JP2013035484A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle, performing dehumidification during heating by suppressing power consumption of a heating means for regeneration.SOLUTION: Outside air having passed through a sensible heat exchanger 30 and inside air dehumidified by a dehumidifier 24 are mixed, and heated by a second cabin heat exchanger 9, at least a part of thus heated air is caused to flow in a regeneration air passage 28 by a second air passage switching means 10 and passes through a regeneration part 25. The heat of the air having passed through the regeneration part 25 is recovered to air to be diffused to the cabin, using a sensible heat exchanger 30, and thus dehumidification heating is performed. As a result, another heating means is not required by using a part of the heated dehumidified air for heating the cabin is used for regeneration of a dehumidification means 26, and since the dehumidified air is used for regeneration of the dehumidification means 26, the regeneration is possible at lower temperature compared with the non-dehumidified air, and power consumption of a heat pump is reduced. Moreover, heat is recovered from the air exhausted to outside to air to be diffused into the cabin, heating load of the second cabin heat exchanger 9 is reduced.

Description

  The present invention relates to a vehicle air conditioner that can heat a vehicle interior.

  2. Description of the Related Art Conventionally, the heating of gasoline vehicles uses the waste heat of the engine as the mainstream, and a dehumidifying device for preventing fogging of windows and the like, which is a problem during heating, has been devised (for example, see Patent Document 1).

  As shown in FIG. 7, this dehumidifier is configured as a vehicle dehumidifier, and is installed in the trunk room at the rear of the passenger compartment independently of the ventilation system of the air conditioner. The suction port 102 communicates with the rear portion of the vehicle interior through an opening (not shown) of a rear passage tray at the rear of the vehicle interior.

  A blower 103 is disposed below the suction port 102. The blower 103 has a well-known centrifugal multiblade fan 103a and a scroll case 103b in which the centrifugal multiblade fan 103a is rotatably accommodated, and a case 104 is connected to the air outlet portion. The ventilation path inside the case 104 is partitioned by a partition plate 105 into a first ventilation path 106 for dehumidification and a second ventilation path 107 for regeneration.

  A first sensible heat exchanger 108 for exchanging heat between the indoor air in the first ventilation path 106 as a cooling means and the low temperature outside air is disposed at the inlet of the first ventilation path 106 for dehumidification. ing. A desiccant unit 109 having a desiccant is disposed downstream of the first sensible heat exchanger 108, and a second sensible heat exchanger 110 is disposed downstream thereof.

  For this reason, the first sensible heat exchanger 108 is connected to the outside air passage 111, and one end 111a of the outside air passage 111 opens to the outside of the passenger compartment, and sucks low temperature outside air during heating in winter. Further, the other end portion side of the outside air passage 111 communicates with the negative pressure portion of the centrifugal multiblade fan 103a through an auxiliary suction port 112 formed on the outer peripheral side of the motor 103c of the blower 103. Thereby, when the centrifugal multiblade fan 103a is rotationally driven, the low temperature outside air flows toward the negative pressure portion of the centrifugal multiblade fan 103a through the outside air passage 111 and the first sensible heat exchanger.

  The desiccant unit 109 is installed not only in the first ventilation path 106 for dehumidification but also in the second ventilation path 107 for regeneration, and the case body 109b is driven to rotate by driving means such as a motor (not shown). Yes. In addition, in the second ventilation path 107 for regeneration, an electric heating element 113 is installed on the upstream side of the desiccant unit 109, and the second sensible heat exchanger 110 is heated by the high-temperature air in the second ventilation path 107 for regeneration. The air in the first ventilation path 106 for dehumidification is heated. In the first ventilation path 106 for dehumidification, an outlet 114 to the vehicle interior is provided on the downstream side of the second sensible heat exchanger 110, and the outlet 115 of the regenerated air from the second sensible heat exchanger 110 is outside the vehicle interior. Is open.

  As described above, this vehicle dehumidifier is independent of the ventilation system of the air conditioner, and heating means for heating is installed in the ventilation system of the air conditioner separately from the electric heating element 113 for regeneration. Has been.

