JP2013014306A - Vehicle air conditioner - Google Patents

Abstract

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.
SOLUTION: The outside air that has passed through a precooling heat exchanger 27 and the inside air that has been dehumidified by a dehumidifying section 24 are mixed, and a part of the mixed air heated by a first in-vehicle heat exchanger 8 is converted into second air path switching means. 10, the mixed air after flowing into the regeneration air passage 12 and passing through the regeneration unit 25 is dehumidified by the third in-vehicle heat exchanger 13 that exchanges heat as an evaporator, and then returned to the interior of the vehicle to perform dehumidification heating. Therefore, a part of the air heated and dehumidified for heating the inside of the vehicle is used for the regeneration of the dehumidifying means 26, so that another heating means may not be provided, and the dehumidified air is used for the regeneration of the dehumidifying means 26. Therefore, it can be regenerated at a lower temperature than air without dehumidification, and the power consumption of the heat pump can be suppressed. Moreover, since steam latent heat is collect | recovered with the 3rd in-vehicle heat exchanger 13 from the mixed air after passing the reproduction | regeneration part 25, the heating load of a heat pump can be reduced.
[Selection] Figure 1

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 is open 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. Thus, when the centrifugal multiblade fan 103a is rotationally driven, low-temperature outside air flows through the outside air passage 111 and the first sensible heat exchanger 108 toward the negative pressure portion of the centrifugal multiblade fan 103a.

  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 passage 107 for regeneration, an electric heating element 113 is installed upstream of the desiccant unit 109, and the second sensible heat exchanger 110 is heated by the high-temperature air in the second ventilation passage 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 passenger compartment is provided downstream of the second sensible heat exchanger 110, and an outlet 115 for the regeneration air from the second sensible heat exchanger 110 is located outside the passenger compartment. 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 second ventilation passage for regeneration 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 air intake air passage that extends from an outside air introduction port that introduces outside air to an air conditioning air outlet that blows out air conditioned air into the vehicle, and the outside air introduction port in the outside air intake air passage. In order from the 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, cooling the air blown into the vehicle or The first in-vehicle heat exchanger and the second in-vehicle heat exchanger for heating, the second air path switching means for switching the downstream air flow blown out into the vehicle, and the first wind from the inside air introduction port for introducing the inside air An in-vehicle intake air path connected to the path switching means, a dehumidification air path branched from between the inside air inlet and the first air path switching means and connected to the first air path switching means, A regenerative blower for blowing inside air into the vehicle from the second air path switching means. A dehumidifying unit having a regenerating air path over the mouth and a dehumidifying unit upstream of the first air channel switching unit in the dehumidifying air channel and a regenerating unit in the regenerating air channel is provided, and heat exchange is performed between the outside air and the refrigerant. A vehicle exterior heat exchanger, a compressor that compresses the refrigerant, a decompression means that expands and decompresses the refrigerant, the first vehicle interior heat exchanger, the second vehicle interior heat exchanger, the vehicle exterior heat exchanger, and the compression And a heat pump that circulates the refrigerant between the decompression means and the outside air introduced from the outside air introduction port by the first air path switching means in the heating operation when the outside air is introduced. A part of the mixed air mixed with the inside air dehumidified by the dehumidifying section is caused to flow into the regenerating air path by the second air path switching means, and the dehumidifying heating operation is performed.

  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, regeneration at a lower temperature is possible as compared with air that is not dehumidified, and it is possible to provide a vehicle air conditioner that has an energy saving effect while suppressing power consumption of the heat pump.

  Further, by recovering the latent heat of water vapor from the mixed air after passing through the regeneration unit of the dehumidifying means in the third in-vehicle heat exchanger, the heating capacity of the second in-vehicle heat exchanger can be improved, and the dehumidifying means Providing a vehicle air conditioner that reduces the power consumption of the heat pump and saves energy compared to the case where the air used for regeneration is discharged outside the vehicle by returning the mixed air after passing through the regeneration unit into the vehicle. Can do.

