JPH08156580A - Heat pump type heating, cooling and dehumidifying control device for electric vehicle - Google Patents

Abstract

PURPOSE: To materialize an energy saving operation for an air conditioner by providing an air conditioner operation means with an operation mode setting means setting an operation mode for the revolution speed of a motor driven compressor, and with a revolution speed reducing means which reduces its revolution speed operated by a revolution speed operating means when an operation mode is set by the operation setting means. CONSTITUTION: When the blow-off temperature of air fed into a cabin is changed while a cooling operation is being carried out with a cooling switch tuned on, out of a control mode selection switch 24, the revolution speed of a motor driven compressor 25 is changed so as to allow the amount of circulating coolant to be increased/ decreased. In this case, the output temperature signal of a temperature setting unit 32 is inputted into a revolution speed operating means 33, and when the output signal is in a cooling mode, the revolution speed corresponding to the output temperature signal of the temperature setting unit 32, is operated. The operated revolution speed is then inputted into a revolution speed reducing means 9, and when an operation mode SW 19 is set so as to be operated, the revolution speed is then reduced so as to be inputted into a revolution speed output means 34, and the revolution speed of the motor driven compressor 25 is thereby reduced via an inverter 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump cooling / heating / dehumidifying control device for an electric vehicle that air-conditions the interior of the electric vehicle.

[0002]

2. Description of the Related Art A conventional heat pump cooling / heating / dehumidifying control device for an electric vehicle is, for example, as shown in the configuration diagram of FIG. 7, an electric compressor 25 having a built-in motor, an outside air heat exchanger 2, and the outside A bypass circuit 16 arranged to bypass the air heat exchanger 2, and the bypass circuit 16
A first three-way switching valve 17 arranged on the inlet side of the vehicle, a second three-way switching valve 18 arranged on the outlet side of the bypass circuit 16 so as to be paired with the inlet side, and for a vehicle exterior air heat exchanger The air blower device 3 and the vehicle interior / external air introduction device 6 for selecting introduction of mixed air into the vehicle interior / outside the vehicle interior / outside
And a first ventilation circuit 28 connecting the vehicle interior air heat exchanger air blower 7, the vehicle interior air heat exchanger air blower 7 and the vehicle interior air outlet, and the first ventilation circuit 28. The first vehicle interior air heat exchanger 26 and the first ventilation circuit 2
8, a second ventilation circuit 29 that branches from the downstream side of the first vehicle interior air heat exchanger 26 and merges with the first ventilation circuit 28 again, the first ventilation circuit 28, and the second ventilation circuit 29. Ventilation circuit switching damper 30 for switching the ventilation circuit 29 of 2
A ventilation circuit switching actuator 23 for driving the ventilation circuit switching damper 30; and the second ventilation circuit 29.
A second vehicle interior air heat exchanger 14 disposed inside, a four-way switching valve 22, a refrigerant pipe 31 connecting the electric compressor 25, the heat exchangers, and the four-way switching valve 22, and the first
First refrigerant expansion device 15 arranged in the refrigerant pipe 31 between the vehicle interior air heat exchanger 26 and the second vehicle interior air heat exchanger 14, and the second vehicle interior air heat exchanger 14 In the heat pump cooling and heating dehumidification device for an electric vehicle, which is configured by the second refrigerant expansion device 27 arranged in the refrigerant pipe 31 between the vehicle exterior air heat exchanger 2, the motor of the electric compressor 25 is variably rotated. Inverter 21 driven by number
And a temperature setting means 32 using a variable VR for making settings corresponding to or related to the temperature of air blown into the passenger compartment in the air conditioning operation panel 10, and also in the air conditioning operation panel 10 in a cooling mode, a heating mode and a dehumidifying and heating mode. Three SWs (A / C SW, heating S
Control mode setting means 24 using W, dry SW)
And further, the air volume setting means 1 configured by SW for setting the air volume of the air ventilation device 7 for the vehicle interior air heat exchanger, and the vehicle interior air heat according to the SW position of the air volume setting means 1. The register 8 arranged downstream of the vehicle interior air heat exchanger blower 7 for variably driving the blower amount of the exchanger blower 7, the air conditioning control means 20, and the air conditioning control means 20 include the first Refrigerant expansion device 15, the second refrigerant expansion device 27, and the first three-way switching valve 1
7, output control means 35 for controlling the second three-way switching valve 18 and the ventilation circuit switching actuator 23, and an output temperature signal of the temperature setting means 32 based on a signal from the control mode selection SW 24. And a rotation speed output means 34 for outputting the rotation speed to the inverter 21 based on the rotation speed calculated by the rotation speed calculation means 33.

