JP4387434B2 - Air conditioner for automobile - Google Patents

Description

  The present invention provides an automobile equipped with a differential air outlet, a foot air outlet, and a vent air outlet as a temperature-controlled air outlet created by mixing an evaporator and a heater core in a unit case and mixing cold air and warm air The present invention relates to an air conditioning apparatus.

  Conventionally, by providing a cool air bypass passage above the passage through which mixed air mixed with cold air and warm air passes and opening the max cool door, the temperature of the vent outlet is made independent of the temperature of the other air outlets. An automotive air conditioner that can be controlled to a low temperature side is known (for example, see Patent Document 1).

As a conventional automobile air conditioner, the ventilation path of the heater core is divided into three parts in the vertical direction, the central part thereof is communicated with a lower outlet (foot outlet), and both sides are connected with an upper outlet (bent outlet, A device that communicates with a differential blower outlet and independently controls the blowout temperature from the upper blowout port and the blowout temperature from the lower blowout port is known (for example, see Patent Document 2).
JP-A-9-328008 JP 59-109420 A

  However, since the conventional apparatus described in Patent Document 1 is configured to reduce the temperature of the vent outlet by opening the max cool door, if the temperature of the vent outlet is reduced, the air volume and noise are reduced. Both of them increased, and there was a problem that the passengers felt uncomfortable due to the difference in air volume and noise.

  In the conventional apparatus described in Patent Document 2, the ventilation path of the heater core is divided into three parts in the vertical direction, and the three outlet temperatures of the vent outlet, the differential outlet, and the foot outlet are made independent. Therefore, the length of the passage from the heat exchange surface of the heater core to each outlet is the same. Therefore, if the differential passage length and the foot passage length are set to be short in order to maintain the compactness of the apparatus, the vent passage length is also shortened at the same time, resulting in poor air mixing. On the other hand, if the vent passage length is set long in consideration of the air mixing property, there is a problem that the differential passage and the foot passage become long, resulting in an increase in the size of the apparatus.

  The present invention has been made paying attention to the above-mentioned problem, and independently controls the temperature of each outlet according to various requirements while achieving both compactness of the apparatus and ensuring airmicity in the vent passage. An object of the present invention is to provide an automotive air conditioner that can perform the above-described operation.

In order to achieve the above object, according to the present invention, an evaporator and a heater core are disposed in a unit case, and a temperature-controlled air is created by mixing the cool air passing through the evaporator and the warm air passing through the heater core. In an air conditioner for automobiles equipped with a differential outlet, a foot outlet, and a vent outlet as a wind outlet,
Inside the unit case, a heat exchange surface dividing line that divides the heat exchange surface of the vertically placed heater core into an upper region and a lower region, and each of the air outlets at the upper part of the case is a differential / foot air outlet region and a vent air outlet region. A passage partition wall that smoothly connects the outlet dividing line and the upper passage divided by the passage partition wall is further divided into a differential passage and a foot passage.
A lower passage divided by the passage horizontal partition wall is used as a vent passage, and a mix door and a cold air bypass passage are set in each of the differential passage, the foot passage, and the vent passage.

Therefore, in the automotive air conditioner of the present invention, the upper passage of the passage partition wall is divided into the differential passage and the foot passage by the passage partition wall and the passage partition wall set inside the unit case. The lower passage is a vent passage. And by setting a mix door and a cold air bypass passage in each, temperature is controlled independently about three passages, a differential passage, a foot passage, and a vent passage.
That is, comparing the lengths of the differential passage, the foot passage, and the vent passage that smoothly connect from the vertically placed heater core to the air outlets at the top of the case, the three passages have an arc shape, and therefore the upper passage in which the arc radius is shortened. The side differential passage length and foot passage length are shortened, and the vent passage length of the lower passage where the arc radius is long is lengthened. As a result, it is possible to achieve both compactness of the apparatus and securing of airmicity in the vent passage.
In addition, there are various demands for air conditioning performance by manufacturers and users, and there is a demand for realization of hardware (device) that can meet various demands only by changing software. On the other hand, by adopting a configuration in which the temperature is controlled independently for the three passages, it is possible to independently control the temperature of each outlet according to various requirements.
As a result, it is possible to independently control the temperature of each outlet according to a wide variety of requirements while achieving both compactness of the device and ensuring airmicity in the vent passage.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for realizing an automotive air conditioner of the present invention will be described below based on Example 1 and Example 2 shown in the drawings.

First, the configuration will be described.
FIG. 1 is a plan view showing an automotive air conditioner using front and rear independent air conditioning according to a first embodiment. FIG. 2 is a longitudinal front view taken along line AA of FIG. 3 is a longitudinal side view taken along line B-B in FIG. 2, showing a foot passage in the automotive air conditioner of Example 1. FIG. 4 is a longitudinal side view taken along the line CC of FIG. 2 showing a differential passage in the automotive air conditioner of the first embodiment. FIG. 5 is a longitudinal side view taken along line DD of FIG. 2 showing a rear passage in the automotive air conditioner of the first embodiment. FIG. 6 is a diagram illustrating passage distribution at the heater core setting position in the automotive air conditioner of the first embodiment. FIG. 7 is a hot water flow diagram for the heater core in the automotive air conditioner of the first embodiment, where (a) shows a general hot water flow, and (b) shows a reverse flow of hot water in the first embodiment.

  As shown in FIGS. 1 to 5, the automotive air conditioner of Embodiment 1 includes a unit case 1, an evaporator 2, a heater core 3, left and right differential outlets 4 </ b> L and 4 </ b> R, and left and right foot outlets 5 </ b> L. , 5R, left and right vent outlets 6L, 6R, rear outlet 25, passage horizontal partition walls 7L, 7R, passage vertical partition walls 26L, 26R, rear passage vertical partition walls 27L, 27R, and foot passage 28L, 28R, differential passages 8L, 8R, vent passages 9L, 9R, and a rear passage 29 are provided.

