JPH06270656A - Air-conditioning device for car - Google Patents

Abstract

PURPOSE:To provide a car air-conditioner which can achieve the head-cold and feet-hot condition simply through utilization of the temp. difference between a warm wind having passed a heater core and a cold wind detoured the same and which can stabilize the temp. of the air exhausted from a heater case. CONSTITUTION:A concave surface to deflect a warm wind H having passed a heater core 2 to below a car (arrow D) and a concave surface 141 to deflect a cold wind C having detoured the front surface of the heater core 2 to over the car (arrow U) are furnished in front of the wind exhaust hole 11 of a heater case 1, and the cold wind C in the air mix region is displaced to uppermore of the car than the flow of the warm wind H. From the upper part of the wind exhaust hole 11, the air having a low temp. is exhausted and led to a blowout port provided in the upper part of the cabin. From the lower part of the exhaust hole 11, air having a high temp. is exhausted and led to a blowout hole provided in the cabin on its feet side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner having a function of mixing cold air and hot air.

[0002]

2. Description of the Related Art As this type of vehicle air conditioner, for example, one disclosed in Japanese Utility Model Laid-Open No. 1-91614 is known. As shown in FIG. 6, the air conditioner described in the above publication is
The air introduced from the air guide 100a is passed through the heater core 101 inside the hollow heater case 100 having the air guide 100a and the air exhaust 100b, and then the air exhaust 1
The hot air flow path Rh that guides to the air mix area AM provided in the vicinity of 00b and the air introduced from the air guide port 100a are bypassed from the heater core 101 and the air mix area A
A cool air flow path Rc for guiding to M is provided, and an air mix door 102 for adjusting an air distribution amount to both the hot air flow path Rh and the cool air flow path Rc is provided in front of the heater core 101. Therefore, the warm air from the warm air flow path Rh and the cool air from the cold air flow path Rc are merged in the air mix area AM, and the air having a temperature according to the air distribution amount by the air mix door 102 is discharged from the air exhaust port 100b.
The air exhausted from the air exhaust port 100b is distributed to the air outlets at various places in the vehicle compartment by the distributor downstream of the heater case 100 and is exhausted into the vehicle compartment.

[0003]

In the air conditioner described in the above publication, since the air mix area AM is provided just before the exhaust port 100b of the heater case 100, the warm air having passed through the heater core 101 and the heater core 101. Exhaust port 100b without sufficiently mixing with the cold air that has bypassed
And the temperature distribution near the exhaust port 100b may vary greatly. Therefore, in order to stabilize the temperature of air blown into the passenger compartment, it is necessary to further mix air in the distributor downstream of the heater case 100. Therefore, when designing the distributor, it is necessary to give priority to the mixing efficiency of air, and the degree of freedom in shape and size is lost, and it is difficult to design a distributor that can be shared by many vehicle types. on the other hand,
A vehicle air conditioner is required to realize a so-called head cold foot heat state in which cold air is supplied to the passenger's head and hot air is supplied to the feet.
To meet this requirement, for example, the heater case 100
It is necessary to provide a third flow path that bypasses the cool air upstream of the above from the heater case 100 and directly guides it to the air outlet in the upper part of the vehicle compartment. For this reason, the structure of a series of air conditioning ducts that make up the air conditioner becomes complicated, and the design work cannot be endured.

The object of the present invention is to easily realize a head cold foot heat state by utilizing the temperature difference between the warm air passing through the heater core in the heater case and the cold air bypassing the heater core, and to be discharged from the heater case. An object of the present invention is to provide an air conditioning system for a vehicle that can stabilize the temperature of the air that is generated.

[0005]

1 and 2, which show an embodiment, the present invention will be described with reference to FIG.
The air introduced from the air guide port 10 is introduced into the heater core 2 inside the hollow heater case 1 having the air exhaust port 11.
The hot air flow path Rh, which is introduced into the air mixing area AM in the vicinity of the exhaust port 11 and is guided to the air mixing area AM by bypassing the air introduced into the heater case 1 from the heater core 2. It is applied to a vehicle air conditioner provided with a wind flow path Rc. Then, the above-described object is that in the heater case 1, the flow direction of the cold air C guided from the cold air flow path Rc to the air mix region AM is set to be smaller than that of the hot air flow H guided from the warm air flow path Rh to the air mix region AM. Is also achieved by providing the rectifying units 131 and 141 that deflect the heater case 1 upward (in the direction of arrow U) when mounted on a vehicle.

