JP2011106351A - Heat accumulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat accumulator immediately discharging high-temperature cooling water. <P>SOLUTION: A movable diaphragm 13 dividing the inside of a tank 11 into a first chamber 30 and a second chamber 31 is provided in the tank 11, and an abutting portion 32 abutting on the inner wall of the tank 11 in a narrower clearance than the case that cooling water is stored when hot water is stored in the tank 11 is provided on the periphery of the movable diaphragm 13. When the high-temperature cooling water is stored in the tank 11, the abutting portion 32 abuts on the inner wall of the tank 11. When the high-temperature cooling water is discharged from the tank 11, the abutting portion 32 is slid with the inner wall of the tank 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a heat accumulator.

  Conventionally, the cooling water whose temperature has been increased by cooling the engine is stored in a heat accumulator, and at the next engine start, the cooling water stored in the heat accumulator is circulated to warm up the engine. Japanese Patent Application Laid-Open No. H10-228707 discloses a method for shortening the time. In Patent Document 1, the moving partition plate is moved when the engine is started, so that the cooling water in the container main body having a heat retaining function flows out from the drain port or the warm-up circulation port to warm up the engine.

JP-A-4-246277

  However, in the above invention, when the moving partition plate is moved, there is a problem that the moving partition plate is caught on the container body and the movement of the moving partition plate is prevented.

  The present invention has been invented in order to solve such problems, and has an object to quickly discharge cooling water having a high temperature from a container main body without disturbing the movement of the moving partition plate.

  A regenerator according to an aspect of the present invention is a regenerator that stores hot water in a tank, and the tank is divided into a first chamber and a second chamber, and the first chamber and the second chamber are moved by moving in the tank. A movable partition plate that changes the volume of the second chamber and discharges hot water in the tank from the tank is provided, and the movable partition plate is narrower when cold water is stored when hot water is stored in the tank. A contact portion that contacts the inner wall of the tank with a gap is provided, and the contact portion slides on the inner wall of the tank when the hot water is discharged from the tank.

  According to the present invention, cooling water having a high temperature can be quickly discharged from the regenerator.

It is a schematic block diagram of the thermal storage system in embodiment of this invention. It is a schematic sectional drawing of the heat accumulator of embodiment of this invention. It is a figure explaining the flow of the cooling water in the embodiment of the present invention. It is a figure explaining the flow of the cooling water in the embodiment of the present invention.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram of a heat storage system in the present embodiment. In the heat storage system in the present embodiment, a system that cools a driving engine of an automobile and reuses heat of cooling water whose temperature has increased will be described as an example. The cooling water is LLC (long life coolant) which is an antifreeze liquid, but is not limited to this, and water or the like may be used. Hereinafter, the cooling water whose temperature has been increased by cooling the engine is referred to as hot water.

  The heat storage system includes an engine 1, a heat accumulator 2, an electric water pump 3, a heater 4 for heating a passenger compartment, a first circuit 5, a second circuit 6, a controller 7, and heat of engine cooling water. And a radiator (not shown) for radiating heat.

  The engine 1 includes a cooling unit 10 through which cooling water flows to cool an engine body whose temperature has been increased by burning fuel.

  The heat accumulator 2 will be described with reference to FIG. FIG. 2 is a schematic cross-sectional view of the heat accumulator 2. In the present embodiment, a case where the heat accumulator 2 is arranged in the vertical direction will be described. In FIG. 2, the downward direction in the vertical direction is indicated by an arrow y.

  The heat accumulator 2 includes a tank 11, a partition plate 12, and a movable partition plate 13. For example, when the engine 1 is stopped, the heat accumulator 2 stores hot water in preparation for the next start of the engine 1. The hot water stored in the heat accumulator 2 is supplied to the cooling unit 10 and the heater 4 of the engine 1 at the next start of the engine 1.

  The tank 11 includes a first tank portion 15 and a second tank portion 16.

  The 1st tank part 15 is a rectangular shape, and the lower side is opening. A side surface of the first tank portion 15 forms a first opening 17 on the lower side.