  As shown in FIG. 3, the foot passages 28L and 28R include a foot passage cold air mix door 30, a foot passage warm air mix door 31, a foot passage cold air bypass passage 32, and a foot passage air mix space. 33.

  As shown in FIG. 4, the differential passages 8L and 8R include a differential passage cool air mix door 10, a differential passage warm air mix door 11, a differential passage cold air bypass passage 12, and a differential passage side air mix space. 13.

  As shown in FIGS. 3 and 4, the vent passages 9L and 9R include a vent passage cool air mix door 14, a vent passage warm air mix door 15, a vent passage cold air bypass passage 16, and a vent passage side. An air mix space 17.

  As shown in FIG. 5, the rear passage 29 includes a rear passage cold air mix door 34, a rear passage warm air mix door 35, a rear passage cold air bypass passage 36, and a rear passage air mix space 37. Have.

  As shown in FIGS. 3 and 4, the passage horizontal partition walls 7 </ b> L and 7 </ b> R have a vent-diff / foot communication door 18 and a full cool door 19. The passage vertical partition walls 26L and 26R have foot / diff communication doors 38L and 38R as shown in FIG. As shown in FIG. 5, one of the rear passage horizontal partition walls 39 and 40, which extends the upper and lower openings of the rear passage vertical partition walls 27L and 27R toward the rear side of the vehicle and closes it, It has a vent / rear communication door 41 that opens and closes the opening 39a.

  The left and right differential outlets 4L and 4R have differential doors 20L and 20R as shown in FIG. As shown in FIG. 2, the left and right foot outlets 5L and 5R have foot doors 21L and 21R. As shown in FIG. 1, the left and right vent outlets 6L and 6R have vent doors 22L and 22R. The rear outlet 25 has a rear vent door 42 and a rear foot door 43 as shown in FIG.

  The air conditioner for an automobile according to the first embodiment arranges an evaporator 2 and a heater core 3 in a unit case 1 and mixes the cool air passing through the evaporator 2 and the warm air passing through the heater core 3 to regulate temperature. produce. And as a temperature-controlled air outlet, left and right differential outlets 4L and 4R, left and right foot outlets 5L and 5R, left and right vent outlets 6L and 6R, and a rear outlet 25 are provided. .

  The evaporator 2 is a heat exchanger that is arranged at an upstream position in the unit case 1 and removes heat from wind sent from a blower unit (not shown) to produce cold air. In the evaporator 2, a refrigerant circulating in the in-vehicle refrigeration cycle flows.

  The heater core 3 is a heat exchanger that is disposed in the unit case 1 at a position downstream of the evaporator 2 and heats the wind that has passed through the evaporator 2 to produce warm air. Engine cooling water (warm water) is circulated through the heater core 3.

FIG. 7 is a hot water flow diagram for the heater core in the automotive air conditioner of the first embodiment, where (a) shows a general hot water flow, and (b) shows a reverse flow of hot water in the first embodiment.
In general, as shown in FIG. 7 (a), when the heater core is divided into a lower right region (1), a lower left region (2), an upper left region (3), and an upper right region (4), 1) → (2) → (3) → (4).
On the other hand, as shown in FIG. 7B, the heater core 3 of Example 1 has the heat exchange surfaces at the lower right region (1), the lower left region (2), the upper left region (3), and the upper right region (4). When it is divided, the warm water is discharged from (4) → (3) → (2) → (1). That is, the heater core 3 is configured to introduce hot water before heat exchange from the upper region of the heat exchange surface and discharge hot water after heat exchange from the lower region of the heat exchange surface.

As shown in FIGS. 2 and 4, the passage horizontal partition walls 7 </ b> L and 7 </ b> R are divided into heat exchange surfaces that divide the heat exchange surface of the vertically placed heater core 3 into an upper region and a lower region inside the unit case 1. The line and the air outlet 4L, 4R, 5L, 5R, 6L, 6R in the upper part of the case are set to smoothly connect the air outlet dividing line dividing the differential / foot air outlet area and the vent air outlet area. Then, as shown in FIG. 2, passage vertical partition walls 26L and 26R are set to further divide the upper passage divided by the passage horizontal partition walls 7L and 7R into differential passages 8L and 8R and foot passages 28L and 28R. .
That is, the upper passage divided by the passage horizontal partition walls 7L and 7R is divided into the differential passages 8L and 8R and the foot passages 28L and 28R, and the lower passage divided by the passage horizontal partition walls 7L and 7R is changed to the vent passage 9L, 9R.

  In the foot passages 28L and 28R, a differential passage cold air mix door 30, a differential passage warm air mix door 31, a differential passage cold air bypass passage 32, and a differential passage side air mix space 33 are set. (Fig. 3). In the differential passages 8L and 8R, a cold passage mix door 10 for the differential passage, a warm air mix door 11 for the differential passage, a cold air bypass passage 12 for the differential passage, and a differential passage side air mix space 13 are set. (Fig. 4). In the vent passages 9L and 9R, a vent passage cool air mix door 14, a vent passage warm air mix door 15, a vent passage cold air bypass passage 16, and a vent passage air mix space 17 are set. (FIGS. 3 and 4).

  As shown in FIGS. 3 and 4, the passage horizontal partition walls 7 </ b> L and 7 </ b> R have a first opening 7 a in which a vent-diff / foot communication door 18 is set. The vent-def / foot communication door 18 is opened when temperature-controlled air is blown out only from the vent outlets 6L, 6R, or when temperature-controlled air is not blown out from the vent outlets 6L, 6R. The differential passages 8L and 8R, the foot passages 28L and 28R and the vent passages 9L and 9R are communicated with each other at a position immediately after the heater core 3.

