Movable cover for heat exchanger and method for moving the movable cover

Abstract

To provide a movable cover for a heat exchanger which can be easily removed and by removing it, can secure a sufficient space for cleaning the heat exchanger, etc. [Solution] The movable cover 1 covers a heat exchanger placed in a bathtub. The movable cover 1 circulates water in the bathtub between the inside and outside of the movable cover 1, and can be moved forward from an initial position covering the heat exchanger by sliding along rails 7 provided in the bathtub. The movable cover 1 has a frame 2, a top plate 3 provided on the frame 2, and a grating 4 provided on the front of the frame 2. The frame 2 has casters 251 that run along the rails 7, and a fixing portion with fixing pieces and bolts 264 for fixing the frame 2 in the initial position.

Description

[Technical Field]

[0001] The present invention relates to a movable cover for a heat exchanger and a method for moving the same. [Background technology]

[0002] Patent Document 1 describes a bathtub in a hot spring facility, accommodation facility, etc., where a heat exchanger that exchanges heat by natural convection is installed in a heat exchanger housing, and the top of the heat exchanger housing is covered with a removable top plate. The top plate can be used as a step when entering the bathtub or as a bench inside the bathtub, and is temporarily removed when performing maintenance such as cleaning the heat exchanger. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-116723 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, only the upper part of the heat exchanger housing can be opened by removing the top plate, which raises concerns that it may be difficult to thoroughly clean the heat exchanger, etc. Furthermore, if a heavy material such as stone is used as the top plate, it becomes a burden to lift the top plate upward.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a movable cover for a heat exchanger that can be easily removed and, when removed, leaves sufficient space for cleaning the heat exchanger, etc. [Means for solving the problem]

[0006] The first invention for solving the above problem is a movable cover that covers a heat exchanger placed in a bathtub, which can circulate water in the bathtub between the inside and outside of the movable cover, and can be moved forward from an initial position covering the heat exchanger by moving along a guide provided in the bathtub, and which has a frame, a top plate provided on the frame, and a surface material provided on the front of the frame, and the frame has a running part that runs along the guide, and a fixing part that can fix and release the frame to fix the frame in the initial position.

[0007] In this invention, the movable cover, which is fixed in an initial position covering the heat exchanger in the bathtub, can be released from the fixation and slid forward along the guide to remove the movable cover from the heat exchanger. In this case, there is no need to lift the top plate upward, and the movable cover can be easily removed without using force. Furthermore, removing the movable cover opens up not only the top but also the front of the heat exchanger, ensuring sufficient space for cleaning the heat exchanger, etc.

[0008] It is desirable that the surface material have a plurality of openings arranged vertically and horizontally to allow water to circulate inside the bathtub. This improves the circulation of water inside and outside the movable cover.

[0009] It is desirable that the fixing portion be a fixing piece provided on the frame that is fixed to a fixing point provided on the bathtub with a bolt. This allows the movable cover to be easily attached and detached.

[0010] It is desirable that a storage section for storing chlorine tablets be provided in a portion of the frame behind the face plate. It is also desirable that the face plate have a plurality of openings arranged vertically and horizontally in the front end portion of the movable cover, a cross member be provided below the frame at the front end portion of the movable cover, the cross member have a horizontal section and a vertical section provided on the horizontal section, and be arranged so that the vertical section faces forward, the storage section be provided in the horizontal section of the cross member, and a notch be provided in the vertical section of the cross member at a position corresponding to the storage section. The storage section allows chlorine tablets for chlorine disinfection to be held in the frame, and the cutouts and openings in the face plate make it easy to see from the front of the movable cover how much chlorine tablets are remaining.

[0011] It is desirable that the guide be a rail provided on the floor of the bathtub, and that the movable cover cover the rail from above when in the initial position. This prevents the rail from being exposed inside the bathtub, improving safety for bathers while bathing.

[0012] The second invention is a method of moving a movable cover of the first invention, characterized in that a jig is used that is placed on the top plate and has an upper arm that extends forward from the top plate and a lower arm that is inserted inside the movable cover, and the front part of the upper arm of the jig is held to lift the front end of the movable cover using the running part as a fulcrum, thereby moving the movable cover forward. By using the above-described jig, the worker does not have to bend over when lifting and sliding the front end of the movable cover using the running part as a fulcrum, thereby reducing the burden on the worker. [Effects of the Invention]

[0013] The present invention can provide a movable cover for a heat exchanger that can be easily removed and that, when removed, can provide sufficient space for cleaning the heat exchanger, etc. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a diagram showing an outline of a movable cover 1. [Figure 2] FIG. 2 is a diagram showing a movable cover 1. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] A diagram showing rail 7. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] 4A to 4C are diagrams illustrating a method for moving the movable cover 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0016] (1. Movable cover 1) 1(a) is a diagram showing an outline of a movable cover 1 according to an embodiment of the present invention. The movable cover 1 of this embodiment is provided to cover a heat exchanger arranged on the floor surface 11 of a bathtub 10 in a hot spring facility, accommodation facility, or the like.

