JP2561238Y2 - Heater unit for automotive air conditioner - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater unit for an air conditioner for a vehicle, which is capable of adjusting a difference in air temperature from both outlets to a desired value in a combined mode such as B / L or D / F. is there.

[0002]

2. Description of the Related Art A general automotive air conditioner is shown in FIG.
As shown in FIG. 1, the air conditioner includes an intake unit 11, a cooler unit 12, and a heater unit 13.
The intake unit 11 is a unit that selectively takes in inside air or outside air and sends air to a cooler unit 12 and a heater unit 13 connected on the downstream side. The intake unit 11 includes a fan 14 serving as an air supply source. It rotates at the speed. Fan 14
An outside air inlet 16 for taking in outside air and an inside air inlet 17 for taking in indoor air are opened on the upstream side of
Further, an intake door 18 for selectively opening and closing these two inlets 16 and 17 is provided rotatably.

A cooler unit 12 having a built-in evaporator 19 for circulating a refrigerant of a cooling cycle is connected to a downstream side of the intake unit 11, and air and refrigerant flowing down from the intake unit 11 when an air conditioner switch is input. And has a function of cooling the introduced air by performing heat exchange.

Downstream of the cooler unit 12, a heater unit 13 having a built-in heater core 2 for circulating engine cooling water and heating the introduced air is connected, and has a function of adjusting the introduced air to a desired temperature. It functions to distribute the conditioned air to a desired outlet in the room. In the vicinity of the heater core 2, there is formed a bypass 20 that bypasses the heater core and flows down to the mixing chamber 7 formed downstream of the heater core. A mix door 21 that adjusts the ratio to the amount of air passing through the detour 20 is provided rotatably. The mixed door 21 pivots between a position where the heater core 2 is shielded and all the introduced air is guided to the detour 20, and a position where the mixed door 21 is shielded and the all introduced air is guided to the heater core 2, and the indoor The rotation position of the mix door 21 is determined by the setting of the template bar provided at the position.

On the other hand, into the mixing chamber 7, a hot air is blown toward the inner surface of the windshield to remove the fogging of the glass, and a hot air is blown toward the feet of the occupant to provide a heating effect. An air outlet 10 and a vent air outlet 9 for blowing conditioned air toward the upper body of the occupant to provide a comfortable interior space are provided. In addition, each outlet 8,
A differential door 8D, a vent door 9D, and a foot door 10D for opening and closing respective air outlets are rotatably provided in the air outlets 9 and 10, and various air outlet modes are set by a link mechanism (not shown). As a general blowing mode, only the differential air outlet 8 is opened and a large amount of warm air is supplied to the inner surface of the windshield to rapidly clear the fogging of the glass, and only the vent air outlet 9 is opened. A vent mode for supplying a large amount of conditioned air to the upper body of the occupant to provide a comfortable indoor environment, and opening only the foot air outlet 10 to supply a large amount of warm air to the occupant's feet. A foot mode for providing a heating effect is known, and there is also a so-called composite mode.

The combined mode is a mode in which air is blown out of two of the differential outlet 8, the foot outlet 10, and the vent outlet 9 at the same time.
A bi-level mode (hereinafter referred to as B) in which cold air is blown out of the vent outlet 9 and hot air is blown out of the foot outlet 10 at the same time.
/ L mode), and a differential foot mode (hereinafter abbreviated as D / F mode) in which warm air is blown out of the foot outlet 10 and a slightly lower temperature warm air is blown out of the differential outlet 8 at the same time. It has been known.

[0007]

In the B / L mode of such a combined mode, the cool air is blown out from the vent outlet 9 and the hot air is blown out from the foot outlet 10 simultaneously. The temperature Δt (see FIG. 10) provides a comfortable air-conditioning state of a so-called cold head and foot type. In FIG. 10, F / C represents full cool, and F / H represents full hot.