Therefore, when performing cooling,
The cooling SW of the control mode selection switch 24 in the air conditioning operation panel 10 is turned on, and based on this signal, the output control means 35 in the air conditioning control means 20 causes the ventilation circuit switching damper 30 to be in the position of D in FIG. The four-way switching valve so that the high-temperature, high-pressure refrigerant discharged from the electric compressor 25 flows to the vehicle exterior air heat exchanger 2 by controlling the ventilation circuit switching actuator 23 so that the air flows to the first ventilation circuit 28). Two
2 is switched to the circuit shown by the solid line, and the first three-way switching valve 17
And the second three-way switching valve 18 are switched to the circuit shown by the solid line so that the refrigerant flows to the vehicle exterior air heat exchanger 2, and the first refrigerant expansion device 15 is fully opened (no expansion), and the second The refrigerant expansion device 27 is set to have a restriction. Therefore, the refrigerant discharged from the electric compressor 25 is transferred to the four-way switching valve 2
After passing through 2, the vehicle exterior air heat exchanger 2 and the vehicle exterior air heat exchanger blower 3 radiate heat to the vehicle exterior air to condense and liquefy the refrigerant, and then the second refrigerant expansion device 27. The air is depressurized and led to the second vehicle interior air heat exchanger 14, the first refrigerant expansion device 15, and the first vehicle interior air heat exchanger 26, where the vehicle interior air heat exchanger blower device 7 is used for the vehicle interior or the vehicle. The outdoor air is cooled and dehumidified and evaporated to perform a cooling action, and the cooled air flows through the first ventilation circuit 28 and is supplied into the vehicle interior.

When it is desired to change the blowout temperature of the air supplied to the vehicle compartment, the blowout temperature is controlled by changing the rotation speed of the electric compressor 25 and increasing or decreasing the refrigerant circulation amount. Therefore, as shown in FIG. 7, the output temperature signal of the temperature setter 32 is used as the rotation speed calculation means 33 in the air conditioning control means 20.
The output signal from the control mode setting means 24 is input to the rotation speed calculating means 33 as shown in FIG.
In the case of the cooling mode, the characteristic curve of A is referred to, the rotation speed corresponding to the output temperature signal of the temperature setter 32 is calculated,
It outputs to the rotation speed output means 34. Rotation speed output means 34
Outputs a signal of this rotation speed to the inverter 21, and the inverter 21 drives the electric compressor 25 at this designated rotation speed. Therefore, during cooling, the output temperature signal of the temperature setting device 32 is low (the lever of the temperature setting device 32 is
(LD side), the rotation speed of the electric compressor 25 increases, the refrigerant circulation amount increases, the temperature at which air blows into the passenger compartment decreases, and conversely, the output temperature signal of the temperature setter 32 rises to a high temperature. When it is a signal (on the lever HOT side of the temperature setting device 32), the rotation speed of the electric compressor 25 decreases, the refrigerant circulation amount decreases, and the temperature of air blown into the passenger compartment rises.

On the other hand, when heating is performed, the heating S of the control mode selection SW 24 in the air conditioning operation panel 10 is operated by an operation.
W is turned on, and based on this signal, the output control means 35 in the air conditioning control means 20 has the ventilation circuit switching damper 30 shown in FIG.
The ventilation circuit switching actuator 23 is controlled so as to be in the position of C (the wind flows to the second ventilation circuit 29), and the four-way switching valve 22 is reversed (indicated by a broken line) from the refrigerant flow passage during cooling. In the same manner as during cooling, the throttle of the first refrigerant expansion device 15 is opened (no expansion) and the throttle of the second refrigerant expansion device 27 is opened. Further, the first three-way switching valve 17 and the second three-way switching valve 18 are switched to a solid line circuit so that the refrigerant passes through the vehicle exterior air heat exchanger 2.

Therefore, the refrigerant discharged from the electric compressor 25 passes through the four-way switching valve 22 and is supplied to the first vehicle interior air heat exchanger 26 and the second vehicle interior air heat exchanger 14 under high pressure and high temperature conditions. After radiating heat to indoor air to condense and liquefy the refrigerant,
The refrigerant is guided to the vehicle exterior air heat exchanger 2 via the second refrigerant expansion device 27, and heat pump heating is performed in which the refrigerant absorbs and evaporates while cooling and dehumidifying the air inside and outside the vehicle.

When it is desired to change the blowout temperature of the air supplied to the passenger compartment, the blowout temperature is controlled by changing the rotation speed of the electric compressor 25 and increasing or decreasing the refrigerant circulation amount, as in the case of cooling. . Therefore, as shown in FIG. 7, the output temperature signal of the temperature setting device 32 is input to the rotation speed calculation means 33 in the air conditioning control means 20, and the rotation speed calculation means 33 controls the rotation speed calculation means 33 as shown in FIG. When the output signal from the mode setting means 24 is in the heating mode, the characteristic curve of B is referred to, the rotation speed corresponding to the output temperature signal of the temperature setting device 32 is calculated, and the calculated rotation speed is output to the rotation speed output means 34. . The rotation speed output means 34 outputs a signal of this rotation speed to the inverter 21, and the inverter 21 drives the electric compressor 25 at this instructed rotation speed. Therefore, during heating, the temperature setter 32
Output temperature signal is low (the lever of temperature setting device 32 is CO
(LD side) When it is a temperature signal, the rotation speed of the electric compressor 25 decreases, the refrigerant circulation amount decreases, the temperature of air blown into the vehicle interior decreases, and conversely, the output temperature signal of the temperature setter 32 changes. When the signal is a high temperature (the lever of the temperature setting device 32 is on the HOT side), the rotation speed of the electric compressor 25 increases, the amount of refrigerant circulation increases, and the temperature at which air blows into the passenger compartment rises.

