JP2009046113A - On-vehicle air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve efficiency of an engine and efficiency of air conditioning, and to effectively utilize electric power generated by an electric machine along with travelling. <P>SOLUTION: An on-vehicle air conditioning system comprises: the electric machine mechanically connected with driving wheels 65 and connected with a battery 84; a refrigerating system 11 equipped with a compressor 12, a condenser 13, and an evaporator 15; a cooling unit 40 storing cold generated by operating the refrigerating system 11 in a phase-change thermal storage medium, and transmitting it to air circulating in an air circulation system 20; and a cold storage processing means supplying electric power generated by the electric machine along with travelling of a vehicle to the refrigerating system 11 to drive the compressor 12. All of electricity generated along with the travelling is effectively utilized for operating the refrigerating system 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an in-vehicle air conditioning system.

Conventionally, in a vehicle, when an air conditioner is installed and the outside air temperature is high, the engine torque, that is, the engine torque is transmitted to the compressor, the air conditioner is operated, the vehicle interior is air-conditioned, and the predetermined temperature is maintained. (For example, refer to Patent Document 1).
JP-A-6-270645

  However, in the conventional vehicle, for example, when the vehicle is traveled by commuting, attending school or the like, the travel distance is generally about 5 to 15 km (one way), and the travel time is 20 to one way. Often 30 minutes, this is repeated from Monday to Friday. Also, in commuting hours, school hours, etc., there is a high possibility that traffic congestion will occur, and it is necessary for air conditioning if the vehicle is run while rotating the engine at a rotation speed near the idling rotation speed under traffic congestion. The time during which the control for increasing the idling rotational speed is performed so that a high rotational speed can be obtained becomes longer. Therefore, the engine efficiency and the air conditioning efficiency become extremely low.

  Further, in a hybrid vehicle, when braking the vehicle, electric power can be regenerated by a drive motor as an electric machine. Therefore, the regenerated electric power can be used for air conditioning. The electric power is lost while the electric power is supplied and charged, or the charged electric power is discharged and supplied to the air conditioner, and the efficiency of the air conditioning is lowered.

  The present invention solves the problems of the conventional vehicle, can increase the efficiency of the engine and the efficiency of the air conditioning, and effectively uses the electric power generated by the electric machine during traveling for the air conditioning. An object is to provide an in-vehicle air conditioning system capable of performing the above.

  Therefore, in the in-vehicle air conditioning system of the present invention, an electric machine that is mechanically connected to a drive wheel and connected to a battery, a refrigeration system including a compressor, a condenser, and an evaporator, and the operation of the refrigeration system A cooling unit that stores the cold heat generated by the heat storage medium that changes phase and transmits it to the air that is circulated through the air circulation system, and the electric power generated by the electric machine as the vehicle travels Is stored in the refrigeration system, and cold storage means for driving the compressor.

  According to the present invention, in an in-vehicle air conditioning system, an electric machine that is mechanically coupled to drive wheels and connected to a battery, a refrigeration system that includes a compressor, a condenser, and an evaporator, and the refrigeration system is operated. A cooling unit that stores the cold heat generated by the heat storage medium that changes phase and transmits it to the air that is circulated through the air circulation system, and the electric power generated by the electric machine as the vehicle travels Is stored in the refrigeration system, and cold storage means for driving the compressor.

  In this case, since the electric power generated by the electric machine as the vehicle travels is supplied to the refrigeration system and the compressor is driven, all of the generated electric power is supplied to the refrigeration system. Can be used effectively for driving. Therefore, the load applied to the engine can be reduced, and the engine efficiency and the air conditioning efficiency can be increased.

  Moreover, since the generated electric power can be used to operate the refrigeration system without going through the battery, it is possible to suppress the loss of electric power due to charging and discharging. Therefore, the efficiency of air conditioning can be further increased.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this case, an in-vehicle air conditioning system for air conditioning the vehicle interior mounted on a hybrid vehicle as a vehicle will be described.

  1 is a conceptual diagram of a hybrid vehicle according to a first embodiment of the present invention, FIG. 2 is a conceptual diagram of an in-vehicle air conditioning system according to the first embodiment of the present invention, and FIG. 3 is a first embodiment of the present invention. It is an enlarged view of the cooling unit in the form.

  In the figure, reference numeral 10 denotes an air conditioner mounted on a hybrid vehicle. The air conditioner 10 takes in air in the compression refrigeration system 11 and the passenger compartment, cools it using the refrigeration system 11, and then And an air circulation system 20 for discharging the vehicle interior.

