JP2011075050A - Hydraulic fluid temperature control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable desired supercooling release; and to improve heat release characteristics of a latent heat storage material to enable satisfactory heat exchange between itself and a hydraulic fluid. <P>SOLUTION: The latent heat storage material 51 stored in a latent heat storage material container 50 disposed on a circulation passage, through which the hydraulic fluid O is circulated, exchanges heat between itself and the hydraulic fluid O. By the operation of a plurality of supercooling release means 60 disposed in the longitudinal direction of the latent heat storage material container 50, or the supercooling release means disposed linearly along the longitudinal direction, the supercooling of the latent heat storage material 51 in a supercooled state is released. Using the latent heat thereof, the temperature of the hydraulic fluid O is rapidly increased by the heat exchange with the latent heat storage material 51. That is, the plurality of supercooling release means 60 are disposed in the longitudinal direction of the latent heat storage material container 50, or the supercooling release means is disposed linearly along the longitudinal direction. Therefore, the latent heat storage material 51 in the supercooled state is subjected to supercooling release at substantially the same time, thereby rapidly increasing the temperature of the hydraulic fluid O. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention optimizes viscosity, fluidity, oxidation stability, etc. by controlling the temperature of hydraulic fluid such as automatic transmission fluid (hereinafter simply referred to as “ATF”) and engine hydraulic fluid to a desired temperature. The present invention relates to a hydraulic oil temperature control device that controls the oil pressure. In particular, the present invention relates to a hydraulic oil temperature control device suitable for vehicles such as automobiles, construction machines, agricultural machines, industrial machines, and trains.

As a technology that utilizes the supercooling phenomenon of conventional latent heat storage materials (supercooled substances), the amount of heat is absorbed from the high temperature ATF, and the generated latent heat is used to release the supercooling at the low temperature start to reduce the ATF. There is technology to warm up.
That is, an automatic transmission (automatic transmission) uses an ATF for lubrication and driving, and the ATF pumped from an oil pan by an oil pump is controlled by a valve body for clutch and lubrication. Yes. When the outside air temperature is low such as in winter, the oil temperature of ATF becomes low and the viscosity increases. Due to the increase in viscosity, the fluidity decreases, and even with the same control oil pressure, the oil pressure and flow rate differ, and time and know-how are required for tuning to improve the shifting feeling of the automatic transmission. The current situation is.
On the other hand, as a method for raising the oil temperature at the time of low temperature start, there is a method of warming by another part such as an oil warmer, but the system becomes complicated and the cost becomes high.

As this type of known technique, for example, there are techniques described in Patent Document 1 and Patent Document 2.
Patent Document 1 is a heat generating device that is provided in an engine oil pan or an oil lubrication path and that raises the temperature of engine oil. The heat generating device includes a heat generating device body that encloses a supercooling substance having a large latent heat due to supercooling, and The main body has a built-in trigger member that triggers the start of heat generation on the subcooled substance before heat generation in the heat generating device body, and a heater that liquefies the subcooled substance after heat generation in the heat generating device body. By raising the value, combustion products can be evaporated.

In Patent Document 2, a heat storage body including a latent heat storage material capable of causing a phase transition by heat exchange with the working fluid is provided in a portion where the working fluid always flows in a circulation path through which the working fluid circulates. Therefore, the working fluid that always circulates in the circulation path always exchanges heat with the heat storage body provided in the circulation path. As a result, when the working fluid temperature is higher than the phase transition temperature of the latent heat storage material constituting the heat storage body, the latent heat storage material of the heat storage body absorbs the latent heat accompanying the phase transition from the working fluid. Reduce the temperature. In addition, when the working fluid temperature is lower than the phase transition temperature of the latent heat storage material constituting the heat storage body, the temperature of the working fluid is increased by the radiation of latent heat accompanying the phase transition from the latent heat storage material that has absorbed heat as described above. be able to.
Therefore, the temperature fluctuation range of ATF during normal operation is small and the allowable range of viscosity change of ATF that needs to be considered in design can be reduced. Therefore, design and development (adjustment and adaptation etc.) of multiple control valves It can be easily performed. Moreover, since the heat at the time of high load operation is absorbed by the heat storage material heat exchanger, the operation load of the cooling system can be reduced, and the fuel efficiency of the applied automobile can be improved.

Japanese Patent Laid-Open No. 06-50122 JP 2007-303557 A

However, the technology of Patent Document 1 includes a heat generating device body in which a supercooling substance having a large latent heat due to supercooling is enclosed, and a trigger member that triggers a heat generation start to the subcooling substance before heat generation in the heat generating device body, A heater for liquefying the supercooled substance after heat generation in the heat generating device body is built in, and the combustion products can be evaporated by raising the oil temperature of the engine oil.
The technique described in Patent Document 1 receives a control signal from a trigger control unit and cooling water temperature data from a water temperature sensor, outputs a control signal to the heater under a desired condition, and drives the heater. Therefore, a heater is indispensable, and in order to raise the oil temperature of engine oil, heater control becomes mainstream, and the involvement of the heat generating device body in which the supercooling substance is sealed is hidden.

Moreover, the technique of patent document 2 is provided with the heat storage material heat exchanger which is a heat storage body in the oil pan which comprises the circulation path | route through which ATF which is hydraulic fluid circulates, and the said heat storage material heat exchanger is high temperature ATF and The heat transfer from the solid phase to the liquid phase by heat exchange of the heat absorbs the heat of fusion from the ATF, and the heat transfer with the low temperature ATF causes the phase transition from the liquid phase to the solid phase to release heat of solidification to the ATF. Although it is configured to include a heat storage material, the breakthrough cooling device is provided in a part of the heat storage material heat exchanger as shown in FIGS. 9, 12, and 14 of Patent Document 2. Not too much. Further, the heat storage material heat exchanger is also configured, for example, as one or a plurality of containers filled with a liquid latent heat storage material, or a large number of microcapsules enclosing the latent heat storage material.
In particular, if the heat storage material heat exchanger configured to include the latent heat storage material can be configured as a plurality of containers or a large number of microcapsules, how is the breakthrough cooling device configured? This is a big problem, but there is nothing to disclose about it.
That is, the problem is how rapidly the temperature of the heat storage material heat exchanger can rise depending on the necessity, but there is no disclosure about this.
In particular, in vehicles such as automobiles, construction machines, agricultural machines, industrial machines, trains, etc., those having predetermined knowledge are operated, but none of the techniques suitable for them is disclosed.

  Therefore, the present invention has been made in view of such points, and can be released from the desired supercooling, improve the heat dissipation characteristics of the latent heat storage material, and perform good heat exchange with the hydraulic oil. An object of the present invention is to provide a hydraulic oil temperature control device that can be used.

The hydraulic oil temperature control device according to claim 1 is disposed in a circulation path through which the hydraulic oil circulates, allows free heat exchange with the hydraulic oil, and performs phase exchange by heat exchange with the hydraulic oil. A latent heat storage material container containing a latent heat storage material that causes a transition is formed in a substantially circular or substantially elliptical shape, a substantially semicircular shape, a substantially semielliptical shape, or a substantially polygonal shape having a substantially triangular shape or more. And a plurality of supercooling release means are arranged in the one direction or linearly along the one direction. In addition, “substantially” means not only those that are completely formed with straight lines or curves, but also that the straight lines include curves, or that the curves include straight lines and are formed into approximate shapes, It means that it is not a simple basic shape.
Here, the latent heat storage material may be a supercooled substance that is housed in the latent heat storage material container and causes phase transition by heat exchange with the hydraulic oil.
In addition, the latent heat storage material container accommodates a latent heat storage material that undergoes phase transition by heat exchange with the hydraulic oil, and a vertical cross section with respect to a specific direction is substantially circular or substantially elliptical, substantially semicircular, substantially Any one of a semi-elliptical shape or an approximately triangular shape or more may be used. In particular, a substantially polygonal shape with a cross-sectional shape of approximately a triangle or more means that a complex cross-section may be used.
And the said supercooling cancellation | release means is accommodated in the said latent heat storage material container which accommodated the said latent heat storage material, and is arrange | positioned linearly along the said one direction by the plurality in the said one direction.
In the present invention, the one direction means a specific direction of a two-dimensional plane as viewed from the upper surface unless otherwise specified, and one direction of a cross section is one side of the cross section. It means the length longer or shorter than the side.

The supercooling release means of the hydraulic oil temperature control device according to claim 2 includes an energy generation source that gives energy to the latent heat storage material, and a plurality of the energy generation sources are arranged in the one direction, or the one It has a linear shape along the direction.
Here, the supercooling release means is disposed in the latent heat storage material of the latent heat storage material container and provides the latent heat storage material with a starting point (trigger) for promoting crystallization, and energy from an energy generation source. Triggers. In the experiments conducted by the inventors, the crystallization of the latent heat storage material is crystallized at about 6 mm / s, even if there is a difference in materials. Responsiveness can be set according to the form.

The energy generation source of the hydraulic oil temperature control device according to claim 3 applies any one or more of vibration, agitation, displacement, deformation, heat, and electricity to the latent heat storage material.
Here, the energy generation source may be a generation source including any one or more of vibration, stirring, displacement, deformation, heat, and electricity.

The supercooling release means of the hydraulic oil temperature control device according to claim 4 is electromagnetically coupled from the outside of the latent heat storage material container to vibrate, stir the latent heat storage material inside the latent heat storage material container, Any one or more of displacement and deformation is given.
Here, applying any one or more of vibration, stirring, displacement, and deformation to the latent heat storage material inside the latent heat storage material container by electromagnetically coupling from the outside of the latent heat storage material container It induces from the outside of the heat storage material container to cause vibration, agitation, displacement and deformation of the latent heat storage material existing inside, thereby unsupercooling.

  The supercooling release means of the hydraulic oil temperature control device according to claim 5 is an electrode that is long in the one direction. Here, the electrode long in one direction may be a single electrode arranged in the one direction or a plurality of electrodes arranged in the one direction.

