JP2011131630A - Vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air conditioner that has excellent dehumidifying performance and can control an air ratio from a defrost blow-off port and a foot blow-off port while reducing a heating load of air conditioning at a low ambient temperature. <P>SOLUTION: The vehicular air conditioner includes a first blowing air duct 60a for carrying inner air in a cabin to the foot blow-off port 15; a first blower 30 for blowing air to the first blowing air duct 60a; a first heating heat exchanger 50a for heating the blowing air of the first blower 30; a second blowing air duct 61a for carrying outside air in the cabin to a defrost blow-off port 16; a second blower 32 for blowing air to the second blowing air duct 61a; a second heating heat exchanger 50b for heating the blowing air of the second blower 32; and a blower control part 35 for controlling a distribution ratio of air blown off from the foot blow-off port 15 and the defrost blow-off port 16 by controlling wind amounts of the first blower 30 and the secure blower 32. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner, and more particularly to a two-layer vehicle air conditioner in which an inside air passage and an outside air passage are partitioned and divided.

  In a vehicle air conditioner, there is a vehicle air conditioner having a two-layer structure that introduces outside air while circulating the inside air to reduce a heating load at a low outside air temperature (see, for example, Patent Document 1). The vehicular air conditioner having a two-layer structure is configured to divide a passage for introducing air into a vehicle compartment into two and install a fan in each of the passages. The two-layer vehicle air conditioner is provided with a defroster (def) blower outlet at an air downstream position of one passage and a foot (foot) blower outlet at an air downstream position of the other passage. With such a two-layer vehicle air conditioner, outside air with relatively low humidity is introduced and heated and blown out from the differential outlet to obtain an anti-fogging effect, and the heating load is reduced by internal air circulation in order to improve the heating capacity. A blowing mode in which the inside air is introduced and heated and blown out from the foot outlet is called a two-layer flow mode.

  The above-described vehicle air conditioner having a two-layer structure described in Patent Document 1 forms a conditioned air passage into an inside air passage through which the inside air is blown and an outside air passage through which the outside air is blown. Establishing the air volume ratio between the inside air and the outside air in the two-layer flow mode has a problem in design.

  Therefore, in order to establish the air volume ratio of the inside air and the outside air that change significantly in the two-layer flow mode, proposals have been made to set the air volume ratio of the foot defroster blowing mode and the foot blowing mode to desired values (for example, , See Patent Document 2). In this proposal, when the maximum heating state is set, the two-layer flow mode in the foot blowing mode is set. In the two-layer flow mode in the foot blowing mode, the conditioned air heated from the outside air not only flows into the defroster outlet, but also passes through the communication passage that connects the inside air passage and the outside air passage to the foot outlet. Has come to flow. In this way, if the conditioned air heated from the outside air also flows into the foot outlet, the original effect of the two-layer flow mode is that the inside air having a low heating load is introduced and heated by the inside air circulation, and is blown out from the foot outlet. There is a problem in that the effect of improving the temperature of the airflow is reduced.

Japanese Patent Laid-Open No. 5-124426 Japanese Patent Laid-Open No. 10-109520

  The present invention has been made in view of the above circumstances, and has an excellent dehumidifying performance while reducing the heating load of air conditioning at low outside air temperature, and controls the air volume ratio from the differential outlet and the foot outlet An object of the present invention is to provide a vehicle air conditioner that can be used.

  According to one aspect of the present invention, the first air passage that communicates the inside air of the vehicle interior to the foot outlet, the first air blower that blows air to the first air passage, and the first air that overheats the air from the first air blower. 1 heating heat exchanger, a second air passage that communicates outside air in the vehicle interior to the differential outlet, a second air blower that blows air to the second air passage, and a second that overheats the air blown by the second air blower A heat exchanger for heating, and a blower controller that controls the air flow ratio of the first blower and the second blower to control the air distribution ratio of the blown air blown from the foot blower outlet and the differential blower outlet. The gist is that the vehicle air conditioner is provided.

  According to the present invention, there is provided a vehicle air conditioner that has excellent dehumidifying performance and can control the air volume ratio from the differential outlet and the foot outlet while reducing the heating load of the air conditioning at a low outside air temperature. Can be provided.

It is the schematic of the vehicle air conditioner which concerns on the 1st Embodiment of this invention. It is a table | surface which shows the air-conditioning mode of the vehicle air conditioner which concerns on the 1st Embodiment of this invention. Fig.3 (a) is typical sectional drawing in the AA shown in FIG.3 (b), FIG.3 (b) is a schematic of the air conditioner for vehicles which concerns on the 2nd Embodiment of this invention. FIG. FIG. 4A is a schematic cross-sectional view taken along the line AA shown in FIG. 4B, and shows a flow of conditioned air. FIG. 4B shows the second embodiment of the present invention. It is a schematic plan view which shows the flow of the conditioned air of the vehicle air conditioner which concerns on a form. It is the schematic of the vehicle air conditioner which concerns on the 3rd Embodiment of this invention. It is the schematic of the vehicle air conditioner which concerns on the 4th Embodiment of this invention. It is the schematic of the vehicle air conditioner which concerns on the 5th Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in light of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(First embodiment)
As shown in FIG. 1, the vehicle air conditioner 1a according to the first embodiment of the present invention includes a first air passage 60a that communicates inside air in the vehicle interior to the foot outlet 15, and a first air passage 60a. The first air blower 30 for blowing air, the first heating heat exchanger (heater core) 50a for overheating the air blown by the first air blower 30, and the second air for communicating outside air in the passenger compartment to the differential outlet 16 A second air blower 32 that blows air to the second air passage 61a, a second heating heat exchanger (heater core) 50b that superheats the air blown by the second air blower 32, the first air blower 30 and the first air blower 30 2 The air blower control part 35 which controls each air volume of the air blower 32 and controls the air distribution ratio of the air blown from the foot blower outlet 15 and the differential blower outlet 16 is provided.

