JP2006015842A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle solving the problem of insurance of an air amount at the maximum heating operation and a problem of re-heat at the maximum cooling operation and realizing execution of comfortable air-conditioning operation. <P>SOLUTION: In the air conditioner for the vehicle, regarding air introduced into a casing 11, adjustment of a flow rate passing through an evaporator 12 and a heater core 13 is performed to perform air-conditioning and an air passage partition plate 17 for separating an air flowing out surface of the heater core 13 and a warm air flow passage 18 communicated with a foot blowing out port 15 and a defrost blowing out port 16 is provided in the casing 11. A communication port 23 provided with a by-pass damper 24 is provided on the air passage partition plate 17 opposed to the air flowing out surface of the heater core 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle air conditioner used for air conditioning in a vehicle, and more particularly, to a vehicle air conditioner that performs air conditioning with an evaporator and a heater core.

2. Description of the Related Art Conventionally, a vehicle air conditioner that provides a comfortable vehicle interior environment by performing heating and cooling and dehumidification of the vehicle interior is known. Such a vehicle air conditioner condenses gas refrigerant by exchanging heat with a compressor that operates using a part of the output of an internal combustion engine for vehicle travel and air outside the vehicle compartment (outdoor air). A condenser (condenser), an expansion valve that decompresses the liquid refrigerant, and an evaporator (evaporator) that vaporizes the liquid refrigerant by exchanging heat with air introduced from outside or inside the vehicle compartment are connected by refrigerant piping. It has a closed circuit refrigeration cycle.
The evaporator described above has a function of taking heat of vaporization from air, and is usually installed in a HVAC (Heating, Ventilation, and Air-Conditioning) unit together with a heater core serving as a heating source for heating. Room air or outdoor air) is cooled and dehumidified.

Moreover, the vehicle air conditioner described above includes three types of air outlets that supply conditioned air to the vehicle interior in accordance with the selected air conditioning operation mode. That is, a defroster outlet for removing fog such as a windshield, a vent (face) outlet that opens to the front surface of the instrument panel in the passenger compartment, and a foot outlet that opens to the feet of the occupant are provided. .
In such a vehicle air conditioner, regarding the temperature of the air blown out from each outlet, from the function and comfort of each outlet, “air temperature of defrost outlet (Tdef)”> “foot outlet The relationship “air temperature (Tfoot)”> “air temperature at vent outlet (Tvent)” may be required.

In the vehicle air conditioner that satisfies such a requirement for the blowing temperature, for example, as shown in FIG. 6, the positional relationship between the air outlets provided in the casing 11 of the HVAC unit 10 </ b> A passes through the evaporator 12 and the heater core 13. On the downstream side, there is a configuration in which a vent outlet 14, a foot outlet 15, and a defrost outlet 16 are arranged in this order from the upstream side near the evaporator 12 and the heater core 13. Further, the air outflow surface (rear side), which is the warm air outlet side of the heater core 13 disposed in the casing 11, is partitioned from the warm air air flow path leading to the foot outlet 15. In order to mix the air heated by passing through the heater core 13 (warm air) with the air cooled by passing through the evaporator 12 (cold air), an air passage partition plate 17 is disposed. It can be led to a mix region Mx formed above the heater core 13. Note that all of the air introduced into the heater core 13 has passed through the evaporator 12 regardless of whether the refrigerant is circulating in the refrigeration cycle. (For example, see Patent Document 1)
JP 2003-34119 A

However, in the vehicle air conditioner having the above-described conventional configuration, the following problems occur due to the presence of the partition plate 17.
The first problem is led to the airway partition plate 17 installed for temperature adjustment (for mixing hot air and cold air) in the maximum heating (Max. Hot) operation state shown in FIG. Since the warm air flows through the mix region Mx (see arrow Hf), the detour is made with respect to the foot outlet 15. For this reason, since the flow path of a warm air becomes long and air path pressure loss increases, there exists a problem of causing the fall of an air volume if the capability of a blower fan is the same. Although it is possible to secure the air volume by increasing the size of the blower fan, it is not preferable because it is disadvantageous in terms of electric capacity and installation space.

