JP2021008870A - Heat cycle system - Google Patents

Abstract

To provide a heat cycle system which enables adjustment of a temperature of a battery in a rankine cycle circuit enabling heat exchange with a coolant of an engine.SOLUTION: A heat cycle system 1 includes: a cooling circuit 3 in which a coolant of an engine 2 circulates; and a rankine cycle circuit 5 in which an insulative organic medium circulates. In a main circulation passage 50 of the rankine cycle circuit 5, a compression expander 51 which decompresses the organic medium, a condenser 52 which conducts heat exchange between the organic medium and outside air, a first pump 53 which compresses the organic medium are provided in this order along a first flow direction F1. In an area between the first pump 53 and the compression expander 51 in the main circulation passage 50, a battery container 55 in which the organic medium flows and an evaporator 56 which conducts heat exchange between the organic medium and the coolant of the cooling circuit 3 are provided. A battery 81 is provided in the battery container 55 so as to be immersed in the organic medium.SELECTED DRAWING: Figure 1

Description

The present invention relates to a thermal cycle system. More specifically, the present invention relates to a thermal cycle system including a cooling circuit of an internal combustion engine and a Rankine cycle circuit.

In recent years, the development of a waste heat recovery system that extracts mechanical energy and electrical energy from the waste heat of an internal combustion engine of a vehicle by using the Rankine cycle has been promoted. In such a waste heat regeneration system, the Rankine cycle that extracts energy from waste heat is heated by a pump that pumps the working medium, a heat exchanger that can exchange heat between the working medium and the cooling water of the internal combustion engine, and a heat exchanger. It is realized by a Rankine cycle circuit including an expander that generates mechanical energy and electrical energy by expanding the working medium, and a capacitor that condenses the working medium expanded by the expander (for example, Patent Document 1). reference).

Japanese Unexamined Patent Publication No. 2006-118754

By the way, in addition to an internal combustion engine as a driving force generation source, a so-called hybrid vehicle equipped with an electric motor is equipped with a battery temperature control system that maintains a battery that supplies electric power to the electric motor at a preferable temperature. However, if such a battery temperature control system is to be constructed separately from the Rankine cycle circuit that can exchange heat with the cooling water of the internal combustion engine as described above, a heater for heating the battery, a cooling circuit for cooling the battery, and the like are required. As a result, the number of parts, weight, cost, etc. of the entire vehicle may increase.

An object of the present invention is to provide a thermal cycle system in which the temperature of a battery can be adjusted by a Rankine cycle circuit that can exchange heat with cooling water of an internal combustion engine.

(1) The thermal cycle system according to the present invention (for example, the thermal cycle system 1 described later) is a cooling circuit (for example, a cooling circuit in which cooling water that exchanges heat with the internal combustion engine (for example, the engine 2 described later) and its exhaust is circulated. A cooling circuit 3) described later and a Rankine cycle circuit (for example, the Rankine cycle circuit 5 described later) in which an insulating organic medium circulates are provided, and a circulation flow path of the Rankine cycle circuit (for example, a main circulation flow described later) is provided. In the path 50), an expander (for example, described later) for reducing the pressure of the organic medium flowing along the first flow direction in order along the first flow direction (for example, the first flow direction F1 described later). The compression expander 51), the first heat exchanger that exchanges heat between the organic medium and the outside air (for example, the condenser 52 described later), and the organic medium that flows along the first flow direction are compressed. A container (for example, a first pump 53 described later) and a container through which an organic medium flows between the first pump and the expander in the circulation flow path (for example, a first pump 53 described later) are provided. For example, a battery container 55) described later and a second heat exchanger (for example, an evaporator 56 described later) that exchanges heat between the organic medium and the cooling water of the cooling circuit are provided in the container. Is provided with a power storage device (for example, a battery 81 described later) so as to be immersed in an organic medium.

(2) In this case, the container and the second heat exchanger are provided in the circulation flow path in order along the first flow direction, and the Rankine cycle circuit is the circulation flow path. Of the above, a bypass flow path (for example, a bypass flow path 60 described later) that connects between the first heat exchanger and the first pump and between the container and the second heat exchanger is provided, and the bypass flow is provided. It is preferable that the path is provided with a second pump (for example, a second pump 61 described later) that compresses the organic medium flowing along the first flow direction.

(3) The heat cycle system according to the present invention (for example, the heat cycle system 1 described later) includes a cooling circuit (for example, a cooling circuit 3 described later) in which cooling water that exchanges heat with the internal combustion engine and its exhaust is circulated. A Rankine cycle circuit (for example, Rankine cycle circuit 5 described later) through which an insulating organic medium circulates is provided, and a second circulation flow path (for example, main circulation flow path 50 described later) of the Rankine cycle circuit is provided. An expansion valve (for example, an electronic expansion valve 54 described later) for reducing the pressure of the organic medium flowing along the second flow direction in order along the flow direction (for example, the second flow direction F2 described later) and an organic A first heat exchanger that exchanges heat between the medium and the outside air (for example, a condenser 52 described later) and a compressor that compresses an organic medium flowing along the second flow direction (for example, compression described later). A second heat exchange is provided with an expander 51), and heat exchange is performed between the organic medium and the cooling water of the cooling circuit between the compressor and the expansion valve in the circulation flow path. A container (for example, an evaporator 56 described later) and a container through which an organic medium flows (for example, a battery container 55 described later) are provided, and the container is charged with electricity so as to be immersed in the organic medium. It is characterized in that an apparatus (for example, a battery 81 described later) is provided.

(4) In this case, the compressor compresses the organic medium flowing along the second flow direction and decompresses the organic medium flowing along the first flow direction opposite to the second flow direction. A first pump (for example, described later) that compresses the expansion valve and the organic medium flowing along the first flow direction in the circulation flow path. It is preferable that the first pump 53) of the above is provided in parallel.

(5) In this case, the container and the second heat exchanger are provided in the circulation flow path in order along the first flow direction, and the Rankine cycle circuit is the circulation flow path. Of these, a bypass flow path (for example, a bypass flow path 60 described later) that connects between the first heat exchanger and the expansion valve and between the container and the second heat exchanger is provided, and the bypass flow path is provided. Is preferably provided with a second pump (for example, a second pump 61 described later) that compresses the organic medium flowing along the first flow direction.

(6) In this case, it is preferable to further include a motor generator (for example, a motor generator 57 described later) connected to the expander.

(7) In this case, it is preferable to further include a motor generator (for example, a motor generator 57 described later) connected to the compression expander.

(1) The thermal cycle system of the present invention includes a cooling circuit in which cooling water that exchanges heat with the internal combustion engine and its exhaust is circulated, and a Rankine cycle circuit in which an insulating organic medium circulates. An expander, a first heat exchanger, and a first pump are provided in order along the first flow direction in the circulation flow path of the Rankine cycle circuit. Further, in this circulation flow path, between the first pump and the expander, there is a second heat exchanger that exchanges heat between the organic medium and the cooling water, and a container through which the organic medium flows. And, and a power storage device is provided inside the container so as to be immersed in an organic medium. In this heat cycle system, the organic medium is circulated along the first flow direction, so that a part of the heat energy obtained by heat exchange with the cooling water of the internal combustion engine in the second heat exchanger and a part of the heat energy in the container A part of the heat energy obtained by heat exchange with the power storage device can be released to the outside air to cool the internal combustion engine and the power storage device. In particular, in the present invention, by providing the power storage device in the container so as to be immersed in the insulating organic medium, heat exchange can be directly performed between the power storage device and the organic medium, so that the power storage device can be evenly distributed. It can be cooled effectively. As described above, according to the thermal cycle system of the present invention, the power storage device can be effectively cooled by the Rankine cycle circuit that can exchange heat with the cooling water of the internal combustion engine.