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 during the dehumidifying and heating operation Airway configuration diagram in freeze prevention mode of the dehumidifying and heating operation Airway configuration diagram during cooling operation Air path configuration diagram with the same exhaust air volume adjustment means Airway configuration diagram of vehicle air conditioner of Embodiment 2 of the present invention 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.

  First, the air conditioning system of this invention is demonstrated, referring FIG.

  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 exchanging heat as a condenser during the cooling operation and an evaporator during the heating operation is disposed in the regeneration 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 as a decompression means (with an expansion valve 19a and a solenoid valve 19b as shown in the figure) is provided between the first in-vehicle heat exchanger 8 and the first in-vehicle heat exchanger 8. A check valve 20 and a throttle valve 21 (a built-in expansion valve 21a and an electromagnetic valve 21b as shown in the figure) are disposed between the check valve 20 and the pressure reducing means.

  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.

  Next, the dehumidifying system of the present invention will be described with reference to FIG.

  The dehumidifying system exchanges heat between dehumidifying means 26 having a dehumidifying unit 24 and a regenerating unit 25 described later for dehumidifying the inside air, and the inside air introduced from the inside air introduction port 4 and the outside air introduced from the outside air introduction port 1. A precooling heat exchanger 27 to be made, and a precooling air passage 28 branched from between the outside air inlet 1 of the outside intake air passage 3 and the first air passage switching means 6 and connected to the first air passage switching means 6. A dehumidifying air passage 29 branched from the inside air inlet 4 of the in-vehicle intake air passage 5 and the first air passage switching means 6 and connected to the first air passage switching means 6, and the second air The regeneration air path 12 extends from the path switching means 10 to the regeneration air outlet 30 for returning the inside air into the vehicle.

  A precooling heat exchanger 27 is provided at the intersection of the dehumidifying air passage 29 and the precooling air passage 28, and is provided between the precooling heat exchanger 27 in the dehumidifying air passage 29 and the first air passage switching means 6. A dehumidifying unit 24 of the dehumidifying unit 26 is disposed, and a regenerating unit 25 of the dehumidifying unit 26 is disposed in the regenerating air path 12.

  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.

  A third in-vehicle heat exchanger 13 that functions as a condenser during the cooling operation and an evaporator during the heating operation is disposed between the dehumidifying means 26 and the regeneration outlet 30 in the regeneration air passage 12.

  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.

  The dehumidifying means 26 is constituted by a rotatable cylindrical adsorption rotor that holds a moisture absorbing material on a base material. In this case, the dehumidifying means 26 is provided with a drive unit and rotated at a predetermined speed, thereby dehumidifying means. 26, the dehumidifying part 24 straddling the dehumidifying air path 29 and the regenerating part 25 straddling the regenerating air path 12 can be continuously replaced.

  Further, the dehumidifying means 26 may be constituted by a laminated body of heat transfer plates provided with alternately intersecting air passages in which the moisture absorbing material is held on the base material. In this case, the dehumidifying means 26 has a drive unit. Without being provided, the dehumidifying air passage 29 communicating with the dehumidifying portion 24 and the regenerating air passage 12 communicating with the regenerating portion 25 can be switched at predetermined intervals by a switching means, for example, a shutter or damper provided with a driving portion.

  In addition, the precooling heat exchanger 27 is preferably a sensible heat exchanger composed of a stack of heat transfer plates having air passages that alternately intersect, and in this case, the heat transfer plate has an air passage height. A plurality of ribs to be held are arranged at predetermined intervals, and the material is resin or metal.

  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 causes the outside air to pass from the outside air inlet 1 through the precooling air path 28 to the first air path switching means 6, and the inside air is the inside air inlet. 4 to the first air passage switching means 6 through the dehumidifying air passage 29.

  At this time, the outside air blown into the precooling air passage 28 from the outside air introduction port 1 and the inside air blown into the dehumidifying air passage 29 from the inside air introduction port 4 are heat-exchanged by the action of the precooling heat exchanger 27, That is, the inside air passing through the dehumidifying air passage 29 is cooled by the outside air, and the relative humidity increases.

  The inside air whose relative humidity has increased through the pre-cooling heat exchanger 27 is blown to the dehumidifying unit 24 of the dehumidifying means 26, dehumidified by the dehumidifying unit 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.

