Heating and cooling device

Abstract

To provide heating and cooling devices such as heat exchangers and radiators with excellent heat exchange efficiency. [Solution] The heating and cooling device 10 is a heat exchanger 11, and includes end plates positioned at both ends, a heat transfer plate 21 that transmits heat from a fluid, a low-temperature channel formed on one side of the heat transfer plate 11 sandwiched between a closing plate 22 through which a low-temperature fluid flows, a high-temperature channel formed on the other side of the heat transfer plate 11 sandwiched between a closing plate 23 through which a high-temperature fluid flows, and a woven mesh 40 positioned in at least one of the low-temperature channel and the high-temperature channel to change the fluid flow. The woven mesh 40 has one or more gaps 50 without intersections formed between the fluid inlet 25 and outlet 26 in the portion 24 sandwiched between the heat transfer plate and the closing plate.

Description

Technical Field

[0001] The present invention relates to heating and cooling devices such as plate heat exchangers and radiators, for example.

Background Art

[0002] Conventionally, heating and cooling devices such as heat exchangers and radiators have been used to adjust the water temperature in aquaculture systems and the like. A heat exchanger is a container-shaped device in which a high-temperature fluid and a low-temperature fluid are separated by a heat transfer plate and have separate inlets and outlets. A radiator is a container-shaped device having an inlet and an outlet for a fluid only on one of the high-temperature fluid side or the low-temperature fluid side, regardless of the presence or absence of a heat transfer plate, based on the structure of the heat exchanger. As a heat exchanger used in an aquaculture system, for example, the technique disclosed in Patent Document 1 is known.

[0003] The aquaculture system of Patent Document 1 includes a pump, a water tank, and a heat exchanger. The pump pumps up seawater, the water tank stores the seawater pumped up by the pump, and the heat exchanger adjusts the water temperature of the seawater pumped up by the pump using at least one of groundwater and seawater different from the seawater. The inlets and outlets of the heat exchanger are located on the side of the heat exchanger, and the flow path of the heat exchanger is connected by a single path from the inlet to the outlet. The groundwater passing through the pipe flows through the flow path from the inlet to the outlet and flows out of the pipe to the outside.

[0004] If the heat exchange efficiency of the heat exchanger is excellent, it is preferable because the size of the entire device can be reduced and the water temperature can be adjusted quickly. However, the heat exchanger of the aquaculture system of Patent Document 1 only has a flow path connected by a single path from the inlet to the outlet, and it cannot be said that the heat exchange efficiency is particularly good. Therefore, as a technique for improving the heat exchange efficiency, the plate heat exchanger of Patent Document 2 is known.

[0005] In the plate-type heat exchanger described in Patent Document 2, a high-temperature heat transfer medium flows through one of the high-temperature heat transfer medium channels formed opposite each other across a heat transfer plate, and a cut plate is arranged as a turbulence promoting means such that the longitudinal direction of the cut plate mesh is perpendicular to the flow direction of the fluid flowing through this channel. In the other low-temperature heat transfer medium channel, a low-temperature heat transfer medium flows, and a cut plate is arranged as a boiling heat transfer promoting means.

[0006] The cutting plates are arranged such that the longitudinal direction of the mesh of the cutting plates is perpendicular to the flow direction of the heat medium flowing through the low-temperature side heat medium channel and the high-temperature side heat medium channel, or such that the longitudinal direction of the mesh of the cutting plates is parallel to the flow direction of the heat medium.

[0007] However, in the case of the cut plate used as a means of promoting turbulence in a plate-type heat exchanger described in Patent Document 2, although turbulence is generated in the flow, it does not actively guide the flow to collide with the heat transfer plates or end plates, so there is room for improvement in improving heat exchange efficiency. Similarly, in the case of the cut plate used as a means of promoting boiling heat transfer, although it increases the number of boiling nuclei formed between the cut plate and the heat transfer plate surface, it does not guide the flow to collide with the heat transfer plates or end plates, so there is also room for improvement in improving heat exchange efficiency.

[0008] Furthermore, in typical flat-plate heat exchangers, when high-temperature and low-temperature fluids flow on opposite sides of a heat transfer plate, the fluid that flows close to the heat transfer plate receives heat from it, while the fluid flowing away from the heat transfer plate simply passes through. To improve this, the following three measures may be taken: 1) Lengthen the heat transfer plate to ensure sufficient fluid mixing time and heat transfer time. 2) Narrow the space between the heat transfer plate so that the fluid flows closer to the heat transfer plate. 3) Reduce the flow rate to ensure sufficient heat transfer residence time for the fluid.

[0009] However, even if the aforementioned measures are taken with a typical flat-plate heat exchanger, the following problems remain: 1) As mentioned above, the equipment becomes larger, and there are practical limitations to the length required. 2) As mentioned above, the equipment becomes more complex and the equipment costs increase, limiting the scope of installation. There is also the drawback that the equipment is prone to failure due to clogging, etc. 3) As mentioned above, the flow rate cannot be increased, limiting the processing capacity. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Japanese Patent Publication No. 2019-208373 [Patent Document 2] Japanese Patent Publication No. 2023-63691 [Overview of the project] [Problems that the invention aims to solve]

[0011] In view of the above, the object of the present invention is to provide a heating and cooling device such as a heat exchanger or radiator with excellent heat exchange efficiency. [Means for solving the problem]

[0012] According to embodiments of the present invention, a heating and cooling device for transferring heat, The heating and cooling device is a heat exchanger, The device comprises a heat transfer plate that transmits heat from a fluid, a low-temperature channel formed on one side of the heat transfer plate sandwiched between two closing plates through which the low-temperature fluid flows, a high-temperature channel formed on the other side of the heat transfer plate sandwiched between two closing plates through which the high-temperature fluid flows, and a woven mesh disposed in at least one of the low-temperature channel and the high-temperature channel, which reciprocates between the heat transfer plate and the closing plate within the channel, colliding with the channel surface of the heat transfer plate and the channel surface of the closing plate to alter the flow of the fluid. The woven net is formed by weaving together a plurality of vertical wire members and a plurality of horizontal wire members so that they overlap and replace each other at adjacent intersections, the opening distance is more than twice the wire diameter, it is positioned between the heat transfer plate and the closing plate, and one or more gaps without intersections are formed between the inlet and outlet of the fluid in the portion sandwiched between the heat transfer plate and the closing plate.

