JP5959301B2 - Vehicle air conditioner and vehicle - Google Patents

Description

  The present invention relates to an air conditioner mounted on a vehicle that can be driven by an engine and has an automatic engine start / stop function capable of automatically starting and stopping the engine, and a vehicle equipped with the air conditioner. is there.

  In a vehicle that can be driven by this type of engine and has an automatic engine start / stop function that can automatically start and stop the engine, for example, as disclosed in Patent Document 1 and the like, a refrigeration cycle is provided. The drive of the composing compressor is usually linked to the operating state of the engine, such that when the engine starts, the drive of the compressor is turned on, and when the engine stops, the drive of the compressor is also turned off. . When the compressor is turned on when the engine is in operation, the compressor is turned off when the evaporator temperature is lower than the compressor OFF set temperature, and when the compressor temperature is higher than the compressor ON set temperature. A normal intermittent operation for preventing the evaporator from freezing is performed in which the drive is turned on.

JP 2001-213151 A

  However, if the driving of the compressor is always linked with the start of the vehicle engine, the engine that has been stopped is started as the signal of the traffic light changes to blue as shown in FIG. If the compressor is turned on in conjunction with the start of the engine at the time of acceleration for accelerating the vehicle when the vehicle starts to travel, there is a disadvantage that the acceleration of the vehicle deteriorates and the fuel consumption of the vehicle also deteriorates.

  Therefore, the present invention does not necessarily interlock the automatic start of the engine and the ON of the compressor, thereby preventing a deterioration in the acceleration of the vehicle and a vehicle equipped with such a vehicle air conditioner. It is a first object to provide

  By the way, when the evaporator temperature reaches a predetermined temperature higher than the compressor ON set temperature in the normal intermittent operation after starting the engine that has been stopped due to the signal of the traffic light shifting to blue If the compressor is turned on at the same time, the start of the refrigeration cycle is relatively slower than the case where the compressor is turned on in conjunction with the start of the engine. The start is also relatively slow.

  Therefore, if the running time of the vehicle before stopping is short, the temperature of the evaporator at the time of stopping of the vehicle cannot be sufficiently lowered, and the temperature of the evaporator easily reaches a predetermined temperature while the vehicle is stopped. Therefore, there is a possibility that the problem that the engine idle stop time becomes relatively short may occur, and it is necessary to solve it appropriately.

  Therefore, the present invention provides a vehicle air conditioner capable of relatively extending the idle stop time of the engine even if the travel time before stopping is short, and a vehicle equipped with such a vehicle air conditioner. The purpose.

The vehicle air conditioner according to the present invention is mounted on a vehicle having an engine automatic start / stop function unit that can run by an engine and has an engine automatic start / stop function capable of automatically starting and stopping the engine. A compressor that is driven by the engine as a power source and compresses the refrigerant, a condenser that condenses the compressed refrigerant, a decompression expansion device that decompresses and expands the condensed refrigerant, and evaporates the decompressed and expanded refrigerant A refrigerating cycle constituted by appropriately connecting the evaporators to be connected, evaporator temperature detecting means for detecting the temperature of the evaporator, and control means for controlling the operating state of the compressor, the control means comprising: Determining whether or not the compressor needs to be driven based on the temperature of the evaporator detected by the evaporator temperature detecting means, and the engine is operated by the engine automatic start / stop function. If it is locked, not transmit a start request signal of the engine evaporator temperature of the evaporator detected by the temperature detection means is lower than the first compressor drive determination temperature to the engine automatic start stop function unit If the detected evaporator temperature is equal to or higher than the first compressor drive determination temperature, an engine start request signal is sent to the engine automatic start / stop function unit. When the engine is started by the engine automatic start / stop function regardless of the transmission of the engine start request signal, the evaporation detected by the evaporator temperature detecting means is transmitted. When the compressor temperature is lower than the first compressor drive determination temperature, the compressor is turned off, and the detected evaporator temperature is the same as the first compressor drive determination temperature or the first Turning ON the driving of the compressor is higher than the compressor drive determining temperature is characterized in (Claim 1).

Here, the compressor includes both a fixed capacity type compressor and a variable capacity type compressor. Further, the evaporator temperature detection means is, for example, an evaporator temperature sensor. Further, the control means is a control unit as a superordinate concept including, for example, both a vehicle side control unit and an air conditioning side control unit. Further, when the compressor is a fixed capacity type, the compressor drive is turned ON / OFF as a normal intermittent operation for preventing the evaporator from being frozen even if the compressor drive is ON.

As a result, it is not always necessary to link the automatic start of the engine that does not depend on the engine start request signal and the ON of the compressor, so the drive rate of the compressor at the time of vehicle acceleration immediately after the automatic engine start is reduced. By lowering, it is easy to prevent deterioration of the acceleration performance of the vehicle, and it is possible to reduce the fuel consumption of the vehicle.

The control means determines whether the vehicle is stopped or traveling based on an output signal from a vehicle traveling state detection means for detecting a vehicle traveling state. When the vehicle is determined to be traveling, the evaporator temperature When the evaporator temperature detected by the detection means is lower than the second compressor drive determination temperature, the compressor is turned off, and the detected evaporator temperature is the same as the second compressor drive determination temperature. If the temperature is higher than the second compressor drive determination temperature, the compressor is turned on, and the second compressor drive determination temperature is lower than the first compressor drive determination temperature, and The compressor is set higher than the compressor ON set temperature for turning on the compressor when the compressor is turned on / off to prevent the evaporator from freezing ( Claim 2 ). The vehicle running state detecting means is, for example, a vehicle speed detecting means or an accelerator opening / closing state detecting means.

  As a result, while the vehicle is running, the compressor is turned on when the second compressor drive determination temperature lower than the first compressor drive determination temperature is reached, so that the compressor drive is stopped. Even when the evaporator is cooled earlier and the vehicle frequently repeats running and stopping, such as during traffic jams, the compressor stop time is sufficient when idling is stopped. Can be secured.

Further, the control means determines the opening / closing state of the accelerator based on an output signal from the accelerator opening / closing state detecting means for detecting the opening / closing state of the accelerator, and a predetermined time after the engine is started by the engine automatic start / stop function. When it is determined that the accelerator is in an open state for a while, if the evaporator temperature detected by the evaporator temperature detecting means is lower than the second compressor drive determination temperature, The drive is turned off ( claim 3 ).

  Thus, it is determined that the vehicle is accelerating from the accelerator opening state, and the vehicle is accelerated by turning on the compressor drive when the evaporator temperature is lower than the second compressor drive determination temperature. It is possible to prevent the performance from being impaired and the fuel consumption of the vehicle from deteriorating.

Further, the control means determines whether the accelerator is closed or closed based on an output signal from the accelerator open / close state detection means, and the predetermined time elapses after the engine is started by the engine automatic start / stop function. When it is not determined that the accelerator is in the open state, the compressor is turned on after the predetermined time has elapsed ( claim 4 ).

  As a result, during a traffic jam, it is determined whether the vehicle is accelerating through the time required for acceleration of the vehicle. When it is determined that the vehicle is not accelerating, the compressor is turned on to reduce the engine load. In addition, since the compressor is turned on relatively early, it becomes possible to prepare for an engine idle stop early without deteriorating the fuel consumption of the vehicle.

Here, the evaporator includes a regenerator that can change the phase in a predetermined temperature range and can store or cool, and the first compressor drive determination temperature is the predetermined temperature of the regenerator. It is characterized in that it is set to be higher than the range ( claim 5 ).

  Thereby, since the 1st compressor drive determination temperature is set higher than the temperature range in which a cool storage agent changes a phase, while an evaporator rises in temperature to the 1st compressor drive determination dynamic temperature, a cool storage agent is used. The accumulated cold energy can be allowed to cool, and transmission of the engine start request signal can be delayed to ensure a sufficient compressor stop time.

