JP6623945B2 - Air conditioning control device - Google Patents

Description

  The present invention relates to an air conditioning control device.

  2. Description of the Related Art Conventionally, a vehicle usually switches between a power-on state in which a prime mover that generates power for traveling can be energized and a power-off state in which the prime mover cannot be energized. The power-on state includes, for example, an IG-on state, and the power-off state includes, for example, an IG-off state. It is also common that such a vehicle is equipped with a vehicle air conditioner.

  Conventionally, an air-conditioning control device that controls a device to be controlled by the vehicle air-conditioning device has performed control for eliminating the inconvenience of operation by a passenger. Specifically, as described in Patent Literature 1, when the vehicle changes from the power-off state to the power-on state, the air-conditioning control device controls the blower in the same manner as immediately before the vehicle finally changes to the power-off state. The operation and non-operation of the was controlled. Here, the blower is a device for flowing the blown air into the vehicle interior.

JP 2013-60145 A

  However, according to the study of the inventor, if the blower is always returned to the state immediately before the power-off regardless of the occupant's intention, wasteful power consumption occurs. For example, it is assumed that the blower is operating immediately before the vehicle is changed from the power-on state to the power-off state. In this case, when the power is turned on next time, in the related art, the blower operates. However, at this time, when the occupant does not request air blowing into the vehicle interior, the power consumption by the operation of the blower is wasteful power consumption.

  In view of the above, it is an object of the present invention to reduce wasteful power consumption of a vehicle air conditioner mounted on a vehicle that switches between a power-on state and a power-off state.

According to a first aspect of the present invention, there is provided a vehicle which switches between a power-on state in which a prime mover for generating power for traveling can be energized and a power-off state in which the prime mover cannot be energized. An air conditioning control device for controlling a device to be controlled by a vehicle air conditioner (1) to be mounted,
Immediately before the vehicle finally changes from the power-on state to the power-off state, the blower (33) for flowing blast air into the vehicle compartment is operating, and the vehicle is in the power-off state. If actuation of the blower is stopped, based on which the vehicle is turned to the power on state from the power-off state, have a stop maintaining means (110, 120) to maintain the operation stop of the blower,
Based on the return operation by the occupant of the vehicle while the stop maintaining means is maintaining the operation stop of the blower, the operation and non-operation of the blower are performed last from the power-on state. First last mode return means (124, 104, 106, 140) for controlling the blower so as to be the same as immediately before the power-off state;
When the number of times the return operation is performed is equal to or more than a reference value, based on the fact that the vehicle is in the power-on state, the operation or non-operation of the blower is performed when the vehicle is finally switched from the power-on state. Second last mode return means (101, 104, 106, 140) for controlling the blower so as to be the same as immediately before the power-off state,
The reference value is an air conditioning control device that is 2 or more .

  As described above, even when the blower is operating immediately before the power-off state, the air-conditioning control device maintains the operation stop of the blower in the next power-on state. Therefore, when the occupant does not request air blowing, wasteful power consumption of the vehicle air conditioner can be reduced.

  Note that reference numerals in parentheses in the above and in the claims indicate the correspondence between the terms described in the claims and the specific examples and the like described in the embodiments described below. .

1 is an overall configuration diagram of a vehicle air conditioning system including a refrigeration cycle device according to a first embodiment. It is a block diagram which shows an air-conditioning control apparatus and its peripheral device. It is a flowchart of the process which an air conditioning control device performs. It is a block diagram showing an air-conditioning control device and a peripheral device in a 2nd embodiment. It is a flowchart of the process which an air conditioning control device performs. It is a block diagram showing an air-conditioning control device and a peripheral device in a 3rd embodiment. It is a flowchart of the process which an air conditioning control device performs. It is a block diagram showing an air-conditioning control device and a peripheral device in a 4th embodiment. It is a flowchart of the process which an air conditioning control device performs. It is a flow chart of processing which an air-conditioning control device performs in a 5th embodiment.

(1st Embodiment)
Hereinafter, embodiments will be described. The vehicle air conditioner system according to the present embodiment is mounted on a vehicle, and has a vehicle air conditioner 1 and an air conditioning controller 50. This vehicle is an electric vehicle. The electric vehicle has a traveling electric motor as a prime mover for generating traveling power. Further, the electric vehicle does not have a heat engine as a prime mover for generating motive power for traveling. The traveling electric motor and the vehicle air conditioner 1 receive power supply from the same battery of the vehicle.

  The vehicle air conditioner 1 is configured to be switchable between a cooling mode for cooling a vehicle room, which is a space to be air-conditioned, and a heating mode for heating the vehicle room. As shown in FIG. 1, the vehicle air conditioner 1 includes a refrigeration cycle device 10 and an indoor air conditioning unit 30 as main components.

  The refrigeration cycle apparatus 10 includes a compressor 11, an indoor condenser 12, a first expansion valve 13a, a high pressure side on-off valve 13b, an outdoor heat exchanger 14, a three-way valve 15, a second expansion valve 18, an indoor evaporator 19, and an accumulator. And a refrigeration cycle of a vapor compression type provided with a refrigeration cycle 22. The refrigeration cycle device 10 is a heat pump cycle.

  In the refrigeration cycle apparatus 10 of the present embodiment, an HFC-based refrigerant (for example, R134a) is adopted as the refrigerant, and the vapor pressure subcritical refrigeration cycle in which the refrigerant pressure on the high pressure side in the cycle does not exceed the critical pressure of the refrigerant. Is composed. Of course, an HFO-based refrigerant (for example, R1234yf) or the like may be employed as the refrigerant.

  In the refrigeration cycle device 10, the compressor 11 sucks, compresses, and discharges the refrigerant. The compressor 11 is an electric compressor that drives a compression mechanism (not shown) by an electric motor (not shown). Various compression mechanisms such as a scroll type compression mechanism and a vane type compression mechanism can be adopted as the compression mechanism. The operation of the compressor 11 is controlled by a control signal of the air conditioning control device 50.

  The indoor condenser 12 is connected to the refrigerant discharge port side of the compressor 11. The indoor condenser 12 is a radiator that radiates the high-pressure refrigerant discharged from the compressor 11. The indoor condenser 12 of the present embodiment is arranged in an air-conditioning case 31 of an indoor air-conditioning unit 30. The indoor condenser 12 is a heat exchanger for heating the blown air that has passed through the indoor evaporator 19 by exchanging heat between the high-pressure refrigerant discharged from the compressor 11 and the blown air.

  The refrigerant outlet side of the indoor condenser 12 is connected to a high-pressure side branch portion 23 that branches the flow of the refrigerant flowing out of the indoor condenser 12. The high-pressure side branch portion 23 is formed of a three-way joint in which one of the three inlets and outlets is a refrigerant inlet, and the other two are refrigerant outlets.

  The first expansion valve 13a is connected to one refrigerant outlet of the high pressure side branch portion 23, and the high pressure side on-off valve 13b is connected to the other refrigerant outlet.

  The first expansion valve 13a is a fixed throttle that reduces the pressure of the high-pressure refrigerant flowing out of the indoor condenser 12. The refrigerant flowing out of the first expansion valve 13a flows into the outdoor heat exchanger 14. The high pressure side on-off valve 13b is a passage on-off valve that opens and closes a passage that bypasses the first expansion valve 13a. The operation of the high pressure side on-off valve 13b is controlled by a control signal output from the air conditioning control device 50.

  The pressure loss generated when the refrigerant passes through the high pressure side on-off valve 13b is extremely smaller than the pressure loss generated when the refrigerant passes through the first expansion valve 13a. Therefore, when the high-pressure side on-off valve 13b is open, the refrigerant flowing out of the indoor condenser 12 flows into the outdoor heat exchanger 14 mainly through the high-pressure side on-off valve 13b, and the high-pressure side on-off valve 13b is closed. If it is, it flows into the outdoor heat exchanger 14 only through the first expansion valve 13a.