[0006]

The flow direction of the cool air C flowing into the air mix area AM from the cool air flow path Rc by the rectifying parts 131 and 141 is higher than the flow direction of the warm air H flowing into the air mix area AM from the warm air flow path Rh. Because it is biased
Air having a low temperature is discharged from the upper part of the exhaust port 11, and air having a high temperature is discharged from the lower part of the exhaust port 11.

Incidentally, in the section of means and action for solving the above problems for explaining the constitution of the present invention, the drawings of the embodiments are used for making the present invention easy to understand. It is not limited to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3, reference numeral 1 is a heater case, and 2 is a heater core. The heater case 1 is in the shape of a rectangular parallelepiped, and has an air guide port 10 for taking in air from a cooling unit (not shown), and an air exhaust port 11 that opens in a direction orthogonal to the air guide port 10 and discharges air to a distributor (not shown). Is equipped with. When the heater case 1 is mounted on a vehicle, the direction of the arrow U in FIG. 1 is the upper side of the vehicle and the direction of the arrow D is the lower side of the vehicle.
Is directed in the vehicle width direction, and the exhaust port 11 is directed to the rear of the vehicle.
In the following, the direction of arrow U in the drawing is above the heater case 1,
The direction of arrow D is referred to as the lower side of the heater case 1.

The heater core 2 is arranged in the heater case 1 so as to be inclined toward the air outlet 11 toward the downstream side in the direction of air flow from the air inlet 10, and the front end 20 thereof.
Is abutted against the wall surface 12 on the opposite side of the exhaust port 11 and connected to a heater pipe (not shown). On the other hand, the rear end 21 of the heater core 2 is located substantially in the middle between the exhaust port 11 and the wall surface 12 of the heater case 1, so that the air from the air guide port 10 is introduced into the heater core 2 inside the heater case 1. The hot air flow path Rh that is passed and then guided to the exhaust port 10
And, a cold air flow path Rc is formed in which the air from the air guide port 10 bypasses the front of the heater core 2 and is guided to the air exhaust port 11.
The heater core 2 is arranged as described above because the length of the heater core 2 is increased to secure a sufficient amount of heat while preventing an increase in the depth dimension (vertical direction in FIG. 1) of the heater case 1. The length of the heater pipe connected to the core 2 is shortened as much as possible to suppress the decrease in thermal efficiency,
Furthermore, this is to make the flow path of the cool air C that bypasses the front surface 22 side of the heater core 2 and heads to the exhaust port 11 as short and linear as possible to minimize the ventilation resistance.

The hot air flow passage Rh and the cold air flow passage Rc join together in the air mix area AM in front of the exhaust port 10. As shown in FIGS. 1, 4 and 5, a portion of the upper wall surface 13 of the heater case 1 that continues from the air mix area AM to the exhaust port 11 has a flat surface 13 on the side of the cold air flow passage Rc.
On the other hand, the concave curved surface 13 that curves downward toward the heater case 1 as the warm air flow path Rh side approaches the exhaust port 11
It is supposed to be 1. On the other hand, in the lower wall surface 14 of the heater case 1, from the air mix area AM to the air outlet 11
In the portion continuing to, the side of the warm air flow path Rc is a uniform plane 140, while the side of the cold air flow path Rh is a concave curved surface 141 that curves upward as the exhaust air outlet 11 approaches.

As shown in FIGS. 1 to 3, the heater core 2
Before this, an air mix door 3 is provided, which is driven to rotate about an axis 30 provided near the rear end 21 of the heater core 2 by an actuator (not shown). The air mix door 3 is rotatable between a position that closes the hot air flow path Rh (a solid line position in FIG. 2) and a position that closes the cold air flow path Rc (a two-dot chain line position in FIG. 2). The amount of air distributed to the warm air flow passage Rh and the cold air flow passage Rc is adjusted according to the position of the air mix door 3.