  The second problem is that in the maximum cooling (Max. Cool) operation state shown in FIG. 7, the warm air flows from the back side of the heater core 13 due to the recirculation flow (cavity flow) of the arrow F generated on the back side of the heater core 13. Is sucked out and warm air is mixed with the cold air passing through the evaporator 12 to be reheated. That is, in the vehicle air conditioner in which the hot water of the heat source constantly circulates through the heater core 13, the air entrained in the peripheral area of the heater core 13 is heated and the temperature rises. Therefore, the hot air is cooled by the evaporator 12. There is concern that the cooling air is reheated and the temperature of the air blown out from the vent outlet 14 is raised by the suction (in the arrow Cf), and the air is blown out from the vent air outlet 14, thereby hindering a comfortable cooling operation.

As described above, in the conventional vehicle air conditioner including the partition plate, it is desired to reduce the air path pressure loss during the maximum heating operation and ensure a sufficient air volume. In addition, it is desired to perform cooling operation with comfortable cold air that prevents reheating of the cold air during maximum cooling operation and does not cause unnecessary temperature rise.
The present invention has been made in view of the above circumstances, and the object thereof is to solve the problems caused by the presence of the partition plate, that is, the problem of securing the air volume during the maximum heating operation and the maximum cooling. An object of the present invention is to provide a vehicle air conditioner that solves the problem of reheating during operation and enables more comfortable air conditioning operation.

In order to solve the above problems, the present invention employs the following means.
The vehicle air conditioner according to the present invention adjusts the flow rate of the air introduced into the casing through the cooling means and the heating means for air conditioning, and communicates with the air outlet surface of the heating means and the hot air outlet. An air conditioner for a vehicle in which an air passage partition plate separated from a flow path is provided in a casing, and a communication port provided with an opening / closing means is provided in the air passage partition plate facing the air outflow surface. It is characterized by this.

  According to such a vehicle air conditioner, since the air passage partition plate provided with the opening / closing means is provided on the air passage partition plate facing the outlet side surface of the heating means, the opening / closing means is operated during maximum heating to fully open the communication opening. Then, since warm air flows directly into the conditioned air flow path from the air outflow surface of the heating means, the flow path of the warm air leading to the warm air outlet can be shortened to reduce the wind path pressure loss. In this case, the hot air outlet is a foot outlet or a defrost outlet.

  In the above vehicle air conditioner, the opening / closing means has a first opening / closing position in which the communication port is fully closed, and a second opening in which the communication port is fully opened and the vicinity of the inlet portion of the conditioned air flow path is blocked. It is preferable that the damper swings between the opening and closing position of this, and by this, if the opening and closing means is operated and the communication port is fully opened at the time of maximum cooling, the vicinity of the inlet portion of the conditioned air flow path is shut off, It is possible to prevent the reheating caused by the hot air staying in the vicinity of the heating means being sucked out by the flow of the cold air and joined.

  In the above vehicle air conditioner, the opening / closing means is preferably selected in the second opening / closing position in the vent blowing operation mode, the foot blowing operation mode, and the defrost blowing operation mode. Then, reheating is prevented, and air path pressure loss is reduced in the foot blowing operation mode and the defrost blowing operation mode.

  In the vehicle air conditioner described above, it is preferable that the opening / closing means can select any intermediate opening between the first opening / closing position and the second opening / closing position. The amount of warm air supplied to the foot outlet or the defrost outlet can be adjusted. Such an intermediate opening of the opening / closing means is suitable as a means for adjusting the amount of hot air blown from the foot outlet in the bi-level blowing operation mode.

