JP2019211104A - Heat exchange device - Google Patents

Abstract

To provide a heat exchange device that can adjust heat exchange efficiency.SOLUTION: A heat exchange device 1 comprises a heat exchanger inside which a heat medium flows, a fluid transport device for passing the heat medium through the heat exchanger, and a flow passage 20 connecting the heat exchanger and the fluid transport device, and through which the heat medium flows. The heat exchange device 1 comprises a flow velocity adjustment device 50 provided in the flow passage 20, and for increasing/decreasing a flow velocity of the heat medium flowing through the flow passage 20 by using an opening/closing valve 51. The opening/closing valve 51 comprises a valve element 57 for changing an amount of the heat medium flowing through the flow passage 20 by rotating, and a valve element driving part 60 for moving the valve element 57 in a radial direction of a rotating shaft of the opening/closing valve 51. Thus, the valve element driving part 60 can adjust an amount of cooling water flowing through the heat exchanger by moving a position of the valve element 57. Therefore, the heat exchange device capable of adjusting heat exchange efficiency can be obtained.SELECTED DRAWING: Figure 3

Description

  The disclosure in this specification relates to a heat exchange device.

  Patent document 1 is disclosing the heat exchanger which caused the turbulent flow by pulsating the fluid which performs heat exchange, and raised the heat exchange efficiency. The motor control unit that controls the drive motor of the pump generates pulsation in the heat medium by changing and controlling the rotation speed of the drive motor.

  Patent Document 2 includes two pumps in a heat transport system for the purpose of pulsating a heat medium, and controls these pumps to generate a pulsating flow.

JP 2006-217564 A Japanese Patent Laid-Open No. 2015-45478

  In the configuration of the prior art, the pump drive motor is changed and controlled at various rotational speeds in order to generate a pulsating flow. Alternatively, a plurality of pumps are provided in order to generate a pulsating flow, and the drive motors of these pumps are changed and controlled at different rotational speeds. In these cases, complex control is required to generate the pulsating flow. In addition, a complicated configuration such as control wiring is required to generate a pulsating flow. In view of the above or other aspects not mentioned, there is a need for further improvements in heat exchange devices.

  One disclosed object is to provide a heat exchange device capable of adjusting the heat exchange efficiency.

  The heat exchange device disclosed herein includes a heat exchanger (31, 32) through which a heat medium flows, a fluid transport device (7) that causes the heat medium to flow through the heat exchanger, a heat exchanger, and a fluid transport device. A flow path (20) through which the heat medium flows, and a flow rate adjusting device (50) that is provided in the flow path and increases or decreases the flow speed of the heat medium that flows through the flow path using the on-off valve (51). The on-off valve has a valve body (57) that changes the amount of the heat medium that flows through the flow path by rotating, and a valve body drive unit (60, 260, that moves the valve body in the radial direction of the rotation shaft of the on-off valve). 360).

  According to the disclosed heat exchanging device, the valve body driving unit is provided that moves the valve body that changes the amount of the heat medium flowing through the flow path in the radial direction of the rotation shaft of the on-off valve. For this reason, the flow rate of the heat medium which flows through a heat exchanger can be adjusted because a valve body drive part switches the position of a valve body between the position which restrict | limits the quantity of a heat medium, and the position which does not restrict | limit. In other words, the mode of the flow rate adjusting device can be switched between a mode in which the flow rate of the heat medium sent from the fluid transport device is likely to change and a mode in which the flow rate is less likely to change. Therefore, a heat exchange device capable of adjusting the heat exchange efficiency can be provided.

  The disclosed embodiments of the present specification employ different technical means to achieve each purpose. The reference numerals in parentheses described in the claims and this section exemplify the correspondence with the embodiments described later, and are not intended to limit the technical scope. The objects, features, and advantages disclosed in this specification will become more apparent with reference to the following detailed description and accompanying drawings.

It is a block diagram which shows a heat exchange apparatus. It is an exploded view showing a flow rate adjusting device. It is sectional drawing which shows the flow-rate adjustment apparatus of pulsation flow mode. It is a cross-sectional block diagram which shows the flow-rate adjustment apparatus of a pulsating flow mode. It is a cross-sectional block diagram which shows the flow-rate adjustment apparatus of a pulsating flow mode. It is a cross-sectional block diagram which shows the flow-rate adjustment apparatus of a steady flow mode. It is a cross-sectional block diagram which shows the flow-rate adjustment apparatus of the pulsating flow mode in 2nd Embodiment. It is a section lineblock diagram showing the flow rate adjustment device of the steady flow mode in a 2nd embodiment. It is sectional drawing which shows the flow-rate adjustment apparatus of the pulsating flow mode in 3rd Embodiment. It is a section lineblock diagram showing the flow rate adjustment device of the pulsating flow mode in a 4th embodiment. It is a section lineblock diagram showing the flow rate adjustment device of the pulsating flow mode in a 4th embodiment. It is a cross-sectional block diagram which shows the flow-rate adjustment apparatus of the steady flow mode in 4th Embodiment. It is a cross-sectional block diagram which shows the flow-rate adjustment apparatus of the steady flow mode in 4th Embodiment.

  A plurality of embodiments will be described with reference to the drawings. In embodiments, functionally and / or structurally corresponding parts and / or associated parts may be assigned the same reference signs or reference signs that differ by more than a hundred. For the corresponding parts and / or associated parts, the description of other embodiments can be referred to.

1st Embodiment The heat exchange apparatus 1 can be used as a cooling device mounted in a vehicle and cooling the heat-emitting components of the vehicle. For example, in an electric vehicle, a hybrid vehicle, etc., it can be used for a low-temperature radiator or the like that cools heat-generating components by circulating cooling water inside the heat exchange device 1. In this case, examples of the heat generating component include a battery pack, a drive motor, an inverter, and a power control unit. In particular, when the heat generating component is a battery pack, the battery pack can be efficiently cooled by the heat exchanging device 1 to reduce the deterioration of the battery due to the temperature rise of the battery pack. In other words, the deterioration of the battery can be suppressed and the performance of the battery pack can be stably exhibited over a long period of time. Or it can suppress that it falls below the minimum temperature which can use a battery by performing efficient heating of a battery pack rather than circulating a heat medium with a high temperature to heat exchanging device 1. In other words, the battery pack can be used within an appropriate temperature range.