When performing dehumidifying heating, the dry SW of the control mode selection SW 24 in the air conditioning operation panel 10 is operated by an operation.
The air conditioning control means 20 controls the ventilation circuit switching actuator 23 so that the ventilation circuit switching damper 30 is in the position of C in FIG. 5 (the wind flows to the second ventilation circuit 29), and the four-way switching is performed. The valve 22 is switched to the circuit shown by the solid line, the first refrigerant expansion device 15 is in the throttled state, and the second refrigerant expansion device 27 is in the open state (the state without the throttle). Further, the first three-way switching valve 17 and the second three-way switching valve 18 are switched to a state in which the refrigerant bypasses the vehicle exterior air heat exchanger 2. Therefore, since the refrigerant discharged from the electric compressor 25 enters the second vehicle interior air heat exchanger 14 under high pressure and high temperature, the temperature of the second vehicle interior air heat exchanger 14 becomes high and heat is radiated to the vehicle interior air. Then, after the refrigerant is condensed and liquefied, it is guided to the first refrigerant expansion device 15, liquefied and becomes low pressure, and the refrigerant is cooled and dehumidified by the first vehicle interior air heat exchanger 26 while cooling and dehumidifying the air. Absorbs heat, evaporates, and returns to the electric compressor 25. Therefore, in terms of wind flow,
Air inside and outside the vehicle is guided by the air blower 7 for the vehicle interior air heat exchanger, cooled and dehumidified by the first vehicle interior air heat exchanger 26, and then reheated by the second vehicle interior air heat exchanger 14. , Radiates heat into the passenger compartment and performs dehumidifying and heating.

When it is desired to change the blowout temperature of the air supplied to the vehicle compartment, the blowout temperature is controlled by changing the rotational speed of the electric compressor 25 and increasing or decreasing the amount of refrigerant circulation, as described above. Therefore, as shown in FIG. 7, the output temperature signal of the temperature setting device 32 is input to the rotation speed calculation means 33 in the air conditioning control means 20, and the rotation speed calculation means 33 controls the rotation speed calculation means 33 as shown in FIG. When the output signal from the mode setting means 24 is in the dehumidifying and heating mode, the characteristic curve of C is referred to, the rotation speed corresponding to the output temperature signal of the temperature setting device 32 is calculated, and output to the rotation speed output means 34. To do. The rotation speed output means 34 outputs a signal of this rotation speed to the inverter 21, and the inverter 21 drives the electric compressor 25 at this instructed rotation speed. Therefore, during heating, the temperature setter 3
When the output temperature signal of 2 is a low temperature signal (the lever of the temperature setting device 32 is on the COLD side), the rotation speed of the electric compressor 25 decreases, the refrigerant circulation amount decreases, and the temperature at which air blows into the vehicle interior is On the contrary, the output temperature signal of the temperature setting device 32 is high.
Side), the rotation speed of the electric compressor 25 increases, the amount of refrigerant circulation increases, and the temperature at which air blows into the passenger compartment rises.

[0010]

As described above, in the heat pump type dehumidifying cooling / heating apparatus for an electric vehicle, when passing a vehicle in an electric vehicle or climbing a slope,
In situations where a large amount of power is used, or when it is desired to reduce the power consumed for air conditioning when the battery level is low,
In order to reduce the power consumption of the air conditioning, if the set temperature is raised in the cooling mode and the set temperature is lowered in the heating mode, the rotation speed of the electric compressor will decrease and it will be almost proportional to the rotation speed of the electric compressor. Power consumption is reduced and effective, but for users who do not have specialized knowledge, operations such as lowering power consumption by operating the set temperature are generally not expected, and as with the above, concentrate on driving. It was difficult to do.

Therefore, the present invention provides a heat pump cooling / heating dehumidification control device for an electric vehicle, which enables a general user to easily operate the power-saving operation of the air conditioner, and further realizes an effective energy saving at a low cost. The purpose is to provide.

[0012]

[Means for Solving the Problems]

(Claim 1) As a first means, in order to solve the above problems, in a heat pump cooling and heating dehumidifying device for an electric vehicle, an electric compressor having a built-in motor and a motor of the electric compressor are energized. An inverter that drives the electric compressor at a variable rotation speed, an air-conditioning control unit that instructs the inverter to the rotation speed of the electric compressor, and at least a blowout temperature or a rotation of the electric compressor with respect to the air-conditioning control unit. The number of rotations for calculating the number of rotations corresponding to the setting signal related to the blowout temperature from the air conditioning operation means or the number of rotations of the electric compressor in the air conditioning operation means for performing setting related to the number and the air conditioning control means. An operation mode setting means for setting the operation mode of at least the number of revolutions of the electric compressor in the air conditioning operation means; The stage, when the operation mode setting means is set, and a rotational speed reduction means for reducing the rotational speed Ne that is calculated by said rotational speed calculation means.

(Claim 2) In order to solve the above problems as a second means, the present invention is provided with an operation mode setting means as the first means and the rotation speed reducing means in the first means. At this time, the greater the number of revolutions calculated by the number-of-revolutions calculation means, the greater the degree of reduction of the number of revolutions calculated by the number-of-revolutions calculation means.