A gap approximately equal to the thickness of the heater core 2 is provided between the shaft 30 of the air mix door 3 and the front face 22 of the heater core 2, and the front face 22 of the heater core 2 is provided downstream of this gap. An adjustment flow path Rm that is partitioned from the cold air flow path Rc by the parallel partition walls 4 and communicates with the warm air flow path Rh is formed. A sub air mix door 5 that is sufficiently smaller than the air mix door 3 is provided at the rear end of the adjustment flow path Rm. The sub air mix door 5 is in contact with the rear end 21 of the heater core 2 about the shaft 50 by an actuator (not shown) to close the adjustment flow path Rm (solid line position in FIG. 2) and the partition wall 4. It is rotationally driven between a position which is located on a substantially extended position and which completely opens the adjustment flow path Rm (a position indicated by a two-dot chain line in FIG. 2).

The positions of the air mix door 3 and the sub air mix door 5 are controlled by a controller (not shown) based on the indicated position of a temperature adjusting lever (not shown) provided in the passenger compartment. The positional relationship between the doors 3 and 5 will be described below with reference to FIGS. 2 and 3. When the temperature adjusting lever is at the full-hot position on the highest temperature side, as shown in FIG. 3 (A), the air mix door 3 rotates to a position that completely covers the cooling flow path Rc, and the sub air mix door 5 moves. The adjustment flow path Rm is rotated to a position where it is closed. As a result, the entire amount of air taken in from the air guide port 10 flows into the warm air flow path Rh, and the hot air H that has passed through the heater core 2 is exhausted from the air exhaust port 11 as it is.

When the temperature adjusting lever is operated from the full hot position to the low temperature side, the sub air mix door 5 starts to move and the adjusting flow path Rm moves to the temperature adjusting lever as shown in FIG. 3B. The cold air Cm that has been opened by an amount corresponding to the operation amount and has passed through the adjustment flow path Rm flows into the hot air flow path Rh, and the temperature of the hot air H decreases. When the temperature adjusting lever is further operated to the low temperature side from the state where the adjustment flow path Rm is opened to the maximum, the air mix door 3 moves toward the heater core 2 side as shown in FIG. 3 (C). Start, the cold air C flows into the cold air flow path Rc, and the air mix area AM
Then join the warm air H.

When the temperature control lever is at the full cool position on the lowest temperature side, as shown in FIG. 2, the air mix door 3 is rotated to a position that completely covers the hot air flow passage Rh, and the sub air mix door 5 is opened. The adjustment flow path Rm is rotated to a position where it is closed. As a result, the entire amount of air taken in from the air guide port 10 flows into the cold air flow path Rc, and only the cold air C floating in the heater core 2 is exhausted from the air exhaust port 11.

In this embodiment, the exhaust port 1 of the heater case 1
Due to the concave curved surface 131 provided in front of 1, the warm air flow path Rh
The flow direction of the warm air H flowing from the air mixing area AM into the air mixing area AM is deflected downward of the vehicle (FIGS. 1 and 5), and the concave curved surface 141 is formed.
As a result, the flow direction of the cold air C flowing into the air mix area AM from the cold air flow path Rc is deflected upward in the vehicle (FIG. 1,
(Fig. 4). Therefore, the temperature of the air discharged from the air outlet 11 is low at the upper portion of the air outlet 11 and high at the lower portion. Therefore, in the distributor connected to the exhaust port 11,
By simply guiding the air discharged from the upper part of the exhaust vent 11 to the air outlet on the upper part of the vehicle compartment and the air discharged from the lower part of the air exhaust port 11 to the air outlet on the foot side of the vehicle compartment A state is formed.

The mixing of the hot air H and the cold air C in the air mixing area AM is reduced by the amount of the two being deflected in the opposite directions, so the temperature of the air discharged from the upper part of the air outlet 11 and the air outlet 11 are reduced. The temperature of the air discharged from the lower part of the is stable while maintaining a constant temperature difference. Therefore, it is not necessary to mix air in the distributor downstream of the heater case in order to stabilize the temperature of air blown out from each air outlet.

In addition, in this embodiment, the warm air H is discharged from the exhaust port 11 while being deflected downward of the vehicle, and the cold air C is discharged from the exhaust port 11 while being deflected upward of the vehicle. Even if the shape is not devised, in the full hot state (Fig. 3 (A)), more warm air is supplied to the foot side than to the head, and in the full cool state (Fig. 3 (B)), the foot side. A lot of cool air is supplied to the head, and a comfortable environment is formed naturally.

