JP2010100140A - Vehicular air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air-conditioner capable of promptly heating the inside of a vehicle cabin while properly removing the fogging of a window glass, and enabling power-saving operation. <P>SOLUTION: A first blower 110 is arranged on a downstream side of a conditioning airflow to an evaporator 104 in an air-conditioning case 111. A second inside air port 140 introducing air in the vehicle cabin into between a heater core 109 in the air-conditioning case 111 and the first blower 110 is formed. On the second inside air port 140, a second inside air door 141 for adjusting an opening/closing state of the second inside air port 140 and a second blower 143 are provided. An outside air passage 144 and an inside air passage 145 are formed by the second inside air door 141 and a first partitioning door 142 arranged on a downstream side of the conditioning airflow rather than the heater core 109, thereby executing air-conditioning control by an inside/outside air two-layer mode. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner that performs air conditioning in a vehicle compartment.

Conventionally, the thing of patent document 1 is known as a vehicle air conditioner. The ventilation path of the vehicle air conditioner described in Patent Document 1 is formed by an air conditioning case. The air conditioning case blows out air to an occupant's feet, an outside air inlet for sucking air outside the vehicle compartment, an inside air inlet for sucking air inside the vehicle compartment, a first outlet for blowing air to the windshield, and A second air outlet is formed. In the air conditioning case, an outside air inlet or an evaporator that cools the air sucked from the inside air inlet is disposed. Further, in the air conditioning case, a passage for guiding air sucked from the outside air inlet to the first air outlet through the evaporator, and air sucked from the inside air inlet to the second air outlet via the evaporator. A partition plate for partitioning the guide passage is provided. As a result, the air conditioned by the outside air is blown out to the windshield to remove the fogging of the windshield. In addition, air conditioned by the inside air is blown into the vehicle compartment to heat the vehicle compartment.
Japanese Patent Laid-Open No. 5-124426

  However, in the vehicle air conditioner described in Patent Document 1, since the air sucked from the outside air inlet or the inside air inlet always passes through the evaporator, even in a state where the conditioned air does not need to pass through the evaporator, It is necessary to ventilate the evaporator. As a result, air that does not need to pass through the evaporator must be cooled, and compressor power is wasted. In addition, there is a problem that it is difficult to achieve a power-saving operation that reduces the required air blowing capacity of the blower that blows the conditioned air to reduce the blower driving power.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention has an object to provide a vehicle air conditioner that can quickly heat the interior of a vehicle while appropriately removing fogging of the windshield, and can perform power saving operation. To do.

  In order to achieve the above object, the present invention employs the following technical means.

  The invention according to claim 1 includes an air-conditioning case (111) through which air-conditioned air circulates, a cooling heat exchanger (104) that is disposed in the air-conditioning case (111) and cools the air-conditioned air, and an air-conditioning case The air conditioning air flow is arranged downstream of the cooling heat exchanger (104) in (111) and is heated by the heating device (109) for heating the air conditioning air and the heating device (109) in the air conditioning case (111). First and second blowers (110, 143) that are arranged on the upstream side of the air flow and blow conditioned air into the vehicle interior, and a first interior air vent that is provided in the air conditioning case (111) and introduces air in the vehicle compartment (120), an air outlet (130) provided in the air-conditioning case (111) for introducing air outside the vehicle compartment, and a first air outlet (130) provided in the air-conditioning case (111) for blowing the air-conditioned air to the windshield ( 150 160) and a second air outlet (170) that is provided in the air conditioning case (111) and blows out conditioned air to the feet of the occupant, and is a heat exchange for cooling in the air conditioning case (111) A second air vent (140) that is provided on the downstream side of the conditioned air flow from the heater (104) and the first blower (110) and upstream of the conditioned air flow from the heating device (109) and that introduces air in the vehicle compartment Opening and closing means (121, 131, 141) for opening and closing the first inside mouth (120), the outside mouth (130), and the second inside mouth (140), and the outside air mouth (130) by the first blower (110). An outside air passage (144) for introducing the air outside the vehicle compartment introduced from the vehicle to the first air outlet (150, 160) via the cooling heat exchanger (104) and the heating device (109), and a second blower ( 143) Partition means (141, 142,) capable of forming an inside air passage (145) for guiding the air in the vehicle interior introduced from the inside air port (140) to the second outlet (170) via the heating device (109) 246, 247, 248, 249), and the opening / closing means (121, 131, 141) closes the first inside mouth (120), opens the outside mouth (130) and the second inside mouth (140), and partitions By means (141, 142, 246, 247, 248, 249), it is possible to set the inside / outside air two-layer mode in which the outside air passage (144) and the inside air passage (145) are formed. The first blower (110) and the second blower (143) are operated.

