JP7537702B2 - Radiant panels for heating and cooling - Google Patents

Description

This invention relates to a radiant panel for heating and cooling, and more specifically to a radiant panel for heating and cooling indoor facilities, including gymnasiums.

In recent years, in light of the importance of temperature control in indoor facilities, including gymnasiums, radiant panels have been used as heating and cooling devices that can prevent the generation of unnecessary wind, reduce noise caused by airflow, and reduce the emission of greenhouse gases, which are the main cause of global warming (see, for example, Patent Document 1).

The radiant panel described in Patent Document 1 is a series of multiple hollow vertical pipes (double pipes) arranged from the floor surface along the wall surface, and a low-temperature air layer is formed between the floor surface and the height of the radiant panel by supplying cooling water (heat medium) to the inside of the vertical pipes through a piping path in which cooling water, which is a heat medium, circulates. The radiant panel described in Patent Document 1 can be used for both heating and cooling.

A vertical lattice-shaped ball-stop fence of the same height as the radiation panel is attached to the front of the radiation panel described in Patent Document 1 to prevent damage to the radiation panel due to impact with a ball or the like. In addition, a protective fence is known in which the front cover, side cover, and top cover that cover the front, left and right sides, and top of the radiation panel are formed in a lattice pattern to protect the radiation panel from impact with a ball or the like (see, for example, Patent Document 2).

JP 2015-148357 A Utility Model Registration No. 3215423

However, in both of the devices described in Patent Documents 1 and 2, the lattice fence is located on the front side of the radiation panel, i.e., on the side where the radiant heat (also called radiant heat) is emitted, which raises concerns that this may result in a decrease in heat dissipation performance. In addition, since the fence body is provided separately from the radiation panel, there are concerns that the number of components that impede heat dissipation will increase and that it will be more time-consuming to attach the fence body and set up the radiation panel. Furthermore, with this type of radiation panel, it is desirable to efficiently dissipate the radiant heat (radiant heat) from the heat medium to the front side of the panel.

This invention was made in consideration of the above circumstances, and aims to provide a radiant panel for heating and cooling that reduces the number of components that impede heat dissipation, protects against collisions with balls, etc., and improves the heat dissipation performance of radiant heat (radiation heat).

In order to achieve the above object, the present invention provides a cooling and heating radiant panel that is arranged along the wall surface of an indoor facility, including a gymnasium, and that circulates a heat medium supplied from a heat source inside the indoor facility to radiate cold or warm air, thereby cooling or heating the indoor facility. The radiant panel is equipped with a pair of header pipes facing each other vertically, and a plurality of parallel radiators connected to the header pipes, and the radiator comprises a pipe section that communicates with the header pipes, a straight base that extends from the longitudinal side of the pipe section approximately perpendicular to the pipe section, and a plurality of radiator fins that protrude parallel to each other from both sides of the straight base, and a ball-stopping section is attached to the front end of the straight base of the radiator along the longitudinal direction of the straight base (claim 1).

With this configuration, the radiating panel can be protected from collisions with balls and the like by the ball-proof part attached to the tip of the front side of the straight base of the heat sink. In addition, the straight base and multiple heat sink fins amplify convection in the radiant heat transfer from the tube part through which the heat medium flows, allowing heat to be dissipated to the front surface of the panel.

In this invention, the heat medium may be a gas refrigerant, but it is preferable that the heat medium is a liquid (Claim 2).

When a gas is used as the heat medium, equipment such as an air conditioner or heat exchanger is required to adjust the temperature for cooling and heating, but by using a liquid, temperature adjustment can be made easier. In other words, if a liquid whose steady-state temperature is suitable for cooling, such as water, is used, it only needs to be heated to the specified temperature during heating, making it easy to adjust the temperature with a heat exchanger that only heats.

In addition, in this invention, it is preferable that the ball-stopping portion is attached via a flexible insulating member that fits into the tip of the straight base portion (Claim 3).

This configuration can prevent radiant heat from the heat sink from being transmitted to the ball-stopping section. In addition, the heat insulating material can absorb the impact that the ball-stopping section receives.