  As a result, the pressure reducing unit constituted by the first expansion valve 13a and the high-pressure side opening / closing valve 13b is changed to a throttle state in which the pressure reducing action is exerted and a fully open state in which the pressure reducing action is not exerted by opening and closing the high-pressure side opening / closing valve 13b. It is possible to do.

  The outdoor heat exchanger 14 is disposed in the interior space of the hood of the vehicle and exchanges heat between the refrigerant flowing out of the first expansion valve 13a or the high pressure side on-off valve 13b and the outside air blown from the outdoor fan 14a. It is. The outside air is air outside the vehicle compartment.

  The outdoor heat exchanger 14 functions as an evaporator that evaporates the low-pressure refrigerant that has passed through the first expansion valve 13a in the heating mode. In the cooling mode, the outdoor heat exchanger 14 functions as a radiator that radiates the high-pressure refrigerant that has passed through the high-pressure side on-off valve 13b.

  The outdoor fan 14a is a blower that causes outside air to flow into the outdoor heat exchanger 14. The outdoor fan 14a of the present embodiment is configured by an electric fan controlled by a control signal output from the air conditioning control device 50.

  A three-way valve 15 that branches the flow of the refrigerant flowing out of the outdoor heat exchanger 14 is connected to a refrigerant outlet side of the outdoor heat exchanger 14. The refrigerant inlet side of the three-way valve 15 is connected to the refrigerant outlet side of the outdoor heat exchanger 14. The two refrigerant outlets of the three-way valve 15 are connected to a low-pressure refrigerant passage 16 and a low-pressure bypass passage 17, respectively.

  The three-way valve 15 switches between a cooling state and a heating state. In the cooling state, the refrigerant flowing out of the outdoor heat exchanger 14 is guided to only the low-pressure refrigerant passage 16 of the low-pressure refrigerant passage 16 and the low-pressure bypass passage 17 through the three-way valve 15. In the heating state, the refrigerant flowing out of the outdoor heat exchanger 14 passes through the three-way valve 15 and is guided to only the low-pressure bypass passage 17 of the low-pressure refrigerant passage 16 and the low-pressure bypass passage 17. Switching between the heating state and the cooling state is controlled by a control signal output from the air conditioning control device 50.

  The low-pressure refrigerant passage 16 is a refrigerant passage that guides refrigerant to an accumulator 22 described below via the second expansion valve 18 and the indoor evaporator 19. The second expansion valve 18 is a fixed throttle that reduces the pressure of the refrigerant flowing out of the outdoor heat exchanger 14 that functions as a radiator.

  The indoor evaporator 19 is arranged in the air-conditioning case 31 of the indoor air-conditioning unit 30 on the upstream side of the air flow of the indoor condenser 12. The indoor evaporator 19 is an evaporator that evaporates the low-pressure refrigerant that has passed through the second expansion valve 18. The indoor evaporator 19 cools the blown air by evaporating the low-pressure refrigerant by exchanging heat between the low-pressure refrigerant that has passed through the second expansion valve 18 and the blown air before passing through the indoor condenser 12. Heat exchanger.

  The low-pressure bypass passage 17 is a refrigerant passage that bypasses the second expansion valve 18 and the indoor evaporator 19 and guides the refrigerant to the accumulator 22. In the present embodiment, the three-way valve 15 functions as a passage switching unit that switches the refrigerant passage of the refrigerant flowing out of the outdoor heat exchanger 14 to one of the low-pressure refrigerant passage 16 and the low-pressure bypass passage 17.

  A low-pressure merging section 21 is connected to the low-pressure refrigerant passage 16 downstream of the indoor evaporator 19 and to the low-pressure bypass passage 17 downstream of the three-way valve 15. At the low-pressure merging section 21, the low-pressure refrigerant passage 16 and the low-pressure bypass passage 17 are joined. The low-pressure side joining portion 21 is formed of a three-way joint. One of the three ports of the three-way joint is a refrigerant outlet, and the other two are refrigerant inlets. One of the two refrigerant inlets is connected to the low-pressure refrigerant passage 16, and the other is connected to the low-pressure bypass passage 17.

  An accumulator 22 is connected to the refrigerant outlet side of the low-pressure merging section 21. The accumulator 22 separates the gas and liquid of the refrigerant that has flowed into the accumulator 22, and causes the separated gas-phase refrigerant and the lubricating oil contained in the refrigerant to flow out to the refrigerant suction port side of the compressor 11. The accumulator 22 stores the liquid-phase refrigerant separated therein as surplus refrigerant in the cycle.

  Next, the indoor air conditioning unit 30 will be described. The indoor air conditioning unit 30 is arranged inside the instrument panel (i.e., instrument panel) at the forefront of the vehicle compartment. The indoor air conditioning unit 30 has an air conditioning case 31. The air-conditioning case 31 forms an outer shell of the indoor air-conditioning unit 30 and also forms an air passage for air blown into the vehicle interior.

  At the most upstream side of the airflow of the air conditioning case 31, an inside / outside air switching device 32 for introducing one or both of the air in the vehicle compartment (that is, the inside air) and the outside air as blast air is arranged. The inside / outside air switching device 32 adjusts the opening areas of the inside air introduction port and the outside air introduction port with the inside / outside air switching door. Thus, the inside / outside air switching device 32 is a device that changes the ratio of the amount of inside air in the blown air introduced into the air conditioning case 31 to the amount of outside air (that is, the inside air ratio).

  In the case of the inside air mode, the inside / outside air switching device 32 closes the outside air inlet and fully opens the inside air inlet. Therefore, in the inside air mode, the air volume ratio of the inside air volume to the outside air volume is 1 to 0 (that is, the upper limit value). In the case of the outside air mode, the inside / outside air switching device 32 closes the inside air inlet and fully opens the outside air inlet. Therefore, in the outside air mode, the air volume ratio of the inside air volume to the outside air volume is 0 to 1 (that is, the lower limit).

  On the downstream side of the air flow of the inside / outside air switching device 32, a blower 33 for flowing the blast air introduced from the inside / outside air switching device 32 into the vehicle compartment is arranged. The blower 33 is an electric blower that drives a centrifugal fan 33a such as a sirocco fan with an electric motor 33b. The blowing capacity (for example, the number of revolutions) of the blower 33 is controlled by a control voltage output from the air conditioning controller 50.

  On the downstream side of the air flow of the blower 33, the indoor evaporator 19 and the indoor condenser 12 are disposed in the order of the indoor evaporator 19 and the indoor condenser 12 with respect to the flow of the blown air. In other words, the indoor evaporator 19 is disposed upstream of the indoor condenser 12 in the air flow.

  In the air-conditioning case 31, a cool air bypass passage 34 for flowing air after passing through the indoor evaporator 19 is provided. The blown air passing through the cool air bypass passage 34 flows around the indoor condenser 12. In the air conditioning case 31, an A / M door 35 is disposed downstream of the indoor evaporator 19 in the air flow and upstream of the indoor condenser 12 in the air flow.

  The A / M door 35 adjusts the ratio of the amount of air flowing through the indoor condenser 12 to the amount of air flowing through the cool air bypass passage 34 (that is, the ratio of warm air) of the air blown after passing through the indoor evaporator 19. . By adjusting the air volume ratio, the A / M door 35 adjusts the temperature of the air blown into the vehicle interior. The operation of the A / M door 35 is controlled by a control signal output from the air conditioning controller 50.

  In addition, on the downstream side of the air flow of the indoor condenser 12 and the cool air bypass passage 34, a joining space (not shown) is formed in which the hot air that has passed through the indoor condenser 12 and the cool air that has passed through the cool air bypass passage 34 are joined. I have.

  A plurality of opening holes are formed at the most downstream portion of the airflow of the air-conditioning case 31 to blow out the blast air merged in the merged space into the vehicle interior. Although not shown, the air-conditioning case 31 has, as opening holes, a FACE opening hole that blows out conditioned air toward the upper body of the occupant in the passenger compartment and a FOOT opening hole that blows out conditioned air toward the feet of the occupant.