  According to this, when the windshield needs to be dehumidified during the heating operation, the dry air outside the vehicle compartment is cooled by the first blower (110) by the cooling heat exchanger (104) and the heating. It blows off to the windshield through the device (109), and the fogging of the windshield can be appropriately removed. Further, warm air in the vehicle compartment that does not pass through the cooling heat exchanger (104) is introduced into the air-conditioning case (111) from the second interior air port (140) by the second blower (143), and the heating device (109). Since the air is blown again into the vehicle compartment, the power saving operation can be performed while the vehicle compartment is rapidly heated. The power saving operation means that the ventilation resistance of the cooling heat exchanger (104) is reduced by the amount of introduced air introduced from the second inside air port (140), and the first blower (110) and the second blower ( 143) is reduced, the driving power of the fans (110, 143) is effectively reduced, and the amount of air passing through the cooling heat exchanger (104) is reduced, thereby reducing the compressor ( 101) is an operation that saves power. That is, it is possible to perform power saving operation while appropriately heating the interior of the vehicle while properly removing the fogging of the windshield.

  In the invention according to claim 2, the opening / closing means (121, 131, 141) includes the first inside air opening / closing means (121) for opening / closing the first inside air mouth (120) and the outside air for opening / closing the outside air mouth (130). Opening / closing means (131) and second inside air opening / closing means (141) for opening / closing the second inside air port (140) are provided, and the partitioning means (141, 142) are second inside air opening / closing means (141). The air-conditioning case (111) is provided on the downstream side in the air-conditioning air flow direction from the heating device (109) and the internal air door (141) rotating around the opening end on the air-conditioning air flow upstream side in the second inside air port (140). ) And a partition door (142) that rotates about the side wall surface (111a) as a rotation center, and the air conditioning control device (190) positions the inside air door (141) in the open state of the second inside air port (140). And rotate The inside door (142) and the outside air passage (144) are rotated by rotating the cut door (142) to a position where the tip of the inside air door (141) and the tip of the partition door (142) face each other across the heating device (109). ).

  According to this, the partitioning means (141, 142) and the second inside air opening / closing means (141) can be constituted by the same member, and the partitioning means (141, 142) and the second inside air opening / closing means (141) are configured. It can be provided with a simple configuration. Further, since the partition door (142) rotates about the side wall surface (111a) of the air conditioning case (111) as a rotation center, the partition door (142) is in a state along the side wall surface (111a) of the air conditioning case (111) during normal operation. 142) can be rotated. As a result, it is possible to minimize the influence on the conditioned air flow due to the provision of the partition door (142).

  In the invention according to claim 3, the inside air door (141) includes the first door portion (141 a) that rotates around the opening end of the second inside air mouth (140) on the upstream side of the conditioned air flow, and the first door portion (141 a). And a second door portion (141b) that rotates about the front end of the door portion (141a), and the control device (190) closes the first door portion (141a) with the second interior air port (140). And the second door part (141b) is rotated to a position where the main surface of the first door part (141a) and the main surface of the second door part (141b) face each other. The inside air port (140) is closed, and the first door portion (141a) is rotated to a position where the second inside air port (140) is opened, and the second door portion (141b) is turned to the first door portion (141a). ) Main surface and second door part (141b) By rotating the position for forming a surface side and is continuous, and forming inside air passage and (145) outside air passage (144) and.

  According to this, the 2nd inside air opening-and-closing means (141) can fold the 1st door part (141a) and the 2nd door part (141b) while closing the 2nd inside air mouth (140). As a result, the rotation space including the length of the first door portion (141a) and the second door portion (141b) is not required, and the rotation space for the length of the first door portion (141a) is sufficient. An increase in the size of the air conditioning case (111) can be suppressed. The second inside air opening / closing means (141) is adjusted so that the second inside air opening (140) is opened, and the length of the first door portion (141a) and the second door portion (141b) is set. Can extend to the heating device (109). As a result, the outside air passage (144) side and the inside air passage (145) side of the heating device (109) can be partitioned substantially evenly without increasing the size of the second inside air opening / closing means (141).

  The invention according to claim 4 is characterized in that the second inside air port (140) is provided on the lower side of the air conditioning case (111).

  According to this, the 2nd inside mouth (140) can be made into the position furthest away from a crew member, and it becomes possible to reduce inhalation noise by the 2nd blower (143).