In addition, in this invention, it is preferable that the ball-stopping portion is formed hollow and has reinforcing ribs at least on the extension line of the straight base portion (claim 4).

This construction makes the ball-stopping part lightweight and strong.

In addition, in this invention, it is preferable that a bulge protrusion is formed at the tip of the straight base, and the ball-stopping portion has a concave arc-shaped fitting portion that fits into the convex arc-shaped outer peripheral surface of the heat-insulating member that fits into the bulge protrusion of the straight base (claim 5).

This configuration allows the heat insulating member to be firmly attached to the heat sink, and the ball-stopper to be easily and firmly attached to the heat insulating member. In addition, the ball-stopper is displaced by the concave-convex arc-shaped fitting portion, so that shocks received from different angles can be mitigated.

As a result of the above configuration, this invention provides the following notable advantages:

(1) According to the invention described in claims 1 and 2, by attaching a ball-proof part to the tip of the front side of the straight base of the heat sink, the number of components can be reduced and the radiation panel can be protected from collisions with balls and the like. In addition, by amplifying convection in the radiant heat transfer from the tube part through which the heat medium flows by the straight base and multiple heat dissipation fins and dissipating the heat to the front surface of the panel, the heat dissipation performance of the radiant heat (radiation heat) can be improved.

(2) According to the inventions described in claims 3 to 5, the radiant heat from the heat sink can be prevented from being transmitted to the ball-stopping section, and the impact on the ball-stopping section can be absorbed by the insulating material. This not only improves the heat dissipation performance, but also strengthens protection against impacts from balls and the like, i.e. improves durability.

FIG. 2 is a front view showing a cross-section of a portion of the radiating panel according to the present invention and an enlarged view of another portion. 2 is an enlarged cross-sectional view taken along line II in FIG. 1. 3 is a cross-sectional view showing a heat sink and a ball-blocking portion in the present invention. FIG. 2 is a cross-sectional perspective view showing a heat sink and a ball-proof portion in the present invention. FIG. FIG. 4 is a cross-sectional view showing a connection state between an upper header pipe and a heat sink in the present invention. FIG. 6 is a cross-sectional view taken along line II-II in FIG. 5. FIG. 2 is an enlarged cross-sectional view of a portion III in FIG. 1 . FIG. 4 is a cross-sectional view showing an installation state of the drain in the present invention. FIG. 2 is a schematic front view showing an example of a state in which the radiation panel according to the present invention is used.

The following describes in detail the embodiment of the present invention with reference to the attached drawings.

The cooling and heating radiant panel 1 (hereinafter referred to as radiant panel 1) of this invention is arranged along the wall surface of an indoor facility, including a gymnasium, and is used for cooling and heating the indoor facility by circulating a heat medium supplied from a heat source 70 inside and radiating cold or warm air.

As shown in Fig. 1 and Fig. 2, the radiation panel 1 includes a pair of vertical frames 2, an upper frame 3 installed on the upper ends of the vertical frames 2, and a rectangular panel frame 5 formed of a lower frame 4 installed on the lower ends of the vertical frames 2. In the panel frame 5, a pair of upper header pipes 6a and lower header pipes 6b face each other vertically, a plurality of parallel heat sinks 10 (for example, 12 rows) connected to the upper header pipes 6a and the lower header pipes 6b, and a ball-proof part 20 attached to the heat sink 10. The upper end, lower end and middle part of the back surface of the heat sink 10 are held by a horizontal cross-section 7 with a hollow rectangular shape fixed to both vertical frames 2. The upper and lower ends of the plurality of heat sinks 10 are connected and held by a holding plate 17 (see Fig. 6 and Fig. 8). The vertical frames 2, the upper frame 3, the lower frame 4, the horizontal cross-section 7 and the holding plate 17 are made of aluminum alloy members.
Here, the case where 12 rows of heat sinks 10 are arranged has been described, but the number of heat sinks 10 can be arbitrarily set in accordance with the width dimension of the radiating panel 1 .