On the other hand, the evaporator includes a regenerator that can change the phase in a predetermined temperature range and can store or cool, and the second compressor drive determination temperature is the predetermined value of the regenerator. It may be set to be lower than the upper limit temperature of the temperature range ( claim 6 ).

  Thereby, since the 2nd compressor drive determination temperature is set lower than the upper limit temperature of the temperature range in which a cool storage agent changes in phase, all the cold heat accumulated in the cool storage agent is allowed to cool while the vehicle is traveling. It becomes possible to start the temperature drop of the evaporator before, and the evaporator can be quickly cooled to prepare for idling of the engine.

Furthermore, the second compressor drive determination temperature may be set to be lower than a lower limit temperature of the predetermined temperature range of the cold storage agent ( Claim 7 ).

  As a result, the second compressor drive determination temperature is set lower than the lower limit temperature of the temperature range in which the cool storage agent changes phase. Therefore, before the cold energy accumulated in the cool storage agent is allowed to cool, the vehicle is traveling. Further, it is possible to further start the temperature decrease of the evaporator, and the evaporator can be quickly cooled to prepare for idling of the engine.

  However, this means that the second compressor drive determination temperature is lower than the upper limit temperature of the temperature range in which the cool storage agent changes in phase and higher than the lower limit temperature, that is, within the temperature range in which the cool storage agent changes in phase. It does not mean that it is not set, and even if the cool storage agent is set within the temperature range in which the phase changes with respect to the second compressor drive determination temperature, it is accumulated in the cool storage agent while the vehicle is running. It is possible to start the temperature of the evaporator before the cold heat is allowed to cool, and the evaporator can be quickly cooled to prepare for an engine idle stop.

Further, the control means sets the first compressor drive determination temperature and / or the second compressor drive determination temperature relatively lower as the heat load is larger ( Claim 8 ). .

  As a result, the first compressor drive determination temperature and / or the second compressor drive determination temperature is set relatively low as the heat load increases, so the drive rate of the compressor is increased when the heat load is large. It is possible to give priority to maintaining passenger comfort and lowering the driving rate of the compressor when the heat load is not large, giving priority to reducing the fuel consumption of the vehicle, and fine control according to the heat load is possible.

The thermal load is an overall air conditioning signal calculated at least from the outside air of the vehicle, the indoor air temperature of the vehicle, the air conditioning set temperature set by the vehicle occupant, and the amount of solar radiation. ( Claim 9 ).

  In this way, since the heat load is an air conditioning comprehensive signal, it becomes possible to control the drive of the compressor corresponding to the operation required capacity required for the refrigeration cycle, and fine air conditioning control that takes into account the requests from the passengers it can.

In contrast, the thermal load may be that it is the outside air temperature of the vehicle (claim 10). Thus, since the heat load is the outside air temperature of the vehicle, detailed air conditioning control can be performed without using complicated control.

The vehicle air conditioner according to the present invention is provided on the downstream side of the air flow with respect to the evaporator, and can be cooled by the air cooled by the evaporator, and the cold storage heat exchanger. A regenerative heat exchanger temperature detecting means for detecting temperature, wherein the control means detects the regenerative heat exchange detected by the regenerative heat exchanger temperature detecting means instead of the temperature of the evaporator detected by the evaporator temperature detecting means. The necessity of driving the compressor is determined based on the temperature of the compressor, and when the engine is stopped by the engine automatic start / stop function, the cold storage heat exchanger detected by the cold storage heat exchanger temperature detecting means When the temperature reaches the first compressor drive determination temperature, an engine start request signal is transmitted to the engine automatic start / stop function unit, and the engine is started by the engine automatic start / stop function. If it is, it is possible to hold the compressor on until the temperature of the cold storage heat exchanger temperature detected by the cold storage heat exchanger temperature detection means reaches the first compressor drive determination temperature. ( Claim 11 ).

The control means determines whether the temperature of the cold storage heat exchanger detected by the cold storage heat exchanger temperature detection means is the first compressor drive determination while the engine is stopped by the engine automatic start / stop function. If the temperature is lower than the temperature, the engine start request signal is not transmitted, and the detected temperature of the regenerative heat exchanger is the same as the first compressor drive determination temperature or higher than the first compressor drive determination temperature. And an engine start request signal to the engine automatic start / stop function unit, and the drive of the compressor is turned on, and the engine is not activated by the engine automatic start / stop function regardless of the transmission of the engine start request signal. When started, if the temperature of the cold storage heat exchanger detected by the cold storage heat exchanger temperature detection means is lower than the first compressor drive determination temperature, the drive of the compressor is turned off. The detected temperature of the cold storage heat exchanger is characterized by ON driving high and the compressor than the same whether the first compressor drive determination temperature and the first compressor drive determination temperature ( Claim 12 ).

  Thereby, it can also determine ON / OFF of the drive of a compressor using the temperature of the cool storage heat exchanger provided in the downstream of the evaporator instead of the temperature of an evaporator, and, thereby, a vehicle air conditioner The degree of design freedom can be increased.

Finally, a vehicle according to the present invention is characterized in that the vehicle air conditioner according to any one of claims 1 to 13 is mounted ( claim 13 ).

Thereby, since it was set as the vehicle provided with the vehicle air conditioner in any one of Claims 1-12 , automatic starting of an engine and ON of the drive of a compressor are not necessarily interlocked | linked, The drive rate of the compressor at the time of vehicle acceleration immediately after the automatic start is low, and it is possible to provide a vehicle that can prevent deterioration of the acceleration performance of the vehicle and reduce fuel consumption.

  As described above, according to the present invention, it is possible to prevent the automatic starting of the engine that does not depend on the engine start request signal and the ON of the compressor from being interlocked with each other as to the control means. The drive rate of the compressor at the time of vehicle acceleration immediately after the engine is automatically started decreases, and it becomes easy to prevent the deterioration of the acceleration performance of the vehicle, and the fuel consumption of the vehicle can be reduced.

In particular, according to the second aspect of the present invention, when the vehicle is running, the compressor is turned on when the second compressor drive determination temperature lower than the first compressor drive determination temperature is reached. Since the compressor can be driven relatively early than when the vehicle is stopped and the evaporator can be cooled early, the engine can be used even when the vehicle is frequently running / stopped during traffic jams. It becomes possible to relatively lengthen the stop time of the compressor at the time of idling stop.

In particular, according to the third aspect of the present invention, it is determined that the vehicle is accelerating from the accelerator opening state, and the compressor is at a stage where the evaporator temperature is lower than the second compressor drive determination temperature. By turning on the drive, it is possible to prevent the acceleration of the vehicle from being impaired and the fuel consumption of the vehicle from deteriorating.

In particular, according to the fourth aspect of the present invention, it is determined whether or not the vehicle is accelerating through the time required for acceleration of the vehicle in a traffic jam, and the compressor is turned on when it is determined that the vehicle is not accelerating. As a result, when the engine load is low, the drive of the compressor is turned on relatively early, so that it is possible to prepare for an idle stop of the engine early without deteriorating the fuel consumption of the vehicle.

In particular, according to the fifth aspect of the present invention, the first compressor drive determination temperature is set higher than the temperature range in which the regenerator changes phase, so that the evaporator has the first compressor drive determination dynamic temperature. Thus, it is possible to cool the cold stored in the regenerator while the temperature rises, delaying the transmission of the engine start request signal, and ensuring a sufficient compressor stop time.

In particular, according to the invention described in claim 6 , since the second compressor drive determination temperature is set lower than the upper limit temperature of the temperature range in which the cool storage agent changes phase, the cool storage agent is used while the vehicle is running. Before the accumulated cold heat is allowed to cool down, the temperature of the evaporator can be lowered, and the evaporator can be quickly cooled to prepare for an engine idle stop.