JP 2000-108655 A

  In such a vehicle dehumidifier, air that is a mixture of inside air and outside air is used as the regeneration air. Therefore, heating means must be installed in the regeneration second ventilation path to heat the regeneration air to a high temperature. Therefore, there is a problem that power consumption for that purpose increases.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a vehicle air conditioner capable of dehumidifying during heating while suppressing power consumption of a heating means for regeneration.

  In order to achieve this object, the present invention provides an outside intake air passage from an outside air introduction port through which outside air is introduced to an air conditioning outlet that blows out conditioned air into the vehicle, and the outside air in the outside intake air passage. In order from the inlet side, first air path switching means for switching the upstream air flow blown into the vehicle, air blowing means for generating an air flow from the outside air inlet to the air conditioning outlet, and air blown into the vehicle The first in-vehicle heat exchanger and the second in-vehicle heat exchanger for cooling or heating, the second air path switching means for switching the downstream air flow blown into the vehicle, and the first air from the inside air introduction port for introducing the inside air An in-vehicle intake air path connected to the air path switching means, and a dehumidifying air path branched from the inside air inlet and the first air path switching means and connected to the first air path switching means And a third in-vehicle heat exchanger for cooling the air in the dehumidifying air passage A regenerative air passage that branches off from the second air passage switching means and connects at least a part of the air blown out by the air blowing means to the outside of the vehicle, and the third air passage in the dehumidifying air passage. A dehumidifying unit between the in-vehicle heat exchanger and the first air path switching unit, a dehumidifying unit having a regenerating unit in the regeneration air path, an in-vehicle heat exchanger for exchanging heat between the outside air and the refrigerant, and compressing the refrigerant A compressor, decompression means for expanding and reducing the refrigerant, the first in-vehicle heat exchanger, the second in-vehicle heat exchanger, the third in-vehicle heat exchanger, the outside heat exchanger, the compressor, and A heat pump that circulates refrigerant between the decompression means, and is branched from between the outside air intake and the first air path switching means and connected to the first air path switching means The heat recovery air path, the heat recovery air path and the regenerator downstream of the regeneration unit. A sensible heat exchanger is disposed at the intersection with the air passage, and heat is recovered from the air in the regeneration air passage to the air blown into the vehicle to perform dehumidification heating, thereby achieving the intended purpose. Is.

  According to the present invention, by using a part of air heated and dehumidified for heating in the vehicle for regeneration of the dehumidifying means, it is not necessary to provide another heating means for regeneration of the dehumidifying means, and the dehumidified air is removed. Since air is used for regeneration of the dehumidifying means, it is possible to regenerate at a lower temperature than air that is not dehumidified, reducing the power consumption of the heat pump, and providing an energy-saving vehicle air conditioner. Can be obtained.

  Furthermore, by disposing a sensible heat exchanger at the intersection of the portion of the regeneration air passage downstream of the regeneration portion and the heat recovery air passage, it passes through the regeneration air passage and through the regeneration portion to the outside of the vehicle. Since heat can be recovered from the blown air to the air blown into the vehicle through the heat recovery air passage, the heating load of the second in-vehicle heat exchanger can be reduced, and the vehicle air conditioner has an energy saving effect Can be provided.

FIG. 1 is an air path configuration diagram of the vehicle air conditioner according to the first embodiment of the present invention. Airway configuration diagram of the dehumidifying and heating operation Freezing prevention mode air passage configuration diagram during operation in the same dehumidifying heating mode Airway configuration diagram for cooling operation Airway configuration diagram of vehicle air conditioner of Embodiment 2 of the present invention Airway configuration diagram of the dehumidifying and heating operation Schematic configuration diagram of a conventional vehicle dehumidifier

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is an air path configuration diagram of the vehicle air conditioner according to Embodiment 1 of the present invention during a dehumidifying heating operation. As shown in FIG. 1, the vehicle air conditioner includes an air conditioning system and a dehumidifying system.