According to the above-described vehicle air conditioner of the present invention, the air passage partition plate facing the air outflow surface of the heating means is provided with a communication port provided with an opening / closing means, and the communication port is operated by operating the opening / closing means during maximum heating. If fully open, the flow path of the hot air to the hot air outlet is shortened and the air path pressure loss is reduced, so that the amount of hot air blown out can be increased without increasing the capacity of the blower fan. An effect is obtained.
Further, a damper that swings between a first opening / closing position where the communication port is fully closed and a second opening / closing position where the communication port is fully open and closes the vicinity of the inlet of the conditioned air flow path is used as the opening / closing means. By adopting it, it is possible to operate the damper of the opening and closing means at the maximum cooling to open the communication port fully and shut off the vicinity of the inlet part of the air conditioning air flow path, thus preventing the reheating of the cold air by the hot air And air conditioning efficiency and comfortable cooling operation are possible.

That is, if the opening / closing means is set to the second opening / closing position in the vent blowing operation mode, the foot blowing operation mode, and the defrost blowing operation mode, reheating of the cold air can be prevented in the vent blowing operation mode. In the defrost blowing operation mode, the wind path pressure loss can be reduced.
And by enabling the opening and closing means to select any intermediate opening, it is possible to adjust the amount of warm air supplied to the foot outlet and the defrost outlet, particularly in the bi-level outlet operation mode, By adjusting the amount of hot air blown from the foot outlet, air-conditioning operation corresponding to the passenger's preference and cold districts becomes possible.

Hereinafter, an embodiment of a vehicle air conditioner according to the present invention will be described with reference to the drawings.
The perspective view shown in FIG. 2 is a partial cross-sectional perspective view showing an external configuration example of a main part of a vehicle air conditioner (hereinafter referred to as “air conditioner”) 1. The air conditioner 1 includes an inside / outside air switching box 3 that can selectively introduce air outside the vehicle interior (indoor air) or air outside the vehicle interior (outdoor air) by operating the inside / outside air switching damper 2, and a blower fan 4. HVAC (Heating, Ventilation, and Air-Conditioning) unit 10. In the following description, indoor air and outdoor air before air conditioning introduced from the inside / outside air switching box 3 are collectively referred to as “introduction air”, such as hot and cold air that has been air-conditioned after passing through a heat exchanger. Air is collectively referred to as “conditioned air”.

  Such an air conditioner 1 has a function of providing a comfortable vehicle interior environment by supplying air-conditioned air to the vehicle interior to perform air conditioning and dehumidification, and a part of the output of the vehicle traveling internal combustion engine. An unillustrated compressor that is operated by using, an unillustrated condenser (condenser) that condenses gas refrigerant by exchanging heat with outside air (outdoor air), and an unillustrated uncompressed liquid refrigerant. It has a closed circuit refrigeration cycle in which an expansion valve and an evaporator (evaporator) 12 that exchanges heat with introduced air to vaporize liquid refrigerant are connected by a refrigerant pipe. The evaporator 12 described above has a function of depriving the heat of vaporization from the introduced air, and the cooling air installed in the HVAC unit 10 together with the heater core 13 serving as a heating source (heating means) for normal heating is used. Cooling and dehumidification are performed.

  FIG. 1 is a view showing the AA cross section of FIG. 2 described above. The HVAC unit 10 of the air conditioner 1 has a hollow casing 11, and is cooled substantially upright on the vehicle front side in the casing 11. An evaporator (evaporator) 12 serving as a heat exchanger is disposed, and a heater core 13 serving as a heating heat exchanger is disposed below the evaporator 12 and behind the evaporator 12. In other words, the positional relationship between the evaporator 12 and the heater core 13 in the casing 11 is such that the evaporator 12 is disposed on the upstream side (the side close to the blower fan 4) in the introduction air flow direction, and the heater core 13 is disposed on the downstream side thereof. The configuration is Further, the casing 11 of the HVAC unit 10 is provided with a vent outlet 14, a foot outlet 15, and a defrost outlet 16 that open into the vehicle compartment in order from the upstream side in the flow direction of the conditioned air.