  As shown in FIGS. 3 and 4, the passage horizontal partition walls 7 </ b> L and 7 </ b> R have a second opening 7 b in which a full cool door 19 is set. The full cool door 19 is opened when the cool air blows out only from the vent outlets 6L and 6R, and the differential passages 8L and 8R, the foot passages 28L and 28R and the vent passages 9L and 9R are Communicating at a streamline extended position from the passage-side cold air bypass passage 12 and the foot passage-side cold air bypass passage 32.

  As shown in FIG. 2, the passage vertical partition walls 26L and 26R have third openings 26a and 26a in which foot / diff communication doors 38L and 38R are set. The foot / differential communication doors 38L, 38R are opened when the foot mode or the differential mode is selected and there is a request to increase the air volume, and the differential passages 8L, 8R and the foot passages 28L, 28R are communicated. .

FIG. 6 is a diagram illustrating passage distribution at the heater core setting position in the automotive air conditioner of the first embodiment.
In the first embodiment, rear passage vertical partition walls 27 </ b> L and 27 </ b> R that divide a central region passing through the upper and lower sides of the heat exchange surface of the heater core 3 as a rear passage 29 are set. Accordingly, as shown in FIG. 6, the heat exchange surface of the heater core 3 distributes the left and right regions of the rear passage 29 to the vent passages 9L and 9R, the differential passages 8L and 8R, and the foot passages 28L and 28R, respectively. Is divided into 7 parts.

Next, the operation will be described.
The effects of the air conditioner for an automobile according to the first embodiment are as follows: “wind flow action during temperature control (full hot) with the vent mode selected”, “wind flow action during full cool with the vent mode selected” ”,“ Wind flow action when selecting a combined mode including a vent ”, and“ wind flow action when selecting a mode that is not blown out by a vent ”.

[Wind flow action during temperature control (full hot) with vent mode selected]
FIG. 8 is an operation explanatory diagram illustrating the wind flow operation during temperature control with the vent mode selected in the automotive air conditioner of the first embodiment.

  At the time of temperature control with the vent mode selected, the differential doors 20L, 20R and the foot doors 21L, 21R are closed, and the vent doors 22L, 22R are opened. Then, the vent-diff / foot communication door 18 is opened, and the full cool door 19 and the foot / diff communication doors 38L and 38R are closed. Furthermore, the opening degree of the differential passage cold air mix door 10 and the differential passage warm air mix door 11 on the side of the differential passages 8L and 8R is controlled according to the set temperature of the occupant. The opening degree of the foot passage cold air mix door 30 and the foot passage warm air mix door 31 on the side of the foot passages 28L and 28R is controlled according to the set temperature of the occupant. Further, the opening degree of the vent passage cold air mix door 14 and the vent passage warm air mix door 15 on the vent passages 9L and 9R side is controlled according to the set temperature of the occupant.

  Therefore, on the side of the differential passages 8L and 8R and the foot passages 28L and 28R, as shown in FIG. 8, the cold air passing through the cold passage bypass passage 12 for the differential passage and the cold air bypass passage 32 for the foot passage and the upper region of the heater core 3 The passing warm air passes through the first openings 7a of the passage horizontal partition walls 7L and 7R and is guided to the vent passages 9L and 9R. On the vent passages 9L and 9R side, the cold air passing through the vent passage cold air bypass passage 16, the warm air passing through the lower region of the heater core 3, the differential passages 8L and 8R, and the foot passages 28L and 28R are introduced. Cold air and warm air are mixed in the vent passage side air mix space 17. And the temperature control air by mixing cold air and warm air passes through the vent passages 9L and 9R and is blown out from the vent outlets 6L and 6R.

  During full hot with the vent mode selected, the differential doors 20L and 20R and the foot doors 21L and 21R are closed, and the vent doors 22L and 22R are opened. Then, the vent-diff / foot communication door 18 is opened, and the full cool door 19 and the foot / diff communication doors 38L and 38R are closed. Further, the differential passage cool air mix door 10 and the foot passage cool air mix door 30 are closed, and the differential passage warm air mix door 11 and the foot passage warm air mix door 31 are opened. Further, the vent passage cool air mix door 14 on the vent passages 9L, 9R side is closed, and the vent passage warm air mix door 15 is opened.

  Therefore, on the differential passages 8L, 8R and the foot passages 28L, 28R side, as shown in FIG. 8, the warm air passing through the upper region of the heater core 3 passes through the first openings 7a of the passage horizontal partition walls 7L, 7R. Then, it is guided to the vent passage 9 side. On the vent passages 9L, 9R side, the warm air passing through the lower region of the heater core 3 and the warm air introduced from the differential passages 8L, 8R and the foot passages 28L, 28R are mixed in the vent passage air mix space 17. The And the warm air by mixing passes through vent passage 9L, 9R, and is blown off from vent blower outlet 6L, 6R.

  As described above, at the time of temperature control with the vent mode selected, the vent blowing temperature can be independently adjusted, for example, to about 0 ° C. to + 70 ° C. (during full hot). In addition, at the time of temperature control with the vent mode selected, the vent-diff / foot communication door 18 is opened, and the cool air and the warm air in the differential passages 8L, 8R and the foot passages 28L, 28R are sent to the vent passages 9L, 9R. Since the structure is introduced, the air volume can be increased and the air mix can be improved by the crossing of the wind as compared with the case where the temperature control is performed only on the vent passages 9L and 9R side.

[Wind flow action at full cool with vent mode selected]
FIG. 9 is an operation explanatory diagram illustrating a wind flow operation during a full cool with the vent mode selected in the automotive air conditioner of the first embodiment.