  Further, in an engine-driven vehicle, engine cooling water can be circulated inside the heat exchange device 1 to cool heat-generating components such as the engine. Alternatively, it can also be used in a vehicle air conditioner that exchanges heat between engine cooling water heated by the engine and air to send warm air into the vehicle. However, the heat exchange device 1 can be widely applied to devices that perform heat exchange, such as a home air conditioner and a server cooling device, in addition to a use mounted on a vehicle. Cooling water and engine cooling water provide a heat medium.

  In FIG. 1, the heat exchange device 1 includes a radiator (RAD) 3, a pump 7, a flow rate adjusting device 50, a first heat exchange unit 31, and a second heat exchange unit 32. The heat exchange device 1 has a flow path 20 through which cooling water circulates by connecting the components. The flow path 20 includes a common flow path 25, a first flow path 21, and a second flow path 22. A first heat exchange unit 31 is provided in the first flow path 21. A second heat exchange unit 32 is provided in the second flow path 22.

  The radiator 3 is a device that exchanges heat between cooling water flowing inside and fluid such as air flowing on the surface of the radiator 3. In the radiator 3, a plurality of fins are provided around the pipe through which the cooling water flows in order to increase the surface area of the radiator 3 and increase the heat exchange efficiency. When the heat exchange device 1 is mounted on the vehicle, the heat exchange is promoted by the radiator 3 receiving the traveling wind of the vehicle.

  The pump 7 is a water pump whose output can be controlled. The pump 7 is, for example, an electric water pump that performs output control electrically. The pump 7 is a device that functions as a power source for circulating cooling water through the flow path 20. The pump 7 sends out cooling water at a constant flow rate and circulates it. In other words, the pump 7 circulates the cooling water through the flow path 20 as a steady flow. The pump 7 provides a fluid transport device. However, the heat exchange device 1 is not limited to a device that performs heat exchange using a liquid such as cooling water, and may be a device that performs heat exchange by circulating a gas such as air. In this case, a blower or the like can be used as the fluid transport device.

  In the flow path 20, a flow velocity adjusting device 50 is provided at a connection point where the common flow path 25 branches into the first flow path 21 and the second flow path 22. Details of the flow rate adjusting device 50 will be described later. The flow rate adjusting device 50 has a function of periodically decelerating the flow of the cooling water sent from the pump 7 in a steady flow and repeatedly generating the flow rate. In other words, the flow velocity adjusting device 50 has a pulsating flow generation function that converts cooling water flowing in a steady flow into a pulsating flow. The flow rate adjusting device 50 has a flow path switching function for switching which one of the two paths of the first flow path 21 and the second flow path 22 flows the cooling water and which does not flow the cooling water. The flow rate adjusting device 50 can switch between two modes: a pulsating flow mode in which the flow of the cooling water is converted into a pulsating flow and a steady flow mode in which the steady flow sent by the pump 7 flows. The pulsating flow mode is a mode in which the flow rate of the cooling water is likely to fluctuate. The steady flow mode is a mode in which the flow rate of the cooling water is less likely to fluctuate than the pulsating flow mode.

  The 1st heat exchange part 31 and the 2nd heat exchange part 32 comprise one heat exchanger. The heat exchanger is a multi-flow type heat exchanger formed by arranging a plurality of refrigerant pipes in parallel between two headers. The heat exchanger includes a core portion having a corrugated fin disposed between a flat flat tube and a flat tube having a small flow area of a pipe serving as a cooling water path. The heat exchanger is not limited to a multiflow type heat exchanger. For example, a fin tube type heat exchanger or a serpentine type heat exchanger may be used. In a heat exchanger such as a fin tube type, inner fins that increase the contact area with the cooling water may be formed inside the piping through which the cooling water circulates. Further, the first heat exchange unit 31 and the second heat exchange unit 32 do not constitute one heat exchanger, but the first heat exchange unit 31 and the second heat exchange unit 32 include two independent heat exchangers. You may make it comprise a heat exchanger.

  The heat exchanging device 1 can be used as a cooling device for cooling the heat generating components by circulating cooling water having a temperature lower than that of the heat generating components. That is, the cooling water is cooled by the radiator 3 and the low-temperature cooling water is circulated through the first heat exchanging unit 31 and the second heat exchanging unit 32, thereby cooling the heat generating components. On the other hand, by circulating a heat medium having a temperature higher than that of the heat generating component, it can be used as a heating device for heating the heat generating component. That is, the heating medium is heated by replacing the radiator 3 with a heater or the like, and the heated heating medium is circulated to the first heat exchanging unit 31 and the second heat exchanging unit 32 to heat the heat generating component. To do.

  The flow of the cooling water in the heat exchange device 1 will be described below by taking the case of flowing through the first flow path 21 as an example. The cooling water sent from the pump 7 flows through the common flow path 25 and flows into the flow velocity adjusting device 50. In the flow rate adjusting device 50 in the pulsating flow mode, the flow rates of the cooling water flowing out toward the first flow path 21 and the second flow path 22 are increased or decreased at different phases and in the same cycle. For example, when the flow rate adjusting device 50 opens the first flow path 21 and closes the second flow path 22, the cooling water flows vigorously through the first flow path 21. Does not flow cooling water. In addition, when both the first flow path 21 and the second flow path 22 are opened by the flow rate adjusting device 50, the same amount is uniformly applied to the first flow path 21 and the second flow path 22. Cooling water flows in. Here, in a pulsating flow that repeatedly increases and decreases periodically, the time during which the flow rate increases and the time during which the flow rate decreases are the same length, including the time during which the flow rate does not increase or decrease. The cycle will be repeated regularly. However, the flow rate adjusting device 50 may be configured so as not to include a time during which the flow rate does not increase or decrease.