Inside the casing 11, an air passage partition plate 17 is provided at a position facing the air outflow surface side of the heater core 13 with a predetermined interval. The air passage partition plate 17 is provided upward from the lower end support surface of the heater core 13 and substantially parallel to the heater core 13 to the vicinity of the mix region Mx. The upper end portion 17a of the air passage partition plate 17 is formed in a curved surface that faces substantially forward, and is formed in a streamline shape.
Further, on the back surface (back surface) side of the air passage partition plate 17 as viewed from the heater core 13 side, warm air is supplied from the mixing region Mx formed on the downstream side of the evaporator 12 and on the heater core 13 between the casing 11 and the casing 11. A hot air flow path 18 communicating with the foot outlet 15 and the defrost outlet 16 is formed. The mix region Mx is a space for mixing the cool air cooled by the evaporator 12 and the warm air heated by the heater core 13 to form conditioned air having a desired temperature.

An air mix damper 19 is provided between the evaporator 12 and the heater core 13 to selectively switch the flow path of the air that has passed through the evaporator 12. The air mix damper 19 swings between a maximum heating position indicated by a solid line in the drawing and a maximum cooling position indicated by a two-dot chain line with a shaft 19a as a fulcrum, and an intermediate opening in the middle according to an operation mode described later. An arbitrary damper position including the degree position can be selected as appropriate. In the illustrated configuration example, the air passage area of the heater core 13 is set smaller than the evaporator 12 (about half), and the space formed between the upper end of the heater core 13 and the upper casing 11 passes through the evaporator 12. It becomes the cold wind bypass flow path 20 for directing the performed air directly to the mix region Mx.
In addition, in the maximum heating position of the air mix damper 19 shown as a continuous line in FIG. 1, since the cold wind bypass flow path 20 is fully closed, the air that has passed through the evaporator 12, that is, the introduction air or cooling that does not receive cooling is reduced. The entire amount of the conditioned air (cold air) received is guided to the heater core 13 for heating.

  The vent outlet 14 is provided with a vent damper 21 that swings about a shaft 21a as a fulcrum. The vent damper 21 has a position where the vent air outlet 14 is fully opened (indicated by a solid line in the figure), a position where the vent air outlet 14 is fully opened and the inlet 18a of the hot air flow path 18 is fully closed (in the figure). And a desired blowing mode can be selected. In addition, also about this vent damper 21, arbitrary intermediate | middle opening can be suitably selected according to the operation mode mentioned later.

  Further, a foot / defrost switching damper (hereinafter referred to as a “switching damper”) 22 that swings around a shaft 22 a is provided at the branch portion 18 b of the hot air flow path 18. The switching damper 22 is configured such that the foot air outlet 15 is fully open and the defrost air outlet 16 is fully closed (indicated by a solid line in the figure), the foot air outlet 15 is fully closed, and the defrost air outlet 16 is fully open. It swings between the positions (indicated by a two-dot chain line in the figure) so that a desired blowing mode can be selected. In addition, also about this switching damper 21, arbitrary intermediate | middle opening can be suitably selected according to the operation mode mentioned later.

Further, the HVAC unit 10 configured as described above has a communication port 23 formed in the air passage partition plate 17 and a bypass damper 24 provided as an opening / closing means for the communication port 23.
In this case, the communication port 23 is in a positional relationship substantially facing the heater core 13. That is, a part of the air passage partition plate 17 at a position where the heated air-conditioned air that has passed through the heater core 13 substantially straightly strikes is removed, and the hot air that has passed through the heater core 13 flows directly into the hot air flow path 18. A communication port 23 is formed in the front. The opening area of the communication port 23 is preferably as close as possible to the air passage area of the heater core 13 in order to reduce the flow path resistance and reduce the air path pressure loss. However, the bypass damper 24 is opened and closed. In consideration of necessary space and various conditions such as downsizing of the HVAC unit 10, it is desirable to secure at least the cross-sectional area of the hot air flow path 18.