  At the time of full cool with the vent mode selected, the differential doors 20L, 20R and the foot doors 21L, 21R are closed, and the vent doors 22L, 22R are opened. Then, the vent-diff / foot communication door 18 and the foot / diff communication doors 38L, 38R are closed, and the full cool door 19 is opened. Further, the differential passage cool air mix door 10 on the differential passages 8L, 8R side is opened, and the differential passage warm air mix door 11 is closed. The cold air mix door 30 for foot passages on the side of the foot passages 28L and 28R is opened, and the warm air mix door 31 for foot passages is closed. Further, the vent passage cool air mix door 14 on the vent passages 9L, 9R side is opened, and the vent passage warm air mix door 15 is closed.

  Therefore, on the side of the differential passages 8L, 8R and the foot passages 28L, 28R, as shown in FIG. 9, the cool air that has passed through the evaporator 2 passes through the second openings 7b of the passage horizontal partition walls 7L, 7R, and the vent passage Guided to the 9L and 9R sides. On the vent passages 9L and 9R side, the cool air that has passed through the evaporator 2 passes through the vent passages 9L and 9R, and from the vent air outlets 6L and 6R together with the cold air introduced from the differential passages 8L and 8R and the foot passages 28L and 28R. Blown out.

  As described above, the vent blow temperature can be adjusted to, for example, about −5 ° C. for a full cool by selecting the vent mode. In addition, at the time of a full cool when the vent mode is selected, the full cool door 19 is opened, and the cool air in the differential passages 8L, 8R and the foot passages 28L, 28R is sent to the vent passages 9L, 9R immediately before the vent outlets 6L, 6R. Therefore, the air volume can be increased as compared with the case where the temperature control is performed only on the vent passages 9L and 9R side. Furthermore, compared with the case where it communicates via the vent-diff / foot communication door 18, the moving distance of cold air becomes short, ventilation resistance can be reduced, and noise reduction can be achieved with reduction of ventilation resistance. it can.

[Wind flow action when combined mode including vent is selected]
FIG. 10 is an operation explanatory diagram illustrating the wind flow operation when the combined mode including the vent is selected in the automotive air conditioner of the first embodiment.

  When a combined mode including a vent mode (bent / foot mode, vent / def mode, vent / diff / foot mode) is selected, at least one of the differential doors 20L and 20R and the foot doors 21L and 21R is opened, and the vent doors 22L and 22R are opened. It is opened. The vent-diff / foot communication door 18, the full cool door 19, and the foot / diff communication doors 38L, 38R are all closed. Furthermore, the opening degree of the differential passage cold air mix door 10 and the differential passage warm air mix door 11 on the side of the differential passages 8L and 8R is controlled according to the set temperature of the occupant. The opening degree of the foot passage cold air mix door 30 and the foot passage warm air mix door 31 on the side of the foot passages 28L and 28R is controlled according to the set temperature of the occupant. Further, the opening degree of the vent passage cold air mix door 14 and the vent passage warm air mix door 15 on the side of the vent passage 9 is controlled according to the set temperature of the occupant.

  Therefore, on the differential passages 8L and 8R side, as shown in FIG. 10, the cold air passing through the cold passage bypass passage 12 for the differential passage and the warm air passing through the upper region of the heater core 3 are in the differential passage side air mix space 13. Mixed. And the temperature control air by mixing cold air and warm air passes through the differential passages 8L and 8R and is blown out from the differential outlets 4L and 4R.

  On the foot passages 28 </ b> L and 28 </ b> R side, the cold air passing through the foot passage cold air bypass passage 32 and the warm air passing through the upper region of the heater core 3 are mixed in the foot passage side air mix space 33. And the temperature control air by mixing cold air and warm air passes through the foot passages 28L and 28R and is blown out from the foot outlets 5L and 5R.

  On the other hand, on the vent passages 9 </ b> L and 9 </ b> R side, the cold air passing through the vent passage cold air bypass passage 16 and the warm air passing through the lower region of the heater core 3 are mixed in the vent passage air mix space 17. And the temperature control air by mixing cold air and warm air passes through the vent passages 9L and 9R and is blown out from the vent outlets 6L and 6R.

  As described above, when the combined mode including the vent mode is selected, the temperature of each of the three passages of the differential passages 8L and 8R, the foot passages 28L and 28R, and the vent passages 9L and 9R can be adjusted independently.

  The lengths of the differential passages 8L and 8R, the foot passages 28L and 28R, and the vent passages 9L and 9R that smoothly connect the vertical heater core 3 to the outlets 4L, 4R, 5L, 5R, 6L, and 6R in the upper part of the case. Since all the passages are arcuate, both the differential passage length and the foot passage length of the upper passage in which the arc radius is shortened are shortened, and the vent passage length of the lower passage in which the arc radius is increased. Accordingly, the airmic property in the vent passages 9L and 9R can be ensured when the composite mode including the vent mode is selected while the apparatus is made compact.

[Wind flow action when mode not blown out by vent]
FIG. 11 is an operation explanatory diagram illustrating a wind flow operation when a mode that is not blown out by a vent in the automotive air conditioner of the first embodiment is selected.

  When the differential / foot mode not blown to the vent is selected, the differential doors 20L, 20R and the foot doors 21L, 21R are opened, and the vent doors 22L, 22R are closed. Then, the vent-diff / foot communication door 18 is opened, and the full cool door 19 and the foot / diff communication doors 38L and 38R are closed. Furthermore, the opening degree of the differential passage cold air mix door 10 and the differential passage warm air mix door 11 on the side of the differential passages 8L and 8R is controlled according to the set temperature of the occupant. The opening degree of the foot passage cold air mix door 30 and the foot passage warm air mix door 31 on the side of the foot passages 28L and 28R is controlled according to the set temperature of the occupant. Further, the opening degree of the vent passage cold air mix door 14 and the vent passage warm air mix door 15 on the side of the vent passage 9 is controlled according to the set temperature of the occupant.