[0013] According to this configuration, the heating and cooling device is a heat exchanger and comprises a low-temperature channel formed on one side of the heat transfer plate, sandwiched between closing plates, through which a low-temperature fluid flows; a high-temperature channel formed on the other side of the heat transfer plate, sandwiched between closing plates, through which a high-temperature fluid flows; and a woven mesh positioned in at least one of the low-temperature channel and the high-temperature channel to change the fluid flow. The woven mesh is formed by weaving together multiple vertical wire members and multiple horizontal wire members so that they overlap and swap at adjacent intersections, and is positioned between the heat transfer plate and the closing plate. As a result, at the intersections of the vertical and horizontal wire members, the distance in the overlapping direction becomes large, blocking the space between the heat transfer plate and the closing plate, and the flow path narrows in the space where there are no vertical wire members (or horizontal wire members) immediately adjacent to the intersection. At the intersections of the vertical and horizontal wire members, the distance in the overlapping direction is equivalent to two wire diameters, and at non-intersections, the distance in the overlapping direction is equivalent to one wire diameter. Therefore, the cross-sectional area of ​​the flow path changes significantly, causing the fluid to forcefully collide with the horizontal wire members (or vertical wire members) and change the direction of flow. The fluid strikes the flow path surface of the closing plate (or heat transfer plate) on the opposite side of the heat transfer plate (or closing plate) on the horizontal wire member (or vertical wire member) side, and heat is transferred from the striking flow path surface, allowing for efficient heat exchange.

[0014] In detail, the heat exchange efficiency of this invention is dramatically improved by the following phenomena: The transverse wire members through which the fluid flow strikes cause minute oscillations as the fluid collides with the heat transfer plate. The vertical wire members parallel to the direction of fluid flow cause minute mixing of the fluid through diversion and merging. As the fluid flows while making minute back-and-forth movements along the thickness of the mesh, the residence time in the heat exchanger is greatly increased, allowing for a sufficiently long heat transfer time. The fluid narrows as it passes through the gap between the transverse wire members and the heat transfer plate, and widens in the mesh space after passing the transverse wire members, resulting in minute narrowing and widening. As a result, the fluid that has absorbed or transferred heat from the heat transfer plate at high velocity in the gap becomes a low-velocity fluid in the mesh space, allowing it to slowly transfer or absorb heat to the closed plate (heat transfer plate) on the opposite side. Furthermore, in the case of a gas, adiabatic expansion occurs when it passes through the gap of the transverse wire members and exits into the mesh space, causing minute cooling of the gas. This results in a synergistic effect of cooling or heating as the gas absorbs or transfers heat at the heat transfer plate. This makes it possible to mitigate problems such as the increasing length and complexity of equipment and the reduction in processing capacity, and to create heat exchangers (heating and cooling devices) with excellent heat exchange efficiency.

[0015] Furthermore, in general heat exchangers (heating and cooling devices), fluid stagnates (becomes a low-velocity flow) at the sides and corners of the portion sandwiched between the heat transfer plate and the closing plate, preventing the effective heat transfer effect from being obtained for the entire heat transfer area. Such fluid stagnation (low-velocity flow) also occurs when a woven mesh is placed over the entire portion sandwiched between the heat transfer plate and the closing plate without any intention. However, in the embodiment of the present invention, the woven mesh forms one or more gap spaces without intersections between the fluid inlet and outlet in the portion sandwiched between the heat transfer plate and the closing plate, thereby promoting flow in areas where stagnation (low-velocity flow) is likely to occur and preventing it. As a result, the flow velocity can be made uniform throughout the entire portion sandwiched between the heat transfer plate and the closing plate, and the heat transfer area can be effectively utilized.

[0016] Preferably, a heating and cooling device that transmits heat, The aforementioned heating and cooling device is a heat sink, The device comprises a heat transfer plate that transmits heat from a fluid, a low-temperature channel formed on one side of the heat transfer plate sandwiched between two closing plates through which the low-temperature fluid flows, a low-temperature solid or high-temperature solid provided on the other side of the heat transfer plate, and a woven mesh placed in the low-temperature channel that reciprocates between the heat transfer plate and the closing plate within the channel, colliding with the channel surface of the heat transfer plate and the channel surface of the closing plate to alter the flow of the fluid. The woven net is formed by weaving together a plurality of vertical wire members and a plurality of horizontal wire members so that they overlap and replace each other at adjacent intersections, the opening distance is more than twice the wire diameter, and it is positioned between the heat transfer plate and the closing plate, and one or more gaps without intersections are formed between the inlet and outlet of the fluid in the portion sandwiched between the heat transfer plate and the closing plate.

[0017] According to this configuration, the heating and cooling device is a heat sink and comprises a heat transfer plate that transmits heat from a fluid, a low-temperature flow path formed on one side of the heat transfer plate sandwiched between closing plates through which a low-temperature fluid flows, a low-temperature solid or high-temperature solid provided on the other side of the heat transfer plate, and a woven mesh placed in the low-temperature flow path to change the fluid flow. The woven mesh is formed by weaving together multiple vertical wire members and multiple horizontal wire members so that they overlap and swap at adjacent intersections, and is placed between the heat transfer plate and the closing plate. As a result, the distance in the overlapping direction increases at the intersections of the vertical and horizontal wire members, blocking the space between the heat transfer plate and the closing plate, and the flow path narrows in the space where there are no vertical wire members (or horizontal wire members) immediately adjacent to the intersection. At the intersections of the vertical and horizontal wire members, the distance in the overlapping direction is equivalent to two wire diameters, and at non-intersections, the distance in the overlapping direction is equivalent to one wire diameter. Therefore, the cross-sectional area of ​​the flow path changes significantly, causing the fluid to forcefully collide with the horizontal wire members (or vertical wire members) and change the direction of flow. The fluid strikes the flow path surface of the closing plate (or heat transfer plate) on the opposite side of the heat transfer plate (or closing plate) on the horizontal wire member (or vertical wire member) side, and heat is transferred from the striking flow path surface, allowing for efficient heat exchange.