However, in the conventional heater unit, the temperature difference between the cold air from the vent outlet and the hot air from the foot outlet cannot be changed, and the shape of the heater unit and the arrangement of the components are not changed. Once it was determined, the temperature difference between the cold air and the hot air was determined uniquely. Therefore, for example, in a heater unit mounted on a vehicle for a warm region, it is preferable to increase the temperature difference between the cool air and the warm air to further enhance the sense of cool air given to the occupant by the cool air. In the heater unit mounted on the vehicle, it is preferable to reduce the temperature difference between the cold air and the hot air and supply the relatively high-temperature cold air to the upper body of the occupant. Further, when the solar radiation is strong and the upper body of the occupant is exposed to the solar radiation, the temperature difference is preferably large, and when the solar radiation is not applied, the differential temperature is preferably small. In the conventional heater unit, such adjustment of the temperature difference cannot be realized.

The present invention has been made in view of such problems of the prior art, and has a heater unit capable of adjusting a temperature difference between air blown from both outlets in a combined mode such as a B / L mode. The purpose is to provide.

[0010]

In order to achieve the above object, the present invention provides a heater core (2) for heating introduced air in a casing (1) and bypasses the heater core near both sides of the heater core. A main mix that forms a main detour (3) and an auxiliary detour (4) that flow down, and adjusts the ratio of the amount of air passing through the heater core to the amount of air passing through the detour upstream of the heater core. A door (5) is rotatably provided, and an auxiliary mix door (6) for opening and closing the auxiliary bypass in conjunction with the rotation of the main mix door is rotatably provided, and the heater core is provided downstream of the heater core. Forming a mixing chamber (7) for mixing the air flowing down through the main detour and the auxiliary detour, and in this mixing chamber, a differential outlet (8) for discharging air to the inner surface of the windshield is connected to the auxiliary detour. Road A vent outlet (9) is provided near the flow path and discharges air to the upper body of the occupant near the flow path of the main detour, and a foot outlet (10) discharges air to the foot of the occupant. A heater unit for an air conditioner for an automobile, wherein the heater unit is provided near a flow path of air passing through a heater core, and a rotation speed of an auxiliary mix door is variable with respect to a rotation speed of the main mix door.

[0011]

The air introduced by the intake unit connected upstream of the heater unit is supplied to one of the heater core (2), the main bypass (3), and the auxiliary bypass (4).
Selectively passing through one or more flow paths to a mixing chamber (7),
The air is blown out of the mixing chamber into the room via one or more of the differential outlet (8), the vent outlet (9), and the foot outlet (10).

The auxiliary mix door (6) rotates in conjunction with the main mix door (5), and when the main mix door fully closes the main detour, the auxiliary mix door also fully closes the auxiliary detour. When the main mix door fully opens the main bypass, the auxiliary mix door also fully opens the auxiliary bypass. When the main mix door is rotated to the intermediate position, that is, the temperature control area, the cool air that has passed through the main bypass is mainly led to the vent outlet, while the hot air that has passed through the heater core and the auxiliary bypass have And the cool air that has passed through the mixing chamber are mixed appropriately in the mixing chamber and guided mainly to the foot outlet. As a result, a temperature difference occurs between the air blown out from the vent blowout port and the air blown out from the foot blowout port, so that a so-called cold head-type hot blowout mode is realized.