  The cooling water that has flowed into the first flow path 21 flows through the first heat exchanging section 31 and performs heat exchange to cool the heat generating components. The first heat exchange unit 31 is in contact with, for example, a battery pack that is a heat-generating component, and the battery pack is directly cooled by the cooling water flowing inside the first heat exchange unit 31. Alternatively, the first heat exchange unit 31 is provided in an air path through which the wind flows toward the battery pack, and the wind is cooled by the cooling water flowing inside the first heat exchange unit 31. The cooled wind is blown onto the battery pack, whereby the battery pack is cooled. However, the method of cooling the heat generating component by the first heat exchanging unit 31 is not limited to the above-described method, and the heat generating component to be cooled is not limited to the battery pack.

  The cooling water that has flowed out of the flow rate adjustment device 50 in the pulsating flow mode flows into the first heat exchange unit 31 in a pulsating flow state in which the flow rate periodically increases and decreases. The cooling water that has flowed into the first heat exchanging section 31 in a pulsating state tends to flow as a turbulent flow rather than a laminar flow. That is, it is not a laminar flow that regularly moves on streamlines, but tends to flow as a turbulent flow that moves irregularly in time and space. When the flow turbulence increases, as in turbulent flow, the cooling water that exchanges heat with the piping moves away from the piping, and the cooling water that does not exchange heat with the piping easily moves closer to the piping to transfer heat. Is promoted. In other words, the heat transfer efficiency is improved because the heat distribution of the cooling water flowing through the pipe tends to be uniform regardless of the distance from the pipe. Therefore, the heat exchange efficiency in the 1st heat exchange part 31 can be improved by flowing cooling water in the state of a pulsating flow.

  When the cooling performance and the cooling target are different between the first heat exchanging unit 31 and the second heat exchanging unit 32, the temperature of the cooling water that has flowed out of the first flow path 21 and the cooling water that has flowed out of the second flow path 22 are used. The temperature may vary greatly. The cooling water that has flowed through the first heat exchange unit 31 joins and mixes with the cooling water that has flowed through the second heat exchange unit 32, and the temperature becomes substantially uniform. At this time, the cooling water that has been flowing in the state of the pulsating flow is complicatedly overlapped, so that the flow of the cooling water becomes closer to a steady flow than before the merge. Thereafter, the cooling water flows into the radiator 3 in a state approaching a steady flow.

  In the radiator 3, the cooling water heated by the heat exchange with the heat-generating component and the temperature thereof is increased is exchanged with the air around the radiator 3. Thereby, the cooling water is cooled so as to approach the temperature of the air around the radiator 3. After being cooled by the radiator 3, the cooling water is sucked into the pump 7 and circulates again through the flow path 20 to repeat a series of operations as the heat exchange device 1.

  In FIG. 2, the flow velocity adjusting device 50 includes a case 29 and an opening / closing valve 51. The case 29 includes a connection port that forms part of the common flow path 25, a connection port that forms part of the first flow path 21, and a connection port that forms part of the second flow path 22. The first flow path 21 and the second flow path 22 face each other in the case 29. The common flow path 25 and the first flow path 21 are orthogonal to each other in the case 29. The common flow path 25 and the second flow path 22 are orthogonal to each other in the case 29. The case 29 is provided with a concave shape for accommodating the on-off valve 51 therein. The on-off valve 51 is housed in a concave shape in the center portion of the case 29. The on-off valve 51 is a valve device that adjusts the opening degree of the first flow path 21 and the second flow path 22 that form part of the flow path 20 to adjust the amount of cooling water flowing into each path. The on-off valve 51 is a rotary valve that switches between opening and closing by rotating.

  The on-off valve 51 includes a valve body 57 for opening and closing the opening of the first flow path 21 and the opening of the second flow path 22. The on-off valve 51 includes an upper surface portion 53 that forms the upper surface of the on-off valve 51 and a lower surface portion 55 that forms the lower surface. The valve body 57, the upper surface portion 53, and the lower surface portion 55 are portions constituting the on-off valve 51 and are rotatably provided as an integrated on-off valve 51. The valve body 57 is a plate member having an arc shape in cross section. In a state where the on-off valve 51 is properly stored in the case 29, the valve body 57 comes into contact with the disk-shaped lower surface portion 55.

  The on-off valve 51 includes a rotation driving unit 54 that rotationally drives the on-off valve 51. The rotation drive unit 54 is located at the center of the disk-shaped upper surface part 53. The on-off valve 51 includes a rotation shaft portion 59 in which the rotation shaft of the rotation drive unit 54 and the rotation shaft of the valve body 57 are coaxial. The on-off valve 51 includes a valve body driving unit 60 that functions as a moving unit that moves the valve body 57. The valve body drive unit 60 moves the position of the valve body 57 so that the flow rate adjusting device 50 converts the cooling water into a pulsating flow and flows the pulsating flow mode, and the steady flow that flows in the steady flow sent by the pump 7. It is a device that switches between modes. In a state where the on-off valve 51 is properly housed in the case 29, the valve body driving unit 60 is wound between the upper surface portion 53 and the lower surface portion 55 while being wound around the cylindrical rotating shaft portion 59. Will be located.

  The valve body driving unit 60 is formed by winding a shape memory alloy plate member in a spiral shape. The shape memory alloy is, for example, an alloy of titanium and nickel, or an alloy containing iron as a main component and mixed with manganese and silicon. The shape memory alloy has a transformation point that is a temperature at which the arrangement of metal atoms changes. The transformation point is, for example, 65 ° C. However, the transformation point can be freely set depending on the application of the heat exchange device 1 and is not limited to the above-described temperature.

  The valve body driving unit 60 maintains the predetermined spiral shape at a temperature equal to or higher than the transformation point, and the valve body driving unit 60 is located on the inner side at a temperature lower than the transformation point compared to the predetermined spiral shape. It is formed so as to have a spiral shape shrunk. That is, at a temperature lower than the transformation point, the spiral shape is contracted inward, and when the temperature is higher than the transformation point, the original spiral shape is restored. Thereby, the outer edge part of the valve body drive part 60 which makes | forms a spiral shape moves to the direction away from the center part of a vortex compared with the state of the temperature below a transformation point. That is, the outer diameter of the valve body drive unit 60 at or above the transformation point at which the flow velocity adjusting device 50 is in the pulsating flow mode is larger than the outer diameter of the valve body drive unit 60 below the transformation point at which the steady flow mode is entered.