The latent heat storage material container of the hydraulic oil temperature control device according to claim 6 has one or more substantially bent portions formed in the longitudinal direction.
Here, the formation of one or more substantially bent portions in the one direction as the latent heat storage material container does not mean that the whole is an accurate bend such as a curve, or there may be a plurality of bent portions. Means that. In any case, the distance in the one direction may be long for heat transfer and for expansion and contraction of the latent heat storage material.

The latent heat storage material container of the hydraulic oil temperature control device according to claim 7 has a substantially spiral shape.
Here, the substantially spiral shape includes not only those having a central axis in a linear direction but also inclined spirals whose central axes do not intersect with each other at a predetermined angle. What is necessary is just to lengthen the distance of the said one direction with this substantially spiral.

The latent heat storage material container of the hydraulic oil temperature control device according to claim 8 is formed by insert-molding a metal material having good heat conduction transmitted to the hydraulic oil.
Here, it is desirable that the latent heat storage material container is formed by insert-molding a metal material having good heat conduction into the latent heat storage material container to extract thermal energy from the latent heat storage material.

According to the hydraulic oil temperature control device of the first aspect of the present invention, the hydraulic oil temperature control device is arranged in a circulation path through which the hydraulic oil circulates, and can freely exchange heat with the hydraulic oil, and heat with the hydraulic oil. A latent heat storage material that contains a latent heat storage material that causes a phase transition by exchange and has a vertical cross-section in one direction that is one of a substantially circular shape, a substantially elliptical shape, a substantially semicircular shape, a substantially semielliptical shape, or a substantially polygonal shape that is substantially triangular or more In the heat storage material container, a plurality of supercooling release means are arranged in the one direction or arranged linearly along the one direction.
Therefore, the latent heat storage material accommodated in the latent heat storage material container disposed in the circulation path through which the hydraulic oil circulates exchanges heat with the hydraulic oil. Then, by the operation of the supercooling release means arranged in plural or linearly along one direction of the latent heat storage material container, the subcooling of the latent heat storage material in the supercooled state is released, and the latent heat , The temperature of the hydraulic oil is rapidly increased by heat exchange with the latent heat storage material. This temperature rise is caused by arranging a plurality of supercooling release means or linearly extending along the one direction with respect to the one direction of the latent heat storage material container. At substantially the same time, the temperature of the hydraulic oil can be rapidly increased by releasing the supercooling.
In this way, when the hydraulic oil temperature is higher than the phase transition temperature of the latent heat storage material, the latent heat storage material absorbs the latent heat associated with the phase transition from the hydraulic oil to lower the hydraulic oil temperature, and the hydraulic oil temperature Is lower than the phase transition temperature of the latent heat storage material, the temperature of the working fluid can be raised by the radiation of latent heat accompanying the phase transition from the absorbed latent heat storage material.
Therefore, the heat dissipation characteristics of the latent heat storage material can be improved, and good heat exchange with the hydraulic oil can be achieved.

  The supercooling release means of the hydraulic oil temperature control device of the invention of claim 2 comprises an energy generation source that gives energy to the latent heat storage material, and a plurality of the energy generation sources are arranged in the one direction, or Since it has a linear shape along one direction, in addition to the effect according to claim 1, the supercooling is quickly released, and by the heat radiation of the latent heat accompanying the phase transition of the latent heat storage material, The temperature of hydraulic fluid can be raised. In the experiments conducted by the inventors, the crystallization of the latent heat storage material proceeds at about 6 mm / s even if there is a difference in material, and the speed of heat conduction is determined by the shape of the container. Responsiveness to temperature rise of oil can be improved.

  Since the energy generation source of the hydraulic oil temperature control device according to a third aspect of the present invention applies any one or more of vibration, agitation, displacement, deformation, heat, and electricity to the latent heat storage material, In addition to the effects described above, the supercooling can be released with a simple circuit configuration, and the area and the one direction can be set as appropriate, so the design freedom is high, and the operation is performed by the release of latent heat accompanying the phase transition of the latent heat storage material. The temperature of the oil can be raised.

  The supercooling release means of the hydraulic oil temperature control device according to claim 4 is electromagnetically coupled from the outside of the latent heat storage material container to vibrate and stir the latent heat storage material inside the latent heat storage material container. In addition to the effect of any one of claims 1 to 3, in addition to the effect of any one of claims 1 to 3, electromagnetically coupled from the outside of the latent heat storage material container. Since any one or more energy of vibration, agitation, displacement, and deformation is applied to the latent heat storage material inside the latent heat storage material container, the latent heat storage material inside the latent heat storage material container It eliminates the possibility of impurities entering and can be expected to operate stably for a long time.

  The supercooling release means of the hydraulic oil temperature control device of the invention of claim 5 is an electrode that is long in the one direction, and has a simple structure in addition to the effect of any one of claims 1 to 3. Thus, heat or electricity can be applied to the latent heat storage material.

  Since the latent heat storage material container of the hydraulic oil temperature control device of the invention of claim 6 is formed with a substantially bent portion in the one direction, the effect according to any one of claims 1 to 5 is achieved. In addition, the surface area can be increased and the amount of heat supplied to the hydraulic oil can be increased. Further, the expansion / contraction of the latent heat storage material can also be absorbed by the substantially bent portion of the latent heat storage material container.

  Since the latent heat storage material container of the hydraulic oil temperature control device of the invention of claim 7 has a substantially spiral shape, in addition to the effect of any one of claims 1 to 6, The surface area can be increased and the amount of heat supplied to the hydraulic oil can be increased. Further, the expansion / contraction of the latent heat storage material can be absorbed by the substantially spiral shape of the latent heat storage material container.

  Since the latent heat storage material container of the hydraulic oil temperature control device according to the eighth aspect of the invention is formed by insert-molding a metal material having good heat conduction to be transmitted to the hydraulic oil, the first to seventh aspects of the invention are provided. In addition to the effect described in any one of the above, the temperature of the latent heat storage material in the latent heat storage material container can be efficiently transferred to the hydraulic oil by the inserted metal material.

FIG. 1 is an explanatory view showing, in section, the configuration of an oil pan and a transmission case when the hydraulic oil temperature control device according to the first embodiment of the present invention is used in an AT. FIG. 2 is a cross-sectional view of the hydraulic oil temperature control apparatus according to the first embodiment of the present invention, taken along section line AA in FIG. FIG. 3 is a plan view of the hydraulic oil temperature control apparatus according to the first embodiment of the present invention as seen from above the oil strainer on the opening side of the oil pan. FIG. 4 is a plan view of the hydraulic oil temperature control apparatus according to the first embodiment of the present invention when the bottom surface is viewed from the opening side of the oil pan with the oil strainer removed. FIG. 5 is a principle diagram in which the crystal acceleration of the latent heat storage material used in the hydraulic oil temperature control apparatus according to the first embodiment of the present invention is measured. (A) is a length direction, and (b) is a right angle to the length direction. It is a measurement explanatory drawing of the speed of a direction. FIG. 6 is a block circuit diagram of a control circuit device used in the hydraulic oil temperature control device according to the first embodiment of the present invention. FIG. 7 is a flowchart controlled by the control circuit device used in the hydraulic oil temperature control device according to the first embodiment of the present invention. FIG. 8 is a temperature characteristic diagram of the latent heat storage material used in the hydraulic oil temperature control apparatus according to the first embodiment of the present invention. FIG. 9 is an explanatory view of a cross section of Example 1 of the latent heat storage material container used in the hydraulic oil temperature control device according to the first embodiment of the present invention, and FIG. Sectional drawing and FIG.9 (b) are principal part top views which show the structure inside a latent-heat storage material container. FIG. 10 is an explanatory view of a cross section of Example 2 of the latent heat storage material container used in the hydraulic oil temperature control device according to the first embodiment of the present invention. FIG. 11 is an explanatory view of a cross section of Example 3 of the latent heat storage material container used in the hydraulic oil temperature control device according to the first embodiment of the present invention. FIG. 12 is an explanatory view of a cross section of Example 4 of the latent heat storage material container used in the hydraulic oil temperature control device according to the first embodiment of the present invention. 13 corresponds to a cross-sectional view of the hydraulic oil temperature control device according to the second embodiment of the present invention, taken along the section line AA in FIG. FIG. 14: is the top view which looked at the bottom face of the hydraulic-oil temperature control apparatus concerning Embodiment 2 of this invention except the inner bottom face from the opening side of the oil pan. FIG. 15: is explanatory drawing of the cross section of Example 5 of the latent heat storage material container used with the hydraulic-oil temperature control apparatus concerning Embodiment 2 of this invention. FIG. 16: is a perspective view of Example 5 of the latent heat storage material container used with the hydraulic-oil temperature control apparatus concerning Embodiment 2 of this invention. FIG. 17: is explanatory drawing of the cross section of Example 6 of the latent heat storage material container used with the hydraulic-oil temperature control apparatus concerning Embodiment 2 of this invention. FIG. 18 is an explanatory view of a cross section of Example 7 of the latent heat storage material container used in the hydraulic oil temperature control device according to the second embodiment of the present invention.

  Hereinafter, embodiments and examples of the present invention will be described with reference to the drawings. Note that, in the embodiments and examples, the same symbols and the same reference numerals in the drawings are the same or corresponding mechanism parts, and therefore, redundant description is omitted here.

[Embodiment 1]
When the hydraulic oil temperature control device of the present invention is implemented, the present invention is not limited to the ATF of the embodiment described here, but can be applied to oil for cooling an internal combustion engine and oil usable for hydraulic equipment such as a special vehicle. Is. Therefore, these oils are expressed as hydraulic oils in the present invention. That is, this hydraulic oil temperature control device is used for hydraulic oil for automatic transmission (AT), hydraulic oil for continuously variable transmission (CVT), and a drive unit for a hybrid car (HV). The present invention relates to a hydraulic fluid temperature control device that can be used for hydraulic fluid such as hydraulic fluid, cooling fluid for internal combustion engines, and special vehicles.
That is, it is used as a hydraulic oil temperature control device suitable not only for private demand but also for vehicles such as automobiles, construction machines, agricultural machines, industrial machines, and trains. The hydraulic oil of the present invention includes lubricating oil such as engine oil.