  Therefore, on the vent passages 9L and 9R side, as shown in FIG. 11, the cool air passing through the vent passage cool air bypass passage 16 and the warm air passing through the lower region of the heater core 3 are in the vent passage air mix space 17. Mixed. The temperature-controlled air by mixing the cold air and the warm air passes through the first opening 7a of the passage horizontal partition wall 7 and is guided to the differential passages 8L and 8R and the foot passages 28L and 28R.

  On the differential passages 8L, 8R side, as shown in FIG. 11, the cold air passing through the cold passage bypass passage 12 for the differential passage, the warm air passing through the upper region of the heater core 3, and the vent passages 9L, 9R are introduced. The mixed air is mixed in the differential passage side air mix space 13. The mixed temperature-controlled air passes through the differential passages 8L and 8R and is blown out from the differential outlets 4L and 4R.

  On the other hand, on the foot passages 28L, 28R side, the cool air passing through the foot passage cold air bypass passage 32, the warm air passing through the upper region of the heater core 3, and the mixed air introduced from the vent passages 9L, 9R are on the foot passage side. Mixing is performed in the air mix space 33. The mixed temperature-controlled air passes through the foot passages 28L and 28R and is blown out from the foot outlets 5L and 5R.

  When the differential mode or the foot mode that is not blown out to the vent is selected, one of the differential doors 20L, 20R and the foot doors 21L, 21R is opened, and the vent doors 22L, 22R are closed. Then, both the vent-diff / foot communication door 18 and the foot / diff communication doors 38L and 38R are opened, and the full cool door 19 is closed. Furthermore, the opening degree of the differential passage cold air mix door 10 and the differential passage warm air mix door 11 on the side of the differential passages 8L and 8R is controlled according to the set temperature of the occupant. The opening degree of the foot passage cold air mix door 30 and the foot passage warm air mix door 31 on the side of the foot passages 28L and 28R is controlled according to the set temperature of the occupant. Further, the opening degree of the vent passage cold air mix door 14 and the vent passage warm air mix door 15 on the side of the vent passage 9 is controlled according to the set temperature of the occupant.

  Therefore, on the vent passages 9L and 9R side, as shown in FIG. 11, the cool air passing through the vent passage cool air bypass passage 16 and the warm air passing through the lower region of the heater core 3 are in the vent passage air mix space 17. Mixed. The temperature-controlled air by mixing the cold air and the warm air passes through the first opening 7a of the passage horizontal partition wall 7 and is guided to the differential passages 8L and 8R and the foot passages 28L and 28R.

  When the differential mode is selected, on the side of the differential passages 8L and 8R, as shown in FIG. 11, cold air passing through the cold passage bypass passage 12 for the differential passage, warm air passing through the upper region of the heater core 3, and the vent passage 9L , 9R and the mixed air introduced from the foot passages 28L, 28R by opening the foot / diff communication doors 38L, 38R are mixed in the differential passage side air mix space 13. The mixed temperature-controlled air passes through the differential passages 8L and 8R and is blown out from the differential outlets 4L and 4R.

  On the other hand, when the foot mode is selected, on the side of the foot passages 28L and 28R, the cold air passing through the foot passage cold air bypass passage 32, the warm air passing through the upper region of the heater core 3, and the vent passages 9L and 9R are introduced. The mixed air and the mixed air introduced from the differential passages 8L and 8R by opening the foot / diff communication doors 38L and 38R are mixed in the foot passage-side air mix space 33. The mixed temperature-controlled air passes through the foot passages 28L and 28R and is blown out from the foot outlets 5L and 5R.

  As described above, when the differential / foot mode not blown out to the vent is selected, the vent-diff / foot communication door 18 is opened, and the mixed air in the vent passages 9L, 9R is supplied to the differential passages 8L, 8R and the foot passages 28L, 28R. Therefore, compared to the case where the temperature control is performed only on the side of the differential passages 8L and 8R and the foot passages 28L and 28R, the air volume can be increased, and the air mixing can be improved by the crossing of the wind. it can.

  Further, when the differential mode or the foot mode not blown out to the vent is selected, the vent-diff / foot communication door 18 is opened, and the mixed air in the vent passages 9L and 9R is introduced into the differential passages 8L and 8R and the foot passages 28L and 28R. At the same time, since the foot / diff communication doors 38L and 38R are opened and mixed air is introduced from the adjacent differential passages 8L and 8R or the foot passages 28L and 28R, only the differential passages 8L and 8R and only the foot passages 28L and 28R are provided. Compared with the case where the temperature control is performed with the air flow, the air volume can be greatly increased. At this time, the vent-diff / foot communication door 18 may be closed to increase the air volume only between the adjacent differential passages 8L, 8R and the foot passages 28L, 28R.

Specific advantages of the automotive air conditioner of Example 1 are listed below.
-When the window mode is fogged when the vent mode is selected, the temperature of the differential wind can be raised, and the window fog can be cleared without changing the temperature of the vent wind.
-When the def / foot mode is selected, window fogging can be removed without changing the foot wind temperature, such as when window fogging occurs.
-When the head feels hazey, the temperature can be adjusted independently only for the differential wind.
-When the foot is cold, the temperature of the foot wind can be adjusted independently without changing the temperature of the vent wind.
-When the upper body is hot, the temperature can be adjusted independently for the vent air without changing the temperature of the foot air.
・ When window fogging occurs, high temperature can be set independently only for differential wind to quickly remove window fogging.
・ When the upper body feels hot, only the vent air can be set to a lower temperature independently.
・ It can be set to each blowing temperature of the passenger's preference.

Next, the effect will be described.
In the automotive air conditioner of Embodiment 1, the effects listed below can be obtained.

