JPS6212650Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heater unit for an automobile that has sufficient anti-fog and defrost effects on side window glasses.

Generally, an air conditioner for an automobile is composed of an intake unit 1 containing a suction fan 4, a cooler unit 2 containing an evaporator 5, and a heater unit 3 containing a heater core 6, as shown in FIG. (Refer to Japanese Utility Model Application No. 56-1810) After the outside air or inside air or a mixture thereof that is selectively introduced into the intake unit 1 by switching the intake door 11 is cooled by the cooler unit 2, the heater unit 3
The system reheats the air inside the vehicle as necessary and blows the air at an appropriate temperature into the vehicle interior. In other words, in the heater unit 3, the warm air obtained by passing some or all of the introduced air through the heater core 6 and heating it is mixed with the air that bypassed the heater core 6, or is selected as appropriate without mixing. The air is blown into the passenger compartment from the air outlet.
Incidentally, the heater core 6 may be closed with a mixer door 7 to blow out all the outside air or cold air directly into the vehicle interior.

As mentioned above, the heater unit 3 used as a part of an automobile air conditioner or in combination with an intake unit as an automobile heater includes:
In order to remove or prevent fogging on the windshield, there is a differential duct 8 that blows warm air along the inner surface of the windshield in the differential mode, a floor duct 9 that blows warm air toward the feet of the front seats in the heat mode, and a floor duct 9 that blows hot air toward the feet of the front seats in the vent mode. A vent duct 10 is provided for blowing cold air from the instrument panel into the vehicle interior, and each duct 8, 9, and 10 is further provided with a differential for adjusting air volume, and a floor door and a vent door for controlling the floor duct. ing. Further, the vent duct 10 is branched into a center vent outlet that blows out air from the center of the instrument panel, and side bend outlets that blow out air from both sides near the passenger doors on both sides.

In such an air conditioner for an automobile, the vent duct 10 is generally closed during a heat mode in which the floor door is opened to blow hot air to the feet, or in a differential mode in which the differential door is opened to send hot air to the windshield. Therefore, hot air is blown out only from the differential air outlet (hereinafter referred to as type A). This hot air flows along the windshield but not along the side windows, so it does not cause fogging on the side windows. Frost cannot be removed directly. However,
When the temperature is extremely low or the humidity is high, not only the windshield but also the side windows tend to fog up, so it is necessary to prevent this from happening. Particularly in automobiles located in regions where the above-mentioned conditions are severe, improvement of the heater unit is desired, as it is one of the essential performances. For example, as shown in Figures 2 and 3, by adjusting the opening and closing of various doors, the vent door 1 can be adjusted even in the differential mode or heater mode.
2 is half-open, and some of the hot air is sent to the vent duct 10 and blown out from the side vent duct to prevent the side windows from fogging. The type that blows out is hereinafter referred to as type B).

However, in this conventional heater unit where the vent door 12 is left half-open and the vent duct 10 is always open, the center vent outlet must be switched by the passenger's operation in order to prevent hot air from blowing out from the center vent outlet. There are some unavoidable annoyances.
In addition, a separate opening/closing mechanism must be provided at the air outlet, resulting in a complicated structure and increased costs.

The present invention provides a heater unit for an automobile that automatically prevents air from blowing out from the center vent outlet while blowing air from the side bend outlet when switching to heater mode or differential mode. The purpose is to eliminate the troublesome operation of opening and closing the center vent outlet due to switching.

In order to achieve this purpose, the present invention separates the vent duct into a side vent duct that blows air at both ends of the instrument panel and a center vent duct that blows air at the center of the instrument panel, and separately connects the vent duct to the heater unit. By opening the center vent duct and the differential duct adjacent to each other, and providing a single door between them that opens and closes these ducts alternately, when the differential duct is opened and the heater mode or differential mode is set, the center vent duct and the differential duct are opened. By closing the vent to prevent wind from blowing out from the center vent outlet, and by opening the side vent duct in a position where it is always open relative to the door, the side vent duct can be closed even in differential mode or heater mode. Warm air is blown out from the outlet to remove or prevent fogging and frost on the side windows. In addition, by creating a structure in which the differential duct and center vent duct are opened and closed alternately with a single door, the center vent duct is automatically blocked when switching from vent mode to heater mode or differential mode, allowing occupants to open and close the center vent. This eliminates the hassle of operating each exit one by one, and by sharing doors, the number of doors can be reduced by one, leading to cost reductions.