At this time, when the rotation speed of the auxiliary mix door (6) is changed with respect to the rotation speed of the main mix door (5), the amount of cool air passing through the auxiliary bypass (4) changes.
As a result, the ratio of the amount of air that has passed through the heater core (2) to the amount of air that has passed through the auxiliary bypass (4) changes, and the temperature of the warm air mainly led to the foot outlet (10) changes. Therefore, even when the set temperature, that is, the rotation position of the main mix door (5) is the same, the vent outlet (9)
The temperature difference between the air blown from the air and the air blown from the foot outlet (10) can be made variable.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a heater unit according to one embodiment of the present invention, FIG. 2 is a conceptual diagram showing an air conditioner for a vehicle to which the heater unit of the embodiment is applied, and FIG.
FIG. 4 is a plan view illustrating an example of a link mechanism for operating a main mix door and an auxiliary mix door according to the embodiment. FIG. 4 is a flowchart illustrating control for operating the main mix door and the auxiliary mix door according to another embodiment. FIG. 5 is a graph showing the relationship between the set temperature and the door opening and the relationship between the set temperature and the outlet temperature when the auxiliary mix door is moved to the hot side earlier than the main mix door, and FIG. FIG. 7 is a graph showing the relationship between the set temperature and the door opening and the relationship between the set temperature and the outlet temperature when the mix door is synchronized with the main mix door. FIG. 7 shows that the auxiliary mix door is later than the main mix door. FIG. 8 is a graph showing the relationship between the set temperature and the door opening and the relationship between the set temperature and the blowout temperature when moved to the hot side, and FIG. 8 is a conceptual diagram illustrating the air flow state of the embodiment. .

The heater unit 22 of this embodiment shown in FIG.
Are the intake unit 11 and the cooler unit 12
The air introduced in the intake unit 11 is cooled by the cooler unit 12,
Alternatively, it flows down without cooling and reaches the heater unit 22. The intake unit 11 and the cooler unit 12 have the same configuration as the conventional one, and
The same reference numerals are given to the same members as those shown in FIG. Further, the heater unit 22 of the present invention
May be connected directly to the intake unit 11 without the cooler unit 12.

The heater unit 22 of this embodiment has a function of adjusting various kinds of components inside the casing 1 to adjust the introduced air to a desired temperature, and a function of distributing the conditioned air to a desired outlet in the room. Is in charge of Casing 1
A heater core 2 that circulates engine cooling water and heats the introduced air is provided in the inside, and near both sides of the heater core 2, a mixing chamber formed around the heater core 2 and downstream of the heater core 2. 7, a main detour 3 and an auxiliary detour 4 are formed. A main mix door 5 that adjusts the ratio of the amount of air passing through the heater core 2 to the amount of air passing through the main bypass 3 is provided rotatably on the upstream side of the heater core 2 and is provided indoors. The door opening of the main mix door 5 is determined by operating the template bar. On the other hand, the auxiliary bypass 4 is rotatably provided with an auxiliary mix door 6 that opens and closes so as to adjust the amount of air passing through the auxiliary bypass 4. The deflection plate 6a formed integrally with the auxiliary mix door 6 is for deflecting the cold air passing through the auxiliary bypass 4 into the warm air passing through the heater core 2 to enhance the mixing property. It can be omitted.

The main mix door 5 and the auxiliary mix door 6 are configured to rotate in conjunction with each other.
Basically, when the main mix door 5 fully closes the main bypass 3, the auxiliary mix door 6 also fully closes the auxiliary bypass 4, and when the main mix door 5 fully opens the main bypass 3, the auxiliary mix door 6 closes. The door 6 also fully opens the auxiliary bypass 4.

Such an interlocking operation can also be achieved by a mechanical structure such as a link mechanism as shown in FIG. 3, for example. Figure 4
It can also be achieved by a control procedure as shown in FIG.

The mechanical configuration shown in FIG. 3 is such that a lever 23 is fixed to a rotation shaft 5a of the main mix door 5, and the lever 23
Is connected to a cable 24 that is operated by operating the template bar. Then, the rotation shaft 6 of the auxiliary mix door 6
The lever 25 is also fixed to b, and the main mix door lever 2
3 and the lever 25 of the auxiliary mix door are connected by a rigid body such as a rod 26. Thus, if the cable 24 is moved in and out by operating the template bar, the lever 23 of the main mix door rotates, and at the same time, the lever 25 of the auxiliary mix door also rotates.

