JPH06305398A - Air conditioning device for vehicle - Google Patents

Abstract

PURPOSE:To provide a vehicle air conditioning device in which clouding of window glass due to dew condensation water adhering to an indoor heat exchanger blowing out in vehicle interior, when a mode of cold heat source passing through the indoor heat exchanger changes over to a mode of hot heat source passing through the same, is prevented. CONSTITUTION:When a cooling mode (cold heat source mode) changes over to a heating mode (hot heat source mode), a transparent conductive thin film 24 on a windshield 23 is connected to a power supply due to actuation of a thin film power supply means incorporated in a control device 50. The windshield 23 is thus heated so that clouding of the windshield 23 due to evaporation of dew condensation water adhering on an indoor heat exchanger 32 is evaded. In this changeover rotational speed of a refrigerant compressor 34 is raised gradually so that evaporation of dew condensation water is made slowly. Also, an external air let-in mode is set so that humid air in vehicle interior is forcefully discharged outdoors. In this manner, prevention of clouding of the windshield 23 is aided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner in which a cold heat source or a warm heat source passes through an indoor heat exchanger,
In particular, the present invention relates to a technique suitable for use in a vehicle such as an electric vehicle that does not have a hot water heat source for heating.

[0002]

2. Description of the Related Art When a cold heat source mode in which a cold heat source passes through an indoor heat exchanger is switched to a warm heat source mode in which a warm heat source passes through, the cold heat source passes through the indoor heat exchanger and thus adheres to the indoor heat exchanger. The dew condensation water, which had been used, is heated and evaporated when the warm heat source passes through the indoor heat exchanger. The evaporated dew condensation water is blown into the vehicle compartment through the duct. For this reason, when the cold heat source mode is switched to the warm heat source mode, the humidity in the vehicle interior rapidly rises, and the window glass is fogged.

As a conventional technique for solving this problem,
JP-A-4-252723 and JP-A-4-25421
Techniques disclosed in Japanese Patent Laid-Open No. 2 and Japanese Patent Laid-Open No. 4-243615 are known. (A) In the technique disclosed in Japanese Patent Laid-Open No. 4-252723, when the cold heat source mode is switched to the warm heat source mode, the air containing the dew condensation water is not blown into the passenger compartment, and the outside of the passenger compartment is discharged through the exhaust duct. It is a technique to blow out to. (B) In the technique disclosed in Japanese Patent Laid-Open No. 4-254212, when the cold heat source mode is switched to the warm heat source mode, the mode is switched to the outside air mode to suppress an increase in the indoor humidity and send the outside air into the vehicle interior. This is a technique for forcibly discharging the air containing the condensed water blown into the vehicle interior to the outside of the vehicle. (C) In the technique disclosed in Japanese Patent Laid-Open No. 4-243615, when the cold heat source mode is switched to the warm heat source mode, the condensation water adhering to the indoor heat exchanger is gradually evaporated so that the indoor heat exchanger This is a technology that suppresses the temperature rise and operates for a predetermined time.

[0004]

The technique shown in (a) above is uneconomical because it is necessary to provide an exhaust duct only for exhausting air containing dew condensation water into the passenger compartment. There is a problem that the structure becomes complicated because it is necessary to handle the duct to guide it outside the vehicle. Above (b)
In the technique described in (1), the dew condensation water is not limited and is evaporated and blown out into the passenger compartment, so the effect of preventing the fogging of the window glass is small. The technique described in (c) above has a problem that it takes time for the occupant to obtain the effect of the heat source mode because it is a technique for evaporating dew condensation water over time.

[0005]

It is an object of the present invention to obtain a high anti-fog effect for a window glass when switching from a cold heat source mode to a warm heat source mode, and at the same time, it is economical and has a quick effect of the heat source mode. An object is to provide an air conditioner for a vehicle that can be obtained.

