Air conditioner for vehicle

Abstract

To provide comfortable environment within a cabin for crew members on board while restraining energy expenditure of an air conditioning.SOLUTION: In an air conditioner for a vehicle which comprises an air conditioning unit, which includes a blower, a hygroscopic material into which air blown from the blower flows and a heat exchange part into which air hygroscopically absorbed by the hygroscopic material flows, and a control device which is capable of controlling to automatically start pre-air conditioning on the basis of establishment of start condition, the control device makes it possible to execute a first control which reaches temperature in a cabin to target value after completing regeneration of the hygroscopic material and a second control which performs the regeneration of the hygroscopic material after reaching the temperature in the cabin to the target value. The control device controls either of the first control or the second control on the basis of finite difference between expected end time of the pre-air conditioning and boarding time of crew members when the start condition of the pre-air conditioning is established.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vehicle air conditioner.

Background Art

[0002] Conventionally, a desiccant type vehicle air conditioner that can suppress energy consumption and dehumidify by using a moisture absorbent in an air conditioning unit has been known.

[0003] For example, in the desiccant type vehicle air conditioner of Patent Document 1, an air introduction path that communicates an air intake port from outside the vehicle and an air discharge port into the vehicle interior, and a regeneration path that takes in air inside or outside the vehicle and discharges it outside the vehicle are provided, and a moisture absorbent is provided at a position adjacent to the air introduction path and the regeneration path. The moisture absorbent absorbs moisture in the air at the part located in the air introduction path to dehumidify, and then moves to the regeneration path and discharges the moisture of the air passing through the regeneration path, so that regeneration for restoring the moisture absorption performance is possible.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the desiccant type vehicle air conditioner of Patent Document 1, the rotation of the moisture absorbent for performing dehumidification and regeneration simultaneously is performed regularly or irregularly, and the timing when the occupant gets on the vehicle is not considered. Therefore, depending on the timing when the occupant gets on the vehicle, it is also assumed that the moisture absorbent has advanced in moisture absorption. In this case, in order to dehumidify the air containing moisture, after sufficiently supercooling, the air conditioning energy consumption for heating to a comfortable temperature increases, and a problem occurs that a comfortable environment in the vehicle interior cannot be provided despite the occupant getting on the vehicle.

[0006] The present invention has been made in view of such circumstances, and an object thereof is to provide a comfortable environment in the vehicle interior for the passengers while suppressing air-conditioning energy consumption.

Means for Solving the Problems

[0007] The vehicle air conditioner according to the present invention includes an air conditioner unit having a blower, a moisture absorbent into which the air blown by the blower flows, and a heat exchanger into which the air absorbed by the moisture absorbent flows, and a control device capable of automatically starting pre-air conditioning based on the establishment of start conditions. In the vehicle air conditioner, the control device dehumidifies and heats the air absorbed by the moisture absorbent by the heat exchanger, sends the dehumidified and heated air into the vehicle interior, and regenerates the moisture absorbent by introducing the air sent into the vehicle interior to the upstream side of the moisture absorbent, and is capable of executing a reheat operation. After completing the regeneration of the moisture absorbent by executing the reheat operation, a first control for reaching the target value of the temperature in the vehicle interior, and after reaching the target value of the temperature in the vehicle interior by executing the reheat operation, a second control for regenerating the moisture absorbent are executable. When the start condition of the pre-air conditioning is satisfied, the predicted end time of the pre-air conditioning and the boarding time of the passenger are acquired. When the difference between the acquired predicted end time of the pre-air conditioning and the boarding time of the passenger is a first predetermined time, the first control is executed. When the difference between the acquired predicted end time of the pre-air conditioning and the boarding time of the passenger is a second predetermined time shorter than the first predetermined time, the second control is executed. A vehicle air conditioner is provided.

[0008] Further, the air conditioner unit has an air damper for closing an air inlet through which outside air is introduced, and the control device is capable of controlling the opening and closing of the air damper. When executing the reheat operation, it is preferable to close the air damper to close the air inlet.