(2) In the present invention, a container accommodating the power storage device and a second heat exchanger are provided in the circulation flow path in order along the first flow direction. Therefore, according to the present invention, since the power storage device having a lower temperature zone can be cooled before the cooling water of the internal combustion engine as described above, both the power storage device and the internal combustion engine can be effectively cooled. Further, in the present invention, the circulation flow path between the first heat exchanger and the first pump and the container and the second heat exchanger are connected by a bypass flow path, and the first flow direction is connected to the bypass flow path. A second pump is provided to compress the organic medium flowing along. Therefore, according to the present invention, by adjusting the rotation speed of the second pump, the amount of the organic medium that flows into the second heat exchanger via the container and the amount of the organic medium that bypasses the container and flows into the second heat exchanger. Since the amount of the organic medium to be generated can be adjusted, the temperature of the power storage device and the temperature of the internal combustion engine can be adjusted with high accuracy.

(3) The thermal cycle system of the present invention includes a cooling circuit in which cooling water that exchanges heat with the internal combustion engine and its exhaust is circulated, and a Rankine cycle circuit in which an insulating organic medium circulates. The circulation flow path of the Rankine cycle circuit is provided with an expansion valve, a first heat exchanger, and a compressor in order along the second flow direction. Further, in this circulation flow path, between the compressor and the expansion valve, there is a second heat exchanger that exchanges heat between the organic medium and the cooling water, and a container through which the organic medium flows. , And a power storage device is provided inside the container so as to be immersed in an organic medium. In this heat cycle system, by circulating the organic medium along the second flow direction, a part of the heat energy obtained by heat exchange with the outside air in the first heat exchanger is given to the power storage device, and the power storage device Can be heated. In particular, in the present invention, by providing the power storage device in the container so as to be immersed in the insulating organic medium, heat exchange can be directly performed between the power storage device and the organic medium, so that the power storage device is evenly distributed. It can be heated effectively. As described above, according to the thermal cycle system of the present invention, the power storage device can be effectively heated by the Rankine cycle circuit that can exchange heat with the cooling water of the internal combustion engine.

(4) In the present invention, the circulation flow path is provided with a compression / expansion machine that compresses the organic medium along the second flow direction and depressurizes the organic medium along the first flow direction. Further, in the circulation flow path, an expansion valve for reducing the pressure of the organic medium along the second flow direction and a first pump for compressing the organic medium along the first flow direction are provided in parallel. In this heat cycle system, the compressor is made to function as a compressor, and the organic medium is circulated along the second flow direction. As described above, it is obtained by heat exchange with the outside air in the first heat exchanger. A part of the heat energy can be given to the power storage device to heat the power storage device. Further, in this heat cycle system, the compression expander functions as an expander, and the organic medium is circulated along the first flow direction, so that the heat obtained by heat exchange with the cooling water in the second heat exchanger is obtained. A part of the energy and a part of the heat energy obtained by heat exchange with the power storage device in the container can be released to the outside air to cool the internal combustion engine and the power storage device. As described above, according to the thermal cycle system of the present invention, both the temperature control of the internal combustion engine and the temperature control of the power storage device can be effectively performed by the Rankine cycle circuit.

(5) In the present invention, a container accommodating the power storage device and a second heat exchanger are provided in the circulation flow path in order along the second flow direction. Therefore, according to the present invention, by circulating the organic medium along the first flow direction, the power storage device in the container and the cooling water of the internal combustion engine can be cooled in this order. In a vehicle equipped with a power storage device and an internal combustion engine, the temperature range of the internal combustion engine is often higher than that of the power storage device. Therefore, in the present invention, since the power storage device having a lower temperature zone can be cooled before the cooling water of the internal combustion engine, both the power storage device and the internal combustion engine can be effectively cooled. Further, in the present invention, the circulation flow path between the first heat exchanger and the expansion valve and the container and the second heat exchanger are connected by a bypass flow path, and the bypass flow path is connected to the bypass flow path in the first flow direction. A second pump is provided to compress the organic medium flowing along. Therefore, according to the present invention, by adjusting the rotation speed of the second pump, the amount of the organic medium that flows into the second heat exchanger via the container and the amount of the organic medium that bypasses the container and flows into the second heat exchanger. Since the amount of the organic medium to be generated can be adjusted, the temperature of the power storage device and the temperature of the internal combustion engine can be adjusted with high accuracy.

(6) The thermal cycle system of the present invention further includes a motor generator connected to an inflator. Thereby, the pressure of the organic medium in the container can be controlled so that effective heat exchange is performed between the organic medium and the power storage device in the container. Further, when the organic medium is circulated along the first flow direction to cool the cooling water of the power storage device or the internal combustion engine, the motor generator functions as a generator to partially dissipate the waste heat of the power storage device or the internal combustion engine. Part of the waste heat of the engine can be recovered as electrical energy.

(7) The thermal cycle system of the present invention further includes a motor generator connected to a compression expander. As a result, as described above, the pressure of the organic medium in the container can be controlled, and a part of the waste heat of the power storage device and a part of the waste heat of the internal combustion engine can be recovered as electric energy.

It is a figure which shows the structure of the thermal cycle system which concerns on one Embodiment of this invention. It is a table for demonstrating the contents of a plurality of control modes realized by a control device. It is a figure which shows the flow of the organic medium realized in the battery heating mode. It is a figure which shows the flow of the organic medium realized in the battery cooling mode. It is a figure which shows the flow of the organic medium realized in the 1st and 2nd engine cooling modes. It is a figure which shows the flow of the organic medium realized in the 1st and 2nd hybrid cooling modes. It is a Moriel diagram of the thermal cycle realized in the Rankine cycle circuit when the battery heating mode is executed. It is a Moriel diagram of the thermal cycle realized in the Rankine cycle circuit when the battery cooling mode is executed. FIG. 5 is a Moriel diagram of the thermal cycle realized in the Rankine cycle circuit when the first and second engine cooling modes are executed. FIG. 5 is a Moriel diagram of the thermal cycle realized in the Rankine cycle circuit when the first and second hybrid cooling modes are executed.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a thermal cycle system 1 according to the present embodiment. The thermal cycle system 1 is mounted on a vehicle equipped with an internal combustion engine 2 (hereinafter referred to as "engine 2") to warm up the engine 2 at the time of starting and to recover waste heat generated in the engine 2 after warming up to generate electricity. Convert to energy.

The thermal cycle system 1 includes a cooling circuit 3 in which the engine 2 is included in a part of the path and circulation of cooling water, a Rankine cycle circuit 5 in which an insulating organic medium circulates, and these cooling circuits 3 and the Rankine cycle circuit 5. A control device 7 to be operated and a battery 81 capable of discharging and charging are provided.

The cooling circuit 3 is composed of a cooling water circulation flow path 33 through which cooling water that exchanges heat with the engine 2 and its exhaust gas circulates, and a plurality of devices provided in the circulation flow path 33. More specifically, the cooling circuit 3 includes a circulation flow path 33 including an evaporator 56, which will be described later, provided in the Rankin cycle circuit 5, and a first cooling water flow path 31 which is a part of the circulation flow path 33. The second cooling water flow path 32, which is a part of the circulation flow path 33, the first water pump 35 and the second water pump 36 for pumping the cooling water in the circulation flow path 33, and the cooling water flowing through the circulation flow path 33. A heater core 37 that heats the cabin and a bypass flow path 34 that bypasses the second cooling water flow path 32, the second water pump 36, and the heater core 37 among the circulation flow paths 33 are provided.