  In the air conditioning system, there are an air intake passage 3 from the outside air inlet 1 for introducing outside air from the outside of the vehicle to the air conditioning outlet 2 for blowing the conditioned air into the vehicle, and an inside air introduction port 4 for introducing the inside air from the inside of the vehicle. An in-vehicle intake air passage 5 extending to the air conditioning outlet 2 is provided. The outside intake air passage 3 and the inside intake air passage 5 are the same air passage from the first air passage switching means 6 to the air conditioning outlet 2. Here, this same portion is representatively referred to as an outside air intake air passage 3.

  In the outside air intake air passage 3, the first air passage switching means 6 that switches the upstream air blown out into the vehicle in order from the outside air inlet 1 side, and the air flow from the outside air inlet 1 to the air conditioning outlet 2. Blowing means 7 to be generated, first in-vehicle heat exchanger 8 and second in-vehicle heat exchanger 9 for cooling or heating the air blown into the vehicle, second air path switching means for switching the downstream air flow blown into the vehicle 10 is arranged, and between the first in-vehicle heat exchanger 8 and the second in-vehicle heat exchanger 9, a temperature adjusting means 11 for adjusting the temperature by adjusting the amount of air passing through the second in-vehicle heat exchanger 9 is arranged. doing. Further, a third in-vehicle heat exchanger 13 for cooling the air in the dehumidifying air passage 12 is disposed in the dehumidifying air passage 12 described later. The first in-vehicle heat exchanger 8, the second in-vehicle heat exchanger 9, and the third in-vehicle heat exchanger 13 form part of the heat pump cycle described below, and are blown into the vehicle interior by the action of the heat pump cycle. The air to be cooled or heated. Further, an outside heat exchanger 14 that performs heat exchange between the outside air and the refrigerant, and an outside air blowing means 15 that blows outside air to the outside heat exchanger 14 are arranged outside the vehicle interior.

  The heat pump cycle includes a compressor 16 that compresses the refrigerant, a decompression unit that expands and decompresses the refrigerant, a four-way valve 17 that switches the flow direction of the refrigerant, a first in-vehicle heat exchanger 8, and a second in-vehicle heat exchanger 9. The third in-vehicle heat exchanger 13 and the out-of-vehicle heat exchanger 14 and the refrigerant pipe for circulating the refrigerant between them. Further, a four-way valve 17 on the high-pressure refrigerant discharge side of the compressor 16, and a check valve 18 that restricts the flow of refrigerant in one direction between the four-way valve 17 and the vehicle exterior heat exchanger 14, are arranged in the third vehicle interior heat exchanger 13. A throttle valve 19 (a built-in expansion valve 19a and an electromagnetic valve 19b as shown in the figure), a second in-vehicle heat exchanger 9 and an outside heat exchanger 14 between the first and second in-vehicle heat exchangers 8 Between the check valve 20 and the throttle valve 21 as a pressure reducing means (with an expansion valve 21a and a solenoid valve 21b as shown in the figure), and between the outside heat exchanger 14 and the third inside heat exchanger 13 are branched. An electromagnetic valve 31 connected between the third in-vehicle heat exchanger 13 and the throttle valve 19 is disposed.

  The inside air introduction port 4 has an inside air temperature / humidity sensor 22 as an inside air temperature / humidity detecting means for detecting the air temperature and humidity inside the vehicle, and the outside air introduction port 1 has an outside air temperature for detecting the air temperature and humidity outside the vehicle. An outside air temperature / humidity sensor 23 is provided as a humidity detecting means.

  The temperature adjusting means 11 adjusts the temperature by adjusting the amount of air passing through the second in-vehicle heat exchanger 9 by means of a damper mechanism, and between the first in-vehicle heat exchanger 8 and the second in-vehicle heat exchanger 9. Is arranged.

  An air conditioning system is configured by the configuration described above.