[0009] Further, in the second control, when the control device determines that the regeneration of the moisture absorbent is completed when the temperature inside the vehicle reaches the target value, the second control may be terminated without executing the control for regenerating the moisture absorbent.

Advantages of the Invention

[0010] According to the present invention, it is possible to provide a comfortable environment inside the vehicle for the passengers while suppressing the consumption of air conditioning energy.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different figures indicate parts having the same function, and redundant descriptions in each figure are omitted as appropriate.

[0013] [Example of System Configuration of Vehicle Air Conditioner] FIG. 1 shows a configuration example of a vehicle air conditioner 1 according to an embodiment of the present invention. The configuration example shown here is an example and is not particularly limited to a specific configuration.

[0014] The vehicle air conditioner 1 includes a refrigerant circuit 10, a heat medium circuit 30, and an air conditioning unit 20. The air conditioning unit 20 includes a blower 23 that introduces air from inside the vehicle compartment (inside the vehicle) or outside the vehicle (outside the vehicle) into the interior, a moisture absorbent 52 that absorbs moisture in the air introduced by the blower 23, an indoor heat exchanger 22 (for cooling air) through which the air absorbed by the moisture absorbent 52 passes, an indoor heat exchanger 21 (for heating air) through which the air cooled by the indoor heat exchanger 22 passes, and an air damper 24 that adjusts the rate of air passing through the indoor heat exchanger 21. Further, the air conditioning unit 20 includes an air damper 25 provided upstream of the blower 23 in the air inflow direction, which switches the air introduced into the blower 23 to either the inside or outside of the vehicle. The indoor heat exchanger 22 (for cooling air) and the indoor heat exchanger 21 (for heating air) constitute a heat exchange section.

[0015] In the air conditioning unit 20, the air introduced by the blower 23 passes through the indoor heat exchangers 21 and 22 and is blown into the vehicle compartment. The air introduced by the blower 23 passes through the indoor heat exchanger 22 and then through the indoor heat exchanger 21 and is blown into the vehicle compartment when the air damper 24 shown in FIG. 1 is fully open. Further, when the air damper 24 is fully closed, the inflow side of the indoor heat exchanger 21 is blocked, and the air introduced by the blower 23 passes only through the indoor heat exchanger 22 and is blown into the vehicle compartment.

[0016] In the air conditioning unit 20, the air damper 25 can selectively close the air inlet 25A connected to the outside and the air inlet 25B connected to the inside of the vehicle, and take in air from either one. Further, in the air conditioning unit 20, the control device 100 can take in air from both the air inlet 25A and the air inlet 25B, from the outside or inside of the vehicle, at a desired rate, by setting the air damper 25 at a desired position between the air inlet 25A and the air inlet 25B (opening and closing control).

[0017] Note that performing air conditioning operation with the air inlet 25A closed corresponds to known recirculation operation, and performing air conditioning operation with the air inlet 25B closed corresponds to known fresh air operation.

[0018] The moisture absorbent 52 is configured by providing a desiccant (e.g., silica gel, zeolite) in a circular rotor (desiccant rotor). The upper half faces the downstream side of the blower 23, and the lower half faces the ventilation passage 45. Also, the circular rotor (desiccant rotor) is rotatable by a motor 51 and can be varied between a position facing the downstream side of the blower 23 and a position facing the ventilation passage 45. By providing the moisture absorbent 52 to absorb moisture, the dehumidified air can be made to face the indoor heat exchanger 22 (for cooling air) and the indoor heat exchanger 21 (for heating air). Therefore, compared to the case where the moisture absorbent 52 is not provided, the energy required for cooling and heating can be suppressed. When the vehicle is stopped and the outside air is low temperature and high humidity, the moisture absorption of the moisture absorbent 52 progresses more in the state where the air inlet 25B is closed (outside air) than in the state where the air inlet 25A is closed (inside air). Also, even when the moisture absorption of the moisture absorbent 52 has progressed, if the outside air becomes high temperature and low humidity, the moisture will evaporate and the moisture absorption function can be naturally regenerated.