  The bypass damper 24 has a shaft 24a as a fulcrum, a position where the communication port 23 is fully opened and the middle of the hot air flow path 18 is blocked and fully closed (indicated by a solid line in the figure), and the communication port 23 is fully closed. In addition, it swings between the position where the hot air flow path 18 is fully opened (indicated by a two-dot chain line in the figure) so that a desired blowing mode can be selected. In this case, the position where the bypass damper 24 blocks the hot air flow path 18 is a position coincident with the upper end portion of the heater core 13 or the upper end portion so that the hot air that has passed through the heater core 13 does not flow out to the mix region Mx side. The upstream side is closer to the mix region Mx. The bypass damper 24 can also arbitrarily select any intermediate opening according to the operation mode described later.

Next, the operation (action) of the air conditioner 1 of the present embodiment described above will be described for each operation mode.
First, a foot blowing operation mode in which warm air is blown out to passenger feet in the passenger compartment will be described with reference to FIG. In this operation mode, the air mix damper 19 is in a position in which the cold air bypass passage 20 is fully closed, and the bypass damper 24 is in a position where the hot air passage 18 is shut off and the communication port 23 is fully open. It becomes the operation state of the maximum heating that blows out only. The vent damper 21 is set to a position where the vent outlet 14 is fully closed, and the switching damper 22 is set to a position where the defrost outlet 16 is fully closed.

  When the air conditioner 1 is operated with such a damper position setting, the entire amount of air passes through the evaporator 12 through the inside / outside air switching box 3 and the blower fan 4. At this time, if the refrigerant circulates, the cold air cooled by the evaporator 12 is supplied to the downstream heater core 13, so that dehumidifying heating that blows the dehumidified hot air is possible, and when there is no circulation of the refrigerant, The introduced air simply passes through the evaporator 12 and is supplied to the heater core 13 as it is. The flow after passing through the evaporator 12 is the same regardless of whether the above-described cold air or introduced air is used. Therefore, the case of cold air will be described below.

The cold air that has passed through the evaporator 12 is heated by passing through the heater core 13 because the air mix damper 19 fully closes the cold air bypass passage 20. As a result, the cold air becomes dehumidified hot air, and as shown by the arrow Hf in the figure, the entire amount flows out from the fully open communication port 23 directly, that is, without passing through the mix region Mx, to the hot air flow path 18, Furthermore, it blows off toward the passenger | crew's feet in a vehicle interior from the foot opening 15 of a full opening.
In this way, since the warm air that has passed through the heater core 13 flows out directly from the communication port 23 to the warm air channel 18 and reaches the foot outlet 15, a straight channel is formed. Compared with a conventional structure that requires a change in direction, the flow path length is shortened and the flow becomes smooth, so that the air path pressure loss can be greatly reduced.

Therefore, when the warm air flows through the flow path in which the air path pressure loss is reduced, it is possible to increase the amount of blown air according to the reduction in the air path pressure loss without changing the capacity of the blower fan 4. That is, the blown air volume of the blower fan 4 has a correlation with the blown air pressure, and the blown air volume at the blowout port increases as the pressure loss in the flow path decreases, so that the blown air volume can be increased. In other words, since the amount of blown air can be increased without increasing the capacity of the blower fan 4, it is possible to increase the size of the air conditioner 1 without affecting the installation space and the electric capacity. The maximum heating capacity can be improved by increasing the amount of blown air.
By the way, in the above-described embodiment, the opening / closing means is the swinging bypass damper 24. However, opening / closing means (for example, a sliding door, shutter, etc.) that simply opens and closes the communication port 23 is employed, and most of the hot air is used. The air path pressure loss at the time of maximum heating operation may be reduced by flowing directly to the foot outlet without passing through the mix region Mx.

  Next, a vent blowing operation mode for blowing cold air to the passengers in the passenger compartment will be described with reference to FIG. In this operation mode, the vent damper 21 is set to a position where the vent outlet 14 is fully opened. The air-mix damper 19 is in a position where the cold-air bypass flow path 20 is fully opened, and the bypass damper 24 is in a position where the hot-air flow path 18 is blocked and the communication port 23 is fully open, and only the cold air is blown into the vehicle interior. It becomes the driving state. The switching damper 22 is set at a position where the defrost outlet 16 is fully closed.