[0018] In detail, the heat exchange efficiency of this invention is dramatically improved by the following phenomena: The transverse wire members through which the fluid flow strikes cause minute oscillations as the fluid collides with the heat transfer plate. The vertical wire members parallel to the direction of fluid flow cause minute mixing of the fluid through diversion and merging. As the fluid flows while making minute back-and-forth movements along the thickness of the mesh, the residence time in the radiator is greatly increased, allowing for a sufficiently long heat transfer time. The fluid narrows as it passes through the gap between the transverse wire members and the heat transfer plate, and widens in the mesh space after passing the transverse wire members, resulting in minute narrowing and widening. As a result, the fluid that has absorbed or transferred heat from the heat transfer plate at high velocity in the gap becomes a low-velocity fluid in the mesh space, allowing it to slowly transfer or absorb heat to the closed plate (heat transfer plate) on the opposite side. Furthermore, in the case of a gas, adiabatic expansion occurs when it passes through the gap of the transverse wire members and exits into the mesh space, causing minute cooling of the gas. This results in a synergistic effect of cooling or heating as the gas absorbs or transfers heat at the heat transfer plate. This makes it possible to mitigate problems such as the length and complexity of equipment and the reduction in processing capacity, and to create a heat exchanger (heating and cooling device) with excellent heat exchange efficiency.

[0019] Furthermore, in general heat exchangers (heating and cooling devices), fluid stagnates (becomes a low-velocity flow) at the sides and corners of the portion sandwiched between the heat transfer plate and the closing plate, preventing the effective heat transfer effect from being obtained for the entire heat transfer area. Such fluid stagnation (low-velocity flow) also occurs when a woven mesh is placed over the entire portion sandwiched between the heat transfer plate and the closing plate without any intention. However, in the embodiment of the present invention, the woven mesh forms one or more gap spaces without intersections between the fluid inlet and outlet in the portion sandwiched between the heat transfer plate and the closing plate, thereby promoting flow in areas where stagnation (low-velocity flow) is likely to occur and preventing it. As a result, the flow velocity can be made uniform throughout the entire portion sandwiched between the heat transfer plate and the closing plate, and the heat transfer area can be effectively utilized.

[0020] Preferably, the gap space includes a side gap formed along the side of the portion of the woven mesh sandwiched between the heat transfer plate and the closing plate in a plan view.

[0021] According to such a configuration, the clearance space has side clearances formed along the sides of the portion sandwiched between the heat transfer plate and the closing plate in the plan view of the wire mesh. Therefore, the flow in the vicinity of the sides is promoted to prevent the retention (low-speed flow) of the fluid, the flow velocity throughout the portion sandwiched between the heat transfer plate and the closing plate is made uniform, and the heat transfer area can be effectively utilized.

[0022] Preferably, a plurality of the side clearances are provided at predetermined intervals.

[0023] According to such a configuration, since a plurality of side clearances are provided at predetermined intervals, the degree of freedom in design is improved, the flow in the vicinity of the sides is promoted to prevent the retention (low-speed flow) of the fluid, the flow velocity throughout the portion sandwiched between the heat transfer plate and the closing plate is made uniform, and the heat transfer area can be effectively utilized. [[ID= / / 9]]

[0024] Preferably, the portion sandwiched between the heat transfer plate and the closing plate is formed in a rectangular shape in the plan view of the wire mesh. The clearance space includes an outflow-side corner clearance formed at the corner on the outflow side of the portion sandwiched between the heat transfer plate and the closing plate.

[0025]

[0025] According to such a configuration, the portion sandwiched between the heat transfer plate and the closing plate is formed in a rectangular shape in the plan view of the wire mesh, and the clearance space includes an outflow-side corner clearance formed at the corner on the outflow side of the portion sandwiched between the heat transfer plate and the closing plate. Therefore, the flow to the corner is promoted to prevent the retention (low-speed flow) of the fluid, the flow velocity throughout the portion sandwiched between the heat transfer plate and the closing plate is made uniform, and the heat transfer area can be effectively utilized.

[0026] Preferably, the clearance space includes an inlet clearance formed in the immediate vicinity of the inlet.

[0027] According to such a configuration, since the clearance space includes an inlet clearance formed in the immediate vicinity of the inlet, it is possible to mitigate the occurrence of a pressure loss caused by flowing into the unit and colliding with the horizontal member (or vertical member).

[0028] Preferably, the gap space includes an outlet gap formed in close proximity to the outlet.

[0029] With this configuration, the gap space is equipped with an outlet gap formed immediately adjacent to the outlet, which can mitigate the pressure loss that would occur if the flow were to concentrate all at once at the outlet.

[0030] Preferably, the gap is formed in a plan view of the woven net, including at least one of a rectangle, a triangle, and a circle.

[0031] With this configuration, the gap space is formed by including at least one of a rectangle, a triangle, and a circle in a plan view of the woven mesh, thereby improving the degree of design freedom, promoting flow near the sides to prevent fluid stagnation (low-velocity flow), making the flow velocity uniform throughout the entire portion sandwiched between the heat transfer plate and the closing plate, and effectively utilizing the heat transfer area. [Effects of the Invention]

[0032] This invention provides a heating and cooling device such as a heat exchanger or heat sink with excellent heat exchange efficiency, which can make the flow velocity uniform throughout the entire area sandwiched between the heat transfer plate and the closing plate, and effectively utilize the heat transfer area. [Brief explanation of the drawing]