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
The structure of a vehicle equipped with the vehicle air conditioner 100 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram illustrating a vehicle air conditioner 100 according to the present embodiment. On the paper surface on which FIG. 1 is described, the upper side of the paper is the front of the vehicle, and the lower side of the paper is the rear of the vehicle. Here, the vehicle front is the engine room side, and the vehicle rear is the vehicle interior (occupant side).

  The vehicle air conditioner 100 according to this embodiment includes an evaporator 104 constituting a refrigeration cycle 112, a heater core 109 disposed in a heater circuit 113 through which cooling water for cooling the engine 105 circulates, a first blower 110 for blowing air, and the like. The air conditioning case 111 is provided and configured. Moreover, it has ECU190 as an air-conditioning control apparatus which controls each apparatus.

  The refrigeration cycle 112 includes a compressor 101, a condenser 102, an expansion valve 103, and an evaporator 104 that are connected in an annular shape with piping. The compressor 101 is a fluid machine that compresses the refrigerant flowing out of the evaporator 104 to a high temperature and a high pressure. The condenser 102 is a heat exchanger that causes the high-temperature and high-pressure refrigerant discharged from the compressor 101 to exchange heat with the traveling wind and cools the refrigerant to low temperature and high pressure. The expansion valve 103 is a decompression unit that decompresses and expands the low-temperature and high-pressure refrigerant flowing out of the capacitor 102 to a low-temperature and low-pressure. The evaporator 104 is a heat exchanger that exchanges heat between the low-temperature and low-pressure refrigerant flowing out from the expansion valve 103 and the conditioned air ventilated by the first blower 110 to dehumidify and cool the conditioned air.

  The engine 105 is a water-cooled internal combustion engine for a vehicle, and includes a radiator circuit 114 that circulates cooling water on the radiator 108 side and a heater circuit 113 that circulates cooling water on the heater core 109 side. The radiator circuit 114 is provided with a water pump 106, a thermostat 107, a radiator 108, and a bypass path 108a. The water pump 106 is a fluid machine that circulates cooling water. The thermostat 107 is a flow rate opening / closing means that controls the amount of cooling water flowing into the radiator 108. The radiator 108 is a heat exchanger that cools the cooling water by allowing the cooling water allowed by the thermostat 107 to exchange heat with the traveling wind. The bypass 108 a is a pipe that bypasses the radiator 108.

  The heater circuit 109 is a circuit connected in parallel to the radiator 108, and a heater core 109 is provided in the middle thereof. The heater core 109 is a heating device that heats the conditioned air by causing the cooling water that has flowed out of the engine 105 to exchange heat with the conditioned air blown by the first blower 110. The heater circuit 113 is a so-called reheat type in which the flow rate of the cooling water to the heater core 109 is adjusted by a valve (not shown) so that the heating capacity of the heater core 109 is adjusted.

  Next, the structure of the vehicle air conditioner 100 in the present embodiment will be described in detail with reference to FIGS. 2 and 3. 2 and 3 are schematic views showing the vehicle air conditioner 100 in the present embodiment.

  The air conditioning case 111 accommodates the evaporator 104, the heater core 109, the first blower 110, the second blower 143, and the like, and forms a flow path of conditioned air. In the air conditioning case 111, the filter 114, the evaporator 104, the first blower 110, and the heater core 109 are arranged in this order from the upstream side to the downstream side in the flow of conditioned air for air conditioning the vehicle interior. Here, the air conditioning case 111 is not formed with a bypass passage that bypasses the filter 114, the evaporator 104, the first blower 110, and the heater core 109, and the air conditioning case 111 depends on the shape of these components. The diameter is as small as possible.

  The filter 114 removes dust, foreign matter, and the like from the conditioned air, and is provided close to the upstream side of the evaporator 104 in the conditioned air flow. The first blower 110 is a suction-type axial fan that sucks in the axial direction and blows air in the axial direction.

  In the air conditioning case 111, a first inside air port 120, an outside air port 130, a second inside air port 140, a defroster port 150, a face port 150, and a foot port 170 are formed.

  The first inside air port 120 is an introduction port that introduces air in the vehicle compartment into the air conditioning case 111. The first inside air port 120 is provided with a first inside air door 121 that adjusts the open / closed state of the first inside air port 120 as a first inside air opening / closing means. The first inside air door 121 in the present embodiment is a butterfly door. The outside air port 130 is an introduction port that introduces air outside the vehicle compartment into the air conditioning case 111. The outside air port 130 is provided with an outside air door 131 that adjusts the open / closed state of the outside air port 130 as outside air opening / closing means. The outside air door 131 in this embodiment is a butterfly door.