  Further, the vehicle air conditioner 1a according to the first embodiment of the present invention includes the first outside air 10 for introducing the inside air in the vehicle interior to the first air passage 60a and the first outside air for introducing outside air outside the vehicle compartment. An inside / outside air switching device 20 which is provided with an intake port 11 and can selectively switch the ratio between the inside air introduced from the first inside air intake port 10 and the outside air introduced from the first outside air intake port 11, and the inside / outside air switching A cooling heat exchanger (evaporator) 40 that is disposed in the first air passage 60a provided with the device 20 and cools the air at an upstream position of the first heating heat exchanger 50a, and a first heating heat exchanger 50a And a first communication passage 90 that communicates the first air passage 60a and the second air passage 61a at a position downstream of the second heat exchanger 50b, and the first air passage 60a. The first that controls communication with the second air passage 61a Amikkusu further comprising a door (first communication control unit) 22.

  Moreover, the vehicle air conditioner 1a which concerns on the 1st Embodiment of this invention is provided with the 2nd external air intake 12 which introduces the external air outside a vehicle compartment to the 2nd ventilation path 61a.

  The 1st inside air intake 10 is an intake opening opened in order to introduce inside air into the vehicle air conditioner 1a. The 1st external air intake 11 is an intake opening opened in order to introduce external air into the vehicle air conditioner 1a. An inside / outside air switching device 20 is provided in the vicinity of the first inside air inlet 10 and the first outside air inlet 11. The inside / outside air switching device 20 can block the first inside air intake 10 and the first outside air intake 11. The inside / outside air switching device 20 can control to introduce only the inside air from the first inside air intake port 10 by closing the first outside air intake port 11 and also closes the first inside air intake port 10. Thus, it is possible to control to introduce only the outside air from the first outside air intake port 11. Moreover, the inside / outside air switching device 20 adjusts the opening degree of the first inside air intake port 10 and the first outside air intake port 11 without closing both the first inside air intake port 10 and the first outside air intake port 11. It is possible to selectively switch the ratio between the inside air and the outside air.

  The second outside air intake 12 is an intake opening that is opened to introduce outside air into the vehicle air conditioner 1a separately from the first outside air intake 11. A second outside air intake selection device 21 is provided at the second outside air intake 12. The second outside air intake selection device 21 can close the second outside air intake 12, and blocks the introduction of outside air from the second outside air intake 12 by closing the second outside air intake 12. Can do. Further, when the second outside air intake selection device 21 opens the second outside air intake 12, the outside air can be introduced from the second outside air intake 12.

  The first blower 30 is a blower fan or the like that is provided at a downstream position of the inside / outside air switching device 20 and generates an air flow toward the vehicle interior. The first air blower 30 is rotated by a blower motor 31 to generate an air flow. The air flow generated by the first blower 30 blows the inside air and the outside air selectively introduced by the inside / outside air switching device 20 toward the cooling heat exchanger 40.

  The second air blower 32 is a blower fan or the like that is provided at a downstream position of the second outside air intake selection device 21 and generates an air flow toward the vehicle interior. The air flow generated by the second blower 32 causes the outside air introduced from the second outside air intake port 12 to pass through the duct 70 and blow toward the second heating heat exchanger 50b.

  A dust collection filter (not shown) is provided at a downstream position of the second blower 32 to prevent dust and dirt from entering the second heating heat exchanger 50b. This filter may be provided in the upstream position of the 2nd air blower 32, and multiple may be sufficient as it.

  The first air blower 30 and the second air blower 32 are controlled by the air blower control unit 35, respectively. The blower control unit 35 controls the air volume by controlling the voltage applied to each blower motor of the first blower 30 and the second blower 32. And the air blower control part 35 controls the air distribution ratio of the air blown off from the foot blower outlet 15 and the differential blower outlet 16 by controlling the air volume from the 1st air blower 30 and the 2nd air blower 32. be able to.

  The first heating heat exchanger 50a and the second heating heat exchanger 50b are devices that generate hot air by exchanging heat with the inside air and the outside air using a medium heated by heat generated by the engine or the like. . The first heating heat exchanger 50a and the second heating heat exchanger 50b can be used as an integral heating heat exchanger 50. The heating heat exchanger 50 is provided at a location downstream of the cooling heat exchanger 40 where the first air passage 60a and the second air passage 61a are adjacent to each other, and the first air passage 60a and the second air passage. 61a.

  The cooling heat exchanger 40 is a cooling device using heat of vaporization caused by evaporation. The cooling heat exchanger 40 cools the inside air and the outside air blown by the first blower 30. A dust collection filter 41 is provided at an upstream position of the cooling heat exchanger 40 to prevent dust, dust, and the like from entering the cooling heat exchanger 40.

  The 1st ventilation path 60a is ventilated by the 1st air blower 30, and is connected to the foot blower outlet 15 which blows off the air-conditioning air which passed the heat exchanger 40 for cooling and the heat exchanger 50a for 1st heating to a passenger | crew's step. It is a ventilation path.