[0033] [Figure 1] This is an explanatory diagram of an aquaculture system as an example in which the heating and cooling device according to the present invention is employed. [Figure 2] This is an explanatory diagram of the basic structure and basic principle of the heat exchanger (heating and cooling device) according to the present invention. [Figure 3] This is a conceptual diagram showing the fluid flow in a heat exchanger (heating and cooling device) according to the present invention. [Figure 4] This is an explanatory diagram of the basic structure and basic principle of the woven net according to the present invention. [Figure 5] This is a cross-sectional view showing the operation of the heat exchanger (heating and cooling device) according to the present invention. [Figure 6]This is a cross-sectional view of a heat sink (heating and cooling device) according to the present invention. [Figure 7] This is a cross-sectional view of the vertical and horizontal line members according to the present invention. [Figure 8] Figure 8(A) is an explanatory diagram of a conventional heating and cooling device. Figure 8(B) is an explanatory diagram of a comparative example heating and cooling device. [Figure 9] This is an explanatory diagram of the heating and cooling apparatus according to Example 1. [Figure 10] This is an explanatory diagram of the heating and cooling apparatus according to Example 2. [Figure 11] This is an explanatory diagram of the heating and cooling apparatus according to Example 3. [Figure 12] This is an explanatory diagram of the heating and cooling apparatus according to Example 4. [Modes for carrying out the invention]

[0034] Embodiments of the present invention will be described below with reference to the attached drawings. Note that the explanatory diagram of the productivity evaluation system conceptually (schematically) shows an example of its configuration. [Examples]

[0035] As shown in Figure 1, the aquaculture system 60 employing the heating and cooling device 10 is used, for example, for farming fish and crustaceans, and is a land-based aquaculture system located on land near the sea or coast.

[0036] The aquaculture system 60 consists of a tank 61 in which fish and crustaceans can be placed, a physical filter 62, a biological filter 63, a pump 64, a sterilization device 65, and a heating and cooling device 10. The heating and cooling device 10 may be used as a heat exchanger 11 or as a heat radiator 12.

[0037] Here, the heating and cooling device 10 will be described as a heat exchanger 11. The heat exchanger 11 adjusts the water temperature by using, for example, groundwater, which is different from the seawater (river water) pumped up by the pump 64.

[0038] Next, we will explain the basic structure and fundamental principles of the heat exchanger 11 (heating and cooling device 10). Figure 2(A) is a perspective view of the heat exchanger 11, and Figure 2(B) is an exploded perspective view of the heat exchanger 11. Figure 3 is a conceptual diagram showing the fluid flow in the heat exchanger 11. As shown in Figures 2(A) to 3, the heating and cooling device 10 is a heat exchanger 11, which comprises end plates 20 positioned at both ends, heat transfer plates 21 that transmit heat from the fluid, a low-temperature flow path 32 (including the upward arrow in Figure 3) formed on one side of the heat transfer plate 11 sandwiched between closing plates 22 through which a low-temperature fluid flows, a high-temperature flow path 33 (including the downward arrow in Figure 3) formed on the other side of the heat transfer plate 11 sandwiched between closing plates 23 through which a high-temperature fluid flows, and a woven mesh 40 positioned in at least one of the low-temperature flow path 32 and the high-temperature flow path 33 to change the fluid flow.

[0039] Note that, for convenience, the closing plates 22 and 23 are named as closing plates 22 and 23, respectively, to make them easier to distinguish from the heat transfer plate 22. However, their function is the same as the heat transfer plate 22, and it is acceptable to refer to them simply as heat transfer plates.

[0040] Furthermore, in the low-temperature channel 32, the structure in which the low-temperature fluid is guided from the low-temperature inlet 32a, into which the low-temperature fluid of the end plate 20 enters, to the low-temperature channel 32 formed between the heat transfer plate 21 and the closing plate 22 (end plate 20) is a common one, and the detailed structure is omitted from the illustration. Similarly, in the high-temperature channel 33, the structure in which the high-temperature fluid is guided from the high-temperature inlet 33a, into which the high-temperature fluid of the end plate 20 enters, to the high-temperature channel 33 formed between the heat transfer plate 21 and the closing plate 22 (end plate 20) is a common one, and the detailed structure is omitted from the illustration.

[0041] Next, we will explain fluid flow. As shown in Figure 3, the low-temperature fluid enters the end plate 20 through the low-temperature inlet 32a, flows through the tubular low-temperature flow path 32 at the bottom of the figure, enters the tubular low-temperature flow path 32 at the top of the figure, flows through multiple gaps (upward arrows in the figure) where a woven mesh 40 is provided between the heat transfer plate 21 and the closing plate 22 (end plate 20), enters the tubular low-temperature flow path 32 at the top of the figure, and is discharged from the low-temperature outlet 32b.

[0042] The high-temperature fluid enters through the high-temperature inlet 33a of the end plate 20, flows through the tubular high-temperature flow path 33 at the top of the figure, through multiple gaps (downward arrows in the figure) where a woven mesh 40 is provided between the heat transfer plate 21 and the closing plate 23, enters the tubular high-temperature flow path 33 at the bottom of the figure, and is discharged from the high-temperature outlet 33b.

[0043] Next, we will explain the woven net 40. As shown in Figures 4, 5, and 7, the woven net 40 is formed by weaving together multiple vertical wire members 41 and multiple horizontal wire members 42 so that they overlap and swap at adjacent intersections, and is placed between the heat transfer plate 21 and the closing plates 22 and 23. The mesh thickness 42 is the thickness at the intersections where the vertical wire members 41 and the horizontal wire members 42 overlap.

[0044] The woven mesh 40 is in contact with the flow path surface of the heat transfer plate 21 and the flow path surfaces of the closing plates 22 and 23. Furthermore, the woven mesh 40 is arranged such that the vertical wire members 41 or horizontal wire members 42 are perpendicular to the overall fluid flow direction. There are three or more vertical wire members 41 or horizontal wire members 42 perpendicular to the overall fluid flow direction. The material of the woven mesh 40 is either metal, resin, or sintered material.

[0045] The cross-sectional shapes of the vertical wire members 41 and horizontal wire members 42 of the woven mesh 40 are one of the following: circular, elliptical, partially flattened circular, partially flattened elliptical, partially cut circular, or partially cut elliptical. The wire diameter of the woven mesh 40 is, for example, 10 μm to 200 mm. In this embodiment, the wire diameter of the woven mesh 40 is set to 10 μm to 200 mm, but it may be less than 10 μm or greater than 200 mm.