[0019] [Control device] The vehicle air conditioner 1 includes a control device 100 shown in FIG. 2. The control device 100 controls the above-described air conditioning unit 20 and motor 51 based on various input signals 60 (such as an air conditioning instruction signal and a charger connection signal) and detection signals from the sensor unit 40.

[0020] The sensor unit 40 that inputs detection signals to the control device 100 includes, for example, an outside air sensor 41 that detects the outside air conditions such as the outside air temperature and outside air humidity, a humidity sensor 42 that detects the moisture content in the air immediately after being absorbed by the moisture absorbent 52, a temperature sensor 43 that detects the temperature of the air immediately after being cooled by the indoor heat exchanger 22, and an inside air sensor 44 that detects the indoor conditions such as the inside air temperature and inside air humidity.

[0021] The vehicle air conditioner 1 can execute known pre - air - conditioning. Specifically, when a signal regarding the operation setting of pre - air - conditioning is input as an input signal 60 to the control device 100, the pre - air - conditioning is executed. The pre - air - conditioning is a function that automatically starts the operation of the air - conditioning unit 20 from before the set time so that the temperature in the interior becomes the set temperature at the preset time. Thereby, a comfortable environment in the interior can be provided when the passengers get on the vehicle.

[0022] Also, the vehicle air conditioner 1 can execute re - heat operation. Specifically, the air damper 25 is operated so as not to take in outside air, and the air inlet 25A is closed to perform recirculation operation. The air volume of the blower 23 is set to the maximum, and air is sent into the moisture absorber 52 to absorb moisture in the air by the moisture absorber 52. Then, the air that has passed through the moisture absorber 52 is cooled by the indoor heat exchanger 22. By this cooling, the moisture in the air becomes water droplets and is discharged outside the vehicle, for example. Then, the dehumidified air is heated by the indoor heat exchanger 21. And the dehumidified and heated air is introduced into the interior. Thereby, it becomes possible to adjust the interior environment before getting on the vehicle. Further, by introducing the air introduced into the interior to the upstream side of the moisture absorber 52, the dehumidified and heated air flows into the moisture absorber 52. Thereby, the moisture of the moisture absorber 52 evaporates, and it becomes possible to regenerate the moisture - absorbing function. Thus, the operation for circulating the dehumidified and heated air in the interior and the moisture absorber 52 corresponds to the re - heat operation.

[0023] By repeating the above-described cycle through reheating operation, dehumidified and warmed air can be introduced into the room, thereby realizing a comfortable environment in the room. Further, by allowing the dehumidified and heated air to flow into the moisture absorbent 52, the drying of the moisture absorbent 52 proceeds, and regeneration can be realized to restore the moisture absorption function of the moisture absorbent 52. Also, by operating the air damper 25 to close the air inlet 25A so as not to take in outside air, the drying efficiency of the moisture absorbent 52 can be improved. When allowing the dehumidified and heated air to flow into the moisture absorbent 52, it is preferable to rotate the moisture absorbent 52 by the motor 51 in order to dry the entire moisture absorbent 52. Also, it is preferable to close the outlet of the ventilation passage 45 with an air damper in order to improve the drying efficiency.

[0024] [Configuration of Control Device in Electric Vehicle (EV)] As shown in FIG. 3, the control device 100 provided in the vehicle air conditioner 1 is configured as one ECU connected via the in-vehicle network L to various ECUs (Electronic Control Units) that control the electric vehicle EV. The control device 100 includes a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, an I / F (Interface) 104 for input / output, an I / F (Interface) 105 for in-vehicle communication, etc., and each hardware is interconnected via a bus 106.

[0025] The CPU 101 executes the control of the control device 100 by executing various programs stored in the ROM 102. The ROM 102 is a non-volatile memory. For example, the ROM 102 stores programs executed by the CPU 101, data necessary for the CPU 101 to execute the programs, and the like. The RAM 103 is a main storage device such as a DRAM (Dynamic Random Access Memory) or an SRAM (Static Random Access Memory).