A heat insulating material 9 having a heat reflector 8 on its surface is attached to the rear part of the panel frame 5. A gutter-shaped drain 30 is arranged below the heat sink 10 on the rear side of the panel frame 5, and is fixed to both vertical frames 2 and the heat insulating material 9. Drain pipes 31 are connected to two points in the center of the drain 30 (see Figures 1 and 8). As shown in Figure 8, the drain 30 is fixed to the heat insulating material 9 by a crank-shaped mounting bracket 30b, a fixing screw 30c, and a nut 30d on a mounting piece 30a provided on one side along the longitudinal direction of the drain 30, and both ends of the drain 30 are fixed to the vertical frame 2 by fixing screws (not shown) that are screwed into screw pockets 30e provided on the drain 30.

As shown in Figures 3 and 4, the heat sink 10 is formed of an aluminum alloy extrusion that is integrated with a pipe section 11 that communicates with the upper header pipe 6a and the lower header pipe 6b, a straight base section 12 that extends from the longitudinal side of the pipe section 11 approximately perpendicular to the pipe section 11, and multiple heat sink fins 13 (e.g., eight on each side) that protrude parallel to each other from both sides of the straight base section 12. Note that the number of heat sink fins 13 does not have to be eight on each side, and may be any number.

In this case, the flow passage of the heat medium in the tube section 11 is provided with a pair of ribs 11a, 11b that protrude into the flow passage from an extension of the straight base section 12, and a pair of ribs 11c, 11d that protrude into the flow passage in a direction perpendicular to the ribs 11a, 11b; 11c, 11d. In this way, by providing two pairs of ribs 11a, 11b; 11c, 11d that are positioned perpendicular to each other in the flow passage of the tube section 11, the heat transfer performance of the heat medium flowing in the flow passage of the tube section 11 can be improved.

In addition, a convex arc-shaped bulging protrusion 12a is provided at the tip of the straight base 12. The heat dissipation fins 13 are formed slightly thinner than the thickness of the straight base 12, and the tip of each heat dissipation fin 13 is formed thick. In addition, the connecting portion 14 between the heat dissipation fin 13 closest to the tube portion 11 and the straight base 12 is thick, and a narrow taper is provided from the straight base 12 to the heat dissipation fin 13. In this way, the connecting portion 14 between the heat dissipation fin 13 closest to the tube portion 11 and the straight base 12 is made thicker than the connecting portions between the other heat dissipation fins 13 and the straight base 12, and a narrow taper is provided toward the heat dissipation fin 13. Since the surface of the heat dissipation fin 13 closest to the tube portion 11 on the tube side has more open space than the other heat dissipation fins 13, the convection heat transfer coefficient is larger than the others, and the connecting portion 14 can be made thicker to improve heat conduction. In addition, by making the tip of each heat dissipation fin 13 thicker, more heat can be transferred from the tip, which has a better convection heat transfer rate than other parts.

In addition, screw pockets 15a and 15b with narrow arc-shaped cross sections are provided at two connection points between the heat dissipation fin 13 on the tip side and the second heat dissipation fin 13 on the tube section 11 side and the straight base 12, at positions that are point symmetrical with respect to the straight base 12. The retaining plate 17 is fixed by screws 17a that are screwed into the screw pockets 15a and 15b (see Figures 6 and 8).

In addition, the insulating rubber 21, which is an insulating member, is fitted to the bulging protrusion 12a formed at the tip of the straight base 12, and the ball-stopping part 20 is fitted to the insulating rubber 21. In this case, as shown in Figures 3 and 4, the insulating rubber 21 is formed in a narrow arc shape that can be fitted to the convex arc-shaped bulging protrusion 12a.

The ball-stopper 20 is formed in a hollow cylindrical shape having a concave arc-shaped fitting portion 20a that can fit into the convex arc-shaped outer peripheral surface of the insulating rubber 21, and a reinforcing rib 20b located on the extension line of the straight base portion 12 of the heat sink 10. Note that the reinforcing rib 20b only needs to be located on at least the extension line of the straight base portion 12, and more reinforcing ribs may be added. This ball-stopper 20 is formed from an extruded aluminum alloy material. In this way, by forming the ball-stopper 20 in a hollow cylindrical shape with the reinforcing rib 20b, the ball-stopper 20 can be made lightweight and strong.