  On the other hand, the dehumidifying system includes a dehumidifying means 26 having a dehumidifying part 24 and a regenerating part 25 described later for dehumidifying the inside air, and an inside air inlet 4 of the vehicle intake air path 5 and the first air path switching means 6. Dehumidifying air path 12 branched from the first air path switching means 6, third in-vehicle heat exchanger 13 exchanging heat as a condenser in the dehumidifying air path 12, and second air path switching The regenerative air passage is branched from the means 10 and connected to the outside air outlet 27.

  A dehumidifying part 24 of the dehumidifying means 26 is arranged between the third in-vehicle heat exchanger 13 in the dehumidifying air path 12 and the first air path switching means 6, and the regeneration of the dehumidifying means 26 is performed in the regeneration air path 28. Part 25 is arranged.

  The dehumidifying means 26 includes a moisture absorbing material, and includes a dehumidifying unit 24 that dehumidifies the air that passes by absorbing moisture to the moisture absorbing material, and a regeneration unit 25 that regenerates the moisture absorbing material by releasing moisture from the moisture absorbing material to the passing air. Has been.

  In addition, a heat recovery air passage 29 that branches from between the outside air inlet 1 of the outside air intake air passage 3 and the first air passage switching means 6 and is connected to the first air passage switching means 6 is provided. A sensible heat exchanger 30 is provided at the intersection of the portion of the air passage 28 downstream from the regeneration portion 25, that is, the portion of the regeneration air passage 28 extending from the regeneration portion 25 to the vehicle outlet 27 and the heat recovery air passage 29 described above. Is arranged.

  In addition, control means (not shown) for switching the air conditioning of the air conditioner according to the temperature and humidity detected by the inside air temperature and humidity sensor 22 and the outside air temperature and humidity sensor 23 is provided so as to operate at a predetermined temperature or temperature and humidity set in advance. It is the structure which performs control.

  Moreover, the 1st air path switching means 6 and the 2nd air path switching means 10 are comprised by the motor which opens and closes a damper mechanism in the opening part of each connected air path. The damper is opened and closed by a signal transmitted from the control means, and the combination of the air paths to be communicated is controlled.

  In the above-described configuration, the operation will be described with reference to FIGS. In this configuration, the dehumidifying and heating operation refers to an operation that performs heating while dehumidifying by the action of the dehumidifying means 26, and the heating operation refers to an operation that performs heating without causing the dehumidifying means 26 to act.

  First, the operation during the dehumidifying and heating operation will be described with reference to FIG. During the dehumidifying heating operation, the operation of the first air path switching means 6 dehumidifies the air path from the outside air inlet 1 through the heat recovery air path 29 to the first air path switching means 6 and the inside air inlet 4. An air path that reaches the first air path switching means 6 through the air path 12 is formed. By the operation of the air blowing means 7, the outside air and the inside air are mixed from these air paths through the first air path switching means 6 and sucked into the air blowing means 7.

  At this time, the inside air passing through the dehumidifying air passage 12 is cooled by exchanging heat with the refrigerant in the third in-vehicle heat exchanger 13, and the relative humidity increases. On the other hand, the refrigerant in the third in-vehicle heat exchanger 13 absorbs heat from the inside air.

  The inside air whose relative humidity has been increased by being cooled by the third in-vehicle heat exchanger 13 is blown to the dehumidifying section 24 of the dehumidifying means 26, and is dehumidified by the dehumidifying section 24 and dried. As the dehumidifying means 26 dehumidifies, the moisture adsorption heat of the hygroscopic material is received and heated to increase its temperature.

  At this time, the outside air passing through the heat recovery air passage 29 and the air blown out of the vehicle through the regeneration air passage 28 described later are heat-exchanged by the action of the sensible heat exchanger 30, and the outside air passing through the heat recovery air passage 29. Temperature rises.

  The inside air that has been dried and has risen in temperature through the dehumidifying unit 24 and the outside air that has passed through the sensible heat exchanger 30 and has been raised in temperature are mixed through the first air path switching unit 6 and sucked into the blowing unit 7.