In particular, according to the invention described in claim 7 , since the second compressor drive determination temperature is set lower than the temperature range in which the cool storage agent changes phase, it is accumulated in the cool storage agent while the vehicle is running. It becomes even more possible to start the temperature of the evaporator before the cold heat is allowed to cool, and the evaporator can be quickly cooled to prepare for idling of the engine.

In particular, according to the eighth aspect of the invention, the first compressor drive determination temperature and / or the second compressor drive determination temperature is set relatively low as the heat load increases, so that the heat load is large. It is possible to give priority to maintaining passenger comfort by increasing the compressor driving rate, and lowering the operating rate of the compressor when the heat load is not high, giving priority to reducing vehicle fuel consumption. Fine-tuned control is possible.

In particular, according to the ninth aspect of the present invention, since the heat load is the air conditioning integrated signal, it becomes possible to perform the drive control of the compressor corresponding to the operation required capacity required for the refrigeration cycle, and the request from the passenger Detailed air conditioning control that takes into account

In particular, according to the ninth aspect of the invention, since the heat load is the outside air temperature of the vehicle, fine air conditioning control can be performed without using complicated control.

In particular, according to the invention described in claim 10 or claim 11 , the compressor drive is turned on / off using the temperature of the cold storage heat exchanger provided downstream of the evaporator instead of the temperature of the evaporator. Therefore, the degree of freedom in designing the vehicle air conditioner can be increased.

In particular, according to the twelfth aspect of the invention, the automatic engine start and the compressor drive ON are not necessarily linked, and the compressor drive rate during vehicle acceleration immediately after the engine is automatically started is Accordingly, it is possible to provide a vehicle in which the acceleration of the vehicle is prevented from being deteriorated and the fuel consumption is reduced.

FIG. 1 is an explanatory view showing a vehicle air conditioner and an engine using an evaporator having a cold storage agent in the present invention as a refrigeration cycle. FIG. 2 is a perspective view showing an example of the entire configuration of an evaporator provided with a regenerator used in the refrigeration cycle. 3 (a), (b), and (c) are explanatory views of a forming plate constituting the evaporator shown in FIG. 2, and FIG. 3 (a) and FIG. FIG. 3 (b) shows a substantially flat molding sandwiched between the molding plate shown in FIG. 3 (a) and the molding plate shown in FIG. 3 (c). The plate is shown. FIG. 4 is a flowchart showing the necessity of transmitting the engine start request signal and the flow of control of the compressor drive in Embodiment 1 of the present invention. FIG. 5 shows that, in the first embodiment, when the signal shifts to blue, ON of the compressor drive is not interlocked with the automatic engine start, and is suspended until the first compressor drive determination temperature T1 is reached. It is explanatory drawing which showed the aspect to do. FIG. 6 is a flowchart showing the flow of control of the compressor drive in the second embodiment of the present invention, and does not show the relationship with the opening and closing of the accelerator, and the second compressor drive determination temperature T2 is the temperature of the evaporator. When it is higher than this, a mode is shown in which the compressor is simply turned off. FIG. 7 is also a flowchart showing the flow of control of the compressor drive in the second embodiment, and even when the second compressor drive determination temperature T2 is higher than the evaporator temperature, the accelerator is opened. It shows a mode in which the compressor can be turned on earlier depending on the situation. FIG. 8 shows that in the second embodiment, when the signal shifts to blue, the control of the compressor drive is controlled by a second compressor drive determination temperature T2 lower than the first compressor drive determination temperature T1 of FIG. FIG. 5 is an explanatory diagram showing an aspect in which the ON state of the compressor is different based on the open / close state of the accelerator at a temperature lower than the second compressor drive determination temperature T2. FIG. 9 shows, as a modification of the first and second embodiments of the present invention, instead of the evaporator having the cold storage agent of FIG. 1, an evaporator having no cold storage agent and a cold storage heat exchanger having the cold storage agent. It is explanatory drawing which showed the structure used and also showed a cool storage heat exchanger temperature detection means.

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

  FIG. 1 shows an example of a vehicle air conditioner 1 according to the present invention. The vehicle air conditioner 1 shown in FIG. 1 includes an HVAC unit 2, a refrigeration cycle 22, and an air conditioner that controls an air conditioner. The air conditioner side control unit 29 and the vehicle side control unit 30 constitute a control means 35.

  The HVAC unit 2 is disposed closer to the cabin room than a fire board (not shown) that partitions the engine room and the cabin room of the vehicle. As shown in FIG. 3 is formed in an evaporator 5 as a cooling heat exchanger constituting a part of a refrigeration cycle 22 described later, for example, a heater as a heating heat exchanger using a cooling water of an engine 31 described later as a heat source. 6 is accommodated, and a blower 7 is disposed upstream of the air flow path 3 with respect to the evaporator 5.

  Further, as shown in FIG. 1, an intake device 8 is disposed further upstream than the blower 7, that is, on the most upstream side of the air flow path 3. The intake device 8 is configured such that the inside air or the outside air is introduced from the inside air introduction port 10 and / or the outside air introduction port 11 according to the position (opening degree) of the intake door 9 by the rotation of the blower 7. The intake door 9 is driven by an actuator (not shown), and the blower 7 is driven by a motor.

  In the case 4, as shown in FIG. 1, a cool air passage 12 that bypasses the heater 6 and cools the air cooled through the evaporator 5 to the downstream side of the air passage 3, and the heater A warm air flow path 13 that guides the air that has passed through 6 to the downstream side of the air flow path 3 is configured as a part of the air flow path 3. The ratio of the air passing through the cold air passage 12 and the air passing through the hot air passage 13 is adjusted by the opening degree of the air mix door 14 shown in FIG. And the air flowing from the hot air flow path 13 are appropriately mixed at the downstream side of the air mix door 14 and the heater 6 of the air flow path 3, and the differential air outlet 15, the vent outlet 16, the foot The air is blown out from the air outlet 17 to the vehicle interior space as appropriate. In the first embodiment, these air outlets 15, 16, and 17 are appropriately selected by rotating the air outlet mode switching doors 18, 19, and 20 disposed in the immediate vicinity of these air outlets. . Each door 14, 18, 19, 20 is driven by an actuator (not shown).

  In this embodiment, as shown in FIG. 1, an evaporator temperature detecting means 21 for detecting the evaporator temperature by measuring the surface temperature of the evaporator 5 is arranged on the surface of the evaporator 5. . However, in place of the evaporator temperature detecting means 21 arranged on the surface of the evaporator 5, although not shown, the outlet of the evaporator 5 is provided on the outlet side of the evaporator 5 in the downstream area of the air from the evaporator 5. You may make it arrange | position the evaporator temperature detection means 21 which detects evaporator temperature by measuring the air temperature of the side. The evaporator temperature detecting means 21 itself is a known one such as a thermostud or other temperature sensor, and the description of its configuration is omitted. The arrangement and the configuration of the evaporator temperature detecting means 21 with respect to the evaporator 5 are the same for the evaporator temperature detecting means 21 shown in FIG.

  As shown in FIG. 1, the refrigeration cycle 22 is configured by appropriately connecting a compressor 23, a condenser 24, a gas-liquid separator 25, a vacuum expansion device 26, and an evaporator 5 through a pipe 27. .

  The compressor 23 sucks and compresses the refrigerant and then discharges it. In this embodiment, the compressor 23 uses a fixed discharge type called a fixed displacement type, and the power of the engine 31 is transmitted to a V belt or the like. It is transmitted via the device 32. However, this compressor 23, such as a clutch type, can prevent the compression action even if the power of the engine 31 is transmitted through the transmission device 32. A state where the action is possible is referred to as compressor driving ON, and a state where the compressor 23 is not capable of compressing is referred to as compressor driving OFF.