  The rotation drive unit 54 has four blades that are angled with respect to the direction in which the cooling water flows. In other words, the rotation drive unit 54 is a rotating body having a shape in which blades are spirally formed around the rotation axis of the on-off valve 51. In other words, the rotation drive unit 54 has a water wheel structure. The rotation drive unit 54 receives fluid energy that is the force of the flow of cooling water that flows through the on-off valve 51 and rotates the valve body 57 that is integral with the rotation drive unit 54. That is, when the cooling water flows fast, the rotation drive unit 54 rotates fast, and the valve body 57 connected integrally with the rotation drive unit 54 also rotates fast. On the other hand, when the cooling water flows slowly, the rotation drive unit 54 rotates slowly, and the valve body 57 connected integrally with the rotation drive unit 54 also rotates slowly. The speed at which the on-off valve 51 rotates can be controlled by the shape of the blades of the rotation drive unit 54. It is preferable to adjust the rotation of the rotation drive unit 54 so that the frequency of the pulsating flow is about 2 Hz. However, the frequency of the pulsating flow can be set to an optimum value as appropriate depending on the purpose of heat exchange, the performance of each component constituting the heat exchanger 1 as a whole.

  The case 29 is provided with a cover 45. The cover 45 covers the opening provided in the case 29 that forms a part of the flow path 20 in order to install the opening / closing valve 51 inside the flow path 20 of the cooling water to prevent leakage of the cooling water. It is a cover member. A washer is provided between the cover 45 and the on-off valve 51.

  In FIG. 3, one end of the rotating shaft portion 59 is held in a state of being inserted into a cylindrical shaft holding portion 58 provided inside the common flow path 25. The other end of the rotary shaft 59 is held in a state of being inserted into a recess provided in the cover 45.

  Since the temperature of the cooling water is higher than the predetermined temperature and the temperature of the valve body driving unit 60 exceeds the transformation point of the shape memory alloy, the valve body driving unit 60 maintains a predetermined spiral shape. The valve body driving unit 60 presses the valve body 57 toward the outside in the radial direction of the rotation shaft of the on-off valve 51. That is, the valve element 57 is pressed outward by the valve element driving unit 60 to contact the inner surface of the case 29 and close the opening of the second flow path 22. That is, the second flow path 22 is in a closed state in which cooling water cannot flow.

  The valve body 57 includes a lower end portion that is in contact with the lower surface portion 55 and an upper end portion that is an end portion opposite to the lower end portion. The valve body driving unit 60 is provided so as to contact a position closer to the upper end than the lower end of the valve body 57.

  FIG. 4 shows the closed state of the second flow path 22. Since the temperature of the cooling water is higher than the predetermined temperature and the temperature of the valve body driving unit 60 exceeds the transformation point of the shape memory alloy, the valve body driving unit 60 maintains a predetermined spiral shape. One end of the valve body driving unit 60 is wound around the bearing portion of the on-off valve 51, and the other end is connected to the valve body 57. In other words, the valve body 57 is connected to the bearing portion of the on-off valve 51 via the valve body driving unit 60.

  The second flow path 22 is closed with a valve body 57. On the other hand, the first flow path 21 is not blocked by the valve body 57 and communicates with the valve opening 56. In this state, the first flow path 21 is in an open state in which cooling water can flow, and the second flow path 22 is in a closed state in which cooling water cannot flow. The on-off valve 51 rotates in the direction of the arrow A1, so that the positions of the valve body 57 and the valve opening 56 move in the circumferential direction of the rotation shaft of the on-off valve 51.

  When the on-off valve 51 rotates in the direction of the arrow A1, the position of the valve body 57 is shifted, a part of the second flow path 22 is blocked by the valve body 57, and the remaining part of the second flow path 22 is opened. The aperture state communicates with 56. In the throttled state, the cooling water can be circulated, but the amount of the cooling water that can be circulated is smaller than that in the open state and is limited.

  In the first heat exchange section 31 connected to the first flow path 21 and the second heat exchange section 32 connected to the second flow path 22, the flow rate of the cooling water flowing inside is zero in the closed state. Yes, the flow rate is zero. On the other hand, in the open state, the flow rate of cooling water flowing through the interior is large and the flow rate is fast. In the throttled state, the flow rate of the cooling water flowing inside is smaller and the flow rate is slower than in the open state.

  FIG. 5 shows the open state of the first flow path 21 and the second flow path 22. Both the first flow path 21 and the second flow path 22 are in communication with the valve opening 56, and the cooling water can flow through the first flow path 21 and the second flow path 22 at the same time. Thereafter, the on-off valve 51 further rotates in the direction of the arrow A1, thereby closing the first flow path 21 through the throttle state. In the pulsating flow mode, the closed state and the throttle state that restrict the flow rate of the cooling water flowing through the first heat exchange unit 31 and the second heat exchange unit 32, and the first heat exchange unit 31 and the second heat exchange unit 32 flow. The valve body 57 is located at a position where switching between an open state without restricting the flow rate of the cooling water is possible.

  When the first flow path 21 is in a closed state, the second flow path 22 is in an open state. On the other hand, when the second flow path 22 is closed, the first flow path 21 is open. Therefore, when the flow rate of the cooling water flowing through the first heat exchange unit 31 is slow, the flow rate of the cooling water flowing through the second heat exchange unit 32 is fast. On the other hand, when the flow rate of the cooling water flowing through the second heat exchange unit 32 is slow, the flow rate of the cooling water flowing through the first heat exchange unit 31 is fast. That is, the first flow channel 21 and the second flow channel 22 are flowing in a state in which the flow rate increases or decreases by a half cycle and the cooling water flows in a phase opposite to each other. In other words, the first flow path 21 and the second flow path 22 are not simultaneously closed.

  The flow rate of the cooling water flowing through the first flow path 21 and the second flow path 22 is changed by repeating the three states of the closed state, the throttle state, and the open state by the flow rate adjusting device 50. For this reason, cooling water flows through the first heat exchange unit 31 and the second heat exchange unit 32 in a pulsating flow state in which the flow velocity periodically changes. Therefore, the heat exchange efficiency of the first heat exchange unit 31 and the second heat exchange unit 32 can be increased as compared with the case where the cooling water flows in a steady flow.

