JP3689979B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to improvement of a passenger's feeling of heating in a vehicle air conditioner, and particularly relates to improvement of a feeling of heating of a rear seat passenger.
[0002]
[Prior art]
A conventional vehicle air conditioner 100 is shown in FIG. In this vehicle air conditioner 100, an evaporator 102 is disposed in a case 101 that forms a flow path, and a heater core 103 is disposed in a part of the flow path on the downstream side of the evaporator 102. In the case 101, there are formed a cold air passage 104 through which the cold air that has passed through the evaporator 102 bypasses the heater core 103 and a hot air passage 105 through which the hot air that has passed through the heater core 103 flows.
[0003]
The downstream side of the cold air passage 104 and the hot air passage 105 is branched into three, and the face communicates corresponding to each of the well-known face air outlet, foot air outlet, and defroster air outlet provided in the passenger compartment. An air passage 106, a foot air passage 107, and a defroster air passage 108 are formed. The foot air passage 107 is formed with a front seat foot blowing portion 109 for blowing air-conditioned air to the feet of the front seat occupant. Further, the front seat foot blowing portion 1 is formed. 09 A rear seat foot outlet 110 for blowing conditioned air to the feet of the rear seat occupant is formed on the downstream side of the air. Therefore, in the foot mode and foot differential mode in which the passenger compartment is heated, air-conditioning air is blown from both the front and rear seat passengers to give a feeling of heating to the front and rear seat passengers.
[0004]
[Problems to be solved by the invention]
By the way, after the warm air passage 105 described above passes through the heater core 103, a flow path is formed so as to extend upward in the figure, and the foot air passage 10 located on the downstream side of the hot air passage 105. 7 Is formed to extend downward. Therefore, for example, in the foot mode, particularly, the warm air that has passed through the heater core 103 flows into the rear seat foot outlet 110 in a U-turn through the warm air passage 105 and the foot air passage 107. .
[0005]
Accordingly, the flow path length until the air is blown to the rear seat foot outlet 110 is increased, the ventilation resistance is increased, and the rear seat foot outlet 11 is increased. 0 The temperature of the conditioned air blown from the rear-seat foot blowing unit 110 due to heat loss during the U-turn flow through the hot air passage 105 and the foot air passage 107 decreases. There is a problem that it is lowered, and it is impossible to give a sufficient feeling of heating to the rear seat passengers as compared to the front seat passengers.
[0006]
As a result, when the front seat occupant feels hot, for example, if the temperature control lever installed in the front seat of the passenger compartment is operated to lower the temperature, the rear seat occupant does not yet have a sufficient feeling of heating. .
Therefore, an object of the present invention is to bring the feeling of heating of the front seat occupant close to the feeling of heating of the rear seat occupant.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, claims 1 to 6 In the described invention, one end side communicates with the downstream side of the heat exchanger for heating (4) and the upstream side of the turn channel (7, 11), and the other end side is downstream of the front seat foot outlet (13). And a bypass passage (15) formed so as to communicate with the rear seat foot outlet (14) and a bypass opening / closing means (16) for opening and closing the bypass passage (15). At the time of heating in which warm air is blown from the section (13) and the rear seat foot outlet (14), the bypass passage (15) is opened by the bypass opening / closing means (16), and heating is performed through the bypass passage (15). Part of the warm air that has passed through the heat exchanger (4) is blown to the rear seat foot outlet (14).
[0008]
Thereby, at the time of the heating which blows warm air from the foot blowing part for the front seats and the foot blowing part for the rear seats, the part that has passed the heating heat exchanger passes through the bypass passage that bypasses the U-turn flow path, The air is blown to the foot blowing section.
Therefore, by bypassing the turn flow path, the amount of air blown out from the rear seat foot blowing portion can be increased. Moreover, since the heat loss of the turn flow path can be eliminated as the air volume increases, the temperature at which the air is blown from the rear seat foot blowing portion can be increased.
[0009]
And since the increase in the amount of air blown to the rear seat foot outlet and the outlet temperature from the rear seat foot outlet can be increased in this way, the feeling of heating of the rear seat occupant is improved. As a result, the feeling of heating for the front seat occupant and the feeling of heating for the rear seat occupant can be made closer. In particular, the claims 1, 2 In the described invention, in the heating heat exchanger (4), warm water as a heat source flows inside, and the heating heat exchanger (4) includes a heat exchange section (4b) for exchanging heat between the warm water and air, Provided on one end side of the heat exchanging part (4b), provided on the other end side of the inlet tank (4c) forming the hot water inlet part of the heat exchanging part (4b) and the heat exchanging part (4b), It has an outlet tank (4d) that exchanges heat with air in the exchange part (4b) and forms an outlet part of hot water of the heat exchanger, and the heat exchange part (4b) has hot water from the inlet tank (4c). It is configured to flow linearly toward the outlet tank (4d), and one end side of the bypass passage is open to the inlet tank (4c) side of the heat exchange part (4b). Yes.