In this embodiment, the adjustment flow path Rm is provided on the inner side of the heater case 1 with respect to the cold air flow path Rc, because the temperature of the hot air H is adjusted at a position sufficiently away from the discharge port 11. This is for stabilizing the temperature of the warm air H. However, if it is not necessary to lower the temperature of the air supplied to the feet so much, the sub air mix door 5 may be omitted. Further, especially when the width of the adjusting flow path Rm is set small and the temperature adjusting lever is operated to the low temperature side from the full hot state, the sub air mix door 5 is moved to the air mix door 3
The reason why the temperature is released prior to the above is that the temperature lowering characteristic from the full hot state can be adjusted in proportion to the operation amount of the temperature adjusting lever to enable minute temperature adjustment. Air mix door 3
When the air is immediately opened, a considerable amount of cold air C is introduced into the cold air flow passage Rc not only from the tip side of the air mix door 3 but also from the side.
And the exhaust gas temperature of the exhaust port 11 greatly decreases.

In the above embodiments, the concave curved surfaces 131 and 141 of the heater case 1 constitute a rectifying section. However, the present invention is not limited to such a concave curved surface, and any shape may be used as long as it can deflect the flow direction of the cool air in the air mix region above the warm air. For example, even if only one of the concave curved surfaces 131 and 141 is provided, a considerable effect can be expected. Also, in the embodiment, the concave curved surfaces 131, 1
Although the radius of curvature of 41 is constant in the width direction of the exhaust port 11 and the deflection amounts of the warm air H and the cold air C are made equal, the present invention is not limited to such an aspect. For example, the radius of curvature of the concave curved surfaces 131 and 141 is increased toward the center of the exhaust port 11 to increase the degree of deflection in the flow direction of the warm air H and the cold air C on both end sides of the exhaust port 11, By reducing the degree of deflection in the flow direction of the hot air H and the cold air C at the center, it is possible to increase the mixing amount of the hot air H and the cold air C while realizing the vertical temperature difference.

[0021]

As described above, according to the present invention,
Air with a lower temperature is discharged from the upper part of the air outlet of the heater case, and air with a higher temperature is discharged from the lower part of the outlet, so the air discharged from the upper part of the outlet is guided to the air outlet on the upper part of the passenger compartment. By simply guiding the air exhausted from the lower part of the exhaust port to the air outlet on the foot side of the vehicle compartment, the head cold foot heat state can be easily realized. Moreover, since the temperature of the air discharged from above and below the outlet is stable with the desired temperature difference maintained,
There is no need to mix air in the distributor downstream of the heater case. Therefore, the degree of freedom in designing the distributor is increased, and the series of duct shapes is simplified to reduce the number of man-hours required to design the air conditioner.

[Brief description of drawings]

FIG. 1 is a perspective view showing a heater case according to an embodiment of the present invention in a partial cross-sectional view.

FIG. 2 is a horizontal sectional view of the heater case of FIG.

FIG. 3 is a diagram showing a flow state of air in the heater case of FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a cross-sectional view taken along line VV of FIG.

FIG. 6 is a sectional view of a conventional heater case.

[Explanation of symbols]

 1 Heater Case 2 Heater Core 3 Air Mix Door 5 Sub Air Mix Door 10 Air Vent 11 Exhaust Vent 131 Concave Curved Surface to Deflect Hot Air 141 Concave Curved Surface to Deflect Cold Air AM Air Mix Area C Cold Air H Warm Air Rc Cold Air Flow Rh Hot air flow path

Claims (1)

[Claims] 1. Inside a hollow heater case having a wind guide port and an exhaust port, the air introduced from the wind guide port is passed through a heater core and then guided to an air mixing region provided near the exhaust port. In a vehicle air conditioner comprising a hot air flow passage and a cold air flow passage that guides the air introduced from the air guide port from the heater core to the air mix region, the heater case has the cold air flow. A rectification unit is provided that deflects the flow direction of the cool air guided from the passage to the air mix region to the upper side when the heater case is mounted on the vehicle, compared to the flow direction of the warm air guided from the warm air flow passage to the air mix region. A vehicle air conditioner characterized by the above.