  The second tank portion 16 has a box shape with a bottom, and the upper side is open. A side surface of the second tank portion 16 forms a second opening 18 on the upper side. The bottom surface 19 of the second tank portion 16 has a smaller area than the opening area of the second opening 18. Therefore, the side surface of the second tank portion 16 is tapered. The second tank 11 has two holes 20a and 20b on the bottom surface 19, and cooling water is supplied and discharged from the holes 20a and 20b. The tank 11 is configured by joining the first tank part 15 and the second tank part 16 together with the first opening part 17 of the first tank part 15 and the second opening part 18 of the second tank part 16. The The tank 11 is covered with a heat insulating material (not shown), and the heat accumulator 2 suppresses heat radiation from the tank 11.

  The partition plate 12 is provided so as to partition a part of the tank 11 between two holes 20 a and 20 b provided in the bottom surface 19 of the second tank portion 16. The partition plate 12 forms a communication port 21 above the tank 11.

  The movable partition plate 13 has a box shape with a bottom, and divides the space in the tank 11 partitioned by the partition plate 12 into a first chamber 30 and a second chamber 31 in a direction perpendicular to the y direction. In the present embodiment, the space below the movable partition plate 13 in the y direction is the first chamber 30, and the space above the movable partition plate 13 is the second chamber 31. In the present embodiment, the second chamber 31 is a space partitioned by the partition plate 12 and includes a space where the movable partition plate 13 is not provided. The first chamber 30 has a hole 20 a provided in the bottom surface 19 of the second tank 11, and the second chamber 31 has a hole 20 b provided in the bottom surface 19 of the second tank 11. In addition, although mentioned later in detail, warm water is supplied to the 2nd chamber 31 through the hole 20b. On the other hand, when discharging hot water, the cooling water is supplied to the first chamber 30 through the hole 20a, and the movable partition plate 13 is pushed upward along the y direction, whereby the hot water in the second chamber 31 is supplied. Is discharged.

  The movable partition plate 13 includes a contact portion 32 having a substantially semicircular cross section in the y direction along the outer periphery of the side surface. The contact portions 32 are provided at two locations above and below the movable partition plate 13 along the outer periphery of the side surface. In this embodiment, the contact part 32 is provided in two places, However, it is not restricted to this, You may provide a contact part further. The contact portion 32 reduces friction between the inner wall of the tank and the partition plate 12 to facilitate the movement of the flexible partition plate 13 and suppresses the inclination of the flexible partition plate 13.

The movable partition plate 13 is made of a material having a lower thermal conductivity and a larger volume density than the cooling water. For example, the material of the movable partition plate 13 is a material having a thermal conductivity lower than 0.6 W / (m · K) and a volume density of 1100 kg / m ³ or more. The movable partition plate 13 has a contact portion 32 that contacts the inner wall of the tank 11 and the partition plate 12 when hot water is stored in the tank 11, and cooling water (cold water) having a low temperature is stored in the tank 11. When stored, it is made of a material that heat-shrinks and creates a gap between the contact portion 32 and the inner wall of the tank 11 and the partition plate 12. In addition, you may comprise the contact part 32 and the main body of the movable partition plate 13 by another member. Even when high-temperature cooling water is stored, the movable partition plate 13 can be moved in the tank 11 when the cooling water is moved.

  When the temperature is lowered, the movable partition plate 13 is thermally contracted, and a wider gap is generated between the contact portion 32 and the inner wall of the tank 11 and the partition plate 12 than at a high temperature.

  When warm water is stored in the tank 11, the movable partition plate 13 moves upward along the y direction by supplying cooling water to the first chamber 30. At this time, the abutting portion 32 slides on the inner wall of the tank 11 and the partition plate 12, so that the hot water in the second chamber 31 is efficiently discharged from the tank 11 through the hole 20b. Further, since the high-temperature cooling water is stored, there is no larger gap between the abutting portion 32 and the inner wall of the tank 11 and the partition plate 12 than when the cold water is stored. It is possible to prevent the cooling water having a low temperature from entering the second chamber 31 and to suppress the temperature drop of the hot water discharged from the tank 11.

  When hot water is discharged from the tank 11, the amount of cooling water having a low temperature increases in the tank 11. Therefore, the movable partition plate 13 is thermally contracted, and a large gap is generated between the abutting portion 32 and the inner wall of the tank 11 and the partition plate 12 as compared with the time of storing hot water. Move downward.