(Claim 3) As a third means, in order to solve the above problems, the rotation speed reducing means is calculated by the rotation speed calculating means when the operation mode setting means is set. We decided to limit the upper limit of the number of rotations.

[0015]

According to the first means of the present invention, the operation mode setting means for setting at least the operation mode of the rotation speed of the electric compressor in the air conditioning operation means, and the operation mode setting means in the air conditioning control means. When is set, since it is equipped with a rotation speed reduction means for reducing the rotation speed calculated by the rotation speed calculation means, overtaking the vehicle in the electric vehicle,
Or the situation where a large amount of electric power is used on an uphill slope,
Alternatively, in a situation where it is desired to reduce the power consumption for air conditioning when the remaining battery level is low, in order to reduce the power consumption of the air conditioning, by operating the operation mode setting means, the rotation speed reducing means causes the rotation speed calculating means to operate. Since the rotation speed calculated by the above is reduced, the power consumption of the air conditioning can be reduced.

According to the second means of the present invention, the first means and the rotation speed reducing means in the first means are calculated by the rotation speed calculating means when the operation mode setting means is set. As the number of revolutions increases, the degree of reducing the number of revolutions calculated by the number-of-revolutions calculation unit is increased. Therefore, in particular, as the number of revolutions calculated by the number-of-revolutions calculation unit becomes higher, Since the number of rotations is reduced to a large extent, it is possible to significantly reduce the power consumption in the high rotation region of the electric compressor.

According to the third means of the present invention, the first means and the rotation speed reducing means in the first means are calculated by the rotation speed calculating means when the operation mode setting means is set. Since the upper limit of the rotation speed is limited, it can be limited to at least a predetermined power consumption or less.

[0018]

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

FIG. 1 is a block diagram of an embodiment of a heat pump cooling / heating / dehumidifying control device for an electric vehicle according to the present invention.

As shown in the configuration diagram of FIG. 1, an electric compressor 25 having a built-in motor, a vehicle exterior air heat exchanger 2, and a bypass circuit arranged so as to bypass the vehicle exterior air heat exchanger 2. 16, a first three-way switching valve 17 arranged on the inlet side of the bypass circuit 16, and a second three-way switching valve 18 arranged on the outlet side of the bypass circuit 16 so as to form a pair with the inlet side. , Blower 3 for outside air heat exchanger
And a vehicle interior / exterior air introduction device 6 for selecting introduction of mixed air into the vehicle interior, vehicle exterior, or vehicle interior / exterior, vehicle interior air heat exchanger air blower 7, and vehicle interior air heat exchanger air blower 7 First ventilation circuit 28 that connects the air outlet to the vehicle interior
A first passenger compartment air heat exchanger 26 arranged in the first ventilation circuit 28, and a branch of the first ventilation circuit 28 from a downstream side of the first passenger compartment air heat exchanger 26. Then, the second ventilation circuit 2 that joins the first ventilation circuit 28 again
9, the first ventilation circuit 28 and the second ventilation circuit 2
9, a ventilation circuit switching damper 30, a ventilation circuit switching actuator 23 for driving the ventilation circuit switching damper 30, and a second vehicle interior air heat exchanger arranged in the second ventilation circuit 29. 14 and four-way switching valve 22
A refrigerant pipe 31 connecting the electric compressor 25, the heat exchangers, and the four-way switching valve 22, between the first vehicle interior air heat exchanger 26 and the second vehicle interior air heat exchanger 14. First refrigerant expansion device 15 arranged in the refrigerant pipe 31 of
And a second refrigerant expansion device 27 arranged in the refrigerant pipe 31 between the second vehicle interior air heat exchanger 14 and the vehicle exterior air heat exchanger 2, and a heat pump cooling and heating system for an electric vehicle. In the dehumidifier, a temperature setting means using an inverter 21 for driving the motor of the electric compressor 25 at a variable rotation speed and a variable VR for making a setting corresponding to or related to the temperature of the air blown into the vehicle interior in the air conditioning operation panel 10. 32, likewise the cooling mode in the air conditioning operation panel 10,
Three SWs (A / C SW, heating SW, dry S) for setting control modes of heating mode and dehumidifying heating mode
Control mode setting means 24 using W) and an operation mode SW1 for setting an operation mode of the electric compressor 25.
9. Further, according to the SW position of the air volume setting means 1 configured by a SW for setting the air volume of the air ventilation device 7 for the vehicle interior air heat exchanger, the vehicle interior air heat The register 8 arranged downstream of the vehicle interior air heat exchanger blower 7 for variably driving the blower amount of the exchanger blower 7, the air conditioning control means 20, and the air conditioning control means 20 include the first Refrigerant expansion device 15, the second refrigerant expansion device 27, and the first three-way switching valve 1
7, output control means 35 for controlling the second three-way switching valve 18, the ventilation circuit switching actuator 23, and an output temperature signal of the temperature setting means 32 based on a signal from the control mode selection SW 24. The rotation speed calculation means 33 for calculating the rotation speed corresponding to, and the rotation speed calculation means 33 when the operation mode SW 19 is set and operated.
Rotation speed reducing means 9 for reducing the rotation speed calculated by
And a rotation speed output means 34 for outputting the rotation speed to the inverter 21 based on the rotation speed calculated by the rotation speed reduction means 9.