  In the second air passage 61a, the outside air introduced from the second outside air inlet 12 is blown to the second heating heat exchanger 50b by the second blowing device 32, and passes through the second heating heat exchanger 50b. Is an air passage that communicates with the differential outlet 16 that blows the air to the window glass in the passenger compartment.

  A duct 70 serving as a path through which the outside air introduced from the second outside air inlet 12 is blown to the second heating heat exchanger 50b by the second blowing device 32 can be used for the second blowing path 61a. The duct 70 is set to blow out along the direction of the air flow generated by the first blower 30.

  The first air mix door 22 has a first air passage 60a and a second air passage 61a at positions downstream of the first heating heat exchanger 50a and the second heating heat exchanger 50b (heating heat exchanger 50). It is provided in the 1st communicating path 90 which connects, and the communication with the 1st ventilation path 60a and the 2nd ventilation path 61a is controlled. The 1st air mix door 22 is a plate-shaped door, a shutter, etc., and should just be a shape which can select closure and opening of the 1st communicating path 90.

  The 1st air mix door 22 obstruct | occludes the 1st communicating path 90, and is the 1st ventilation path 60a and the 2nd ventilation path in the downstream position of the heat exchanger 50a for 1st heating, and the heat exchanger 50b for 2nd heating. 61a can be partitioned. By closing the 1st communicating path 90 with the 1st air mix door 22, a two-layer flow path is formed and it becomes a two-layer flow mode. Moreover, the 1st air mix door 22 opens the 1st communicating path 90, is connected, and the 1st ventilation path 60a in the downstream position of the heat exchanger 50a for 1st heating and the heat exchanger 50b for 2nd heating is carried out. And the 2nd ventilation path 61a can be made to merge.

  The vehicle air conditioner 1a includes a foot outlet 15 for blowing conditioned air to the feet of the occupant, a differential outlet 16 for blowing conditioned air to the windshield in the passenger compartment, and a vent outlet for blowing the conditioned air toward the upper body side of the occupant. 17 is provided.

  Below, the air-conditioning mode of the vehicle air conditioner 1a is demonstrated with reference to FIG. The air conditioning mode of the vehicle air conditioner 1a includes, for example, six types of modes: a vent mode, a bi-level mode, a foot mode, a differential foot mode 1, a differential foot mode 2, and a differential mode.

  The vent mode is a mode in which conditioned air having a 100% air distribution ratio is blown out from the vent blowout port 17, and only the vent blowout door (not shown) is opened. The bi-level mode is a mode in which conditioned air having an air distribution ratio of 60% from the vent outlet 17 and 40% from the foot outlet 15 is blown, and the vent outlet door and the foot outlet door (not shown) are opened. The The foot mode is a mode in which conditioned air having a 100% air distribution ratio is blown out from the foot outlet 15 and only the foot outlet door is opened. The differential foot mode 1 is a mode in which conditioned air having an air distribution ratio of 85% from the foot outlet 15 and 15% from the differential outlet 16 is blown out. The foot outlet door 80 and the differential outlet door (not shown) are provided. Opened. The differential foot mode 2 is a mode in which conditioned air having an air distribution ratio of 60% from the foot outlet 15 and 40% from the differential outlet 16 is blown, and the foot outlet door and the differential outlet door are opened. The differential mode is a mode in which conditioned air having a 100% air distribution ratio is blown from the differential blower outlet 16, and only the differential blower door is opened.

  The vehicle air conditioner 1a is operated in the two-layer flow mode at least during operation in the two modes of the differential foot mode 1 and the differential foot mode 2. The differential foot mode 1 and the differential foot mode 2 are selected during the heating operation. In particular, when the outside air is at a low temperature, the differential foot mode 2 is selected during the maximum heating operation.

  The operation in the two-layer flow mode of the vehicle air conditioner 1a will be described below. In the vehicle air conditioner 1a, the operation in the two-layer flow mode is, for example, at the time of the low outside temperature and the maximum heating operation.

  The inside / outside air switching device 20 in the two-layer flow mode performs control to block the first outside air intake port 11 and introduce only the inside air from the first inside air intake port 10.

  The second outside air intake selection device 21 in the two-layer flow mode performs control to open the second outside air intake 12 and introduce outside air from the second outside air intake 12.

  The first air mix door 22 in the two-layer flow mode performs control to close, closes the first communication passage 90, and the first air passage 60 a and the second air passage 61 a at the downstream position of the heating heat exchanger 50. Is divided into two laminar flows.

  The first blower device 30 and the second blower device 32 in the two-layer flow mode are individually controlled by the blower control unit 35. For example, in the case of the differential foot mode 1, the blower control unit 35 is configured so that the conditioned air having an air distribution ratio of 85% from the foot outlet 15 and 15% from the differential outlet 16 is blown out. The voltage applied to the blower 30 and the second blower 32 is controlled to control the air volume from the first blower 30 and the second blower 32. Further, in the differential foot mode 2, the blower control unit 35 is configured so that the conditioned air having an air distribution ratio of 60% from the foot outlet 15 and 40% from the differential outlet 16 is blown out. The voltage applied to the blower 30 and the second blower 32 is controlled to control the air volume from the first blower 30 and the second blower 32.

  The inside air in the two-layer flow mode is blown by the air flow generated by the first blower 30 and travels toward the cooling heat exchanger 40. The inside air that has passed through the cooling heat exchanger 40 in the two-layer flow mode goes to the first heating heat exchanger 50a. After passing through the cooling heat exchanger 40, the inside air in the two-layer flow mode toward the heating heat exchanger 50 does not merge with the outside air that has been taken in from the second outside air inlet 12 and passed through the duct 70. The air is blown out from the foot outlet 15.