[0046] Furthermore, the pitch 45 of the vertical wire members 41 or horizontal wire members 42 is at least three times the wire diameter 44 of the respective vertical wire members 41 or horizontal wire members 42. As a result, the distance between the openings 46 is at least twice the wire diameter 44.

[0047] In this embodiment, the vertical line member 41 or the horizontal line member 42 is configured to be in contact with the heat transfer plate 21 and the closing plates (heat transfer plates) 22 and 23, respectively. However, the invention is not limited to this configuration, and the vertical line member 41 or the horizontal line member 42 may be configured to be in contact with either the heat transfer plate 21 or the closing plates (heat transfer plates) 22 and 23, or not in contact with either.

[0048] Next, we will explain the function of the woven net 40. As shown in Figure 5, in the heat exchanger 11 (heating and cooling device 10), the low-temperature fluid enters from the low-temperature fluid inlet between the heat transfer plate 21 and the closing plate (heat transfer plate) 22, flows through the gaps in the woven mesh 40, and as indicated by arrow (1), strikes the transverse wire member 42, changes direction, and flows while being pressed against the heat transfer plate 21. Furthermore, as indicated by arrow (2), the low-temperature fluid strikes the transverse wire member 42, changes direction, and flows while being pressed against the closing plate (heat transfer plate) 22. Furthermore, as indicated by arrow (3), the low-temperature fluid strikes the transverse wire member 42, changes direction, and flows while being pressed against the heat transfer plate 21. In this way, the low-temperature fluid is pressed against the flow path surface of the heat transfer plate 21 and the closing plate (heat transfer plate) 22, making it easier to transfer heat and improving the heat exchange efficiency.

[0049] Furthermore, in the heat exchanger 11 (heating and cooling device 10), the high-temperature fluid enters from the high-temperature fluid inlet between the heat transfer plate 21 and the closing plate (heat transfer plate) 23, flows through the gaps in the woven mesh 40, and as shown by arrow (4), it strikes the transverse wire member 42, changes direction, and flows while being pressed against the closing plate (heat transfer plate) 23. Furthermore, as shown by arrow (5), the high-temperature fluid strikes the transverse wire member 42, changes direction, and flows while being pressed against the heat transfer plate 21. Furthermore, as shown by arrow (6), the high-temperature fluid strikes the transverse wire member 42, changes direction, and flows while being pressed against the closing plate (heat transfer plate) 23. In this way, the high-temperature fluid is pressed against the flow path surface of the heat transfer plate 21 and the closing plate (heat transfer plate) 23, making it easier to transfer heat and improving the heat exchange efficiency.

[0050] Next, we will explain the case where the heating and cooling device 10 is a heat sink 12. Note that the structural parts that are the same as those of the heat exchanger 11 will not be explained. As shown in Figure 6, the heating and cooling device 10 is a heat sink 12, comprising a heat transfer plate 21 that transmits heat from a fluid, a low-temperature flow path formed on one side of the heat transfer plate 21 sandwiched between two closing plates 22 through which a low-temperature fluid flows, a low-temperature solid (or high-temperature solid) 47 provided on the other side of the heat transfer plate 21, and a woven mesh 40 placed in the low-temperature flow path to alter the fluid flow. The woven mesh 40 is formed by weaving together a plurality of vertical wire members 41 and a plurality of horizontal wire members 42 so that they overlap and swap at adjacent intersections, and is placed between the heat transfer plate 21 and the closing plate 22.

[0051] Next, the effects of the basic structure and basic principles of the heating and cooling device 10 described above will be explained. Heat exchange can be performed with high efficiency even with small temperature differences. Heat exchange can be performed with high efficiency even with large flow rates, as heat transfer and discharge are minimal. Heat exchange can be performed with high efficiency even with small flow rates and small heat capacity. Gas-liquid phase transformation can be performed with high efficiency. Heating and boiling of liquid fluids can be performed with high efficiency using high-temperature heat sources. Conversely, cooling and condensation of gaseous fluids can be performed with high efficiency using low-temperature heat sources.

[0052] Furthermore, the heating and cooling device is a heat exchanger and comprises a low-temperature channel formed on one side of the heat transfer plate, sandwiched between closing plates, through which a low-temperature fluid flows; a high-temperature channel formed on the other side of the heat transfer plate, sandwiched between closing plates, through which a high-temperature fluid flows; and a woven mesh positioned in at least one of the low-temperature channel and the high-temperature channel to change the fluid flow. The woven mesh is formed by weaving together multiple vertical wire members and multiple horizontal wire members so that they overlap and swap at adjacent intersections, and is positioned between the heat transfer plate and the closing plate. As a result, the distance in the overlapping direction increases at the intersections of the vertical and horizontal wire members, blocking the space between the heat transfer plate and the closing plate, and the flow path narrows in the space immediately adjacent to the intersection where there are no vertical wire members (or horizontal wire members). At the intersections of the vertical and horizontal wire members, the distance in the overlapping direction is equivalent to two wire diameters, and at non-intersections, the distance in the overlapping direction is equivalent to one wire diameter. Therefore, the cross-sectional area of ​​the flow path changes significantly, causing the fluid to forcefully collide with the horizontal wire members (or vertical wire members) and change the direction of flow. The fluid strikes the flow path surface of the closing plate (or heat transfer plate) on the opposite side of the heat transfer plate (or closing plate) on the horizontal wire member (or vertical wire member) side, and heat is transferred from the striking flow path surface, allowing for efficient heat exchange.