[0010]
Thereby, since the heat exchanging part of the heat exchanger for heating is configured to flow linearly from the inlet tank to the outlet tank, the hot air passing through the inlet tank side of the heat exchanging part It becomes hotter than the warm air that has passed through the outlet tank side of the part.
And since one end side of the bypass passage opens to the inlet tank side of the heat exchanging section, the temperature of the hot air blown to the rear seat foot blow-out section through the bypass passage can be increased. The feeling of heating for the passengers and the feeling of heating for the rear-seat passengers can be made closer.
[0011]
In particular, the claims 6 In the described invention, it has rear seat occupant signal generation means (25) for generating a signal indicating that there is an occupant in the rear seat of the vehicle, and the rear seat occupant signal generation means (25) allows the occupant to It is characterized in that the bypass passage (15) is opened by the bypass opening / closing means (16) when a signal is generated.
[0012]
Thereby, when there exists a passenger | crew in a vehicle backseat, a feeling of heating of a backseat passenger | crew can be raised.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments shown in the drawings will be described below.
(First embodiment)
FIG. 1 shows an overall configuration diagram of a vehicle air conditioner 1. FIG. 2 shows a schematic diagram of the control device 20 of the vehicle air conditioner 1.
[0014]
The vehicle air conditioner 1 according to the present embodiment includes an inside / outside air blower unit (not shown) and an air conditioner unit 2 that houses an air conditioner heat exchanger described later.
The inside / outside air blowing unit is for blowing inside air or outside air to the air conditioner unit 2. The inside / outside air blowing unit is provided with an inside air introduction port, an outside air introduction port, and an inside / outside air switching door that selectively switches between these introduction ports. In the inside / outside air blowing unit, a blower for blowing inside or outside air from the inside air introduction port or the outside air introduction port to the air conditioner unit 2 is provided.
[0015]
The air conditioner unit 2 is arranged so as to be aligned with the above-described inside / outside air blowing unit in the vehicle width direction (front and back direction in FIG. 1), and the air conditioner unit 2 takes in the air intake for taking in the blowing air from the inside / outside air blowing unit. An inlet 5 is formed. In the air conditioner unit 2, an evaporator 3 (cooling heat exchanger) that cools the passing air and a heater core 4 (heating heat exchanger) that cools the passing air are arranged in the vehicle longitudinal direction. Inside and outside air blowing unit from The blown air is blown in the order of the evaporator 3 and the heater core 4 from the front of the vehicle toward the rear of the vehicle.
[0016]
Note that the evaporator 3 constitutes a constituent part of a known refrigeration cycle apparatus, and details thereof are omitted here. The heater core 4 uses engine cooling water (hereinafter, hot water) as a heat source, and will be described in detail later.
Further, the heater core 4 is disposed in a part of the downstream air flow path of the evaporator 3. Thereby, in the air conditioner unit 2, a cold air passage 6 where the cold air cooled by the evaporator 3 bypasses the heater core 4 and a hot air passage 7 through which the hot air heated by the heater core 4 flows are formed. .
[0017]
The cold air passage 6 and the hot air passage 7 are formed so as to be lined up in the vertical direction, and the heater core 4 is disposed in the lower part of the air conditioner unit 2. 7 is located above.
The air volume ratio between the cold air passage 6 and the hot air passage 7 is adjusted by an air mix door 8 which is a mixing ratio adjusting door, and the temperature of the conditioned air is adjusted to a desired temperature by the air mix door 8. . In the present embodiment, the air mix door 8 is rotated by a servo motor 8a (see FIG. 2) as a driving means.
[0018]
Further, as shown in FIG. 1, the hot air passage 7 is formed to extend upward, and for this reason, the cold air flowing through the cold air passage 6 and the hot air flowing through the hot air passage 7 are orthogonal to each other. This is because the cold air and the hot air are mixed well by hitting.
On the downstream side of the cold air passage 6 and the hot air passage 7, air passages 9 to 11 provided corresponding to the respective air outlets installed in the vehicle compartment are formed. Specifically, a defroster air passage 9 for blowing conditioned air toward the inner surface of the vehicle window glass, a face air passage 10 for blowing conditioned air toward the upper body of the front seat occupant, A foot air passage 11 for blowing conditioned air toward the feet of the front and rear passengers is formed.