[0026] For example, the RAM 103 functions as a working area used when the CPU 101 executes a program. The I / F 104 for input / output is connected to various sensors and monitors installed in the EV, inputs data to the CPU 101, and outputs the data processed by the CPU 101 through arithmetic operations. The I / F 105 for in-vehicle communication is connected to the in-vehicle network L to control data transmission and reception with other ECUs set in the EV.

[0027] When data regarding the surrounding environmental information or data regarding the driving status of the EV is input via the I / F 104 for input / output or the I / F 105 for in-vehicle communication, the control device 100 executes the control of the vehicle air conditioner 1 described above according to the program executed by the CPU 101.

[0028] The EV is equipped with a battery B. The battery B is charged by connecting the plug PS of the charger to the battery plug BP, and power is supplied to the vehicle air conditioner 1 via the battery B. The state in which the plug PS is connected to the battery plug BP is transmitted to the control device 100 via the in-vehicle network L as a charger connection signal.

[0029] Also, when the plug PS is connected to the battery plug BP, the control device 100 can receive a signal transmitted from an external communication means (for example, a mobile terminal possessed by a passenger, keyless, etc.). An example of the signal to be transmitted is the signal regarding the operation setting of the pre-air conditioning (for example, a signal including information such as the operation start time, operation time, set temperature, etc.) described above.

[0030] [Processing Controlled by the Control Device] When the control device 100 receives a signal related to the operation setting of pre-air conditioning as the input signal 60, it can perform the following controls on the vehicle air conditioner 1: control to execute pre-air conditioning after completing the regeneration of the moisture absorbent 52 (first control with priority given to regeneration), control to complete the regeneration of the moisture absorbent 52 after executing pre-air conditioning (second control with priority given to pre-air conditioning), and control to execute only pre-air conditioning (normal pre-air conditioning control). More precisely, it can be divided into three controls: the first control with priority given to regeneration (with reheating operation), the second control with priority given to pre-air conditioning (with reheating operation), and normal pre-air conditioning control (without reheating operation). Details will be described below.

[0031] Specifically, as shown in FIG. 4, when, in step S11, the plug PS of the charger is connected to the battery plug BP and charging is being performed, and power is being supplied to the vehicle air conditioner 1 via the battery B (during charging), the process proceeds to step S12. In step S12, a signal related to the operation setting of pre-air conditioning is received. When a signal related to the operation setting of pre-air conditioning is received, it is determined that the start condition of pre-air conditioning is satisfied, and the process proceeds to step S13. That is, the control device 100 is configured to receive a signal related to the operation setting of pre-air conditioning only when it is in the charging state. Note that the reception of the signal may be set by a timer in advance, may be received in real time from a mobile terminal, keyless device, etc., or may be automatically received retrospectively by accumulating the daily boarding times of the passengers.

[0032] In step S13, the control device 100 determines whether a predetermined time has elapsed since the starting point. As the starting point, it is assumed to be the time when the previous passenger boarded or got off, or the time when the air conditioner was used last time. As the predetermined time, for example, 5 hours is assumed. If 5 hours have elapsed since the previous passenger got off, it is determined that the predetermined time has elapsed, and the process proceeds to step S14. If 5 hours have not elapsed since the previous passenger got off, it is determined that the predetermined time has not elapsed, and the process proceeds to step S14. Note that the boarding time of the previous passenger, the getting-off time of the previous passenger, and the air conditioner usage time of the previous time are stored in the RAM 103 as information. When making the determination in step S13, the stored information may be read out and compared with the current time as the starting point. Also, the predetermined time may vary depending on the season. For example, the predetermined time may be configured to be shorter in winter than in summer.

[0033] In step S14, the control device 100 determines whether the environment outside the vehicle is in a low-temperature and high-humidity state based on the outside air temperature information and outside air humidity information input from the outside air sensor 41. If it is in a low-temperature and high-humidity state, the process proceeds to step S15. If it is not in a low-temperature and high-humidity state, the process proceeds to step S19. Note that low-temperature and high-humidity is assumed to be, for example, a temperature of 10 degrees or less and a humidity of 80% or more. Also, in the case of a vehicle without the outside air sensor 41, the determination of low-temperature and high-humidity may be made using a rain drop sensor provided on the wiper. Or, in the case of a connected car, the weather information around the vehicle may be acquired to make the determination of low-temperature and high-humidity.