  At this time, in the heat pump cycle, the refrigerant is controlled by the control means in the compressor 16, the four-way valve 17, the second in-vehicle heat exchanger 9, the throttle valve 21, the check valve 20, the outside heat exchanger 14, and the third in-vehicle heat exchanger 13. The second in-vehicle heat exchanger 9 operates as a condenser, the outside heat exchanger 14 and the third in-vehicle heat exchanger 13 function as an evaporator. Further, no refrigerant flows through the first in-vehicle heat exchanger 8. Further, the outside air blowing means 15 is activated and the outside air and the refrigerant exchange heat with the outside heat exchanger 14.

  When the second in-vehicle heat exchanger 9 acts as a condenser, a part or all of the air discharged from the air blowing means 7 is heated by the second in-vehicle heat exchanger 9 by the temperature adjusting means 11, and the desired air is discharged. The temperature is adjusted and the air is sent to the second air path switching means 10.

  A part of the air blown to the second air path switching means 10 is distributed to the dehumidifying air path 12 by the operation of the second air path switching means 10, and the rest is supplied from the air conditioning outlet 2 to various locations in the vehicle. For example, it is distributed to windows, faces, and feet.

  The heated air sent to the regeneration air passage 28 is sent to the regeneration unit 25 of the dehumidifying means 26. In the regeneration unit 25, the moisture absorbing material of the dehumidifying means 26 receives heat from the air in the regeneration air passage 28 and releases moisture into the air. In this way, the dehumidifying means 26 is regenerated. Further, due to the action of the sensible heat exchanger 30 disposed at the intersection of the regeneration air passage 28 and the heat recovery air passage 29 described above, air passing through the regeneration air passage 28 and outside air passing through the heat recovery air passage 29 are generated. Heat exchanged.

  Here, in the configuration of the present invention, air that has been dehumidified and heated for heating inside the vehicle is distributed to the regeneration air passage 28 by the second air passage switching means 10, and this air is used for regeneration of the dehumidification means 26. ing.

  With this configuration, it is not necessary to provide another heating means for regeneration, and regeneration is performed using a part of the dehumidified air, so that the relative humidity is increased to lower it to a value necessary for regeneration. Since the temperature of the air to be heated can be made lower than that of the air that has not been dehumidified, the power consumption of the heat pump can be suppressed, and an air conditioner for vehicles with an energy saving effect can be provided.

  In the configuration of the present invention, the sensible heat exchanger 30 is disposed at the intersection of the heat recovery air passage 29 and the regeneration air passage 28 downstream from the regeneration portion 25.

  With this configuration, heat can be recovered from the air blown out of the vehicle through the regeneration air passage 28 through the regeneration unit 25 to the air blown out through the heat recovery air passage 29 into the vehicle. The heating load of the in-vehicle heat exchanger 9 can be reduced, and a vehicle air conditioner having an energy saving effect can be provided.

  A third in-vehicle heat exchanger 13 is disposed between the dehumidifying means 26 in the dehumidifying air passage 12 and the outside air outlet 27, and the air in the dehumidifying air passage 12 is cooled and dehumidified by the third in-vehicle heat exchanger 13. Then, it is configured to flow to the dehumidifying means 26.

  With this configuration, the inside air in the dehumidifying air passage 12 is cooled by the third in-vehicle heat exchanger 13 and the relative humidity increases, so that moisture is easily absorbed by the moisture absorbing material of the dehumidifying means 26. For this reason, the relative humidity can be increased when dehumidification is performed after mixing the inside air and the outside air, or when the inside air is dehumidified without cooling, so that more water can be dehumidified.

  Further, when the inside air is cooled to the dew point or lower by the third in-vehicle heat exchanger 13, it is possible to perform dehumidification and dehumidification in the third in-vehicle heat exchanger 13 as well, compared with the dehumidifying action only by the dehumidifying means 26. A vehicle air conditioner having a high dehumidifying effect can be provided.

  In addition, when the outside air temperature is below the freezing point, the heat absorption from the outside air to the refrigerant by the outside heat exchanger 14 tends to be insufficient, but the third inside heat exchanger 13 can absorb the heat from the inside air passing through the dehumidifying air passage 12, so the shortage It is possible to continue the heat pump cycle by supplementing the endothermic heat.