[0053] In detail, the heat exchange efficiency of this invention is dramatically improved by the following phenomena: The transverse wire members through which the fluid flow strikes cause minute oscillations as the fluid collides with the heat transfer plate. The vertical wire members parallel to the direction of fluid flow cause minute mixing of the fluid through diversion and merging. As the fluid flows while making minute back-and-forth movements along the thickness of the mesh, the residence time in the heat exchanger is greatly increased, allowing for a sufficiently long heat transfer time. The fluid narrows as it passes through the gap between the transverse wire members and the heat transfer plate, and widens in the mesh space after passing the transverse wire members, resulting in minute narrowing and widening. As a result, the fluid that has absorbed or transferred heat from the heat transfer plate at high velocity in the gap becomes a low-velocity fluid in the mesh space, allowing it to slowly transfer or absorb heat to the closed plate (heat transfer plate) on the opposite side. Furthermore, in the case of a gas, adiabatic expansion occurs when it passes through the gap of the transverse wire members and exits into the mesh space, causing minute cooling of the gas. This results in a synergistic effect of cooling or heating as the gas absorbs or transfers heat at the heat transfer plate. This makes it possible to mitigate problems such as the increasing length and complexity of equipment and the reduction in processing capacity, and to create heat exchangers (heating and cooling devices) with excellent heat exchange efficiency.

[0054] Furthermore, the heating and cooling device is a heat sink and comprises a heat transfer plate that transmits heat from the fluid, a low-temperature channel formed on one side of the heat transfer plate sandwiched between closing plates through which a low-temperature fluid flows, a low-temperature solid or high-temperature solid provided on the other side of the heat transfer plate, and a woven mesh placed in the low-temperature channel to change the fluid flow. The woven mesh is formed by weaving together multiple vertical wire members and multiple horizontal wire members so that they overlap and swap at adjacent intersections, and is placed between the heat transfer plate and the closing plate. As a result, the distance in the overlapping direction increases at the intersections of the vertical and horizontal wire members, blocking the space between the heat transfer plate and the closing plate, and the flow path narrows in the space where there are no vertical wire members (or horizontal wire members) immediately adjacent to the intersection. At the intersections of the vertical and horizontal wire members, the distance in the overlapping direction is equivalent to two wire diameters, and at non-intersections, the distance in the overlapping direction is equivalent to one wire diameter. Therefore, the cross-sectional area of ​​the flow path changes significantly, causing the fluid to forcefully collide with the horizontal wire members (or vertical wire members) and change the direction of flow. The fluid strikes the flow path surface of the closing plate (or heat transfer plate) on the opposite side of the heat transfer plate (or closing plate) on the horizontal wire member (or vertical wire member) side, and heat is transferred from the striking flow path surface, allowing for efficient heat exchange.

[0055] Furthermore, since the woven mesh is in contact with the flow path surface of the heat transfer plate and the flow path surface of the closing plate, the heat transfer efficiency between the woven mesh and the heat transfer plate can be improved, thereby further improving the heat exchange efficiency.

[0056] Furthermore, the overall flow direction of the fluid is the direction in which it would flow if there were no mesh. With this configuration, since the vertical or horizontal members of the mesh are arranged perpendicular to the overall flow direction of the fluid, the direction of flow in a plan view of the mesh can be clearly changed toward the heat transfer plate or closing plate without being dispersed in an oblique direction, thereby improving the heat exchange efficiency.

[0057] Furthermore, since there are three or more vertical or horizontal members perpendicular to the overall fluid flow direction, a larger flow rate can be directed toward the flow path surface by multiple vertical or horizontal members, thereby improving heat exchange efficiency.

[0058] Furthermore, since the woven mesh material can be metal, resin, or sintered material (ceramic), it is possible to improve design flexibility and enhance heat exchange efficiency.

[0059] Furthermore, since the cross-sectional shapes of the vertical and horizontal wire members of the woven mesh are circular, elliptical, partially flattened circular, partially flattened elliptical, partially cut circular, or partially cut elliptical, it is possible to use a woven mesh of the optimal shape according to the size of the heat transfer plate and the distance between the heat transfer plate and the closing plate, thereby increasing the degree of design freedom and improving heat exchange efficiency.

[0060] Furthermore, since the pitch of the vertical or horizontal wire members is at least three times the wire diameter of each member, the distance between the openings becomes at least twice the wire diameter, allowing for a sufficient flow rate to be passed and improving heat exchange efficiency.

[0061] Next, we will explain examples and operations of conventional heating and cooling devices. As shown in Figure 8(A), in a conventional heating and cooling device (heat exchanger) 100, the portion 24 sandwiched between the heat transfer plate and the closing plate is formed in a rectangular shape in plan view. The fluid inlet 25 is located in the central part of one side (opposite side) 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate, and the fluid outlet 26 is located in the central part of one side (opposite side) 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate. In this case, the rectangular corners 29 and the portions along the sides 28 become stagnant areas 39 (or low-velocity flow areas), and effective heat transfer across the heat transfer area cannot be obtained.

[0062] Next, we will explain an example of a heating and cooling device in a comparative example and its operation. As shown in Figure 8(B), the comparative example heating and cooling device (heat exchanger) 10 has a rectangular shape in plan view of the portion 24 sandwiched between the heat transfer plate and the closing plate. The fluid inlet 25 is located in the center of one side (opposite side) 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate, and the fluid outlet 26 is located in the center of one side (opposite side) 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate. The woven mesh 40 is provided over the entire area (entire surface in plan view) of the portion 24 sandwiched between the heat transfer plate and the closing plate. In this case, similar to Figure 8(A), the fluid flow in the stagnant portion 39 is not improved, and the portion along the rectangular corner 29 and side 28 becomes the stagnant portion 39 (or low-velocity flow), and effective heat transfer for the heat transfer area cannot be obtained.

[0063] The heating and cooling apparatus according to Example 1 will now be described. As shown in Figure 9, in the heating and cooling device (heat exchanger) 10 of Embodiment 1, the portion 24 sandwiched between the heat transfer plate and the closing plate in a plan view of the woven mesh 40 is formed in a rectangular shape. The fluid inlet 25 is provided in the central part of one side (opposite side) 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate, and the fluid outlet 26 is provided in the central part of one side (opposite side) 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate. The woven mesh 40 is provided in the portion 24 sandwiched between the heat transfer plate and the closing plate, and one or more gap spaces 50 without intersections are formed between the fluid inlet 25 and the outlet 26 of the portion 24 sandwiched between the heat transfer plate and the closing plate.

[0064] The gap space 50 is equipped with an inlet gap 53 formed immediately adjacent to the inlet 25. The presence of the inlet gap 53 allows the incoming flow to be directed toward the vicinity of the side 27, thereby mitigating pressure loss caused by the flow entering all at once and colliding with the horizontal member 42 (see Figure 4) and the vertical member 41.