Therefore, when performing cooling,
The cooling SW of the control mode selection switch 24 in the air conditioning operation panel 10 is turned on, and based on this signal, the output control means 35 in the air conditioning control means 20 causes the ventilation circuit switching damper 30 to be in the position of D in FIG. The four-way switching valve so that the high-temperature, high-pressure refrigerant discharged from the electric compressor 25 flows to the vehicle exterior air heat exchanger 2 by controlling the ventilation circuit switching actuator 23 so that the air flows to the first ventilation circuit 28). Two
2 is switched to the circuit shown by the solid line, and the first three-way switching valve 17
And the second three-way switching valve 18 are switched to the circuit shown by the solid line so that the refrigerant flows to the vehicle exterior air heat exchanger 2, and the first refrigerant expansion device 15 is fully opened (no expansion), and the second The refrigerant expansion device 27 is set to have a restriction. Therefore, the refrigerant discharged from the electric compressor 25 is transferred to the four-way switching valve 2
After passing through 2, the vehicle exterior air heat exchanger 2 and the vehicle exterior air heat exchanger blower 3 radiate heat to the vehicle exterior air to condense and liquefy the refrigerant, and then the second refrigerant expansion device 27. The air is depressurized and led to the second vehicle interior air heat exchanger 14, the first refrigerant expansion device 15, and the first vehicle interior air heat exchanger 26, where the vehicle interior air heat exchanger blower device 7 is used for the vehicle interior or the vehicle. The outdoor air is cooled and dehumidified and evaporated to perform a cooling action, and the cooled air flows through the first ventilation circuit 28 and is supplied into the vehicle interior.

When it is desired to change the blowout temperature of the air supplied to the passenger compartment, the blowout temperature is controlled by changing the rotation speed of the electric compressor 25 and increasing or decreasing the refrigerant circulation amount. Therefore, as shown in FIG. 1, the output temperature signal of the temperature setter 32 is used as the rotation speed calculation means 33 in the air conditioning control means 20.
The output signal from the control mode setting means 24 is input to the rotation speed calculation means 33, as shown in FIG.
In the case of the cooling mode, the straight line a-1 of the characteristic curve A is referred to, and the rotation speed corresponding to the output temperature signal of the temperature setter 32 is calculated. Next, the signal output from the rotation speed calculation means 33 is input to the rotation speed reduction means 9, and the operation mode SW19
When the setting operation is not performed, the rotation speed calculated by the rotation speed calculation means 33 is directly output to the rotation speed output means 34 without reducing the rotation speed. On the other hand, when the operation mode SW19 is set and operated, the rotation speed is reduced and output to the rotation speed output means 34, for example, as indicated by a straight line a-2 of the characteristic curve of A in FIG. The rotation speed output means 34 outputs a signal of this rotation speed to the inverter 21, and the inverter 21 drives the electric compressor 25 at this instructed rotation speed.

Therefore, in the cooling mode, when overtaking a car in an electric vehicle, or when climbing uphill, in a situation where a large amount of electric power is used, or in a situation where it is desired to suppress the electric power consumed for air conditioning when the battery level is low. In order to reduce the power consumption of the air conditioning, by setting the operation mode SW19, the rotation speed calculated by the rotation speed calculation means 33 by the rotation speed reduction means 9 is reduced, so that the power consumption of the air conditioning is reduced. You can

On the other hand, when heating is performed, the heating S of the control mode selection SW 24 in the air conditioning operation panel 10 is operated by an operation.
W is turned on, and based on this signal, the output control means 35 in the air conditioning control means 20 has the ventilation circuit switching damper 30 shown in FIG.
The ventilation circuit switching actuator 23 is controlled so as to be in the position of C (the wind flows to the second ventilation circuit 29), and the four-way switching valve 22 is reversed (indicated by a broken line) from the refrigerant flow passage during cooling. In the same manner as during cooling, the throttle of the first refrigerant expansion device 15 is opened (no expansion) and the throttle of the second refrigerant expansion device 27 is opened. Further, the first three-way switching valve 17 and the second three-way switching valve 18 are switched to a solid line circuit so that the refrigerant passes through the vehicle exterior air heat exchanger 2.

Therefore, the refrigerant discharged from the electric compressor 25 passes through the four-way switching valve 22 and is supplied to the first vehicle interior air heat exchanger 26 and the second vehicle interior air heat exchanger 14 under high pressure and high temperature conditions. After radiating heat to indoor air to condense and liquefy the refrigerant,
The refrigerant is guided to the vehicle exterior air heat exchanger 2 via the second refrigerant expansion device 27, and heat pump heating is performed in which the refrigerant absorbs and evaporates while cooling and dehumidifying the air inside and outside the vehicle.