  Next, the operation in the case where the outside air temperature is below freezing point and the temperature is very low as compared with the in-vehicle temperature, such as use in an extremely cold region, will be described with reference to FIG. In this case, the sensible heat exchanger 30 may freeze during the dehumidifying heating operation. In the present embodiment, when the outside air temperature / humidity sensor 23 and the inside air temperature / humidity sensor 22 detect a temperature and humidity below a predetermined value, the anti-freezing mode of the dehumidifying heating operation is set, and the first air path switching means 6 is controlled by the control means. Switches the air path for introducing outside air from the heat recovery air path 29 to the outside air intake air path 3. Further, the air exhausted outside the vehicle through the regeneration air passage 28 passes through the sensible heat exchanger 30 as it is. If changed in this way, the air introduced into the sensible heat exchanger 30 becomes only the air passing through the regenerative air passage 28, and the outside air is not introduced. Therefore, the temperature of the sensible heat exchanger 30 rises and the surface is iced. It becomes difficult to melt or even if ice adheres, it can be melted. Therefore, since freezing of the sensible heat exchanger 30 can be suppressed, continuous dehumidifying heating can be performed even in a very cold region.

  Next, the operation when the outside air temperature is higher than the inside air temperature, such as in summer, will be described with reference to FIG. When the outside air temperature / humidity sensor 23 and the inside air temperature / humidity sensor 22 detect that the outside air temperature is higher than the inside air temperature, the operation is switched to the cooling operation.

  When switching to the cooling operation, the first air passage switching means 6 operates, the air passage from the outside air introduction port 1 through the outside intake air passage 3 to the first air passage switching means 6, and the inside air introduction port 4 To the first air passage switching means 6 through the in-vehicle intake air passage 5 is formed. Further, the second air path switching means 10 operates, and the communication with the regeneration air path 28 is blocked.

  When the air blowing means 7 starts operation, the outside air and the inside air are mixed through these air paths and the first air path switching means 6 and sucked into the air blowing means 7.

  At this time, in the heat pump cycle, the electromagnetic valve 31 is opened by the control means, and the refrigerant is the compressor 16, the four-way valve 17, the check valve 18, the external heat exchanger 14, the electromagnetic valve 31, the throttle valve 19, and the first in-vehicle heat exchange. The external heat exchanger 14 functions as a condenser, and the first in-vehicle heat exchanger 8 functions as an evaporator. At this time, no refrigerant flows through the second in-vehicle heat exchanger 9 and the third in-vehicle heat exchanger 13. In addition, the outside air blowing means 15 is operated, and the outside heat exchanger 14 radiates the refrigerant to the outside air.

  When the first in-vehicle heat exchanger 8 acts as an evaporator, the air blown out from the blowing means 7 is cooled by the first in-vehicle heat exchanger 8 and is blown to the second air path switching means 10.

  In the second air path switching means 10, since the regenerative air path 28 is blocked, the cooled air is blown to the air conditioning outlet 2 and blown out to various locations in the vehicle to perform a cooling operation.

  As described above, according to the configuration and operation of the first embodiment of the present invention, a part of the air heated and dehumidified for heating in the vehicle is used for the regeneration of the dehumidifying means 26, so that the dehumidifying means 26 There is no need to provide separate heating means for regeneration. Further, since the dehumidified air is used for the regeneration of the dehumidifying means 26, it is possible to regenerate at a lower temperature than the air that is not dehumidified, thereby suppressing the power consumption of the heat pump and providing a vehicle air conditioner having an energy saving effect. The effect that can be obtained.

(Embodiment 2)
FIG. 5 is an air path configuration diagram during the dehumidifying and heating operation of the vehicle air conditioner according to the second embodiment of the present invention. Hereinafter, the configuration will be described with reference to FIG. 5 and FIG. 6, but detailed description of the same configuration and the same operation as those of the first embodiment will be omitted.

  Prior to the description, in the present embodiment, a portion of the outside intake air passage 3 having the same configuration as that of the first embodiment that communicates the first air passage switching means 6 and the temperature adjusting means 11 is a mixed air passage. It will be called 32.