  A well-known FACE door, FOOT door, or the like is disposed on the upstream side of the air flow of each opening hole as a blow mode door for adjusting the opening area of each opening hole. These blow-out mode doors are driven by an actuator whose operation is controlled by a control signal output from the air conditioning controller 50 via a link mechanism (not shown) or the like.

  Further, the downstream side of the air flow of each opening hole is connected to a FACE outlet, a FOOT outlet, and the like provided in the vehicle cabin via a duct forming an air passage.

  Next, an electronic control unit of the refrigeration cycle device 10 of the present embodiment will be described with reference to FIG. The air-conditioning control device 50 includes a microcomputer including memories such as a CPU, a ROM, a RAM, and a non-volatile memory (for example, a flash memory) and peripheral circuits thereof. The air conditioning control device 50 performs various calculations and processes based on a control program stored in the memory. The air-conditioning control device 50 controls the operation of various air-conditioning control target devices connected to the output side based on various calculations and processes. These control target devices are a part of the vehicle air conditioner 1.

  A sensor group for air conditioning control is connected to the input side of the air conditioning control device 50. Specifically, the air-conditioning control device 50 includes, as sensors for detecting the state of the environment inside and outside the vehicle, an inside air sensor for detecting the inside air temperature, an outside air sensor for detecting the outside air temperature, and a solar irradiation for detecting the amount of solar radiation into the vehicle interior. Sensors and the like are connected. The internal temperature is the air inside the vehicle. The outside air temperature is the air outside the vehicle compartment.

  Further, sensors 51 to 53 (not shown) for detecting the operation state of the refrigeration cycle device 10 are connected to the air conditioning control device 50. An operation panel 60 on which various air conditioning operation switches are arranged is connected to the air conditioning control device 50. A signal indicating an operation state of various air conditioning operation switches on the operation panel 60 is input to the air conditioning control device 50. The operation panel 60 is provided with an automatic setting switch 60a, a manual setting section 60b, and a temperature setting switch 60c that can be operated by a vehicle occupant.

  The automatic setting switch 60a is a switch for turning on and off automatic air conditioning for automatically controlling various control target devices. The manual setting unit 60b is a group of switches for manually setting individual operation contents of various control target devices. The temperature setting switch 60c is a switch for setting the set temperature Tset, which is a set value of the target temperature in the vehicle compartment, both when the automatic air conditioning is turned on and when the auto air conditioning is turned off.

  The air conditioning control device 50 of the present embodiment controls the operation of various control target devices connected to the output side. The control target devices are the compressor 11, the high pressure side on-off valve 13b, the outdoor fan 14a, the three-way valve 15, the second expansion valve 18, the inside / outside air switching device 32, the electric motor 33b, and the A / M door 35.

  Next, the operation of the refrigeration cycle device 10 and the vehicle air conditioner 1 in the above configuration will be described. The vehicle air conditioner 1 of the present embodiment is stopped without being energized when the vehicle is in the power-off state, and is energized and operates when the vehicle is in the power-on state.

  The power-on state indicates a state in which a power switch (not shown) of the vehicle is operated and the electric motor for traveling can be energized. The power-off state indicates a state in which the power switch is operated and the electric motor for traveling cannot be energized. The vehicle switches between a power-on state and a power-off state by operating a power switch.

  The processing executed by the air conditioning control device 50 will be described with reference to the flowchart shown in FIG. The air-conditioning control device 50 is energized and starts operating when the vehicle changes from the power-off state to the power-on state, and starts the processing in FIG.

  First, the air-conditioning control process executed by the air-conditioning control device 50 in step 140 will be described. In the following, the air conditioning control process when the auto setting switch 60a is operated to set the auto air conditioning to on will be described.

  In the air-conditioning control process, the air-conditioning control device 50 first obtains the operation state of the occupant on the operation panel 60 and reads each sensor signal of the sensor group for air-conditioning control.

Subsequently, the air-conditioning control device 50 calculates a target outlet temperature TAO, which is a temperature of the air blown into the vehicle interior, based on the read various states and various signals. Specifically, the target blowing temperature TAO is calculated using the following equation.
TAO = Kset × Tset−Kr × Tr−Kam × Tam−Ks × As + C
Here, Tr is the inside air temperature detected by the inside air sensor. Tam is the outside air temperature detected by the outside air sensor. As indicates the amount of solar radiation detected by the solar radiation sensor. Kset, Kr, Kam, and Ks are control gains having positive values, and C is a correction constant.

  Subsequently, the air-conditioning control device 50 determines the blower level of the blower 33 based on the calculated target outlet temperature TAO. The blower level is an index indicating the blowing capacity of the blower 33. As the blower level increases, the rotation speed of the centrifugal fan 33a increases. Regardless of the target outlet temperature TAO, the blower level is larger than zero. It should be noted that the blower level being greater than zero means that the blower 33 is blowing (ie, not stopping). A known relationship may be used as the relationship between the target outlet temperature TAO and the blower level.

  Subsequently, the air-conditioning control device 50 determines the suction port mode indicating the switching state of the inside / outside air switching device 32. The inlet mode is determined by a well-known method. For example, the suction port mode may always be set to the inside air mode.

  Subsequently, the air-conditioning control device 50 determines a blowing mode based on the target blowing temperature TAO. The blowing mode includes a FACE mode, a FOOT mode, and the like. The FACE mode is an outlet mode in which the FACE outlet is opened and the FOOT outlet is closed. The FOOT mode is an outlet mode in which the FOOT outlet is opened and the FACE outlet is closed. A known relationship may be used as the relationship between the target outlet temperature TAO and the outlet mode.

  Subsequently, the air-conditioning control device 50 determines the operation mode of the vehicle air-conditioning device 1 based on the outside air temperature and the inside air temperature read immediately before, and the target outlet temperature TAO. The operation modes include a heating mode, a cooling mode, and a blowing mode. For example, in the case of the inside air mode, the operation mode is determined to be any one of the heating mode, the cooling mode, and the ventilation mode based on the inside air temperature and the target outlet temperature TAO. In the case of the outside air mode, the operation mode is determined to be any one of the heating mode, the cooling mode, and the air blowing mode based on the outside air temperature and the target outlet temperature TAO. The relationship among the target outlet temperature TAO, the outside air temperature, the inside air temperature, and the operation mode may be a known one.

  Subsequently, the air-conditioning control device 50 determines the operating state of the high-pressure side opening / closing valve 13b and the three-way valve 15 based on the operation mode determined immediately before. Specifically, when the cooling mode is selected as the operation mode, the state of the high-pressure side on-off valve 13b is determined to be fully open, and the state of the three-way valve 15 is determined to be the cooling state. When the heating mode is selected as the operation mode, the state of the high-pressure side on-off valve 13b is determined to be fully closed, and the state of the three-way valve 15 is determined to be the heating state. When the air blowing mode is selected, the operation states of the high pressure side on-off valve 13b and the three-way valve 15 are determined as they are.

  Subsequently, the air-conditioning control device 50 determines the current rotation speed Nc of the compressor 11 based on the read various signals, the target blowing temperature TAO, the operation mode, the rotation speed Nc of the compressor 11 determined in the previous step 140, and the like. decide. The relationship among the various signals, the target outlet temperature TAO, the operation mode, the previous rotation speed Nc of the compressor 11, and the current rotation speed Nc of the compressor may be a known one. When the air blowing mode is selected, the rotation speed of the compressor 11 is determined to be zero, and otherwise, the rotation speed of the compressor 11 is determined to be a value larger than zero.

  Subsequently, the air-conditioning control device 50 determines the opening of the A / M door 35 based on the operation mode and the like. The relationship between the operation mode and the A / M door 35 may be a known one.

  Subsequently, the air-conditioning control device 50 outputs control signals and the like according to the various modes and various amounts determined as described above to various control target devices. As a result, in the vehicle air conditioner 1, the various states and various amounts determined as described above correspond to the compressor 11, the outdoor fan 14a, the high-pressure side opening / closing valve 13b, the three-way valve 15, the inside / outside air switching device 32, the blower 33, This is realized in the A / M door 35. The above is the contents of the air conditioning control process in step 140 when the automatic air conditioning is set to ON.