  1 to 4, an automatic transmission mechanism (not shown) is housed in the housing portion 1 a of the transmission case 1 that houses the transmission mechanism. The oil pan 2 that stores the hydraulic oil O includes a bottom portion 21 and a wall portion 22 that extends upward from the outer periphery of the bottom portion 21, and stores the hydraulic oil O in a space surrounded by the bottom portion 21 and the wall portion 22. It is. The bottom 21 does not have a mechanical strength and the flow of the hydraulic oil O in the oil pan 2, and it is difficult for bubbles to enter the oil suction port 41 of the oil strainer 4 sucked by an oil pump (not shown). The structure is easy to wrap around.

  A valve body (V / B) 3 houses a plurality of valves for controlling a transmission, a clutch, a torque converter, etc. of an automatic transmission for a vehicle. Usually, the valve body (V / B) 3 is located directly below the transmission mechanism and above the oil strainer 4. It is arranged. Also in the present embodiment, the oil strainer 4 is attached to the valve body 3 with bolts 44.

  The oil strainer 4 is housed in the oil pan 2 and has an oil suction port 41 that sucks the hydraulic oil O stored in the oil pan 2 by an oil pump (not shown). The hydraulic oil O is filtered by a filter 42, The filtered hydraulic oil O is supplied to a transmission of an automatic transmission for a vehicle, a clutch, a torque converter, and a plurality of valves for controlling them through an oil discharge port 46 and an oil pump (not shown).

  The opening area of the oil suction rod 41 of the oil strainer 4 is made larger than the opening area, and a gap through which the hydraulic oil O passes is formed between the oil strainer 4 and the inner wall of the oil pan 2.

  The structure of the oil strainer 4 having the transmission case 1 that houses the speed change mechanism configured as described above, the oil pan 2 that stores hydraulic oil, the valve body 3, and the oil suction port 41 that is sucked by the oil pump is In the space surrounded by the transmission case 1, the hydraulic oil O is accommodated up to the oil level OL. When the normal engine is driven, the hydraulic oil O is supplied without interruption from an oil suction port 41 of the oil strainer 4 to an oil pump (not shown).

Furthermore, the structure of the oil pan 2 of the hydraulic oil temperature control apparatus according to Embodiment 1 of the present invention will be described in detail.
1 to 4, the oil pan 2 is made of a synthetic resin injection-molded product, and a latent heat storage material container 50 described later is formed on the bottom 21 thereof. The latent heat storage material container 50 may be formed integrally with the oil pan 2 or may be insert-molded by two-color molding or a metal plate. Moreover, after forming the latent heat storage material container 50 separately, it can also be attached to the bottom part 21 of the oil pan 2 by screwing, adhesion, or the like. A latent heat storage container 50 a is also formed on the wall portion 22 of the oil pan 2. The latent heat storage material containers 50a are extended so as to substantially match the length of the oil pan 2 in the longitudinal direction, and in this embodiment, two rows are formed on the left and right side surfaces. Both the latent heat storage material container 50 and the latent heat storage material container 50a of the bottom portion 21 and the wall portion 22 may have the same volume, or may have a size relationship. In the present embodiment, the latent heat storage material containers 50 on the bottom 21 side and the wall 22 side have substantially the same capacity.
In addition, the upper surface of the latent heat storage material container 50a of the wall part 22 is made to incline, and it has the structure where the hydraulic oil O returns inside. In addition, the distance from the valve body 3 is set so that the oil level OL is unlikely to change with respect to the shaking of the vehicle.

  The latent heat storage material container 50 has a shape extending in the length direction of the oil pan 2, that is, the traveling direction of the vehicle in consideration of the flow of the hydraulic oil O in the bottom portion 21, and in this embodiment, seven rows are arranged in the bottom portion 21. Forming. In these seven rows, the cross-sectional area is narrow in the vicinity of the oil suction rod 41 of the oil strainer 4. The portion where the cross-sectional area is narrowed is the hydraulic oil introduction portion 50A, which reduces the fluid resistance of the hydraulic oil O when the hydraulic oil O is guided to the oil suction rod 41 of the oil strainer 4, and the amount of hydraulic oil O Is secured.

  In the hydraulic oil introduction section 50A, the cross section of the seven rows of latent heat storage material containers 50 may be narrowed, or completely divided into two, and the vicinity of the oil suction port 41 (the cross section of the latent heat storage material container 50 becomes narrower). The latent heat storage material container 50 may be arranged in two places except for the present range. In other words, any structure may be used as long as the hydraulic oil O is easily supplied to the oil sucker 41 of the oil strainer 4 and the hydraulic oil O is easily collected. In the present embodiment, it is possible to flow in a direction parallel to and perpendicular to the traveling direction of the vehicle. Of course, the flow of the hydraulic oil O with respect to the oil suction pad 41 of the oil strainer 4 not only flows to the position where the cross section of the seven rows of latent heat storage material containers 50 is narrowed or divided into two, but also the oil strainer 4 The lower surface of the nozzle functions as a current plate, and the hydraulic oil O can be guided to the oil suction pad 41. However, in order to further reduce the fluid resistance, the cross section of the seven rows of latent heat storage material containers 50 is reduced, or the fluid resistance of the hydraulic oil O is reduced by dividing the latent heat storage material container 50 into two.

  The latent heat storage material containers 50 formed on the bottom portion 21 and the latent heat storage material containers 50 formed on the wall portion 22 are not limited to the seven rows and the two rows of the above-described embodiment, but any number It can be.

  In addition, as a material of this latent heat storage material container 50, if it has corrosion resistance and chemical stability, such as polyethylene, a fluororesin, stainless steel, and aluminum oxide, it can be used.

  In the present embodiment, the latent heat storage material container 50 is a cylindrical container in which sodium acetate is accommodated. The vertical cross section perpendicular to the longitudinal direction may be one of a substantially circular shape, a substantially elliptical shape, a substantially semicircular shape, a substantially semielliptical shape, or a substantially triangular shape that is substantially triangular or more. The above-described substantially polygonal shape that is not less than a triangular shape means a complex shape.

As shown in FIG. 2, in the latent heat storage material container 50 of the present embodiment, supercooling release means 60 for solving the supercooled state of the latent heat storage material 51 is arranged along the longitudinal direction thereof. Specifically, the supercooling release means 60 is formed of a rectangular piezoelectric element (piezo element) (not shown) that is long in the front and back direction in FIG. 2, and is applied in the thickness direction of the surface (vertical direction in FIG. 2) by applying a drive voltage. Change. The electrodes of the piezoelectric element are electrically connected via a printed circuit formed on a substrate (not shown), and the substrate is bonded to the bottom surface of the latent heat storage material container 50. The configuration of the piezoelectric element will be described in detail with reference to FIG.

Therefore, when the driving voltage is intermittently applied to the piezoelectric element that is the supercooling release means 60, the thickness of the piezoelectric element is intermittently changed to give energy to the latent heat storage material, thereby causing the latent heat storage material to be overcooled. Sometimes used as a trigger to start crystallization. That is, it is set as a stimulus for starting the crystallization of the latent heat storage material 51. When crystallization is started, the drive energy of the piezoelectric element that is the supercooling release means 60 is stopped as the crystallization progresses.
In addition, although the piezoelectric element which is the supercooling cancellation | release means 60 of a present Example consists of a piezoelectric element of a plane substantially rectangular shape, the circular piezoelectric element can also use 1 sheet or multiple sheets.

  The latent heat storage material 51 in the case of carrying out the present invention is not limited to the sodium acetate hydrate used in the present embodiment, and a substance corresponding to the required melting point can be selected. , Calcium chloride hydrate, sodium sulfate hydrate, sodium thiosulfate hydrate, sodium acetate hydrate, calcium chloride hexahydrate, sodium carbonate hydrate, potassium hydrogen carbonate aqueous solution, sodium sulfate decahydrate, penta Polyhydric alcohols such as erythritol, mannitol, erythritol, and threitol, paraffins having various melting points can be used, and can also be used as a mixture.

  Incidentally, as shown in FIG. 5 (a), the inventors made a transparent container A made of a synthetic resin having a diameter of about 20 mm and a length of about 150 mm, and impact bars that collide with each other at both ends thereof. B was disposed. When the latent heat storage material 51 is under cooling due to the impact between the impact rods B, it was used as a trigger for crystallization. From this experiment, it was confirmed that most of the material of the latent heat storage material 51 progresses in crystallization at about 6 mm / s in the length direction.

  In addition, as shown in FIG. 5B, the inventors create a transparent container A made of a synthetic resin having a diameter of about 20 mm and a length of about 150 mm, and disposing a vibration line C at the center thereof. The vibration stimulus of the vibration line C serves as a trigger for starting crystallization when the latent heat storage material 51 is under cooling. From this experiment, it was also confirmed that most of the latent heat storage material 51 was crystallized at about 6 mm / s in a direction perpendicular to the length direction.

FIG. 6 is a control device that controls the hydraulic oil temperature control device of the present embodiment.
The control unit 100 is a program-controlled circuit composed of a microcomputer or the like. The output driver 101 controls the generation of a rectangular wave, the generation of alternating current or direct current, and the like by a drive circuit corresponding to the type of the supercooling release means 60. The temperature update memory 103 estimates the temperature rise of the latent heat storage material 51 from the temperature rise of the hydraulic oil O measured by the temperature sensor 104, and may directly detect the temperature of the latent heat storage material 51. In the embodiment, the temperature of the hydraulic oil O is detected. The output of the ignition switch 105 is input to the control unit 100, and the output of the control unit 100 is input to the engine start display 106 indicating that the engine drive is delayed from the turning on of the ignition switch 105.