  On the other hand, the outside air in the precooling air passage 28 is heat-exchanged by the precooling heat exchanger 27, that is, heated by the inside air and the 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 been raised in temperature after passing through the pre-cooling heat exchanger 27 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.

  Part of the air blown to the second air path switching means 10 is distributed to the regenerative air path 12 by the operation of the second air path switching means 10, and the rest is distributed 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 blown to the regeneration air passage 12 is blown to the regeneration unit 25 of the dehumidifying means 26, and the moisture absorbing material of the dehumidifying means 26 receives heat from the air in the regeneration air passage 12 to remove moisture from the air in the regeneration air passage 12. Moisturize inside.

  In this way, the dehumidifying means 26 is regenerated, and the air that has passed through the dehumidifying means 26 is blown out from the regeneration outlet 30 into the vehicle.

  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 12 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.

  Furthermore, in the configuration of claim 2 of the present invention, a third in-vehicle heat exchanger 13 that acts as an evaporator during dehumidifying heating is disposed between the dehumidifying means 26 and the regeneration outlet 30 in the regeneration air passage 12. The third in-vehicle heat exchanger 13 cools and dehumidifies the air in the regeneration air passage 12, and then returns the air to the interior through the regeneration outlet 30.

  By comprising in this way, latent heat of water vapor | steam is collect | recovered with the 3rd in-vehicle heat exchanger 13 from the air after passing the reproduction | regeneration part 25 of the dehumidification means 26, and the heat is sent to the 2nd in-vehicle heat exchanger 9 via a refrigerant | coolant. The heating capacity of the second in-vehicle heat exchanger 9 can be improved by returning to.

  Further, by returning the air used for regeneration of the dehumidifying means 26 to the inside of the vehicle, the heating load of the heat pump can be reduced as compared with the case where the air used for regeneration is discharged to the outside of the vehicle. Can be provided.

  Furthermore, since it is difficult for heat to escape to the outside of the vehicle, heating with a small air flow is sufficient to maintain the interior temperature at a comfortable temperature, and noise generated from the air-conditioning outlet 2 and the air blowing means 7 is reduced. Can keep.

  The outside air sucked into the precooling air passage 28 from the outside air introduction port 1 and the inside air sucked into the dehumidifying air passage 29 from the inside air introduction port 4 are subjected to sensible heat exchange by the action of the precooling heat exchanger 27. Therefore, the inside air in the dehumidifying air passage 29 is cooled by the outside air and the relative humidity rises, and the inside air is easily absorbed by the moisture absorbing material of the dehumidifying means 26 due to the rise of the relative humidity.

  Therefore, since the relative humidity is higher when dehumidification is performed after mixing the inside air and the outside air, or when the inside air is dehumidified without exchanging sensible heat, more water can be dehumidified.

  The air temperature of dehumidified air rises due to the heat of moisture adsorption, but the heat of adsorption increases in proportion to the increase in the amount of dehumidification, so that the inside air dehumidified with more water is heated by more heat of adsorption. Will rise, and the temperature of the mixed air mixed with the outside air heat-exchanged by the pre-cooling heat exchanger 27 will rise, so that the heating load of the heat pump can be further reduced.

  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 precooling heat exchanger 27 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 the outside air from the pre-cooling air path 28 to the outside air intake air path 3.

  Further, the air passage for introducing the inside air is maintained as the dehumidifying air passage 29. If changed in this way, the air introduced into the precooling heat exchanger 27 becomes only the inside air from the inside air inlet 4 and the outside air is not introduced, so the temperature of the precooling heat exchanger 27 rises and the surface is iced. Even if it becomes difficult or ice adheres, it can be melted.

  Therefore, since the freezing of the pre-cooling heat exchanger 27 can be suppressed, continuous dehumidifying heating can be performed even in extremely cold regions.