  When the air conditioner 1 is operated with such a damper position setting, the entire amount of introduced air passes through the evaporator 12 and is cooled. As shown by the arrow Cf in the figure, the entire amount of the cold air passes through the cold air bypass channel 20 and the air mix region Mx and flows out from the vent outlet 14 toward the vehicle interior. Such a flow is substantially the same as the conventional configuration shown in FIG. 7, but the hot air flow path 18 is blocked by the bypass damper 24, so that the hot air stays around the heater core 13 and is heated. Will not be sucked out and merged. That is, since it is possible to prevent the temperature of the cold air cooled by the evaporator 12 from being reheated and rising in temperature, a comfortable cooling operation with high air conditioning efficiency is possible.

  Next, a bi-level blowing operation mode that realizes so-called head cold foot heat by blowing cold air to the passenger in the passenger compartment and blowing hot air to the feet will be described with reference to FIG. In this operation mode, the vent damper 21 is set at an intermediate opening (for example, 50%), and is set at a position where the vent outlet 14 and the inlet 18a of the hot air passage 18 are half open. The air mix damper 19 is also set to an intermediate opening (for example, 50%) so that the cold air bypass passage 20 is half open, and the bypass damper 24 closes the communication port 23 and fully opens the hot air passage 18. Yes, the cold air is blown out from the vent outlet 14 and the hot air is blown out from the foot outlet 15. The switching damper 22 is set at a position where the defrost outlet 16 is fully closed.

  When the air conditioner 1 is operated with such a damper position setting, the entire amount of introduced air passes through the evaporator 12 and is cooled. Since the air mix damper 19 is set to an intermediate opening degree, this cold air flows through the cold air bypass passage 20 and the air mix region Mx and flows out from the vent outlet 14 toward the vehicle interior (see FIG. Middle arrow Cf) and the flow of hot air flowing through the heater core 13 and then flowing out from the foot outlet 15 toward the passenger's feet in the passenger compartment through the air mix region Mx and the hot air passage 18. (Arrow Hf in the figure). Such a flow is the same as the conventional configuration because the bypass damper 24 closes the communication port 23.

  Finally, a defrost blowing mode in which the hot air is blown toward the windshield or the like in the vehicle interior to remove fog will be described with reference to FIG. In this operation mode, the air mix damper 19 is in a position where the cold air bypass passage 20 is fully closed, and the bypass damper 24 blocks the hot air passage 18 and the communication port 23 is fully open. Further, the vent damper 21 is set at a position where the vent outlet 14 is fully closed, and the switching damper 22 is set at a position where the foot outlet 15 is fully closed, and all except the switching damper 16 blows only warm air into the vehicle interior. The same damper position as the maximum heating operation state is selected.

  In such a damper position setting, the warm air that has passed through the same path with the small wind path pressure loss as in the foot blowing operation mode flows into the warm air flow path 18 from the communication port 23 and flows out from the open defrost outlet 16 into the vehicle interior. . Also in this case, since the air path pressure loss is reduced, it is possible to increase the amount of warm air blown without increasing the performance of the blower fan 4. If the switching damper 22 is set to an intermediate opening degree in this operating state, it is possible to blow warm air from both the foot outlet 15 and the defrost outlet 16.

  Further, if the defroster outlet 16 is opened by operating the switching damper 22 from the above-described bi-level outlet operation mode (see FIG. 4), the cold air is blown out from the vent outlet 14 and simultaneously from the defrost outlet 16. Hot air can be blown out. If the switching damper 22 is set to an intermediate opening degree in this operation state, it is possible to blow out warm air from both the foot blowout port 15 and the defrost blowout port 16 at the same time as blowing cold air from the vent blowout port 14. Become.