  By such air conditioning control, the refrigeration cycle apparatus 10 operates as follows according to the operation mode selected in step 140.

(A) Cooling Mode In the cooling mode, the air-conditioning control device 50 operates the compressor 11 with the high-pressure side on-off valve 13b fully opened and the three-way valve 15 in the cooling state. For this reason, in the cooling mode, the refrigerant discharged from the compressor 11 is supplied to the indoor condenser 12, the high-pressure side on-off valve 13b, the outdoor heat exchanger 14, the three-way valve 15, the low-pressure refrigerant, as indicated by the white arrow in FIG. It flows in the order of the passage 16, the indoor evaporator 19, and the accumulator 22, and is sucked into the compressor 11 again.

  Specifically, in the cooling mode, the refrigerant discharged from the compressor 11 flows into the indoor condenser 12. At this time, since the A / M door 35 closes the air passage of the indoor condenser 12, the refrigerant flowing into the indoor condenser 12 flows out of the indoor condenser 12 with almost no heat radiation to the blown air.

  The refrigerant flowing out of the indoor condenser 12 flows into the outdoor heat exchanger 14 with almost no pressure reduction. The refrigerant flowing into the outdoor heat exchanger 14 exchanges heat with the outside air, radiates heat, and is cooled.

  The refrigerant flowing out of the outdoor heat exchanger 14 flows into the second expansion valve 18 through the low-pressure refrigerant passage 16 and is reduced in pressure until it becomes a low-pressure refrigerant. The low-pressure refrigerant flowing out of the second expansion valve 18 flows into the indoor evaporator 19 and absorbs heat from the air blown from the blower 33 to evaporate. Thereby, the blown air is cooled and dehumidified.

  The refrigerant flowing out of the indoor evaporator 19 flows into the accumulator 22 and is separated into gas and liquid. Then, the gas-phase refrigerant separated by the accumulator 22 is sucked into the compressor 11 and compressed again.

  As described above, in the cooling mode, the refrigerant radiates heat in the outdoor heat exchanger 14 and evaporates in the indoor evaporator 19. As a result, the air blown into the vehicle compartment is cooled. Thereby, cooling of the vehicle interior is realized.

(B) Heating Mode In the heating mode, the air-conditioning control device 50 operates the compressor 11 with the high-pressure side on-off valve 13b in the fully closed state and the three-way valve 15 in the heated state. Therefore, in the heating mode, the refrigerant discharged from the compressor 11 is supplied to the indoor condenser 12, the first expansion valve 13a, the outdoor heat exchanger 14, the three-way valve 15, the low-pressure bypass, as indicated by the hatched arrow in FIG. The air flows in the order of the passage 17 and the accumulator 22 and is sucked into the compressor 11 again.

  Specifically, in the heating mode, the high-pressure refrigerant discharged from the compressor 11 flows into the indoor condenser 12. At this time, the A / M door 35 fully opens the air passage of the indoor condenser 12. Therefore, the refrigerant flowing into the indoor condenser 12 exchanges heat with the air blown through the indoor evaporator 19 and radiates heat. Thereby, the blown air is heated so as to approach the target blowing temperature TAO.

  The refrigerant flowing out of the indoor condenser 12 flows into the first expansion valve 13a and is reduced in pressure until it becomes a low-pressure refrigerant. The low-pressure refrigerant flowing out of the first expansion valve 13a flows into the outdoor heat exchanger 14. The refrigerant flowing into the outdoor heat exchanger 14 exchanges heat with the outside air, absorbs heat, and evaporates.

  The refrigerant flowing out of the outdoor heat exchanger 14 flows into the accumulator 22 through the low-pressure bypass passage 17 and is separated into gas and liquid. Then, the gas-phase refrigerant separated by the accumulator 22 is sucked into the compressor 11 and compressed again.

  As described above, in the heating mode, the refrigerant radiates heat in the indoor condenser 12 and evaporates in the outdoor heat exchanger 14. Thereby, the blast air that has passed through the indoor evaporator 19 is heated by the indoor condenser 12. Thereby, heating of the vehicle interior is realized.

  In the air-conditioning control process in step 140 when the manual setting unit 60b is operated to turn off the automatic air-conditioning, the air-conditioning control device 50 sets the blower level, the suction port mode, and the blowing mode to the manual setting unit 60b. Is determined by the value set in. However, even when the automatic air conditioning is turned off, in the air conditioning control process in step 140, the air conditioning control device 50 determines that the target blowing temperature TAO, the operation mode, the rotation speed Nc of the compressor 11, the opening of the A / M door 35. Are determined in the same manner as when the automatic air conditioning is turned on. However, when the A / C-off is set by operating the manual setting unit 60b, the air-conditioning control device 50 determines the rotation speed Nc of the compressor 11 to be zero, regardless of the above operation, and sets the operation mode. Is set to the blowing mode.

  Next, the processing of steps 150 and 160 will be described. The air-conditioning control device 50 stores the status in step 150 following the air-conditioning control process in step 140. Specifically, the various values determined in step 140 are recorded in the above-mentioned nonvolatile storage medium. The values recorded in the non-volatile storage medium are set temperature Tset, blower level, suction port mode, blowout mode, operation mode, rotation speed Nc of compressor 11, opening of A / M door 35, and ON / OFF of automatic air conditioning. And so on.

  In step 160 following step 150, the air-conditioning control device 50 determines whether or not an occupant has performed a system off operation. Specifically, the air-conditioning control device 50 determines whether or not the automatic setting switch 60a has been set to off, and returns to step 140 if it has not been set to off. As long as the auto setting switch 60a is not turned off, the processing of steps 140, 150, and 160 is repeatedly performed (for example, periodically every 250 milliseconds). If the air-conditioning control device 50 determines in step 160 that the automatic setting switch has been set to off, the process returns to step 110. The processing content of step 110 will be described later.

  Here, it is assumed that the occupant operates the power switch when the air-conditioning control device 50 repeatedly executes steps 140, 150, and 160, and then the vehicle is turned off. In this case, the air conditioning control device 50 is not energized during the process, and as a result, the air conditioning process is interrupted. At this time, the blower 33, the compressor 11, and the outdoor fan 14a are also not energized and stop operating. A state in which neither the blower 33 nor the compressor 11 operates is referred to as an air conditioning system off state. In addition, a state in which the blower 33 is operating is referred to as an air conditioning system on state. Thereafter, while the power-off state continues, the blower 33, the compressor 11, and the outdoor fan 14a are not energized and do not operate.

  After the power-off state has continued for a predetermined period (for example, 10 minutes or more, 1 hour or more, 1 day or more), it is assumed that the power-on state is caused by the occupant operating the power switch. Then, the air-conditioning control device 50 is re-energized and started up, and starts the processing in FIG.

  Then, in the process of FIG. 3, first, at step 110, the air-conditioning system 1 is maintained in the air-conditioning system off state immediately before the last power-off, regardless of whether the air conditioning system 1 is in the air conditioning system on state or the air conditioning system off state. Specifically, the air-conditioning control device 50 does not energize the electric motor 33b of the blower 33. Therefore, the blower 33 does not operate. Further, the air-conditioning control device 50 does not energize the electric motor of the compressor 11. Therefore, the compressor 11 does not operate. Further, the air conditioning controller 50 does not energize the electric motor of the outdoor fan 14a. Therefore, the outdoor fan 14a does not operate.

  Subsequently, in step 120, it is determined whether or not there is a predetermined air conditioning start operation. The air-conditioning start operation refers to an operation of the automatic setting switch 60a or the manual setting unit 60b by the occupant. If there is no air conditioning start operation, step 120 is repeated again.

  Therefore, after the vehicle enters the power-on state, while there is no air conditioning start operation, regardless of whether the vehicle air conditioner 1 is in the air conditioning system on state or the air conditioning system off state immediately before the last power off, The air conditioning system off state is continued.