In particular, in the present embodiment, the rotation speed of the auxiliary mix door 6 with respect to the rotation speed of the main mix door 5 is intentionally made different. That is, in the embodiment shown in FIG. 5A, the door opening of the main mix door 5 changes linearly with respect to the position of the template bar (set temperature).
The auxiliary mix door 6 rotates so as to close the auxiliary bypass 4 as soon as possible. For example, as shown by the dotted line in FIG. 5A, even when the door opening of the main mix door 5 is 50%, the door opening of the auxiliary mix door 6 is set to 50% or more, and the auxiliary bypass 4 , That is, the amount of cold air flowing down from the auxiliary bypass 4 to the mixing chamber 7 is reduced.
On the contrary, in the embodiment shown in FIG. 7 (A), the auxiliary mix door 6 closes the auxiliary bypass 4 in advance with respect to the main mix door 5 whose opening degree rotates linearly. It is turning. For example, as shown by the dotted line in FIG. 7A, even when the door opening of the main mix door 5 is 50%, the door opening of the auxiliary mix door 6 is set to 50% or less, and the auxiliary bypass 4 , That is, the amount of cold air flowing down from the auxiliary bypass 4 to the mixing chamber 7 is increased. FIG.
In the embodiment shown in FIG. 7A, the rotation speed of the main mix door 5 and the rotation speed of the auxiliary mix door 6 are synchronized, and when the door opening of the main mix door 5 is 50%. The door opening of the auxiliary mix door 6 is also set to 50%. The amount of air passing through the auxiliary bypass 4 in this case is shown in FIG.
7A and the embodiment shown in FIG. 7A.

On the other hand, as a specific example of electrically interlocking the main mix door 5 and the auxiliary mix door 6, the following control can be considered. That is, a motor actuator for rotating the rotation shaft 5a of the main mix door 5 and an actuator for rotating the rotation shaft 6a of the auxiliary mix door 6 are provided, and an outside air temperature sensor for detecting the temperature outside the vehicle compartment is provided. A solar radiation sensor for detecting the amount of solar radiation into the room is provided. As shown in FIG. 4, when the outside air temperature is higher than a predetermined temperature, the auxiliary mix door 6 is moved to the hot side earlier than the main mix door 5. (Steps 1, 2, 3). Even when the outside air temperature is medium or low, if the amount of solar radiation is larger than a predetermined value, the auxiliary mix door 6 is similarly connected to the main mix door 5.
Move to the hot side earlier (steps 2, 4, 3).
If the outside air temperature is medium or low temperature and the amount of solar radiation is an intermediate amount, or if the outside air temperature is medium temperature and the amount of solar radiation is an intermediate amount, the auxiliary mix door 6 is synchronized with the main mix door 5 (step). 4, 5, 6, 7). If the outside air temperature is low and the amount of solar radiation is smaller than the predetermined value, the auxiliary mix door 6 is moved to the hot side later than the main mix door 5 (steps 7 and 8).

When the main mix door 5 and the auxiliary mix door 6 are mechanically linked as described above,
Since one heater unit cannot take various forms as shown in FIGS. 5A to 7A, for example, a heater unit for a warm region and a heater unit for a cold region are set in advance. Will be.

On the other hand, the mixing chamber 7 blows warm air toward the inner surface of the windshield to clear the fogging of the glass, and a differential air outlet 8 blows warm air toward the feet of the occupant to provide a heating effect. An air outlet 10 and a vent air outlet 9 for blowing conditioned air toward the upper body of the occupant to provide a comfortable interior space are provided. Of these, differential outlet 8
Is located downstream of the flow path of the auxiliary detour 4, and the vent outlet 9
Is located downstream of the flow path of the main detour 3, and the foot outlet 10 is located downstream of the flow path of hot air that has passed through the heater core 2.