[0006]

SUMMARY OF THE INVENTION An air conditioner for a vehicle according to the present invention includes a duct for sending air toward the inside of a vehicle, a blower for producing an air flow toward the inside of the duct, and the inside of the duct. And an indoor heat exchanger that cools or heats the air passing through the duct passing through a cold heat source or a warm heat source and the window glass of the vehicle, and heats the window glass by receiving electricity. A transparent conductive thin film, a cold heat source mode of passing a cold heat source to the indoor heat exchanger, and a switching means capable of switching between a warm heat source mode of passing a warm heat source to the indoor heat exchanger, and this switching means, A technical means including a thin film energizing means for energizing the transparent conductive thin film when the cold heat source mode is switched to the warm heat source mode is adopted. When the cold heat source mode is switched to the warm heat source mode, other than when the cold heat source mode is switched to the warm heat source mode, the condensed water attached to the indoor heat exchanger after the cold heat source mode is stopped It also includes the start of the operation of the heat source mode in the state where the vaporization or dripping is not sufficient (as an example of detecting the state of the condensed water adhering to the indoor heat exchanger after the cold source mode is stopped, the cold source mode is used. There is a technology to judge whether a certain time has elapsed since the stoppage of water, and a technology to install a water contact detection sensor in the indoor heat exchanger).

[0007]

When the switching means switches from the cold heat source mode to the warm heat source mode, the thin film energizing means energizes the transparent conductive thin film. By switching from the cold heat source mode to the warm heat source mode, the temperature of the indoor heat exchanger rises, and the condensed water adhering to the indoor heat exchanger in the cold heat source mode evaporates. The air containing the condensed water is blown into the vehicle compartment through the duct to increase the humidity in the vehicle compartment. On the other hand, by switching from cold heat source mode to warm heat source mode,
The transparent conductive thin film is energized to heat the window glass. When the temperature of the window glass rises, dew condensation on the window glass, that is, fogging is prevented.

[0008]

As described above, the vehicle air conditioner of the present invention heats the window glass with the transparent conductive thin film, so that the dew condensation water of the indoor heat exchanger evaporates. Even if the humidity rises, fogging of the window can be suppressed. The transparent conductive thin film prevents fogging of the window glass due to evaporation of condensed water in the indoor heat exchanger, and can also be used for thawing the window glass and for preventing fogging in rainy weather, winter, etc. It is highly likely. Further, since the temperature rise of the indoor heat exchanger is not restricted, the effect of the warm heat source mode can be quickly obtained when the cold heat source mode is switched to the warm heat source mode.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a vehicle air conditioner of the present invention will be described based on an embodiment shown in the drawings. [Configuration of First Embodiment] FIGS. 1 and 6 show an embodiment of the present invention, and FIG. 1 is a schematic configuration diagram of a vehicle air conditioner showing a refrigerant circuit diagram of an indoor unit and a refrigeration cycle. The indoor unit 1 includes a duct 2 that forms an air passage that sends air toward the passenger compartment. The duct 2 is arranged in the vehicle compartment, and one end of the duct 2 has an inside / outside air switching means 3
The blower 4 provided with is connected. Inside / outside air switching means 3
Includes an inside air introduction port 5 that communicates with the vehicle interior to introduce air (inside air) inside the vehicle interior, and an outside air introduction port 6 that communicates with the outside of the vehicle interior to introduce air outside the vehicle interior (outside air). The inside / outside air switching unit 3 includes an inside / outside air switching damper 7, and the inside / outside air switching damper 7 can switch the air guided into the duct 2 between the inside air and the outside air. The blower 4 includes a fan case 8, a fan 9, and a motor 10. The motor 10 rotates the fan 9 when energized, and sends the inside air or the outside air to the room through the duct 2.

At the other end of the duct 2, there is formed an air outlet for blowing out the air passing through the duct 2 toward each part in the vehicle compartment. This air outlet blows out cool air mainly from the center of the front part of the passenger compartment toward the upper body of the occupant, and from both sides of the front part of the passenger compartment mainly ejects cool air toward the upper body of the occupant or side glass. It includes a side face outlet 14, a foot outlet 15 that mainly blows warm air toward the occupant's feet, and a defroster outlet 16 that mainly blows warm air toward the window glass. Further, in the duct 2, a center face damper 17, a foot damper 18, and a defroster damper 19 for controlling the air flow to each of the outlets are provided in an air passage communicating with other outlets except the side face outlet 14. ing. The center face outlet 13 and the side face outlet 14 are provided with an occupant opening / closing damper 20 for manually adjusting the amount of air blown according to the occupant's preference.

A thin transparent conductive thin film 24, which is transparent and generates heat when an electric current is applied, is provided on the inner surface of the front window glass 23 (the surface on the inner side of the vehicle interior) or the surface between the two glasses forming the laminated glass. The window glass 23 is formed over almost the entire surface. This transparent conductive thin film 24 is used for the window glass 2
Electrodes 25 are provided on both sides of 3, and the window glass 23 is directly heated by energizing the transparent conductive thin film 24 through the electrodes 25.

Inside the duct 2, an indoor heat exchanger 32 of a refrigerating cycle 31 for exchanging heat between a refrigerant (cold heat source or warm heat source) passing through the inside and air is provided on the entire surface of the air passage. In the present embodiment, the indoor heat exchanger 3
The cold heat source mode in which the cold heat source flows in 2 is the indoor heat exchanger 3
2 is a cooling mode in which a low temperature refrigerant (cold heat source) flows, and a warm heat source mode in which a warm heat source flows in the indoor heat exchanger 32 means that a high temperature refrigerant (warm heat source) flows in the indoor heat exchanger 32. It is the heating mode.

The refrigeration cycle 31 is a heat pump type refrigeration cycle, and in addition to the indoor heat exchanger 32 described above, the outdoor heat exchanger 33, the refrigerant compressor 34, the pressure reducing device 35, the accumulator 36, and the flow direction of the refrigerant are switched. Four-way valve 3
7 and are connected by a refrigerant pipe 38. The outdoor heat exchanger 33 exchanges heat between the air outside the vehicle compartment and the refrigerant outside the duct 2, is provided with an outdoor fan 41, and is provided at a position where traveling wind generated by traveling of the vehicle hits. The refrigerant compressor 34 sucks, compresses, and discharges the refrigerant, and is driven by an electric motor (not shown). The refrigerant compressor 34 is arranged, for example, integrally with an electric motor in a sealed case. The rotation speed of the electric motor is continuously variable under the control of the inverter 42, and the refrigerant discharge capacity of the refrigerant compressor 34 is continuously changed by the change of the rotation speed of the electric motor. The decompression device 35 includes a cooling capillary tube 43.
And a heating capillary tube 44. And
The cooling capillary tube 43 is provided in parallel with the one-way valve 4
5 is provided, and the capillary tube 43 for cooling during heating is provided.
Is bypassed, and at the time of cooling, a refrigerant is allowed to flow through the cooling capillary tube 43. In addition, the heating capillary tube 44 is also provided with a one-way valve 46 in parallel to bypass the heating capillary tube 44 during cooling and to allow the refrigerant to flow through the heating capillary tube 44 during heating. .
The cooling capillary tube 43 decompresses and expands the refrigerant flowing from the outdoor heat exchanger 33 to the indoor heat exchanger 32, and the heating capillary tube 44 expands the indoor heat exchanger 32.
The refrigerant flowing into the outdoor heat exchanger 33 is expanded under reduced pressure.
The accumulator 36 stores the excess refrigerant in the refrigeration cycle 31 and sends the gas-phase refrigerant to the refrigerant compressor 34,
It is provided to prevent the liquid refrigerant from being sucked into the refrigerant compressor 34.

The four-way valve 37 switches the flow of the refrigerant in the cooling mode and the heating mode as follows. In the cooling mode, the refrigerant discharged from the refrigerant compressor 34 is supplied to the four-way valve 37.
→ outdoor heat exchanger 33 → capillary tube 43 for cooling →
Indoor heat exchanger 32 → four-way valve 37 → accumulator 36 →
It flows in order of the refrigerant compressor 34 (see arrow C in the figure). In the heating mode, the refrigerant discharged from the refrigerant compressor 34 is supplied to the four-way valve 37.
→ Indoor heat exchanger 32 → Capillary tube 44 for heating →
Outdoor heat exchanger 33 → four-way valve 37 → accumulator 36 →
The refrigerant flows in the order of the compressor 34 (see arrow H in the figure).

Electric components such as the blower 4, the inverter 42, the outdoor fan 41, and actuators (not shown) for driving the dampers are energized and controlled by the control device 50 shown in FIG. The control device 50 controls energization of each electric component according to an operation signal of the operation panel 51 operated by an occupant, various sensor signals, and the like, and the operation panel 51 is installed at a position with good operability. The operation panel 51, as shown in FIG. 3, sets a blowout mode changeover switch group 52 that sets each blowout mode, an air volume setting switch 53 that sets the amount of air blown from the duct 2 into the vehicle compartment, and the inside and outside air. The inside / outside air setting switch 54, an air conditioning mode setting switch group 55 for instructing the setting and stopping of each air conditioning mode, and the refrigerant compressor 34 depending on the air conditioning mode and the setting position.
The temperature control lever 56 is provided for setting the rotation speed.
The air-conditioning mode setting switch group 55 includes a blower switch 55a for instructing activation of the air-blowing mode, a cooling switch 55b for instructing activation of the cooling mode, a heating switch 55c for instructing activation of the heating mode, and operation in each operation mode. A stop switch 55d for instructing to stop is provided. In addition, the cooling switch 55b and the heating switch 55c of the air conditioning mode setting switch group 55 in the present embodiment.
Is a switching means of the present invention for switching between the cooling mode (cooling heat source mode) and the heating mode (warming heat source mode) by switching.

As various sensors for sending sensor signals to the control device 50, a refrigerant compressor temperature detector 57 for detecting the temperature of the refrigerant compressor 34, a pressure sensor 58 for detecting the discharge pressure of the refrigerant compressor 34, and a refrigerant compression. Pressure switch 5 that turns on when the refrigerant pressure on the discharge side of the machine 34 rises above a set value
9, a heat exchange thermistor 60 that detects the temperature of the indoor heat exchanger 32, a temperature thermistor 61 that detects the temperature of the vehicle interior, and the amount of current that is supplied to the inverter 42 from the battery 63 of 200 V DC that is the power source of the electric vehicle A current detector 64 and the like are provided. In addition, reference numeral 65 in FIG. 2 denotes a DC that controls the amount of electricity to the transparent conductive thin film 24.
In the / DC converter, the controller 50 controls the amount of electricity supplied to the transparent conductive thin film 24.

The control device 50 uses a computer, and is transparent when the heating switch 55c is turned on to switch to the heating mode (heat source mode) from the operating state in the cooling mode (cooling source mode). The function of the thin film energizing means for energizing the conductive thin film 24 is programmed. The operation of the vehicle air conditioner including the operation of the thin film energizing means in this embodiment will be described with reference to the flowchart of FIG. When the blower switch 55a, the cooling switch 55b or the heating switch 55c is turned on (start), the operation mode is identified (step S1). If it is determined in step S1 that the blowing mode has been selected, the blowing operation is performed according to the setting states of the blowing mode changeover switch group 52, the air volume setting switch 53, and the inside / outside air setting switch 54 (step S2). Then, it is judged whether or not the stop switch 55d is turned on (step S3), and if YES, the cooling check flag CF is reset to "0" (step S4), and then the operation is stopped. If the determination in step S3 is NO, the process returns to step S1.

If it is determined in step S1 that the cooling mode is selected, the cooling check flag CF
Is set to "1" (step S5). Next, the cooling operation is performed according to the setting states of the blowout mode changeover switch group 52, the air volume setting switch 53, the inside / outside air setting switch 54, and the temperature adjusting lever 56 (step S6). After that, the process proceeds to step S3, and when the stop switch 55d is ON, the cooling check flag CF is reset to "0" to stop the operation, and otherwise, the process returns to step S1.

When it is determined in step S1 that the heating mode is selected, it is first determined whether the cooling check flag CF is "1" (step S7).
When this determination result is YES, that is, when the cooling check flag CF is “1”, it means that the operating state in the cooling mode (cooling source mode) is switched to the heating mode (heating source mode). Then, the transparent conductive thin film (in the figure,
HWS) 24 is energized to set the outside air mode, and from the time of switching from the cooling mode to the heating mode,
As shown in FIG. 5, the rotation speed of the refrigerant compressor 34 is set so as to gradually increase the rotation speed of the refrigerant compressor 34 (step S8). Next, it is judged whether or not a predetermined time t has elapsed since the switching from the cooling mode to the heating mode (step S9). If the result of this determination is YES, it is determined that the condensed water adhering to the indoor heat exchanger 32 has evaporated and the window glass 23 in the room does not fog, and the transparent conductive thin film 24 is de-energized, The cooling check flag CF is reset to "0" and the inside / outside air mode is set as selected by the inside / outside air setting switch 54 (step S10). If the result of the determination in step S7 is NO, the result of the determination in step S9 is NO, or after the execution of step S10, the heating operation is performed based on the respective set states (step S11), and then step S11.
Go to 3. It should be noted that the predetermined time t is equal to
The time required for the condensed water adhering to the inside to evaporate, and after the condensed water adhered to the indoor heat exchanger 32 has finished evaporating, much of the evaporated condensate water that has been blown out into the room is discharged to the outside. It is set by adding the time required for the indoor humidity to drop when blown out.

[Operation of First Embodiment] Next, the operation at the time of switching from the cooling mode to the heating mode according to the present invention will be described.
This will be described with reference to the time chart of FIG. In the cooling mode, due to the operation of the refrigeration cycle 31, a low-temperature refrigerant (cooling heat source) passes through the indoor heat exchanger 32 to cool the air passing through the duct 2. This cooled air is duct 2
Is blown into the passenger compartment from the air to cool the passenger compartment. When the indoor heat exchanger 32 cools the air passing through the inside of the duct 2, the water vapor contained in the air is condensed on the indoor heat exchanger 32 and becomes condensed water to adhere to the indoor heat exchanger 32. When the occupant turns on the heating switch 55c during the operation in the cooling mode, the heating mode is switched to. Then, the transparent conductive thin film 24
And the window glass 23 is heated. When the mode is switched to the heating mode, the outside air introduction mode is set, the rotation speed of the refrigerant compressor 34 gradually increases, and the temperature of the warm refrigerant (heat source) passing through the indoor heat exchanger 32 gradually increases. . Then, the condensed water adhering to the indoor heat exchanger 32 gradually evaporates and is gradually blown out into the vehicle interior. Since air containing dew condensation water is blown into the vehicle interior from the duct 2, the humidity in the vehicle interior increases. At this time, the temperature of the window glass 23 is raised by the energization of the transparent conductive thin film 24, and the occurrence of fogging of the window glass 23 is suppressed, and the outside air is introduced. It is forcibly discharged into the vehicle and the increase in humidity inside the vehicle is suppressed. Then, after a lapse of a predetermined time t from the switching from the cooling mode to the heating mode, the condensed water adhering to the indoor heat exchanger 32 is completely evaporated, and the humidity of the indoor air also decreases. The energization of the thin film 24 is stopped, and the heating operation is performed according to the operation state of the operation panel 51.

[Effects of the First Embodiment] In the present embodiment, as described above, when the cooling mode is switched to the heating mode, the window glass 23 is heated and the occurrence of fogging of the window glass 23 is suppressed and , The condensation water adhering to the indoor heat exchanger 32 is gradually evaporated to prevent the fogging of the window glass 23, and the outside air is introduced to forcibly discharge the high-humidity indoor air to the outside of the vehicle. The occurrence of cloudiness in No. 23 is suppressed. That is, in the present embodiment, in addition to the technique of the present invention that suppresses the occurrence of fogging of the window glass 23 when the cooling mode is switched to the heating mode, two other techniques (when switching from the cooling mode to the heating mode) are used. Since the technique for suppressing the fogging of the window glass 23 is also used, the fogging of the window glass 23 can be surely suppressed even when the cooling mode is switched to the heating mode.

[Second Embodiment] FIGS. 7 and 8 show a second embodiment. FIG. 7 is a schematic view of the indoor unit 1.
FIG. 4 is a refrigerant circuit diagram of the refrigeration cycle 31. The vehicle air conditioner of this embodiment is capable of a dehumidification mode in addition to the cooling mode and the heating mode. Indoor unit 1
The upstream heat exchanger 71 of the refrigeration cycle 31 is arranged on the entire upstream surface in the duct 2, and the downstream heat exchanger 72 of the refrigeration cycle 31 is arranged on the entire surface of the duct 2 downstream thereof.
Two electric heaters 73 are arranged in the duct 2 further downstream. This electric heater 73 is a PTC
The heater heats the air flowing in the duct 2 according to the amount of electricity supplied. In addition to the upstream heat exchanger 71 and the downstream heat exchanger 72 described above, the refrigeration cycle 31 of the present embodiment has an outdoor heat exchanger 33, a refrigerant compressor 34, a cooling capillary tube 43, and a heating capillary tube 44. , A dehumidifying capillary tube 74, an accumulator 36, and a four-way valve 37, which are connected by a refrigerant pipe 38. Then, the upstream heat exchanger 71 in the refrigeration cycle 31 of the present embodiment operates only as a refrigerant evaporator in the cooling mode and the dehumidification mode, and the downstream heat exchanger 72 operates as a refrigerant evaporator in the cooling mode. Operates as a refrigerant condenser in heating mode and dehumidifying mode. That is, in the present embodiment, the downstream heat exchanger 72
In the indoor heat exchanger according to the present invention, the cold heat source mode according to the present invention is a cooling mode in which a low temperature refrigerant (cooling heat source) flows in the downstream heat exchanger 72, and the hot heat source according to the present invention The modes are a heating mode and a dehumidifying mode in which a high-temperature refrigerant (heat source) flows through the downstream heat exchanger 72.

The dehumidifying capillary tube 74 is a refrigerant pipe 3 connecting the upstream heat exchanger 71 and the downstream heat exchanger 72.
The fixed throttle provided in FIG. 8 decompresses and expands the refrigerant flowing from the downstream heat exchanger 72 to the upstream heat exchanger 71 during the dehumidifying operation. A reversible electromagnetic valve 75 is provided in parallel with the dehumidifying capillary tube 74. The reversible solenoid valve 75 always allows the flow of the refrigerant from the upstream heat exchanger 71 to the downstream heat exchanger 72, and the refrigerant flow from the downstream heat exchanger 72 to the upstream heat exchanger 71 is The flow of the refrigerant is allowed according to the instruction of the control device 50. A bypass passage 76 for dehumidification is branched from the middle of the pipe between the upstream heat exchanger 71 and the cooling capillary tube 43, and the other end of the bypass passage 76 is between the four-way valve 37 and the accumulator 36. It is connected. An electromagnetic opening / closing valve 77 is provided in the bypass passage 76 to allow the flow of the refrigerant in accordance with the instruction from the control device 50.

When the control device (not shown) in this embodiment switches from the cooling mode (cooling heat source mode) to the heating mode (heating heat source mode) or the dehumidifying mode (heating heat source mode) by operating an operation panel (not shown). The transparent conductive thin film (see the first embodiment) is programmed to be energized by the same operation as in the first embodiment.

[Modification] In the above-described embodiment, an example in which the refrigerant compressor is gradually operated when the cold heat source mode is switched to the hot heat source mode is shown. As shown in the parentheses, when the cold heat source mode is switched to the warm heat source mode, the blowing operation may be performed at first, and then the refrigerant compressor may be operated to perform the warm heat source mode operation. In the above embodiment, an example of stopping the energization of the transparent conductive thin film by time is shown, but when the temperature of the indoor heat exchanger reaches a predetermined temperature, or the humidity passed through the indoor heat exchanger is below a predetermined humidity. The power supply to the transparent conductive thin film 24 may be stopped when other conditions such as a decrease are reached. Also in this case, it may be arranged such that the energization of the transparent conductive thin film is stopped after a lapse of a predetermined time after the conditions are achieved. In the present embodiment, an example in which the cold heat source mode and the hot heat source mode are switched by manual switching is shown, but the invention may be applied to an air conditioner that switches the cold heat source mode and the warm heat source mode by automatic control. In this embodiment,
Although the example in which the thin film energizing means is incorporated in the control device for controlling the air conditioner is shown, it may be provided independently of the control device. The example in which the outside air is introduced when the transparent conductive thin film is energized when the cold heat source mode is switched to the warm heat source mode has been described, but the outside air may not be introduced. Similarly, when the transparent conductive thin film is energized when the cold heat source mode is switched to the hot heat source mode, the refrigerant compressor is temporarily stopped and the rotation speed is gradually increased, but it is operated at a constant rotation speed. The rotation speed may be increased stepwise, or may be increased from the intermediate rotation speed. Although a refrigeration cycle using a refrigerant as a medium has been described as an example in the embodiments, it may be applied to a refrigeration cycle using air or water as a medium.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a vehicle air conditioner. (First embodiment).

FIG. 2 is a block diagram of a control device (first embodiment).

FIG. 3 is a plan view of an operation panel (first embodiment).

FIG. 4 is a flowchart showing the operation of the vehicle air conditioner (first embodiment).

FIG. 5 is a time chart showing an increase in rotation speed of the refrigerant compressor (first embodiment).

FIG. 6 is a time chart for explaining the operation of the first embodiment (first embodiment).

FIG. 7 is a schematic configuration diagram of an indoor unit (second embodiment).

FIG. 8 is a refrigerant circuit diagram of the air conditioner (second embodiment).

[Explanation of symbols]

2 duct 4 blower 24 transparent conductive thin film 32 indoor heat exchanger 50 control device (thin film energizing means) 55 air conditioning mode setting switch group (switching means) 72 downstream heat exchanger (indoor heat exchanger in the second embodiment)

Claims (1)

[Claims] 1. (a) a duct for sending air toward the interior of a vehicle; (b) a blower for producing an air flow toward the interior of the duct in the duct; (c) a cooler disposed in the duct. Indoor heat exchanger that cools or heats the air passing through the duct through a heat source or a heat source, and (d) a transparent conductive member that is provided in the window glass of the vehicle and that heats the window glass when energized. Thin film, (e) switching means capable of switching between a cold heat source mode in which a cold heat source passes through the indoor heat exchanger and a warm heat source mode in which a warm heat source passes through the indoor heat exchanger, and (f) An air conditioner for a vehicle, comprising: a thin film energizing unit that energizes the transparent conductive thin film when the switching unit switches from the cold heat source mode to the warm heat source mode.