Next, the connection between the tube section 11 of the heat sink 10 and the upper header pipe 6a and the lower header pipe 6b will be described with reference to Figures 5 and 6, taking the connection between the tube section 11 and the upper header pipe 6a as a representative example.

In this case, the upper header pipe 6a is formed from an aluminum extrusion with a rectangular cross section having a circular communication passage 6c, and a stepped through hole 6d is provided at the bottom of the upper header pipe 6a into which the pipe section 11 of the heat sink 10 can be inserted. Blocking members 40 are screwed to the openings at both ends of the upper header pipe 6a in the longitudinal direction, and the upper header pipe 6a is fixed to both vertical frames 2 with fixing screws 41, with the communication passage 6c blocked.

On the other hand, notched steps 16 are provided at the upper and lower ends of the tube section 11 of the heat sink 10, and the tube section 11 is formed in a protruding state from the horizontal section of the notched step 16. The protruding tube section 11 can be inserted through a stepped through hole 6d provided in the upper header pipe 6a via a packing 42 to connect the upper header pipe 6a and the tube section 11. In addition, a third air vent valve 53 is provided at the exhaust ports provided in two places at the top of the upper header pipe 6a.

As described above, the upper header pipe 6a and the pipe section 11 can be easily and firmly connected by inserting the pipe section 11 through the packing 42 into the through hole 6d provided in the upper header pipe 6a, both ends of which are fixed by the vertical frame 2 and the blocking member 40. In other words, since both ends of the upper header pipe 6a are fixed by the vertical frame 2 and the blocking member 40, the upper header pipe 6a can fully withstand the pressure of the heat medium flowing into the upper header pipe 6a, and the upper header pipe 6a and the pipe section 11 can be easily connected without using connecting members such as bolts and nuts.

The lower header pipe 6b is connected to the first header pipe 6b1 and the second header pipe 6b2, which have the same cross-sectional shape as the upper header pipe 6a, by a joint member 6e, and is connected to the pipe section 11 in the same manner as the upper header pipe 6a. That is, the lower header pipe 6b is formed by connecting the first header pipe 6b1 having the inlet side space 6f of the heat medium and the second header pipe 6b2 having the outlet side space 6g of the heat medium by the joint member 6e. The joint member 6e is formed in a U-shaped cross section that holds the first header pipe 6b1 and the second header pipe 6b2, and the upper piece 6h is provided with a slit 6i through which the pipe section 11 can pass. In this case, one end of the first header pipe 6b1 and the second header pipe 6b2 is fixed by the vertical frame 2 and a blocking member (not shown), and the connecting side end of the other end is blocked by a blocking member 40 (see FIG. 7).

The supply pipe 61 is connected to the inlet provided in the inlet space 6f of the lower header pipe 6b via the first air vent valve 51. The discharge pipe 62 is connected to the outlet provided in the outlet space 6g of the lower header pipe 6b via the second air vent valve 52.

By inserting the pipe section 11 through the stepped through-hole 6d provided in the lower header pipe 6b formed as described above, i.e., the first header pipe 6b1 and the second header pipe 6b2, via the packing 42, the connection between the lower header pipe 6b and the pipe section 11 can be easily and firmly established. That is, since both ends of the lower header pipe 6b (first header pipe 6b1, second header pipe 6b2) are fixed by the vertical frame 2 and the blocking member 40, it can fully withstand the pressure of the heat medium flowing into the lower header pipe 6b (6b1, 6b2), and there is no need to use connecting members such as bolts and nuts to connect the lower header pipe 6b (6b1, 6b2) to the pipe section 11, and the connection can be easily established.

Next, an example of a cooling and heating system using a radiant panel 1 will be described with reference to FIG. 1. Here, we will explain the case where a liquid with a steady temperature suitable for cooling (for example, 12°C ± 5°C) is used as a heat medium, such as antifreeze, specifically an antifreeze with a concentration of 23 to 40% that is mainly composed of ethylene glycol and contains a rust inhibitor and is diluted with water.