The first cooling water flow path 31 is a flow path for cooling water formed in the cylinder block of the engine 2 and promotes heat exchange between the cooling water and the engine 2. The second cooling water flow path 32 is a flow path for cooling water that promotes heat exchange between the cooling water and the exhaust gas. The second cooling water flow path 32 is formed in the exhaust pipe on the downstream side of the exhaust purification catalyst 21. The evaporator 56 is on the downstream side of the second cooling water flow path 32 and the heater core 37 and is the first in the annular circulation flow path 33 when the cooling water is circulated by the first water pump 35 and the second water pump 36. It is provided at a position such that it is on the upstream side of the cooling water flow path 31.

The first water pump 35 is provided between the evaporator 56 and the first cooling water flow path 31 in the circulation flow path 33. The first water pump 35 operates in response to a control signal from the control device 7, and pumps cooling water from the evaporator 56 side to the first cooling water flow path 31 side in the circulation flow path 33.

The bypass flow path 34 connects the branch portion 38 between the first cooling water flow path 31 and the second cooling water flow path 32 and the evaporator 56 of the circulation flow path 33. Therefore, a part of the cooling water flowing out from the first cooling water flow path 31 is returned to the evaporator 56 or the first water pump 35 via the bypass flow path 34.

The second water pump 36 is provided between the branch portion 38 and the second cooling water flow path 32 in the circulation flow path 33. The second water pump 36 operates in response to a control signal from the control device 7, and pumps cooling water from the first cooling water flow path 31 side to the second cooling water flow path 32 side in the circulation flow path 33.

The Rankine cycle circuit 5 includes an annular main circulation flow path 50 in which an insulating organic medium having a boiling point and a lower specific heat than that of cooling water circulates, a compression expander 51 provided in the main circulation flow path 50, and condensation. A device 52, a first pump 53, an electronic expansion valve 54, a battery container 55, an evaporator 56, a bypass flow path 60 that bypasses a part of a plurality of devices provided in the main circulation flow path 50, and this bypass flow. A second pump 61 provided on the road 60 is provided.

The compression expander 51 is provided between the evaporator 56 and the condenser 52 in the main circulation flow path 50. The compression expander 51 decompresses the organic medium flowing through the main circulation flow path 50 from the evaporator 56 side to the condenser 52 side (hereinafter, this flow direction is also referred to as “first flow direction F1”), and the main circulation flow. The organic medium flowing through the path 50 from the condenser 52 side to the evaporator 56 side is compressed (hereinafter, this flow direction is also referred to as "second flow direction F2"). The compression expander 51 decompresses the organic medium that has passed through the evaporator 56 and supplies it to the condenser 52 when the organic medium flows in the main circulation flow path 50 along the first flow direction F1 in the normal rotation. Further, the compression expander 51 compresses the organic medium that has passed through the condenser 52 and supplies the organic medium to the evaporator 56 at the time of reversal in which the organic medium flows through the main circulation flow path 50 along the second flow direction F2.

A motor generator 57 is connected to the drive shaft 51a of the compression expander 51. The motor generator 57 can transfer electrical energy to and from the battery 81 in response to a control signal from the control device 7. Therefore, the motor generator 57 uses the electric power supplied from the battery 81 to rotate the compression / expander 51 forward or reverse, or generates electricity with the mechanical energy recovered in the process of depressurizing the organic medium in the compression / expansion machine 51. It is possible to charge the battery 81 with the generated power.

The condenser 52 is provided on the downstream side of the compression expander 51 along the first flow direction F1 in the main circulation flow path 50. The condenser 52 includes an organic medium flow path through which the organic medium passes and a fan that supplies outside air to the organic medium flow path, and exchanges heat between the organic medium and the outside air.

The evaporator 56 is provided on the upstream side of the compression expander 51 along the first flow direction F1 in the main circulation flow path 50. The evaporator 56 includes an organic medium flow path through which the organic medium flows and a cooling water flow path through which the cooling water of the cooling circuit 3 passes, and exchanges heat between the organic medium and the cooling water.

The battery container 55 is provided on the upstream side of the evaporator 56 along the first flow direction F1 in the main circulation flow path 50. An organic medium passes through the inside of the battery container 55. Further, inside the battery container 55, a battery 81 is provided so as to be immersed in an organic medium. Therefore, the battery 81 can exchange heat with the organic medium flowing through the battery container 55.

The portion of the main circulation flow path 50 between the condenser 52 and the battery container 55 is branched into a first branch passage 50a and a second branch passage 50b. A first pump 53 is provided in the first branch passage 50a, and an electronic expansion valve 54 is provided in the second branch passage 50b. That is, the first pump 53 and the electronic expansion valve 54 are provided in parallel in the main circulation flow path 50.

The first pump 53 is provided on the downstream side of the condenser 52 and on the upstream side of the battery container 55 along the first flow direction F1 in the first branch path 50a. The first pump 53 operates in response to a control signal from the control device 7 to compress the organic medium flowing along the first flow direction F1 in the first branch path 50a. The rotation speed of the first pump 53 is adjusted by the control device 7.

The electronic expansion valve 54 is provided on the downstream side of the battery container 55 and on the upstream side of the condenser 52 along the second flow direction F2 in the second branch passage 50b. The electronic expansion valve 54 is a throttle valve and depressurizes the organic medium flowing along the second flow direction F2 in the second branch passage 50b. The opening degree of the electronic expansion valve 54 is adjusted according to the control signal from the control device 7.

From the above, in the order along the first flow direction F1, the main circulation flow path 50 includes a compression expander 51, a condenser 52, a first pump 53, a battery container 55, and an evaporator 56. Is provided. Further, in the order along the second flow direction F2, the main circulation flow path 50 is provided with a compression expander 51, an evaporator 56, a battery container 55, an electronic expansion valve 54, and a condenser 52. Has been done.

The bypass flow path 60 connects between the condenser 52 and the branch paths 50a and 50b of the main circulation flow path 50 and between the battery container 55 and the evaporator 56. That is, the bypass flow path 60 forms a flow path that bypasses the first pump 53, the electronic expansion valve 54, and the battery container 55 in the main circulation flow path 50.

The second pump 61 operates in response to a control signal from the control device 7 to compress the organic medium flowing along the first flow direction F1 in the main circulation flow path 50. The rotation speed of the second pump 61 is adjusted by the control device 7. That is, by turning on the second pump 61, a part of the organic medium flowing out from the condenser 52 along the first flow direction F1 is bypassed from the first pump 53, the electronic expansion valve 54, and the battery container 55. Then, it is refluxed to the evaporator 56.

According to the thermal cycle system 1 as described above, a plurality of controls are performed by operating the first pump 53, the electronic expansion valve 54, the motor generator 57, the second pump 61, and the like of the Rankine cycle circuit 5 by the control device 7. The Rankine cycle circuit 5 can be operated in the mode.

FIG. 2 is a table summarizing the contents of a plurality of control modes realized by the control device 7.
As shown in FIG. 2, the control modes are a battery heating mode that mainly heats the battery 81, a battery cooling mode that mainly cools the battery 81, and the engine 2 and the engine 2 while recovering the waste heat of the engine 2. The first engine cooling mode that cools the cooling water, the first hybrid cooling mode that cools the battery 81, the engine 2 and its cooling water while recovering the waste heat of the engine 2, and the engine faster than the first engine cooling mode. It is divided into six modes: a second engine cooling mode for cooling 2 and a second hybrid cooling mode for cooling the battery 81, the engine 2 and its cooling water more quickly than the first hybrid cooling mode. Of the above six control modes, the battery cooling mode, the first engine cooling mode, and the first hybrid cooling mode can be said to be waste heat recovery modes capable of recovering the waste heat of the battery 81 and the engine 2.