[0065] Furthermore, the gap space 50 is equipped with side gaps 51 formed along the side edges 27 of the portion 24 sandwiched between the heat transfer plate and the closing plate in a plan view of the woven net 40, and multiple side gaps 51 are provided at predetermined intervals. The presence of side gaps 51 promotes airflow to the side edges 27. If necessary, the number and size of the side gaps 51 may be changed, and in some cases, gaps equivalent to one or more vertical line members 41 (see Figure 4) or horizontal line members 42 may be partially formed along the side edges 27.

[0066] Furthermore, the gap space 50 includes an outlet-side corner gap 52 formed at the corner 29 on the outlet 26 side of the portion 24 sandwiched between the heat transfer plate and the closing plate. The presence of the outlet-side corner gap 52 promotes flow towards the corner 29.

[0067] Furthermore, the gap space 50 includes an outlet gap 54 formed immediately adjacent to the outlet 26. This helps to mitigate pressure loss caused by the flow concentrating all at once at the outlet 26.

[0068] Next, the heating and cooling apparatus according to Example 2 will be described. As shown in Figure 10, in the heating and cooling device (heat exchanger) 10 of Embodiment 2, the portion 24 sandwiched between the heat transfer plate and the closing plate in a plan view of the woven mesh 40 is formed in a rectangular shape. The fluid inlet 25 is provided at one end of one side (opposite side) 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate, and the fluid outlet 26 is provided at the other end of one side (opposite side) 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate, with the inlet 25 and outlet 26 located diagonally opposite each other. The fluid flows in and out diagonally.

[0069] The woven mesh 40 is provided in the portion 24 sandwiched between the heat transfer plate and the closing plate, and one or more gap spaces 50 without intersections are formed between the fluid inlet 25 and outlet 26 in the portion 24 sandwiched between the heat transfer plate and the closing plate. Since there is only one corner 29 on the outlet side, there is also only one outlet side corner gap 52. As for the side gaps 51, since the inlet side has momentum, the flow is optimally promoted by providing more side gaps 51 on the outlet side.

[0070] Next, the heating and cooling apparatus according to Example 3 will be described. As shown in Figure 11, in the heating and cooling device (heat exchanger) 10 of Embodiment 3, the portion 24 sandwiched between the heat transfer plate and the closing plate in a plan view of the woven mesh 40 is formed in a rectangular shape. Two fluid inlets 25 are provided at both ends of one side (opposite side) 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate, and a fluid outlet 26 is provided at one end of one side 28 of the rectangular portion 24 sandwiched between the heat transfer plate and the closing plate.

[0071] The fluid flows in through two inlets 25 and flows out through one outlet 26. In this case, the size, shape, and number of side gaps 51 can be changed by adjusting the inflow balance for each inlet 25.

[0072] Next, the heating and cooling apparatus according to Example 4 will be described. As shown in Figure 12, in the heating and cooling device (heat exchanger) 10 of Embodiment 3, the portion 24 sandwiched between the heat transfer plate and the closing plate in a plan view of the woven mesh 40 is formed in a rectangular shape. The fluid inlet 25 is provided at one end of the rectangular side 27 of the portion 24 sandwiched between the heat transfer plate and the closing plate, and the fluid outlet 26 is provided at the other end of the side 27 where the inlet 25 is provided.

[0073] Furthermore, the shape of the gap space 50 in plan view may be a triangle or formed along the entire length of the side 27.

[0074] The gap space 50 includes a side gap (full-line gap) 51 formed along the side edge 27 of the portion 24 sandwiched between the heat transfer plate and the closing plate in a plan view of the woven net 40. The side gap (full-line gap) 51 removes the gap by the length of one or more vertical wire members 41 (see Figure 4) or horizontal wire members 42. In the side gap 51, inlet gap 53, and outlet gap 54, the gap space 50 can also be made of only vertical wire members 41. In that case, the horizontal wire members 42 are left, making it easier to stabilize the position of the woven net 40.

[0075] The operation of the heating and cooling device 10 (heat exchanger 11, radiator 12) described above will now be explained. In general, in a heat exchanger (heating and cooling device) 100, fluid stagnates (becomes a low-velocity flow) at the sides 27 and corners 29 of the portion 24 sandwiched between the heat transfer plate and the closing plate, preventing the effective heat transfer effect of the heat transfer area from being obtained. Such fluid stagnation (low-velocity flow) also occurs when a woven mesh 40 is placed over the entire portion sandwiched between the heat transfer plate 21 and the closing plates 22 and 23 without any intention. In this respect, according to the embodiment of the present invention, the woven mesh 40 forms one or more gap spaces 50 without intersections between the fluid inlet 25 and outlet 26 of the portion 24 sandwiched between the heat transfer plate and the closing plate, so that it can promote flow in places where stagnation (low-velocity flow) is likely to occur and prevent stagnation (low-velocity flow). As a result, the flow velocity can be made uniform throughout the entire portion 24 sandwiched between the heat transfer plate and the closing plate, and the heat transfer area can be effectively utilized.

[0076] Furthermore, since the gap space 50 includes a side gap 51 formed along the side edge 27 of the portion 24 sandwiched between the heat transfer plate and the closing plate in a plan view of the woven mesh 40, it promotes flow near the side edge 27, prevents fluid stagnation (low-velocity flow), makes the flow velocity uniform throughout the entire portion 24 sandwiched between the heat transfer plate and the closing plate, and allows for effective use of the heat transfer area.

[0077] Furthermore, since multiple side gaps 51 are provided at predetermined intervals, the degree of design freedom is improved, and the flow near the side 27 is promoted to prevent fluid stagnation (low-velocity flow), the flow velocity is made uniform throughout the entire portion 24 sandwiched between the heat transfer plate and the closing plate, and the heat transfer area can be used effectively.