  The refrigeration system 11 includes a compressor (C) 12 that compresses a refrigerant, a condenser 13 that cools and condenses the compressed refrigerant formed by a heat conductive material, a throttle 14 that squeezes the refrigerant, and heat conduction. It has an evaporator 15 that is made of a material and expands and evaporates the refrigerant that has passed through the throttle 14. A condenser fan f1 as a first fan is disposed adjacent to the condenser 13, and the condenser fan f1 is operated to suck air in front of the condenser 13 (left side in FIG. 1). Then, the condenser 13 can be cooled by sending it to the condenser 13. In addition, as a heat conductive material which forms the said condenser 13 and the evaporator 15, stainless steel, aluminum, copper, etc. are used.

  The air circulation system 20 is connected to the air introduction duct 37 as a first duct for taking in air in the vehicle interior, and is connected to the air introduction duct 37 to cool the taken-in air by the refrigeration system 11. A cooling chamber 38 and an air discharge duct 39 connected to the cooling chamber 38 as a second duct for discharging the cooled air into the vehicle compartment. A cooling unit 40 is disposed in the cooling chamber 38. The

  An on-off valve 47 formed of a heat insulating material in the air introduction duct 37, an on-off valve 48 formed of a heat insulating material in the air discharge duct 39, and a vehicle compartment side from the on-off valve 48, An air conditioning fan 49 is provided as a second fan. By operating the air conditioning fan 49, the air in the air discharge duct 39 is sucked and sent to the passenger compartment.

  The air discharge duct 39 is provided with a heater (not shown). The heater is provided with cooling water heated as the engine (E / G) 16 is cooled, exhaust gas passing through the muffler, and the like. Sent and air is heated as needed. Therefore, the air is heated by the heater while the refrigeration system 11 is stopped, so that the vehicle interior can be dehumidified or heated. Further, by using a reversible compressor as the compressor 12 and causing the refrigeration system 11 to function as a heat pump refrigeration system, the air can be heated and the vehicle interior can be heated.

  The cooling unit 40 includes an evaporator 15, a heat exchanger 41, and a cold storage unit 43. The cold storage unit 43 is sandwiched between the evaporator 15 and the heat exchanger 41, and the evaporator 15 and the heat exchanger 41. The cold heat generated by the refrigeration system 11 that is disposed in contact with the water is accumulated by water as a heat storage medium that undergoes a phase change, is transmitted to the heat exchanger 41, and is circulated through the air circulation system 20. introduce.

  The evaporator 15 includes a refrigerant pipe 26 formed in a meandering manner, surrounds the refrigerant pipe 26, and is in contact with the refrigerant pipe 26 and the first surface s 1 of the cold storage unit 43. And a heat transfer coupler 27 as a heat transfer member, and a casing body 28 surrounding the refrigerant pipe 26 and the heat transfer coupler 27. The heat transfer coupler 27 has a “C” shape, is formed to protrude from an enclosing portion 27 a surrounding the refrigerant pipe 26, and a central portion of the enclosing portion 27 a, and comes into contact with the cold storage portion 43. A flat surface is provided, and a support portion 27b that supports the surrounding portion 27a is provided. The refrigerant pipe 26, the heat transfer coupler 27, and the casing 28 are all made of the heat conductive material.

  The heat exchanger 41 is formed by a matrix fin structure 41 a made of the thermally conductive material, and is attached to the second surface s 2 of the cold storage unit 43. The air supplied to the cooling chamber 38 via the air introduction duct 37 passes through the fin structure 41 a and the outside of the housing 28, and is cooled by the heat exchanger 41 and the evaporator 15 during that time. It is discharged through. A drain valve 50 for discharging water condensed when the air is cooled by the heat exchanger 41, that is, condensed water, is disposed at the lower end of the heat exchanger 41.

  By the way, in the cool storage unit 43, water that undergoes a phase change between the liquid phase and the solid phase is accommodated in the space 29 in the box-shaped housing 44, and the first surface s1 side. Between the side wall 44a and the side wall 44b on the second surface s2 side (about 4 to 5 [mm]), a plurality of coupling bodies 46 as heat transfer members are disposed, and the evaporator 15 and the heat exchanger 41 is selectively thermally connected. Each of the coupling bodies 46 can be disposed at any location in the space 29. In the present embodiment, however, the coupling body 46 is supported on the side wall 44a corresponding to the portion where the heat transfer coupler 27 is disposed. It is disposed on the back surface of the portion to which the portion 27b is attached. In addition, a temperature sensor as a temperature detection unit that detects the temperature of the space 29 is disposed at a predetermined location in the cold storage unit 43.