  The first inside air port 120 and the outside air port 130 are formed on the most upstream side in the air-conditioned air flow and on the vehicle upper side in the air-conditioning case 111. The outside air port 130 is located in front of the vehicle with respect to the first inside air port 120.

  The defroster port 150 is a blowout port that blows conditioned air from the air conditioning case 111 to the window glass. The defroster port 150 is provided with a defroster door 151 that adjusts the open / closed state of the defroster port 150. The defroster door 151 in this embodiment is a butterfly door.

  The face port 160 is a blowout port that blows conditioned air from the air conditioning case 111 to the chest of the passenger. The face port 160 is provided with a face door 161 that adjusts the open / closed state of the face port 160. The face door 161 in the present embodiment is a butterfly door.

  The foot port 170 is a blowout port that blows conditioned air from the air conditioning case 111 to the feet of the occupant. The foot opening 170 is provided with a foot door 171 that adjusts the open / closed state of the foot opening 170. The foot door 171 in the present embodiment is a butterfly door.

  The defroster port 150, the face port 160, and the foot port 170 are formed on the most downstream side in the conditioned air flow. The defroster port 150 and the face port 160 are formed on the vehicle upper side in the air conditioning case 111. The defroster port 150 is located above the face port 160 in the vehicle. Further, the foot opening 170 is formed on the vehicle lower side in the air conditioning case 111.

  The second interior air port 140 is an introduction port that introduces air in the vehicle compartment into the air conditioning case 111. The second inside air port 140 is formed between the first blower 110 and the heating device 109 in the air-conditioning air flow and on the lower side of the vehicle in the air-conditioning case 111.

  The second inside air port 140 is provided with a second inside air door 141 that adjusts the open / closed state of the second inside air port 140 as second inside air opening / closing means. The second inside air door 141, the first inside air door 121, and the outside air door 131 correspond to opening / closing means. In the present embodiment, the second inside air door 141 rotates the first door portion 141a of the plate door that rotates around the opening end on the upstream side of the conditioned air flow in the second inside air port 140 and the front end of the first door portion 141a. It has the 2nd door part 142b of the plate door which rotates as a center. The length from the rotation center to the tip of the first door portion 141a is substantially the same as the length from the rotation center to the tip of the second door portion 141b. The second inside air door 141 rotates the first door portion 141a to a position where the second inside air port 140 is closed, and the second door portion 141b is connected to the main surface of the first door portion 141a and the second door portion 141b. The second interior air port 140 is closed by being rotated so as to be folded at a position facing the main surface. On the other hand, while rotating the 1st door part 141a to the position where the 2nd inside mouth 140 becomes an open state, the 2nd door part 141b continues the main surface of the 1st door part 141a, and the main surface of the 2nd door part 141b. The second inside air port 140 is opened by rotating it so as to extend to a position where a surface to be formed is formed. The tip of the second door portion 141 b in the open state extends to the substantially center side of the heater core 109. That is, in the closed state, the tip of the second door portion 141 b is at the substantially center position of the heater core 109.

  A second blower 143 is disposed in the second inside air port 140. The second blower 143 is a suction-type axial fan that sucks in the axial direction and blows air in the axial direction. In the present embodiment, the second blower 143 uses a fan having a smaller fan diameter and a smaller driving motor output than the first blower 110.

  A first partition door 142 is disposed on the downstream side of the air conditioning air flow from the heater core 109 in the air conditioning case 111. The first partition door 142 is a plate door that is provided on the side wall surface 111a on the vehicle rear side of the air conditioning case 111 and rotates about the side wall surface 111a side as a rotation center. The length from the rotation center to the tip of the first partition door 142 is substantially the same as the distance from the side wall surface 111 a to the heater core 109. The open state of the 1st partition door 142 is the state rotated to the position along the side wall surface 111a. On the other hand, the closed state is a state in which the front end of the second door portion 141b of the second inside air door 141 in the open state and the front end of the first partition door 142 are rotated to a position facing each other across the heater core 109. That is, in the closed state, the tip of the first partition door 142 is at the substantially center position of the heater core 109. The first partition door 142 in the closed state partitions the space on the downstream side of the conditioned air flow into the upper and lower spaces with respect to the heater core 109 in the air conditioning case 111. Here, the second inside air door 141 and the first partition door 142 correspond to partition means.