  The high-temperature and high-pressure refrigerant discharged from the compressor 23 flows into the condenser 24 and is condensed by exchanging heat with the outside air blown by the cooling fan 28. The refrigerant condensed in the condenser 24 flows into the gas-liquid separator 25, where the refrigerant is gas-liquid separated, and excess refrigerant in the refrigeration cycle 22 is stored in the gas-liquid separator 25, and this gas-liquid separator. The liquid refrigerant sent from 25 to the decompression / expansion device 26 is decompressed by the decompression / expansion device 26 to be in a low-pressure gas-liquid two-phase state. The low-pressure refrigerant delivered from the decompression / expansion device 26 flows into the evaporator 5, absorbs heat from the air flowing through the air flow path 3, evaporates, and then returns to the compressor 23.

  As shown in FIGS. 2 and 3, an evaporator 5 having a cold storage function is used. The evaporator 5 is basically a stacked heat exchanger in which tubes 39 each having a pair of tanks 38 and 38 disposed on both sides in the longitudinal direction are stacked with corrugated fins 40 interposed therebetween, Tubes 39 ′ having side plates 41 and 42 are arranged at both ends in the stacking direction of the tubes 39.

  The tube 39 is formed with a refrigerant passage communicating with the tank 38 on one end side in the longitudinal direction of the tube 39 and the tank 38 on the other end side in the longitudinal direction. For example, FIG. Is formed by assembling a forming plate 39a shown in FIG. 3B, a forming plate 39b shown in FIG. 3B, and a forming plate 39c shown in FIG.

  The forming plate 39a and the forming plate 39c have a pair of bulging portions 38a, 38a for forming the tanks 38, 38 of the tube 39 on both sides in the longitudinal direction of the forming plates 39a, 39c. Two bulging portions 44 for forming a refrigerant passage for forming 39 refrigerant passages are formed in a wave shape. Both ends of the refrigerant passage forming bulging portion 44 are continuous with the tank forming bulging portion 38a. Each tank forming bulge portion 38 a is formed with a through hole 381 for communicating with the tank 38 of another adjacent tube 39.

  Further, the molding plate 39a and the molding plate 39c are provided between the two refrigerant passage forming bulging portions 44 and 44 and between the refrigerant passage forming bulging portion 44 and the side edges of the molding plate 39a and the molding plate 39c. A swell part 45 for forming a cold storage agent holding part is formed. The swell part 45 for forming the cold storage agent holding part and the swell part 44 for forming the refrigerant passage are clearly separated by a partition wall 46. Further, in this embodiment, the supply holes 451 for supplying the cold storage agent to both sides in the longitudinal direction of the cold storage agent holding portion forming bulging portion 45 located between the two refrigerant passage forming bulging portions 44, 44. Is formed.

  The molding plate 39b is interposed between the molding plate 39a and the molding plate 39c, and has through holes 38b, 38b for forming the tanks 38, 38 on both sides in the longitudinal direction of the molding plate 39b. A plurality of communication holes 47 are formed for connecting the cold storage agent holding portion forming bulging portion 45 of the forming plate 39a and the cold storage agent holding portion forming bulging portion 45 of the forming plate 39c. The forming plate 39b has through holes 452 at positions corresponding to the supply holes 451 of the forming plates 39a and 39c.

  With such a configuration, when the molding plate 39a and the molding plate 39c are assembled with the molding plate 39b interposed, the tube 39 has a configuration in which a cold storage agent holding portion is arranged separately from the refrigerant passage. The swelling part 45 for forming the regenerator holding part has a communication hole in the molding plate 39b between the bulging parts 44, 44 for forming the refrigerant passage and between the side edges of the molding plate 39a and the molding plate 39c. 47 and the supply hole 451.

  The side plate 41 is provided with inlets and outlets 43 and 43 for connection to an inlet / outlet pipe (not shown). The side plate 41 is assembled with the molding plate 39c with the molding plate 39b interposed therebetween. And the tubes 38 ′ and 39 ′ including the tank 38 ′, the refrigerant passage communicating between the tanks 38 ′, and the cold storage holding portion disposed in the vicinity of the refrigerant passage, respectively. . Further, in the side plate 41, supply holes 453 for supplying a cool storage agent are formed at positions corresponding to supply holes 451 formed in the forming plates 39a and 39c and through holes 452 formed in the forming plate 39b. Has been.

  However, a plurality of tubes 39 are appropriately stacked with the corrugated fins 40 interposed therebetween, and the tubes 39 ′ and 39 ′ are further stacked on both sides of the stacked layers with the corrugated fins 40 interposed therebetween and brazed, and then a predetermined temperature is reached. An evaporator 5 having a cold storage function is supplied by supplying a cold storage agent that can change the phase in the range and cool or discharge the cold storage agent from the supply hole 453 to the cold storage agent holding unit and sealing the supply hole 453 as appropriate. Is configured. In addition, the phase change temperature range T3 of a cool storage agent is the range of 5 to 6 degreeC, for example.

  The vehicle-side control unit 30 is a control device for performing overall control of the engine 31, and is configured to include an input / output device, a storage device, and a central processing unit (not shown). On the input side of the unit 30, vehicle speed detection means 51 such as a vehicle speed sensor for detecting the speed of the vehicle, accelerator open / close state detection means 52 for detecting the accelerator open / close state, various detection means (not shown), and the following air conditioner side control The unit 29 is electrically connected so that detection information from the detection means 51, 52, etc., a request signal from the air conditioner side control unit 29, and the like are appropriately input. An engine 31 and an air conditioner control unit 29 are electrically connected to the output side of the vehicle control unit 30.

  As a result, the vehicle-side control unit 30 receives detection information from various detection means, calculates the running state of the vehicle and the operating state of the engine 31 based on the detection information, and outputs an output signal to the air-conditioner-side control unit 29. Send as.

  The air-conditioner side control unit 29 is a control device for performing comprehensive control of the vehicle air-conditioning apparatus 1, and, like the vehicle-side control unit 30, has an input / output device, a storage device, and a central processing unit. Configured. On the input side of the air-conditioner side control unit 29, an air-conditioner console provided with various switches for setting the vehicle-side control unit 30, ON / OFF of the air conditioner, switching of the inside / outside air introduction mode, switching of the blown air mode, setting of the indoor temperature target, etc. 53, a solar radiation amount detecting means 54 such as a solar radiation sensor for detecting the solar radiation amount, an outside air temperature detecting means 55 such as an outside air temperature sensor for detecting the outside air temperature, an indoor temperature detecting means 56 for detecting the indoor temperature of the vehicle, and an evaporator temperature. The evaporator temperature detection means 21 such as a temperature sensor for detecting the temperature is electrically connected, detection information from various detection means such as the outside air temperature, the amount of solar radiation, the evaporator temperature, the set temperature of the air conditioner console unit 53, etc. The setting information, the operating state of the vehicle and the engine 31, and the like are input.

  The output side of the air conditioner side control unit 29 includes the compressor 23, the motor of the blower 7, the actuator (not shown) of the intake door 9, the actuator (not shown) of the air mix door 14, and the actuator (not shown) of the blow mode switching doors 18 to 20. Are also electrically connected to the vehicle-side control unit 30.

  Thereby, the air conditioner side control unit 29 calculates the air conditioning comprehensive signal based on the setting information from the air conditioner console unit 53, the detection information from the outside air temperature detecting means 55, the traveling or stopping condition of the vehicle, and the operating condition of the engine 31. The heat load obtained as the air conditioning comprehensive signal is output to the compressor 23, the motor of the blower 7, etc., and the drive of the compressor 23 is turned ON / OFF according to the heat load obtained as the air conditioning comprehensive signal, Alternatively, an operation request signal for the engine 31 is transmitted to the vehicle-side control unit 30.