[0034] In step S15, the control device 100 acquires the outside air temperature information and outside air humidity information at the predicted pre-air conditioning end time of the vehicle air conditioner 1. And when the outside air temperature information and outside air humidity information at the predicted pre-air conditioning end time of the vehicle air conditioner 1 are acquired, the process proceeds to step S16.

[0035] Here, an example will be given to explain that the predicted pre - air - conditioning end time of the vehicle air - conditioning device 1 varies depending on the outside air temperature and outside air humidity on that day. For example, assume that there is a passenger who uses the vehicle at 7:00 every morning. Also, assume that the target set temperature inside the vehicle by the pre - air - conditioning of the vehicle air - conditioning device 1 is 27 degrees, and the pre - air - conditioning starts at 6:30 by timer setting. Also, assume that the outside air temperature at 6:30 on a certain day is 10 degrees and the outside air humidity is 80%, and the outside air temperature at 6:30 on another day is 15 degrees and the outside air humidity is 80%. In this case, if the pre - air - conditioning is started at the same 6:30, the former takes a longer time to reach the target set temperature of 27 degrees than the latter. Then, when the pre - air - conditioning is executed based on the outside air situation (outside air temperature, outside air humidity) at 6:30, calculate how much time is required to reach the target set temperature, and set it as the predicted pre - air - conditioning end time. In this way, the predicted pre - air - conditioning end time of the vehicle air - conditioning device 1 varies, and the control device 100 is configured to obtain the predicted pre - air - conditioning end time that can vary depending on the outside air temperature and outside air humidity on that day.

[0036] Returning to the description of FIG. 4 again. In step S16, the control device 100 acquires the outside air temperature information and outside air humidity information at the predicted pre - air - conditioning end time, and based on the acquired information, determines whether the moisture - absorbing material 52 is in a state where regeneration is required (a state where the moisture - absorbing function is lost). For example, if the outside air temperature information and outside air humidity information do not change much from the current time at the predicted pre - air - conditioning end time, it is determined that the moisture - absorbing material 52 is in a state where regeneration is required, and the process proceeds to step S17. If a rapid temperature rise occurs before the predicted pre - air - conditioning end time and it seems to be high temperature and low humidity at the predicted pre - air - conditioning end time, it is determined that the regeneration of the moisture - absorbing material 52 is not required, and the process proceeds to step S19.

[0037] In step S17, the control device 100 determines whether the time (difference) calculated using the predicted pre - air - conditioning end time and the passenger's boarding time (7 o'clock in the above - mentioned example) is equal to or greater than a first predetermined time (whether the time is long). If it is determined that the time is long, the process proceeds to step S31. If the time is not long, the process proceeds to step S18. Note that, for example, 20 minutes is assumed as the first predetermined time. Also, the passenger's boarding time may be, for example, a predetermined time (e.g., 30 minutes) after receiving a signal regarding the operation setting of the pre - air - conditioning, or the daily boarding times may be accumulated and used as the average value of the accumulated boarding times.

[0038] In step S18, the control device 100 determines whether the time (difference) calculated using the predicted pre - air - conditioning end time and the passenger's boarding time (7 o'clock in the above - mentioned example) is less than the minimum value of a second predetermined time (whether the time is short). If it is determined that the time is short, the process proceeds to step S19. If the time is neither long nor short, the process proceeds to step S21. Note that, for example, 5 minutes is assumed as the minimum value of the second predetermined time. That is, in the case of negating both step S17 and step S18, it is assumed that the difference is from 5 minutes to 19 minutes, and 5 minutes to 19 minutes corresponds to the second predetermined time.

[0039] In step S19, the control device 100 executes normal pre - air - conditioning control and performs processing to reach the set temperature set by the passenger. Then, when the set temperature set by the passenger is reached and the normal pre - air - conditioning control ends, the flowchart of FIG. 4 ends.