  The outside air taken in from the second outside air inlet 12 in the two-layer flow mode is blown by the air flow generated by the second blowing device 32 and passes through the cooling heat exchanger 40 by passing through the duct 70. Without going to the second heating heat exchanger 50b. The outside air that has passed through the duct 70 does not merge with the inside air because the first communication passage 90 is blocked by the first air mix door 22. The outside air that has passed through the second heating heat exchanger 50 b is blown out from the differential outlet 16.

  According to the vehicle air conditioner 1a according to the first embodiment, the air blower control unit 35 individually controls the air volumes of the first blower 30 and the second blower 32, so that the foot outlet 15 and the differential blower The air distribution ratio of the conditioned air blown out from the blowout port 16 can be controlled. By controlling the air distribution ratio of the conditioned air blown out from the foot outlet 15 and the differential outlet 16, the degree of freedom of air conditioning control can be improved.

  Moreover, according to the vehicle air conditioner 1a according to the first embodiment, when operating in the two-layer flow mode at the low outside air temperature, it is possible to reduce the load applied to the heating by the internal air circulation, and The outside air is used to prevent window fogging by performing control to introduce low-humidity outside air from the second outside air inlet 12 and exhaust only from the differential outlet 16 after passing through the second heat exchanger 50b. It can be used only for that purpose.

(Second Embodiment)
As shown in FIGS. 3 (a) and 3 (b), the vehicle air conditioner 1b according to the second embodiment of the present invention has a second air blowing compared with the vehicle air conditioner 1a shown in FIG. The passage 61b passes through a duct (bypass duct) 70 that bypasses the cooling heat exchanger 40 from the second outside air intake 12 and passes through the first heating heat exchanger 50a and the second heating heat exchanger 50b (for heating). The difference is that the air-conditioning air that has passed through the heat exchanger 50) is an air passage that communicates with the differential air outlet 16 that blows off the wind glass in the vehicle interior. In the second embodiment, a description will be given assuming that the first heat exchanger 50a and the second heat exchanger 50b are the integrated heat exchanger 50.

  Further, the vehicle air conditioner 1b according to the second embodiment is provided in the second communication passage 91 that communicates the first air passage 60a and the second air passage 61b on the upstream side of the heating heat exchanger 50. The second air mix door (second communication control device) 23 that controls communication between the first air passage 60a and the second air passage 61b, and the heating heat exchanger 50 on the downstream side of the cooling heat exchanger 40 A difference is that a third air mix door (third communication control device) 24 is provided which is provided in the air passage not passing through and controls whether or not the air passage not passing through the heating heat exchanger 50 is communicated. Others are substantially the same, and thus redundant description is omitted.

  The 2nd air mix door 23 can block | close the 2nd communicating path 91 by making it the open state (FIG. 3 (a) dotted line position). By closing the 2nd communicating path 91 with the 2nd air mix door 23, in the upstream position of the heat exchanger 50 for a heating, the 1st ventilation path 60a and the 2nd ventilation path 61a can be partitioned off. Moreover, the 2nd air mix door 23 can block | close the air flow which flows in into the heat exchanger 50 for a heating in an upstream position by making it the closed state (FIG. 3 (a) solid line position).

  In the vehicle air conditioner 1b, it is determined whether or not the air passage that does not pass through the heating heat exchanger 50 is communicated with the air passage that does not pass through the heating heat exchanger 50 at the downstream position of the cooling heat exchanger 40. A third air mix door 24 to be controlled is provided.

  The 2nd air mix door 23 and the 3rd air mix door 24 control the ratio of the conditioned air which goes to the heat exchanger 50 for heating, after cooling with the heat exchanger 40 for cooling and performing dehumidification. Specifically, if the second air mix door 23 is closed and the air going to the heating heat exchanger 50 is shut off, and the third air mix door 24 is opened, the conditioned air goes to the heating heat exchanger 50 at all. There will be no maximum cooling. On the contrary, if the 3rd air mix door 24 is closed and the 2nd air mix door 23 is opened, all the conditioned air will go to the heat exchanger 50 for heating, and it can be set as the maximum heating. Thus, the ratio of the conditioned air toward the heat exchanger 50 for heating can be controlled by interlocking the second air mix door 23 and the third air mix door 24 to control the opening degree.

  The vehicle air conditioner 1b includes a foot outlet 15 for blowing conditioned air to the feet of the passenger, a differential outlet 16 for blowing conditioned air to the windshield in the passenger compartment, and a vent outlet for blowing the conditioned air toward the upper body side of the passenger 17 is provided. The foot outlet 15 is provided with a foot outlet door 80 for controlling the conditioned air that is blown out to the feet. The differential outlet 16 is provided with a differential outlet 81 for controlling the conditioned air blown out to the window glass. The vent outlet 17 is provided with a vent outlet door 82 that controls conditioned air that is blown out toward the upper body.

  The vehicle air conditioner 1b operates in the two-layer flow mode at least during operation in the two modes of the differential foot mode 1 and the differential foot mode 2. The differential foot mode 1 and the differential foot mode 2 are selected during the heating operation. In particular, when the outside air is at a low temperature, the differential foot mode 2 is selected during the maximum heating operation.

  Hereinafter, the operation of the vehicle air conditioner 1b in the two-layer flow mode will be described with reference to FIGS. 4 (a) and 4 (b). In the vehicle air conditioner 1b, the operation in the two-layer flow mode is, for example, at the time of low outside air temperature and at the time of maximum heating operation.