  FIG. 6 shows the on-off valve 51 when the temperature of the cooling water is lower than the transformation point. The valve body drive unit 60 is deformed from the original shape and contracts inward. That is, the valve body driving unit 60 moves the valve body 57 to the inside in the radial direction of the rotation shaft of the on-off valve 51. Although the valve body 57 faces the opening of the second flow path 22, a large gap is generated between the valve body 57 and the opening of the second flow path 22. For this reason, the valve body 57 cannot make the 2nd flow path 22 into a closed state. Even if the on-off valve 51 rotates and the position of the valve body 57 moves in the circumferential direction, the valve body 57 is in a state where neither the first flow path 21 nor the second flow path 22 can be closed. . In other words, the first flow path 21 and the second flow path 22 are always open regardless of the rotation of the valve body 57. That is, in the steady flow mode, the valve body 57 is located at a position where it is not possible to switch between a closed state and a throttle state where the flow rate of the cooling water is limited and an open state where the flow rate of the cooling water is not limited.

  When both the first flow path 21 and the second flow path 22 are always open, the cooling water flowing inside is in a steady flow state. For this reason, the cooling water flows through the first heat exchange unit 31 and the second heat exchange unit 32 in a steady flow state sent by the pump 7. Therefore, compared with the case where the cooling water flows in a pulsating flow, the pressure loss can be reduced and the cooling water can be circulated smoothly.

  According to the embodiment described above, the valve body drive unit 60 that moves the valve body 57 in the radial direction of the rotation shaft of the on-off valve 51 is provided. For this reason, the amount of the cooling water flowing through the first flow path 21 and the second flow path 22 can be adjusted by moving the valve body 57 in the radial direction of the rotation shaft of the on-off valve 51 as necessary. In other words, the mode of the flow velocity adjusting device 50 can be switched between the pulsating flow mode and the steady flow mode. Therefore, it is possible to reduce the power consumption of the pump 7 while ensuring the heat exchange amount necessary for the heat exchange device 1 by appropriately switching the flow of the cooling water between the pulsating flow and the steady flow. it can. In addition, it is possible to reduce the generation of vibration and sound associated with the circulation of the cooling water as compared with the case where the cooling water is always supplied in a pulsating flow state.

  In addition, when cooling water is allowed to flow in a pulsating flow state, the valve body 57 flows from the cooling water in the direction in which the valve element 57 is pushed radially outward of the rotary shaft of the on-off valve 51 at the moment when the on-off valve 51 closes the path of the cooling water. Receive physical strength. When the bearing portion of the on-off valve 51 is strongly pressed against the rotating shaft portion 59 by this fluid force, the wear of the bearing portion is likely to proceed. By properly using the pulsating flow and the steady flow, the time for the on-off valve 51 to be in the closed state and the throttled state can be shortened, and the time for the valve body 57 to receive the fluid force from the cooling water can be reduced. Therefore, wear at the bearing portion of the on-off valve 51 can be reduced, and the function of the on-off valve 51 can be stably demonstrated over a long period of time.

  The valve body drive unit 60 changes the amount of movement for moving the valve body 57 in accordance with the temperature of the cooling water that is the heat medium. For this reason, the flow rate of the cooling water can be adjusted by changing the position of the valve body 57 between when the temperature of the cooling water is high and when it is low. Therefore, appropriate heat exchange can be performed by changing the heat exchange efficiency in the first heat exchange unit 31 and the second heat exchange unit 32 according to the temperature of the cooling water.

  The valve body driving unit 60 moves the valve body 57 toward the radially outer side of the rotation shaft of the on-off valve 51 as the temperature of the cooling water as the heat medium increases, and the on-off valve 51 as the temperature of the cooling water decreases. The valve body 57 is moved toward the inside in the radial direction of the rotation shaft. In other words, in the case of a high heat load in which the temperature of the cooling water is high and the cooling water needs to be actively exchanged in the first heat exchange unit 31 or the second heat exchange unit 32, the flow of the cooling water is pulsating. The heat exchange efficiency of the first heat exchange unit 31 and the second heat exchange unit 32 is increased. On the other hand, in the case of a low heat load in which the temperature of the cooling water is low and the cooling water does not need to be actively exchanged in the first heat exchange unit 31 or the second heat exchange unit 32, the flow of the cooling water is The steady flow sent remains unchanged. Thereby, the pressure loss of the flow of the cooling water in the 1st flow path 21 and the 2nd flow path 22 is made small as needed. For this reason, the heat exchange efficiency in the 1st heat exchange part 31 or the 2nd heat exchange part 32 can be improved, so that there is much heat exchange amount required in the 1st heat exchange part 31 or the 2nd heat exchange part 32. .

  The valve body driving unit 60 is made of a shape memory alloy. For this reason, the valve body 57 can be automatically moved according to the temperature of the cooling water. Therefore, the position of the valve element 57 can be moved with a simple configuration as compared with the case where the temperature of the cooling water is measured by the sensor and the behavior of the valve element driving unit 60 is electrically controlled. Further, since the valve body driving unit 60 itself has a function of sensing the temperature of the cooling water, the number of parts of the heat exchange device 1 can be reduced.

  The valve body driving unit 60 has a spiral shape that spirals around the rotation axis of the on-off valve 51. For this reason, it is easy to ensure a large radial displacement of the on-off valve 51 on the rotating shaft. In addition, compared to a case where a deformation in which the bent state and the extended state of the valve body driving unit 60 are alternately repeated is caused, a large load is locally applied to the valve body driving unit 60. Easy to reduce. In other words, it is easy to reduce fatigue generated in the valve body driving unit 60 and stably maintain a state in which the valve body driving unit 60 functions properly over a long period of time.

  The valve body driving unit 60 having a function of sensing the temperature of the cooling water has a spiral shape. For this reason, the cooling water flows along both the inside and outside surfaces of the spiral shape of the valve body driving unit 60, and it is easy to ensure a large contact area between the cooling water and the valve body driving unit 60. Therefore, the valve body driving unit 60 senses the temperature of the cooling water accurately and quickly, and easily causes the valve body 57 to move by the valve body driving unit 60 at an appropriate timing.