[0019]
In addition, the foot air passage 11 is formed so that the conditioned air flows from the upper side to the lower side, and the front seat foot blowing portion 13 for blowing the conditioned air to the feet of the front seat occupant is formed. Yes. Further, a rear seat foot blow-out portion 14 is formed on the downstream side of the front seat foot blow-out portion 13 for blowing conditioned air to the feet of the rear seat occupant.
[0020]
Therefore, when the warm air that has passed through the heater core 4 is blown to the front seat foot blowing portion 13 and the rear seat foot blowing portion 14, the warm air flows from below to above in the warm air passage 7. The air is sent to the foot air passage 11 in a U-turn. The rear seat foot outlet 14 is formed on the downstream side of the foot air passage 11 which is a flow path after the U-turn.
[0021]
The rear seat foot outlet 14 is connected to an extension duct (not shown) arranged so as to extend in the vehicle front-rear direction, so that a rear seat foot outlet ( (Not shown).
The opening and closing of these air passages 9 to 11 are switched by the blowout switching doors 12 and 13. Further, the blowout switching doors 12 and 13 are rotated by servo motors 12a and 13a as driving means (see FIG. 2). Further, a predetermined blowing mode to be described later is switched by these blowing switching doors 12 and 13.
[0022]
In the present embodiment, as shown in the drawing, one end side of the air conditioner unit 2 communicates with the downstream side of the heater core 4 and the upstream side of the warm air passage 7 and the other end side is downstream of the foot air passage 11. A bypass passage 15 is formed so as to communicate with the rear seat foot blowing portion 14 on the side and downstream of the front seat foot blowing portion 13 so as to bypass the warm air passage 7 and the foot air passage 11.
[0023]
The bypass passage 15 is formed so as to extend from the vehicle front side to the vehicle rear side, and is opened and closed by a bypass door 16 disposed just on the vehicle rear side of the heater core 4. Further, the bypass door 16 is opened and closed by, for example, a servo motor 16a as driving means (see FIG. 2).
Next, the control device 20 of the vehicle air conditioner 1 shown in FIG. 2 will be briefly described. The control device 20 has a combustor means such as a well-known RAM, ROM, etc., and according to the air conditioning environment, the rotation position (hereinafter referred to as opening) of the air mix door 8, the switching doors 12, 13, and the bypass door. The 16 rotation positions (hereinafter referred to as opening degrees) are automatically adjusted and switched.
[0024]
As input terminals of the control device 20, there are a temperature setting device 21 that sets the set temperature in the vehicle interior, an outside air sensor 22 that detects the outside air temperature, an inside air sensor 23 that detects the inside temperature of the vehicle, and engine cooling that flows into the heater core 4. A water temperature sensor 24 for detecting the temperature of the water is connected. Note that the input terminals surrounded by a dotted line in FIG. 2 are used in other embodiments described later, and are not related to this embodiment.
[0025]
On the other hand, the servo motors 8a, 12a, 13a, and 16a described above are connected as output terminals of the control device 20.
The control device 20 controls the opening of the air mix door 8 based on the information from the input terminal. The opening control of the air mix door 8 is well known and will be briefly described. To do.
[0026]
The control device 20 calculates a target blowing temperature that is a target temperature of the conditioned air blown into the vehicle interior based on the air conditioning information from the input terminal. Then, it is determined that the cooling load in the passenger compartment increases as the target blowing temperature decreases, and the mixing ratio of the cool air and the warm air adjusted by the air mix door 8 is controlled so that the cool air becomes larger.
On the other hand, the control device 20 determines that the heating load in the passenger compartment is larger as the target blowing temperature becomes higher, and controls the mixing ratio of the cold air and the warm air adjusted by the air mix door 8 so that the hot air becomes larger. .
[0027]
Further, the control device 20 determines the blowing mode in accordance with the target blowing temperature. To briefly describe this, the face mode, the bi-level mode, and the footing described later as the target blowing temperature increases. The blowing mode is automatically switched in the order of mode and foot differential mode.
Hereinafter, the operation of the blowing switching doors 12 and 13 and the bypass door 16 in the predetermined blowing mode and how to flow the conditioned air will be described.
[0028]
▲ 1 ▼ Face mode
In the face mode, the blowing switching door 12 is set to the rotation position indicated by a in FIG. 1, the air intake port of the defroster air passage 9 is fully closed, and the blowing switching door 13 is set to the rotation position indicated by d in FIG. The face air passage 10 is fully opened, and the air intake port of the foot air passage 11 is fully closed. Further, the bypass door 16 is set to a rotation position indicated by i in the drawing, and is set to a rotation position for closing the bypass passage 15.