When it is desired to change the blowout temperature of the air supplied to the vehicle compartment, the blowout temperature is controlled by changing the rotation speed of the electric compressor 25 and increasing / decreasing the refrigerant circulation amount as in the case of cooling. . Therefore, as shown in FIG. 1, the output temperature signal of the temperature setting device 32 is input to the rotation speed calculation means 33 in the air conditioning control means 20, and the rotation speed calculation means 33 controls the rotation speed calculation means 33, for example, as shown in FIG. When the output signal from the mode setting means 24 is the heating mode, the straight line b-1 of the characteristic curve B is referred to, and the rotation speed corresponding to the output temperature signal of the temperature setter 32 is calculated. Next, the signal output from the rotation speed calculation means 33 is input to the rotation speed reduction means 9, and when the operation mode SW 19 is not set and operated, the rotation speed calculation means 33 calculates the rotation speed without reducing the rotation speed. The rotation speed is output as it is to the rotation speed output means 34. on the other hand,
When the operation mode SW19 is set and operated, for example, as shown in FIG.
The rotation speed is reduced as indicated by the straight line b-2 of the characteristic curve B, and is output to the rotation speed output means 34. The rotation speed output means 34 outputs a signal of this rotation speed to the inverter 21,
The inverter 21 is driven by the electric compressor 2 at this designated rotation speed.
5 is driven.

Therefore, in the heating mode, as in the above-described cooling mode, when the electric vehicle overtakes, or climbs uphill, when a large amount of electric power is used or when the battery level is low, air conditioning is performed. In order to reduce the power consumption of the air conditioning in a situation where it is desired to suppress the consumed electric power, the rotational speed calculated by the rotational speed calculation means 33 by the rotational speed reduction means 9 is reduced by setting the operation mode SW19. The power consumption of air conditioning can be reduced.

In the dehumidifying and heating mode, the control operation and effects are the same as those described above except for the operation of the refrigeration cycle, and the description thereof will be omitted.

FIG. 3 is a block diagram of an embodiment of the heat pump cooling / heating / dehumidifying control device for an electric vehicle according to the present invention.

The description of the structure of the refrigeration cycle is the same as that of the embodiment of claim 1, so that the description is omitted. The configuration of the control system is substantially the same as that of the embodiment of claim 1, so that only the differences will be described.

The rotation speed reducing means 9 operates in the operation mode SW19.
When is set, the greater the number of rotations calculated by the number-of-revolutions calculation means 33, the greater the degree of reduction of the number of rotations calculated by the number-of-revolutions calculation means 33.

Therefore, in the cooling mode, as shown in FIG. 3, the output temperature signal of the temperature setting device 32 is input to the rotation speed calculation means 33 in the air conditioning control means 20, and this rotation speed calculation means 33 is input.
Is, for example, as shown in FIG.
When the output signal from is in the cooling mode, the straight line a-1 of the characteristic curve of A is referred to, and the rotation speed corresponding to the output temperature signal of the temperature setter 32 is calculated. Next, the rotation speed calculation means 3
The signal output from 3 is input to the rotation speed reducing means 9,
When the operation mode SW 19 is not set and operated, the rotation speed calculated by the rotation speed calculation means 33 is directly output to the rotation speed output means 34 without reducing the rotation speed. On the other hand, when the operation mode SW19 is set and operated,
For example, as indicated by the straight line a-2 of the characteristic curve of FIG. 2A, the higher the rotation speed calculated by the rotation speed calculation means 33, the more the rotation speed calculated by the rotation speed calculation means 33 is reduced. The degree is increased and the rotation speed output means 34
Output to. The rotation speed output means 34 outputs a signal of this rotation speed to the inverter 21, and the inverter 21 drives the electric compressor 25 at this instructed rotation speed.

Therefore, in the cooling mode, when overtaking a car in an electric vehicle, or when climbing uphill, when a large amount of electric power is used, or when it is desired to suppress the electric power consumed for air conditioning when the battery level is low. In order to reduce the power consumption of the air conditioning, the operation mode SW 19 is set and operated, and the degree of reduction is increased as the rotation speed calculated by the rotation speed calculation means 33 by the rotation speed reduction means 9 increases. Therefore, it is possible to greatly reduce the power consumption particularly under the use condition in which the power consumption of the air conditioning is relatively high.

In the heating mode, as shown in FIG. 3, the output temperature signal of the temperature setter 32 is input to the rotation speed calculation means 33 in the air conditioning control means 20, and this rotation speed calculation means 33 is shown in FIG. 4, for example. As described above, when the output signal from the control mode setting means 24 is the heating mode, the straight line b of the characteristic curve B is obtained.
With reference to -1, the rotation speed corresponding to the output temperature signal of the temperature setter 32 is calculated. Next, the signal output from the rotation speed calculation means 33 is input to the rotation speed reduction means 9, and when the operation mode SW 19 is not set and operated, the rotation speed calculation means 33 calculates the rotation speed without reducing the rotation speed. The rotation speed is output as it is to the rotation speed output means 34. On the other hand, when the operation mode SW19 is set and operated, the rotation speed calculation is performed as the rotation speed calculated by the rotation speed calculation means 33 increases, as indicated by the straight line b-2 of the characteristic curve of FIG. The degree of reducing the rotation speed calculated by the means 33 is increased, and the rotation speed is output to the rotation speed output means 34. The rotation speed output means 34 outputs the rotation speed signal to the inverter 2
The inverter 21 drives the electric compressor 25 at the instructed rotation speed.