  The state of the air intake port in the two-layer flow mode is shown using FIG. The inside / outside air switching device 20 performs control to block the first outside air intake port 11 and introduce only the inside air from the first inside air intake port 10. Further, the second outside air intake selection device 21 performs control to open the second outside air intake 12 and introduce outside air from the second outside air intake 12.

  The state of the air outlet in the two-layer flow mode is shown using FIG. The foot outlet 15 is controlled to open the foot outlet door 80 and is opened. Further, the differential outlet 16 is opened by the control of the differential outlet 81 being opened. Further, the vent outlet 17 is closed by controlling the vent outlet door 82 to be closed.

  The state of the 1st air mix door 22, the 2nd air mix door 23, and the 3rd air mix door 24 in 2 laminar flow mode is shown using Fig.4 (a). The first air mix door 22 performs a closing control, closes the first communication passage 90, partitions the first air passage 60a and the second air passage 61a at the downstream position of the heating heat exchanger 50, and creates a two-layer flow. To. The second air mix door 23 performs opening control, closes the second communication passage 91, partitions the first air passage 60a and the second air passage 61a at the upstream position of the heating heat exchanger 50, and creates a two-layer flow. To. Since the 3rd air mix door 24 performs control contrary to the 2nd air mix door 23, close control is performed and it is made for all the conditioned air to go to the heat exchanger 50 for heating.

  The first blower device 30 and the second blower device 32 in the two-layer flow mode are individually controlled by the blower control unit 35. For example, in the case of the differential foot mode 1, the blower control unit 35 is configured so that the conditioned air having an air distribution ratio of 85% from the foot outlet 15 and 15% from the differential outlet 16 is blown out. The voltage applied to the blower 30 and the second blower 32 is controlled to control the air volume from the first blower 30 and the second blower 32. Further, in the differential foot mode 2, the blower control unit 35 is configured so that the conditioned air having an air distribution ratio of 60% from the foot outlet 15 and 40% from the differential outlet 16 is blown out. The voltage applied to the blower 30 and the second blower 32 is controlled to control the air volume from the first blower 30 and the second blower 32.

  The inside air in the two-layer flow mode is blown by the air flow generated by the first blower 30 as shown in FIGS. 4 (a) and 4 (b). The inside air that has passed through the cooling heat exchanger 40 in the two-layer flow mode is because the second air mix door 23 is open and the third air mix door 24 is closed, as shown in FIG. It goes to the heat exchanger 50 for heating. After passing through the cooling heat exchanger 40, the internal air in the two-layer flow mode toward the heating heat exchanger 50 has the second communication path 91 closed by the second air mix door 23. It is taken in from the outside air inlet 12 and does not merge with outside air that has passed through the duct 70. The inside air that has passed through the heat exchanger 50 for heating in the two-layer flow mode is blown out from the open foot outlet 15 that is controlled so that the foot outlet door 80 is opened. After passing through the heating heat exchanger 50, the internal air in the two-layer flow mode toward the foot outlet 15 is closed in the first communication passage 90 by the first air mix door 22. The outside air that has passed through the vessel 50 does not merge.

  The outside air taken in from the second outside air inlet 12 in the two-layer flow mode is blown by the air flow generated by the second blower 32 as shown in FIG. The outside air in the two-layer flow mode passes through the duct 70 and goes to the heating heat exchanger 50 without passing through the cooling heat exchanger 40. Since the outside air that has passed through the duct 70 is blocked by the first air mix door 22 and the second air mix door 23, it does not merge with the inside air. Then, the outside air that has passed through the heating heat exchanger 50 is blown out from the opened differential blower outlet 16 that is controlled so that the differential blowout door 81 is opened.

  The vehicular air conditioner 1b according to the second embodiment configured as described above can achieve the same effects as the vehicular air conditioner 1a according to the first embodiment.

  Moreover, the vehicle air conditioner 1b which concerns on 2nd Embodiment is between the heat exchanger 40 for cooling of the 1st ventilation path 60a, the heat exchanger 50 for heating, and the duct 70 which is the 2nd ventilation path 61a. A second communication passage 91 that communicates with the second outside air intake selection device 21 and the heat exchanger 50 for heating and a second air mix door 23 that opens and closes the second communication passage 91 are provided. As a result, the second air mix door 23 is adjusted so that the second communication passage 91 is in a communicating state while the air passage to the heat exchanger 50 for heating is not blocked, and the second outside air intake selection device 21 is adjusted to adjust the second air mixing door 23. By closing the outside air intake 18, the blown air blown by the first blower 30 can be blown over the entire surface of the heat exchanger 50 for heating.

(Third embodiment)
As shown in FIG. 5, the vehicle air conditioner 1c according to the third embodiment of the present invention is located upstream of the heating heat exchanger 50 as compared with the vehicle air conditioner 1a shown in FIG. A fourth air mix door 27 that is provided and controls a blowing area introduced from the first blowing path 60a and a blowing area introduced from the second blowing path 61a in the heating heat exchanger 50; and a heating heat exchanger 50, a fifth air mix door 28 that controls the air blowing area that blows air to the first air passage 60a and the air blowing area that blows air to the second air passage 61a in the heating heat exchanger 50. Is different. Others are substantially the same as those in the first embodiment, and thus redundant description is omitted.