Each of the outlets 8, 9, 10 has a differential door 8D for opening and closing the respective outlet, a vent door 9D,
And a foot door 10D are provided rotatably,
Various blowing modes are set by a link mechanism (not shown). As the balloon mode of the present embodiment,
A differential mode for opening only the differential outlet 8 to supply a large amount of warm air to the inner surface of the windshield and rapidly clearing the fogging of the glass, and opening only the vent outlet 9 for the upper body of the occupant. A vent mode for supplying a large amount of conditioned air to provide a comfortable indoor environment, a foot for supplying a large amount of warm air to the feet of the occupant by opening only the foot outlet 10 to provide a heating effect. In addition to the mode, a so-called composite mode is set. The combined mode includes a B / L mode in which cold air is blown out of the vent outlet 9 and hot air is blown out of the foot outlet 10 at the same time. D / which blows warm air of slightly low temperature
Although the F mode and the like are set, it is also possible to set the D / F mode II and the like in which the air distribution ratio between the differential outlet and the foot outlet is changed.

Next, the operation will be described. The air introduced by the intake unit 11 selectively passes through at least one of the flow paths of the heater core 2, the main detour 3, and the auxiliary detour 4 via the cooler unit 12 to reach the mixing chamber 7.
Air is blown out of the mixing chamber through one or more of the differential outlet 8, vent outlet 9, and foot outlet 10. The auxiliary mix door 6 rotates in conjunction with the main mix door 5, and when the main mix door 5 fully closes the main bypass 3, the auxiliary mix door 6 also fully closes the auxiliary bypass 4 and the main mix door 6. When 5 opens the main detour 3 fully, the auxiliary mix door 6 also fully opens the auxiliary detour 4.

When the main mix door 5 rotates to the intermediate position, that is, the temperature control region, and the B / L mode is selected, the cool air passing through the main bypass 3 is mainly discharged from the vent outlet 9.
On the other hand, the warm air that has passed through the heater core 2 and the cool air that has passed through the auxiliary bypass 4 are appropriately mixed in the mixing chamber 7 and are mainly led to the foot outlet 10. As a result, a temperature difference occurs between the air blown out from the vent outlet 9 and the air blown out from the foot outlet 10, thereby realizing a so-called hot and cold head blowing mode.

In the embodiment shown in FIG. 5A, the door opening of the main mix door 5 changes linearly with respect to the position of the template bar (set temperature), whereas the auxiliary mix door 6 changes.
Rotates early so as to close the auxiliary detour 4. For example, as shown by a dotted line in FIG. 5A, even when the door opening of the main mix door 5 is 50%, the auxiliary mix door 6 is closed. Is set to 50% or more to reduce the amount of air passing through the auxiliary bypass 4, that is, the amount of cool air flowing from the auxiliary bypass 4 to the mixing chamber 7, as shown in FIG. Thus, the temperature of the warm air discharged from the foot outlet 10 increases, and as a result, the temperature difference Δt1 from the cool air temperature from the vent outlet 9 increases.

Conversely, in the embodiment shown in FIG. 7A, the auxiliary mix door 6 rotates so as to close the auxiliary bypass 4 with respect to the main mix door 5 later. Even if the door opening of No. 5 is 50%, the door opening of the auxiliary mix door 6 is set to 50% or less, and the auxiliary bypass 4
, That is, from the auxiliary bypass 4 to the mixing chamber 7
The amount of cold air that flows down is increased. Therefore, FIG.
As shown in (B), the temperature of the warm air discharged from the foot outlet 10 decreases, and as a result, the temperature difference Δt3 from the cool air temperature from the vent outlet 9 decreases.

In the embodiment shown in FIG. 6 (A), the main mix door 5 and the auxiliary mix door 6 are rotated while being synchronized, so that the foot outlet is provided as shown in FIG. 6 (B). The temperature of the hot air discharged from 10 is intermediate between the embodiment shown in FIG. 5A and the embodiment shown in FIG.
As a result, the temperature difference Δt from the cool air temperature from the vent outlet 9
2 also satisfies Δt1>Δt2> Δt3.