  By the way, although the foot blowing operation mode and the vent blowing operation mode described above have been described for the maximum heating and the maximum cooling air conditioning operation, respectively, if the communication port 23 is closed by the bypass damper 24, the flow path configuration is the same as the conventional configuration. It is also possible to set the air mix damper 19 to an intermediate opening, mix cold air and hot air in the mix region Mx, and blow out conditioned air at a desired temperature.

As described above, the communication port 23 provided with the bypass damper (opening / closing means) 24 is provided in the air passage partition plate 17 facing the air outflow surface of the heater core (heating means) 13, and the bypass damper 24 is operated during maximum heating. If the communication port 23 is fully opened, the flow path of the hot air leading to the foot air outlet 15 and the defrost air outlet 16 which are the hot air outlets is shortened and the air path pressure loss is reduced. Even if it is not, it is possible to increase the amount of hot air blown out.
The bypass damper 24 swings between an open / close position where the communication port 23 is fully closed and an open / close position where the communication port 23 is fully open and the vicinity of the inlet 18a of the hot air flow path (air-conditioned air flow path) 18 is blocked. As the opening / closing means, the bypass damper 24 can be operated at the maximum cooling to open the communication port 23 and block the vicinity of the inlet 18a, thereby preventing the reheating of the cold air due to the hot air. Comfortable cooling operation with good air conditioning efficiency is possible.

  In addition, this invention is not limited to embodiment mentioned above, In the range which does not deviate from the summary of this invention, it can change suitably.

It is sectional drawing (AA cross section of FIG. 2) which shows one Embodiment of the air conditioning apparatus for vehicles which concerns on this invention, and has shown the foot blowing operation mode of maximum heating. It is a partial section perspective view showing the appearance of the air conditioning system for vehicles concerning the present invention. It is sectional drawing (AA cross section of FIG. 2) which shows one Embodiment of the air conditioning apparatus for vehicles which concerns on this invention, and has shown the vent blowing operation mode of maximum cooling. It is sectional drawing (AA cross section of FIG. 2) which shows one Embodiment of the air conditioning apparatus for vehicles which concerns on this invention, and has shown bilevel blowing operation mode. It is sectional drawing (AA cross section of FIG. 2) which shows one Embodiment of the air conditioning apparatus for vehicles which concerns on this invention, and has shown the defrost blowing operation mode. It is sectional drawing which shows the conventional vehicle air conditioning apparatus, and has shown the foot blowing operation mode of maximum heating. It is sectional drawing which shows the conventional vehicle air conditioning apparatus, and has shown the vent blowing operation mode of maximum cooling.

Explanation of symbols

1 Vehicle air conditioner (air conditioner)
10 HVAC unit 11 Casing 12 Evaporator (cooling means)
13 Heater core (heating means)
DESCRIPTION OF SYMBOLS 14 Vent blower outlet 15 Foot blower outlet 16 Defrost blower outlet 17 Air path partition plate 18 Hot air flow path 18a Inlet 18b Branch part 19 Air mix damper 20 Cold wind bypass flow path 21 Vent damper 22 Switching damper 23 Communication port 24 Bypass damper

Claims (4)

An air passage in which the air introduced into the casing is air-conditioned by adjusting the flow rate through which the cooling means and the heating means pass, and the air outlet surface of the heating means and the conditioned air flow path communicating with the hot air outlet are separated. A vehicle air conditioner in which a partition plate is provided in the casing,
An air conditioner for a vehicle, wherein a communication port having an opening / closing means is provided in the air passage partition plate facing the air outflow surface.   The opening / closing means swings between a first opening / closing position in which the communication port is fully closed and a second opening / closing position in which the communication port is fully opened and the vicinity of the inlet portion of the conditioned air flow path is blocked. The vehicle air conditioner according to claim 1, wherein the air conditioner is a damper.   3. The vehicle air conditioner according to claim 2, wherein the opening / closing means selects the second opening / closing position in a vent blowing operation mode, a foot blowing operation mode, and a defrost blowing operation mode.   4. The vehicle air conditioner according to claim 2, wherein the opening / closing means can select any intermediate opening between the first opening / closing position and the second opening / closing position. 5. .

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