  As shown in FIG. 5, the 4th air mix door 27 is fluctuate | varied from the state of 27a to the state of 27c, and the ventilation area of the heat exchanger 50 for a heating introduced from the 1st ventilation path 60a and the 2nd ventilation path 61a Can be varied. In the state of 27a in which the fourth air mix door 27 closes the second air passage 61a, the air from the second air passage 61a is prevented from being introduced into the heating heat exchanger 50, and the air from the first air passage 60a is prevented. Only the air is introduced into the heat exchanger 50 for heating. When the fourth air mix door 27 is in the state of 27b, 27c, the air from the first air passage 60a and the second air passage 61a can be introduced into the heat exchanger 50 for heating. In the state of 27b, the 4th air mix door 27 becomes smaller than the state of 27c in the ventilation area of the heat exchanger 50 for a heating introduced from the 2nd ventilation path 61a.

  As shown in FIG. 5, the fifth air mix door 28 can be changed from the state 28a to the state 28b. When the 5th air mix door 28 is in the state of 28a, it is in the state where the ventilation area of the heat exchanger 50 for heating which blows to the 1st ventilation path 60a was enlarged, and the ventilation from the heat exchanger 50 for heating is the 1st. This is a state with priority over the air passage 60a. When the 5th air mix door 28 is in the state of 28b, it is the state which enlarged the ventilation area of the heat exchanger 50 for a heating which ventilates to the 2nd ventilation path 61a, and the ventilation from the heat exchanger 50 for a heating is 2nd. This is a state with priority over the air passage 61a.

  The operation of the fourth air mix door 27 and the fifth air mix door 28 will be described.

  In the two-layer flow mode, the state of 27b or 27c is selected for the fourth air mix door 27 in order to introduce outside air from the second air passage 61a into the heating heat exchanger 50. The 4th air mix door 27 selects the state of 27b or 27c in order to change the ventilation area of the heat exchanger 50 for a heating according to the change of the airflow ratio from the foot blower outlet 15 and the differential blower outlet 16. FIG. For example, as shown in the table of FIG. 2, the fourth air mix door 27 is in the state 27b in the differential foot mode 1 in which conditioned air is blown out from the differential outlet 16 with a small air distribution ratio. It is. The fourth air mix door 27 is in the state 27c, for example, in the differential foot mode 2 in which the conditioned air is blown out from the differential outlet 16 with a larger air distribution ratio.

  In the fourth air mix door 27, in a mode other than the two-layer flow mode, the state of 27a in which the second air passage 61a is closed is selected, and the air from the second air passage 61a is introduced into the heating heat exchanger 50. prevent.

  The fifth air mix door 28 selects the state of 28a or 28b in order to change the blowing area from the heat exchanger 50 for heating according to the change in the air volume ratio from the foot outlet 15 and the differential outlet 16. . The fifth air mix door 28 is selected in the state 28a when an air conditioning mode with a large air distribution ratio from the foot outlet 15 is selected. Further, the fifth air mix door 28 is in the state 28b when the air conditioning mode with a large air distribution ratio from the differential outlet 16 is selected.

  The vehicular air conditioner 1c according to the third embodiment configured as described above can achieve the same effects as the vehicular air conditioner 1a according to the first embodiment.

  Moreover, according to the vehicle air conditioner 1c which concerns on 3rd Embodiment, when the air conditioning mode with much blowing amount is selected from the foot blower outlet 15, in the heat exchanger 50 for a heating, 2nd ventilation path 61a. The fourth air mix door 27 is controlled to be in the state of 27b so as to reduce the blowing area of the blowing air (outside air) introduced from the outside, and the blowing area for blowing air to the second blowing path 61a in the heating heat exchanger 50 is By controlling the fifth air mix door 28 to the state of 28a so as to be reduced, the heating performance of the air conditioning blown out from the foot outlet 15 can be improved.

  That is, the vehicle air conditioner 1c according to the third embodiment controls the fourth air mix door 27 and the fifth air mix door 28 in accordance with the change in the air flow ratio from the foot outlet 15 and the differential outlet 16. And since the ventilation area of the heat exchanger 50 for a heating can be changed, it becomes possible to improve heating performance.

(Fourth embodiment)
As shown in FIG. 6, the vehicle air conditioner 1d according to the fourth embodiment of the present invention is located upstream of the heating heat exchanger 50 as compared with the vehicle air conditioner 1b shown in FIG. 4th air which is provided in the downstream position of the 2nd air mix door 23, and controls the ventilation area introduced from the 1st ventilation path 60a in the heat exchanger 50 for heating, and the ventilation area introduced from the 2nd ventilation path 61a. The air flow area that is provided downstream of the mix door 27 and the heat exchanger 50 for heating and blows air to the first air passage 60a and the air area that blows air to the second air passage 61a in the heat exchanger 50 for heating. The difference is that a fifth air mix door 28 is further provided. Others are substantially the same as those of the second embodiment, and thus redundant description is omitted.

  Since the fourth air mix door 27 and the fifth air mix door 28 are substantially the same as those in the third embodiment, the overlapping description is omitted.

  According to the vehicle air conditioner 1d according to the fourth embodiment, between the cooling heat exchanger 40 and the heating heat exchanger 50 in the first air passage 60a and the duct 70 that is the second air passage 61a. A second communication passage 91 that communicates with the second outside air intake selection device 21 and the heat exchanger 50 for heating and a second air mix door 23 that opens and closes the second communication passage 91 are provided. For this reason, when operating in a mode other than the two-layer flow mode, the second air mix door 23 is adjusted so that the second communication path 91 is in a communicating state while the air passage to the heating heat exchanger 50 is not blocked. By adjusting the second outside air intake selection device 21 and closing the second outside air intake port 18, the blown air blown by the first blower device 30 can be blown over the entire surface of the heat exchanger 50 for heating. At this time, since the 4th air mix door 27 and the 5th mix door 28 do not become resistance of the ventilation to the heat exchanger 50 for heating, the state of 27c and 28b is selected, and the ventilation from the 1st ventilation path 60a is carried out. Is introduced into the heat exchanger 50 for heating.