The structure of the present invention will be explained in detail below based on the embodiments shown in the drawings and FIGS. 4 to 6.

FIG. 4 schematically shows the automotive heater unit of the present invention. This automotive heater unit 3, like the conventional one, includes a vent duct 10 that blows air out from the front of the instrument panel, a floor duct 9 that blows air out to the feet of front seat passengers, and a vent duct 9 that blows air out toward the front window. It has a defer duct 8 that blows out, and also has a built-in heater core 6 that uses engine cooling water as a heat source, and heats the air passing through the heater core 6 with hot water and engine cooling water passing through the heater core 6 to obtain warm air. ,
This warm air is blown into the vehicle interior through any of the ducts 8, 9, and 10 after being adjusted to a desired temperature, either as is, or mixed with unheated air bypassing the heater core 6, or without mixing. It is. A mix door 7 is provided immediately in front of the heater core 6. This mix door 7
The heater core 6 distributes the air passing through the heater core 6 and the air bypassing the heater core 6 in order to adjust the temperature of the blown air to a desired temperature, and is operated by a template lever provided on a controller (not shown).

The vent ducts 10 include a center vent duct 10c that blows out air at the center of the instrument panel, and side vent ducts 10 that blow out air at both left and right ends of the instrument panel.
s, and are separately opened to the heater unit 3. This vent duct 10 is generally opened during a cooler mode in which cold air is blown out to cool the inside of the vehicle, and in a bilevel mode in which outside air is blown out so as not to warm the head when heating the feet. However, in the case of the present invention, the side vent duct 10s is always open to each door in the unit, and is provided so that air can be blown out even in the heater mode and the differential mode. This side vent duct 10s
In this embodiment, as shown in FIG.
Center vent duct 10c within the moving range of 5.
Two ducts are opened on each side of the instrument panel, and one duct is connected to the air outlet on the right side of the instrument panel, and the other duct is connected to the air outlet on the left side of the instrument panel. However, when the opening position and opening dimensions of this side vent duct 10s are set at a position where it is affected by the flow of the wind flowing from the intake unit 1 or the cooler unit 2, that is, the inertial force of the wind, the amount of left and right air flow is adjusted. Consideration is required to ensure equality. In other words, in so-called air conditioners that have a cleaning unit,
When the intake unit is fully cooled in vent mode, the air that is blown from the intake unit 1 through the cooler unit 2 or into the heater unit 3 without passing through the cooler unit 2 in the case of a so-called heater that does not have a cooler unit is affected by its own inertia. This is because when the air flows into the side vent duct 10, the distribution density is not uniform but is biased, and the downstream side is denser, that is, the air volume is larger. Therefore, for example, a branch duct may be adopted as the side vent duct 10s, and the opening of the side vent duct 10s may be made into one and opened in the same direction as the wind flow direction in the vent mode. Alternatively, each opening may be opened on one surface perpendicular to the flow direction of the wind flowing during full cooling in the vent mode. On the other hand, the center vent duct 10c is opened adjacent to the differential duct 8, as shown in FIG. The center vent duct 10c generally has a structure in which air is blown out from two outlets, so a branch duct is used. In this case, the wind flowing inside the heater unit 3 during full cooling in the vent mode is influenced by its own inertia force and is biased to the leeward side when flowing into the center vent duct 10c on the side, so the branching point of the duct It is necessary to move the duct to the leeward side and make the duct opening area on the windward side larger than that on the leeward side.