  (1) The evaporator 2 and the heater core 3 are arranged in the unit case 1, and the temperature-controlled air is created by mixing the cool air passing through the evaporator 2 and the warm air passing through the heater core 3. In an automotive air conditioner equipped with differential outlets 4L, 4R, foot outlets 5L, 5R, and vent outlets 6L, 6R as outlets, heat exchange of the heater core 3 placed vertically in the unit case 1 A heat exchange surface dividing line that divides the surface into an upper region and a lower region, and an outlet that divides each of the outlets 4L, 4R, 5L, 5R, 6L, and 6R in the upper part of the case into a differential / foot outlet region and a vent outlet region The passage lateral partition walls 7L and 7R that smoothly connect the dividing line are set, and the upper passage divided by the passage lateral partition walls 7L and 7R is further divided into differential passages 8L and 8R. The passage vertical partition walls 26L and 26R divided into the foot passages 28L and 28R are set, the lower passages divided by the passage horizontal partition walls 7L and 7R are the vent passages 9L and 9R, and the differential passages 8L and 8R Since the mix doors 10, 11, 30, 31, 14, and 15 and the cold air bypass passages 12, 32, and 16 are set in the foot passages 28L and 28R and the vent passages 9L and 9R, respectively, the apparatus can be made compact and the vent passage 9L. , 9R temperature control of each air outlet (Differential outlet 4L, 4R, Foot outlet 5L, 5R, Vent outlet 6L, 6R) according to various requirements can do.

  (2) The passage horizontal partition walls 7L and 7R have a first opening 7a in which a vent-diff / foot communication door 18 is set, and the vent-def / foot communication door 18 has the vent outlet 6L. , 6R, or when the temperature adjustment air is not blown out from the vent outlets 6L, 6R, the door is opened, and the differential passages 8L, 8R, the foot passages 28L, 28R and the vent passage 9L are opened. , 9R communicate with each other immediately after the heater core 3, so that the temperature control is performed only on the differential passages 8L, 8R and the foot passages 28L, 28R, or the temperature control is performed only on the vent passages 9L, 9R. Compared to the case, the air volume can be increased by the inflow of wind through the first opening 7a, and the air mix can be improved by the cross of the wind.

  (3) The passage horizontal partition walls 7L and 7R have a second opening 7b in which a full cool door 19 is set. The full cool door 19 is a full blown out cool air from only the vent outlets 6L and 6R. When the door is open, the differential passages 8L and 8R, the foot passages 28L and 28R, and the vent passages 9L and 9R are placed at the streamline extended positions from the differential passage side cold air bypass passage 12 and the foot passage side cold air bypass passage 32. As a result, the air flow can be increased and the vent-diff / foot communication door 18 can be increased at the time of full cooling when the vent mode is selected, as compared with the case where the temperature control is performed only on the vent passages 9L and 9R. Compared with the case where it communicates via, the movement distance of cold wind becomes short, ventilation resistance can be reduced, and noise reduction can be achieved with reduction of ventilation resistance.

  (4) The passage vertical partition walls 26L and 26R have third openings 26a and 26a in which foot / diff communicating doors 38L and 38R are set, and the foot / diff communicating doors 38L and 38R are in foot mode or When the differential mode is selected and the air volume increase request is made, the door is opened and the differential passages 8L and 8R are connected to the foot passages 28L and 28R. Therefore, when the foot mode or the differential mode is selected, the air volume of the temperature-controlled air increases. Can be achieved.

  (5) Of the heat exchange surfaces of the heater core 3, rear passage vertical partition walls 27 </ b> L and 27 </ b> R are set to divide a central region passing through up and down as a rear passage 29, and the heat exchange surface of the heater core 3 serves as the rear passage 29. In order to distribute the left and right regions to the vent passages 9L and 9R, the differential passages 8L and 8R, and the foot passages 28L and 28R, respectively, there are three differential outlets 4L and 4R, foot outlets 5L and 5R, and vent outlets 6L and 6R. The temperature of the air outlets can be independently controlled for the left and right sides, and the temperature of the four air outlets including the rear air outlet 25 can be independently controlled.

  (6) The heater core 3 is configured to introduce hot water before heat exchange from the upper region of the heat exchange surface and discharge hot water after heat exchange from the lower region of the heat exchange surface. When the system mode is selected, a sufficient amount of exchange heat can be secured to create a warm air with high temperature.

  Example 2 is an example in which, in addition to the automotive air conditioner of Example 1, an auxiliary heater that warms the wind passing through the heater core is set immediately after the heat exchange surface of the heater core when auxiliary heating is required.

First, the configuration will be described.
FIG. 12 is a longitudinal side view showing the automotive air conditioner of the second embodiment.

  As shown in FIG. 12, the automotive air conditioner of the second embodiment includes a unit case 1, an evaporator 2, a heater core 3, left and right differential outlets 4L and 4R, and left and right foot outlets 5L and 5R. The left and right vent outlets 6L and 6R, the passage lateral partition walls 7L and 7R, the differential passages 8L and 8R, and the vent passages 9L and 9R are provided.

  The differential passages 8 </ b> L and 8 </ b> R include a differential passage cold air mix door 10, a differential passage warm air mix door 11, a differential passage cold air bypass passage 12, and a differential passage side air mix space 13.

  The vent passages 9L and 9R include a vent passage cool air mix door 14, a vent passage warm air mix door 15, a vent passage cold air bypass passage 16, and a vent passage air mix space 17.

  The passage horizontal partition walls 7 </ b> L and 7 </ b> R have a vent-diff / foot communication door 18 and a full cool door 19. The left and right differential outlets 4L, 4R have differential doors 20L, 20R, the left and right foot outlets 5L, 5R have foot doors 21L, 21R, and the left and right vent outlets 6L, 6R has vent doors 22L and 22R.