  It should be noted that a heating means configured to include a heating heat exchanger that heats air by heat exchange with circulating cooling water that cools an engine or electric power equipment, or an electric heater such as a PTC heater, or both, is provided for the blowing means 7. In this case, even if the heat absorption from the outside air in the outside heat exchanger 14 is reduced in an extremely cold region, that is, even if the heating capacity of the second in-vehicle heat exchanger is reduced, the dehumidifying heating is performed. You can drive.

  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 air conditioner switches 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 is operated, and the communication with the regeneration air path 12 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 refrigerant is controlled by the control means with the compressor 16, the four-way valve 17, the check valve 18, the external heat exchanger 14, the third in-vehicle heat exchanger 13, the throttle valve 19, the first in-vehicle heat exchanger 8, The compressor 16 operates so as to flow in the order, and the outside heat exchanger 14 acts as a condenser and the first inside heat exchanger 8 acts as an evaporator.

  At this time, no refrigerant flows through the second in-vehicle heat exchanger 9. 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 discharged 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 12 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.

  Furthermore, by recovering steam latent heat in the third in-vehicle heat exchanger 13 from the mixed air that has passed through the regeneration unit of the dehumidifying means 26, the heating capacity of the second in-vehicle heat exchanger 9 can be improved, By returning the air after passing through the regeneration unit 25 of the dehumidifying means 26 to the inside of the vehicle, the air conditioning load of the heat pump can be reduced compared with the case where the air used for the regeneration is discharged outside the vehicle, and the vehicle air conditioner has an energy saving effect. The effect of providing a device can be obtained.

  In addition, as shown in FIG. 5, the inside air discharge air path over the inside air discharge port 31 which branches from between the third in-vehicle heat exchanger 13 and the regeneration air outlet 30 in the regeneration air passage 12 and exhausts the inside air to the outside of the vehicle. 32, which is disposed at a branch point between the regeneration air passage 12 and the inside air discharge air passage 32, and is configured by a damper mechanism that adjusts the amount of air passing through the regeneration air passage 12 to return to the inside of the vehicle and the amount to discharge outside the vehicle. It is good also as a structure provided with the air volume adjustment means 33. FIG.

  With such a configuration, when it is desired to quickly remove fogging of the window during dehumidifying heating, the exhaust air volume adjusting means 33 is operated by the control means, the air volume returning from the regeneration outlet 30 to the inside of the vehicle, and the inside air outlet 31 to the outside of the vehicle. The amount of air to be discharged can be adjusted, and part of the air can be actively discharged outside the vehicle to reduce the amount of water in the passenger compartment, and the fogging of the windows can be eliminated rapidly.

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

  First, the configuration of the present embodiment and the air conditioning system will be described with reference to FIG.

  As shown in FIG. 6, in the configuration of the present embodiment, between the regeneration unit 25 and the regeneration outlet 30 in the regeneration air passage 12 and upstream of the first in-vehicle heat exchanger 8 in the outside intake air passage 3. A regenerative heat exchanger 34 is provided at the intersection with the side.

  The regeneration outlet 30 communicates with the outside of the vehicle, and the air that has passed through the regeneration unit 25 exchanges heat with the air that is blown out into the vehicle through the outside intake air passage 3 by the regeneration heat exchanger 34, and then from the regeneration outlet 30. It is discharged outside the car.

  A fourth in-vehicle heat exchanger 35 is provided upstream of the dehumidifying section 24 in the dehumidifying air passage 29, and the first in-vehicle heat exchanger 8, the second in-vehicle heat exchanger 9, and the fourth in-vehicle heat exchanger. 35, cooling or heating of the air blown into the vehicle interior is effected by the action of a heat pump configured by circulating a refrigerant among the vehicle exterior heat exchanger 14, the compressor 16, and the decompression means.

  Next, the dehumidifying system of the present embodiment will be described with reference to FIG.

  The dehumidifying system branches from between the dehumidifying means 26 having the dehumidifying part 24 and the regenerating part 25 for dehumidifying the inside air, and the inside air inlet 4 of the vehicle intake air path 5 and the first air path switching means 6. A dehumidifying air passage 29 connected to the first air passage switching means 6 and a regenerating air passage 12 extending from the second air passage switching means 10 to the regeneration air outlet 30 for returning the inside air into the vehicle.