  In addition, the air conditioner side control unit 29 intermittently connects the compressor 23 in order to prevent the evaporator 5 from being frozen in the state where the drive of the compressor 23 is basically turned on when the drive of the compressor 23 is turned on / off. The control to turn on / off is performed. That is, the ON / OFF control of the compressor 23 for preventing freezing of the evaporator 5 is performed by the temperature of the evaporator detected by the evaporator temperature detecting means 21 as shown by the characteristic lines in FIGS. Is turned off when the compressor stop temperature Teoff or lower, the drive of the compressor 23 is turned off. As a result, the temperature of the evaporator detected by the evaporator temperature detecting means 21 rises and becomes higher than the compressor stop temperature Teon. In such a case, it is assumed that there is no longer any risk of freezing of the evaporator 5, and the compressor 23 is turned on. The compressor drive temperature Teon is 2 ° C., for example, and the compressor stop temperature Teoff is 1 ° C., for example.

  Further, the air conditioner side control unit 29 controls the driving of the compressor 23 so that the temperature of the evaporator 5 detected by the evaporator temperature detecting means 21 becomes relatively high as temperature control of the evaporator. And switching to a cold storage mode for controlling the driving of the compressor 23 so that the temperature of the evaporator 5 detected by the evaporator temperature detecting means 21 is equal to or lower than the temperature controlled in the normal mode. is there.

  In the control means 35 provided with the air conditioner side control unit 29 and the vehicle side control unit 30, the driving of the compressor 23 is turned on to start (re-start) the engine 31 when the vehicle is stopped or traveled from the creep traveling state. Control of driving of the compressor 23 not to be interlocked will be described based on the flowchart of FIG. Note that creep travel refers to vehicle travel that occurs without the operator stepping on the accelerator pedal while the engine 31 is idling.

  Step 100 is entered from the main routine. In the next step 101, it is determined whether or not the vehicle is running (ie, when the vehicle is stopped or creeping). In step 102, whether or not the engine 31 is automatically stopped by the automatic start / stop function, that is, whether the battery power is insufficient or insufficient, the necessity of starting the engine 31 and starting the power generator, and the signal of the traffic light are It is determined whether or not the engine 31 is stopped because there is no need to move from red to blue and start the engine 31 to run the vehicle. If it is determined in step 101 that the vehicle is traveling, the process returns to step 101 to determine again whether or not the vehicle is traveling.

  If it is determined in step 102 that the engine 31 has not been automatically stopped by the automatic start / stop function, that is, it is determined that the engine 31 is in operation, the routine proceeds to step 103 where the evaporator temperature is driven by the compressor. It is determined whether or not the temperature is equal to or higher than the determination temperature T1, and as a result, when it is determined that the evaporator temperature is not equal to or higher than the compressor drive determination temperature T1, that is, the evaporator 5 is relatively low in temperature, step 104 is performed. Then, the control means 35 turns off the drive of the compressor 23 and then returns from step 105 to the main routine. On the other hand, when it is determined in step 103 that the evaporator temperature is equal to or higher than the compressor drive determination temperature T1, that is, the evaporator is relatively hot, the control means 35 proceeds to step 106. After the compressor 23 is turned on, the normal intermittent operation for preventing the evaporator from freezing with respect to the compressor 23 in step 107, that is, the temperature of the evaporator 5 is equal to or lower than the compressor drive temperature Teon and the compressor stop temperature. Control to turn on / off the drive of the compressor is performed so as to be within a range equal to or greater than Teoff, and then the process returns from step 105 to the main routine. The compressor drive determination temperature T1 is, for example, 10 ° C., the compressor drive temperature Teon is, for example, 2 ° C., the compressor stop temperature Teoff is, for example, 1 ° C., and these temperature values are the same in the following. .

  If it is determined in step 102 that the engine 31 is automatically stopped by the automatic start / stop function, that is, it is determined that the engine 31 is automatically stopped, the routine proceeds to step 108 where the temperature of the evaporator is driven by the compressor. If it is determined whether or not the temperature is equal to or higher than the determination temperature T1, and it is determined in step 108 that the temperature of the evaporator is not equal to or higher than the compressor drive determination temperature T1, that is, the evaporator 5 is relatively low in temperature, step Proceeding to 109, the control means 35 returns to the main routine from step 105 without transmitting a start request signal for the engine 31. On the other hand, when it is determined in step 108 that the evaporator temperature is equal to or higher than the compressor drive determination temperature T1, that is, the evaporator is relatively hot, the control means 35 proceeds to step 110. An engine start request signal is transmitted. Further, in step 111, the control means 35 turns on the driving of the compressor 23. Then, in step 112, the compressor 23 performs normal intermittent operation for preventing the evaporator from freezing, that is, evaporation. Control is performed to turn on / off the compressor so that the temperature of the compressor 5 falls within the range of the compressor drive temperature Teon or lower and the compressor stop temperature Teoff or higher. Thereafter, the routine returns from step 105 to the main routine.

  As an example of the first embodiment in which the control by the control means 35 shown in the flowchart of FIG. 4 can be performed, the engine when the signal of the traffic light shifts to blue again from the stage of transition to red. The change in the operation of the vehicle / device such as the situation 31, the situation of the vehicle, and the driving of the compressor 23 and the change in the temperature of the evaporator 5 will be described using FIG. 5 in comparison with the conventional example.

  Before the signal of the traffic light changes to red (the signal is blue), the engine 31 is in operation (operation 1), the vehicle is in operation (travel 1), and the compressor 23 is driven. On the other hand, the compressor 23 operates in a normal intermittent operation so that the temperature of the evaporator 5 changes in the range of the compressor driving temperature Teon or lower and the compressor stop temperature Teoff or higher. Therefore, the conventional example and the first embodiment are the same.

  Then, when the signal of the traffic light shifts to red, the vehicle stops (stop 1), the engine 31 stops (stop 1), the battery voltage is insufficient, the air conditioning set temperature by the occupant and the indoor air temperature When there is no great deviation, the compressor 23 is also turned off (OFF 1) in conjunction with the stop (stop 1) of the engine 31, and the operation of the refrigeration cycle 22 is also turned off. The conventional example and Example 1 are the same also in the point which raises.

  Subsequently, when the signal of the traffic light changes from red to blue, in the conventional example, the engine 31 is restarted by the automatic start / stop function (operation 2) because the vehicle needs to travel, and the vehicle travels ( Since the running 2) is started and the temperature of the evaporator 5 is higher than the temperature controlled by the normal intermittent operation (temperature range of Teon and Teoff), the compressor 23 restarts the engine 31 (operation 2). In conjunction with this, the drive is turned on (ON2), the refrigeration cycle 22 is operated, and the temperature of the evaporator 5 is lowered.

  Here, in the first embodiment, when the traffic light signal changes from red to blue, the engine 31 is restarted (running 2) by the automatic start / stop function, and the vehicle starts running (running 2) while being compressed. The machine 23 is not linked to the restart of the engine 31 (operation 2), and the compressor drive is turned off (OFF1) until the temperature of the evaporator 5 continues to rise and reaches the compressor drive determination temperature T1 or higher. When the temperature of the evaporator 5 becomes equal to or higher than the compressor drive determination temperature T1, the drive of the compressor is turned on (ON2), the operation of the refrigeration cycle 22 is also turned on, and the temperature of the evaporator 5 is It is made to fall from compressor drive judgment temperature T1.

  By controlling the drive of the compressor 23 after the traffic light signal has shifted to blue in this way, the acceleration time from when the traffic light signal shifts to blue and the engine 31 is started until the acceleration of the vehicle is completed. In the range of (for example, 10 seconds), it is avoided that the compressor 23 is turned on, so that it is possible to prevent the acceleration performance of the vehicle from deteriorating from the stop state or the creep travel to the end of acceleration. As a result, the fuel consumption of the vehicle is also improved.