  As shown in FIG. 12, the heater core 3 has a position immediately after the heat exchanging surface, in the upper region that leads to the differential passages 8L and 8R and the foot passages 28L and 28R (not shown) when auxiliary heating is required (for example, The PTC heater core 24 (auxiliary heater) that warms the wind passing through the heater core 3 is set when the hot water supply is stopped, immediately after the engine is started, or when the low water temperature system auxiliary heating is used for a diesel engine vehicle or a gasoline engine vehicle. Here, PTC (abbreviation of Positive Temperature Coefficient) is a positive temperature coefficient, and the PTC heater core 24 incorporates a PTC heater, which is an electrical planar heating element, in a heat exchanger having fins or the like. It has a structure. Since other configurations are the same as those in the first embodiment, the description thereof is omitted.

Next, the operation will be described.
The “auxiliary heating operation” will be described as an operation in the automotive air conditioner of the second embodiment. In addition, “wind flow action at the time of temperature control (full hot) with vent mode selected”, “wind flow action at full cool with vent mode selected”, “when combined mode including vent is selected” Since the actions of “wind flow action” and “wind flow action when a mode not blown to the vent is selected” are the same as those in the first embodiment, description thereof will be omitted.

[Auxiliary heating function]
For example, when the hot water supply is stopped, immediately after the engine is started, or when the low water temperature system auxiliary heating is used for a diesel engine vehicle or a gasoline engine vehicle, the differential doors 20L and 20R and the foot doors 21L and 21R are opened, and the vent doors 22L and 22R are closed. It is said. Then, both the vent-diff / foot communication door 18 and the full cool door 19 are closed. Further, the differential passage cool air mix door 10 on the differential passages 8L, 8R side is closed, and the differential passage warm air mix door 11 is opened. The foot passage cold air mix door 30 on the side of the foot passages 28L, 28R is closed, and the foot passage warm air mix door 31 is opened. The vent passage cold air mix door 14 and the vent passage warm air mix door 15 on the vent passages 9L and 9R side are both closed. In this state, the PTC heater core 24 is energized.

  Accordingly, on the side of the differential passages 8L, 8R and the foot passages 28L, 28R, as shown in FIG. 12, warm air is created through the upper region of the heater core 3 and the PTC heater core 24, and this warm air is , 8R and the foot passages 28L, 28R, and are blown out from the differential outlets 4L, 4R and the foot outlets 5L, 5R.

  For example, when the engine is stopped in a heating operation state in winter or the like, the temperature of engine cooling water (hot water) supplied to the heater core 3 is lowered, and vehicle interior heating becomes ineffective. As described above, the situation in which the vehicle interior heating temporarily becomes ineffective is, in particular, an idle stop vehicle that stops the engine when the signal is stopped, or a hybrid vehicle that stops the engine when the battery capacity is sufficient, etc. Can be seen well.

  On the other hand, as described above, when the engine is stopped in the heating operation state, warm air is created by the PTC heater core 24, and this warm air is blown out from the differential air outlets 4L, 4R and the foot air outlets 5L, 5R. That is, by using only the differential passages 8L and 8R and the foot passages 28L and 28R, it is possible to efficiently assist heating in the vehicle interior while minimizing heat loss.

  Similarly, immediately after the engine is started when the temperature of the engine coolant supplied to the heater core 3 is at the outside air temperature level, warm air can be generated by the PTC heater core 24 to assist in heating the vehicle interior. Furthermore, in the low water temperature system of a diesel engine vehicle or a gasoline engine vehicle, when the warm air does not reach a desired temperature, the warm air temperature can be increased by the PTC heater core 24 and the vehicle interior heating can be assisted.

Next, the effect will be described.
In the automotive air conditioner of the second embodiment, in addition to the effects (1) to (6) of the first embodiment, the following effects can be obtained.

  (7) Of the position immediately after the heat exchange surface of the heater core 3, the air passing through the heater core 3 is warmed to the upper region portion leading to the differential passages 8L and 8R and the foot passages 28L and 28R when auxiliary heating is required. Since the PTC heater core 24 is set, the vehicle interior heating can be efficiently assisted while minimizing heat loss.

  As mentioned above, although the air conditioning apparatus for motor vehicles of this invention has been demonstrated based on Example 1 and Example 2, it is not restricted to these Examples about a concrete structure, Each claim of a claim Design changes and additions are permitted without departing from the spirit of the invention according to the paragraph.

  In Examples 1 and 2, a preferable example in which a vent-diff / foot communication door and a full cool door are set in the passage horizontal partition wall is shown. However, one of the vent-diff / foot communication door and the full cool door may be omitted, or both the vent-diff / foot communication door and the full cool door may be omitted. .

  In the first and second embodiments, the foot / diff communication door is set on the passage vertical partition wall. However, the foot / diff communication door may be omitted.

  In Example 2, although the example using the PTC heater core was shown as an auxiliary heater, for example, the auxiliary heater core that supplies the prewarm water stored in the heat accumulator when the engine is stopped, or other on-vehicle heat source is used. It may be a heater.

  In short, inside the unit case, the heat exchange surface dividing line that divides the heat exchange surface of the vertically placed heater core into an upper region and a lower region, and each outlet at the upper part of the case into a differential / foot outlet region and a vent outlet region In addition to setting the passage partition wall that smoothly connects the outlet dividing line, the upper passage divided by the passage partition wall is further divided into a differential passage and a foot passage, and a passage vertical partition wall is set. As long as the lower passage divided by the partition wall is a vent passage, and a mix door and a cold air bypass passage are set in each of the differential passage, the foot passage and the vent passage, it is limited to the first and second embodiments. There is no.