The heat medium heat source 70 is connected to the supply pipe 61, and is composed of a heat exchanger 73 that heats water during heating via an on-off valve 72 connected to the liquid supply source 71. The discharge pipe 62 is connected to the primary side of the heat exchanger 73 of the supply pipe 61 to form a circulation path. In this case, a filter 74 and a circulation pump 75 are provided in the discharge pipe 62.

In the cooling and heating system configured as described above, during cooling, the antifreeze liquid (heat medium) supplied from the liquid supply source 71 of the heat source 70 flows into the inlet space 6f of the lower header pipe 6b (6b1, 6b2) of the radiation panel 1, flows through the pipe parts 11 of the six rows of heat radiators 10 that communicate with the inlet space 6f, and flows into the upper header pipe 6a. The antifreeze liquid (heat medium) that flows into the upper header pipe 6a flows through the pipe parts 11 of the six rows of heat radiators 10 that communicate with the outlet space 6g, and flows into the outlet space 6g of the lower header pipe 6b.

When the antifreeze liquid (heat medium) flows through the inlet space 6f of the lower header pipe 6b (6b1) of the radiant panel 1 and into the pipe section 11 of the radiator 10, the air in the antifreeze liquid (heat medium) is removed by the first air vent valve 51, the air in the antifreeze liquid (heat medium) that flows into the upper header pipe 6a is removed by the third air vent valve 53, and the air in the antifreeze liquid (heat medium) that flows from the outlet space 6g of the lower header pipe 6b (6b2) to the discharge pipe 62 is removed by the second air vent valve 52.

Therefore, the antifreeze liquid (heat medium) from which the air has been removed flows from the pipe section 11, and the straight base section 12 and the multiple heat dissipation fins 13 amplify the convection of the radiant heat movement, and the heat can be dissipated to the front surface of the radiant panel 1. The heat reflector 8 can suppress the heat loss of the radiant heat dissipated to the rear side from the pipe section 11 located on the rear side. This forms a low-temperature air layer between the floor surface and the height of the radiant panel 1, for example, 2.5 m.

The antifreeze liquid (heat medium) that flows from the discharge space 6g of the lower header pipe 6b (6b2) to the discharge pipe 62 is circulated and supplied by the circulation pump 75 to the supply pipe 61 side after impurities in the antifreeze liquid (heat medium) have been removed by the filter 74. When circulating and supplying the antifreeze liquid (heat medium), the antifreeze liquid (heat medium) may be replenished from the liquid supply source 71.

When using the radiant panel 1 for heating, the antifreeze liquid (heat medium) supplied from the liquid supply source 71 is heated to a predetermined temperature, for example 40°C, by the heat exchanger 73 to generate hot water, and the generated hot water (heat medium) is allowed to flow into the lower header pipe 6b (6b1, 6b2) of the radiant panel 1 in the same manner as described above, thereby allowing the radiant panel 1 to be used for heating.

That is, the hot water (heat medium) flowing into the inlet space 6f of the lower header pipe 6b (6b1) flows through the pipes 11 of the six rows of heat radiators 10 that communicate with the inlet space 6f and into the upper header pipe 6a. The hot water (heat medium) flowing into the upper header pipe 6a flows through the pipes 11 of the six rows of heat radiators 10 that communicate with the outlet space 6g and into the outlet space 6g of the lower header pipe 6b (6b2). At this time, the air in the hot water (heat medium) is removed by the first to third air vent valves 51 to 53.

Therefore, by amplifying convection in the radiant heat transfer from the pipe section 11 through which the hot water (heat medium) from which the air has been removed flows by the straight base section 12 and the multiple heat dissipation fins 13, and dissipating the heat to the front surface of the radiant panel 1, a layer of air for heating is formed between the floor surface and the height of the radiant panel 1.

In the above explanation, one radiation panel 1 was described, but when multiple radiation panels 1 are installed side by side, the supply pipe 61 and the discharge pipe 62 can be connected to the inlet space 6f and the outlet space 6g of the lower header pipe 6b (6b1, 6b2) of each radiation panel 1 as shown in FIG. 9.