  Further, a fourth in-vehicle heat exchanger 35 that acts as an evaporator during the dehumidifying heating operation is provided in the dehumidifying air passage 29 on the upstream side of the dehumidifying section 24, and is connected to the dehumidifying air passage 29 from the inside air inlet 4. The blown inside air is subjected to heat exchange and dehumidification by the fourth in-vehicle heat exchanger 35, and then flows into the dehumidifying unit 24, where dehumidification and heat exchange are further performed.

  In the configuration described above, the operation will be described with reference to FIG.

  During the dehumidifying heating operation, the operation of the first air path switching means 6 introduces the air path from the outside air introduction port 1 through the vehicle outside intake air path 3 to the first air path switching means 6, and the inside air introduces the inside air. An air path from the mouth 4 to the first air path switching means 6 through the dehumidifying air path 29 is formed.

  At this time, the inside air blown into the dehumidifying air passage 29 from the inside air introduction port 4 is subjected to heat exchange and dehumidification by the action of the fourth in-vehicle heat exchanger 35, that is, the inside air passing through the dehumidifying air passage 29 is heated to the fourth in-vehicle heat. Relative humidity rises by exchanging heat with the refrigerant in the exchanger 35 and being cooled.

  The inside air whose relative humidity has increased after passing through the fourth in-vehicle heat exchanger 35 is blown to the dehumidifying unit 24 of the dehumidifying means 26 and further dehumidified by the dehumidifying unit 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.

  Then, the dry air that has passed through the dehumidifying section 24 and the temperature rises, and the outside air that has been introduced from the outside air introduction port 1 through the outside air intake air passage 3 are mixed through the first air passage switching means 6, and the air blowing means 7 is sucked.

  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 fourth in-vehicle heat exchanger 35. The second in-vehicle heat exchanger 9 operates as a condenser, the out-of-vehicle heat exchanger 14 and the fourth in-vehicle heat exchanger 35 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.

  Part of the air blown to the second air path switching means 10 is distributed to the regenerative air path 12 by the operation of the second air path switching means 10, and the rest is distributed 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 blown to the regeneration air passage 12 is blown to the regeneration unit 25 of the dehumidifying means 26, and the moisture absorbing material of the dehumidifying means 26 receives heat from the air in the regeneration air passage 12 to remove moisture from the air in the regeneration air passage 12. The dehumidifying means 26 is regenerated.

  The air that has passed through the dehumidifying means 26 exchanges heat with the air that passes through the outside intake air passage 3 outside the vehicle and is blown into the vehicle by the regenerative heat exchanger 34, and the moisture dehumidified from the dehumidified material from the regenerative outlet 30. And it is exhausted outside the car.

  Here, in the configuration of the present embodiment, the fourth in-vehicle heat exchanger 35 acting as an evaporator is disposed upstream of the dehumidifying section 24 in the dehumidifying air passage 29, and the dehumidifying is performed by the fourth in-vehicle heat exchanger 35. The air in the air passage 29 is dehumidified by the dehumidifying unit 24 after being cooled and dehumidified.

  By comprising in this way, latent heat of water vapor | steam is collect | recovered with the 4th in-vehicle heat exchanger 35 from the inside air ventilated from the inside air inlet 4 to the dehumidification wind path 29, and the heat is supplied to the 2nd in-vehicle heat exchanger via the refrigerant. By returning to 9, the heating capacity of the second in-vehicle heat exchanger 9 can be improved.

  Furthermore, since dehumidification can be performed by both the fourth in-vehicle heat exchanger 35 and the dehumidifying unit 24, the air blown into the vehicle can be rapidly dehumidified.

  In addition, the regenerative heat exchanger 34 is preferably a sensible heat exchanger composed of a laminated body of heat transfer plates provided with alternately intersecting air passages. In this case, the heat transfer plate has an air passage height. A plurality of ribs to be held are arranged at predetermined intervals, and the material is resin or metal.