As described above, even when the set temperature, that is, the turning position of the main mix door 5 is the same, the temperature difference between the air blown out from the vent outlet 9 and the air blown out from the foot outlet 10 can be made variable. For example, if the heater unit of the embodiment shown in FIG. 5 (A) is mounted on an automobile for a warm region, the temperature difference between the cold air and the hot air is increased so that the cold air gives the occupant a feeling of cold air. Can be stronger. Conversely, if the heater unit of the embodiment shown in FIG. 7 (A) is mounted on an automobile for cold regions, the temperature difference between the cold air and the hot air is reduced so that the relatively high temperature of the occupant's upper body can be reduced. Can be supplied.

In the heater unit for electrically controlling the rotation speed of the main mix door and the rotation speed of the auxiliary mix door as shown in FIG. 4, only the program input to the control means is changed. It is possible to create a temperature difference between the upper and lower sides suitable for the outside air condition in which the vehicle is placed.

In the above-described embodiment, B / B
Although the L mode has been described as an example, the heater unit of the present invention is not limited to the B / L mode only,
The present invention can be applied to the F mode and other composite modes.

[0033]

As described above, according to the present invention, the main mix door and the auxiliary mix door for opening and closing the main detour and the auxiliary detour formed on both sides of the heater core are rotated in conjunction with each other. In addition, since the rotation speed of the auxiliary mix door with respect to the rotation speed of the main mix door is made variable, the temperature difference between the air discharged from the two outlets in the combined mode can be freely changed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a heater unit according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing an air conditioner for a vehicle to which the heater unit of the embodiment is applied.

FIG. 3 is a plan view showing an example of a link mechanism for operating a main mix door and an auxiliary mix door according to the embodiment.

FIG. 4 is a flowchart illustrating control for operating a main mix door and an auxiliary mix door according to another embodiment.

FIG. 5 is a graph showing a relationship between a set temperature and a door opening and a relationship between a set temperature and a blowout temperature when an auxiliary mix door is moved to a hot side earlier than a main mix door.

FIG. 6 is a graph showing a relationship between a set temperature and a door opening and a relationship between a set temperature and a blowout temperature when an auxiliary mix door is synchronized with a main mix door.

FIG. 7 is a graph showing a relationship between a set temperature and a door opening and a relationship between a set temperature and a blowout temperature when an auxiliary mix door is moved to a hot side later than a main mix door. .

FIG. 8 is a conceptual diagram illustrating a flow state of air according to the embodiment.

FIG. 9 is a conceptual diagram showing a conventional air conditioner for a vehicle.

FIG. 10 is a graph showing blow temperature with respect to set temperature in a conventional B / L mode.

[Description of Signs] 1 ... Casing 2 ... Heater core 3 ... Main detour 4 ... Auxiliary detour 5 ... Main mix door 6 ... Auxiliary mix door 7 ... Mixing chamber 8 ... Differential outlet 9 ... Vent outlet 10 ... Foot outlet

Claims (1)

(57) [Scope of request for utility model registration] A heater core (2) for heating introduced air is provided in a casing (1), and a main detour (3) and an auxiliary detour (4) that flow around the heater core in the vicinity of both sides of the heater core. And a main mix door (5) that adjusts the ratio of the amount of air passing through the heater core to the amount of air passing through the detour is provided rotatably upstream of the heater core. An auxiliary mix door (6) that opens and closes the auxiliary bypass in conjunction with the rotation of the door is rotatably provided, and air that has flowed downstream of the heater core through the heater core, the main bypass, and the auxiliary bypass. A mixing chamber (7) for mixing air is formed, and in this mixing chamber, a differential air outlet (8) for discharging air to the inner surface of the windshield is opened near the flow path of the auxiliary bypass, and air is supplied to the upper body of the occupant. Vessel to discharge And a foot outlet (10) for discharging air to the feet of the occupant is opened near the flow path of the air that has passed through the heater core. A heater unit for an air conditioner for an automobile, wherein the rotation speed of the auxiliary mix door is variable with respect to the rotation speed of the mix door.