  The shape of the valve body driving unit 60 is not limited to the spiral shape as long as the shape is displaced in the radial direction of the rotation shaft of the on-off valve 51 before and after the transformation point of the shape memory alloy. For example, the valve body driving unit 60 may be formed so that it is a coil spring made of a shape memory alloy and contracts below the transformation point and extends from a contracted state when the temperature changes beyond the transformation point. Alternatively, the valve body driving unit 60 may be formed so as to have a wave shape at a temperature lower than the transformation point and a straight plate shape at a temperature higher than the transformation point.

  The valve body driving unit 60 may be a component that is deformed depending on temperature, and is not limited to a component made of a shape memory alloy. For example, you may use the thermo element using the volume change by a temperature change. Or you may use the bimetal using the metal plate from which a thermal expansion coefficient differs.

  The on-off valve 51 includes a rotation drive unit 54 that receives force from the flow of cooling water flowing through the flow path 20 and drives the on-off valve 51. For this reason, it is not necessary to provide a driving motor or wiring in order to control the driving of the on-off valve 51. Therefore, the heat exchange device 1 can be reduced in size. Moreover, since it is not necessary to electrically control the on-off valve 51, the control flow can be simplified.

  The flow rate adjusting device 50 is provided at a connection location between the first flow path 21 and the second flow path 22. For this reason, the cooling water which adjusted the flow rate can be poured into both the 1st heat exchange part 31 and the 2nd heat exchange part 32 using the single flow rate adjustment apparatus 50. FIG. Therefore, it is possible to cool the plurality of heat generating parts by exchanging heat. Alternatively, heat exchange can be performed simultaneously on a plurality of locations of one heat generating component. Moreover, the heat exchange capability of the 1st heat exchange part 31 and the heat exchange capability of the 2nd heat exchange part 32 can be changed according to a use or heat exchange object. Therefore, heat exchange can be performed on various objects using one heat exchange device 1. Here, the flow path 20 is not limited to the one that branches into the two paths of the first flow path 21 and the second flow path 22, and includes a third flow path and the like to branch the cooling water path into three or more paths. May be.

  The flow rate adjusting device 50 periodically increases or decreases the flow rate of the cooling water flowing through the first heat exchange unit 31 and the second heat exchange unit 32 that form a heat exchanger. For this reason, compared with the case where the flow rate of the cooling water flowing into the first heat exchanging part 31 and the second heat exchanging part 32 repeats non-periodic increase / decrease, such as when the pump 7 is not a steady flow but an irregular flow. It is easy to keep the heat exchange capacity of the entire heat exchange device 1 constant. Therefore, it is difficult to cause a situation where sufficient cooling cannot be performed due to a lack of heat exchange capability of the heat exchange device 1. Moreover, by making the flow of the cooling water a pulsating flow whose flow rate periodically changes, the heat exchange capacity of the entire heat exchanging device 1 can be increased as compared with the case where the cooling water is flowed in a steady flow.

  The rotation drive unit 54 is not limited to a water wheel structure that receives force from the flow of cooling water. For example, the rotation of the on-off valve 51 may be electrically controlled using an electric motor. According to this, the on-off valve 51 can be rotated at an arbitrary number of rotations. Therefore, it is easy to increase the heat exchange efficiency of the heat exchanging device 1 while maintaining an appropriate rotation speed of the on-off valve 51.

Second Embodiment This embodiment is a modified example based on the preceding embodiment. In this embodiment, the valve body driving portion 260 is not a component whose shape is deformed depending on the temperature, such as a shape memory alloy, but a component that expands and contracts in the radial direction of the rotary shaft of the on-off valve 51 by centrifugal force.

  In FIG. 7, the valve body drive part 260 is a spiral plate member. The valve body drive unit 260 is formed by winding a plate member around a bearing portion provided along the rotary shaft portion 59 in the on-off valve 51. The valve body driving unit 260 moves the valve body 57 in the radial direction of the rotation shaft of the on-off valve 51 by contracting in the radial direction of the rotation shaft of the on-off valve 51.

  Centrifugal force caused by the rotation of the on-off valve 51 is greater than the contraction force that the valve body drive unit 260 tends to contract inward, and the valve body 57 is pressed against the inner surface of the case 29. The valve body 57 is in contact with the case 29 in a state of facing the second flow path 22 and is in a state of closing the opening of the second flow path 22. In other words, the flow of the cooling water in the second flow path 22 is stopped. On the other hand, the first flow path 21 is in an open state communicating with the valve opening 56, and the cooling water flows toward the first heat exchange unit 31.

  In FIG. 8, the valve body drive unit 260 is in a state where the valve body 57 is pulled in a direction in which the valve body 57 approaches the rotation shaft portion 59. The contraction force that the valve element drive unit 260 attempts to contract inward is greater than the centrifugal force that accompanies the rotation of the on-off valve 51, and a large gap is formed between the valve element 57 and the inner surface of the case 29. Although the valve body 57 is a position facing the second flow path 22, the valve body 57 is away from the inner surface of the case 29, and therefore the opening of the second flow path 22 is not closed. In other words, the cooling water is flowing through the second flow path 22. At this time, since the cooling water flows also in the first flow path 21, the cooling water flows simultaneously in both the first flow path 21 and the second flow path 22.

  The valve body driving unit 260 changes the size of the outer diameter according to the magnitude of the centrifugal force generated when the on-off valve 51 rotates. That is, when the cooling water flow force obtained by the rotation drive unit 54 is large and the on-off valve 51 rotates quickly, the generated centrifugal force is large. Due to the action of the large centrifugal force, the valve body driving portion 260 is greatly deformed so as to spread outward in the radial direction of the rotation shaft of the on-off valve 51, and the valve body 57 is pressed against the inner surface of the case 29.

  On the other hand, when the flow force of the cooling water obtained by the rotation drive unit 54 is small and the on-off valve 51 rotates slowly, the generated centrifugal force is small. With the action of this small centrifugal force, the valve body drive unit 260 has a small amount of deformation spreading outward in the radial direction of the rotation shaft of the on-off valve 51, and the valve body 57 cannot be pressed against the inner surface of the case 29. That is, the valve body 57 and the case 29 are always separated from each other, and the first flow path 21 and the second flow path 22 cannot be closed.