  Even in the vehicle air conditioner 1d according to the fourth embodiment configured as described above, it is possible to obtain the same effects as the vehicle air conditioners 1a to 1c according to the first to third embodiments.

(Fifth embodiment)
As shown in FIG. 5, the vehicle air conditioner 1e according to the fifth embodiment of the present invention includes a first air passage 60b that communicates the inside air of the passenger compartment to the foot outlet 15, and a first air passage 60b. A first air blower 30 that blows air, a first heat exchanger 50a that overheats the air blown by the first air blower 30, a second air passage 61b that communicates outside air in the vehicle interior to the differential outlet 16, The second air blower 32 that blows air to the second air passage 61b, the second heating heat exchanger 50b that overheats the air blown by the second air blower 32, and the respective air volumes of the first air blower 30 and the second air blower 32 And a blower control unit 35 that controls the air distribution ratio of the blown air blown from the foot blower outlet 15 and the differential blower outlet 16.

  The vehicle air conditioner 1e according to the fifth embodiment of the present invention also includes a first inside air intake 10 for introducing the inside air in the vehicle interior to the second air passage 60b and a first outside air for introducing outside air outside the vehicle compartment. An inside / outside air switching device 20 which is provided with an intake port 11 and can selectively switch the ratio between the inside air introduced from the first inside air intake port 10 and the outside air introduced from the first outside air intake port 11, and the inside / outside air switching The cooling heat exchanger 40 is disposed in the first air passage 60b provided with the device 20 and cools the air at the upstream position of the first heating heat exchanger 50a, and the first heating heat exchanger 50a and the second heat exchanger 50a. A first communication passage 90 communicating with the first air passage 60b and the second air passage 61b at a position downstream of the heat exchanger 50b for heating, and the first air passage 60b and the second air passage are provided in the first communication passage 90. 1st air mixed which controls communication with path 61b Further comprising a 22.

  Moreover, the vehicle air conditioner 1e which concerns on the 5th Embodiment of this invention is provided with the 2nd inside air intake 18 which introduces the inside air of a vehicle interior into the 1st ventilation path 60b.

  About the vehicle air conditioner 1e which concerns on 5th Embodiment, the description about the location substantially the same as the vehicle air conditioner 1a which concerns on 1st Embodiment is abbreviate | omitted.

  The second inside air intake 18 is an intake opening that is opened to introduce the inside air into the vehicle air conditioner 1e separately from the first inside air intake 10. The second room air intake 18 is provided with a second room air intake selection device 26. The second room air intake selection device 26 can block the second room air intake 18 and block the introduction of room air from the second room air intake 18 by closing the second room air intake 18. Can do. When the second room air intake selection device 26 opens the second room air intake port 18, the room air can be introduced from the second room air intake port 18.

  The operation in the two-layer flow mode of the vehicle air conditioner 1e according to the fifth embodiment will be described below. In the vehicle air conditioner 1e, the operation in the two-layer flow mode is, for example, at a low outside air temperature and at a maximum heating operation.

  When the vehicle air conditioner 1e according to the fifth embodiment is used in the two-layer flow mode, first, the opening between the first inside air intake 10 and the first outside air intake 11 is performed by the inside / outside air switching device 20. The degree is adjusted, outside air is introduced from the first outside air intake port 11, and inside air is introduced from the second inside air intake port 18.

  The outside air introduced from the first outside air intake 11 is blown by the air flow generated by the first blower 30 and travels toward the cooling heat exchanger 40. The outside air that has passed through the cooling heat exchanger 40 goes to the first heating heat exchanger 50a. The outside air that has passed through the first heating heat exchanger 50a is blown out from the opened differential outlet 16.

  On the other hand, the inside air introduced from the second inside air intake port is blown by the air wind generated by the second blowing device 32. The inside air introduced from the second inside air intake 18 passes through the duct 70 and travels to the second heating heat exchanger 50b. And the inside air which passed the 2nd heating heat exchanger 50b is blown off from the open foot blower outlet 15. At that time, since the first air mix door 22 of the first communication passage 90 is closed, the inside air and the outside air are blown out without being mixed.

  The first blower device 30 and the second blower device 32 in the two-layer flow mode are individually controlled by the blower control unit 35. For example, in the case of the differential foot mode 1, the blower control unit 35 is configured so that the conditioned air having an air distribution ratio of 85% from the foot outlet 15 and 15% from the differential outlet 16 is blown out. The voltage applied to the blower 30 and the second blower 32 is controlled to control the air volume from the first blower 30 and the second blower 32. Further, in the differential foot mode 2, the blower control unit 35 is configured so that the conditioned air having an air distribution ratio of 60% from the foot outlet 15 and 40% from the differential outlet 16 is blown out. The voltage applied to the blower 30 and the second blower 32 is controlled to control the air volume from the first blower 30 and the second blower 32.

  According to the vehicle air conditioner 1e according to the fifth embodiment, the air blower control unit 35 individually controls the air volumes of the first blower 30 and the second blower 32, so that the foot outlet 15 and the differential blower The air distribution ratio of the conditioned air blown out from the blowout port 16 can be controlled. By controlling the air distribution ratio of the conditioned air blown out from the foot outlet 15 and the differential outlet 16, the degree of freedom of air conditioning control can be improved.