As shown in FIG. 2, the control device 7 divides the state of the engine 2 into three states according to the cooling water temperature of the engine 2. More specifically, the state of the engine 2 is that the cooling water temperature is lower than the predetermined waste heat recoverable temperature and the waste heat of the engine 2 cannot be recovered by the Rankin cycle circuit 5, and the cooling water temperature is different. The waste heat recoverable temperature is equal to or higher than the waste heat recoverable temperature, and the waste heat recoverable state of the engine 2 can be recovered by the Rankin cycle circuit 5, and the cooling water temperature is higher than the waste heat recoverable temperature set to be higher than the engine protection temperature. It is divided into an engine protection request state in which the engine 2 and its cooling water need to be cooled promptly. In the following, the state of the engine 2 is classified into a state in which waste heat cannot be recovered, a state in which waste heat can be recovered, and a state in which engine protection is required, depending on the temperature of the cooling water of the engine 2, which is the temperature of the portion correlated with the engine 2. However, the present invention is not limited to this. More specifically, the state of the engine 2 may be classified according to the temperature of the engine 2 instead of the cooling water temperature of the engine 2.

Further, as shown in FIG. 2, the control device 7 divides the state of the battery 81 into two states according to the battery temperature, which is the temperature thereof. More specifically, the states of the battery 81 include a battery heating request state in which the battery temperature is lower than the optimum temperature and the battery 81 needs to be heated, and a battery temperature is equal to or higher than the optimum temperature to cool the battery 81. It is divided into the required battery cooling requirements and the required battery cooling conditions.

As shown in FIG. 2, when the state of the engine 2 is the state where the waste heat cannot be recovered and the state of the battery 81 is the battery heating request state, the control device 7 is a Rankine cycle under the battery heating mode. When the circuit 5 is operated and the state of the engine 2 is the state where waste heat recovery is not possible and the state of the battery 81 is the battery cooling request state, the Rankine cycle circuit 5 is operated under the battery cooling mode. Further, the control device 7 operates the Rankine cycle circuit 5 under the first engine cooling mode when the state of the engine 2 is the state in which waste heat can be recovered and the state of the battery 81 is the state requiring battery heating. When the state of the engine 2 is the state in which waste heat can be recovered and the state of the battery 81 is the state requiring battery cooling, the Rankine cycle circuit 5 is operated under the first hybrid cooling mode. Further, when the state of the engine 2 is the engine protection request state and the state of the battery 81 is the battery heating request state, the control device 7 operates the Rankin cycle circuit 5 under the second engine cooling mode. When the state of the engine 2 is the engine protection required state and the state of the battery 81 is the battery cooling required state, the Rankin cycle circuit 5 is operated under the second hybrid cooling mode. The details of each control mode will be described below.

<Battery heating mode>
FIG. 3A is a diagram showing the flow of the organic medium realized in the Rankine cycle circuit 5 when the battery heating mode is executed. In the battery heating mode, the control device 7 has a compression expander 51, an evaporator 56, a battery container 55, and an electronic expansion valve along the second flow direction F2, as shown by a thick arrow in FIG. 3A. The Rankine cycle circuit 5 is operated so as to circulate in the order of 54 and the condenser 52. More specifically, in the battery heating mode, the control device 7 turns off the first pump 53 and the second pump 61, and compresses the motor generator 57 by supplying electric power from the battery 81 to the motor generator 57. The expander 51 is reversed, and the electronic expansion valve 54 is further opened. In the battery heating mode, the control device 7 operates the Rankine cycle circuit 5 as described above to realize the thermal cycle as shown in FIG. 4A.

FIG. 4A is a Moriel diagram showing the thermal cycle realized in the Rankine cycle circuit 5 when the battery heating mode is executed. In FIG. 4A, the saturated vapor line of the organic medium is shown by a fine broken line, and the saturated liquid line of the organic medium is shown by a fine dashed line. That is, the organic medium is in a superheated steam state on the right side of the saturated steam line, in a supercooled state on the left side of the saturated liquid line, and in a boiling state between the saturated steam line and the saturated liquid line. As shown in FIG. 4A, when the battery heating mode is executed, the organic medium is compressed by the compression expander 51 and supplied to the evaporator 56 and the battery container 55 in the state of superheated steam. The organic medium compressed by the compression expander 51 is cooled by heat exchange between the cooling water and the battery 81 in the process of flowing through the evaporator 56 and the battery container 55, and is supplied to the electronic expansion valve 54 in the state of a supercooled liquid. .. The organic medium supplied to the electronic expansion valve 54 is depressurized by the electronic expansion valve 54 and supplied to the condenser 52 in the state of a supercooled liquid or a mixed phase state. The organic medium supplied from the electronic expansion valve 54 is heated by heat exchange with the outside air in the process of flowing through the condenser 52, and is supplied to the compression expander 51 in the state of superheated steam. Therefore, when the battery heating mode is executed, a part of the thermal energy of the outside air is supplied to the battery 81, which raises the temperature of the battery 81.

<Battery cooling mode>
FIG. 3B is a diagram showing the flow of the organic medium realized in the Rankine cycle circuit 5 when the battery cooling mode is executed. In the battery cooling mode, the control device 7 has a first pump 53, a battery container 55, an evaporator 56, and a compression expander 51 along the first flow direction F1 in which the organic medium is shown by a thick arrow in FIG. 3B. , And the condenser 52, and the Rankine cycle circuit 5 is operated so that the organic medium circulates in this order. More specifically, in the battery heating mode, the control device 7 turns off the second pump 61, closes the electronic expansion valve 54, turns on the first pump 53, and rotates the compression expander 51 in the forward direction. In the battery cooling mode, the control device 7 operates the Rankine cycle circuit 5 as described above to realize the thermal cycle as shown in FIG. 4A.

FIG. 4B is a Moriel diagram showing the thermal cycle realized in the Rankine cycle circuit 5 when the battery cooling mode is executed. As shown in FIG. 4B, when the battery cooling mode is executed, the organic medium is compressed by the first pump 53 and supplied to the battery container 55 and the evaporator 56 in the state of a supercooled liquid. The organic medium compressed by the first pump 53 is heated by heat exchange between the battery 81 and the cooling water in the process of flowing through the battery container 55 and the evaporator 56, and is supplied to the compression expander 51 in the state of superheated steam. .. The organic medium flowing out of the evaporator 56 in the state of superheated steam is depressurized in the compression expander 51 and supplied to the condenser 52 in the state of superheated steam. The organic medium supplied from the compression expander 51 is cooled by heat exchange with the outside air in the process of flowing through the condenser 52, and is supplied to the first pump 53 in the state of a supercooled liquid. Therefore, when the battery cooling mode is executed, a part of the thermal energy of the battery 81 is released to the outside air, which lowers the temperature of the battery 81. Here, in the battery cooling mode, the control device 7 is such that the organic medium is maintained in a boiling state in the battery container 55, in other words, the battery 81 is cooled by the latent heat of the organic medium in the battery container 55. The first pump 53 and the motor generator 57 are operated.

Here, the boiling point of the organic medium in the battery container 55 changes depending on the amount and pressure of the organic medium in the battery container 55. Therefore, in the battery cooling mode, the control device 7 sets the first pump 53 and the motor generator 57 so that the boiling point of the organic medium in the battery container 55 is maintained at a target temperature determined in the vicinity of the optimum temperature of the battery 81. It is used to control the amount and pressure of the organic medium in the battery vessel 55. More specifically, the control device 7 calculates the target amount and the target pressure of the organic medium in the battery container 55 so that the boiling point of the organic medium in the battery container 55 is maintained at the target temperature, and the battery. The rotation speed of the first pump 53 is adjusted so that the amount of the organic medium in the container 55 becomes the above target amount, and the motor generator 57 is generated so that the pressure of the organic medium in the battery container 55 becomes the above target pressure. , No load, or operate as a motor.