The center vent duct 10c and the differential duct 8
A mode switching door 15 for alternately opening and closing each of the ducts 10c and 8 is provided between the ducts 10c and 8. This door 15 is operated by a mode switching lever (not shown) of a controller, and controls opening/closing of the duct and the amount of air passing through the duct. Generally, the center vent duct 10c and the differential duct 8
Since the two doors are never opened and closed at the same time, it is possible to share the same door. That is, as shown in FIG. 5, when the center vent duct 10c is closed, the differential duct 8 is fully opened and air is blown out, and on the contrary, the differential duct 8
When the center vent duct 1 is closed,
0c is fully opened and the wind is blown out.
The differential duct 8 blows air along the front window, and is generally opened during a differential mode in which hot air is blown out to defrost or defrost the front window. Of course, by fixing the door 15 during opening and closing, it is also possible to blow air out of both the center vent duct 10c and the differential duct 8. For example, during bi-level heating, where only the feet are heated without heating the head, wind can be blown not only from the vent and foot outlet but also from the differential outlet to improve the effect of removing fog and frost.

The floor duct 9 blows air toward the occupant's feet, and is opened in the heater mode, which heats the passenger compartment from the occupant's feet, and in the bilevel mode, which heats only the feet without warming the occupant's head. Ru.
This floor duct 9 is equipped with a floor door 13, which is operated by a mode switching lever of a controller to control the opening/closing of the duct and the amount of air passing through it. Also, so far we have described an example in which the side vent duct is always open, but
If there is no need to worry about fogging of the side windows, a shutter mechanism may be provided near the exit of the side vent duct so that the wind from the side vents can be shunted. The anti-fogging effect of side vent air is used only when necessary, and when it is not needed, the air can be used to heat the feet or prevent the windshield from fogging.

According to the automotive heater unit of the present invention configured as described above, the center vent duct 10c is closed by the door 15 during the differential mode in which warm air is blown toward the front window in order to remove fog or frost from the front window. Although the side vent duct 10s is in an open state (see Figure 6), a portion of the warm air flowing into the differential duct 8 is blown out from the side vent outlet. You can also ensure a clear field of view at the same time. Further, even in the heater mode in which hot air is blown not only from the differential air outlet but also from the floor air outlet, lateral visibility can be secured because the hot air flows into the side vent duct 10s which is always open. Furthermore, in the vent mode in which air is blown out from the outlet of the instrument panel, when the center vent duct 10e is opened, the differential duct 8 is simultaneously opened to the door 15.
Since it is closed by the floor door 13, it can be switched simply by opening and closing the floor door 13.

As described above, according to the automotive heater unit of the present invention, the side vent duct that blows wind toward the side windows is opened into the heater unit separately from the center vent duct that blows wind toward the occupants. Since each door in the heater unit is provided to be open at all times, a portion of the warm air passes through the side vent duct and blows out from the side vent outlet even in heater mode and differential mode, as shown in Figure 6. This allows you to remove fog and frost from the side windows. In addition, since the center vent duct and the differential duct can be opened and closed alternately using a common door, if the differential duct is opened and set to differential mode or heater mode, the center vent duct will inevitably be closed. The troublesome operation of opening and closing becomes unnecessary, and the mode switching operation becomes easy. Furthermore, since the differential duct and the vent duct can be opened and closed alternately using a common door, the number of doors can be reduced by one, and a link mechanism for opening and closing the center vent duct is no longer required, reducing the cost of the heater unit. A decline can be expected.

[Brief explanation of the drawing]

Figure 1 is a diagram of the principle of an automotive air conditioner, Figure 2
3 and 3 are a central vertical cross-sectional view and a central cross-sectional view showing the principle of a conventional B-type automotive heater unit, and FIG. 4 is a central vertical cross-sectional view showing the principle of a B-type automotive heater unit according to the present invention. 5 is a central cross-sectional view of the heater unit, and FIG. 6 is an air distribution pattern diagram of the heater unit. 8...Def duct, 9...Floor duct, 10
...Vent duct, 10c...Center vent duct, 10s...Side vent duct, 15...Door.

Claims (1)

[Scope of utility model registration request] A vehicle that heats some or all of the introduced air with a heater core to produce warm air, and selectively blows out the warm air from a vent duct, floor duct, and differential duct, with or without mixing with air that has bypassed the heater core. In this heater unit, the vent duct is separated into a side vent duct that blows air at both ends of the instrument panel, and a center vent duct that blows air at the center of the instrument panel, which open separately into the heater unit. A vent duct and the differential duct are opened adjacent to each other, and a door is provided between them for alternately opening and closing these ducts, and the side vent duct is opened in a position where it is always open with respect to the door. An automotive heater unit characterized by: