JPH06247135A - Heat pump type air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To confirm defrosting operation surely by displaying the starting of defrosting operation on a display unit prior to the starting of the defrosting operation, displaying that it is in the defrosting operation in the defrosting operation, and displaying that the operation is finished soon prior to the finishing of the defrosting. CONSTITUTION:A defrosting control device 21 detects the frosting at the detecting temperature of an outdoor heat exchanger temperature detecting sensor 24, and carries out a defrosting operation. In this case, prior to the starting of the defrosting operation, a heating operation display unit 23 is flashed for a specific time by a display flashing control device 28, and the voice that the defrosting operation is starting is output through a voice composing output device 30 and a speaker 29. And an indoor air blower 6, an indoor air blower for heat exchanger 3, and an electric motor driving device 9 are stopped. And the defrosting operation is started by converting a four-way change-over valve 7 to a cooling operation side, the heating operation display unit 23 is flashed slowly, and the voice is output through the speaker 29. When the finishing time of the defrosting operation is approached, the flashing is made in a rapid flashing, and it is reported also by the voice output.

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 for heating a vehicle with a heat pump and automatically performing a defrosting operation.

[0002]

2. Description of the Related Art In a conventional fuel-driven automobile air conditioner, for example, as shown in the concrete structure of FIG. After the heat is radiated to the air outside the vehicle compartment to condense and liquefy the refrigerant by the air conditioner 2 and the outdoor heat exchanger blower 3, the refrigerant is guided to the indoor heat exchanger 5 via the refrigerant expansion device 4, and the indoor blower 6 The air blown by is evaporated while cooling and the cooling action is performed.

The heating action is to stop the compressor 1 and let the engine cooling water (warm water) flow through the heater core 15 to heat the air blown by the indoor blower 6.

The temperature of the air blown from the vehicle interior air outlets 10, 11, 12 is adjusted by adjusting the opening of the mix damper 16 arranged in the ventilation duct 20.
This is performed by adjusting the amounts of warm air flowing through the heater core 15 and cold air bypassing the heater core 15. Further, the compressor 1 is driven by the engine, and the air cooled by the indoor heat exchanger 5 is reheated by the heater core 15, so that dehumidifying and heating can be performed. Further, by using the mix damper 16, it is possible to continuously change the blowout temperature from cooling to heating and vice versa.

On the other hand, a heat pump type air conditioner for driving a compressor by an electric motor, for example, an air conditioner for an electrically driven automobile is shown in FIG.
Shown in. The cooling action is similar to the above, but since there is no cooling water (hot water) for the engine in the heating action, the four-way switching valve 7 is used downstream of the compressor 1 to reverse the refrigerant flow path, and the indoor heat exchanger is used. After heating the air blown by the indoor air blower 6 to condense and liquefy the refrigerant, the refrigerant is guided to the outdoor heat exchanger 2 via the refrigerant expansion device 4, where the air outside the vehicle is cooled. At the same time, heat pump heating is performed in which the refrigerant absorbs heat and evaporates. Therefore, since there is no mix damper like the air-conditioning system for fuel-driven automobiles, the blow-out temperature is controlled by controlling the electric motor driving device 9 that drives the electric motor 8 by the heating / cooling operation capacity adjusting device 25.
The rotation speed of the compressor 1 is adjusted. The heating / cooling operation is switched by the heating / cooling operation switching device 26 using the four-way switching valve 7 to switch the refrigerant flow path. As for the display of heating / cooling, the heating / cooling operation switching device 26 causes the cooling operation indicator 22 or the heating operation indicator 23 to be displayed.

[0006]

When the heat pump heating operation is continuously performed for a long time in the heat pump type air conditioner, the outdoor heat exchanger cools air as described above.
When the humidity of the air outside the vehicle is high, frost adheres to the outdoor heat exchanger. Then, the air outside the vehicle compartment cannot pass through the outdoor heat exchanger where the frost increases. Therefore, the heat exchange between the outdoor heat exchanger and the air outside the vehicle compartment cannot be performed, and the heating function cannot be performed. Therefore, in order to continue the heating operation, it is necessary to perform so-called defrosting operation for removing frost.

The defrosting operation is performed by the defrosting control device 21 as follows. Whether or not frost is formed is determined based on the temperature detected by the outdoor heat exchanger temperature detection sensor 24, and when it is determined that frost is formed, the following operation is performed.

The indoor blower 6 and the outdoor heat exchanger blower 3 are stopped. The compressor 1 is temporarily stopped by the electric motor drive device 9, and the refrigerant flow path is switched using the four-way switching valve 7. The compressor 1 is restarted by the electric motor drive device 9 and the compressor 1 is restarted.
The refrigerant discharged from is introduced into the outdoor heat exchanger 2. Here, since the outdoor heat exchanger 2 is heated, the frost is melted. On the other hand, the refrigerant condenses. Next, the refrigerant is conveyed to the indoor heat exchanger 5 via the refrigerant expansion device 4, and the indoor heat exchanger 5 and the indoor heat exchanger 5
The surrounding air is cooled and evaporated. Here, the reason why the indoor blower 6 and the outdoor heat exchanger blower 3 are stopped is to prevent cold air from blowing into the passenger compartment and to quickly remove frost, respectively.

When the defrosting operation is finished and the heating operation is restarted, the compressor 1 is temporarily stopped and the four-way switching valve 7 is used to switch the refrigerant flow path. The indoor air blower 6 and the outdoor heat exchanger air blower 3 are operated, and the compressor 1 is restarted.

Therefore, when the defrosting operation is started, the indoor blower 6 and the outdoor heat exchanger blower 3 are stopped, and the compressor 1 is temporarily stopped. The heating function stops during the defrosting operation. Further, when the defrosting operation is finished and the heating operation is started, the indoor air blower 6 and the outdoor heat exchanger air blower 3 are activated, and the compressor 1
Stops and restarts.

On the other hand, in an electrically driven vehicle, the driving part thereof is an electric motor rather than an engine, as compared with the conventional fuel driven vehicle, so that the vehicle is quieter, and the indoor air blower 6 of the air conditioner and the outdoor heat exchanger air blower. The operating sounds of the device 3 and the compressor 1 are often heard.

Therefore, in the defrosting operation, the indoor blower 6,
Stopping and reactivating the outdoor heat exchanger blower 3 and the compressor 1 may cause a passenger to be surprised and may be surprised. Therefore, it is necessary to inform that the defrosting operation is being performed.

Therefore, an object of the present invention is to provide a heat pump type air conditioner for a vehicle, which can confirm that the operation is defrosting.

[0014]

In order to solve the above-mentioned problems, the present invention, as a first means, changes the display of the indicator during heating operation and starts the defrosting operation before performing the defrosting operation. Is displayed, that the defrosting operation is being performed during the defrosting operation, and that the defrosting operation is finished before the defrosting operation is finished to notify the occupant.

In the present invention, in order to solve the above-mentioned problems as a second means, in the first means, the display change of the indicator during heating operation is blinking of the display.

In order to solve the above-mentioned problems, the present invention audibly indicates that the defrosting operation is started before the defrosting operation is performed, and that the defrosting operation is performed during the defrosting operation. Informing the passenger that the defrosting operation will be completed before the defrosting operation is completed.

In order to solve the above-mentioned problems, the present invention, as a fourth means, gradually increases the number of revolutions of the compressor, the amount of air blown into the passenger compartment, and the amount of air blown to the outdoor heat exchanger at the start of the defrosting operation. When the defrosting operation is stopped and the heating operation is started, the rotational speed of the compressor, the amount of air blown into the passenger compartment, and the amount of air blown to the outdoor heat exchanger are gradually increased.

[0018]

According to the first means of the present invention, the display on the heating operation indicator is changed to indicate that the defrosting operation is started before the defrosting operation is performed, and during the defrosting operation. Indicates that the defrosting operation is in progress, and displays to the occupant that the defrosting operation is completed before the defrosting operation is completed. Therefore, since it is displayed that the defrosting operation is started, the indoor blower and the outdoor heat exchanger blower are stopped by the start of the defrosting operation, and it is determined that the occupant has a malfunction due to the compressor being temporarily stopped. Can prevent surprises. In addition, since the defrosting operation is displayed during the defrosting operation, it is possible to prevent the determination that the occupant is out of order because the heating operation is stopped. Furthermore, since it is displayed that the defrosting operation is completed before the defrosting operation is completed, the indoor blower and the outdoor heat exchanger blower are activated, and the compressor 1 is temporarily stopped and restarted. It is possible to prevent the driver from being surprised if he / she determines that the passenger is out of order.

In these cases, since the display indicating that the heating operation is in progress is used and the display is changed and displayed, it is not necessary to additionally provide the display for the defrosting operation, and the space,
You can save parts.

According to the second means of the present invention, in the first means, the display change of the display during heating operation is blinking of the display. Therefore, it is possible to easily display the distinction between prior to performing the defrosting operation, during the defrosting operation, and prior to the completion of the defrosting operation only by setting the blinking frequency to three types. Further, since the indicator during the heating operation is blinking, the occupant can intuitively know that the heating operation is in a special situation. Therefore, it is possible to further prevent the determination that the occupant is out of order.

According to the third means of the present invention, by voice,
To the occupant that the defrosting operation is started before the defrosting operation, that the defrosting operation is being performed during the defrosting operation, and that the defrosting operation is finished before the defrosting operation is finished. Inform. Therefore, an occupant who cannot always see the display, such as a driver, can be informed by voice, and further contribute to safe driving of the vehicle.

According to the fourth means of the present invention, when the defrosting operation is started, the number of revolutions of the compressor, the amount of air blown into the passenger compartment, and the amount of air blown to the outdoor heat exchanger are gradually reduced to perform the defrosting operation. When the heating is stopped and the heating operation is started, the rotation speed of the compressor, the amount of air blown into the vehicle interior, and the amount of air blown to the outdoor heat exchanger are gradually increased. Therefore, the operating noise of the air blower for the air conditioner, the air blower for the outdoor heat exchanger, and the compressor gradually changes at the start of the defrosting operation, when the defrosting operation is stopped and when the heating operation is started, and suddenly. It never disappears or occurs, and it is possible to prevent the driver from being ascertained that he / she is out of order.

[0023]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a vehicle heat pump type air conditioner according to an embodiment of the present invention. Here, the difference from the configuration diagram of the conventional heat pump type air conditioner for a vehicle shown in FIG. 4 is that the embodiment of the present invention is different from the conventional example shown in FIG. 4 in that the display blinking control device 28, the speaker 29, and the voice synthesis output device. That is, 30 is added.

When heating the passenger compartment, the four-way switching valve 7 is set as shown by the solid line in FIG. The discharged refrigerant is guided to the indoor heat exchanger 5 by the compressor 1. Next, the air blown by the indoor air blower 6 is heated to condense and liquefy the refrigerant, which is then conveyed to the outdoor heat exchanger 2 via the refrigerant expansion device 4 and blown by the outdoor heat exchanger air blower 3. Cool the air and evaporate.

FIG. 2 shows an operation diagram of a vehicle heat pump type air conditioner according to an embodiment of the present invention. The operation is as follows.

When the heat pump heating operation is continuously performed for a long time, the outdoor heat exchanger cools the air. Therefore, when the humidity of the vehicle outdoor air is high, frost adheres to the outdoor heat exchanger.

The defrost control device 21 determines the presence or absence of frost on the basis of the temperature detected by the outdoor heat exchanger temperature detection sensor 24, and when it is determined that frost is present, each device is operated as follows. Activate.

Before starting the defrosting operation, the display blinking control device 28 blinks the heating operation indicator 23 for a predetermined time as shown in FIG. Further, as shown in FIG. 2, a continuous sound of “Begin defrosting operation” and “beep” is output from the speaker 29 by the voice synthesis output device 30. As shown in FIG. 2, the blowing speed and the rotation speed of the compressor 1 are gradually lowered by the indoor blowing device 6, the outdoor heat exchanger blowing device 3, and the electric motor driving device 9 to stop.

Next, the defrosting operation is started. When the blowing and the rotation speed of the compressor 1 are stopped, the four-way switching valve 7 is used to switch the refrigerant flow path to the cooling operation side indicated by the broken line in FIG.
The compressor 1 is gradually restarted by the motor drive device 9 as shown in FIG. 2, and the refrigerant discharged from the compressor 1 is guided to the outdoor heat exchanger 2. Here, since the outdoor heat exchanger 2 is heated, the frost is melted. On the other hand, the refrigerant condenses. Next, the refrigerant is carried to the indoor heat exchanger 5 via the refrigerant expansion device 4, and cools and evaporates the indoor heat exchanger 5 and the air around the indoor heat exchanger 5. Here, since the indoor air blower 6 and the outdoor heat exchanger air blower 3 remain stopped, no cold air is blown into the vehicle interior, and the frost is quickly removed.

During this defrosting operation, the display blinking control device 28
Then, the heating operation indicator 23 is made to blink more slowly than the blinking before the defrosting operation is started as shown in FIG. In addition, a continuous sound of "pip" that is "defrosting operation in progress" and slower than before defrosting operation is started is output from the speaker 29 by the voice synthesis output device 30.

Near the end of the defrosting operation, as shown in FIG. 2, a predetermined time before the heating operation is restarted, the display blinking control device 28 causes the heating operation indicator 23 to blink faster than before the defrosting operation is started. Make it blink. In addition, the speaker 29 outputs the continuous sound of "bit", which is "starting the heating operation" and faster than before entering the defrosting operation, by the voice synthesis output device 30.

As shown in FIG. 2, the rotation speed of the compressor 1 is gradually lowered by the electric motor drive device 9 and stopped.

When the heating operation is restarted, the refrigerant flow path is switched to the heating operation side indicated by the solid line in FIG. 1 by using the four-way switching valve 7 in a state in which the blowing and the rotation speed of the compressor 1 are stopped. After the heating operation is restarted as shown in FIG. 2, the display blinking control device 28 is stopped and the heating operation indicator 23 is turned on.

The blower and the rotation speed of the compressor 1 are as shown in FIG.
The indoor blower 6, the outdoor heat exchanger blower 3, and the electric motor drive 9 are gradually raised to operate.

As described above, the occupant can confirm that the defrosting operation is being performed without erroneously determining a failure or being surprised.

In addition, the display change of the display during heating operation, voice,
The number of revolutions of the compressor, the amount of air blown into the vehicle compartment, and the amount of air blown to the outdoor heat exchanger are not limited to those in this embodiment, and various methods are possible within the scope of the gist of the present invention. Further, the predetermined time may be an appropriate time for being sensed by the occupant.

With respect to the arrangement, number and structure of heat exchangers, various applications are possible within the scope of the gist of the present invention.

[0039]

According to the first aspect of the present invention, since it is displayed that the defrosting operation is started, the indoor air blower and the outdoor heat exchanger air blower are stopped by the start of the defrosting operation, and the compressor is It is possible to prevent the driver from being surprised if he / she decides that the occupant is out of order. In addition, since the defrosting operation is displayed during the defrosting operation, it is possible to prevent the determination that the occupant is out of order because the heating operation is stopped. Furthermore, since it is displayed that the defrosting operation is completed before the defrosting operation is completed,
The indoor blower and the blower for the outdoor heat exchanger are activated, and the compressor 1 can be stopped and restarted, so that it is possible to prevent the occupant from deciding and being surprised.

In these cases, since the display indicating that the heating operation is in progress is used and the display is changed and displayed, it is not necessary to additionally provide the display for the defrosting operation, and the space,
You can save parts.

According to the second aspect of the present invention, for example, simply by changing the blinking frequency to three types, before the defrosting operation,
During the defrosting operation, the distinction before the defrosting operation ends can be displayed. Further, since the indicator during the heating operation is blinking, the occupant can intuitively know that the heating operation is in a special situation. Therefore, it is possible to further prevent the determination that the occupant is out of order.

According to the means of claim 3, the defrosting operation indicates that the defrosting operation is started before the defrosting operation is performed and that the defrosting operation is being performed during the defrosting operation. Inform passengers that the defrosting operation will be completed before the operation is completed. Therefore,
The occupant who cannot always see the display, such as a driver, can be notified by voice, and further contribute to safe driving of the vehicle.

According to the means of claim 4, the operation noise of the indoor air blower of the air conditioner, the air blower for the outdoor heat exchanger, and the compressor is such that the defrosting operation is stopped and the heating operation is started at the start of the defrosting operation. It gradually changes when it starts, and does not suddenly disappear or occur, and it is possible to prevent the driver from being ascertained as a malfunction and being surprised.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a vehicle heat pump type air conditioner according to an embodiment of the present invention.

FIG. 2 is an operation waveform diagram of a vehicle heat pump type air conditioner according to an embodiment of the present invention.

FIG. 3 is a configuration diagram of a conventional air conditioner for a vehicle driven by a fuel engine.

FIG. 4 is a configuration diagram of a conventional vehicle heat pump type air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Outdoor heat exchanger 3 Blower for outdoor heat exchanger 4 Refrigerant expansion device 5 Indoor heat exchanger 6 Indoor blower 7 Four-way switching valve 8 Electric motor 9 Electric motor drive 10 Vent outlet 11 Heat outlet 12 Defrost blow Outlet 13 Bent / heat outlet switching damper 14 Defrost outlet outlet damper 15 Heater core 16 Mix damper 17 Outside vehicle air introducing port 18 Vehicle interior air introducing port 19 Introducing air switching damper 20 Ventilation duct 21 Defrost control device 22 Cooling operation indicator 23 Heating operation indicator 24 Outdoor heat exchanger temperature detection sensor 25 Heating / cooling operation capacity adjusting device 26 Heating / cooling operation switching device 27 Engine 28 Display blink control device 29 Speaker 30 Speech synthesis output device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location F25B 49/02 B 8919-3L

Claims (4)

[Claims] 1. A heat pump is used for at least heating operation, and an indicator indicating that heating operation is in progress is provided, which is for melting frost adhering to the outdoor heat exchanger based on the temperature of the outdoor heat exchanger. In a vehicle heat pump type air conditioner that automatically performs defrosting operation, the display of the heating operation indicator is changed to indicate that the defrosting operation is started before performing the defrosting operation, and the defrosting operation is performed. A heat pump type air conditioner for a vehicle, which displays that a defrosting operation is being performed during operation and informs an occupant that the defrosting operation is finished before the defrosting operation is finished. 2. The heat pump type air conditioner for a vehicle according to claim 1, wherein the display change of the display during heating operation is blinking of the display. 3. A heat pump type for a vehicle which performs at least heating operation with a heat pump and automatically performs defrosting operation for melting frost adhering to the outdoor heat exchanger based on the temperature of the outdoor heat exchanger and the like. In the air conditioner, the voice indicates that the defrosting operation is started before performing the defrosting operation, that the defrosting operation is in progress during the defrosting operation, and that the defrosting operation is performed before the defrosting operation ends. A heat pump type air conditioner for a vehicle, which informs an occupant that the operation is completed. 4. A heat pump type for a vehicle, which performs at least heating operation with a heat pump and automatically performs defrosting operation for melting frost adhering to the outdoor heat exchanger based on the temperature of the outdoor heat exchanger and the like. In the air conditioner, the number of rotations of the compressor at the start of the defrosting operation, the amount of air blown into the passenger compartment, and the amount of air blown to the outdoor heat exchanger are gradually reduced, and compressed when the defrosting operation is stopped and the heating operation is started. The number of rotations of the machine, the amount of air blown into the passenger compartment,
A vehicle heat pump type air conditioner characterized by gradually increasing the amount of air blown to the outdoor heat exchanger.