  The ECU 190 controls the opening degrees of the first inside air door 121 and the outside air door 131 via the first door controller 191. The ECU 190 controls the opening degree of the second inside air door 141, the first partition door 142, the defroster door 151, the face door 161, and the foot door 171 via the second door controller 192. The ECU 190 controls the rotational speeds of the first blower 110 and the second blower 143 via the blower controller 193.

  The vehicle air conditioner 100 can change the air-conditioning air flow by forming the inside / outside air switching mode and the blowout switching mode by the opening / closing control of various doors by the ECU 190 described above. The inside / outside air switching mode is a mode for selecting an opening / closing state of each inlet and an opening / closing state of the first partition door 142, and includes an inside air mode, an outside air mode, and an inside / outside air two-layer mode.

  In the inside air mode, the first inside door 121 opens the first inside mouth 120, the outside air door 131 closes the outside mouth 130, the second inside air door 141 closes the second inside mouth 140, and the first partition door. 142 rotates to a position that is in an open state. Then, only the first blower 110 is driven. As a result, the air introduced into the air conditioning case 111 becomes air in the vehicle compartment introduced from the first inside air port 120.

  In the outside air mode, the first inside door 121 closes the first inside mouth 120, the outside air door 131 opens the outside mouth 130, the second inside air door 141 closes the second inside mouth 140, and the first partition door. 142 rotates to a position that is in an open state. Then, only the first blower 110 is driven. As a result, the air introduced into the air conditioning case 111 becomes air outside the vehicle compartment introduced from the outside air port 130.

  In the inside / outside air two-layer mode, the first inside door 121 closes the first inside mouth 120, the outside air door 131 opens the outside mouth 130, the second inside air door 141 opens the second inside mouth 140, The one-partition door 142 rotates to a position where it is in a closed state. Then, the first blower 110 and the second blower 143 are driven. As a result, air introduced into the air conditioning case 111 becomes air outside the vehicle compartment introduced from the outside air port 130 and air inside the vehicle compartment introduced from the second inside air port 140. As shown in FIG. 3, the air outside the vehicle compartment introduced from the outside air port 130 circulates in the outside air passage 144 formed by the second inside air door 141 and the first partition door 142. The air in the vehicle compartment introduced from the second inside air port 140 circulates in the inside air passage 145 formed by the second inside air door 141 and the first partition door 142.

  On the other hand, the blow switching mode is a mode for selecting an open / close state of each blow outlet, and includes a defroster mode, a face mode, a foot mode, a defroster / foot mode, a bi-level mode, and the like. And each said mode is formed by adjusting the doors 151, 161, and 171 provided in each blower outlet, and changing the blowing amount from each blower outlet. FIG. 2 shows the flow of conditioned air in the bi-level mode in the outside air mode, and FIG. 3 shows the flow of conditioned air in the bi-level mode in the inside / outside air two-layer mode.

  Next, the operation of the vehicle air conditioner 100 in this embodiment will be described. The vehicle air conditioner 100 in this embodiment is capable of cooling and heating the vehicle compartment.

1. During cooling (normal operation)
When the occupant desires cooling in the vehicle compartment, the refrigeration cycle 112 is activated and the valve for adjusting the flow rate of the cooling water to the heater core 109 is closed. The inside / outside air switching mode is set to the inside air mode or the outside air mode. Then, normal operation is performed. The conditioned air in the inside / outside air switching mode is introduced into the air conditioning case 111 from the first inside air port 120 or the outside air port 130 by the first blower 110, cooled by passing through the evaporator 104, and passed through the heater core 107. Then, it is blown into the vehicle compartment. Here, since the valve for adjusting the flow rate of the cooling water to the heater core 109 is closed during cooling, the cooling water is prevented from flowing into the heater core 109, and the heater core 109 is in a stopped state where it is not operating. Therefore, the conditioned air cooled by the evaporator 104 is blown into the vehicle compartment.

2. During heating (normal operation)
When the occupant desires heating of the vehicle interior, the refrigeration cycle 112 is activated, a valve for adjusting the flow rate of the cooling water to the heater core 109 is opened, and the opening degree is adjusted. The inside / outside air switching mode is set to the inside air mode or the outside air mode. Then, normal operation is performed. The conditioned air in the inside / outside air switching mode is introduced into the air conditioning case 111 from the first inside air port 120 or the outside air port 130 by the first blower 110, dehumidified by passing through the evaporator 104, and passes through the heater core 109. Then, it is blown into the vehicle compartment. Here, during heating, a valve for adjusting the flow rate of the cooling water to the heater core 109 is opened and the opening degree is adjusted, so that the cooling water is allowed to flow into the heater core 109 and the heater core 109 operates. Therefore, the conditioned air dehumidified by the evaporator 104 and heated by the heater core 109 is blown into the vehicle compartment.