[0029]
Thereby, the conditioned air temperature-controlled by the air mix door 8 flows only through the face air passage 10.
(2) Bi-level mode
The bi-level mode is a blowout mode in which cool air is blown to the face air passage 10 and hot air is blown to the foot air passage 11 in order to achieve a cold head heat that is a sensation of the occupant in an intermediate period such as spring and autumn. .
[0030]
In the bi-level mode, the air outlet of the face air passage 10 and the foot air passage 11 is opened with the blowout switching door 13 at the intermediate rotation position indicated by f in FIG. Further, the blowout switching door 12 is set to the intermediate rotation position in FIG. 1a, and the air intake port of the defroster air passage 9 is fully closed. Further, the bypass door 16 is set to a rotation position indicated by i in the drawing and is set to a rotation position for closing the bypass passage 15.
[0031]
As a result, the conditioned air adjusted in temperature by the air mix door 8 is sent to the face air passage 10 and the foot air passage 11 by about half a figure.
(3) Foot mode
In the foot mode, the air outlet of the face air passage 10 is closed and the air inlet of the foot air passage 11 is fully opened while the blowout switching door 13 is set at the rotational position indicated by c in FIG. And let the blowing switch door 12 be an intermediate rotation position shown by g in FIG. Further, the bypass door 16 fully opens the bypass passage 15 as a rotation position indicated by k in FIG.
[0032]
Thereby, most (about 90%) of the conditioned air temperature-controlled by the air mix door 8 is blown to the foot air passage 11, and the remaining conditioned air is blown to the defroster air passage 9. become.
More specifically, in the foot mode, the bypass door 16 causes the tip of the bypass door 16 to abut against the ventilation surface 4a on the downstream side of the heater core 4 so that the warm air that has passed through the heater core 4 passes through the bypass passage 15 and the warm air passage. 7 and diverted into two.
[0033]
That is, in the foot mode, the flow of conditioned air to the front seat foot outlet 13 and the rear seat foot outlet 14 is different from the bi-level mode. In the foot mode, the warm air blown from the ventilation surface 4a located above the heater core 4 flows into the defroster air passage 9 and the foot air passage 11 as shown by arrows A and B in FIG. . On the other hand, warm air blown out from the ventilation surface 4 a located below the heater core 4 flows into the bypass passage 15.
[0034]
As a result, the rear seat foot outlet 14 mixes the warm air that has passed through the hot air passage 7 and the cold air that has passed through the cold air passage 6 as in the bi-level mode, and the conditioned air that has passed through the heater core 4. Is not blown so as to make a U-turn in the hot air passage 7 and the foot air passage 11, but the bypass passage 1 5 As a result, the hot air that has passed through the heater core 4 is not mixed with the cold air but is directly blown to the rear seat foot outlet 14 as shown by the arrow C in FIG.
[0035]
The reason for this is that the extension duct is connected to the rear seat foot outlet 14 as described above, so the temperature of the conditioned air actually blown from the rear seat is the heat loss in this extension duct. Thus, the temperature of the conditioned air blown out from the front seat foot blowing portion 13 becomes lower.
Further, if the conditioned air is blown through the warm air passage 7 and the foot air passage 11 through the hot air passage 7 and the foot air passage 11 without further providing the bypass passage 15, the rear seat foot blowing portion 14 increases the ventilation resistance. While the amount of air blown to the foot blowing portion 14 is reduced, the temperature of the conditioned air blown to the rear seat foot blowing portion 14 is lowered due to heat loss between the warm air passage 7 and the foot air passage 11.
[0036]
Therefore, in the present embodiment, the warm air that has passed through the heater core 4 is passed through the bypass passage 15 so as to bypass the warm air passage 7 and the foot air passage 11. 4 Because it was blown directly to the rear seat foot blowout part 1 4 Can be increased, and heat loss in the warm air passage 7 and the foot air passage 11 can be eliminated. Thereby, the foot blowing part 1 for rear seats 4 The temperature of the conditioned air blown out from the air can be increased.
[0037]
As a result, the feeling of heating for the front seat occupant and the feeling of heating for the rear seat occupant can be made closer.
(4) Foot differential mode
In the foot differential mode, the blowout switching door 13 is set to the rotation position indicated by c in FIG. 1 to close the air intake port of the face air passage 10, and the blowout switching door 12 is set to the intermediate rotation position indicated by e in FIG. The air intake ports of the foot air passage 11 and the defroster air passage 9 are opened. Further, the bypass door 16 is set to a rotational position indicated by k in the drawing similarly to the foot mode, and the bypass passage 15 is fully opened.
[0038]
Thereby, the conditioned air temperature-controlled by the air mix door 8 is sent to both the defroster air passage 9 and the foot air passage 11. In this foot differential mode, about half of the conditioned air temperature controlled by the air mix door 8 is blown to the foot air passage 11 and the other half is blown to the defroster air passage 9. Yes.
[0039]
And also in this foot differential mode, since the bypass passage 15 is open, the feeling of heating to the front seat occupant and the feeling of heating to the rear seat occupant can be brought close to each other as in the foot mode.
In the present embodiment, it has been described that the bypass passage 15 is fully opened in the foot mode and the foot differential mode. However, this may be automatically performed by the control device 20. Specifically, since the blowing mode is determined based on the air conditioning information from the input terminal, when a signal is generated in the control device 20 that the blowing mode becomes the foot mode or the foot differential mode, A signal that fully opens the bypass passage 15 at the bypass door 16 may be output to the servo motor 16a.
[0040]
(5) Defroster mode
In the defroster mode, the air inlets of the face air passage 10 and the foot air passage 11 are closed with the blowing switching door 12 at the rotational position indicated by b in FIG. Further, the bypass passage 15 is closed with the bypass door 16 as a rotational position indicated by i in FIG.
[0041]
As a result, the conditioned air temperature-controlled by the air mix door 8 flows only through the defroster air passage 9. Note that this defroster mode is not switched over when a defroster switch (not shown) provided in the passenger compartment is not turned on.
By the way, the present embodiment has a feature in the opening position of one end side (air intake port) of the bypass passage 15 with respect to the heater core 4 in order to make the heating feeling of the front seat occupant closer to the heating sensation of the rear seat occupant.
[0042]
That is, the configuration of the heater core 4 will be briefly described. The heater core 4 is formed of a metal such as aluminum. The heater core 4 has a heat exchanging portion 4b for allowing warm water to flow therein and exchanging heat between the warm water and the air that has passed through the evaporator 3. , An inlet tank 4c provided on one end side of the heat exchanging part 4b and forming an inlet part of hot water of the heat exchanging part 4b, and an outlet part of hot water provided on the other end side of the heat exchanging part 4b. And an outlet tank 4d.
[0043]
The heat exchanging section 4b is configured such that flat tubes (not shown) in which flow paths are linearly formed are stacked in the front and back direction of the paper surface in FIG. 1, and heat exchange efficiency is obtained between the flat tubes. Corrugated fins (not shown) for raising are provided.
In the present embodiment, the inlet tank 4c and the outlet tank 4d are arranged so that the inlet tank 4c is positioned above the outlet tank 4d as shown in FIG. And the heat exchange part 4b is comprised so that the above-mentioned flat tube may flow linearly from the inlet tank 4c toward the outlet tank 4d.
[0044]
Therefore, the temperature of the hot air blown out from the ventilation surface 4a of the heat exchanging part 4b located on the inlet tank 4c side is located on the outlet tank 4d side. Through It becomes higher than the temperature of the warm air blown out from the wind surface 4a. Therefore, in the present embodiment, as shown in FIG. 1, by opening one end side (air intake port) of the bypass passage 15 to the inlet tank 4 c side, hot air having a higher temperature can be blown to the bypass passage 15. In addition, the feeling of heating of the front seat occupant and the feeling of heating of the rear seat occupant can be made closer.
[0045]
The meaning of opening one end side of the bypass passage 15 toward the inlet tank 4c means that the temperature of the warm air that passes through the heater core 4 and is blown into the bypass passage 15 flows upward through the heater core 4. This means that the temperature is higher than the temperature of the warm air, and the opening position on one end side of the bypass passage 15 is not limited to that shown in FIG. 1, but may be slightly above, for example, FIG.
[0046]
(Second Embodiment)
In the first embodiment, in the foot mode or the foot differential mode, the bypass passage 15 is simply fully opened to bring the feeling of heating to the front seat occupant close to the feeling of heating to the rear seat occupant. An example in which the device 20 automatically performs fine-tuned opening / closing control of the bypass passage 15 in accordance with the temperature sensation of the rear seat occupant will be described with reference to the flowchart of FIG.
[0047]
Further, in the present embodiment, as enclosed by the dotted line in FIG. 2, a rear seat occupant presence / absence switch 25 that changes the control content of the bypass door 15 according to the presence or absence of the rear seat occupant as an input terminal of the control device 20, A rear seat priority switch 26 is connected to increase the heating feeling of the rear seat occupant over the front seat occupant.
First, in step S100, it is determined whether or not the blowing mode is selected as the foot mode or the foot differential mode based on the air conditioning information from the input terminal of the control device 20, and when it is not the foot mode or the foot differential mode, step S400 is performed. Then, the bypass passage 15 is closed by the bypass door 15.
[0048]
If it is determined in step S100 that the foot mode or the foot differential mode is selected, it is determined in step S200 whether or not the rear seat occupant presence / absence switch 25 is turned on.
When the rear seat occupant presence / absence switch 25 is not turned on, that is, when there is no rear seat occupant, the process proceeds to step S400. If there is no rear seat occupant even in the foot mode, the bypass passage 15 is opened to open the rear seat. Since there is no need to increase the temperature of the conditioned air blown from the foot blowout section 14 or increase the air volume, the bypass door 16 is closed and the bypass passage 15 is closed.
[0049]
On the other hand, when the rear seat occupant presence / absence switch 25 is turned on and a signal indicating that there is an occupant in the rear seat is generated, the process proceeds to step S300 to determine whether or not the rear seat priority switch 26 is further turned on. To do. If it is determined that the rear seat priority switch 26 is turned on, the process proceeds to step S500 and the bypass door control 1 is set.
[0050]
Further, if it is determined that the rear seat priority switch 26 is not turned on, the process proceeds to step S600 and the bypass door control 2 is set.
Hereinafter, the bypass door control 1 and the bypass door control 2 will be described with reference to FIG. 4. The bypass door 16 in this example controls the bias door 16 according to the opening degree of the air mix door 8. As shown in FIG. 4, the air mix door 8 has an opening degree of Max Cool (MAXCOOL, a state where all the air that has passed through the evaporator 3 is blown to the heater core 4 and can be said to be in a cooling state). As the air turns to the side where all the air passes through the heater core 4 (which can be said to be a heating state) (as it turns in the direction of arrow D in FIG. 1), the bypass passage 15 is turned in the direction of arrow E in FIG. The bypass passage 15 is controlled to be opened gradually.
[0051]
Further, in this example, the opening degree of the bypass door 16 with respect to the opening degree of the air mix door 8 is set to be different depending on the state of the rear seat priority switch 26.
That is, the bypass door control 1 and the bypass door control 2 are different in the timing when the bypass passage 15 is opened with respect to the opening degree of the air mix door 8, and the bypass door control 1 is indicated by a one-dot chain line in FIG. The bypass passage 15 is opened earlier than the bypass door control 2 (indicated by a two-dot chain line in FIG. 4).
[0052]
That is, in the bypass door control 1, since the rear seat priority switch 26 is turned on, the feeling of heating from the front seat occupant to the rear seat occupant is emphasized. For example, the opening degree of the air mix door 8 is D in FIG. Even in the air mix region where the cold air and the hot air shown are mixed, the bypass passage 15 is slightly opened.
Then, as shown in FIG. 1, the front seat foot outlet 13 is supplied with conditioned air in which the cold air and the hot air flowing through the cold air passage 6 and the hot air passage 7 are mixed. In addition to the conditioned air in which the cold air and the warm air are mixed, the warm air that has passed through the heater core 4 from the bypass passage 15 is directly blown to the foot blowing unit 14.
[0053]
As a result, compared with when the bypass passage 15 is closed, a high-temperature conditioned air is blown to the rear-seat foot blow-out portion 14, and the rear air-compression door 8 is opened regardless of the opening degree. A feeling of heating can be given to a seat occupant. Further, at this time, as the heating load in the passenger compartment increases, it becomes easier for the rear passenger to feel a lack of heating feeling, so the heating load increases. That is, as the air mix door 8 rotates to the max hot side, The opening is increased.
[0054]
Further, in the bypass control 1, the heating feeling of the rear seat occupant is not given priority over the heating feeling of the front seat occupant, and the heating sensation of the front seat occupant regardless of the opening degree of the air mix door 8 in the foot mode or the foot differential mode. And the rear passenger's feeling of heating is adjusted to be almost the same.
Although the embodiments of the present invention have been described above, the present invention can also be applied to modifications as described below.
[0055]
In the above-described embodiment, the present invention is applied to the one that automatically switches the blowing mode. However, the present invention may be applied to a manual type vehicle air conditioner that switches the blowing mode by an occupant's operating force using an outlet switching lever or the like. In this case, for example, the outlet switching lever and the bypass door 16 are interlocked so that the bypass passage 15 is fully opened when the operation position of the outlet switching lever is in the foot mode or the foot differential mode. It ’s fine.
[0056]
Further, one end side (air intake port) of the bypass passage 15 may be opened to the inlet tank 4 d side of the heater core 4.
Further, the present invention does not limit the arrangement structure of the evaporator 3 and the heater core 4, and can be applied to any arrangement structure.
In the first embodiment, as a matter of course, the bypass door 16 may gradually open the bypass passage 15 as the opening degree of the air mix 8 changes from the max cool side to the max hot side in the foot mode.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a vehicle air conditioner according to an embodiment of the present invention.
FIG. 2 is a configuration diagram of a control device for a vehicle air conditioner in the above embodiment, and a configuration diagram of a control device for a vehicle air conditioner in another embodiment of the present invention.
FIG. 3 is a flowchart showing the operation of the bypass door 16 in another embodiment of the present invention.
FIG. 4 is a diagram showing the correlation between the opening degree of bypass door 16 and the opening degree of air mix door 8 in the embodiment described above.
FIG. 5 is an overall configuration diagram of a conventional vehicle air conditioner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Evaporator, 4 ... Heater core, 7 ... Warm air passage, 11 ... Foot air passage, 13 ... Front seat foot blowing part, 14 ... Rear seat foot blowing part, 15 ... Bypass passage, 16 ... Bypass door

Claims (6)

The temperature of the conditioned air is adjusted by mixing the cold air cooled in the cooling heat exchanger (3) and the warm air heated by passing through the heating heat exchanger (4) in the mixing region, Before the warm air passing through the heating heat exchanger (4) on the downstream side of the heating heat exchanger (4) blows conditioned air to the feet of the front seat passenger via the mixing region A turn channel (7, 11) through which the seat foot outlet (13) is guided;
Further, in the vehicle air conditioner provided with a rear seat foot outlet (14) for blowing conditioned air to the feet of the rear seat occupant on the downstream side of the turn channel (7, 11),
One end side communicates with the downstream side of the heating heat exchanger (4) and the upstream side of the turn channel (7, 11), and the other end side is the downstream side of the front seat foot outlet (13), A bypass passage (15) formed to communicate with the rear seat foot outlet (14) and to bypass the turn passages (7, 11);
Bypass opening and closing means (16) for opening and closing the bypass passage (15),
At the time of heating to blow warm air from the front seat foot outlet (13) and the rear seat foot outlet (14), the bypass opening / closing means (16) opens the bypass passage (15), A vehicle air conditioner for blowing a part of the warm air that has passed through the heating heat exchanger (4) through the bypass passage (15) to the rear seat foot outlet (14) ;
In the heating heat exchanger (4), hot water as a heat source flows inside,
The heating heat exchanger (4)
A heat exchange section (4b) for exchanging heat between the hot water and air;
An inlet tank (4c) provided on one end side of the heat exchange part (4b) and serving as an inlet part of the hot water of the heat exchange part (4b);
An outlet tank (4d) is provided on the other end side of the heat exchange section (4b), exchanges heat with air in the heat exchange section (4b), and forms an outlet section of hot water of the heat exchanger. ,
The heat exchange part (4b) is configured such that warm water flows linearly from the inlet tank (4c) toward the outlet tank (4d),
One end side of the bypass passage (15) opens to the inlet tank (4c) side of the heat exchanging part (4b) . A cooling heat exchanger (3) that cools the air passing therethrough and a heating heat exchanger (4) that heats the air that has passed through the cooling heat exchanger (3) are arranged in the vehicle front-rear direction and cooled. The temperature of the conditioned air is adjusted by mixing the cool air passing through the heat exchanger (3) and bypassing the heating heat exchanger (4) with the warm air passing through the heating heat exchanger (4). Configured to adjust,
On the downstream side of the heating heat exchanger (4), the front seat foot outlet (1 3 ) extends upward and then downwards, and blows conditioned air toward the feet of the front seat occupant. ) -Shaped turn flow path (7, 11) provided with
In the vehicle air conditioner in which the rear seat foot outlet (14) for blowing the conditioned air to the feet of the rear seat occupant is formed on the downstream side of the turn flow path,
One end side communicates with the downstream side of the heating heat exchanger (4) and the upstream side of the turn channel (7, 11), and the other end side is the downstream side of the front seat foot outlet (13), A bypass passage (15) formed to communicate with the rear seat foot outlet (14) and to bypass the turn passages (7, 11);
Bypass opening and closing means (16) for opening and closing the bypass passage (15),
At the time of heating to blow warm air from the front seat foot outlet (13) and the rear seat foot outlet (14), the bypass opening / closing means (16) opens the bypass passage (15), A vehicle air conditioner for blowing a part of the warm air that has passed through the heating heat exchanger (4) through the bypass passage (15) to the rear seat foot outlet (14) ;
In the heating heat exchanger (4), hot water as a heat source flows inside,
The heating heat exchanger (4)
A heat exchange section (4b) for exchanging heat between the hot water and air;