[0078] Furthermore, in a plan view of the woven mesh 40, the portion 24 sandwiched between the heat transfer plate and the closing plate is formed in a rectangular shape, and the gap space 50 is equipped with an outlet-side corner gap 54 formed at the corner 29 on the outlet 26 side of the portion 24 sandwiched between the heat transfer plate and the closing plate. This promotes flow to the corner 29, prevents fluid stagnation (low-velocity flow), makes the flow velocity uniform throughout the entire portion 24 sandwiched between the heat transfer plate and the closing plate, and allows for effective use of the heat transfer area.

[0079] Furthermore, since the gap space 50 is equipped with an inlet gap 53 formed immediately adjacent to the inlet 25, it is possible to mitigate pressure loss caused by the water flowing in all at once and colliding with the horizontal wire member 42 (or vertical wire member 41).

[0080] Furthermore, since the gap space 50 is equipped with an outlet gap 54 formed immediately adjacent to the outlet 26, it is possible to mitigate the pressure loss that would occur if the flow were to concentrate all at once at the outlet 26.

[0081] Furthermore, since the gap space 50 is formed by including at least one of a rectangle, a triangle, and a circle in a plan view of the woven mesh 40, the degree of design freedom is improved, and the flow near the side edge 27 is promoted to prevent fluid stagnation (low-velocity flow), the flow velocity is made uniform throughout the entire portion 24 sandwiched between the heat transfer plate and the closing plate, and the heat transfer area can be effectively utilized.

[0082] In this embodiment, the woven net 40 is arranged such that the vertical wire members 41 or horizontal wire members 42 are perpendicular to the overall flow direction of the fluid. However, it is not limited to this arrangement, and the vertical wire members 41 or horizontal wire members 42 may be arranged so as to be inclined with respect to the overall flow direction of the fluid.

[0083] In other words, the present invention is not limited to the examples, as long as it achieves the functions and effects of the present invention. [Industrial applicability]

[0084] It is suitable for heating and cooling devices such as heat exchangers and radiators. [Explanation of Symbols]

[0085] 10... Heating / cooling device, 11... Heat exchanger, 12... Heat sink, 20... End plate (heat transfer plate, closing plate), 21... Heat transfer plate, 22... Closing plate (heat transfer plate), 23... Closing plate (heat transfer plate), 24... Part sandwiched between heat transfer plate and closing plate, 25... Outlet, 26... Inlet, 27... Side, 28... One side (opposite side), 29... Corner, 32... Low-temperature flow path, 32a... Low-temperature inlet, 32b... Low-temperature outlet, 33... High-temperature channel, 33a...high-temperature inlet, 33b...high-temperature outlet, 40...woven net, 41...vertical wire member, 42...horizontal wire member, 43...mesh thickness, 44...wire diameter, 45...pitch, 46...opening, 47...low-temperature solid (high-temperature solid, heat sink), 48...abrasion section, 50...gap space, 51...side gap, 52...corner gap (outlet side corner gap), 53...inlet gap, 54...outlet gap, 60...aquaculture system.

Claims

1. A heating and cooling device that transmits heat, The heating and cooling device is a heat exchanger, The device comprises a heat transfer plate that transmits heat from a fluid, a low-temperature channel formed on one side of the heat transfer plate sandwiched between two closing plates through which the low-temperature fluid flows, a high-temperature channel formed on the other side of the heat transfer plate sandwiched between two closing plates through which the high-temperature fluid flows, and a woven mesh disposed in at least one of the low-temperature channel and the high-temperature channel, which reciprocates between the heat transfer plate and the closing plate within the channel, colliding with the channel surface of the heat transfer plate and the channel surface of the closing plate to alter the flow of the fluid. The aforementioned woven net is formed by weaving together a plurality of vertical wire members and a plurality of horizontal wire members so that they overlap and replace each other at adjacent intersections, the opening distance is more than twice the wire diameter, and it is positioned between the heat transfer plate and the closing plate, and one or more gaps without intersections are formed between the inlet and outlet of the fluid in the portion sandwiched between the heat transfer plate and the closing plate.

2. A heating and cooling device that transmits heat, The aforementioned heating and cooling device is a heat sink, The device comprises a heat transfer plate that transmits heat from a fluid, a low-temperature channel formed on one side of the heat transfer plate sandwiched between two closing plates through which the low-temperature fluid flows, a low-temperature solid or high-temperature solid provided on the other side of the heat transfer plate, and a woven mesh placed in the low-temperature channel that reciprocates between the heat transfer plate and the closing plate within the channel, colliding with the channel surface of the heat transfer plate and the channel surface of the closing plate to alter the flow of the fluid. The aforementioned woven net is formed by weaving together a plurality of vertical wire members and a plurality of horizontal wire members so that they overlap and replace each other at adjacent intersections, the opening distance is more than twice the wire diameter, and it is positioned between the heat transfer plate and the closing plate, and one or more gaps without intersections are formed between the inlet and outlet of the fluid in the portion sandwiched between the heat transfer plate and the closing plate.

3. A heating and cooling device according to claim 1 or claim 2, The heating and cooling device is characterized in that the gap space is provided with a side gap formed along the side of the portion of the woven mesh sandwiched between the heat transfer plate and the closing plate in a plan view.

4. A heating and cooling device according to claim 3, The heating and cooling device is characterized in that the aforementioned side gaps are provided in multiple locations at predetermined intervals.

5. A heating and cooling device according to claim 1 or claim 2, In a plan view of the woven net, the portion sandwiched between the heat transfer plate and the closing plate is formed in a rectangular shape. The heating and cooling device is characterized in that the gap space includes an outlet-side corner gap formed at the outlet-side corner of the portion sandwiched between the heat transfer plate and the closing plate.

6. A heating and cooling device according to claim 1 or claim 2, The heating and cooling device is characterized in that the gap space includes an inlet gap formed in close proximity to the inlet.

7. A heating and cooling device according to claim 1 or claim 2, The heating and cooling device is characterized in that the gap space is provided with an outlet gap formed in close proximity to the outlet.

8. A heating and cooling device according to claim 1 or claim 2, The heating and cooling device is characterized in that the gap space is formed to include at least one of a rectangle, a triangle, and a circle in a plan view of the woven net.

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