3. Inside / outside air 2-layer mode (power-saving operation)
When the window glass needs to be dehumidified during the heating operation, the refrigeration cycle 112 is activated, the valve for adjusting the flow rate of the cooling water to the heater core 109 is opened, and the opening degree is adjusted. The inside / outside air switching mode is set to the inside / outside air two-layer mode, and the blowout switching mode is set to the defroster / foot mode, the foot mode, or the bi-level mode. Then, power saving operation is performed. The power saving operation means that the ventilation resistance of the evaporator 104 is decreased by the amount of the introduced air introduced from the second inside air port 140, and the necessary air blowing capacity of the first blower 110 and the second blower 143 is reduced. In this operation, the driving power of the blowers 110 and 143 is effectively reduced and the amount of air flowing through the evaporator 104 is reduced, thereby reducing the power of the compressor 101. In the inside / outside air two-layer mode, dry air outside the vehicle compartment is introduced into the air conditioning case 111 from the outside air port 130 by the first blower 110, dehumidified by passing through the evaporator 104, and passed through the heater core 109. The air is blown from the defroster port 150 or the face port 160 to the windshield in the vehicle compartment. Also, warm air in the vehicle compartment is introduced into the air conditioning case 111 from the second interior air port 140 without passing through the evaporator 104 by the second blower 143, passes through the heater core 109, and passes through the foot mouth 170 to the passengers in the vehicle interior. It is blown out to the feet.

  The configuration and operation of this embodiment are as described above. Since the vehicle air conditioner 100 in the present embodiment is set to the inside air mode or the outside air mode during normal cooling, the conditioned air cooled by passing through the evaporator 104 can be blown into the vehicle interior. Similarly, during normal heating, since the inside air mode or the outside air mode is set, the conditioned air dehumidified after passing through the evaporator 104 can be blown into the vehicle interior.

  Further, when the windshield needs to be dehumidified during heating operation, the inside / outside air two-layer mode is set, the blowing switching mode is set to the defroster / foot mode, the foot mode, or the bi-level mode. Since the first blower 110 and the second blower 143 are operated, the dry air outside the vehicle compartment is blown out to the windshield by the first blower 110, and the fogging of the windshield can be appropriately removed. In addition, warm air in the vehicle compartment is introduced into the air conditioning case 111 from the second interior air port 140 without passing through the evaporator 104 by the second blower 143 and blown out to the feet of the occupant. However, the power saving operation of the fans 110 and 143 and the compressor 101 can be performed. That is, the vehicle air conditioner 100 according to the present embodiment can quickly heat the vehicle interior and appropriately execute power saving operation while appropriately removing the fogging of the windshield.

  Moreover, since the 1st partition door 142 rotates to the position along the side wall surface 111a of the air-conditioning case 111 in an open state, the influence on the air-conditioning air flow by providing the 1st partition door 142 is suppressed to the minimum. Is possible.

  In addition, the second inside air door 141 is configured by the first door part 141a and the second door part 141b having substantially the same length from the rotation center to the tip, and rotates so as to be folded in the closed state. Since the rotation space for the length of the one-door portion 141a is sufficient, the increase in size of the air conditioning case 111 can be suppressed. Further, since the second inside air door 141 rotates so as to extend toward the substantially central side of the heater core 109 in the opened state, the outside air passage 144 side and the inside air passage 145 in the heater core 109 are not enlarged without increasing the size of the second inside air door 141. It becomes possible to partition the sides substantially evenly.

  Moreover, since the 2nd inside air port 140 is formed in the position away from the passenger | crew of the vehicle lower side in the air-conditioning case 111, the suction noise of the air suck | inhaled with respect to a passenger | crew by the 2nd air blower 143 can be reduced.

  In addition, since the evaporator 104, the first blower 110, and the heater core 109 are arranged in this order from the front of the vehicle to the rear of the vehicle, the compressor 101, the condenser 102, and the expansion valve 103 that constitute the refrigeration cycle 112 are arranged. The evaporator 104 can be brought close to the position. As a result, it is possible to shorten the piping connecting them. Further, since the heater core 109 is disposed on the vehicle rear side from the first blower 110 and the second blower 143, the suction noise of the first blower 110 and the suction noise of the second blower 143 are insulated from the passenger by the heater core 109. It becomes possible.