  According to the embodiment described above, the valve body driving unit 260 moves the valve body 57 toward the radially outer side of the rotation shaft of the on-off valve 51 as the flow rate of the cooling water that is the heat medium increases, and the flow rate of the cooling water. The smaller the is, the more the valve body 57 is moved toward the radially inner side of the rotation shaft of the on-off valve 51. In other words, when the flow rate of the cooling water is large and the cooling water needs to be actively exchanged in the first heat exchange unit 31 or the second heat exchange unit 32, the flow of the cooling water is converted into a pulsating flow. Thus, the heat exchange efficiency of the first heat exchange unit 31 and the second heat exchange unit 32 is increased. On the other hand, when the flow rate of the cooling water is small and it is not necessary to actively exchange heat with the first heat exchanging unit 31 or the second heat exchanging unit 32, the flow of the cooling water is left as a steady flow. The pressure loss of the flow of the cooling water in the first flow path 21 and the second flow path 22 is reduced. For this reason, the heat exchange efficiency in the 1st heat exchange part 31 and the 2nd heat exchange part 32 can be improved, so that there are many heat exchange amounts required in the 1st heat exchange part 31 and the 2nd heat exchange part 32.

Third Embodiment This embodiment is a modification in which the preceding embodiment is a basic form. In this embodiment, the valve body driving unit 360 is not configured by a single component, but is configured by two components, a first valve body driving unit 360a and a second valve body driving unit 360b. .

  In FIG. 9, both the first valve body drive unit 360a and the second valve body drive unit 360b are the same spiral member and are formed of a shape memory alloy. The first valve body drive unit 360 a and the second valve body drive unit 360 b are provided side by side in a direction along the rotation axis of the on-off valve 51 in a state of being wound around the bearing portion of the on-off valve 51. A gap is formed between the first valve body drive unit 360a and the second valve body drive unit 360b provided side by side.

  The first valve element drive unit 360 a is in contact with a position closer to the upper end part than the lower end part of the valve element 57. On the other hand, the second valve element drive unit 360b is in contact with a position closer to the lower end than the upper end of the valve element 57. That is, the valve body drive unit 360 is in contact with the valve body 57 at two positions, a position near the upper end and a position near the lower end.

  If the temperature of the cooling water is equal to or higher than the transformation point of the shape memory alloy that forms the valve body driving unit 360, the valve body 57 has two locations, the first valve body driving unit 360a and the second valve body driving unit 360b. The contact portion is pressed toward the inner surface of the case 29. On the other hand, if the temperature of the cooling water is lower than the transformation point of the shape memory alloy forming the valve body driving unit 360, the valve body 57 is the second valve body driving unit 360b and the second valve body driving unit 360b. The contact portion is pulled in a direction away from the inner surface of the case 29.

  According to the above-described embodiment, the valve body driving unit 360 includes the first valve body driving unit 360a and the second valve body driving unit 360b that are provided side by side in the direction along the rotation axis of the on-off valve 51. . For this reason, the valve element 57 moves in the radial direction of the rotation shaft of the on-off valve 51 by applying force from the valve element driving unit 360 at a plurality of locations. Therefore, the valve body 57 can be moved more smoothly than when the valve body 57 is moved by applying force from only one place. That is, when the valve body 57 is moved, it is easy to suppress a situation in which the valve body 57 is inclined without the force of the valve body driving unit 360 being appropriately transmitted.

Fourth Embodiment This embodiment is a modified example based on the preceding embodiment. In this embodiment, the on-off valve 51 includes a guide portion 461 that guides the movement of the valve body 57.

  As shown in FIGS. 10 and 11, the lower surface portion 55 that forms a part of the on-off valve 51 includes a guide portion 461. The guide portion 461 has a rectangular groove shape whose longitudinal direction is the radial direction of the rotation shaft of the on-off valve 51. A part of the valve body 57 is inserted into a groove shape forming the guide portion 461. In the valve body 57, the portion inserted into the guide portion 461 is a portion protruding from the central portion in the arc shape in the cross section of the valve body 57 toward the lower surface portion 55.

  At a temperature equal to or higher than the transformation point of the shape memory alloy forming the valve body driving unit 60, the valve body 57 is positioned on the outermost side in the movable range set in the guide unit 461. In the state where the valve body 57 is located on the outermost side, the valve body 57 and the inner surface of the case 29 are not in contact with each other, and a slight gap is formed. In other words, the valve body 57 is in a throttle state that restricts the amount of cooling water flowing through the second flow path 22 at a position where the opening of the second flow path 22 is not completely blocked. In the pulsating flow mode, the throttle state that restricts the flow rate of the cooling water flowing through the first heat exchange unit 31 and the second heat exchange unit 32 and the cooling water flowing through the first heat exchange unit 31 and the second heat exchange unit 32 are used. The valve element 57 is located at a position where the open state where the flow rate is not limited can be switched.

  The first flow path 21 and the second flow path 22 change the flow speed of the cooling water flowing inside by repeating the two states of the throttle state and the open state by the flow rate adjusting device 50. For this reason, cooling water can be flowed through the first heat exchange unit 31 and the second heat exchange unit 32 in a pulsating flow state in which the flow velocity periodically changes. Therefore, the heat exchange efficiency of the heat exchange device 1 can be increased as compared with the case where the cooling water flows in a steady flow.

  As shown in FIG. 12 and FIG. 13, at a temperature lower than the transformation point of the shape memory alloy forming the valve body driving unit 60, the rotation shaft portion is more than the intermediate point of the guide portion 461 in the movable range set in the guide portion 461. A valve body 57 is located inside 59. In a state where the valve body 57 is positioned on the inner side of the intermediate point of the guide portion 461, the valve body 57 and the inner surface of the case 29 are not in contact with each other, and a large gap is formed. That is, the valve body 57 is in an open state in which the opening of the second flow path 22 is opened. In the steady flow mode, the first flow path 21 and the second flow path 22 are far away from each other so that the flow rate of the cooling water flowing through the first heat exchange section 31 and the second heat exchange section 32 is not limited. The valve body 57 is located at the position.