  The height h1 of the movable partition plate 13 is higher than the height h2 of the communication port 21. By making the height h <b> 1 of the movable partition plate 13 higher than the height h <b> 2 of the communication port 21, it is possible to prevent the movable partition plate 13 from entering the communication port 21.

  The movable partition plate 13 includes a hole 33 that penetrates the bottom surface 35 and a movable valve 34 on the bottom surface 35. The movable valve 34 is provided so as to close the hole 33, and opens when the water pressure above the movable valve 34 is greater than the water pressure below the movable valve 34 by a predetermined pressure. The predetermined pressure is a predetermined pressure. In the structure as shown in FIG. 2, a gap corresponding to the operation of the movable valve 34 is generated between the bottom surface 19 and the movable partition plate 13 by the tapered portion. In addition, a protrusion may be protruded from the movable partition plate 13 so as to form a gap with the bottom surface 19. Thereby, at the time of introduction | transduction of warm water, replacement | exchange with cold water is performed rapidly.

  The heater 4 warms the air passing between the tubes of the heater 4 by the heat of hot water in an air conditioner (not shown), supplies the warmed air to the interior of the vehicle, and warms the interior of the vehicle.

  The first circuit 5 connects the cooling unit 10 of the engine 1 and the heater 4. The first circuit 5 circulates cooling water between the cooling unit 10 of the engine 1 and the heater 4. The cooling water whose temperature has been increased by cooling the engine 1 is supplied to the heater 4 by the first circuit 5.

  The second circuit 6 connects the heat accumulator 2 to the first circuit 5. The electric water pump 3 is provided in the second circuit 6. The second circuit 6 includes a bypass path 40 that bypasses the electric water pump 3. After the engine 1 is stopped, the electric water pump 3 is driven, hot water flows through the second circuit 6, and the hot water is stored in the heat accumulator 2 through the second circuit 6. Further, when the engine 1 is started, hot water from the heat accumulator 2 is supplied to the heater 4 and the engine 1 via the second circuit 6.

  The bypass path 40 is connected to the second circuit 6 via the three-way valve 41. The first circuit 5 and the second circuit 6 are connected by a three-way valve 42.

  The electric water pump 3 senses engine stop by the signal of the engine key switch and supplies hot water to the heat accumulator 2.

  The controller 7 controls the flow of the cooling water by switching the three-way valves 41 and 42 and controlling the electric water pump 3.

  Next, the operation of this embodiment will be described with reference to FIGS. FIG. 3 is a diagram showing the flow of cooling water when warm water is stored in the heat accumulator 2. FIG. 4 is a diagram showing the flow of cooling water when warm water is discharged from the heat accumulator 2. 3 and 4, the flow of the cooling water is indicated by arrows. When the heater 4 is operated during normal operation other than when the engine 1 is stopped or started, the cooling water circulates through the first circuit 5.

  When hot water is stored in the heat accumulator 2, the electric water pump 3 is activated when the engine 1 is stopped. Further, the electric water pump 3 and the heat accumulator 2 communicate with each other by the three-way valve 41, and the first circuit 5 and the second circuit 6 communicate with each other by the three-way valve 42.

  Accordingly, the hot water is supplied to the second chamber 31 via the second circuit 6 and the hole 20b. When the hot water flows into the second chamber 31, the water pressure in the second chamber 31 increases. When the water pressure on the upper side of the movable partition plate 13 becomes higher than the water pressure on the lower side of the movable partition plate 13 by a predetermined pressure or more, the movable valve 34 is opened, and the cooling water having a low temperature in the second chamber 31 is formed in the holes 33, It is discharged from the heat accumulator 2 through 20a. As a result, warm water is stored in the second chamber 31.

  When warm water is discharged from the heat accumulator 2 and the engine 1 is warmed up, the first circuit 5 and the second circuit 6 are communicated by the three-way valve 42 when the engine 1 is started. Further, the second circuit 6 and the bypass passage 40 are communicated by the three-way valve 41. Thereby, the cooling water is supplied to the first chamber 30 through the hole 20a. The cooling water supplied to the first chamber 30 pushes up the movable partition plate 13 upward. At this time, since warm water is stored in the second chamber 31, the contact portion 32 of the movable partition plate 13 is in contact with the inner wall of the tank 11 and the partition plate 12 or has a fine gap. Therefore, the movable partition plate 13 slides on the inner wall of the tank 11 and the partition plate 12 and moves upward. Thereby, the hot water in the second chamber 31 is discharged from the heat accumulator 2 through the hole 20b. By supplying the hot water discharged from the heat accumulator 2 to the engine 1 or the like, warm-up at the time of starting can be performed quickly. Note that when the engine 1 is driven, the cooling water flows through the first circuit 5 and the like by a water pump or the like that operates by rotation of the crankshaft or the like.