(Other embodiments)
In the said 1st Embodiment, the 2nd inside air door 141 is used as a partition means. However, for example, as a modification of the partitioning unit, a partition door different from the second inside air door 141 may be provided as shown in FIG. FIG. 4 is a schematic diagram showing a vehicle air conditioner 200 according to another embodiment. The vehicle air conditioner 200 includes a butterfly-type second inside air door 241 as second inside air opening / closing means. A butterfly-type second partition door 246 and a third partition door 247 are disposed on the upstream side of the air-conditioned air flow with respect to the heater core 109 and on the vehicle lower side in the air-conditioning case 111. The second partition door 246 and the third partition door 247 are in the open state when they are rotated to positions along the air-conditioned air flow, and are in the closed state when they are rotated to positions where the outside air passage 144 and the inside air passage 145 are formed. To do. A first partition wall 248 is provided between the second partition door 246 in the closed state and the third partition door 247 in the closed state, and between the third partition door 247 in the closed state and the heater core 109. A second partition wall 249 is provided. According to the above configuration, as shown in FIG. 4, in the inside / outside air two-layer mode, the second inside door 140 is opened by the second inside air door 241 so that the second partition door 246 and the third partition door 247 are opened. By setting the above closed state, the outside air passage 144 and the inside air passage 145 can be formed.

  In the first embodiment, the rotating first partition door 142 is used as the partition means. However, the partition means provided on the downstream side of the conditioned air flow from the heater core 109 may be a partition plate fixed to the air conditioning case 111.

  Moreover, in the said 1st Embodiment, the 2nd inside air door 141 has the surface where the main surface of the 1st door part 141a and the main surface of the 2nd door part 141b continue in the 2nd door part 141b at the time of an open state. It is rotated to the position to form. However, the main surface of the 1st door part 141a and the main surface of the 2nd door part 141b do not need to form the continuous surface used as a plane. For example, the second inside air door 141 may be bent into a “<” shape in the open state.

  In the first embodiment, the second interior air port 140 is formed on the lower side of the air conditioning case 111. However, the 2nd inside air mouth 140 may be formed in the side wall in the air-conditioning case 111, or the upper side, for example.

  In the first embodiment, a suction-type axial flow fan is used as each of the fans 110 and 143. However, each of the blowers 110 and 143 may use, for example, a multistage axial fan, a reversing fan, a cross flow fan, a mixed flow fan, or a centrifugal fan.

  Moreover, in the said 1st Embodiment, although the 1st air blower 110 is arrange | positioned with respect to the evaporator 104 in the conditioned air flow downstream, for example, even if arrange | positioned with respect to the evaporator 104 at the conditioned air flow upstream. good.

  Moreover, in the said 1st Embodiment, although various doors are comprised by the plate door or the butterfly door, it is not limited to it, For example, a sliding door and a rotary door may be sufficient.

  Moreover, in the said 1st Embodiment, although the defroster port 150, the face port 160, and the foot port 170 are formed as a blower outlet, it is not limited to this, For example, for a rear seat face port, A foot opening may be formed.

  In the first embodiment, the filter 114 is arranged on the upstream side of the conditioned air flow with respect to the evaporator 104, but may be arranged on the downstream side of the conditioned air flow with respect to the evaporator 104, for example. Moreover, you may arrange | position in the air-conditioning air flow downstream of the heater core 109. FIG. Furthermore, the filter 114 may be omitted.

  Moreover, in the said 1st Embodiment, although it is the reheat type vehicle air conditioner 100, an air mix type provided with an air mix door may be sufficient.

  In the first embodiment, the ECU 190 performs opening / closing control of various doors. However, the opening and closing of various doors may be performed manually.

  In the first embodiment, the first inside air port 120 is provided with the first inside air switching door 121, the outside air port 130 is provided with the outside air switching door 131, and the second inside air switching door 140 is provided with the second inside air. A switching door 141 is provided. However, a switching door that adjusts the open / closed state of the plurality of inlets may be provided. For example, a switching door that adjusts the open / closed state of the first air port 120 and adjusts the open / closed state of the outside air port 130 may be employed.

It is a schematic diagram which shows the vehicle air conditioner in 1st Embodiment of this invention. It is a schematic diagram which shows the vehicle air conditioner in 1st Embodiment. (In shy mode) It is a schematic diagram which shows the vehicle air conditioner in 1st Embodiment. (In air / outside air 2-layer mode) It is a schematic diagram which shows the vehicle air conditioner in other embodiment. (In air / outside air 2-layer mode)

Explanation of symbols

  DESCRIPTION OF SYMBOLS 101 ... Compressor, 102 ... Condenser, 103 ... Expansion valve, 104 ... Evaporator, 105 ... Engine, 106 ... Water pump, 107 ... Thermostat, 108 ... Radiator, 109 ... Heater core, 110 ... Blower, 111 ... Air conditioning case, 112 ... Refrigeration cycle, 113 ... Cooling water circuit, 120 ... first inside air port, 121 ... first inside air door, 130 ... outside air port, 131 ... outside air door, 140 ... second inside air port, 141 ... second inside air door, 141a ... first 1 door part, 141b ... 2nd door part, 142 ... 1st partition door, 143 ... 2nd air blower, 144 ... Outside air passage, 145 ... Inside air passage.