An inlet tank (4c) provided on one end side of the heat exchange part (4b) and serving as an inlet part of the hot water of the heat exchange part (4b);
An outlet tank (4d) is provided on the other end side of the heat exchange section (4b), exchanges heat with air in the heat exchange section (4b), and forms an outlet section of hot water of the heat exchanger. ,
The heat exchange part (4b) is configured such that warm water flows linearly from the inlet tank (4c) toward the outlet tank (4d),
One end side of the bypass passage (15) opens to the inlet tank (4c) side of the heat exchanging part (4b) . A mixing ratio adjusting door (8) for adjusting the temperature of the conditioned air by adjusting the mixing ratio of the cold air and the hot air;
The mixing ratio by the mixing ratio adjusting door (8) is configured such that the bypass passage (15) is opened by the bypass opening and closing means (16) as the hot air becomes larger. Item 3. The vehicle air conditioner according to Item 1 or 2 . The temperature of the conditioned air is adjusted by mixing the cold air cooled in the cooling heat exchanger (3) and the warm air heated by passing through the heating heat exchanger (4) in the mixing region, Before the warm air passing through the heating heat exchanger (4) on the downstream side of the heating heat exchanger (4) blows conditioned air to the feet of the front seat passenger via the mixing region A turn channel (7, 11) through which the seat foot outlet (13) is guided;
Further, in the vehicle air conditioner provided with a rear seat foot outlet (14) for blowing conditioned air to the feet of the rear seat occupant on the downstream side of the turn channel (7, 11),
One end side communicates with the downstream side of the heating heat exchanger (4) and the upstream side of the turn channel (7, 11), and the other end side is the downstream side of the front seat foot outlet (13), A bypass passage (15) formed to communicate with the rear seat foot outlet (14) and to bypass the turn passages (7, 11);
Bypass opening and closing means (16) for opening and closing the bypass passage (15),
At the time of heating to blow warm air from the front seat foot outlet (13) and the rear seat foot outlet (14), the bypass opening / closing means (16) opens the bypass passage (15), A vehicle air conditioner for blowing a part of the warm air that has passed through the heating heat exchanger (4) through the bypass passage (15) to the rear seat foot outlet (14);
A mixing ratio adjusting door (8) for adjusting the temperature of the conditioned air by adjusting the mixing ratio of the cold air and the hot air;
The mixing ratio by the mixing ratio adjusting door (8) is, the larger the better in warm air, you characterized by being configured to open the bypass passage by the bypass opening and closing means (16) (15) Vehicle air conditioner. A cooling heat exchanger (3) that cools the air passing therethrough and a heating heat exchanger (4) that heats the air that has passed through the cooling heat exchanger (3) are arranged in the vehicle front-rear direction and cooled. The temperature of the conditioned air is adjusted by mixing the cool air passing through the heat exchanger (3) and bypassing the heating heat exchanger (4) with the warm air passing through the heating heat exchanger (4). Configured to adjust,
On the downstream side of the heating heat exchanger (4), the front seat foot outlet (13) extends upward and then downward and blows conditioned air toward the feet of the front seat occupant. A U-turn-like turn channel (7, 11) provided with
In the vehicle air conditioner in which the rear seat foot outlet (14) for blowing the conditioned air to the feet of the rear seat occupant is formed on the downstream side of the turn flow path,
One end side communicates with the downstream side of the heating heat exchanger (4) and the upstream side of the turn channel (7, 11), and the other end side is the downstream side of the front seat foot outlet (13), A bypass passage (15) formed to communicate with the rear seat foot outlet (14) and to bypass the turn passages (7, 11);
Bypass opening and closing means (16) for opening and closing the bypass passage (15),
Wherein the front foot outlet for seat (13) and at the rear seat foot outlet (14) you blowing hot air from a heating, said opening the bypass passage (15) at said bypass switching means (16) The vehicle air conditioner blows a part of the warm air that has passed through the heating heat exchanger (4) through the bypass passage (15) to the rear seat foot outlet (14),
A mixing ratio adjusting door (8) for adjusting the temperature of the conditioned air by adjusting the mixing ratio of the cold air and the hot air;
The mixing ratio by the mixing ratio adjusting door (8) is, the larger the better in warm air, you characterized by being configured to open the bypass passage by the bypass opening and closing means (16) (15) Vehicle air conditioner. Rear seat occupant signal generating means (25) for generating a signal indicating that there is an occupant in the rear seat of the vehicle
When the rear seat occupant signal generation means (25) generates a signal indicating that there is an occupant in the rear seat of the vehicle, the bypass opening / closing means (16) is configured to open the bypass passage (15). The vehicle air conditioner according to any one of claims 1 to 5, wherein the vehicle air conditioner is provided .

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