  If the air conditioning control device 50 determines in step 120 that an air conditioning start operation has been performed, the process proceeds to step 130. In step 130, the values of some of the states recorded in step 150 immediately before the last power-off state are discarded.

  Specifically, the set temperature Tset, the blower level, the suction mode, the blow mode, the operation mode, the rotation speed Nc of the compressor 11, the opening degree of the A / M door 35, Among the ON / OFF states of the automatic air conditioning, the values are deleted for the set temperature Tset, the blower level, the rotation speed Nc of the compressor 11, and the ON / OFF state of the automatic air conditioning. The reason why these amounts are discarded is that when returning from the air-conditioning system off state to the air-conditioning system on state, past settings related to air conditioning are not inherited.

  The reason why the suction mode, the blowing mode, the operation mode, and the opening of the A / M door 35 are not discarded is as follows. The states of the inside / outside air switching door, the blow-out mode door, the high-pressure side on-off valve 13b, and the three-way valve 15 immediately before the power-off state is maintained even if the power-off state is followed by the power-on state. I have. Therefore, when the air-conditioning control device 50 instructs the inside / outside air switching door, the blow-out mode door, the high-pressure side opening / closing valve 13b, and the three-way valve 15 in the air-conditioning control to indicate a relative change amount with respect to the current state, Is required.

  The air conditioning control device 50 proceeds to step 140 after step 130. The processing after step 140 is as described above. In the air conditioning control process of step 140, when it is necessary to use the amount discarded in step 130, the air conditioning control device 50 uses a predetermined default value.

  As described above, the air-conditioning control device 50 determines whether or not the blower 33 is operating immediately before the vehicle finally enters the power-off state, even if the blower 33 is not operating. The operation of the blower 33 is kept stopped. Similarly, even if the compressor 11 is operating or not operating immediately before the vehicle finally enters the power-off state, the air-conditioning control device 50 performs the operation immediately after the vehicle returns to the power-on state, The operation of the compressor 11 is stopped.

  With such a configuration, when the occupant does not want air conditioning when the vehicle returns to the power-on state, it is possible to reduce unnecessary increase in power consumption. This effect is particularly remarkable in electric vehicles.

  As described above, the air-conditioning control device 50 keeps the operation of the blower 33 and the compressor 11 stopped based on the fact that the vehicle has changed from the power-off state to the power-on state. In this control, the blower 33 and the compressor 11 are operating immediately before the vehicle finally enters the power-off state from the power-on state, and the blower 33 and the compressor 11 Is realized when the operation of is stopped. This control is realized even when the blower 33 and the compressor 11 are not operating immediately before the vehicle finally changes from the power-on state to the power-off state.

  As described above, even when the blower 33 and the compressor 11 are operating immediately before the power-off state, the air-conditioning control device 50 maintains the operation stop of the blower 33 and the compressor 11 in the next power-on state. Therefore, when the occupant does not require ventilation and air conditioning by the indoor condenser 12 and the indoor evaporator 19, wasteful power consumption of the vehicle air conditioner 1 can be reduced.

  In addition, the air conditioning control device 50 maintains the operation stop of the blower 33 and the compressor 11 until the air conditioning start operation is performed after the vehicle is powered on. Therefore, power consumption can be reduced by more reliably reflecting the intention of the occupant.

  Further, even if the blower 33 and the compressor 11 are not operating immediately before the power-off state, the air-conditioning control device 50 maintains the operation stop of the blower 33 and the compressor 11 in the next power-on state. Therefore, power consumption can be further reduced, and the cruising distance of the vehicle increases.

(2nd Embodiment)
Next, a second embodiment will be described. The vehicle air conditioning system according to the present embodiment differs from the vehicle air conditioning system according to the first embodiment in two points. Specifically, as shown in FIG. 4, the operation panel 60 of the present embodiment is different from the operation panel 60 of the first embodiment in that a last mode use switch 60d is added. Further, the air conditioning control device 50 of the present embodiment executes the processing shown in FIG. 5 instead of the processing shown in FIG. 3 in the first embodiment.

  Hereinafter, parts of the vehicle air-conditioning system of the present embodiment that are different from the first embodiment will be mainly described. Note that elements denoted by the same reference numerals in FIGS. 2 and 4 are the same elements. Steps denoted by the same reference numerals in FIGS. 3 and 5 realize the same processing.

  The last mode use changeover switch 60d is a switch that can be operated by an occupant, and switches the state between on and off. Further, the on / off state of the last mode use changeover switch 60d does not change unless the occupant performs the changeover operation. The on / off state of the last mode use switch 60d is maintained regardless of whether the vehicle changes from the power on state to the power off state or from the power off state to the power on state.

  For example, the last mode use changeover switch 60d may be a mechanical switch. In this case, the last mode use changeover switch 60d includes an operated member that is directly operated and moved by the occupant, and a detection unit that detects the position of the operated member.

  The moving member moves between the on position and the off position by receiving an operation from the occupant. Then, the moving member keeps the current position unless it is operated by the occupant. When the moving member is at the ON position, the detection unit outputs an ON signal to the air conditioning control device 50. When the moving member is at the off position, the detection unit outputs an off signal to the air conditioning control device 50.

  The air conditioning control device 50 determines that the last mode use switch 60d is in the ON state when the ON signal is output from the detection unit of the last mode use switch 60d. In addition, when an off signal is output from the detection unit of the last mode use changeover switch 60d, the air conditioning control device 50 determines that the last mode use changeover switch 60d is in the off state.

  Next, the processing of FIG. 5 will be described. The air-conditioning control device 50 executes step 115 after maintaining the air-conditioning system off state in step 110 as in the first embodiment. In step 115, the value "air conditioning system off" is recorded in the variable "last mode" in the above-mentioned nonvolatile storage medium. After step 115, the process proceeds to step 120.

  The air-conditioning control device 50 performs the air-conditioning control process and the state storage in steps 140 and 150 in the same manner as in the first embodiment, and then executes step 155. In step 155, the value "air conditioning system on" is recorded in the variable "last mode" in the above-mentioned nonvolatile storage medium. After step 155, the process proceeds to step 160.

  As described above, the current on / off state of the vehicle air conditioning system is reflected in the variable called the last mode in the above-mentioned nonvolatile storage medium.

  Here, it is assumed that the vehicle changes from the power-on state to the power-off state. At this time, if the air conditioning control device 50 repeats the negative determination in step 120 after step 115, the value of the last mode in the nonvolatile storage medium at the time of changing to the power-off state is “air conditioning”. The system is off. If the air conditioning control device 50 repeats the loop of steps 140, 150, 155, and 160 at the time of this change, the value of the last mode in the non-volatile storage medium at the time of changing to the power-off state is , “Air conditioning system on”.

  After the power-off state has continued for a predetermined period (for example, 10 minutes or more, 1 hour or more, 1 day or more), it is assumed that the power-on state is caused by the occupant operating the power switch. Then, the air-conditioning control device 50 is re-energized and started, and starts the processing in FIG.

  In the process of FIG. 5, first, at step 102, it is determined whether or not the state of the last mode use changeover switch 60d is on. If the state of the last mode use changeover switch 60d is on, the process proceeds to step 104, and if it is off, the process proceeds to step 110.

  That the state of the last mode use changeover switch 60d is ON corresponds to that the operation content by the occupant of the vehicle satisfies a predetermined standard. When the state of the last mode use changeover switch 60d is off, it means that the operation content by the occupant of the vehicle does not satisfy a predetermined standard.

  In step 104, the air-conditioning control device 50 reads the last mode value recorded in the above-described nonvolatile storage medium, and determines whether or not the value is “air-conditioning system on”. If "air conditioning system on", the process proceeds to step 106. If it is not “air conditioning system on”, that is, if “air conditioning system is off”, the process proceeds to step 110 to maintain the air conditioning system off state.

  As described above, if the blower 33 is operating at the time of the last (ie, previous) change to the power-off state, the value of the last mode read in step 104 is “air-conditioning system on”. If the blower 33 is not operating at the time of the last (that is, previous) change to the power-off state, the value of the last mode read in step 104 is “air conditioning system off”.