  In the control means 35 including the air conditioner side control unit 29 and the vehicle side control unit 30, when the vehicle is stopped or traveled from the creep travel state, the compressor 23 is not turned on in conjunction with the restart of the engine 31. The control of driving of the compressor 23 when the vehicle is stopped or the creeping running state and the running state are repeated will be described based on the flowcharts of FIGS. 6 and 7.

  In FIG. 6, when the control unit 35 turns on the driving of the compressor 23 based on the temperature of the evaporator 5, two compressor driving determinations of the compressor driving determination temperature T <b> 1 and the new compressor driving determination temperature T <b> 2 are performed. The case where the temperature reference is used and is not related to the opening and closing of the accelerator will be described. The compressor drive determination temperature T2 is a value lower than the compressor drive determination temperature T1, for example, 8 ° C. However, the compressor drive determination temperature T1 is, for example, 10 ° C. as described above, and is higher than the upper limit temperature of the cool storage agent temperature range T3 (for example, a range of 5 ° C. to 6 ° C.) of the evaporator 5. However, the compressor drive determination temperature T2 can be set to a value lower than the lower limit temperature of the temperature range T3 of the regenerator of the evaporator 5, for example, 4 ° C. Furthermore, when the temperature range T3 of the regenerator of the evaporator 5 is a range wider than the range of 5 ° C to 6 ° C, for example, a range of 1 ° C to 6 ° C, the compressor drive determination temperature T2 is not shown. The value may be lower than the upper limit temperature of the temperature range T3 of the cool storage agent of the evaporator 5, and may be within the range of the temperature range T3 of the cool storage agent of the evaporator 5.

  Step 200 is entered from the main routine. In step 201, the driver operates the pedal when the signal of the traffic light changes to blue. Therefore, as shown in step 202, the engine 31 is automatically started by the automatic start / stop function. When the engine 31 is started, the routine proceeds to step 203 where it is determined whether or not the vehicle is traveling (stopping the vehicle or creeping).

  If it is determined in step 203 that the vehicle is not traveling, that is, the vehicle is stopped or creeping, the routine proceeds to step 204 where the control means 35 sets the compressor drive determination temperature T1. The process proceeds to step 205, where it is determined whether or not the evaporator temperature is equal to or higher than the compressor drive determination temperature T1. When it is determined in step 205 that the temperature of the evaporator is not equal to or higher than the compressor drive determination temperature T1, that is, it is determined that the evaporator 5 is relatively low in temperature, the process proceeds to step 206 and the control means 35 performs the compressor 23. After turning OFF the drive, the process returns from step 207 to the main routine. On the other hand, if it is determined in step 205 that the evaporator temperature is equal to or higher than the compressor drive determination temperature T1, that is, it is determined that the evaporator is relatively hot, the control means 35 proceeds to step 208. After the compressor 23 is turned on, the normal intermittent operation for preventing the evaporator from freezing with respect to the compressor 23 in step 209, that is, the temperature of the evaporator 5 is equal to or lower than the compressor drive temperature Teon and the compressor stop temperature Teoff. Control to turn on / off the compressor is performed so as to be within the above range, and then the process returns from step 207 to the main routine.

  On the other hand, if it is determined in step 203 that the vehicle is traveling, the process proceeds to step 210 where the control means 35 sets the temperature of the compressor drive determination temperature T2 and then proceeds to step 211 where the evaporator It is determined whether or not the temperature is equal to or higher than the compressor drive determination temperature T2.

  If it is determined in step 211 that the temperature of the evaporator is not equal to or higher than the compressor drive determination temperature T2, that is, it is determined that the evaporator 5 has a relatively low temperature, the process proceeds to step 212 and the control means 35 performs the compressor 23. After the driving of is turned off, the process returns from step 207 to the main routine. On the other hand, if it is determined in step 211 that the evaporator temperature is equal to or higher than the compressor drive determination temperature T2, that is, the evaporator is relatively hot, the control means 35 proceeds to step 213. After the compressor 23 is turned on, the normal intermittent operation for preventing the evaporator from freezing with respect to the compressor 23 in step 214, that is, the temperature of the evaporator 5 is equal to or lower than the compressor drive temperature Teon and the compressor stop temperature Teoff. Control to turn on / off the compressor is performed so as to be within the above range, and then the process returns from step 207 to the main routine.

  In FIG. 7, when the control unit 35 turns on the driving of the compressor 23 based on the temperature of the evaporator 5, two determination temperature standards of the compressor driving determination temperature T <b> 1 and the compressor driving determination temperature T <b> 2 are used. In addition, a description will be given of a case where the compressor driving is turned on even when the temperature of the evaporator 5 does not reach the compressor driving determination temperature T2 in relation to the opening and closing of the accelerator.

  Step 300 is entered from the main routine, and when the traffic light turns blue in the next step 301, the driver operates the pedal. Therefore, as shown in step 302, the engine 31 is automatically started by the automatic start / stop function. . When the engine 31 is started, the routine proceeds to step 303, where it is determined whether the vehicle is traveling (whether the vehicle is stopped or creeping).

  If it is determined in step 303 that the vehicle is not traveling, that is, the vehicle is stopped or creeping, the control means 35 proceeds to step 304 and the control means 35 sets the compressor drive determination temperature T1. The process proceeds to step 305, where it is determined whether the evaporator temperature is equal to or higher than the compressor drive determination temperature T1. If it is determined in step 305 that the evaporator temperature is not equal to or higher than the compressor drive determination temperature T1, that is, it is determined that the evaporator 5 is relatively low in temperature, the process proceeds to step 306 where the control means 35 performs the compressor 23. After turning OFF the driving of step 307, the process returns to the main routine. On the other hand, when it is determined in step 305 that the evaporator temperature is equal to or higher than the compressor drive determination temperature T1, that is, the evaporator is relatively hot, the control means 35 proceeds to step 308. After the compressor 23 is turned on, the normal intermittent operation for preventing the evaporator from freezing with respect to the compressor 23 in step 309, that is, the temperature of the evaporator 5 is equal to or lower than the compressor drive temperature Teon and the compressor stop temperature Teoff. Control to turn on / off the compressor is performed so as to be within the above range, and then the process returns from step 307 to the main routine.

  On the other hand, if it is determined in step 303 that the vehicle is traveling, the process proceeds to step 310, where the control unit 35 sets the temperature of the compressor drive determination temperature T2, and then proceeds to step 311 and proceeds to the evaporator. It is determined whether or not the temperature is equal to or higher than the compressor drive determination temperature T2.

  If it is determined in step 311 that the evaporator temperature is equal to or higher than the compressor drive determination temperature T2, that is, it is determined that the evaporator is relatively hot, the process proceeds to step 312 and the control unit 35 After the drive is turned on, in step 313, the compressor 23 is operated in a normal intermittent operation for preventing the evaporator from freezing, that is, the temperature of the evaporator 5 is in the range of the compressor drive temperature Teon or lower and the compressor stop temperature Teoff or higher. Control is performed to turn on / off the drive of the compressor so as to be within the range, and then the process returns from step 307 to the main routine.

  If it is determined in step 311 that the evaporator temperature is not equal to or higher than the compressor drive determination temperature T2, that is, it is determined that the evaporator is relatively low in temperature, the routine proceeds to step 314, where the accelerator open / close state detection means 52 Based on the detection information, the opening / closing state of the accelerator is determined during a predetermined time t after the signal of the traffic light shifts to blue and the engine 31 is automatically started. The length of the predetermined time t is set in advance as an acceleration time during which the acceleration of the vehicle will be completed after the engine 31 is restarted, for example, 10 seconds. Thus, if the accelerator is in an open state, that is, it is determined that the accelerator is open (when it is detected that the accelerator is open) during a predetermined time t after the engine 31 is restarted, the routine proceeds to step 315. The control means 35 does not turn on the compressor immediately after the elapse of the predetermined time t, and turns on after the evaporator temperature reaches the compressor drive determination temperature T2 (α), and the compressor 23 is turned on in step 313. Normal intermittent operation for preventing freezing of the evaporator, that is, the compressor driving is turned ON / OFF so that the temperature of the evaporator 5 is within the compressor driving temperature Teon and below the compressor stop temperature Teoff. Control is performed, and then the process returns from step 307 to the main routine.