  Each of the connecting bodies 46 is formed of a columnar body having a circular cross section, and is disposed so as to be able to contact with and separate from the fixed connecting portion 61 as a first connecting portion attached to the side wall 44a. In addition, a movable connecting portion 62 as a second connecting portion, a holding portion 63 attached to the side wall 44b, and a bimetal 64 as an elastic member disposed between the movable connecting portion 62 and the holding portion 63 are provided. The fixed connecting portion 61, the movable connecting portion 62, the holding portion 63, and the bimetal 64 are all made of the thermally conductive material.

  A flange portion 61a having a large diameter is formed at an end portion of the fixed connecting portion 61 on the side in contact with the side wall 44a. Therefore, since the contact area between the connecting body 46 and the side wall 44a can be increased, the amount of cold heat transmitted to the connecting body 46 can be increased.

  The connecting body 46 takes the first and second states according to the temperature in the cold storage unit 43, and takes the first state when the temperature of the space 29 is higher than a threshold value. Is below the threshold value, the second state is taken. In the first state, the bimetal 64 expands, the movable connecting part 62 comes into contact with the fixed connecting part 61, and the evaporator 15 and the heat exchanger 41 are physically connected. In the second state, the bimetal 64 contracts, the movable connecting part 62 moves away from the fixed connecting part 61, and the evaporator 15 and the heat exchanger 41 are physically shut off.

  Therefore, when the load of air conditioning becomes large and the temperature of the heat exchanger 41 becomes high, the temperature of the space 29 becomes higher than the threshold value, and the coupling body 46 takes the first state. In the first state, most of the cold heat transmitted from the evaporator 15 can be directly transmitted to the heat exchanger 41, so that the air can be sufficiently cooled. In the first state, the remaining portion of the cold heat can be transmitted to the water in the space 29 to form the ice i1, and cold storage can be performed.

  Further, in the second state, most of the cold heat transmitted from the evaporator 15 is transmitted to the water in the space 29 to form ice i1 for cold storage, and the remaining cold heat is transferred to the space 29. It can be transmitted to the water inside and can be transmitted to the heat exchanger 41 via the water. The refrigerant pipe 26 transmits the latent heat of the ice i1 in the space 29 to the heat exchanger 41 as cold heat.

  In the space 29, a mesh-like matrix 31 formed of a heat conductive material, for example, a carbon fiber net is disposed in contact with the connector 46. In the present embodiment, the matrix 31 is brought into contact with the coupling body 46, but can also be brought into contact with the side walls 44a and 44b as necessary. In addition, in order to improve heat transfer between water and the matrix 31, the coupling body 46, etc., fine particles (not shown) formed of a heat conductive material, such as carbon, float as suspended particles in the water. Be made. In this case, the suspended particles do not settle and maintain a floating state, so that heat transfer can be improved. Further, the matrix 31 prevents stress from being applied to the housing 44 when the water becomes ice i1 and the volume expands.

  The water is cooled by receiving cold heat from the evaporator 15 to become ice i1, and the ice i1 is heated by receiving heat from the air flowing through the heat exchanger 41 to become water. In the meantime, the temperature of the water does not drop or rise, and can maintain a constant temperature. Therefore, a sufficient amount of cold energy can be stored.

  Since the volume expands when the water becomes the ice i1, a space having a volume of about 15% with respect to the volume of water is formed in the space 29 in the water state. Further, in order to adjust the pressure in the space 29, a relief valve 51 is disposed facing the gap, and when the pressure in the space 29 exceeds a threshold value, the relief valve 51 reduces the pressure in the space 29. Let it go.

  In addition, on the side of the side wall 44b of the coupling body 46, a cylindrical heat insulating member (not shown) formed of a heat insulating material can be disposed so as to surround the holding portion 63. In this case, the heat insulating member blocks the movement of heat between the space 29 and the connecting body 46 at the holding portion 63. As a result, the growth of the ice i1 at the end of the coupling body 46 on the side wall 44b side is prevented, so that the volume of the ice i1 does not expand excessively.

  In the present embodiment, the movable connecting portion 62 and the bimetal 64 in the connecting body 46 are formed by columnar bodies having a circular cross section, but other arbitrary shapes such as the refrigerant pipe 26 are used. It can be formed by a plate-like body extending along. In that case, a widened portion is formed at the end of the connecting body 46 on the side in contact with the side wall 44a in order to increase the contact area between the connecting body 46 and the side wall 44a. A widened portion is also formed at the end of the holding portion 63 on the side in contact with the side wall 44b in order to increase the contact area between the holding portion 63 and the side wall 44b.