FIG. 7 is a control program of the control unit 100 that performs program control of the hydraulic oil temperature control device of the present embodiment. The operation will be described with reference to the temperature characteristic diagram of the latent heat storage material of FIG.
First, when the ignition switch 105 is turned on in step S1, it is determined that the ignition switch 105 is turned on, and the processing of this program is started. When it is confirmed that the ignition switch 105 is turned on, the engine is driven in step S2. In step S3, it is determined how many times the temperature T of the hydraulic oil O has been raised during the previous driving of the engine. At least, it is judged whether or not it exceeds the latent heat storage material melting point temperature Tn (strictly, the latent heat storage material melting point temperature + temperature at which the temperature difference of the hydraulic oil O is corrected), and the temperature T of the hydraulic oil O is higher than that. If so, it is judged that it is in a supercooled state due to sufficient heat of fusion. Of course, in the normal design, the current temperature T of the hydraulic oil O is not set to be lower than the break-through cooling temperature Tx that releases the supercooling state by itself, but the current temperature of the hydraulic oil O is long-distance transportation or the like. It is also possible to add to the requirement for determination whether the temperature T of this is lower than the breakthrough cooling temperature Tx at which the supercooling state is released by itself.

  Since the supercooling state is not achieved at the first time when the assembly is completed, the temperature T of the hydraulic oil O does not exceed the latent heat storage material melting point temperature Tn when the engine is driven last time. Accordingly, while the engine is driven as it is, the increase in the temperature T of the hydraulic oil O at that time is updated and registered in step S7. Until the stop of the engine is confirmed in step S8, the routines of steps S7 and S8 are performed.

  When it is determined that the temperature T of the hydraulic oil O is higher than the latent heat storage material melting point temperature Tn when the engine is driven last time in step S3 after the next engine start, in step S4, the supercooling release means is set via the driver 101. 60 is operated, the elapse of 3 seconds is determined in step S5, the supercooling release means 60 is operated for 3 seconds, and the supercooling release means 60 is stopped in step S6. In step S7, the increase in the temperature T of the hydraulic oil O is updated and registered, and the maximum temperature of the hydraulic oil during driving is recorded. Until the stop of the engine is confirmed in step S8, the routines of steps S7 and S8 are performed.

  Thus, when the engine is started for the first time, in the automatic transmission, the working oil O circulates through the working flow path including the speed change mechanism and the oil pan 2. And if it will be in a normal driving | running state, the temperature of the hydraulic oil O will rise to temperature higher than the minimum minimum temperature Ts of a vehicle driving | running state. In this case, as shown by the thin arrows in FIG. 8, the latent heat storage material 51 undergoes heat exchange and increases in temperature as the temperature of the hydraulic oil O increases. When the latent heat storage material 51 reaches the latent heat storage material melting point temperature Tn, the latent heat storage material 51 is melted. At this time, the latent heat storage material 51 absorbs the latent heat (melting heat) required for melting the latent heat storage material 51 from the hydraulic oil O by heat exchange with the hydraulic oil O in the oil pan 2. Thus, until the latent heat storage material 51 is completely liquefied, the latent heat storage material melting point temperature Tn is substantially constant, the hydraulic oil O is cooled (heat is taken away), and the temperature of the hydraulic oil O is set to the latent heat storage material 51. The latent heat storage material is maintained at a temperature near the melting point temperature Tn. In a state where the latent heat storage material 51 is completely liquefied, heat corresponding to the heat of fusion of the latent heat storage material 51 is stored in the latent heat storage material 51.

Further, as shown by a thick arrow in FIG. 8, when the latent heat storage material 51 is in a liquid phase state, if the temperature of the hydraulic oil O decreases due to engine stop or the like, the liquid phase The latent heat storage material 51 is cooled. For example, the latent heat storage material 51 is lowered with the hydraulic oil O after the operation is completed and maintains its liquid phase, that is, the heat storage state of the melting heat without solidifying even if its temperature falls below the latent heat storage material melting point temperature Tn.
And as long as the latent heat storage material 51 cools down with the hydraulic oil O after the operation is completed and the temperature of the latent heat storage material 51 does not fall below the breakthrough cooling temperature Tx, the latent heat storage material 51 maintains the heat storage state of the melting heat in the liquid phase. For the breakthrough cooling temperature Tx, a material and a temperature are selected such that the temperature does not become lower than that temperature in a normal use state.

  Next, when the automobile is started, the supercooling release means 60 is first operated within a few seconds by turning on the ignition switch 105. Then, as shown in FIG. 8, the latent heat storage material 51 immediately solidifies and dissipates solidification heat, which is the amount of heat stored by heat exchange with the hydraulic oil O. Thereby, the latent heat storage material 51 of the latent heat storage material container 50 is heated and heated up, and warming-up of an automatic transmission is accelerated | stimulated.

  When the hydraulic oil O circulates through the operating flow path including the transmission mechanism and the oil pan 2 and enters a normal operation state, the latent heat storage material 51 is melted when the temperature of the hydraulic oil O reaches the latent heat storage material melting point temperature Tn. . The latent heat storage material 51 absorbs latent heat (melting heat) required for melting the latent heat storage material 51 from the hydraulic oil O by heat exchange with the hydraulic oil O in the oil pan 2, and the latent heat storage material 51 is completely liquefied. Until, it becomes substantially constant at the latent heat storage material melting point temperature Tn. The hydraulic oil O is cooled (heat is taken away), and the temperature of the hydraulic oil O is maintained at a temperature near the latent heat storage material melting point temperature Tn of the latent heat storage material 51. In the state where the latent heat storage material 51 is completely liquefied, Heat corresponding to the heat of fusion of the latent heat storage material 51 is stored in the latent heat storage material 51.

As described above, when the supercooling release means 60 is operated within a few seconds by turning on the ignition switch 105, the latent heat storage material 51 immediately starts to solidify, and the hydraulic oil O is exchanged with the hydraulic oil O during operation. Dissipates solidification heat, which is the amount of heat stored. Thereby, the latent heat storage material 51 of the latent heat storage material container 50 is heated and heated up, and warming-up of an automatic transmission is accelerated | stimulated.
Of course, it can be used not only as an automatic transmission such as an automobile but also as a hydraulic oil temperature control device suitable for vehicles such as construction machinery, agricultural machinery, industrial machinery, and trains.

[Example 1]
In FIG. 9, the latent heat storage material container 50 of this embodiment has a substantially quadrangular cylindrical shape, and supercooling release means 60 for releasing the supercooled state of the latent heat storage material 51 is arranged along the longitudinal direction thereof. Has been. Specifically, the supercooling release means 60 is composed of a disk-shaped piezoelectric element 61 and changes in the thickness direction of the surface by applying a driving voltage. The piezoelectric element 61 is electrically connected to the electrode 61a via an electrode shared conductive substrate 65 and a printed circuit 63 formed on the electrode shared conductive substrate 65 via an insulator 64. 65 is joined to the bottom surface of the latent heat storage material container 50.

  Therefore, when the drive voltage is intermittently applied to the electrode 61a of the disk-shaped piezoelectric element 61 and the electrode shared conductive substrate 65 which are the supercooling release means 60, the thickness of the piezoelectric element 61 changes intermittently, and the latent heat storage material. Energy is given to the latent heat storage material 51 contained in the container 50, triggers crystallization when the latent heat storage material 51 is under cooling, and serves as a stimulus for starting the crystallization of the latent heat storage material 51. At this time, the piezoelectric element 61 gives vibration energy to the latent heat storage material 51 when the applied pulse is short, and gives displacement (deformation) energy when the pulse is long. When crystallization is started, the driving energy (voltage application) of the piezoelectric element 61 is stopped as the crystallization progresses. Therefore, the piezoelectric element 61 is an energy generation source.

In addition, although the piezoelectric element 61 of the present embodiment is composed of the disk-shaped piezoelectric element 61, one or a plurality of piezoelectric elements that are long in the longitudinal direction of the latent heat storage material container 50 can be used.
In particular, when a plurality of sheets are used, efficient crystallization can be achieved by arranging three or more sheets at a certain distance from both ends of the latent heat storage material container 50 in the longitudinal direction.

[Example 2]
10, the latent heat storage material container 50 of the present embodiment has a cylindrical shape with a circular cross section, and a supercooling release means 60 (60 ₋₁ ,..., 60 for releasing the supercooling state of the latent heat storage material 51. _-n ) are disposed along the longitudinal direction thereof. Specifically, the supercooling release means 60 (60 ₋₁ ,..., 60 _−n ) includes an annular piezoelectric element 61 and changes in the radial direction by application of a drive voltage. The electrodes of the piezoelectric element 61 are embedded on the thickness side of the latent heat storage material container 50. Here, n represents the number of the supercooling release means 60, the number n is 2 or more, preferably 3 or more, and is set as appropriate according to the length of the latent heat storage material container 50.

Therefore, when the drive voltage is intermittently applied to the annular piezoelectric element 61 that is the supercooling release means 60 (60 ₋₁ ,..., 60 _−n ), the diameter of the piezoelectric element 61 changes intermittently, and latent heat is generated. Energy is given to the heat storage material 51. This triggers crystallization when the latent heat storage material 51 is under cooling and serves as a stimulus to start crystallization of the latent heat storage material 51. When crystallization is started, the crystallization proceeds, so that the drive is stopped within a few seconds.
In particular, the use of the annular piezoelectric element 61 starts crystallization from the inner peripheral surface side of the latent heat storage material container 50, so that the heat energy of the latent heat storage material container 50 can be directly taken out from an early stage.

[Example 3]
In FIG. 11, the latent heat storage material container 50 of the present embodiment has a cylindrical shape with a circular cross section, and accommodates a latent heat storage material 51. Further, when the latent heat storage material 51 is in a supercooled state, a supercooling release means 60 for releasing the supercooled state is disposed along the longitudinal direction. Specifically, the supercooling release means 60 (60 ₋₁ ,..., 60 _−n ) includes a disk-shaped piezoelectric element 61 and changes in the thickness direction of the surface by applying a driving voltage. The electrode 61 a of the piezoelectric element 61 is embedded in the thickness of the latent heat storage material container 50 via the arrangement auxiliary member 62.
Here, the arrangement auxiliary member 62 has a ring-shaped outer peripheral portion that engages with the inner periphery of the latent heat storage material container 50, and a fixing portion that fixes the piezoelectric element 61 in the diameter direction of the outer peripheral portion is provided. 61 is fixed to the center of the fixing portion. The piezoelectric element 61 is arranged such that its surface faces in a direction perpendicular to the length direction of the latent heat storage material container 50.