  If it is determined in step 314 that the accelerator is not in an open state for a predetermined time t after the traffic signal has turned blue, that is, it is determined that the accelerator is closed (accelerator open is not detected). If the predetermined time t has elapsed, the control means 35 turns on the compressor drive even if the evaporator temperature is not equal to or higher than the compressor drive determination temperature T2 (step 317). β), the normal intermittent operation for preventing the evaporator from freezing with respect to the compressor 23 in step 316, that is, the temperature of the evaporator 5 is kept within the compressor driving temperature Teon or lower and the compressor stopping temperature Teoff or higher. Then, the control for turning on / off the driving of the compressor is performed, and then the process returns from step 307 to the main routine.

  As an example of the second embodiment that enables the control by the control means 35 shown in the flowcharts of FIGS. 6 and 7 as described above, the traffic light shifts to blue, the next traffic light shifts to red, Further, with reference to FIG. 8, changes in the operation of the vehicle / device such as the state of the engine 31, the state of the vehicle, the driving of the compressor 23, and the change in the temperature of the evaporator 5 when the next traffic light transitions to blue are performed. This will be described in comparison with Example 1.

  Before the signal of the traffic light changes to red (the signal is blue), the engine 31 is in operation (operation 1), the vehicle is in operation (travel 1), and the compressor 23 is driven. On the other hand, the compressor 23 operates in a normal intermittent operation so that the temperature of the evaporator 5 changes in the range of the compressor driving temperature Teon or lower and the compressor stop temperature Teoff or higher. In this respect, Example 1 and Example 2 are the same.

  Then, when the signal of the traffic light shifts to red, the vehicle stops (stop 1), the engine 31 stops (stop 1), the battery voltage is insufficient, the air conditioning set temperature by the occupant and the indoor air temperature If there is no significant deviation, the compressor 23 is also turned off (OFF 1) in conjunction with the engine 31, and the operation of the refrigeration cycle 22 is also turned off, and the temperature of the evaporator 5 rises accordingly. Example 1 and Example 2 are the same.

  Subsequently, when the signal of the traffic light shifts to blue, the engine 31 operates (operation 2) and the vehicle travels (travel 2), which is the same as in the first and second embodiments. In the first embodiment, the compressor driving is turned on (ON2) after the compressor driving judgment temperature T1 is reached or higher in the first embodiment, whereas in the second embodiment, it is lower than the compressor driving judgment temperature T1. When the compressor drive determination temperature T2 is reached, the compressor is turned on (ON2). For this reason, when Example 1 is simply used, as indicated by a broken line, when the signal of the next traffic light shifts to red and the vehicle starts to stop (stop 2), the temperature of the evaporator May not reach the range below the compressor drive temperature Teon at which the compressor operates intermittently or below the compressor stop temperature Teoff, but in the second embodiment, the signal of the next traffic light changes to red and the vehicle Before the stop (stop 2), the temperature of the evaporator can reach the range below the compressor drive temperature Teon at which the compressor operates intermittently and above the compressor stop temperature Teoff. Along with this, as in the case where the signal of the traffic light shifts to blue and the vehicle starts running (travel 2), the signal of the next traffic light shifts to red and the vehicle stops (stop 2). Even when the time from when the vehicle is stopped or creeping to when the vehicle stops again after traveling is relatively short, the idle stop time during which the operation of the engine 31 stops (stop 2) is relatively It is possible to make it longer.

  In the second embodiment, the vehicle stops traveling for a relatively long time (stop 2), the engine 31 stops (stop 2), the compressor 23 also stops (OFF2), and the operation of the refrigeration cycle stops. When the temperature of the evaporator 5 rises, the drive of the compressor 23 is turned ON (ON3) when the temperature of the evaporator 5 becomes equal to or higher than the compressor drive determination temperature T1, and the engine is also operated accordingly. (Operation 3) is started.

  Further, in the second embodiment, for example, after the next traffic light signal shifts to red and the vehicle stops (stop 2), the traffic light signal shifts to blue and the vehicle travels (run 3). It is conceivable that the temperature of the compressor does not reach a range below the compressor drive temperature Teon at which the compressor intermittently operates and above the compressor stop temperature Teoff. In this case, a predetermined time t after the engine 31 is restarted. Is elapsed, whether or not the accelerator is in an open state controls ON (ON4) of the compressor 23 to be driven. That is, even when the signal of the traffic light shifts to blue and the engine operates (operation 3) and the vehicle travels (travel 3), the compressor 23 is turned off (OFF 3), and the predetermined time t has elapsed. If it is detected that the accelerator is in the open state in the meantime, the compressor 23 is held on (ON4: α in FIG. 8) until the compressor drive determination temperature T2 is reached or higher, while the predetermined time t elapses. If it is not detected that the accelerator is not opened in the meantime, the compressor 23 is turned on (β in FIG. 8) when the predetermined time t has elapsed even if it is not equal to or higher than the compressor drive determination temperature T2.

  This prevents the compressor 23 from being turned on in the acceleration time range (for example, 10 seconds) in which the vehicle is accelerated after the traffic light signal changes to blue. It is possible to prevent the acceleration performance of the vehicle from deteriorating until the acceleration is finished, to improve the fuel consumption of the vehicle, and to quickly evaporate the evaporator 5 when the accelerator 31 is not opened and the load on the engine 31 is low. The temperature of the engine can be lowered, and the engine can be prepared for the next idle stop of the engine.

  In FIG. 9, the modification of the vehicle air conditioner 1 which concerns on this invention is shown. Hereinafter, another example of the vehicle air conditioner 1 will be described with reference to FIG. However, the same components as those of the vehicle air conditioner 1 shown as the first and second embodiments are denoted by the same reference numerals, the description thereof is omitted, and the same control as the first and second embodiments is also performed. The description is basically omitted.

  In this modification, the evaporator 5 is not provided with a cool storage agent, and instead, the cool storage heat exchanger 57 is disposed on the downstream side of the evaporator 5 in the air flow path 3. Since the evaporator 5 and the cold storage heat exchanger 57 are arranged in this way, the cold storage heat exchanger 57 can be cooled by the air that has passed through the evaporator 5 and is cooled. Further, a cold storage heat exchanger temperature detecting means 58 for detecting the cold storage heat exchanger temperature by measuring the surface temperature of the cold storage heat exchanger 57 is disposed on the surface of the cold storage heat exchanger 57. The input side of the air-conditioner side control unit 29 is electrically connected to the cold storage heat exchanger temperature detection means 58, and the temperature of the cold storage heat exchanger is detected from the cold storage heat exchanger temperature detection means 58 as detection information. Input to the control unit 29. In addition, since the cool storage heat exchanger 57 itself is a well-known thing, description of the structure is abbreviate | omitted.

  As a result, in the flowcharts of FIGS. 4, 6, and 7, instead of determining whether the evaporator temperature is equal to or higher than the compressor drive determination temperature T1 or higher than the compressor drive determination temperature T2, cold storage heat exchange is performed. It is determined whether the temperature of the compressor 57 is equal to or higher than the compressor drive determination temperature T1, or whether it is equal to or higher than the compressor drive determination temperature T2. Further, the temperature of the cold storage heat exchanger 57 is equal to or lower than the compressor drive temperature Teon and the compressor stop temperature Teoff. By performing the control to turn on / off the driving of the compressor so as to be within the above range, the same effect as that in the case of using the evaporator 5 provided with the cold storage agent can be obtained.