  The vehicle air conditioner according to the present invention uses a part of the air heated and dehumidified for heating the inside of the vehicle for regeneration of the dehumidifying means, and recovers the latent heat of water vapor from the air used for regeneration of the dehumidifying means. In addition, the heat consumption of the heat pump for heating is suppressed, which has an energy saving effect, and is useful as a vehicle air conditioner used in electric vehicles, hybrid vehicles, and the like where 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 Regenerative air path 13 Third in-vehicle heat exchanger 14 Outside heat exchanger 16 Compressor 19 Throttle valve 21 Throttle valve 24 Dehumidifying part 25 Regenerating part 26 Dehumidifying means 27 Precooling heat exchanger 28 Precooling air path 29 Dehumidifying Air passage 30 Regenerative air outlet 31 Inside air outlet 32 Inside air outlet air passage 33 Exhaust air volume adjusting means 34 Regenerative heat exchanger 35 Fourth in-vehicle heat exchanger

Claims (6)

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 regeneration air passage branched from the second air passage switching means and communicating at least a part of the air blown out by the air blowing means to the regeneration air outlet;
A dehumidifying means having a dehumidifying section upstream of the first air path switching means in the dehumidifying air path, and a regenerating section 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;
The first in-vehicle heat exchanger, the second in-vehicle heat exchanger, the out-of-vehicle heat exchanger, the compressor, and a heat pump that circulates refrigerant between the decompression means and heating when introducing outside air During operation, a part of the mixed air in which the outside air introduced from the outside air introduction port and the inside air dehumidified by the dehumidifying unit are mixed by the first air path switching unit by the second air path switching unit. A vehicle air conditioner that performs dehumidification heating by flowing into the regeneration air passage. A third in-vehicle heat exchanger is provided between the regeneration unit in the regeneration air passage and the regeneration outlet,
The regeneration outlet communicates with the interior of the vehicle;
A first in-vehicle heat exchanger, a second in-vehicle heat exchanger, the third in-vehicle heat exchanger, an outside heat exchanger, a compressor, and a heat pump that circulates a refrigerant between decompression means,
2. The air that has passed through the regeneration section is subjected to heat exchange and dehumidification by the third in-vehicle heat exchanger acting as an evaporator, and then returned to the interior from the regeneration outlet. The vehicle air conditioner described. A regenerative heat exchanger is provided between the regenerator in the regenerative air passage and the regenerative air outlet, and at the intersection with the upstream side of the first in-vehicle heat exchanger in the outside air intake air passage,
The regeneration outlet communicates with the outside of the vehicle,
The air that has passed through the regenerator is heat-exchanged by the regenerative heat exchanger with the air that is blown out into the vehicle through the outside air intake air passage, and is then discharged from the regeneration outlet to the outside of the vehicle. The vehicle air conditioner according to claim 1. A fourth in-vehicle heat exchanger is provided upstream of the dehumidifying part in the dehumidifying air passage,
A first in-vehicle heat exchanger, a second in-vehicle heat exchanger, the fourth in-vehicle heat exchanger, an outside heat exchanger, a compressor, and a heat pump that circulates a refrigerant between decompression means,
The inside air flowing into the dehumidifying air passage from the inside air inlet is subjected to heat exchange and dehumidification by the fourth in-vehicle heat exchanger acting as an evaporator, and then flows into the dehumidifying portion. Item 4. The vehicle air conditioner according to any one of Items 1 to 3. A precooling 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 precooling heat exchanger is provided at the intersection of the upstream side of the dehumidifying part in the dehumidifying air passage and the precooling air passage,
4. The vehicle according to claim 1, wherein the precooling heat exchanger exchanges heat between the inside air flowing into the dehumidifying air passage from the inside air introduction port and the outside air introduced from the outside air introduction port. 5. Air conditioner. An inside air exhaust air passage that branches from between the third heat exchanger inside the regeneration air passage and the regeneration air outlet and exhausts the inside air to the outside of the vehicle;
Arranged at the branch point of the regeneration air passage and the inside air discharge air passage
It is characterized by comprising an exhaust air volume adjusting means for adjusting the amount of air passing through the regeneration air path to be returned into the vehicle and the amount discharged outside the vehicle,
The vehicle air conditioner according to any one of claims 1 to 5.

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