Therefore, when the drive voltage is intermittently applied to the annular piezoelectric element 61 that is the supercooling release means 60 (60 ₋₁ ,..., 60 _−n ), the thickness of the piezoelectric element 61 changes intermittently, and the latent heat When energy is given to the heat storage material 51 and the latent heat storage material 51 is under cooling, it becomes a trigger to start crystallization, and becomes a stimulus to start crystallization of the latent heat storage material 51. When crystallization is started, the driving energy of the piezoelectric element 61 is stopped as the crystallization progresses. At this time, since the surface of the piezoelectric element 61 faces in a direction perpendicular to the length direction of the latent heat storage material container 50, the supercooling release means 60 (60 ₋₁ ,..., 60 _-n ) In the direction between each other, that is, in the length direction, the gap between the periphery of the latent heat storage material container 50 and the piezoelectric element 61 is narrowed, and continuity is emphasized, so that crystallization is smoothly performed. Can progress.

[Example 4]
12, in the latent heat storage material container 50 of the present embodiment, the supercooling release means 60 (60 ₋₁ ,..., 60 _−n ) for solving the supercooled state of the latent heat storage material 51 is along the longitudinal direction. Arranged. Specifically, the supercooling release means 60 (60 ₋₁ ,..., 60 _−n ) is formed by the electrodes 66 and 67. In the present embodiment, the electrodes 66 and 67 are circular electrodes facing each other. However, when the present invention is implemented, one electrode extending in the longitudinal direction of the latent heat storage material container 50 instead of the counter electrode of the electrode 66 and the electrode 67 is used. The electrode 66 or the electrode 67 can be a single planar electrode. Here, when a plurality of electrodes 66 and 67 are used for the supercooling release means 60 or when one electric wire is used, the tube-like latent heat storage material container 50 is linearly bent or bent in the oil pan 2. Not only can they be arranged in a zigzag shape, they can also be arranged in a spiral shape. Here, the supercooling release means 60 includes n electrodes 66 and 67. The number of the electrodes 66 and 67 is two or more, and is appropriately set according to the length in the longitudinal direction of the latent heat storage material container 50. However, when the number is three or more, both ends of the latent heat storage material container 50 are set. It is preferable that the latent heat storage material 51 can be efficiently crystallized from the part and the inside (center part).

Electric power is supplied to the electrode 66 and the electrode 67. This electricity momentarily gives energy to stimulate the movement of molecules to the latent heat storage material 51 and serves as a trigger to start crystallization when the latent heat storage material 51 is undercooled. It becomes a stimulus to start crystallization.
Here, the electricity supplied to the electrodes 66 and 67 is not only directly supplied to the latent heat storage material 51 as electric energy, but can also be supplied as heat energy by generating heat by the electricity supplied to the electrodes 66 and 67. When crystallization is started, the crystallization proceeds at about 6 mm / s, but the applied voltage can be set to several seconds or more to accelerate the crystallization of the latent heat storage material 51. Therefore, the electrodes 66 and 67 or one electric wire becomes an energy generation source.

[Embodiment 2]
In FIG. 13, an automatic transmission mechanism (not shown) is accommodated in the accommodating portion 1a of the transmission case 1 that accommodates the transmission mechanism. The oil pan 2 that stores the hydraulic oil O includes a bottom portion 21 and a wall portion 22 that extends upward from the outer periphery of the bottom portion 21. The hydraulic pan 2 stores the hydraulic oil O therein. Structure in which the flow of the hydraulic oil O in the oil pan 2 does not stagnate, the air does not easily enter the oil suction port 41 of the oil strainer 4 that is sucked by an oil pump (not shown), and the hydraulic oil O can easily go around. It is said that.
The valve body 3 houses a plurality of valves for controlling a transmission, a clutch, a torque converter and the like of an automatic transmission for a vehicle, and is usually disposed above the oil strainer 4 directly under the transmission mechanism. .

  The oil strainer 4 is housed in the oil pan 2 and has an oil suction port 41 that sucks the hydraulic oil O stored in the oil pan 2 by an oil pump (not shown). The hydraulic oil O is filtered by a filter 42, The filtered hydraulic oil O is supplied to a transmission, a clutch, a torque converter, and a plurality of valves for controlling them through an oil pump (not shown).

  The structure of the oil strainer 4 having the transmission case 1 that houses the speed change mechanism configured as described above, the oil pan 2 that stores hydraulic oil, the valve body 3, and the oil suction port 41 that is sucked by the oil pump is In the space surrounded by the transmission case 1, the hydraulic oil O is accommodated up to the oil level OL, and the hydraulic oil O is supplied to the oil pump (not shown) from the oil suction port 41 of the oil strainer 4 without interruption.

Furthermore, the structure of the oil pan 2 of the hydraulic oil temperature control device according to the second embodiment of the present invention will be described in detail.
13 and 14, the oil pan 2 is made of a synthetic resin injection-molded product, and a latent heat storage material container 50 described later is formed as a single space at the bottom 21 thereof. The latent heat storage material container 50 is formed as a single space with an outer bottom surface 27 positioned on the side of the bottom portion 21 where the hydraulic oil O is stored and an inner bottom surface 26 disposed to face the outer bottom surface 27. A necessary number of piezoelectric elements 61 mounted on a substantially rectangular common electrode 65 are disposed on the outer bottom surface 27, and the common electrode 65 is joined to the bottom surface of the latent heat storage material container 50.

  In the present embodiment, the electrodes 61 a of the piezoelectric elements 61 are connected in parallel by jumper wires 67 so that the piezoelectric elements 61 are driven simultaneously. The distance between the piezoelectric elements 61 is set to 100 mm or less with respect to the depth direction in which the hydraulic oil O flows, and the distance between the piezoelectric elements 61 is also set to 50 mm or less in the perpendicular direction. That is, the supercooling release means 60 in which a plurality (eight in the present embodiment) of piezoelectric elements 61 are linearly arranged at intervals of 100 mm includes a plurality of (in this embodiment, five) supercooling release means 60 arranged in parallel. The oil pan 2 is disposed at the bottom 21.

  The inner bottom surface 26 facing the outer bottom surface 27 is bent toward the outer bottom surface 27 at regular intervals and is convex with respect to the outer bottom surface 27. In this manner, the inner bottom surface 26 is bent in a convex shape so that a groove 26a formed by bending is formed on the upper portion of the latent heat storage material container 50 formed with a certain width from the inner bottom surface 26 and facing the oil strainer 4. And the surface area facing the oil strainer 4 is widened. Therefore, a groove 26 a that increases the surface area is formed on the upper surface of the latent heat storage material container 50 that is the upper surface of the inner bottom surface 26. The grooves 26a are formed at predetermined intervals in the depth direction (from the front surface to the back surface in FIG. 13) and in the direction perpendicular thereto so that the hydraulic oil O flows toward the oil suction rod 41 of the oil strainer 4. Yes.

  That is, the oil pan 2 is formed by injection molding the bottom portion 21 and the wall portion 22 which are the bottom surface of the latent heat storage material container 50, and then the common electrode 65 on which the piezoelectric element 61 is mounted is arranged and bonded at a desired interval. Then, the upper part of the latent heat storage material container 50 including the inner bottom surface 26 formed by injection molding is integrally joined. The latent heat storage material container 50 is supplied with a latent heat storage material 51 from a supply port (not shown) formed separately, and is sealed so as not to draw air.

  In the hydraulic oil temperature control device according to the second embodiment of the present invention configured as described above, the inner bottom surface 26 and the outer bottom surface 27 forming the latent heat storage material container 50 have 13 rows of grooves 26a, as shown in FIG. The grooves are not limited to the grooves (not shown) in the right-angled rows, and can be an arbitrary number, and only one groove 26a can be used. Although the latent heat storage material container 50 formed in the bottom part 21 of this Embodiment is made into one container in this Embodiment, it is not restricted to this, It can also divide | segment and arrange | position into two or more containers. . The supercooling release means 60 composed of the piezoelectric element 61 or the like in the case of carrying out the present invention has a configuration in which a plurality of electrodes 61a arranged in one direction are paired on the front and back sides, or an electrode 65 that is long in one direction on the front and back It is also possible to adopt a configuration in which a plurality of rows are formed.

[Example 5]
The cross-sectional shape of the latent heat storage material container 50 of the present embodiment depends on the shape of the supercooling release means 60 described later. In the present embodiment shown in FIG. 15, the shaft 71 is disposed in the longitudinal direction of the latent heat storage material container 50, and thus has a predetermined shape centering on the shaft 71. 72 ₋₁ ,..., 72 _−n ) are not specified, and an arbitrary cross-sectional shape can be selected.

  The latent heat storage material container 50 of this embodiment contains sodium acetate hydrate as the latent heat storage material 51. Further, when the latent heat storage material 51 is in a supercooled state, a plurality of supercooling release means 60 for releasing the supercooled state are arranged in the longitudinal direction of the center or along the longitudinal direction. Specifically, the supercooling release means 60 includes a shaft 71, a stirring member 72 disposed on the shaft 71, a coupler 73, and a motor 74.

  The shaft 71 is formed by compressing and molding a bar made of aluminum or stainless steel to have a cross-sectional shape extending substantially radially from the center in order to make it difficult to bend. The periphery is formed to be a round bar with synthetic resin. Further, both end portions 71a and 71b have a conical shape, and the tip thereof forms a substantially apical shaft in a cone shape. One end 71a is fitted into a bearing 70a provided in the latent heat storage material container 50. The other end 71 b is fitted into a bearing 70 b provided in the latent heat storage material container 50.