  Further, according to the vehicle air conditioner 1e according to the fifth embodiment, when operating in the two-layer flow mode at a low outside air temperature, the already heated inside air does not pass through the cooling heat exchanger 40. In addition, it becomes possible to reduce the load applied to the heating by circulating the inside air.

  Moreover, according to the vehicle air conditioner 1e which concerns on 5th Embodiment, since it is possible to reduce the load concerning heating by internal air circulation, low temperature and low humidity external air is sent from the 1st external air intake port 11. Even if a small amount is introduced, there is little influence on the heating effect, and window fogging can be prevented by introducing low humidity outside air. Since the cooling heat exchanger 40 is not frozen by a small amount of outside air to be introduced, it is not necessary to prevent freezing, and the dehumidifying performance can be ensured.

(Other embodiments)
As described above, the present invention has been described according to the embodiment. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques should be apparent to those skilled in the art.

  For example, although the air conditioning mode in the vehicle air conditioners 1a to 1e in the first to fifth embodiments is shown as six modes, it may be six modes or more. In the embodiment, two types of differential foot modes that are operated in the two-layer flow mode are shown. However, a mode in which conditioned air with a wind distribution ratio of 70% from the foot outlet 15 and 30% from the differential outlet 16 is blown out. Can also be added. In addition, the differential foot mode operated in the two-layer flow mode is set as a variable system, and the conditioned air with the air distribution ratio of 60 to 85% from the foot outlet 15 and 15 to 40% from the differential outlet 16 is blown out. It can also be done.

  Thus, it should be understood that the present invention includes various embodiments and the like not described herein. Therefore, the present invention is limited only by the invention specifying matters in the scope of claims reasonable from this disclosure.

DESCRIPTION OF SYMBOLS 1a-1e ... Vehicle air conditioner 10 ... 1st inside air intake 11 ... 1st outside air intake 12 ... 2nd outside air intake 15 ... Foot blower outlet 16 ... Differential blow outlet 17 ... Vent blow outlet 18 ... 2nd inside air intake Port 20 ... Inside / outside air switching device 21 ... Second outside air intake selection device 22 ... First air mix door 23 ... Second air mix door 24 ... Third air mix door 26 ... Second inside air intake selection device 27 ... Fourth air mix Door 28 ... Fifth air mix door 30 ... First blower 31 ... Blower motor 32 ... Second blower 33,41 ... Filter 35 ... Blower controller 40 ... Cooling heat exchanger 50 ... Heating heat exchanger 50a ... 1st heat exchanger 50b ... 2nd heat exchanger 60a, 60b ... 1st ventilation path 61a, 61b ... 2nd ventilation path 70 ... Duct 80 ... Foot blowing Exit door 81 ... Differential outlet door 82 ... Vent outlet door 90 ... First communication path 91 ... Second communication path

Claims (6)

A first air passage that communicates the inside air of the passenger compartment to the foot outlet, a first air blower that blows air to the first air passage, a first heat exchanger that heats the air from the first air blower,
A second air passage that communicates outside air in the passenger compartment to the differential air outlet, a second air blower that blows air to the second air passage, a second heat exchanger that heats the air from the second air blower,
A blower control unit that controls the air volume of each of the first blower and the second blower and controls the air distribution ratio of the blown air blown from the foot blower outlet and the differential blower outlet. A vehicle air conditioner.   The first heating heat exchanger and the second heating heat exchanger are integral heating heat exchangers, and the first air passage and the second air passage are adjacent to each other. 2. The vehicle air conditioner according to claim 1, wherein the heat exchanger for heating is disposed across the first air passage and the second air passage. 4th air which is provided in the upstream position of the said heat exchanger for heating, and controls the ventilation area introduced from the said 1st ventilation path and the ventilation area introduced from the said 2nd ventilation path in the said heat exchanger for heating Mixed doors,
5th air which is provided in the downstream position of the said heat exchanger for heating, and controls the ventilation area introduced from the said 1st ventilation path and the ventilation area introduced from the said 2nd ventilation path in the said heat exchanger for heating The vehicle air conditioner according to claim 2, further comprising a mix door. A first inside air intake port for introducing the inside air in the vehicle interior and a first outside air intake port for introducing outside air outside the vehicle room are provided in either of the first air passage and the second air passage, and the first inside air inlet port is provided. An inside / outside air switching device capable of selectively switching the ratio of the inside air introduced from the outside air introduced from the first outside air intake port;
Arranged in either the first air passage or the second air passage provided with the inside / outside air switching device, upstream of at least one of the first heating heat exchanger and the second heating heat exchanger. A cooling heat exchanger that cools the air flow at a location;
A first communication passage communicating the first air passage and the second air passage at a downstream position of the first heat exchanger and the second heat exchanger;
4. The apparatus according to claim 1, further comprising a first air mix door that is provided in the first communication passage and controls communication between the first air passage and the second air passage. The vehicle air conditioner described in 1. A second communication passage communicating the first air passage and the second air passage at an upstream position of the first heat exchanger and the second heat exchanger;
A second air mix door provided in the second communication path and configured to control communication between the first air flow path and the second air flow path or blockage of the second air flow path is further provided. The vehicle air conditioner according to any one of claims 1 to 4.   The second air mix door is capable of closing the first air passage and the second air passage at an upstream position of the first heat exchanger and the second heat exchanger. The vehicle air conditioner according to claim 5.

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