Therefore, in the heating mode, when a large amount of electric power is used when overtaking a car in an electric vehicle, or when climbing uphill, or when it is desired to suppress the electric power consumed for air conditioning when the remaining battery level is low. In order to reduce the power consumption of the air conditioning, the operation mode SW 19 is set and operated, and the degree of reduction is increased as the rotation speed calculated by the rotation speed calculation means 33 by the rotation speed reduction means 9 increases. Therefore, it is possible to greatly reduce the power consumption particularly under a use condition in which the power consumption of the air conditioning is relatively high.

In the dehumidifying and heating mode, the control operation and effect are the same as the above except for the operation of the refrigeration cycle, and therefore the description thereof is omitted.

FIG. 5 is a block diagram of an embodiment of the heat pump cooling / heating / dehumidifying control device for an electric vehicle according to the present invention.

The description of the structure of the refrigeration cycle is the same as that of the embodiment of claim 1, so that the description is omitted. The configuration of the control system is substantially the same as that of the embodiment of claim 1, so that only the differences will be described.

The rotation speed reducing means 9 operates in the operation mode SW19.
When is set, the upper limit of the rotation speed calculated by the rotation speed calculation means 33 is limited.

Therefore, in the cooling mode, as shown in FIG. 5, the output temperature signal of the temperature setter 32 is input to the rotation speed calculation means 33 in the air conditioning control means 20, and this rotation speed calculation means 33 is inputted.
Is, for example, as shown in FIG.
When the output signal from is in the cooling mode, the straight line a-1 of the characteristic curve of A is referred to, and the rotation speed corresponding to the output temperature signal of the temperature setter 32 is calculated. Next, the rotation speed calculation means 3
The signal output from 3 is input to the rotation speed reducing means 9,
When the operation mode SW 19 is not set and operated, the rotation speed calculated by the rotation speed calculation means 33 is directly output to the rotation speed output means 34 without reducing the rotation speed. On the other hand, when the operation mode SW19 is set and operated,
For example, the upper limit of the straight line a-1 of the characteristic curve of FIG. 6A is limited and output to the broken line portion a-2 and the rotation speed output means 34. The rotation speed output means 34 outputs the rotation speed signal to the inverter 21.
The inverter 21 drives the electric compressor 25 at the instructed rotation speed.

Therefore, in the cooling mode, when overtaking a vehicle in an electric vehicle, or when climbing uphill, when a large amount of electric power is used, or when it is desired to suppress the electric power consumed for air conditioning when the battery level is low. In order to reduce the power consumption of the air conditioning, by setting the operation mode SW 19, the rotation speed calculated by the rotation speed calculation means 33 by the rotation speed reduction means 9 is limited to a predetermined rotation speed. It is possible to limit the power consumption to a predetermined power consumption or less under the use condition where the power consumption of the air conditioning is large.

In the heating mode, as shown in FIG. 5, the output temperature signal of the temperature setter 32 is input to the rotation speed calculation means 33 in the air conditioning control means 20, and this rotation speed calculation means 33 is shown in FIG. 6, for example. As described above, when the output signal from the control mode setting means 24 is the heating mode, the straight line b of the characteristic curve B is obtained.
With reference to -1, the rotation speed corresponding to the output temperature signal of the temperature setter 32 is calculated. Next, the signal output from the rotation speed calculation means 33 is input to the rotation speed reduction means 9, and when the operation mode SW 19 is not set and operated, the rotation speed calculation means 33 calculates the rotation speed without reducing the rotation speed. The rotation speed is output as it is to the rotation speed output means 34. On the other hand, when the operation mode SW19 is set and operated, for example, the upper limit of the straight line b-1 of the characteristic curve of B of FIG.
2. Output to the rotation speed output means 34. Rotation speed output means 3
4 outputs a signal of this rotation speed to the inverter 21, and the inverter 21 outputs the electric compressor 25 at this designated rotation speed.
Drive.

Therefore, in the heating mode, when a large amount of electric power is used when overtaking a car in an electric vehicle, or when climbing uphill, or when it is desired to suppress the electric power consumed for air conditioning when the battery level is low. In order to reduce the power consumption of the air conditioning, the operation mode SW 19 is set and operated, and the degree of reduction is increased as the rotation speed calculated by the rotation speed calculation means 33 by the rotation speed reduction means 9 increases. Therefore, it is possible to greatly reduce the power consumption particularly under a use condition in which the power consumption of the air conditioning is relatively high.

In the dehumidifying and heating mode, the control operation and effect are the same as the above except for the operation of the refrigeration cycle, and the description thereof will be omitted.

Although the embodiments of claims 1 to 3 have been described above, for example, if the invention is carried out according to the combination of claims 2 and 3 or claims 1 and 3, from the low rotation speed range of the electric compressor. It is possible to reduce the power consumption up to the range up to the high rotation speed and limit the maximum power, and it is possible to expect an even higher effect.

Although the temperature setting means 32 has been described above, the same effect can be obtained by substituting the rotation speed setting means for directly setting the rotation speed of the electric compressor 25.