On the shaft 71, stirring members 72 (72 ₋₁ ,..., 72 _−n ) as energy generation sources are arranged at predetermined intervals. The space | interval of the stirring member 72 of this Embodiment shall be 100 mm or less. That is, in the experiments by the inventors, although the crystallization of the latent heat storage material 51 is slightly different depending on the substance, most of the crystallization proceeds at about 6 mm / s. If crystallization progresses, setting the gap between the stirring members 72 to 100 mm or less starts crystallization from the stirring members 72 on both sides, so that the crystallization is completed in about 8 to 9 seconds, which is 10 seconds or less. become. However, although the temperature rise of the hydraulic oil O becomes slower due to the time lag, the responsiveness can be improved by completing the crystallization in 10 seconds or less.

As shown in FIGS. 15 and 16, a disk-like permanent magnet 73 b is disposed on one end 71 b side of the shaft 71. Similarly, the disk-shaped permanent magnet 73b opposes the disk-shaped permanent magnet 73a and opposes the magnetization. That is, the disk-shaped permanent magnets 73a and 73b may be magnetized in the thickness direction, or may be magnetized in the diameter direction. In any case, any coupler may be used as long as it constitutes the magnetic coupling 73 so that the rotation of the disk-shaped permanent magnet 73a is the rotation of the disk-shaped permanent magnet 73b.
The disk-shaped permanent magnet 73 a is connected to the output shaft 74 a of the motor 74. That is, the output shaft 74 a is subjected to serration processing or knurling processing, and the disk-shaped permanent magnet 73 a is rotated by the output shaft 74 a of the motor 74.

The rotation of the disk-shaped permanent magnet 73a is the rotation of the disk-shaped permanent magnet 73b constituting the coupler 73, and the rotation of the stirring member 72 (72 ₋₁ ,..., 72 _−n ) is the latent heat storage material. The stirring energy is given to 51, and it becomes a trigger to start crystallization when the latent heat storage material 51 is under cooling, and gives a stimulus to trigger the crystallization of the latent heat storage material 51. When crystallization is started, the crystallization proceeds at about 6 mm / s, as will be described later. Therefore, the load is increased by driving the motor 74 for 1 to 2 seconds from the start of rotation. Therefore, the motor 74 is stopped after 3 seconds from the start of rotation.

Here, the stirring member 72 (72 ₋₁ ,..., 72 _−n ) has a cylindrical rod shape so that the stirring energy of the stirring member 72 is increased. However, it is also possible to arrange two or more radially. Further, a protrusion may be formed on a disk-shaped or disk-shaped surface. Of course, depending on the rotation speed of the motor 74, the stirring member 72 (72 ₋₁ ,..., 72 _−n ) may be a needle-like member. And it can be made flexible. Alternatively, a snap action can be performed by fluid resistance at the start of rotation.

[Example 6]
In FIG. 17, a latent heat storage material 51 is accommodated in the latent heat storage material container 50 of the present embodiment. Moreover, the supercooling cancellation | release means 60 which cancels the supercooling state of the latent heat storage material 51 is arrange | positioned along the longitudinal direction. Specifically, the supercooling release means 60 includes the wire 81 and the stirring members 82 (82 ₋₁ ,..., 82 _−n ) and the springs 83 (83a, 83b), the suction member 84, and the electromagnet 85 disposed on the wire 81. It is composed of The attracting member 84 and the electromagnet 85 constitute a magnetic coupler 86.

A wire 81 made of stainless steel wire or iron wire has springs 83a and 83b connected to both ends thereof, and the other ends of the springs 83a and 83b are embedded in the latent heat storage material container 50. The wire 81 is made of springs 83a and 83b. It is arranged in a state where tension is applied. Stirring members 82 (82 ₋₁ ,..., 82 _−n ) are arranged on the wire 81 at a predetermined interval. The interval between the stirring members 82 is set to 100 mm or less.

  At one end of the wire 81, a suction member 84 made of a magnetic material such as a disk-shaped soft iron is disposed, and a spring 83b is accommodated inside the suction member 84. Similarly, the disk-shaped attracting member 84 opposes the magnetization of the disk-shaped electromagnet 85. At this time, the electromagnet 85 may be magnetized in the thickness direction of the attracting member 84 made of a disk-shaped permanent magnet, or may be magnetized in the diameter direction. In any case, when a magnetic field is generated in the disk-shaped electromagnet 85, the spring 83a is expanded by attracting the disk-shaped suction member 84, and the spring 83b is contracted to stop the generation of the magnetic field. A coupler 86 that performs magnetic coupling is configured so that the attracting member 84 is reciprocated by the contraction of 83a and the extension of the spring 83b so that the attracting member 84 is separated from the electromagnet 85, and the electromagnet 85 is turned on / off or AC. Anything can be used.

The disk-like electromagnet 85 is turned on / off by the reciprocating motion of the disk-like suction member 84 constituting the coupler 86, and the moving member 82a (82-1 (82 _-1 ,..., 82- _n ) of the stirring member 82 ( _82-1 ). 82a ₋₁ ,..., 82a _−n ) are reciprocated. The movement of the moving member 82a (82a ₋₁ ,..., 72a _−n ) serves as a trigger for starting crystallization when the latent heat storage material 51 is under cooling, and the crystallization of the latent heat storage material 51 is started. Give a stimulus. When crystallization is started, the crystallization proceeds at about 6 mm / s, so that the driving of the electromagnet 85 is stopped after 3 seconds.

Here, the moving member 82a (82a ₋₁ ,..., 82a _−n ) has a disk shape so that the stirring energy of the stirring member 82 (82 ₋₁ ,..., 82 _−n ) increases. However, it may be a rod shape or a plurality of radial arrangements. Further, a protrusion may be formed on a disk-shaped or disk-shaped surface.
In particular, in this embodiment, contact pieces 82b (82b _-1 ,..., 82b _-n ) are provided, and when the electromagnet 85 attracts the suction member 84, the moving member 82a (82a _-1 ,. , 82a _-n) are moved to the right in FIG. 17, the contact piece 82b (82b _-1, · · ·, collides with 82b _-n), the moving member _{82a (82a -1, ···, 82a} - _n ) Movement is stopped. At this time, since the electromagnet 85 sucks the suction member 84 at a high speed, the moving member 82a (82a ₋₁ ,..., 82a _−n ) is brought into contact with the contact piece 82b (82b ₋₁ ,..., 82b _−n ). And a large amount of energy is applied to the latent heat storage material 51. When the electromagnet 85 releases the suction of the suction member 84, the moving member 82a (82a- ₁ , ..., 82a- _n ) collides with the contact piece 82b (82b- ₁ , ..., 82b- _n ). You may do it. That is, in this case, the moving member 82a (82a- ₁ , ..., 82a- _n ) and the contact piece 82b (82b- ₁ , ..., 82b- _n ) serve as energy generation sources.

Accordingly, when the electromagnet 85 attracts the attracting member 84, the stirring energy that moves the moving member 82a (82a- ₁ , ..., 82a- _n ) thereby causes crystallization when the latent heat storage material 51 is under cooling. It can be a trigger to start and a stimulus to start crystallization of the latent heat storage material 51.
The moving member _{82a (82a -1, ···, 82a} -n) the contact piece _{82b (82b -1, ···, 82b} -n) when colliding on and is added collision energy, greater The energy can be used as a trigger for starting crystallization when the latent heat storage material 51 is under cooling, and as a stimulus for starting the crystallization of the latent heat storage material 51.

[Example 7]
In FIG. 18, the latent heat storage material container 50 of the present embodiment is provided with a supercooling release means 60 for releasing the supercooled state of the latent heat storage material 51 along its longitudinal direction. Specifically, the supercooling release means 60 includes a wire 91, springs 93 (93a, 93b) connected to both ends thereof, a drive magnet 92A that functions as the stirring member 92, and a driven member 92B that functions as the stirring member 92. Has been. The drive magnet 92A and the electromagnet 95 constitute a magnetic coupler 96.

The wire 91 made of stainless steel wire or iron wire has springs 93a and 93b connected to both ends thereof, and the other ends of the springs 93a and 93b are embedded in the latent heat storage material container 50. The wire 91 is made of springs 93a and 93b. It is arranged in a state where tension is applied. The wire 91 includes a stirring member 92 (92 ₋₁ ,..., 92 _−n ), more specifically, a stirring member 92A (92A ₋₁ , 92A ₋₂ ) composed of a permanent magnet, and a material other than a ferromagnetic material. The agitated members 92B (92B ₋₁ ,..., 92B _−n ) are arranged at a predetermined interval. The interval between the stirring members 92 is 100 mm or less.

Two stirring members 92A (92A _-1 and 92A _-2 ) made of a disk-shaped ferromagnetic material are disposed at one end of the wire 91. The disc-shaped stirring member 92 </ b> A opposes the electromagnet 95 disposed outside the latent heat storage material container 50. At this time, the magnetization of the stirring member 92A is magnetized in the thickness direction of the disk-shaped stirring member 92A so that the opposing surfaces of the stirring member 92A- ₁ and the stirring member 92A- ₂ are repelled. It faces the outer peripheral surface of the disc-shaped stirring member 92A so as to be between the stirring member 92A- ₁ and the stirring member 92A- ₂ . As a result, the electromagnet 95 and one of the stirring members 92A have an attractive force, the other of the stirring members 92A has a repulsive force, and the stirring member 92A moves, and the spring 93 expands along with this movement. Shrinkage occurs. When the magnetic force of the electromagnet 95 is stopped or the magnetism is reversed, the stirring member 92A moves in the opposite direction.
That is, the coupler 96 that performs magnetic coupling so that the magnetic field of the stirring member 92A (92A _-1 , 92A _-2 ) made of a disk-shaped permanent magnet is reciprocated by attraction and repulsion due to the interaction with the electromagnet 95. Any configuration may be used as long as the electromagnet 95 is turned on / off or AC driven.