  The first flow path 21 and the second flow path 22 are always opened by the flow rate adjusting device 50, and the flow rate of the cooling water flowing through the inside does not change. For this reason, it is possible to flow cooling water through the first heat exchange unit 31 and the second heat exchange unit 32 in a steady flow state with a constant flow rate. Therefore, the pressure loss of the heat exchange device 1 can be reduced as compared with the case where the cooling water flows in a pulsating flow.

  In the flow velocity adjusting device 50, in the mode switching between the pulsating flow mode and the steady flow mode, the valve body drive unit 60 is moved to the guide unit 461 while maintaining a state where a part of the valve body 57 is inserted into the guide unit 461. Then, the valve body 57 is slid along. Thereby, the valve body 57 can move in the radial direction of the rotation shaft of the on-off valve 51 while maintaining an angle orthogonal to the lower surface portion 55. In other words, since the valve body 57 is inclined with respect to the lower surface portion 55, an unintentional gap is prevented from being formed between the first flow path 21 or the second flow path 22 and the valve body 57. It's easy to do.

  According to the embodiment described above, the on-off valve 51 includes the guide portion 461 that guides the movement of the valve body 57. For this reason, the valve body 57 can be appropriately moved along the guide portion 461. Therefore, it is easy to suppress the situation where the valve body 57 is inclined and cannot be moved appropriately.

  In the pulsating flow mode, a slight gap is formed between the valve body 57 and the inner surface of the case 29 in a state where the valve body 57 is positioned on the outermost side in the radial direction. For this reason, the valve body 57 does not close the first flow path 21 and the second flow path 22. Therefore, it is possible to prevent the valve body 57 and the inner surface of the case 29 from contacting and wearing with the rotation of the on-off valve 51. Therefore, the flow rate adjustment function by the flow rate adjustment device 50 can be easily exerted stably over a long period of time.

Other Embodiments The movement of the valve body 57 is not limited to the slide movement. For example, the lower end portion of the valve body 57 may be fixed to the lower surface portion 55 with a hinge structure, and the valve body 57 may be moved by being inclined so as to change the distance between the upper end portion of the valve body 57 and the rotating shaft portion 59. . According to this, the pulsating flow mode and the steady flow mode can be switched by moving the valve body 57 so as to change the angle of inclination of the valve body 57.

  The disclosure in this specification is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations by those skilled in the art based thereon. For example, the disclosure is not limited to the combinations of parts and / or elements shown in the embodiments. The disclosure can be implemented in various combinations. The disclosure may have additional parts that can be added to the embodiments. The disclosure includes those in which parts and / or elements of the embodiments are omitted. The disclosure encompasses the replacement or combination of parts and / or elements between one embodiment and another embodiment. The technical scope disclosed is not limited to the description of the embodiments. Some technical scope disclosed is indicated by the description of the claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the claims.

  DESCRIPTION OF SYMBOLS 1 Heat exchange apparatus, 7 Pump (fluid transport apparatus), 20 Flow path, 21 1st flow path, 22 2nd flow path, 31 1st heat exchange part (heat exchanger), 32 2nd heat exchange part (Heat exchange) ), 50 flow rate adjusting device, 51 on-off valve, 53 rotation drive body, 54 rotation drive section, 56 valve opening, 57 valve body, 59 rotation shaft section, 60 valve body drive section, 260 valve body drive section, 360 valve body Drive part, 360a 1st valve body drive part, 360b 2nd valve body drive part, 461 Guide part

Claims (10)

A heat exchanger (31, 32) through which a heat medium flows;
A fluid transport device (7) for flowing a heat medium through the heat exchanger;
A flow path (20) through which a heat medium flows by connecting the heat exchanger and the fluid transport device;
A flow rate adjusting device (50) provided in the flow path and configured to increase or decrease the flow rate of the heat medium flowing through the flow path using the on-off valve (51),
The on-off valve is
A valve body (57) that changes the amount of the heat medium flowing through the flow path by rotating;
A heat exchange device comprising: a valve body drive unit (60, 260, 360) that moves the valve body in a radial direction of a rotation shaft of the on-off valve.   The valve body drive unit moves the valve body toward the radially outer side of the rotary shaft of the on-off valve as the temperature of the heat medium is higher, and the lower the temperature of the rotary shaft of the on-off valve as the temperature of the heat medium is lower. The heat exchange device according to claim 1, wherein the valve body is moved radially inward.   The heat exchanger according to claim 2, wherein the valve body driving unit is formed of a shape memory alloy.   The valve body drive unit (260) moves the valve body toward the radially outer side of the rotary shaft of the on-off valve as the flow rate of the heat medium increases, and the lower the flow rate of the heat medium, The heat exchange device according to claim 1, wherein the valve body is moved toward a radially inner side of the rotation shaft.   The heat exchanging apparatus according to any one of claims 1 to 4, wherein the valve body driving unit has a spiral shape in which a vortex is wound around a rotation axis of the on-off valve.   The said valve body drive part (360) is a heat exchange apparatus in any one of Claims 1-5 provided in multiple numbers in the direction in alignment with the rotating shaft of the said on-off valve.   The said on-off valve is a heat exchange apparatus in any one of Claims 1-6 provided with the guide part (461) which guides the movement of the said valve body.   The said on-off valve is provided with the said flow path, The rotation drive part (54) which receives the force from the flow of the heat medium which flows through the said flow path, and rotationally drives the said on-off valve is provided from Claim 1 characterized by the above-mentioned. The heat exchange device according to any one of 7. The heat exchanger includes a first heat exchange part (31) and a second heat exchange part (32),
The flow path is
A first flow path (21) for flowing a heat medium to the first heat exchange section;
A second flow path (22) for flowing a heat medium to the second heat exchange section,
The heat exchange device according to any one of claims 1 to 8, wherein the flow rate adjusting device is provided at a connection portion between the first flow path and the second flow path.   The heat exchange device according to any one of claims 1 to 9, wherein the flow rate adjusting device periodically increases or decreases the flow rate of the heat medium flowing through the heat exchanger.

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