As described above, in Example 1, Example 2 and the modified examples of Examples 1 and 2 shown as the embodiments of the present invention, the compressor drive determination temperature T1 and the compressor drive determination temperature T2 are set as follows. Although described as a preset temperature, the compressor drive determination temperature T1 and the compressor drive determination temperature T2 may be varied according to the magnitude of the thermal load. For example, the compressor drive determination temperature T1 is set based on Equation 1 below, and the compressor drive determination temperature T2 is set based on Equation 2 below. In this way, by setting T1 and T2 lower as the outside air temperature is higher, deterioration of passenger comfort can be prevented. In addition, you may use the air conditioning comprehensive signal obtained by the calculation instead of the outside air temperature in Formula 1 and Formula 2. Detailed air conditioning control that takes into account not only the outside air temperature but also requests from passengers can be performed.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 HVAC unit 5 Evaporator 6 Heater 21 Evaporator temperature detection means 22 Refrigerating cycle 23 Compressor 29 Air conditioner side control unit 30 Vehicle side control unit 31 Engine 32 Transmission device 35 Control means 51 Vehicle speed detection means 52 Accelerator Opening / closing state detection means 53 Air conditioner console section 54 Solar radiation amount detection means 55 Outside air temperature detection means 56 Indoor temperature detection means 57 Cold storage heat exchanger 58 Cold storage heat exchanger temperature detection means

Claims (13)

The vehicle is mounted on a vehicle having an engine automatic start / stop function unit having an engine automatic start / stop function capable of traveling by an engine and capable of automatically starting and stopping the engine,
A compressor that drives with the engine as a power source and compresses the refrigerant, a condenser that condenses the compressed refrigerant, a decompression and expansion device that decompresses and expands the condensed refrigerant, and an evaporator that evaporates the decompressed and expanded refrigerant as appropriate A refrigeration cycle configured by joining pipes;
Evaporator temperature detecting means for detecting the temperature of the evaporator;
Control means for controlling the operating state of the compressor,
The control means includes
Determining the necessity of driving the compressor based on the temperature of the evaporator detected by the evaporator temperature detecting means;
When the engine is stopped by the engine automatic start / stop function,
If the evaporator temperature detected by the evaporator temperature detecting means is lower than the first compressor drive determination temperature, an engine start request signal is not transmitted to the engine automatic start / stop function unit, and the detected evaporator When the temperature of the engine is equal to or higher than the first compressor drive determination temperature, an engine start request signal is transmitted to the engine automatic start / stop function unit, and the compression Turn on the machine,
When the engine is started by the engine automatic start / stop function regardless of the transmission of the engine start request signal ,
When the evaporator temperature detected by the evaporator temperature detecting means is lower than the first compressor drive determination temperature, the compressor is turned off, and the detected evaporator temperature is the first compressor. The vehicle air conditioner is characterized in that the compressor is turned on when the drive determination temperature is equal to or higher than the first compressor drive determination temperature . The control means includes
Determining whether the vehicle is stopped or traveling based on an output signal from a vehicle traveling state detection means for detecting a vehicle traveling state;
When it is determined that the vehicle is running,
When the evaporator temperature detected by the evaporator temperature detection means is lower than the second compressor drive determination temperature, the compressor is turned off, and the detected evaporator temperature is the second compressor drive. When the temperature is the same as the determination temperature or higher than the second compressor drive determination temperature, the compressor is turned on,
The second compressor drive determination temperature is lower than the first compressor drive determination temperature, and the compressor is driven when the compressor is turned on / off to prevent the evaporator from freezing. The vehicle air conditioner according to claim 1 , wherein the vehicle air conditioner is set to be higher than a compressor ON set temperature for turning on the compressor. The control means includes
Based on the output signal from the accelerator opening / closing state detecting means for detecting the opening / closing state of the accelerator, the opening / closing state of the accelerator is determined,
When it is determined that the accelerator is in an open state while a predetermined time has elapsed since the engine was started by the engine automatic start / stop function,
The vehicle air conditioner according to claim 2 , wherein when the temperature of the evaporator detected by the evaporator temperature detecting means is lower than the second compressor drive determination temperature, the drive of the compressor is turned off. . The control means includes
Based on the output signal from the accelerator open / close state detection means, determine the closed state of the accelerator,
When the predetermined time has elapsed since the engine was started by the engine automatic start / stop function, when the accelerator is not determined to be open,
The vehicle air conditioner according to claim 2 or 3 , wherein the compressor is turned on after the predetermined time has elapsed. The evaporator is
A cold storage agent that can change the phase in a predetermined temperature range and store or cool it,
5. The vehicle air conditioning according to claim 1, wherein the first compressor drive determination temperature is set to be higher than the predetermined temperature range of the cool storage agent. apparatus. The evaporator is
A cold storage agent that can change the phase in a predetermined temperature range and store or cool it,
The second compressor drive determination temperature, according to any one of the preceding claims 2, wherein the set to be lower than the upper limit temperature of the predetermined temperature range of the refrigerant 13A Vehicle air conditioner. The said 2nd compressor drive determination temperature was set so that it might become lower than the minimum temperature of the said predetermined temperature range of the said cool storage agent, The Claim 2 characterized by the above-mentioned. Vehicle air conditioner. The control means includes
According to claims 1, characterized in that to set the higher thermal load is large first compressor drive determination temperature and / or the second compressor driven judgment temperature relatively low to claim 7 Vehicle air conditioner. The heat load is
And outside air of the vehicle, and the indoor air temperature of the vehicle, and the air conditioning set temperature set by the occupant of the vehicle, to claim 8, characterized in that the air conditioning total signal at least calculated from the amount of solar radiation, The vehicle air conditioner described. The heat load is
The vehicle air conditioner according to claim 8 , wherein the temperature is an outside air temperature of the vehicle. A regenerative heat exchanger that is provided downstream of the evaporator and is cooled by air cooled by the evaporator;
A cold storage heat exchanger temperature detecting means for detecting the temperature of the cold storage heat exchanger,
The control means includes
Determining whether or not the compressor needs to be driven based on the temperature of the cold storage heat exchanger detected by the cold storage heat exchanger temperature detection means instead of the temperature of the evaporator detected by the evaporator temperature detection means;
When the engine is stopped by the engine automatic start / stop function, when the temperature of the cold storage heat exchanger detected by the cold storage heat exchanger temperature detection means reaches the first compressor drive determination temperature, the engine automatic Sending the engine start request signal to the start / stop function unit,
When the engine is started by the engine automatic start / stop function, the compression until the temperature of the cold storage heat exchanger temperature detected by the cold storage heat exchanger temperature detection means reaches the first compressor drive determination temperature. The vehicle air conditioner according to any one of claims 1 to 10, wherein the drive of the machine can be held on. The control means includes
While the engine is stopped by the engine automatic start / stop function,
If the temperature of the cold storage heat exchanger detected by the cold storage heat exchanger temperature detection means is lower than the first compressor drive determination temperature, the engine start request signal is not transmitted, and the detected cold storage heat exchanger When the temperature is equal to or higher than the first compressor drive determination temperature, an engine start request signal is transmitted to the engine automatic start / stop function unit, and the compressor Turn on the drive,
When the engine is started by the engine automatic start / stop function regardless of the transmission of the engine start request signal,
When the temperature of the cold storage heat exchanger detected by the cold storage heat exchanger temperature detection means is lower than the first compressor drive determination temperature, the compressor is turned off, and the detected temperature of the cold storage heat exchanger is The vehicle air conditioner according to claim 11 , wherein the compressor is turned on when the temperature is equal to or higher than the first compressor drive determination temperature. A vehicle on which the vehicle air conditioner according to any one of claims 1 to 12 is mounted.

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