The on / off drive or AC drive of the electromagnet 95 is a reciprocating motion of the disk-shaped stirring member 92A (92A _-1 , 92A _-2 ) constituting the coupler 96, and the stirring member 92A (92A _-1 , 92A _-2 ) Then, the stirring member 92B (92B ₋₁ ,..., 92B _−n ) is reciprocated. The movement of the stirring member 92A (92A ₋₁ , 92A ₋₂ ) and the stirring member 92B (92B ₋₁ ,..., 92B _−n ) triggers crystallization when the latent heat storage material 51 is undercooled. Then, a stimulus to start crystallization of the latent heat storage material 51 is given. When crystallization is started, the crystallization proceeds at about 6 mm / s, so that the driving of the electromagnet 95 is stopped after 3 seconds.

Here, the stirring member 92A (92A ₋₁ , 92A ₋₂ ) and the stirring member 92B (92B ₋₁ ,..., 92B _−n ) are disk-shaped so that the stirring energy of the stirring member 82 is increased. However, a plurality of circular windows 94 are formed in the disk shape, and the stirring of the stirring member 82 is made more complicated. Further, a protrusion may be formed on a disk-shaped or disk-shaped surface. Of course, also in this embodiment, as in the sixth embodiment, the contact piece 82b (82b ₋₁ ,..., 82b _−n ) is provided, and the electromagnet 95 is the stirring member 92A (92A ₋₁ , 92A ₋₂ ). As a result, the agitating member 92 moves and collides with the contact piece 82b (82b- ₁ , ..., 82b- _n ), and the agitating member 92A (92A- ₁ , 92A- ₂ ) and the agitating member are agitated. The movement of the member 92B (92B ₋₁ ,..., 92B _−n ) is stopped. At this time, the stirring member 92A (92A _-1 , 92A _-2 ) and the stirring member 92B (92B _-1 , ..., 92B _-n ) are replaced by the stirring member 92A (92A _-1 , 92A _-2 ) and the stirring member 92B ( 92B ₋₁ ,..., 92B _−n ), and imparts large energy to the latent heat storage material 51.

[Summary of embodiment]
The hydraulic oil temperature control device of the above-described embodiment is arranged in a circulation path through which the hydraulic oil O circulates, allows free heat exchange with the hydraulic oil O, and performs heat exchange with the hydraulic oil O. A latent heat storage material 51 such as sodium acetate hydrate causing phase transition is accommodated, and a vertical cross section perpendicular to the longitudinal direction is substantially circular or substantially elliptical, substantially semicircular, substantially semielliptical, or substantially triangular or more. When the latent heat storage material container 50 is disposed in the latent heat storage material container 50 and the latent heat storage material container 50 is in a supercooled state, in order to solve the supercooled state in the longitudinal direction A plurality of supercooling release means 60 arranged in a line or along the longitudinal direction is provided.

According to this hydraulic oil temperature control device, the latent heat storage material 51 accommodated in the latent heat storage material container 50 disposed in the circulation path through which the hydraulic oil O circulates exchanges heat with the hydraulic oil O. Then, a plurality of the latent heat storage material containers 50 are arranged in the longitudinal direction, or the operation of the linear supercooling release means 60 along the longitudinal direction is used to release the supercooling of the latent heat storage material 51 in the supercooled state. Using the latent heat, the temperature of the hydraulic oil O is rapidly increased by heat exchange with the latent heat storage material 51. This temperature rise is caused by arranging a plurality of supercooling release means 60 or linear supercooling release means 60 along the longitudinal direction with respect to the longitudinal direction of the latent heat storage material container 50. The subcooling of the latent heat storage material 51 can be released almost simultaneously, and the temperature of the hydraulic oil O can be increased efficiently. Here, when the hydraulic oil temperature is higher than the phase transition temperature of the latent heat storage material 51, the latent heat storage material 51 reduces the temperature of the hydraulic oil O by absorbing the latent heat accompanying the phase transition from the hydraulic oil O, When the hydraulic oil temperature is lower than the phase transition temperature of the latent heat storage material 51, the temperature of the working fluid can be raised by the release of latent heat from the phase transition from the latent heat storage material 51 that has absorbed heat.
Therefore, the heat dissipation characteristics of the latent heat storage material 51 can be improved, and good heat exchange with the hydraulic oil O can be achieved.

The latent heat storage material 51 of the hydraulic oil temperature control device of the above-described embodiment may be a supercooled substance that is housed in the latent heat storage material container 50 and causes phase transition by heat exchange with the hydraulic oil O.
For example, calcium chloride hydrate, sodium sulfate hydrate, sodium thiosulfate hydrate, sodium acetate mixture, calcium chloride hexahydrate, sodium carbonate hydrate, potassium hydrogen carbonate aqueous solution, sodium sulfate decahydrate And the like, polyhydric alcohols such as pentaerythritol, mannitol, erythritol, and threitol, paraffins having various melting points can be used, and some can be used as a mixture.

  Moreover, the latent heat storage material container 50 of the said embodiment should just accommodate the latent heat storage material 51 which produces a phase transition by heat exchange between the hydraulic oil O. And the supercooling cancellation | release means 60 of the said embodiment is accommodated in the latent heat storage material container 50 which accommodated the latent heat storage material 51, and is arrange | positioned linearly along the longitudinal direction by the plurality in the longitudinal direction. I just need it. In the present invention, the length direction means a length of one side of the two-dimensional plane viewed from the upper surface longer than the other side, unless otherwise specified, and the length direction of the cross section refers to the cross section This means that the length of one side is longer than the other side.

The supercooling release means 60 of the above embodiment can be configured by arranging mechanical means using a plurality of piezoelectric elements 61, electromagnets and the like in the longitudinal direction, and affects the progress speed of the supercooling release. Therefore, the supercooling can be released and the temperature of the hydraulic oil O can be raised by the release of latent heat accompanying the phase transition of the latent heat storage material 51.
Here, as the energy generation source using the mechanical means in the supercooling release means 60, a pressure-resistant bag disposed in the latent heat storage material 51 of the latent heat storage material container 50 may be hydraulically or pneumatically applied in addition to the above-described energy generation source. There are some which give a displacement to the latent heat storage material 51 by expanding, and some which give a deformation to the internal latent heat storage material 51 by applying pressure to the bag body using the latent heat storage material container 50 as a bag body. Moreover, as a vibration source, the latent heat of the latent heat storage material container 50 is obtained by electromagnetic induction or the like outside the latent heat storage material container 50 such as a metal rod or a metal plate disposed in the latent heat storage material 51 of the latent heat storage material container 50. There is one that adds vibration to the heat storage material 51.

The supercooling release means 60 of the above embodiment can be configured to include a plurality of electrodes arranged in the longitudinal direction or electrical means using long electrodes in the longitudinal direction, and a simple circuit configuration. Since the supercooling can be released and the area and length can be set as appropriate, the degree of freedom in design is high, and the temperature of the hydraulic oil O can be raised by the release of latent heat accompanying the phase transition of the latent heat storage material 51.
The electrode as the supercooling release means 60 applies electrical stimulation or thermal stimulation to the latent heat storage material 51. In the case of electrical stimulation, the latent heat storage material 51 is a conductor (electrolyte). Is desirable. At this time, it is desirable to use alternating current because it may cause electrolysis when stimulated with direct current. The size of the electrode at this time may be an electrode that is long in the length direction of the latent heat storage material container 50, or a plurality of electrodes may be provided in the length direction of the latent heat storage material container 50.

  The supercooling release means 60 of the above embodiment is electromagnetically coupled to the internal member inside the latent heat storage material container 50 from the outside of the latent heat storage material container 50, and the latent heat storage material inside the latent heat storage material container 50. One or more of vibration, agitation, displacement, and deformation is given to 51. Therefore, it is electromagnetically coupled from the outside of the latent heat storage material container 50 to impart any one or more of vibration, movement, displacement and deformation to the latent heat storage material 51 inside the latent heat storage material container 50. The possibility of impurities entering the latent heat storage material 51 inside the latent heat storage material container 50 is eliminated, and stable operation for a long period can be expected.

  Here, latent heat storage means that any one or more of vibration, movement, displacement, and deformation is applied to the latent heat storage material 51 inside the latent heat storage material container 50 by electromagnetically coupling from the outside of the latent heat storage material container 50. It induces from the outside of the material container 50 to cause vibration, movement, displacement and deformation of the latent heat storage material 51 existing inside, thereby unsupercooling.

  The energy generation source that triggers the crystallization of the latent heat storage material 51 of the supercooling release means 60 of the above embodiment is arranged at an interval of 100 mm or less in the longitudinal direction. In particular, since the crystallization of the latent heat storage material 51 proceeds at about 6 mm / s in the experiments by the inventors, the interval of 100 mm or less is the entire crystal in 8 to 9 seconds when crystallization proceeds from both sides. Therefore, the responsiveness can be improved. However, since the speed of the heat conduction is determined by the shape of the container, if the interval is 100 mm or less, for example, 50 mm or 30 mm, the responsiveness to the temperature rise of the hydraulic oil is improved. be able to.

  In the perpendicular direction to the longitudinal direction of the supercooling release means 60 of the above embodiment, the thickness is 100 mm or less. Therefore, the spread in the thickness direction proceeds at a crystallization speed of about 6 mm / s for the latent heat storage material 51. However, in reality, the supercooling release means 60 is usually set at the center because of the trigger surface and the like. Therefore, the distance at which the latent heat storage material 51 is crystallized is less than half of the thickness, the upper and lower intervals are less than half, and heat dissipation and heat conduction in the thickness direction are started in about 8 seconds, and the latent heat storage material is in the initial stage. Since the outward heat transfer path of the container is formed, the responsiveness to the temperature rise of the hydraulic oil can be improved.

