening and the vent are provided. In the air conditioner for automobiles, wherein the outlet is located near the downstream side of the hot air passage, the outlet is provided on both side surfaces of the unit case, and the air downstream of the heating heat exchanger is supplied to the differential outlet. Two hot-air bypass passages for guiding near to the air outlet, and a communication duct bridged between the outlets of the hot-air bypass passages located near the differential blowing opening, wherein the communication duct includes: An air conditioner for a vehicle, wherein an outlet for sending out the air in the communication duct is provided along the communication duct. 2. The air conditioner for a vehicle according to claim 1, wherein an opening area at both ends of the outlet is larger than an opening area at an intermediate part of the outlet. 3. A vehicle air conditioner according to claim 1, wherein said hot air bypass passage is constituted by a structure for a hot air bypass passage externally attached to both side surfaces of said unit case. apparatus.