  As shown in FIG. 5, in the present embodiment, the regeneration air passage 28 downstream of the regeneration portion 25, that is, the portion of the regeneration air passage 28 that is connected from the regeneration portion 25 to the vehicle outlet 27 is mixed. A sensible heat exchanger 30 is arranged at the intersection with the air passage 32. The other components are the same as the first embodiment and the same operation.

  The operation of the configuration of the second embodiment described above will be described with reference to FIG. As shown in FIG. 6, during the heating operation, by the operation of the first air path switching means 6, the air path from the outside air inlet 1 through the outside air intake air path 3 to the first air path switching means 6, An air passage is formed from the inside air inlet 4 through the dehumidifying air passage 12 to the first air passage switching means 6. Due to the operation of the air blowing means 7, the outside air and the inside air are mixed from these air passages via the first air passage switching means 6, passed through the mixed air passage 32 and sucked into the air blowing means 7 via the sensible heat exchanger 30. The

  A part or all of the air blown out from the air blowing means 7 is heated by the temperature adjusting means 11 by the second in-vehicle heat exchanger 9, adjusted to a desired temperature, and blown to the second air path switching means 10. . The air blown to the second air path switching means 10 is divided into air blown to the regeneration air path 28 and air blown from the air conditioning outlet 2 by the action of the second air path switching means 10. The

  The heated air sent to the regeneration air passage 28 is sent to the regeneration unit 25 of the dehumidifying means 26. In the regeneration unit 25, the moisture absorbing material of the dehumidifying means 26 receives heat from the air in the regeneration air passage 28 and releases moisture into the air by the same operation as in the first embodiment. The air that has passed through the dehumidifying means 26 and has regenerated the hygroscopic material is blown out of the vehicle through the sensible heat exchanger 30.

  Here, in the configuration according to the second embodiment, the sensible heat exchanger 30 is disposed at the intersection of the regeneration air path 28 and the mixed air path 32 on the downstream side of the regeneration unit 25 and passes through the regeneration air path 28 to the outside of the vehicle. Heat is recovered from the blown air to the air blown into the vehicle through the mixed air passage 32.

  With such a configuration, the outside air temperature during heating is below freezing, such as when used in a very cold region, the outside air temperature is very low compared to the inside air temperature, and the sensible heat exchanger 30 is operated during the dehumidifying heating operation. Even in the case where there is a possibility of freezing, the first air path switching means 6 performs heat exchange between the mixed air that has been heated by mixing the inside air with the outside air and the air in the regenerative air path 28, so The air temperature of the regeneration air passage 28 in the heat exchanger 30 can be set to the freezing temperature or higher. Therefore, since heat recovery can be performed while suppressing freezing inside the sensible heat exchanger 30 even in an extremely cold region, the vehicle having an energy saving effect by suppressing the heating load of the second in-vehicle heat exchanger 9 An air conditioner can be provided.

  The vehicle air conditioner according to the present invention uses part of the air heated and dehumidified for heating in the vehicle for regeneration of the dehumidifying means, and can recover heat from the exhaust to the outside of the vehicle. Therefore, it is useful as an air conditioner for vehicles used in electric vehicles, hybrid vehicles, and the like, in which the power consumption of the heat pump is suppressed and has an energy saving effect, and it is difficult to obtain a heat source for heating.

DESCRIPTION OF SYMBOLS 1 Outside air introduction port 2 Air-conditioning blower outlet 3 Outside air intake passage 4 Inside air introduction port 5 Inside air intake passage 6 First air passage switching means 7 Air blow means 8 First in-vehicle heat exchanger 9 Second in-vehicle heat exchanger 10 Second Air path switching means 12 Dehumidifying air path 13 Third in-vehicle heat exchanger 14 Outside heat exchanger 16 Compressor 19 Throttle valve 21 Throttle valve 24 Dehumidifying section 25 Regenerating section 26 Dehumidifying section 27 Outlet outlet 28 Regenerating air path 29 Heat recovery Air passage 30 Sensible heat exchanger 32 Mixed air passage