  By the way, in this embodiment, in order to run the vehicle, the engine 16, the generator (G) 71 as the first electric machine, and the drive motor (M) 72 as the second electric machine are different. A planetary gear unit 73 as a dynamic rotating device is disposed so as to be differentially rotatable with respect to each other. The planetary gear unit 73 includes a sun gear S as a first differential element, a pinion P that meshes with the sun gear S, a ring gear R as a second differential element that meshes with the pinion P, and the pinion A carrier CR is provided as a third differential element that rotatably supports P. The generator 71 is connected to the sun gear S, the output shaft 74 is connected to the ring gear R, and the engine 16 is mechanically connected to the carrier CR. A counter drive gear 75 as a first gear is attached to the output shaft 74, a counter driven gear 76 as a second gear is attached to the output shaft 78 of the drive motor 72, and the counter drive gear 75 and the counter The driven gear 76 is meshed. Then, driving wheels 65 as wheels are connected to the output shaft 78. As a result, the ring gear R, the drive motor 72, and the drive wheel 65 are mechanically connected. Reference numeral 17 denotes an output shaft of the engine 16.

  The generator 71 is connected to an inverter 81 as a generator inverter, the drive motor 72 is connected to an inverter 82 as a drive motor inverter, and each of the inverters 81 and 82 is a plurality of, for example, six switching elements. Each transistor is united as a unit to constitute a transistor module (IGBT) for each phase. The inverters 81 and 82 are connected to the battery 84 and the compressor 12 via the divider 83.

  Reference numeral 85 denotes an accelerator pedal position (depression amount) (not shown), that is, an accelerator switch as an accelerator operation detection unit for detecting the accelerator pedal position, and 86 denotes a brake pedal position (depression amount), ie, a brake, not shown. A brake switch 87 serving as a brake operation detection unit that detects the pedal position is a battery remaining amount detection device that detects a remaining battery level that represents the state of charge of the battery 84.

  Reference numeral 54 denotes a control unit that performs overall control of the in-vehicle air conditioning system. The control unit 54 includes a CPU (not shown) as a computing device, a memory (not shown) as a storage device, and the CPU includes a predetermined program, It performs various calculations based on data and functions as a computer. The drive motor 72, the refrigeration system 11, the cooling unit 40, etc. constitute an in-vehicle air conditioning system.

  Next, the operation of the hybrid vehicle having the above configuration will be described.

  First, vehicle speed detection processing means (not shown) of the control unit 54 performs vehicle speed detection processing, reads the rotor position of the drive motor 72, that is, the rotor position, and calculates the change rate of the rotor position, thereby calculating the drive motor 72. , That is, the drive motor rotation speed is calculated, and the vehicle speed proportional to the drive motor rotation speed is detected.

  Subsequently, a vehicle request torque determination processing unit (not shown) of the control unit 54 performs vehicle request torque determination processing to drive a hybrid type vehicle set in advance corresponding to the accelerator pedal position, the brake pedal position, and the vehicle speed. The required vehicle torque is calculated.

  Next, the control unit 54 determines whether or not the vehicle request torque is greater than the maximum value of the drive motor torque of the drive motor 72, and if it is greater than the maximum value, determines whether or not the engine 16 is stopped. When the engine 16 is stopped, the drive motor 72 and the generator 71 are driven to run the hybrid vehicle.

  Further, when the vehicle request torque is equal to or less than the maximum value of the drive motor torque, or when the vehicle request torque is larger than the maximum value of the drive motor torque and the engine 16 is being driven, an operation (not shown) of the control unit 54 is performed. The driver request output calculation processing means performs driver request output calculation processing, and calculates the driver request output by multiplying the vehicle request torque and the vehicle speed.

  Next, a battery charge / discharge request output calculation processing unit (not shown) of the control unit 54 performs battery charge / discharge request output calculation processing, reads the battery remaining amount from the battery remaining amount detecting device 87, and based on the battery remaining amount. To calculate the battery charge / discharge request output.

  Subsequently, vehicle request output calculation processing means (not shown) of the control unit 54 performs vehicle request output calculation processing, and calculates the vehicle request output by adding the driver request output and the battery charge / discharge request output. .

  Next, an engine target operation state setting processing unit (not shown) of the control unit 54 performs an engine target operation state setting process, and the vehicle required output and an optimum fuel consumption curve at which the efficiency of the engine 16 at the accelerator pedal position is highest. Is determined as an operation point of the engine 16 in the engine target operation state, the engine torque at the operation point is determined as the engine target torque, and the engine rotation speed at the operation point, that is, the engine rotation speed is determined. Determined as the target engine speed.

  Then, the control unit 54 determines whether or not the engine 16 is placed in a drive region determined by the vehicle speed, the vehicle required torque, and the remaining battery level, and is driven even though the engine 16 is placed in the drive region. If not, the engine 16 is started.

  Further, when the engine 16 is not placed in the drive region and the engine 16 is not driven, drive motor target torque calculation processing means (not shown) of the control unit 54 performs drive motor target torque calculation processing, and the vehicle The requested torque is calculated and determined as the drive motor target torque, and a drive motor control processing unit (not shown) of the control unit 54 performs a drive motor control process and performs a torque control of the drive motor 72.

  Further, when the engine 16 is placed in the drive region and the engine 16 is driven, an engine control processing unit (not shown) of the control unit 54 performs engine control processing and controls the engine 16 by a predetermined method. I do.

  Next, a generator target rotation speed calculation processing unit (not shown) of the control unit 54 performs a generator target rotation speed calculation process, calculates the rotation speed of the ring gear R based on the rotor position of the drive motor 72, and the ring gear R The generator target rotational speed is calculated and determined based on the rotational speed of the engine and the engine target rotational speed.

  By the way, when the generator target torque is determined based on the generator target rotation speed, the torque control of the generator 71 is performed, and the predetermined generator 71 torque, that is, the generator torque is generated, the engine torque, the ring gear Since the torque of R and the generator torque receive reaction forces with each other, the generator torque is converted into the torque of the ring gear R and output from the ring gear R.

  As the torque of the ring gear R is output from the ring gear R, the rotational speed of the generator 71, that is, the generator rotational speed fluctuates. Is transmitted to the drive wheel 65, and the traveling feeling of the hybrid vehicle is lowered. Therefore, the torque of the ring gear R is calculated in consideration of the torque corresponding to the inertia of the generator 71 accompanying the fluctuation of the generator rotational speed, and the torque of the drive shaft, that is, the drive shaft torque is calculated.

  Subsequently, the drive motor target torque calculation processing means calculates and determines a drive motor target torque by subtracting the drive shaft torque from the vehicle request torque as a drive motor target torque.

  Then, the drive motor control processing means performs torque control of the drive motor 72 based on the determined drive motor target torque, and drives the drive motor 72.

  In this manner, the hybrid vehicle can be driven by driving the engine 16, the generator 71, and the drive motor 72.

  By the way, in this Embodiment, the electric power generated by driving the generator 71 is supplied to the battery 84 via the divider | distributor 83, and the battery 84 is charged. Then, the electric power generated by discharging the battery 84 is supplied to the refrigeration system 11 and used to drive the compressor 12. On the other hand, when the hybrid vehicle is decelerated, the electric power regenerated by the drive motor 72 is divided by the divider 83 and supplied mainly to the refrigeration system 11 via the divider 83, and the compressor 12 It is used for driving, and the remainder is supplied to the battery 84 via the divider 83 to charge the battery 84.

  Further, while the vehicle is running, the engine 16 is driven in a region where the efficiency is highest, and the driver required output of the vehicle required output is transmitted to the driving wheel via the planetary gear unit 73, and the remaining output The battery 84 can be charged by supplying the power generated by driving the generator 71 to the battery 84 via the divider 83.

  Next, the operation of the in-vehicle air conditioning system will be described.

  FIG. 4 is a flowchart showing the operation of the in-vehicle air conditioning system according to the first embodiment of the present invention.

  First, when an ignition switch (not shown) is turned on and the hybrid vehicle is started, a braking determination processing unit (not shown) of the control unit 54 (FIG. 1) performs a braking determination process, and the brake detected by the brake switch 86 is detected. The pedal position is read, and it waits for the brake pedal to be depressed based on the brake pedal position.

  When the brake pedal is depressed, the vehicle state acquisition processing unit (not shown) of the control unit 54 performs vehicle state acquisition processing to determine the vehicle speed, the air conditioner operation (whether the air conditioner 10 is turned on and the air conditioner 10 is being operated). Read) and the remaining battery charge. Subsequently, a mode selection processing unit (not shown) of the control unit 54 performs a mode selection process and selects an operation mode.

  Therefore, the mode selection processing means determines whether or not the vehicle speed is 40 [km / h] or less as a threshold when the air conditioner 10 is in operation, and the vehicle speed is 40 [km / h] or less. When the vehicle speed is lower than that in the city, the division mode is not selected. When the vehicle speed is higher than 40 km / h, the division mode is selected because the vehicle is traveling at a high speed and in the suburbs.

  When the split mode is selected, a split ratio setting processing unit (not shown) of the control unit 54 performs a split ratio setting process, based on the remaining battery level, that is, energy generated with braking of the hybrid vehicle, that is, In the present embodiment, regenerative energy is used to divide power into a part that is supplied to the refrigeration system 11 and used for air conditioning, and a part that is supplied to the battery 84 and used for power storage of the battery 84. Set the split ratio. Subsequently, a power storage / cold storage processing unit (not shown) of the control unit 54 performs power storage / cold storage processing, divides the electric power regenerated by the drive motor 72 at the split ratio by the divider 83, and partially freezes it. Supply to the system 11, drive the compressor 12, supply the rest to the battery 84, and charge the battery 84.