<1st engine cooling mode>
FIG. 3C is a diagram showing the flow of the organic medium realized in the Rankine cycle circuit 5 when the first and second engine cooling modes are executed. In the first engine cooling mode, the control device 7 has a second pump 61, an evaporator 56, a compression expander 51, and an organic medium along the first flow direction F1, as shown by a thick arrow in FIG. 3C. The Rankine cycle circuit 5 is operated so that the organic medium circulates in the order of the condenser 52. More specifically, in the first engine cooling mode, the control device 7 turns off the first pump 53, closes the electronic expansion valve 54, turns on the second pump 61, and rotates the compression expander 51 in the normal direction. .. In the first engine cooling mode, the thermal cycle as shown in FIG. 4C is realized by operating the Rankine cycle circuit 5 as described above by the control device 7.

FIG. 4C is a Moriel diagram showing the thermal cycle realized in the Rankine cycle circuit 5 when the first and second engine cooling modes are executed. As shown in FIG. 4C, when the first engine cooling mode is executed, the organic medium is compressed by the second pump 61 and supplied to the evaporator 56 in the state of a supercooled liquid. The organic medium compressed by the second pump 61 is heated by heat exchange with cooling water in the process of flowing through the evaporator 56, and is supplied to the compression expander 51 in the state of superheated steam. The organic medium flowing out of the evaporator 56 in the state of superheated steam is depressurized in the compression expander 51 and supplied to the condenser 52 in the state of superheated steam. The organic medium supplied from the compression expander 51 is cooled by heat exchange with the outside air in the process of flowing through the condenser 52, and is supplied to the second pump 61 in the state of a supercooled liquid. Here, in the first engine cooling mode, the control device 7 is generated by the motor generator 57 by utilizing the mechanical energy generated in the drive shaft 51a in the process of depressurizing the organic medium in the compression expander 51, and the electric power obtained by this is generated. Charges the battery 81 with. Therefore, when the first engine cooling mode is executed, a part of the thermal energy of the cooling water is released to the outside air and recovered as electric energy by the motor generator 57, which lowers the temperature of the cooling water and the engine 2. .. Here, in the first engine cooling mode, the control device 7 cools the cooling water in the evaporator 56 by the latent heat of the organic medium so that the organic medium is maintained in a boiling state in the evaporator 56. In this way, the second pump 61 and the motor generator 57 are operated.

Here, the boiling point of the organic medium in the evaporator 56 changes depending on the amount and pressure of the organic medium in the evaporator 56. Therefore, in the first engine cooling mode, the control device 7 uses the second pump 61 and the motor generator 57 to maintain the boiling point of the organic medium in the evaporator 56 at the target temperature of the cooling water, so that the organic medium in the evaporator 56 is organic. Control the amount and pressure of the medium. More specifically, the control device 7 calculates the target amount and the target pressure of the organic medium in the evaporator 56 so that the boiling point of the organic medium in the evaporator 56 is maintained at the target temperature, and the evaporator 56 The rotation speed of the second pump 61 is adjusted so that the amount of the organic medium in the above target amount is obtained, and the amount of power generated by the motor generator 57 is adjusted so that the pressure of the organic medium in the evaporator 56 becomes the above target pressure. ..

As described above, in the first engine cooling mode, the control device 7 operates the motor generator 57 as a generator, so that the pressure in the evaporator 56 is higher than that in the battery heating mode and the battery cooling mode described above. (See FIG. 2).

<1st hybrid cooling mode>
FIG. 3D is a diagram showing the flow of the organic medium realized in the Rankine cycle circuit 5 when the first and second hybrid cooling modes are executed. In the first hybrid cooling mode, the control device 7 has a first pump 53, a battery container 55, an evaporator 56, and a compression expansion along the first flow direction F1 as shown by a thick arrow in FIG. 3D. A first circulation flow path composed of the machine 51 and a condenser 52 in this order, and a second circulation flow path composed of a second pump 61, an evaporator 56, a compression expander 51, and a condenser 52 in this order. The Rankine cycle circuit 5 is operated so that the organic medium circulates along the two circulation channels of. More specifically, in the first hybrid cooling mode, the control device 7 closes the electronic expansion valve 54, turns on the first pump 53 and the second pump 61, and rotates the compression expander 51 in the normal direction. In the first hybrid cooling mode, the thermal cycle as shown in FIG. 4D is realized by operating the Rankine cycle circuit 5 as described above by the control device 7.

FIG. 4D is a Moriel diagram showing the thermal cycle realized in the Rankine cycle circuit 5 during execution of the first and second hybrid cooling modes. As shown in FIG. 4D, when the first hybrid cooling mode is executed, the organic medium is compressed by the first pump 53 and supplied to the battery container 55 in the state of a supercooled liquid. The organic medium compressed by the first pump 53 is heated by heat exchange with the battery 81 in the process of flowing through the battery container 55, and is supplied to the evaporator 56 in a superheated steam or a boiling state. The superheated steam or the organic medium flowing out from the battery container 55 in a boiling state is further heated by heat exchange with cooling water in the process of flowing through the evaporator 56, and is supplied to the compression expander 51 in the state of superheated steam. The organic medium flowing out of the evaporator 56 in the state of superheated steam is depressurized in the compression expander 51 and supplied to the condenser 52 in the state of superheated steam. The organic medium supplied from the compression expander 51 is cooled by heat exchange with the outside air in the process of flowing through the condenser 52, and is supplied to the first pump 53 in the state of a supercooled liquid. Further, as described above, in the first hybrid cooling mode, the second pump 61 is turned on in addition to the first pump 53. Therefore, a part of the organic medium flowing out from the condenser 52 in the state of supercooled liquid is compressed by the second pump 61, bypasses the first pump 53 and the battery container 55, and evaporates in the state of supercooled liquid. It is supplied to 56.

Here, in the first hybrid cooling mode, the control device 7 is generated by the motor generator 57 by utilizing the mechanical energy generated in the drive shaft 51a in the process of depressurizing the organic medium in the compression expander 51, and the electric power obtained by this is generated. Charges the battery 81 with. Therefore, when the first hybrid cooling mode is executed, a part of the thermal energy of the battery 81 and a part of the thermal energy of the cooling water are released to the outside air and recovered as electric energy by the motor generator 57. The temperature of the battery 81, the cooling water, and the engine 2 drops.

Here, in the first hybrid cooling mode, the control device 7 causes the organic medium to flow out from the battery container 55 at a temperature slightly lower than the boiling point, and the organic medium is maintained in a boiling state in the evaporator 56. In other words, the first pump 53 and the second pump so that the battery 81 is cooled by the sensible heat of the organic medium in the battery container 55 and the cooling water is cooled by the latent heat of the organic medium in the evaporator 56. The 61 and the motor generator 57 are operated.

As described above, the boiling point of the organic medium in the evaporator 56 changes depending on the amount and pressure of the organic medium in the evaporator 56. Therefore, in the first hybrid cooling mode, the control device 7 causes the temperature of the organic medium flowing out of the battery container 55 to flow out at a temperature slightly lower than the boiling point, and the boiling point of the organic medium in the evaporator 56 is the target temperature of the cooling water. A first pump 53, a second pump 61, and a motor generator 57 are used to control the amount and pressure of the organic medium in the evaporator 56 so that it is maintained. More specifically, the control device 7 uses the battery container so that the organic medium flows out from the battery container 55 at a temperature slightly lower than the boiling point and the boiling point of the organic medium in the evaporator 56 is maintained at the target temperature. The target amount of the organic medium in the 55 and the target amount and the target pressure of the organic medium in the evaporator 56 are calculated, and the rotation speed of the first pump 53 is adjusted so that the amount of the organic medium in the battery container 55 becomes the above target amount. Then, the rotation speed of the second pump 61 is adjusted so that the amount of the organic medium in the evaporator 56 becomes the above target amount, and the motor generator 57 further adjusts the pressure of the organic medium in the evaporator 56 to the above target pressure. Adjust the amount of power generation.