  In step 106, the state is restored. Specifically, the set temperature Tset, the blower level, the suction mode, the blow mode, the operation mode, the rotation speed Nc of the compressor 11, the opening degree of the A / M door 35, Reads ON / OFF of automatic air conditioning. After step 106, the process proceeds to step 140.

  In the air conditioning control process of step 140 following step 106, the amount read in step 106 is used. For example, in step 140, the air-conditioning control device 50 determines whether the automatic air-conditioning is on or off based on the amount read in step 106.

  Further, for example, when calculating the target outlet temperature TAO in step 140, the air-conditioning control device 50 substitutes the set temperature Tset read in step 106 into the above equation. Further, for example, in the air conditioning control process in step 140, if the automatic air conditioning is turned off, the air conditioner controller 50 sets the blower level read in step 106 as the current blower level.

  Further, for example, in the air conditioning control process in step 140, the air conditioning control device 50 calculates the rotation speed Nc of the compressor 11 this time by using the rotation speed Nc of the compressor 11 read in step 106 as the previous compressor. 11 is used as the rotation speed Nc.

  Therefore, by the air conditioning control process in step 140, the operating state of the vehicle air conditioner 1 becomes the same as immediately before the vehicle finally enters the power-off state. In this operation state, the operation and non-operation of the blower 33, the operation and non-operation of the compressor 11, the set temperature Tset, the blower level, the suction mode, the blow mode, the operation mode, the rotation speed Nc of the compressor 11, A / The opening degree of the M door 35, ON / OFF of automatic air conditioning, and the like are included.

  As described above, in the present embodiment, when the state of the last mode use changeover switch 60d is off, the air conditioning control device 50 performs the same operation as in the first embodiment immediately after the vehicle returns from the power off state to the power on state. Then, the operation of the blower 33 is kept stopped. Further, when the state of the last mode use changeover switch 60d is ON, if the blower 33 is not operating immediately before the vehicle finally enters the power-off state, the air-conditioning control device 50 switches the vehicle to the power-on state thereafter. Immediately after returning, the operation of the blower 33 is maintained in a stopped state. Further, when the state of the last mode use changeover switch 60d is on, if the blower 33 is operating immediately before the vehicle finally enters the power-off state, the air-conditioning control device 50 switches the vehicle to the power-on state thereafter. Immediately after returning, the blower 33 is operated. The above is the same even if the blower 33 is replaced with the compressor 11.

  Therefore, depending on the state of the last mode use changeover switch 60d, when the vehicle is powered on, the stop of the compressor 11 and the blower 33 is maintained irrespective of the state immediately before the power off, or in accordance with the state immediately before the power off. Whether to control the compressor 11 and the blower 33 can be switched.

  As described above, when the operation content by the occupant satisfies the predetermined criterion, the operation state of the vehicle air conditioner 1 becomes the same as immediately before the power-off state when the power-off state changes to the power-on state. . Therefore, in response to the operation of the occupant, when changing from the power-off state to the power-on state, the operation state of the vehicle air conditioner 1 is set to be the same as that immediately before the power-off state, or the blower 33 and the compressor 11 It can be switched whether to keep the suspension. Further, by operating the air-conditioning control device 50 of the present embodiment, the same effect as that of the first embodiment can be obtained.

  In addition, by entrusting the right to determine the use of electric power to the occupant, the cruising distance of the vehicle increases. In addition, the occupants can be less dissatisfied with the influence of the air conditioning on the cruising distance.

(Third embodiment)
Next, a third embodiment will be described. The vehicle air conditioning system according to the present embodiment differs from the vehicle air conditioning system according to the second embodiment in two points. Specifically, as shown in FIG. 6, the operation panel 60 of the present embodiment is different from the operation panel 60 of the second embodiment in that the last mode use changeover switch 60d is eliminated and a last mode return switch 60e is added. Have been. Further, the air-conditioning control device 50 of the present embodiment executes the processing shown in FIG. 7 instead of the processing shown in FIG. 5 in the second embodiment.

  Hereinafter, the vehicle air conditioning system according to the present embodiment will be described mainly with respect to differences from the second embodiment. Elements denoted by the same reference numerals in FIGS. 4 and 6 are the same elements. Steps denoted by the same reference numerals in FIGS. 5 and 7 realize the same processing.

  After the power-off state has continued for a predetermined period (for example, 10 minutes or more, 1 hour or more, 1 day or more), it is assumed that the power-on state is caused by the occupant operating the power switch. Then, the air-conditioning control device 50 is re-energized and started up, and starts the processing in FIG.

  Then, in the process of FIG. 7, in step 101, the value of the return count is read from the above-mentioned nonvolatile storage medium. Then, it is determined whether or not the read value is equal to or greater than a predetermined reference value N.

  The return count is an amount that increases as the number of times the last mode return switch 60e is operated during a predetermined period in the past increases. Specifically, as described later, the value of the last mode return switch 60e increases each time the last mode return switch 60e is operated once. The predetermined period in the past is a period after shipment of the vehicle equipped with the vehicle air conditioning system and before the present. Therefore, when the vehicle equipped with the vehicle air conditioning system is shipped, the value of the return count in the nonvolatile storage medium is zero. The reference value N is a value of 2 or more. The reference value N may be a fixed value (for example, 5 times, 10 times). Alternatively, the reference value N may be a value that increases as the length of the predetermined period increases.

  When the value of the return count is equal to or greater than the reference value N, the air conditioning control device 50 proceeds from step 101 to step 104. If the value of the return count is smaller than the reference value N, the air conditioning control device 50 proceeds from step 101 to step 110.

  In step 110, as in the second embodiment, the air conditioning system 1 is maintained in the air conditioning system off state immediately before the last power off, regardless of whether the air conditioning system 1 is in the air conditioning system on state or the air conditioning system off state. Subsequently, in step 115, as in the second embodiment, the value "air conditioning system off" is recorded in the variable "last mode" in the above-mentioned nonvolatile storage medium. After step 115, the process proceeds to step 120.

  In step 120 following step 115, similarly to step 120 of the second embodiment, it is determined whether or not there is an air conditioning start operation. When it is determined that there is an air conditioning start operation, the process proceeds to step 130, and when it is determined that there is no air conditioning start operation, the process proceeds to step 122.

  In step 122, it is determined whether or not there is a return operation. The return operation means that the occupant operates the last mode return switch 60e. If there is no return operation, the process returns to step 120, and if there is a return operation, the process proceeds to step 124. As described above, after step 115, the air-conditioning control device 50 repeats the negative determination in steps 120 and 122 as long as neither the air-conditioning start operation nor the return operation is performed.

  The air-conditioning control device 50 proceeds from step 120 to step 130 if there is an air-conditioning start operation while repeating steps 120 and 122. The processing after step 130 is the same as the processing after step 130 in the second embodiment.

  Further, if there is a return operation while repeating steps 120 and 122, the air-conditioning control device 50 proceeds from step 122 to step 124. In step 124, the value of the return count in the above-mentioned nonvolatile storage medium is increased by one time (that is, by one).

  In step 104 following step 124 or step 101, it is determined whether or not the value of the last mode recorded in the above-mentioned nonvolatile storage medium is "air conditioning system on", as in the second embodiment. If "air conditioning system on", the process proceeds to step 106. If it is not "air conditioning system on", the process proceeds to step 110, and the air conditioning system off state is maintained.

  In step 106, the same state restoration as in step 106 of the second embodiment is performed, and the process proceeds to step 140. In the air-conditioning control process of step 140 following step 106, the amount read in step 106 is used as in the second embodiment. Therefore, by the air conditioning control process in step 140, the operating state of the vehicle air conditioner 1 becomes the same as immediately before the vehicle finally enters the power-off state.

  As described above, while the return count is smaller than the reference value N, the air-conditioning control device 50 according to the present embodiment operates immediately after power-on of the vehicle until one of the air-conditioning start operation and the return operation is performed. The compressor 11 and the blower 33 are kept stopped irrespective of the state immediately before turning off.