  Further, while the vehicle is running, the engine 16 is driven in a region where the efficiency is highest, and the driver required output of the vehicle required output is transmitted to the driving wheel via the planetary gear unit 73, and the remaining output The battery 84 can be charged by supplying the power generated by driving the generator 71 to the battery 84 via the divider 83.

  On the other hand, when the split mode is not selected and the normal mode is selected, the cold storage means (not shown) of the control unit 54 performs the cold storage process and supplies 100% of the electric power to the refrigeration system 11 side for air conditioning. Use as That is, all the electric power regenerated by the drive motor 72 is supplied to the refrigeration system 11 via the divider 83 to drive the compressor 12.

  As described above, in the present embodiment, when the air conditioner 10 needs to be turned on while the hybrid vehicle is traveling at a low speed, all of the electric power regenerated along with the braking of the hybrid vehicle is obtained. Can be effectively used to operate the refrigeration system 11. Therefore, the load applied to the engine 16 can be reduced, and the engine efficiency and the air conditioning efficiency can be increased.

  Moreover, since the regenerated electric power can be used to operate the refrigeration system 11 without supplying it to the battery 84, it is possible to suppress the loss of electric power due to charging and discharging. Therefore, the efficiency of air conditioning can be further increased.

Next, a flowchart will be described.
Step S1: The hybrid vehicle is activated.
Step S2 Wait for the brake pedal to be depressed, and if the brake pedal is depressed, the process proceeds to Step S3.
Step S3 Read the vehicle, the air conditioner operation and the remaining battery level.
Step S4: A mode selection process is performed.
Step S5: It is determined whether the division mode has been selected. If the division mode is selected, the process proceeds to step S6, and if not selected, the process proceeds to step S8.
Step S6: A division ratio is set.
Step S7 The power storage / cold storage process is performed and the process is terminated.
Step S8 A cold storage process is performed and the process is terminated.

  By the way, in the said cool storage part 43, if the temperature of the space 29 is higher than a threshold value, the connection body 46 will be in a 2nd state, the evaporator 15 and the heat exchanger 41 will be interrupted | blocked, and the temperature of the space 29 will be below a threshold value. Then, the connection body 46 is in the first state, and the evaporator 15 and the heat exchanger 41 are connected. At this time, most of the cold energy transmitted from the evaporator 15 is directly transmitted to the heat exchanger 41, but the remaining cold energy is transmitted to the water in the space 29, ice i1 is formed, and cold storage is performed. In this case, if the cold heat transmitted to the heat exchanger 41 is Q1, and the cold heat transmitted to the water in the space 29 is Q2, the cold heat Q2 is in a state where parasitic cold storage is performed on the cold heat Q1.

  And in the hybrid type vehicle equipped with the vehicle-mounted air conditioning system having the above-described configuration, when the engine 16 is operated with a partial load and the parasitic cold storage is performed in the cold storage unit 43, the efficiency of the engine 16 is increased. However, if the mechanism of the cool storage unit 43 continues to operate while the engine 16 is driven at a high speed and a high torque for a long time, if parasitic cool storage is performed in the cool storage unit 43, the engine The load on the engine 16 increases, and the fuel consumption of the engine 16 deteriorates.

  In addition, if the hybrid vehicle is parked for a long time under hot weather and then the hybrid vehicle is started and the air conditioner 10 is immediately operated in full cooling, the in-vehicle air conditioning system cannot function sufficiently. End up.

  Therefore, after the engine 16 is driven at a high speed and a high torque for a long time, the fuel efficiency of the engine 16 is deteriorated, or the hybrid type vehicle is parked for a long time under the hot sun, A description will be given of a second embodiment of the present invention in which it is possible to prevent a sufficient function from being prevented. In addition, about the thing which has the same structure as 1st Embodiment, the same code | symbol is provided and the effect of the same embodiment is used about the effect of the invention by having the same structure.

  FIG. 5 is a conceptual diagram of the hybrid vehicle according to the second embodiment of the present invention, FIG. 6 is a flowchart showing the operation of the hybrid vehicle according to the second embodiment of the present invention, and FIG. 7 is the second diagram of the present invention. It is a figure which shows the thermal efficiency map in the embodiment. In FIG. 7, the horizontal axis represents the engine rotation speed, and the vertical axis represents the effective pressure in the cylinder at the time of explosion (corresponding to engine torque).

  In the figure, 90 is a temperature sensor as a temperature detecting unit for detecting the temperature in the passenger compartment, 91 is a pipe for supplying and discharging water as a heat storage medium to and from the cold storage unit 43, and 92 is for storing the water A water storage tank as a heat storage medium accommodation portion, 93 is a valve as an opening / closing member, and 94 is a pump (P).

  Next, the operation of the hybrid vehicle having the above configuration will be described.

  First, when an ignition switch (not shown) is turned on, the hybrid vehicle is started, the air conditioner 10 is turned on, and the operation of the in-vehicle air conditioning system is started, the first air conditioning method of the control unit 54 is started. A temperature condition determination processing means (not shown) as a switching condition determination processing means performs a temperature condition determination process as a first air conditioning method switching condition determination process, reads the temperature τ detected by the temperature sensor 90, and the temperature τ is It is determined whether or not the temperature condition as the first air conditioning method switching condition is satisfied depending on whether or not the threshold value τth (for example, 35 [° C.]) or more.

  When the temperature τ is equal to or higher than the threshold τth and the temperature condition is satisfied, the heat storage medium control processing unit (not shown) of the control unit 54 performs the heat storage medium control processing, opens the valve 93, and stores the water in the cold storage unit 43. The direct cooling type air conditioning processing means (not shown) of the control unit 54 discharges to the tank 92, performs the direct cooling type air conditioning processing process, directly transmits the cold heat generated by the refrigeration system 11 to the heat exchanger 41, and air. Air conditioning is performed by transmitting air to the circulating system 20.

  Thereafter, when the temperature τ becomes lower than the threshold value τth, the heat storage medium control processing means drives the pump 94 while the valve 93 is open, and supplies the water in the water storage tank 92 to the cold storage unit 43.

  When the temperature τ is lower than the threshold τth and the temperature condition is not satisfied, the cold storage type air conditioning processing unit (not shown) of the control unit 54 performs the cold storage type air conditioning process, and as in the first embodiment, The cold heat generated by the refrigeration system 11 is accumulated by water, transmitted to the heat exchanger 41, and transmitted to the air that is circulated through the air circulation system 20, thereby performing air conditioning.

  When air conditioning is performed by the cold storage type air conditioning processing, the load condition determination processing means (not shown) as the second air conditioning method switching condition determination processing means of the control unit 54 is performed as the second air conditioning method switching condition determination processing. The load as the second air conditioning method switching condition depends on whether the engine 16 is driven at a high speed and with a high torque over a long period of time (several minutes, for example, 5 [minutes]). Determine whether the condition is met. In this case, when the engine rotation speed and the engine torque belong to the region AR1 in the thermal efficiency map, the engine 16 is driven at a high speed and with a high torque.

  In the thermal efficiency map of FIG. 7, the thermal efficiency is determined by the engine rotation speed and the effective pressure, and is represented by contour lines. When the instantaneous value (differential value) of the rate of change in thermal efficiency is calculated, if the instantaneous value takes a negative value, the engine rotation speed and the engine torque belong to the area AR1. Therefore, the load condition determination processing means determines whether or not the instantaneous value takes a negative value, and determines that the load condition is satisfied if the instantaneous value takes a negative value.

  When the engine 16 is driven at a high speed and a high torque for a long time and the load condition is established, the delay processing means of the control unit 54 performs the delay processing, and the ice i1 in the cold storage unit 43 is turned into water. Then, the heat storage medium control processing means opens the valve 93 and discharges the water in the cold storage section 43 to the water storage tank 92, and the direct cooling type air conditioning processing means is supplied by the refrigeration system 11. The generated cold heat is directly transmitted to the heat exchanger 41, and further transmitted to the air circulated through the air circulation system 20 to perform air conditioning.

  And when the said load conditions are not satisfied, the said cold storage type | formula air-conditioning processing means accumulate | stores the cold heat | fever generated by the refrigerating system 11 with water similarly to 1st Embodiment, and it is in the heat exchanger 41. The air is then transmitted to the air that can be circulated through the air circulation system 20 for air conditioning.

  The driver, who is an operator, can turn on the predetermined switch or select the predetermined mode in the air conditioning system to perform the delay process as necessary.

  Thus, in the present embodiment, when the temperature τ is equal to or higher than the threshold value τth and the temperature condition is satisfied, the cold heat generated by the refrigeration system 11 is directly transmitted to the heat exchanger 41 and further the air circulation system 20. Since the hybrid type vehicle is parked for a long time under hot weather, the hybrid type vehicle is started and immediately the air conditioner 10 is driven by full cooling. In addition, the in-vehicle air conditioning system can function sufficiently.

  In addition, when the engine 16 is driven at a high speed and a high torque for a long time to satisfy the load condition, the cold heat generated by the refrigeration system 11 is directly transmitted to the heat exchanger 41, and the air circulation system 20. Therefore, the load on the engine 16 can be prevented from increasing and the fuel consumption of the engine 16 can be improved.

Next, a flowchart will be described.
Step S11 The hybrid vehicle is activated.
Step S12: It is determined whether the temperature τ is equal to or higher than a threshold value τth. When the temperature τ is equal to or higher than the threshold τth, the process proceeds to step S13, and when the temperature τ is lower than the threshold τth, the process proceeds to step S17.
Step S13: Remove water from the cold storage unit 43.
Step S14 A direct cooling type air conditioning process is performed.
Step S15: It is determined whether the temperature τ is lower than the threshold value τth. When the temperature τ is lower than the threshold τth, the process proceeds to step S16, and when the temperature τ is equal to or higher than the threshold τth, the process returns to step S14.
Step S16: Return water to the cold storage unit 43.
Step S17 A cold storage type air conditioning process is performed.
Step S18: It is determined whether the load condition is satisfied. If the load condition is satisfied, the process proceeds to step S19. If the load condition is not satisfied, the process returns to step S17.
Step S19 Cold heat is used until the ice i1 in the cold storage unit 43 becomes water.
Step S20: It is determined whether or not the hybrid type vehicle has been stopped. If the hybrid type vehicle is stopped, the process is terminated. If the hybrid type vehicle is not stopped, the process proceeds to step S21.
Step S21: Remove water from the cold storage unit 43.

  The present invention is not limited to the above embodiments, and various modifications can be made based on the gist of the present invention, and they are not excluded from the scope of the present invention.

It is a conceptual diagram of the hybrid type vehicle in the 1st Embodiment of this invention. It is a conceptual diagram of the vehicle-mounted air conditioning system in the 1st Embodiment of this invention. It is an enlarged view of the cooling unit in the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the vehicle-mounted air conditioning system in the 1st Embodiment of this invention. It is a conceptual diagram of the hybrid type vehicle in the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the hybrid type vehicle in the 2nd Embodiment of this invention. It is a figure which shows the thermal efficiency map in the 2nd Embodiment of this invention.

Explanation of symbols

11 Refrigeration System 12 Compressor 13 Condenser 15 Evaporator 20 Air Circulation System 27 Heat Transfer Coupler 40 Cooling Unit 41 Heat Exchanger 43 Cold Storage Unit 54 Control Unit 65 Drive Wheel 72 Drive Motor 84 Battery

Claims (8)

  An electric machine that is mechanically coupled to the drive wheel and connected to the battery, a refrigeration system including a compressor, a condenser, and an evaporator, and cold generated by operating the refrigeration system, phase change A cooling unit that stores the heat in the heat storage medium and transmits the air to the air that is circulated through the air circulation system, and supplies the electric power generated by the electric machine as the vehicle travels to the refrigeration system to drive the compressor The vehicle-mounted air conditioning system characterized by having a cold storage processing means.   The in-vehicle air conditioner according to claim 1, wherein the cold storage processing means supplies the electric power regenerated by the electric machine with braking of the vehicle to the refrigeration system and drives the compressor when the vehicle speed is equal to or less than a threshold value. system.   The in-vehicle air conditioning system according to claim 1, further comprising a power storage / cold storage processing unit that divides the electric power and supplies the electric power to a battery and a refrigeration system when the vehicle speed is higher than a threshold value.   The cooling unit includes the evaporator, a heat exchanger disposed in an air circulation system, and a cold storage unit sandwiched between the evaporator and the heat exchanger, and the cold storage unit includes the evaporator and the heat exchanger. The vehicle-mounted air conditioning system according to claim 1, further comprising: a heat transfer member that connects between the heat transfer member and a heat storage medium accommodated around the heat transfer member.   The said heat-transfer member takes the 1st state which connects the said evaporator and a heat exchanger according to the temperature in a cool storage part, and the 2nd state which interrupts | blocks the said evaporator and a heat exchanger. 4. The on-vehicle air conditioning system according to 4.   A temperature condition determination processing means for determining whether or not a temperature condition depending on the temperature in the passenger compartment is satisfied, and when the temperature condition is satisfied, the cold heat generated by the refrigeration system is directly transmitted to the heat exchanger, and further the air The in-vehicle air conditioning system according to claim 1, further comprising a direct cooling type air conditioning processing means for performing air conditioning by transmitting to air circulated through the circulation system.   Load condition determination processing means for determining whether or not a load condition due to the engine load is satisfied, and when the load condition is satisfied, the cold generated by the refrigeration system is directly transmitted to the heat exchanger and further air circulation The in-vehicle air conditioning system according to claim 1, further comprising a direct cooling type air conditioning processing means for performing air conditioning by transmitting to air circulated through the system.   The in-vehicle air conditioning system according to claim 6 or 7, further comprising heat storage medium control processing means for supplying and discharging a heat storage medium to and from the cold storage unit.

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