As described above, in the first hybrid cooling mode, the control device 7 operates the motor generator 57 as a generator, so that the pressure in the evaporator 56 is higher than that in the battery heating mode and the battery cooling mode described above. (See FIG. 2).

<Second engine cooling mode>
In the second engine cooling mode, the control device 7 has the organic medium flowing along the first flow direction F1 along the first flow direction F1 as shown by the thick arrow in FIG. 3C, similarly to the first engine cooling mode described above. The Rankine cycle circuit 5 is operated so that the organic medium circulates in the order of the evaporator 56, the compression expander 51, and the condenser 52. As a result, in the second battery cooling mode, as shown in FIG. 4C, a heat cycle qualitatively similar to that in the first battery cooling mode is realized.

As described with reference to FIG. 2, the control device 7 is the first when the battery 81 is in the battery heating request state, the cooling water temperature is equal to or higher than the waste heat recovery temperature, and the temperature is lower than the engine protection temperature. When the engine cooling mode is executed, the battery 81 is in the battery heating request state, the cooling water temperature is equal to or higher than the engine protection temperature, and the engine 2 and its cooling water need to be cooled promptly, the second engine cooling mode is executed. To execute. Therefore, in the second engine cooling mode, the control device 7 puts the motor generator 57 in a no-load state or supplies the electric power of the battery 81 to the motor generator 57 so that the cooling water can be cooled quickly. The compression expander 51 is driven by 57. As a result, in the second engine cooling mode, the pressure in the evaporator 56 becomes lower than that in the first engine cooling mode and the first hybrid cooling mode described above (see FIG. 2).

<Second hybrid cooling mode>
In the second hybrid cooling mode, the control device 7 has the organic medium along the first flow direction F1 along the first flow direction F1 as shown by the thick arrow in FIG. 3D, similarly to the first hybrid cooling mode described above. , The first circulation flow path composed of the battery container 55, the evaporator 56, the compression expander 51, and the condenser 52 in this order, and the second pump 61, the evaporator 56, the compression expander 51, and the condenser 52. The Rankine cycle circuit 5 is operated so that the organic medium circulates along the second circulation flow path formed in order and the two circulation flow paths. As a result, in the second hybrid cooling mode, as shown in FIG. 4D, a heat cycle qualitatively similar to that in the first hybrid cooling mode is realized.

As described with reference to FIG. 2, the control device 7 is the first hybrid when the battery 81 is in the battery cooling required state and the cooling water temperature is equal to or higher than the waste heat recovery temperature and lower than the engine protection temperature. The cooling mode is executed, and when the battery 81 is in the battery cooling required state, the cooling water temperature is equal to or higher than the engine protection temperature, and the engine 2 and its cooling water need to be cooled promptly, the second hybrid cooling mode is executed. To do. Therefore, in the second hybrid cooling mode, the control device 7 puts the motor generator 57 in a no-load state or supplies the electric power of the battery 81 to the motor generator 57 so that the cooling water can be cooled quickly. The compression expander 51 is driven by 57. As a result, in the second hybrid cooling mode, the pressure in the evaporator 56 becomes lower than that in the first engine cooling mode and the first hybrid cooling mode described above (see FIG. 2).

According to the thermal cycle system 1 of the present embodiment, the following effects are obtained.
(1) The thermal cycle system 1 includes a cooling circuit 3 in which cooling water that exchanges heat with the engine 2 and its exhaust is circulated, and a Rankine cycle circuit 5 in which an insulating organic medium circulates. The main circulation flow path 50 of the Rankine cycle circuit 5 is provided with a compression expander 51, a condenser 52, and a first pump 53 in order along the first flow direction F1. Further, in the main circulation flow path 50, the evaporator 56 that exchanges heat between the organic medium and the cooling water and the organic medium pass through the inside between the first pump 53 and the compression expander 51. A flow battery container 55 is provided, and a battery 81 is provided inside the battery container 55 so as to be immersed in an organic medium. In this heat cycle system 1, a part of the heat energy obtained by heat exchange with the cooling water of the engine 2 in the evaporator 56 by circulating the organic medium along the first flow direction F1 and the battery container In 55, a part of the heat energy obtained by heat exchange with the battery 81 can be released to the outside air to cool the engine 2 and the battery 81. In particular, in the thermal cycle system 1, by providing the battery 81 in the battery container 55 so as to be immersed in the insulating organic medium, heat can be directly exchanged between the battery 81 and the organic medium. The 81 can be cooled evenly and effectively. As described above, according to the thermal cycle system 1, the battery 81 can be effectively cooled by the Rankine cycle circuit 5 that can exchange heat with the cooling water of the engine 2.

(2) In the thermal cycle system 1, the battery container 55 accommodating the battery 81 and the evaporator 56 are provided in the main circulation flow path 50 in order along the first flow direction F1. Therefore, according to the thermal cycle system 1, the battery 81 having a lower temperature zone can be cooled before the cooling water of the engine 2, so that both the battery 81 and the engine 2 can be effectively cooled. Further, in the thermal cycle system 1, among the main circulation flow paths 50, between the condenser 52 and the first pump 53 and between the battery container 55 and the evaporator 56 are connected by a bypass flow path 60, and the bypass flow path 60 is connected. A second pump 61 for compressing the organic medium flowing along the first flow direction F1 is provided. Therefore, according to the thermal cycle system 1, the amount of the organic medium flowing into the evaporator 56 via the battery vessel 55 and the evaporator bypassing the battery vessel 55 by adjusting the rotation speed of the second pump 61. Since the amount of the organic medium flowing into the 56 can be adjusted, the temperature of the battery 81 and the temperature of the engine 2 can be adjusted with high accuracy.

(3) The thermal cycle system 1 includes a cooling circuit 3 in which cooling water that exchanges heat with the engine 2 and its exhaust is circulated, and a Rankine cycle circuit 5 in which an insulating organic medium circulates. The main circulation flow path 50 of the Rankine cycle circuit 5 is provided with an electronic expansion valve 54, a condenser 52, and a compression expander 51 in this order along the second flow direction F2. Further, in the main circulation flow path 50, the evaporator 56 that exchanges heat between the organic medium and the cooling water and the organic medium pass through the inside between the compression expander 51 and the electronic expansion valve 54. A flowing battery container 55 is provided, and a battery 81 is provided inside the battery container 55 so as to be immersed in an organic medium. In this heat cycle system 1, a part of the heat energy obtained by heat exchange with the outside air in the condenser 52 is given to the battery 81 by circulating the organic medium along the second flow direction F2, and the battery 81 can be heated. In particular, in the thermal cycle system 1, by providing the battery 81 in the battery container 55 so as to be immersed in the insulating organic medium, heat can be directly exchanged between the battery 81 and the organic medium. The 81 can be heated evenly and effectively. As described above, according to the thermal cycle system 1, the battery 81 can be effectively heated by the Rankine cycle circuit 5 that can exchange heat with the cooling water of the engine 2.

(4) In the thermal cycle system 1, a compression expander 51 for compressing the organic medium along the second flow direction F2 and depressurizing the organic medium along the first flow direction F1 is provided in the main circulation flow path 50. .. Further, in the main circulation flow path, an electron expansion valve 54 for reducing the pressure of the organic medium along the second flow direction F2 and a first pump 53 for compressing the organic medium along the first flow direction F1 are provided in parallel. .. In this heat cycle system 1, the compression expander 51 functions as a compressor, and the organic medium is circulated along the second flow direction F2. As described above, the heat exchange with the outside air in the condenser 52 is obtained. A part of the heat energy generated can be given to the battery 81 to heat the battery 81. Further, in this heat cycle system 1, the compression expander 51 functions as an expander, and the organic medium is circulated along the first flow direction F1 to obtain the heat exchange with the cooling water in the evaporator 56. A part of the heat energy and a part of the heat energy obtained by heat exchange with the battery 81 in the battery container 55 can be released to the outside air to cool the engine 2 and the battery 81. As described above, according to the thermal cycle system 1, the Rankine cycle circuit 5 can effectively control both the temperature of the engine 2 and the temperature of the battery 81.