[0047]

【The invention's effect】

(Claim 1) According to the first means of the present invention, as is clear from the above description, the air-conditioning operation means, and the operation mode setting means for setting the operation mode of at least the rotation speed of the electric compressor, Since the air conditioning control means is provided with a rotation speed reduction means for reducing the rotation speed calculated by the rotation speed calculation means when the operation mode setting means is set,
In order to reduce the power consumption of the air conditioner in the situation where a large amount of power is used, such as when overtaking a car in an electric vehicle, or when climbing uphill, or when it is desired to reduce the power consumed for air conditioning when the battery level is low, By setting the operation mode setting means, the number of rotations calculated by the number-of-revolutions calculation means is reduced by the number-of-revolutions reduction means, so that it is possible to reduce the power consumption of the air conditioning, and to have general expertise. Even users who do not have it can easily realize energy-saving operation of air conditioning.

(Claim 2) According to the second means of the present invention, when the operation mode setting means is set, the first means and the rotation speed reducing means in the first means are operated as the rotation speed calculating means. Since the degree of decreasing the rotation speed calculated by the rotation speed calculation means is increased as the rotation speed calculated by the rotation speed calculation means is increased, in particular, the rotation speed calculated by the rotation speed calculation means is The higher the rotation speed, the greater the degree to which the rotation speed is reduced. Therefore, it is possible to significantly reduce the power consumption in the high rotation region of the electric compressor. Further, like the first means, even a user who does not have general expertise can easily realize the energy-saving operation of the air conditioning.

(Claim 3) According to the third means of the present invention, the first means and the rotation speed reducing means in the first means are the rotation speed calculating means when the operation mode setting means is set. Since the upper limit of the rotation speed calculated in step 1 is limited, it can be limited to at least a predetermined power consumption or less. Further, like the first means, even a user who does not have general expertise can easily realize the energy-saving operation of the air conditioning.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a heat pump cooling and heating dehumidifying device for an electric vehicle according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining calculation by the same rotation speed calculation means.

FIG. 3 is a configuration diagram of a heat pump cooling / heating / dehumidifying device for an electric vehicle according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of calculation of the rotation speed calculation means.

FIG. 5 is a configuration diagram of an embodiment of a heat pump cooling and heating dehumidifying device for an electric vehicle according to a third embodiment of the present invention.

FIG. 6 is a diagram for explaining calculation by the same rotation speed calculation means.

FIG. 7 is a configuration diagram of an embodiment of a conventional heat pump cooling and heating dehumidifying device for an electric vehicle.

FIG. 8 is an explanatory diagram of calculation performed by the same rotation speed calculation means.

[Explanation of symbols]

 1 Air Volume Setting Means 2 Outside Air Heat Exchanger 3 Air Blower for Outside Air Heat Exchanger 4 Refrigerant Throttling Device 5 Inside Air Heat Exchanger 6 Inside / Outside Air Introducer 7 Blower for Inside Air Heat Exchanger 8 Register 9 Rotation speed reducing means 10 Air conditioning operation panel 14 Second vehicle interior air heat exchanger 15 First refrigerant expansion device 16 Bypass circuit 17 First three-way switching valve 18 Second three-way switching valve 19 Operating mode SW 20 Air conditioning control means 21 Inverter 22 Four-way switching valve 23 Ventilation circuit switching actuator 24 Control mode selection SW 25 Electric compressor 26 First cabin air heat exchanger 27 Second refrigerant expansion device 28 First ventilation circuit 29 Second ventilation circuit 30 Ventilation circuit switching damper 31 Refrigerant piping 32 Temperature setting means 33 Rotation speed calculation means 34 Rotation speed output means 35 Output control hand

Claims (3)

[Claims] 1. A heat pump cooling and heating dehumidifying device for an electric vehicle, comprising: an electric compressor having a built-in motor; an inverter for energizing a motor of the electric compressor to drive the electric compressor at a variable rotation speed; An air conditioning control means for instructing the number of revolutions of the electric compressor, an air conditioning operating means for performing at least a blowout temperature or a setting related to the number of revolutions of the electric compressor for the air conditioning control means, and the air conditioning control means, The air-conditioning operation means comprises at least a rotation speed calculation means for calculating a rotation speed corresponding to a setting signal related to a blowout temperature from the air-conditioning operation means or a rotation speed of the electric compressor. When the operation mode setting means is set in the air-conditioning control means and the operation mode setting means for setting the operation mode of the rotation speed, the rotation Calculating means at the calculated electric vehicle heat pump air conditioning, characterized in that the rotational speed reduction means for reducing the rotational speed provided dehumidification controller. 2. When the operation mode setting means is set in the rotation speed reducing means, the larger the rotation speed calculated by the rotation speed calculating means, the higher the rotation speed calculated by the rotation speed calculating means becomes. Claim 1 which decided to make the degree to reduce large.
A heat pump cooling and heating dehumidification control device for an electric vehicle as described above. 3. The heat pump cooling and heating for an electric vehicle according to claim 1, wherein the rotation speed reduction means limits the upper limit of the rotation speed calculated by the rotation speed calculation means when the operation mode setting means is set. Dehumidification control device.