According to the embodiment of the radiation panel 1 configured as described above, the ball-proof part 20 is attached to the front end of the straight base 12 of the heat sink 10 via the insulating rubber 21, thereby reducing the number of components that hinder heat dissipation and allowing the insulating rubber 21 to absorb the impact received by the ball-proof part 20, thereby providing enhanced protection against impacts from balls and the like, i.e., improving durability.
In addition, the heat transfer from the pipe section 11 through which the heat medium flows to the straight base section 12 and the multiple heat dissipation fins 13 is amplified by convection and the heat is dissipated to the front surface of the radiating panel 1, thereby improving the heat dissipation performance of the radiant heat (radiated heat).

In addition, the antifreeze (heat medium) from which the air has been removed flows into the upper header pipe 6a through the pipe section 11 of the heat dissipation body 10 that communicates with the inlet space 6f of the lower header pipe 6b (6b1), and then flows from the upper header pipe 6a into the outlet space 6g of the lower header pipe 6b (6b2) through the pipe section 11 of the heat dissipation body 10 that communicates with the outlet space 6g of the lower header pipe 6b (6b2). This makes it possible to suppress the deterioration of the heat dissipation performance of the radiant heat due to air entering the heat dissipation body 10, and also to suppress the disturbance of the temperature distribution of the radiant heat between the upper and lower parts of the heat dissipation body 10.

In the above embodiment, the heat transfer medium is an antifreeze whose steady-state temperature is suitable for cooling, but it is also possible to use pure water instead of antifreeze.

In the above embodiment, the lower header pipe 6b is divided into an inlet side space 6f and an outlet side space 6g, the supply pipe 61 is connected to the inlet side space 6f, and the exhaust pipe 62 is connected to the outlet side space 6g. However, the supply pipe 61 and the exhaust pipe 62 may be connected to the upper header pipe 6a. In other words, the upper header pipe 6a may be divided into an inlet side space 6f and an outlet side space 6g, the supply pipe 61 is connected to the inlet side space 6f, and the exhaust pipe 62 is connected to the outlet side space 6g.

Reference Signs List 1 Radiation panel 6a Upper header pipe 6b Lower header pipe 6b1 First header pipe 6b2 Second header pipe 6c Communication passage 6d Through hole 6e Joint member 6f Inlet side space 6g Outlet side space 10 Heat sink 11 Pipe portion 12 Straight base portion 12a Bulging protrusion 13 Heat sink fin 20 Ball-proof portion 20a Fitting portion 20b Reinforcement rib 21 Heat insulating rubber (heat insulating member)
70 Heat Source

Claims (5)

A cooling and heating radiant panel that is arranged along a wall surface in an indoor facility, such as a gymnasium, and circulates a heat medium supplied from a heat source inside the panel to radiate cold air or warm air, thereby cooling and heating the indoor facility,
The radiation panel includes a pair of header pipes facing each other vertically, and a plurality of radiators connected to the header pipes and parallel to each other,
the heat sink comprises a pipe portion communicating with both of the header pipes, a straight base portion extending from a side surface of the pipe portion in a longitudinal direction substantially perpendicular to the pipe portion, and a plurality of heat sink fins protruding parallel to each other from both side surfaces of the straight base portion,
A ball-stopper is attached to the front end of the straight base of the heat sink along the longitudinal direction of the straight base.
A radiant panel for heating and cooling. The cooling and heating radiant panel according to claim 1,
A cooling and heating radiant panel, characterized in that the heat transfer medium is a liquid. The cooling and heating radiant panel according to claim 1,
A cooling and heating radiant panel characterized in that the ball-proof portion is attached via a flexible insulating member that fits into the tip of the straight base portion. The cooling and heating radiant panel according to claim 1 or 3,
A cooling and heating radiant panel characterized in that the ball-proof portion is formed in a hollow shape having a reinforcing rib at least on an extension line of the straight base portion. The cooling and heating radiant panel according to claim 3 or 4,
A radiant panel for heating and cooling, characterized in that a bulge protrusion is formed at the tip of the straight base, and the ball-proof portion has a concave arc-shaped fitting portion that fits into the convex arc-shaped outer peripheral surface of an insulating member that fits into the bulge protrusion of the straight base.

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