(5) In the thermal cycle system 1, the battery container 55 accommodating the battery 81 and the evaporator 56 are provided in the main circulation flow path 50 in order along the second flow direction F2. Therefore, according to the thermal cycle system 1, by circulating the organic medium along the first flow direction F1, the battery 81 in the battery container 55 and the cooling water of the engine 2 can be cooled in this order. In a vehicle equipped with the battery 81 and the engine 2, the temperature range of the engine 2 is often higher than that of the battery 81. Therefore, in the thermal cycle system 1, the battery 81 having a lower temperature zone can be cooled before the cooling water of the engine 2, so that both the battery 81 and the engine 2 can be effectively cooled. Further, in the thermal cycle system 1, among the main circulation flow paths 50, between the condenser 52 and the electronic expansion valve 54 and between the battery container 55 and the evaporator 56 are connected by a bypass flow path 60, and the bypass flow path 60 is connected. A second pump 61 for compressing the organic medium flowing along the first flow direction F1 is provided. Therefore, according to the thermal cycle system 1, the amount of the organic medium flowing into the evaporator 56 via the battery vessel 55 and the evaporator bypassing the battery vessel 55 by adjusting the rotation speed of the second pump 61. Since the amount of the organic medium flowing into the 56 can be adjusted, the temperature of the battery 81 and the temperature of the engine 2 can be adjusted with high accuracy.

(6) The thermal cycle system 1 further includes a motor generator 57 connected to the compression expander 51. Thereby, the pressure of the organic medium in the battery container 55 can be controlled so that effective heat exchange is performed between the organic medium and the battery 81 in the battery container 55. Further, when the organic medium is circulated along the first flow direction F1 to cool the cooling water of the battery 81 and the engine 2, the motor generator 57 functions as a generator to partially dissipate the waste heat of the battery 81. And a part of the waste heat of the engine 2 can be recovered as electric energy.

Although one embodiment of the present invention has been described above, the present invention is not limited to this. Within the scope of the gist of the present invention, the detailed configuration may be changed as appropriate.

1 ... Thermal cycle system 2 ... Engine (internal combustion engine)
3 ... Cooling circuit 5 ... Rankine cycle circuit 50 ... Main circulation flow path 51 ... Compression expander (expander, compressor)
52 ... Condenser (1st heat exchanger)
53 ... 1st pump 54 ... Electronic expansion valve (expansion valve)
55 ... Battery container (container)
56 ... Evaporator (second heat exchanger)
57 ... Motor generator 60 ... Bypass flow path 61 ... Second pump 7 ... Control device 81 ... Battery (power storage device)

The present invention relates to a thermal cycle system. More particularly, to a heat cycle system including a run-Kin cycle circuit.

The present invention aims to provide a thermal cycling system that can adjust the temperature of the battery by run-Kin cycle circuit.

(1) heat cycle system according to the present invention (e.g., thermodynamic cycle system 1 described later) includes a Rankine cycle circuit insulation of the organic medium is circulated (e.g., below the Rankine cycle circuit 5), wherein the Rankine Cycle In the circulation flow path of the circuit (for example, the main circulation flow path 50 described later), in order along the first flow direction (for example, the first flow direction F1 described later), along the first flow direction. An expander that depressurizes the flowing organic medium (for example, a compression expander 51 described later), a first heat exchanger that exchanges heat between the organic medium and the outside air (for example, a condenser 52 described later), and the first A first pump (for example, a first pump 53 described later) for compressing an organic medium flowing along the flow direction of 1 is provided, and is provided between the first pump and the expander in the circulation flow path. Is provided with a container through which an organic medium flows (for example, a battery container 55 described later ), and a power storage device (for example, a battery 81 described later ) is provided in the container so as to be immersed in the organic medium. It is characterized by being.

(2) In this case, the internal combustion engine (for example, the engine 2 described later) and a cooling circuit (for example, the cooling circuit 3 described later) for circulating the cooling water that exchanges heat with the exhaust thereof are further provided, and the circulation flow path is provided. , The second heat exchanger (for example, the evaporator 56 described later) that exchanges heat between the container and the cooling water of the organic medium and the cooling circuit in order along the first flow direction. The Rankine cycle circuit is provided, and the Rankine cycle circuit is a bypass flow path (for example,) that connects between the first heat exchanger and the first pump and between the container and the second heat exchanger in the circulation flow path. The bypass flow path 60) described later is provided, and the bypass flow path is provided with a second pump (for example, the second pump 61 described later) for compressing the organic medium flowing along the first flow direction. Is preferable.

(3) heat cycle system according to the present invention (e.g., below the thermodynamic cycle system 1) includes a Rankine cycle circuit insulation of the organic medium is circulated (e.g., Rankine cycle circuit 5 to be described later), the Rankine cycle In the circulation flow path of the circuit (for example, the main circulation flow path 50 described later), in order along the second flow direction (for example, the second flow direction F2 described later), along the second flow direction. An expansion valve for reducing the pressure of the flowing organic medium (for example, an electronic expansion valve 54 described later), a first heat exchanger for heat exchange between the organic medium and the outside air (for example, a condenser 52 described later), and the first a compressor for compressing the organic medium flowing along the second direction (e.g., the compression-expansion machine 51 will be described later) and, is provided between the compressor of the circulation flow path and the expansion valve, interior container organic medium flowing in its (e.g., a battery container 55 will be described later) is provided, the electric storage device as is in the container is immersed in an organic medium (e.g., below the battery 81) is provided It is characterized by being.

(5) In this case, a cooling circuit (for example, a cooling circuit 3 described later) for circulating the cooling water that exchanges heat with the internal combustion engine and its exhaust is further provided, and the circulation flow path is provided in the first flow direction. Along the way, the container and a second heat exchanger (for example, an evaporator 56 described later) that exchanges heat between the organic medium and the cooling water of the cooling circuit are provided, and the Rankine cycle circuit is provided. The circulation flow path includes a bypass flow path (for example, a bypass flow path 60 described later) that connects between the first heat exchanger and the expansion valve and between the container and the second heat exchanger. It is preferable that the bypass flow path is provided with a second pump (for example, a second pump 61 described later) that compresses the organic medium flowing along the first flow direction.

(1) heat cycle system of the present invention comprises a Rankine cycle times path insulation of the organic medium is circulated. An expander, a first heat exchanger, and a first pump are provided in order along the first flow direction in the circulation flow path of the Rankine cycle circuit. Also among the circulation flow path, between the first pump and the expander, an organic medium inside of that is the container is provided for flowing, the power storage to immersed in an organic medium in the interior of the container A device is provided. In this heat cycle system, by circulating along the organic medium in the first flow direction, to release the part of the thermal energy obtained by the heat exchange with the power storage device in container outside air, a charge reservoir Can be cooled. In particular, in the present invention, by providing the power storage device in the container so as to be immersed in the insulating organic medium, heat exchange can be directly performed between the power storage device and the organic medium, so that the power storage device can be evenly distributed. It can be cooled effectively. According to the heat cycle system of the present invention the above, it is possible to effectively cool the power storage device by run-Kin cycle circuit.