The latent heat storage material container 50 of the said embodiment can be made into the Example formed by forming one or more substantially bending parts in the longitudinal direction. That is, since the latent heat storage material container 50 forms a substantially bent portion in its longitudinal direction, the surface area can be increased and the amount of heat transfer to the hydraulic oil O can be increased. Moreover, the effect which suppresses the damage to the latent heat storage material container 50 by the expansion / contraction of the latent heat storage material 51 can be expected.
As described above, in the case where one or more substantially bent portions are formed in the latent heat storage material container 50, the whole may not be an accurate bend such as a bend, or a plurality of bend portions may exist. .

The latent heat storage material container 50 of the said embodiment can be made into the Example formed in the substantially spiral shape. In particular, the surface area can be increased and the heat transfer rate to the hydraulic oil O can be increased.
Thus, the substantially helical latent heat storage material container 50 includes not only those having a central axis in a linear direction but also inclined spirals whose central axes do not intersect with each other at a predetermined angle. That is, the substantially spiral may be any one having a longer distance in the longitudinal direction.

The latent heat storage material container 50 of the above embodiment can be a flexible synthetic resin sealed container. That is, the latent heat storage material container 50 which is a flexible synthetic resin sealed container applies a mechanical external force from the outside of the latent heat storage material container 50 and releases the supercooled state in the length direction. It is possible to increase the progress speed of releasing the supercooled state.
Here, the sealed container of flexible synthetic resin means that the latent heat storage material 51 in the latent heat storage material container 50 is vibrated, moved, displaced, and deformed by external vibration and pressure, and is supercooled. Can be solved. Moreover, since impurities do not enter the latent heat storage material container 50, a long life can be achieved.

The latent heat storage material container 50 of the above-described embodiment can have a smooth surface at least on the inner surface and a sealed synthetic resin container. That is, if the inner surface of the latent heat storage material container 50 is a smooth surface, the latent heat storage material 51 is less likely to be stimulated, and the supercooled state is easily maintained.
Here, since the inner surface of the latent heat storage material container 50 is a smooth surface, the latent heat storage material 51 is less likely to be stimulated, and is thus easily cooled. That is, the form of the latent heat storage material container 50 should just maintain the shape which tends to be in a supercooled state.

The latent heat storage material container 50 of the above embodiment can be an example in which a metal material having a large surface area and a good thermal conductivity is insert-molded. That is, the heat exchange efficiency between the latent heat storage material 51 and the hydraulic oil O can be increased.
In particular, as the latent heat storage material container 50, in terms of heat exchange efficiency, a configuration in which a large surface area is formed and a metal material having good heat conduction is insert-molded to extract heat energy from the latent heat storage material 51. Is desirable.

  Since the latent heat storage material container 50 according to the above embodiment is filled with the latent heat storage material 51 in a state where no gas exists therein, the latent heat storage material container 50 is moved by moving the gas inside the latent heat storage material container 50. It is difficult for the material 51 to receive the stimulation and to cancel the supercooling state, i.e., to cancel the uncooled supercooling state. That is, the reason why the latent heat storage material 51 is filled in the state where no gas is present in the latent heat storage material container 50 is to prevent the supercooled state from being released by the movement of the gas, so the supercooled state is maintained. Anything is possible.

The latent heat storage material container 50 of the above embodiment is disposed on the supply port side for supplying the hydraulic oil O. As described above, in the case where the latent heat storage material container 50 is disposed at the supply port for supplying the hydraulic oil O, the temperature of the hydraulic oil O used in a specific mechanism is quickly increased so as to approach the appropriate temperature from the initial state. The latent heat of the latent heat storage material 51 accommodated in the latent heat storage material container 50 can be used with high efficiency.
In particular, the latent heat storage material container 50 disposed at the supply port for supplying the hydraulic oil O is provided with the latent heat storage material container 50 on the supply port side for supplying the hydraulic oil to a specific mechanism. Is stored in the latent heat storage material container 50, and the temperature of the hydraulic oil used in a specific mechanism is quickly raised to an appropriate temperature by heat exchange between the hydraulic oil O and the supercooled substance that causes phase transition.

The volume of the latent heat storage material 51 of the latent heat storage material container 50 of the above embodiment is reduced by a ratio of 1 to 9 to 1: 1 with respect to the total volume of the hydraulic oil O having a specific function. It can be an example.
Therefore, when the volume of the latent heat storage material 51 of the latent heat storage material container 50 is a volume ratio of 1: 9 to 1: 1 with respect to the whole of the hydraulic oil O having a specific function, the temperature of the hydraulic oil O used in a specific mechanism. Can be raised to a desired temperature by the latent heat storage material 51, and the temperature during operation of the hydraulic oil O having a specific function can be led to a desired temperature range.
That is, the volume of the latent heat storage material 51 in the latent heat storage material container 50 is defined as the volume of the latent heat storage material 51 reduced by a ratio of 1 to 9 to 1 to 1 with respect to the entire hydraulic oil O having a specific function. The temperature of the hydraulic oil O used in this mechanism can be quickly raised to an appropriate temperature, and the temperature of the hydraulic oil having a specific function can be approximated to a desired temperature.

  The volume of the latent heat storage material 51 of the latent heat storage material container 50 of the above embodiment is independent of the latent heat storage material container 50 within a ratio of 1: 9 to 1: 1 with respect to the total volume of the hydraulic oil O having a specific function. Thus, a plurality of controllable embodiments can be obtained. That is, the volume of the latent heat storage material 51 is reduced within a ratio of 1 to 9 to 1 to 1 with respect to the total volume of the hydraulic oil O having a specific function, and the latent heat storage material container 50 can be independently controlled. Therefore, the total volume of the latent heat storage material 51 of the latent heat storage material container 50 occupies a volume ratio of 1: 9 to 1: 1 with respect to the entire hydraulic oil O having a specific function, and is used in a specific mechanism. The initial temperature of the operating oil O can be raised to a desired temperature by the latent heat storage material 51, and the operating temperature of the operating oil O having a specific function can be led to a desired temperature range. Further, since the latent heat storage material container 50 is divided into a plurality of parts, desired control can be performed by controlling the trigger of the latent heat storage material container 50 according to the purpose. In particular, it can be used for target temperature rise, reserve, main control and secondary control.

  That is, by setting the volume of the latent heat storage material 51 of the latent heat storage material container 50 to a ratio of 1: 9 to 1: 1 with respect to the entire hydraulic oil O having a specific function, the hydraulic oil O used in a specific mechanism is used. Thus, the temperature of the hydraulic oil O having a specific function can be approximated to a desired temperature. Further, since the latent heat storage material container 50 is divided into a plurality of parts, desired control can be performed by controlling the trigger of the latent heat storage material container 50 according to the purpose.

In the storage space for storing the latent heat storage material 51 of the latent heat storage material container 50 of the above-described embodiment, a buffer material in which gas is hermetically stored is stored, and the volume change when the latent heat storage material 51 is crystallized is If comprised so that it may absorb with a buffer material, the latent-heat storage material container 50 can be formed with a material with a small expansion coefficient. In particular, it becomes effective when the latent heat storage material container 50 is formed of a material having a low mechanical strength, a fragile material, and a material having a small rigidity and easily deformed.
The latent heat storage material container 50 can also be formed by being hermetically accommodated therein as a material for forming the latent heat storage material container 50. The volume change when the latent heat storage material 51 is crystallized is absorbed by the latent heat storage material container 50, and the latent heat storage material container 50 can be formed of a material having a small expansion coefficient. This is particularly effective when the degree of freedom in selecting the mechanical strength of the latent heat storage material container 50 is high.
In this case, the portion hermetically accommodated in the interior is limited to a portion where heat exchange with the hydraulic oil O is not affected, for example, a portion where the hydraulic oil O does not contact, because heat conduction is deteriorated and heat insulation is improved. Thus, the volume change can be absorbed without reducing the efficiency of heat exchange.

O hydraulic oil 2 oil pan 3 valve body 4 oil strainer 21 bottom 22 wall 41 oil absorption 42 filter 50 latent heat storage material container 51 latent heat storage material 60 supercooling release means 61 piezoelectric element

Claims (8)

A latent heat storage material that is disposed in a circulation path through which the hydraulic oil circulates, allows free heat exchange with the hydraulic oil, and causes phase transition by heat exchange with the hydraulic oil, and contains one of them. A latent heat storage material container having a vertical cross section with respect to the direction as one of a substantially circular shape or a substantially elliptical shape, a substantially semicircular shape, a substantially semielliptical shape, or a substantially polygonal shape that is substantially triangular or more,
When the latent heat storage material is disposed in the latent heat storage material container and the latent heat storage material is in a supercooled state, a plurality of the one direction or a line along the one direction can be freely arranged. A hydraulic oil temperature control device comprising a supercooling release means provided.   The supercooling release means includes an energy generation source that gives energy to the latent heat storage material, and a plurality of the energy generation sources are arranged in the one direction, or are arranged in a line along the one direction. The hydraulic oil temperature control device according to claim 1, wherein   3. The hydraulic oil temperature control device according to claim 2, wherein the energy generation source supplies at least one of vibration, stirring, displacement, deformation, heat, and electricity to the latent heat storage material.   The supercooling release means is electromagnetically coupled to an internal member inside the latent heat storage material container from the outside of the latent heat storage material container, and vibrates and agitates the latent heat storage material inside the latent heat storage material container. The hydraulic oil temperature control device according to any one of claims 1 to 3, wherein any one or more of displacement, deformation, and the like is applied.   The hydraulic oil temperature according to any one of claims 1 to 3, wherein the supercooling release means includes a plurality of electrodes arranged in the one direction or electrodes that are long in the one direction. Control device.   The hydraulic oil temperature control device according to any one of claims 1 to 5, wherein the latent heat storage material container is formed with one or more substantially bent portions in the one direction.   The hydraulic oil temperature control device according to any one of claims 1 to 6, wherein the latent heat storage material container is formed in a substantially spiral shape.   The hydraulic oil temperature control device according to any one of claims 1 to 7, wherein the latent heat storage material container is formed by insert-molding a metal material having good heat conduction to be transmitted to the hydraulic oil. .

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