[0040] In step S21, the control device 100 starts executing a second control that prioritizes pre - air - conditioning. Specifically, in step S22, the above - mentioned reheating operation is started. In step S23, it is determined whether the target value (e.g., the above - mentioned target set temperature of 27 degrees) has been reached. If the target value has not been reached, the processes of step S22 and step S23 are repeatedly executed. When the target value is reached, the process proceeds to step S24.

[0041] In step S24, the control device 100 determines whether the regeneration of the moisture absorbent 52 is completed. For example, when the humidity information input from the humidity sensor 42 exceeds a predetermined threshold value, the control device 100 determines that the regeneration of the moisture absorbent 52 is not completed, and transfers the process to step S25. When the humidity information does not exceed the predetermined threshold value, the control device 100 determines that the regeneration of the moisture absorbent 52 is completed, and transfers the process to step S37.

[0042] Note that even when the processes of steps S21 to S23 are being executed, since the internal air circulation by the reheating operation is being performed, the air that has been dehumidified and warmed by heating flows into the moisture absorbent 52. Therefore, in step S23, when it is determined that the target value (for example, the target set temperature of 27 degrees described above) has been reached, a case where the regeneration of the moisture absorbent 52 is completed is also assumed. In this case, without executing the processes of steps S25 to S26 even once, the process is transferred to step S37. Thereby, it is possible to suppress an increase in the control load of the control device 100 due to executing the reheating operation more than necessary.

[0043] In step S25, the control device 100 continues to execute the reheating operation. In step S26, when the elapse of the regeneration time is measured, the process is transferred back to step S24 again, and the processes of steps S25 and S26 are repeatedly executed until it is determined in step S24 that the regeneration of the moisture absorbent 52 is completed. Note that, for example, 10 minutes is assumed as the regeneration time.

[0044] In step S31, the control device 100 starts executing the first control that prioritizes regeneration. Specifically, in step S32, the above-described reheating operation is started. In step S33, when the elapse of the regeneration time is measured, the process is transferred to step S34.

[0045] In step S34, the control device 100 determines whether the regeneration of the moisture absorbent 52 is completed. For example, if the humidity information input from the humidity sensor 42 exceeds a predetermined threshold value, the control device 100 determines that the regeneration of the moisture absorbent 52 is not completed, and transfers the process to step S32. If it does not exceed the predetermined threshold value, the control device 100 determines that the regeneration of the moisture absorbent 52 is completed, and transfers the process to step S35.

[0046] In step S35, the control device 100 continues to execute the reheating operation. In step S36, it determines whether the target value (for example, the aforementioned target set temperature of 27 degrees) has been reached. If the target value has not been reached, the processes of step S35 and step S36 are repeatedly executed. If the target value has been reached, the process is transferred to step S37. Then, in step S37, the reheating operation of the vehicle air conditioner 1 is terminated, and the pre-air conditioning is completed, and the flowchart of FIG. 5 is terminated. Note that in step S35, normal pre-air conditioning control (without reheating operation) may be executed without performing the reheating operation.

[0047] As described above, when the pre-air conditioning end prediction time is obtained in step S15 and the time (difference) calculated using the pre-air conditioning end prediction time and the passenger boarding time (7 o'clock in the aforementioned example) is equal to or greater than the first predetermined time, the processes of steps S31 to S36 are performed. When the time (difference) calculated using the passenger boarding time (7 o'clock in the aforementioned example) is equal to the second predetermined time, the processes of steps S21 to S26 are performed. That is, when there is sufficient time until the passenger boarding time, first, the process related to the regeneration of the moisture absorbent 52 is preferentially executed, and after completion, the process related to the pre-air conditioning is executed. When there is not enough time until the passenger boarding time, first, the process for reaching the target temperature in the room is preferentially executed, and after completion, the process related to the regeneration of the moisture absorbent 52 is executed.