(2) The heat cycle system of the present invention includes an internal combustion engine and a cooling circuit in which cooling water that exchanges heat with the exhaust gas circulates. Further, in the present invention, in the circulation flow path, a second heat exchanger for heat exchange between the organic medium and the cooling water between the first pump and the expander, a container for accommodating the power storage device, and a container. Is provided. Therefore, in this heat cycle system, by circulating the organic medium along the first flow direction, a part of the heat energy obtained by heat exchange with the cooling water of the internal combustion engine in the second heat exchanger and a container. In, a part of the heat energy obtained by heat exchange with the power storage device can be released to the outside air to cool the internal combustion engine and the power storage device. Further, in the present invention, a container accommodating the power storage device and a second heat exchanger are provided in the circulation flow path in order along the first flow direction. Therefore, according to the present invention, since the power storage device having a lower temperature zone can be cooled before the cooling water of the internal combustion engine as described above, both the power storage device and the internal combustion engine can be effectively cooled. Further, in the present invention, the circulation flow path between the first heat exchanger and the first pump and the container and the second heat exchanger are connected by a bypass flow path, and the first flow direction is connected to the bypass flow path. A second pump is provided to compress the organic medium flowing along. Therefore, according to the present invention, by adjusting the rotation speed of the second pump, the amount of the organic medium that flows into the second heat exchanger via the container and the amount of the organic medium that bypasses the container and flows into the second heat exchanger. Since the amount of the organic medium to be generated can be adjusted, the temperature of the power storage device and the temperature of the internal combustion engine can be adjusted with high accuracy.

(3) heat cycle system of the present invention comprises a Rankine cycle times path insulation of the organic medium is circulated. The circulation flow path of the Rankine cycle circuit is provided with an expansion valve, a first heat exchanger, and a compressor in order along the second flow direction. Also within this circulation passage, between the compressor and the expansion valve, an organic medium inside of that is the container is provided for flowing, the power storage device as the interior of the container is immersed in an organic medium Is provided. In this heat cycle system, by circulating the organic medium along the second flow direction, a part of the heat energy obtained by heat exchange with the outside air in the first heat exchanger is given to the power storage device, and the power storage device Can be heated. In particular, in the present invention, by providing the power storage device in the container so as to be immersed in the insulating organic medium, heat exchange can be directly performed between the power storage device and the organic medium, so that the power storage device is evenly distributed. It can be heated effectively. According to the heat cycle system of the present invention the above, it is possible to effectively heat the power storage device by run-Kin cycle circuit.

(4) In the present invention, the circulation flow path is provided with a compression / expansion machine that compresses the organic medium along the second flow direction and depressurizes the organic medium along the first flow direction. Further, in the circulation flow path, an expansion valve for reducing the pressure of the organic medium along the second flow direction and a first pump for compressing the organic medium along the first flow direction are provided in parallel. In this heat cycle system, the compressor is made to function as a compressor, and the organic medium is circulated along the second flow direction. As described above, it is obtained by heat exchange with the outside air in the first heat exchanger. A part of the heat energy can be given to the power storage device to heat the power storage device. In this heat cycle system, a compressor expander to function as an expander, by circulating the organic medium along a first flow direction, the thermal energy obtained by the heat exchange with the power storage device in the container one part is released to the outside air can cool the charge reservoir. According to the heat cycle system of the present invention the above, it is possible to effectively adjust the temperature of the charge reservoir by the Rankine cycle circuit.

(5) The thermal cycle system of the present invention includes an internal combustion engine and a cooling circuit for circulating cooling water that exchanges heat with its exhaust gas. Further, in the present invention, in the circulation flow path, a second heat exchanger for heat exchange between the organic medium and the cooling water between the first pump and the expander, a container for accommodating the power storage device, and a container. Is provided. Therefore, in this heat cycle system, the compression expander functions as an expander, and the organic medium is circulated along the first flow direction, so that the heat obtained by heat exchange with the cooling water in the second heat exchanger is obtained. A part of the energy and a part of the heat energy obtained by heat exchange with the power storage device in the container can be released to the outside air to cool the internal combustion engine and the power storage device. Further, in the present invention, a container accommodating the power storage device and a second heat exchanger are provided in the circulation flow path in order along the second flow direction. Therefore, according to the present invention, by circulating the organic medium along the first flow direction, the power storage device in the container and the cooling water of the internal combustion engine can be cooled in this order. In a vehicle equipped with a power storage device and an internal combustion engine, the temperature range of the internal combustion engine is often higher than that of the power storage device. Therefore, in the present invention, since the power storage device having a lower temperature zone can be cooled before the cooling water of the internal combustion engine, both the power storage device and the internal combustion engine can be effectively cooled. Further, in the present invention, the circulation flow path between the first heat exchanger and the expansion valve and the container and the second heat exchanger are connected by a bypass flow path, and the bypass flow path is connected to the bypass flow path in the first flow direction. A second pump is provided to compress the organic medium flowing along. Therefore, according to the present invention, by adjusting the rotation speed of the second pump, the amount of the organic medium that flows into the second heat exchanger via the container and the amount of the organic medium that bypasses the container and flows into the second heat exchanger. Since the amount of the organic medium to be generated can be adjusted, the temperature of the power storage device and the temperature of the internal combustion engine can be adjusted with high accuracy.

Claims (7)

A thermal cycle system including a cooling circuit in which cooling water that exchanges heat with an internal combustion engine and its exhaust circulates, and a Rankine cycle circuit in which an insulating organic medium circulates.
In the circulation flow path of the Rankine cycle circuit, heat exchange between the organic medium and the outside air is performed by an expander that depressurizes the organic medium flowing along the first flow direction in order along the first flow direction. A first heat exchanger for performing the above and a first pump for compressing the organic medium flowing along the first flow direction are provided.
In the circulation flow path, between the first pump and the expander, heat exchange is performed between the container through which the organic medium flows and the organic medium and the cooling water of the cooling circuit. 2 heat exchangers and
A thermodynamic cycle system characterized in that a power storage device is provided in the container so as to be immersed in an organic medium. The container and the second heat exchanger are provided in the circulation flow path in order along the first flow direction.
The Rankine cycle circuit includes a bypass flow path that connects between the first heat exchanger and the first pump and between the container and the second heat exchanger in the circulation flow path.
The thermal cycle system according to claim 1, wherein the bypass flow path is provided with a second pump for compressing an organic medium flowing along the first flow direction. A thermal cycle system including a cooling circuit in which cooling water that exchanges heat with an internal combustion engine and its exhaust circulates, and a Rankine cycle circuit in which an insulating organic medium circulates.
In the circulation flow path of the Rankine cycle circuit, an expansion valve for reducing the pressure of the organic medium flowing along the second flow direction in order along the second flow direction, and heat exchange between the organic medium and the outside air. A first heat exchanger for performing the above and a compressor for compressing the organic medium flowing along the second flow direction are provided.
A second heat exchanger that exchanges heat between the organic medium and the cooling water of the cooling circuit, and the organic medium pass through the inside of the circulation flow path between the compressor and the expansion valve. A container for flowing water is provided,
A thermodynamic cycle system characterized in that a power storage device is provided in the container so as to be immersed in an organic medium. The compressor is a compression / expansion machine that compresses an organic medium flowing along the second flow direction and depressurizes the organic medium flowing along the first flow direction opposite to the second flow direction. ,
The thermal cycle according to claim 3, wherein the expansion valve and a first pump for compressing an organic medium flowing along the first flow direction are provided in parallel in the circulation flow path. system. The container and the second heat exchanger are provided in the circulation flow path in order along the first flow direction.
The Rankine cycle circuit includes a bypass flow path that connects between the first heat exchanger and the expansion valve and between the container and the second heat exchanger in the circulation flow path.
The thermal cycle system according to claim 4, wherein the bypass flow path is provided with a second pump for compressing an organic medium flowing along the first flow direction. The thermal cycle system according to claim 1 or 2, further comprising a motor generator connected to the expander. The thermal cycle system according to claim 4 or 5, further comprising a motor generator connected to the compression expander.

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