  In the first and second embodiments, an example of application to an air conditioner for an automobile that performs front and rear air conditioning of an automobile having a rear passage has been shown. can do. In short, an air conditioner for an automobile equipped with a differential air outlet, a foot air outlet, and a vent air outlet as a temperature-controlled air outlet created by mixing an evaporator and a heater core in the unit case and mixing cold air and warm air If applicable.

It is a top view which shows the air conditioning apparatus for motor vehicles by front and rear seat independent air conditioning of Example 1. FIG. It is a vertical front view by the AA line of FIG. 1 which shows the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a vertical side view by the BB line of FIG. 2 which shows the foot passage in the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a vertical side view by the CC line of FIG. 2 which shows the differential path | route in the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a vertical side view by the DD line of FIG. 2 which shows the rear channel | path in the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a figure which shows passage distribution in the setting position of the heater core in the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a warm water flow figure with respect to the heater core in the air conditioning apparatus for motor vehicles of Example 1, (a) shows a general warm water flow, (b) shows the reverse flow of the warm water in Example 1. FIG. It is an effect explanatory view showing the wind flow action at the time of temperature control in which the vent mode is selected in the automobile air conditioner of the first embodiment. It is an effect explanatory view showing a wind flow action at the time of a full cool when the vent mode is selected in the automobile air conditioner of the first embodiment. It is an effect explanatory view showing the wind flow action at the time of compound mode selection including the vent in the air harmony device for cars of Example 1. It is effect | action explanatory drawing which shows the wind flow effect | action at the time of the mode selection which is not blown out by the vent in the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a vertical side view which shows the air conditioning apparatus for motor vehicles of Example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unit case 2 Evaporator 3 Heater core 4L, 4R Left and right differential outlet 5L, 5R Left and right foot outlet 6L, 6R Left and right vent outlet 7L, 7R Passage horizontal partition wall 7a 1st opening 7b 2nd opening 8L, 8R differential passage 9L, 9R vent passage 10 differential passage cold air mix door 11 differential passage warm air mix door 12 differential passage cold air bypass passage 13 differential passage side air mix space 14 vent passage cold air mix door 15 vent passage warm air Mix door 16 Cold air bypass passage for vent passage 17 Vent passage side air mix space 18 Vent-diff / foot communication door 19 Full cool door 20L, 20R Differential door 21L, 21R Foot door 22L, 22R Vent door 24 PTC heater core (auxiliary heater)
25 Rear outlet 26L, 26R Passage vertical partition wall 26a Third opening 27L, 27R Rear passage vertical partition walls 28L, 28R Foot passage 29 Rear passage 30 Foot passage cool air mix door 31 Foot passage warm air mix door 32 Foot passage Cold air bypass passage 33 Foot passage side air mix space 34 Rear passage cold air mix door 35 Rear passage warm air mix door 36 Rear passage cold air bypass passage 37 Rear passage air mix space 38L, 38R Foot / diff communication door 39, 40 Rear passage horizontal partition wall 39a Fourth opening 41 Vent / rear communication door

Claims (7)

An evaporator and a heater core are arranged in the unit case, and a temperature-controlled air is created by mixing the cold air passing through the evaporator and the warm air passing through the heater core. In an automotive air conditioner equipped with an outlet and a vent outlet,
Inside the unit case, a heat exchange surface dividing line that divides the heat exchange surface of the vertically placed heater core into an upper region and a lower region, and each of the air outlets at the upper part of the case is a differential / foot air outlet region and a vent air outlet region. A passage partition wall that smoothly connects the outlet dividing line and the upper passage divided by the passage partition wall is further divided into a differential passage and a foot passage.
A vehicle air characterized in that a lower passage divided by the passage horizontal partition wall is used as a vent passage, and a mix door and a cold air bypass passage are set in each of the differential passage, the foot passage, and the vent passage. Harmony device. In the air conditioning apparatus for motor vehicles described in Claim 1,
The passage partition wall has a first opening with a vent-diff / foot communication door,
The vent-def / foot communication door is opened when temperature-controlled air is blown out only from the vent outlet or when temperature-controlled air is not blown out from the vent outlet, and the differential passage, the foot passage, An automotive air conditioner, wherein a vent passage is communicated at a position immediately after the heater core. The automotive air conditioner according to claim 1 or 2,
The passage partition wall has a second opening with a full cool door,
The full cool door is opened when the cool air is blown out only from the vent outlet, and the differential passage and the foot passage and the vent passage are connected to the differential passage side cold air bypass passage and the foot passage side cold air bypass passage. An automotive air conditioner that communicates at a streamline extension position. In the air conditioning apparatus for motor vehicles described in any one of Claims 1 thru | or 3,
The passage vertical partition wall has a third opening having a foot / diff communicating door,
The automobile air conditioner is characterized in that the foot / diff communication door is opened when the foot mode or the differential mode is selected and there is a request for an increase in air volume, and the differential passage and the foot passage are communicated. In the air conditioning apparatus for motor vehicles described in any one of Claim 1 thru | or 4,
Of the heat exchange surface of the heater core, set a rear passage vertical partition wall that divides a central region penetrating up and down as a rear passage,
The automotive air conditioner is characterized in that the heat exchange surface of the heater core distributes the left and right regions of the rear passage to a vent passage, a differential passage, and a foot passage, respectively. The automotive air conditioner according to any one of claims 1 to 5,
The automotive air conditioner is characterized in that the heater core introduces warm water before heat exchange from an upper region of the heat exchange surface and discharges hot water after heat exchange from a lower region of the heat exchange surface. In the air conditioning apparatus for motor vehicles described in any one of Claims 1 thru | or 6,
Of the position immediately after the heat exchange surface of the heater core, an auxiliary heater that heats the wind passing through the heater core when auxiliary heating is required is set in a portion of the upper region that communicates with the differential passage and the foot passage. Air conditioner for automobiles.

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