  Then, while the compressor 11 and the blower 33 are stopped, if there is a return operation, the air-conditioning control device 50 increases the value of the return count by one and adjusts the value to the state immediately before the last power-off. The compressor 11 and the blower 33 are controlled.

  When the return count becomes equal to or greater than the reference value N, the air conditioning control device 50 controls the compressor 11 and the blower 33 immediately after the vehicle is turned on, in accordance with the state immediately before the last power off.

  Therefore, based on the fact that the occupant has performed the return operation while the operation of the blower 33 and the compressor 11 is stopped, the air conditioning control device 50 finally changes the operation state of the vehicle air conditioner 1 to power off. Control is performed so as to be the same as before the state. When the number of times of the return operation is equal to or greater than the reference value, the air conditioning control device 50 changes the operation state of the vehicle air conditioner 1 to the power off state based on the fact that the vehicle is in the power on state. The control is performed so as to be the same as immediately before.

  As described above, when the number of active return operations by the occupant that sets the operating state of the vehicle air conditioner 1 to be the same as immediately before the power-off state is equal to or greater than the reference value, the air-conditioning control device 50 switches to the power-on state. Based on the change, the operation state of the vehicle air conditioner 1 is made the same as immediately before the power-off state. In this way, the power consumption can be further reduced by reflecting the occupant's preference contrary to the power consumption reduction not immediately but gradually.

(Fourth embodiment)
Next, a fourth embodiment will be described. The vehicle air conditioning system according to the present embodiment differs from the vehicle air conditioning system according to the second embodiment in three points. Specifically, as shown in FIG. 8, the operation panel 60 of the present embodiment is different from the operation panel 60 of the second embodiment in that the last mode use switch 60d is omitted. As shown in FIG. 8, the output of the eco switch 61 is input to the air conditioning control device 50. Further, the air-conditioning control device 50 of the present embodiment executes the processing shown in FIG. 9 instead of the processing shown in FIG. 5 in the second embodiment.

  Hereinafter, the vehicle air conditioning system according to the present embodiment will be described mainly with respect to differences from the second embodiment. Elements denoted by the same reference numerals in FIGS. 4 and 8 are the same elements. Steps denoted by the same reference numerals in FIGS. 5 and 9 realize the same processing.

  The eco switch 61 is a switch for turning on and off the eco mode. The eco switch 61 can be operated by an occupant of the vehicle during driving of the vehicle. When the eco switch 61 is on, the eco mode is on, and when the eco switch 61 is off, the eco mode is off.

  The eco mode is a mode in which a decrease in the amount of charge in a battery serving as a power supply source for the electric motor for traveling and the vehicle air conditioning system is suppressed as compared with the normal mode. For example, in the eco mode, the ratio of the increase in the voltage applied to the motor to the increase in the amount of depression of the accelerator pedal of the vehicle is smaller in the eco mode. Also, for example, in the eco mode, the ratio of the increase in the blower level to the increase in the set temperature during heating is smaller in the eco mode.

  The processing in FIG. 9 is different from the processing in FIG. 5 in that step 102 is replaced with step 210.

  After the power-off state has continued for a predetermined period (for example, 10 minutes or more, 1 hour or more, 1 day or more), it is assumed that the power-on state is caused by the occupant operating the power switch. Then, the air-conditioning control device 50 is re-energized and started up, and starts the processing in FIG.

  Then, in the process of FIG. 9, first, at step 210, it is determined whether or not the state of the eco switch 61 is on. If it is on, the process proceeds to step 110; if it is off, the process proceeds to step 104.

  When the state of the eco switch 61 is off, it means that the operation content by the occupant of the vehicle satisfies a predetermined standard. When the state of the eco switch 61 is ON, it means that the operation content by the occupant of the vehicle does not satisfy a predetermined standard.

  As described above, in the present embodiment, when the state of the eco switch 61 is on, the air conditioning control device 50 controls the blower immediately after the vehicle returns from the power-off state to the power-on state, as in the second embodiment. The operation of 33 is kept stopped. By doing so, it is possible to further reduce the power consumption in the eco mode.

  In addition, when the state of the eco switch 61 is off, if the blower 33 is not operating immediately before the vehicle finally enters the power-off state, the air-conditioning control device 50 immediately thereafter returns to the power-on state if the blower 33 does not operate. Then, the operation of the blower 33 is kept stopped. In addition, when the state of the eco switch 61 is off, if the blower 33 is operating immediately before the vehicle finally enters the power-off state, the air-conditioning control device 50 immediately thereafter returns to the power-on state after the vehicle has returned to the power-on state. Then, the blower 33 is operated.

  The above is the same even if the blower 33 is replaced with the compressor 11. Therefore, the same effects as those of the first and second embodiments can be obtained. Further, depending on the state of the eco switch 61, when the vehicle is powered on, the compressor 11 and the blower 33 are kept stopped irrespective of the state immediately before the power off, or in accordance with the state immediately before the power off. , The blower 33 can be switched.

(Fifth embodiment)
Next, a fifth embodiment will be described. The vehicle air conditioning system according to the present embodiment differs from the vehicle air conditioning system according to the second embodiment in three points. Specifically, the operation panel 60 of the present embodiment is different from the operation panel 60 of the second embodiment in that the last mode use changeover switch 60d is omitted. Further, the air-conditioning control device 50 of the present embodiment executes the processing shown in FIG. 10 instead of the processing shown in FIG. 5 in the second embodiment.

  Hereinafter, the vehicle air conditioning system according to the present embodiment will be described mainly with respect to differences from the second embodiment. Steps denoted by the same reference numerals in FIGS. 5 and 10 realize the same processing.

  The processing in FIG. 10 is different from the processing in FIG. 5 in that step 102 is replaced with steps 212 and 214.

  After the power-off state has continued for a predetermined period (for example, 10 minutes or more, 1 hour or more, 1 day or more), it is assumed that the power-on state is caused by the occupant operating the power switch. Then, the air-conditioning control device 50 is re-energized and started up, and starts the processing in FIG.

  Then, in the process of FIG. 10, first, at step 212, it is determined whether or not the user customizing function is on. The user customizing function is a function for adjusting the characteristics of each part of the vehicle (for example, the vehicle air conditioning system) for each owner of the vehicle equipped with the vehicle air conditioning system.

  The air-conditioning control device 50 determines whether the user customization function is on or off based on whether the value of the predetermined customization flag of the nonvolatile storage medium is on or off. The value of the customization flag is set immediately before the vehicle is delivered to the owner, and thereafter, is not changed by the user (including the owner) of the vehicle. The value of the customization flag is one of the setting values.

  The air-conditioning control device 50 proceeds to step 214 if the user customization function is on, and proceeds to step 104 if the user customization function is off. In step 214, it is determined whether or not the value of the variable of the air conditioning function is the value of "forced power consumption".

  The variable of the air-conditioning function indicates whether or not the power of the battery serving as the power supply source for the electric motor for traveling and the air-conditioning system for the vehicle is reduced more than usual for the air-conditioning function. The fact that the value of the air conditioning function is “forced power consumption” means that the power of the battery is saved more than usual. If the value of the air conditioning function is other than “forced power consumption”, it means that the battery power is used as usual.

  The value of the air conditioning function is recorded in the above-mentioned nonvolatile storage medium. The value of the air conditioning function is set immediately before the vehicle is delivered to the owner, and thereafter, is not changed by the user (including the owner) of the vehicle. The value of the variable called the air conditioning function is one of the set values.

  If the value of the air conditioning function is “forced power consumption” in step 214, the air conditioning control device 50 proceeds to step 110, and if not, proceeds to step 104.

  As described above, when the user customizing function is on and the value of the air conditioning function is the forced power consumption, the air conditioning control device 50 performs the second embodiment immediately after the vehicle returns from the power off state to the power on state. Similarly, the operation of the blower 33 is kept stopped. By doing so, it is possible to reduce the power when the setting of the vehicle is in a power saving trend.