Claims (4)

An air conditioning case (111) through which the conditioned air circulates;
A cooling heat exchanger (104) disposed in the air conditioning case (111) for cooling the conditioned air;
A heating device (109) that is disposed downstream of the cooling heat exchanger (104) in the air-conditioning case (111), and that heats the air-conditioned air;
First and second blowers (110, 143) that are arranged on the upstream side of the conditioned air flow from the heating device (109) in the air conditioning case (111) and blow the conditioned air into the vehicle compartment,
A first interior vent (120) provided in the air conditioning case (111) for introducing air in the vehicle compartment;
An air outlet (130) provided in the air conditioning case (111) for introducing air outside the vehicle compartment;
A first air outlet (150, 160) which is provided in the air conditioning case (111) and blows out the conditioned air to a windshield;
A vehicle air conditioner that is provided in the air conditioning case (111) and has a second air outlet (170) that blows out the conditioned air to the feet of a passenger,
Provided in the air conditioning case (111) downstream of the conditioned air flow from the cooling heat exchanger (104) and the first blower (110) and upstream of the conditioned air flow from the heating device (109). A second air inlet (140) for introducing air in the vehicle compartment;
Opening and closing means (121, 131, 141) for opening and closing the first inside mouth (120), the outside mouth (130), and the second inside mouth (140),
Air outside the vehicle compartment introduced from the outside air port (130) by the first air blower (110) is transferred to the first air outlet (104) via the cooling heat exchanger (104) and the heating device (109). 150, 160) and the outside air passage (144) leading to the second interior air port (140) by the second blower (143) through the heating device (109) Partitioning means (141, 142, 246, 247, 248, 249) capable of forming an internal air passage (145) leading to the second outlet (170),
By the opening / closing means (121, 131, 141), the first inside air port (120) is closed, the outside air port (130) and the second inside air port (140) are opened, and the partitioning means (141, 142, 246) are opened. 247, 248, 249), the inside / outside air two-layer mode that forms the outside air passage (144) and the inside air passage (145) can be set,
The vehicle air conditioner is configured to operate the first blower (110) and the second blower (143) in the inside / outside air two-layer mode. The opening / closing means (121, 131, 141) includes a first inside air opening / closing means (121) for opening and closing the first inside air mouth (120), an outside air opening / closing means (131) for opening and closing the outside air mouth (130), A second inside air opening / closing means (141) for opening and closing the second inside air mouth (140),
The partition means (141, 142) is the second inside air opening / closing means (141), and is an inside air door (rotating around the opening end on the upstream side of the conditioned air flow in the second inside air port (140) ( 141) and a partition door (142) that is provided downstream of the heating device (109) in the air-conditioning air flow direction and rotates about the side wall surface (111a) of the air-conditioning case (111),
The inside air door (141) is rotated to a position where the second inside air port (140) is opened, and the partition door (142) is moved to the front end of the inside air door (141) and the front end of the partition door (142). And the inside air passage (145) and the outside air passage (144) are formed by rotating them to positions facing each other across the heating device (109). Air conditioner. The inside air door (141) includes a first door portion (141a) that rotates around the opening end of the second inside air port (140) on the upstream side of the conditioned air flow, and a first door portion (141a). A second door portion (141b) that rotates about the tip as a rotation center,
The first door part (141a) is rotated to a position where the second inside air port (140) is closed, and the second door part (141b) is moved to the main surface of the first door part (141a) and the By rotating the second door portion (141b) to a position facing the main surface, the second interior air port (140) is closed,
Further, the first door part (141a) is rotated to a position where the second inside air port (140) is in an open state, and the second door part (141b) is rotated to the main surface of the first door part (141a). And the inside air passage (145) and the outside air passage (144) are formed by rotating to a position where a main surface of the second door portion (141b) is continuous. Item 4. The vehicle heat exchanger according to Item 3.   The vehicle air conditioner according to any one of claims 1 to 3, wherein the second inside air port (140) is provided on a lower side of the air conditioning case (111).

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