  Note that the heat accumulator 2 may be provided with a guide member that guides the movement of the rectifying plate and the movable partition plate 13 in the y direction so that the movable partition plate 13 is prevented from being inclined in the tank 11. As a guide member, it is a penetration stick which penetrates movable partition plate 13, for example.

  In the present embodiment, the heat accumulator 2 is connected by the second circuit 6 to the first circuit 5 that connects the cooling unit 10 of the engine 1 and the heater 4, but is not limited thereto.

  In the present embodiment, warm water is stored in the heat accumulator 2 when the engine 1 is stopped, but hot water may be stored in the heat accumulator 2 every predetermined time when the engine is driven.

  Moreover, the shape of the tank 11 and the shape of the movable partition plate 13 are not limited to the shape of this embodiment, For example, the shape of the tank may be a columnar shape.

  The effect of the embodiment of the present invention will be described.

  By providing the movable partition plate 13 with the contact portion 32 having a substantially semicircular cross section, the contact between the contact portion 32 and the inner wall of the tank 11 and the partition plate 12 becomes a line contact, and the movable partition plate 13 is attached to the tank 11. The movable partition plate 13 can be quickly moved while restrained from being caught. Therefore, the warm water in the tank 11 can be quickly discharged from the tank 11, and for example, the engine 1 and the like can be warmed up quickly. Lowering the viscosity of engine oil reduces friction and improves fuel efficiency. Moreover, when discharging warm water, the contact part 32 is made to slide on the inner wall and the partition plate 12 of the tank 11, and it can prevent that a cooling water with low temperature is mixed with warm water, and the temperature of warm water falls. Can be suppressed.

  By configuring the movable partition plate 13 with a material having a lower thermal conductivity than that of the cooling water, when the hot water is stored in the tank 11, the temperature drop of the hot water can be suppressed.

  In addition, by configuring the movable partition plate 13 with a material having a volume density larger than that of the cooling water, after introducing the cooling water that is cold water and discharging the warm water from the tank 11, the movable partition plate 13 is caused by its own weight. Can be moved downward. Therefore, the movable partition plate 13 can be moved downward without using a motor or the like. By contracting with cold water, the gap between the movable partition plate 13 and the tank 11 and the partition plate 12 is increased, so that the lower partition can be moved more smoothly.

  By providing the abutting portions 32 at two locations above and below the outer periphery of the movable partition plate 13, the movable partition plate 13 can be stably moved when moving in the tank 11.

  By making the movable partition plate 13 into a box shape with a bottom, a large amount of hot water can be stored in the tank 11 and can be moved stably when the movable partition plate 13 is moved.

  It goes without saying that the present invention is not limited to the above-described embodiments, and includes various modifications and improvements that can be made within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 Engine 2 Heat accumulator 3 Electric water pump 13 Movable partition plate 30 1st chamber 31 2nd chamber 32 Contact part 33 Hole 34 Movable valve

Claims (4)

In a regenerator that stores hot water in a tank,
The tank is divided into a first chamber and a second chamber, and the volumes of the first chamber and the second chamber are changed by moving in the tank, and hot water in the tank is supplied to the tank. Equipped with a movable partition plate that discharges from
The movable partition plate has a contact portion that contacts the inner wall of the tank with a narrower gap when storing cold water when storing hot water in the tank,
The contact portion slides on the inner wall of the tank when the hot water is discharged from the tank.   The regenerator according to claim 1, wherein the movable partition plate has a thermal conductivity lower than that of the hot water and a volume density higher than that of the hot water.   The heat accumulator according to claim 1, wherein a plurality of the contact portions are provided in the moving direction.   The regenerator according to any one of claims 1 to 3, wherein the movable partition plate has a bottomed box shape.

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