Claims (2)

An outside air intake air passage from an outside air inlet that introduces outside air to an air conditioning outlet that blows out the conditioned air into the vehicle;
In this outside air intake air passage, in order from the outside air inlet side,
First air path switching means for switching the upstream air flow blown into the vehicle;
Blower means for generating an air flow from the outside air inlet to the air conditioning outlet,
A first in-vehicle heat exchanger and a second in-vehicle heat exchanger for cooling or heating the air blown into the vehicle,
Comprising a second air path switching means for switching the downstream air flow blown into the vehicle,
An in-vehicle intake air passage connected to the first air passage switching means from an inside air introduction port for introducing inside air;
A dehumidifying air passage branched from between the inside air inlet and the first air passage switching means and connected to the first air passage switching means;
A third in-vehicle heat exchanger for cooling the air in the dehumidifying air passage;
A regenerative air passage that branches from the second air passage switching means and connects an outside air outlet that blows out at least part of the air blown out by the air blowing means to the outside of the vehicle;
A dehumidifying unit between the third in-vehicle heat exchanger in the dehumidifying air path and the first air path switching unit, and a dehumidifying unit having a regenerating unit in the regenerating air path;
An external heat exchanger for exchanging heat between the outside air and the refrigerant;
A compressor for compressing the refrigerant;
Decompression means for expanding the refrigerant to reduce the pressure;
A heat pump for circulating refrigerant between the first in-vehicle heat exchanger, the second in-vehicle heat exchanger, the third in-vehicle heat exchanger, the out-of-vehicle heat exchanger, the compressor, and the pressure reducing means. And
A heat recovery air passage branched from the outside air inlet and the first air passage switching means and connected to the first air passage switching means;
A sensible heat exchanger is arranged at the intersection of the heat recovery air passage and the regeneration air passage downstream from the regeneration portion,
A vehicle air conditioner that recovers heat from air in the regeneration air passage to air blown into the vehicle and performs dehumidification heating. An outside air intake air passage from an outside air inlet that introduces outside air to an air conditioning outlet that blows out the conditioned air into the vehicle;
In this outside air intake air passage, in order from the outside air inlet side,
First air path switching means for switching the upstream air flow blown into the vehicle;
Blower means for generating an air flow from the outside air inlet to the air conditioning outlet,
A first in-vehicle heat exchanger and a second in-vehicle heat exchanger for cooling or heating the air blown into the vehicle,
Comprising a second air path switching means for switching the downstream air flow blown into the vehicle,
An in-vehicle intake air passage connected to the first air passage switching means from an inside air introduction port for introducing inside air;
A dehumidifying air passage branched from between the inside air inlet and the first air passage switching means and connected to the first air passage switching means;
A third in-vehicle heat exchanger for cooling the air in the dehumidifying air passage;
A regenerative air passage that branches from the second air passage switching means and connects an outside air outlet that blows out at least part of the air blown out by the air blowing means to the outside of the vehicle;
A dehumidifying unit between the third in-vehicle heat exchanger in the dehumidifying air path and the first air path switching unit, and a dehumidifying unit having a regenerating unit in the regenerating air path;
An external heat exchanger for exchanging heat between the outside air and the refrigerant;
A compressor for compressing the refrigerant;
Decompression means for expanding the refrigerant to reduce the pressure;
A heat pump for circulating refrigerant between the first in-vehicle heat exchanger, the second in-vehicle heat exchanger, the third in-vehicle heat exchanger, the out-of-vehicle heat exchanger, the compressor, and the pressure reducing means. And
Comprising a mixed air passage communicating the first air passage switching means and the temperature adjusting means;
A sensible heat exchanger is disposed at the intersection of the regenerative air passage downstream of the regenerator and the mixed air passage, and the air blown out of the vehicle through the regenerative air passage is blown into the vehicle through the mixed air passage. A vehicle air conditioner that recovers heat to air to be discharged and performs dehumidification heating.

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