  In addition, when the user customizing function is off, if the blower 33 is not operating immediately before the vehicle finally enters the power-off state, the air-conditioning control device 50 outputs the blower immediately after the vehicle returns to the power-on state. The operation of 33 is kept stopped. In addition, when the user customizing function is off, the air conditioning control device 50 operates the blower 33 immediately after the vehicle returns to the power-on state if the blower 33 is operating immediately before the vehicle finally enters the power-off state. Activate 33.

  When the user customizing function is on and the value of the air conditioning function is not the forced power consumption, the operation of the air conditioning control device 50 is as follows. That is, if the blower 33 is not operating immediately before the vehicle finally enters the power-off state, the operation of the blower 33 is maintained in a stopped state immediately after the vehicle returns to the power-on state. If the blower 33 is operating immediately before the vehicle finally enters the power-off state, the blower 33 is operated immediately after the vehicle returns to the power-on state. The above is the same even if the blower 33 is replaced with the compressor 11.

  If at least one of the value of the user customization flag is off and the value of the air conditioning function is not “forced power consumption”, the setting value satisfies a predetermined criterion. I do. When the value of the user customization flag is ON and the value of the air conditioning function is “forced power consumption”, this corresponds to the case where the set value does not satisfy the predetermined criterion.

  As described above, when the above-described set value does not satisfy the predetermined criterion, the air conditioning control device 50 maintains the operation stop of the blower 33 and the compressor 11 based on the fact that the vehicle has been turned on.

  Further, when a predetermined set value in the storage medium satisfies a predetermined criterion, when the power-off state changes to the power-on state, the operation and non-operation of the blower 33 and the compressor 11 are set to the power-off state. It will be the same as before. Therefore, according to a predetermined setting, when changing from the power-off state to the power-on state, the operation and non-operation of the blower 33 and the compressor 11 are set to be the same as immediately before the power-off state, or It is possible to switch whether to keep the compressor 11 stopped.

(Summary of First to Fifth Embodiments)
In the first to fifth embodiments, the air-conditioning control device 50 functions as a stop maintaining unit by executing steps 110 and 120 in FIGS. 3, 5, 7, 9, and 10.

  In the second embodiment, the air-conditioning control device 50 functions as a determination unit by executing step 102 in FIG. 5, and executes the steps 104, 106, and 140 in FIG. Function as

  In the third embodiment, the air-conditioning control device 50 functions as a first last mode return unit by executing steps 124, 104, 106, and 140 in this order in FIG. Executing steps 106 and 140 in this order functions as a second last mode return unit.

  In the fourth embodiment, the air-conditioning control device 50 functions as a determination unit by executing step 210 in FIG. 9, and executes the steps 104, 106, and 140 in FIG. Function as

  In the fifth embodiment, the air-conditioning control device 50 functions as a determination unit by executing steps 212 and 214 in FIG. 10, and executes the steps 104, 106 and 140 in FIG. Functions as return means.

(Other embodiments)
Note that the present invention is not limited to the above-described embodiment, and can be appropriately changed. The above embodiments are not irrelevant to each other, and can be appropriately combined unless a combination is clearly not possible. Further, in each of the above embodiments, elements constituting the embodiments are not necessarily essential, unless otherwise clearly indicated as essential or in principle considered to be clearly essential. In each of the above embodiments, when a numerical value such as the number, numerical value, amount, range, or the like of the constituent elements of the exemplary embodiment is mentioned, it is particularly limited to a specific number when it is clearly stated that it is essential and in principle The number is not limited to the specific number unless otherwise specified. In particular, when a plurality of values are exemplified for a certain amount, it is also possible to adopt a value between the plurality of values, unless otherwise specified and unless it is clearly impossible in principle. . Further, in each of the above embodiments, when referring to the shape of components and the like, the positional relationship, and the like, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc., the shape, It is not limited to a positional relationship or the like. In addition, the present invention allows the following modifications to the above embodiments and modifications within an equivalent range. The following modifications can be independently applied or not applied to the above embodiment. That is, any combination of the following modifications can be applied to the above embodiment.

(Modification 1)
In the above embodiment, an electric vehicle is exemplified as a vehicle on which the vehicle air conditioning system is mounted. However, the vehicle air conditioning system is not limited to an electric vehicle, and may be mounted on a vehicle having only an internal combustion engine as a prime mover. In this case, the IG on state in which the ignition device of the internal combustion engine can be energized corresponds to the power on state, and the IG off state in which the ignition device of the internal combustion engine cannot be energized corresponds to the power off state. Further, the vehicle air conditioning system may be mounted on a hybrid vehicle having both a traveling electric motor and an internal combustion engine as prime movers.

(Modification 2)
In the above embodiment, the refrigeration cycle device 10 included in the vehicle air conditioner 1 is a heat pump cycle. However, the cycle device included in the vehicle air conditioner 1 is not limited to a heat pump cycle.

  For example, the cycle device included in the vehicle air conditioner 1 includes only the indoor evaporator 19 among the indoor condenser 12 and the indoor evaporator 19, and may be used exclusively for cooling the blown air. Alternatively, the cycle device included in the vehicle air conditioner 1 may include only the indoor condenser 12 among the indoor condenser 12 and the indoor evaporator 19, and may be used exclusively for heating the blast air.

(Modification 3)
In the above embodiment, the air-conditioning control device 50 is in a state of not operating when the vehicle is in the power-off state. However, the air conditioning control device 50 may be operating when the vehicle is in the power off state. In this case, when the vehicle is in the power-off state, the air-conditioning control device 50 keeps the blower 33 and the compressor 11 stopped.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 10 Refrigeration cycle device 11 Compressor 33 Blower 50 Air conditioning controller

Claims (4)

Controls a device to be controlled by a vehicle air conditioner (1) mounted on a vehicle that switches between a power-on state in which a prime mover that generates driving power can be energized and a power-off state in which the prime mover cannot be energized. Air conditioning control device,
Immediately before the vehicle finally changes from the power-on state to the power-off state, the blower (33) for flowing blast air into the vehicle compartment is operating, and the vehicle is in the power-off state. If actuation of the blower is stopped, based on which the vehicle is turned to the power on state from the power-off state, have a stop maintaining means (110, 120) to maintain the operation stop of the blower,
Based on the return operation by the occupant of the vehicle while the stop maintaining means is maintaining the operation stop of the blower, the operation and non-operation of the blower are performed last from the power-on state. First last mode return means (124, 104, 106, 140) for controlling the blower so as to be the same as immediately before the power-off state;
When the number of times the return operation is performed is equal to or more than a reference value, based on the fact that the vehicle is in the power-on state, the operation or non-operation of the blower is performed when the vehicle is finally switched from the power-on state. Second last mode return means (101, 104, 106, 140) for controlling the blower so as to be the same as immediately before the power-off state,
The air conditioning control device, wherein the reference value is 2 or more. In a cycle device (10) provided with a heat exchanger (12, 19) for cooling or heating the blast air by exchanging heat with the blast air and a refrigerant, a compressor (11) sucks the refrigerant. Then compress and discharge
The stop maintaining means is configured to operate the compressor immediately before the vehicle finally changes from the power-on state to the power-off state, and that the compression is performed when the vehicle is in the power-off state. The air conditioning control device according to claim 1, wherein when the operation of the compressor is stopped, the operation stop of the compressor is maintained based on the change of the vehicle from the power off state to the power on state.   The stop maintaining means is configured to operate the blower immediately before the vehicle finally changes from the power-on state to the power-off state, and to operate the blower when the vehicle is in the power-off state. The air-conditioning control device according to claim 1, wherein when the vehicle stops, the operation of the blower is stopped until the occupant of the vehicle performs a predetermined air-conditioning start operation after the vehicle enters the power-on state. .   The stop maintaining means, based on the vehicle being in the power-on state, when the blower is not operating immediately before the vehicle finally enters the power-off state from the power-on state, The air conditioning control device according to any one of claims 1 to 3, wherein the operation stop of the blower is maintained.

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