[0048] Thus, when there is sufficient time until the passenger's boarding time, it is possible to provide a comfortable environment inside the vehicle according to the timing when the passenger boards, and at the same time, to optimize the state of the moisture absorbent 52, so that an increase in air-conditioning energy consumption can be suppressed. Also, when there is not enough time until the passenger's boarding time, first, by prioritizing the provision of a comfortable environment inside the vehicle according to the timing when the passenger boards, it is possible to prevent the passenger from feeling discomfort. Also, while prioritizing the provision of a comfortable environment inside the vehicle, it is possible to allow the air that has been dehumidified and warmed by reheating operation to flow into the moisture absorbent 52, and at the same time, by restoring the moisture absorption function of the moisture absorbent 52, an increase in air-conditioning energy consumption can be suppressed. Also, by suppressing an increase in air-conditioning energy consumption, the cruising range of the vehicle can be extended.

[0049] In addition, in steps S24 and S34, humidity information input from the humidity sensor 42 was acquired to determine whether the regeneration of the moisture absorbent 52 was completed. However, when the humidity sensor 42 is not provided, it may be substituted with another sensor. For example, stop the cooling and heating by the reheating operation and only perform the air blowing by the blower 23. Then, detect the blown air with the temperature sensor 43 or the inside air sensor 44, and determine whether the regeneration of the moisture absorbent 52 is completed based on the detected temperature information. This can suppress the cost of providing the humidity sensor 42 and determine whether the regeneration of the moisture absorbent 52 is completed. On the other hand, as described above, when acquiring the humidity information input from the humidity sensor 42 and determining whether the regeneration of the moisture absorbent 52 is completed, there is no need to stop the cooling and heating by the reheating operation, so that time can be shortened and the control process can be simplified.

[0050] As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and design changes and the like within the scope not departing from the gist of the present invention are also included in the present invention.

Explanation of Reference Numerals

[0051] 1: Vehicle air conditioning device, 10: Refrigerant circuit, 20: Air conditioning unit, 30: Heat medium circuit 21, 22: Indoor heat exchanger, 23: Blower, 24, 25: Air damper, 25A, 25B: Air inlet 41: Outside air sensor, 42: Humidity sensor, 43: Temperature sensor, 44: Inside air sensor 51: Motor, 52: Moisture absorbent 60: Input signal, 100: Control device

Claims

1. An air conditioner unit having a blower, a moisture absorbent into which the air blown by the blower flows, and a heat exchanger into which the air absorbed by the moisture absorbent flows, In a vehicle air conditioner provided with a control device capable of automatically starting pre-air conditioning based on the establishment of a start condition, The control device, It is possible to execute a reheating operation in which the air absorbed by the moisture absorbent is dehumidified and heated by the heat exchanger, the dehumidified and heated air is sent into the vehicle interior, and the moisture absorbent is regenerated by introducing the air sent into the vehicle interior to the upstream side of the moisture absorbent, After completing the regeneration of the moisture absorbent by executing the reheating operation, a first control for bringing the temperature in the vehicle interior to a target value, After bringing the temperature in the vehicle interior to the target value by executing the reheating operation, a second control for regenerating the moisture absorbent can be executed, When the start condition of the pre-air conditioning is satisfied, the estimated end time of the pre-air conditioning and the boarding time of the passenger are acquired, When the difference between the acquired estimated end time of the pre-air conditioning and the boarding time of the passenger is a first predetermined time, the first control is executed, A vehicle air conditioner that executes the second control when the difference between the acquired estimated end time of the pre-air conditioning and the boarding time of the passenger is a second predetermined time shorter than the first predetermined time.

2. The air conditioner unit, Has an air damper for closing the air inlet through which outdoor air is introduced, The control device, Is capable of opening and closing control of the air damper, and when executing the reheating operation, closes the air damper to close the air inlet. The vehicle air conditioner according to claim 1.

3. The control device, In the second control, when it is determined that the regeneration of the moisture absorbent is completed when the temperature in the vehicle interior reaches the target value, the second control is terminated without executing the control for regenerating the moisture absorbent. The vehicle air conditioner according to claim 1 or claim 2.

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