[0017] The bathtub 10 of this embodiment is rectangular in plan view, and the heat exchanger is located in a position surrounded by the walls on three sides of the bathtub 10. In its initial position, the movable cover 1 is positioned so as to cover the top of the heat exchanger and the side of the heat exchanger that does not face the walls. Hereinafter, this side may be referred to as the "front (forward, front, etc.)." It is desirable to keep the gap between the movable cover 1 and the walls of the bathtub 10 as small as possible to prevent bathers from getting their fingers caught.

[0018] As shown by arrow a, the movable cover 1 is capable of circulating hot spring water (hot water) 12, such as hot spring water, in the bathtub 10 between the inside and outside of the movable cover 1. The heat exchanger of this embodiment performs heat exchange by natural convection, and the water 12 in the bathtub 10 is taken into the movable cover 1 from the bottom, heated by the heat exchanger, and then released to the outside from the top of the movable cover 1.

[0019] The movable cover 1 can be used as a step when entering the bathtub 10 or as a bench inside the bathtub 10 during regular bathing hours. On the other hand, when performing maintenance such as cleaning the heat exchanger 20, the movable cover 1 can be moved from its initial position covering the heat exchanger 20 and removed from the heat exchanger 20 by sliding the movable cover 1 forward on the floor 11 of the bathtub 10, as shown in Figure 1(b). This leaves the upper and front of the heat exchanger 20 open, ensuring sufficient space for cleaning the heat exchanger 20.

[0020] 2 to 4 are views showing the movable cover 1. FIG. 2 is a view showing the side of the movable cover 1 as seen from a direction perpendicular to the sliding direction of the movable cover 1 in a plane (hereinafter referred to as the sliding perpendicular direction). FIG. 3 is a view of the movable cover 1 as seen from the front, and FIG. 4 is a view of the movable cover 1 as seen from above. The sliding direction of the movable cover 1 corresponds to the left-right direction in FIGS. 2 and 4 and the direction normal to the paper surface in FIG. 3. The sliding perpendicular direction corresponds to the direction normal to the paper surface in FIG. 2, the left-right direction in FIG. 3 and the up-down direction in FIG. 4.

[0021] The movable cover 1 of this embodiment has a frame 2, a top plate 3, a grating 4, and the like.

[0022] The frame 2 supports the top plate 3 from below. The frame 2 includes cross members 21 (21a, 21b), pillar members 22, beam members 23, connecting members 24, legs 25, receiving members 26, storage members 27, and support members 28. These members are made of relatively easily available steel, such as stainless steel angle iron, to prevent deterioration due to hot spring water 12. However, other materials, such as titanium, can also be used.

[0023] The cross members 21 (21a, 21b) are horizontal members extending in the direction perpendicular to the sliding direction of the movable cover 1. The cross members 21 are arranged above and below the front end of the movable cover 1. The cross member 21 has an L-shaped cross section perpendicular to the longitudinal direction, with one side of the cross section being a horizontal section 211 and the other side being a vertical section 212, and is arranged so that the vertical section 212 faces forward. In the upper cross member 21a, the vertical section 212 is provided below the horizontal section 211, and in the lower cross member 21b, the vertical section 212 is provided above the horizontal section 211. The longitudinal direction of the cross members 21 corresponds to the direction perpendicular to the sliding direction.

[0024] Height adjustment units (adjusters) 5 for keeping the top plate 3 on the frame 2 horizontal are provided at both longitudinal ends of the lower cross member 21b. The height adjustment units 5 are headed bolts, and the heads are placed on the floor surface 11 of the bathtub 10. A pair of nuts 214 are fixed by welding or the like so as to sandwich holes (not shown) provided in the horizontal part 211 of the cross member 21b, and the shanks of the bolts of the height adjustment units 5 are screwed into these nuts 214. By adjusting the degree of tightening, the height of the front end of the movable cover 1 can be adjusted and the top plate 3 can be kept horizontal.

[0025] 3, a notch 213 is provided by cutting the vertical portion 212 from above midway along the longitudinal direction of the lower cross member 21b. The notch 213 is provided at a position corresponding to the storage section 27, which will be described later. In this embodiment, a plurality of notches 213 are provided at intervals along the longitudinal direction of the cross member 21b to match the positions of the storage section 27, but the present invention is not limited to this.

[0026] The pillars 22 are vertical members provided to connect both longitudinal ends of the upper and lower cross members 21a, 21b.

[0027] The beam 23 is a horizontal member that extends rearward from the upper cross member 21a along the sliding direction. "Rear (rear, etc.)" refers to the opposite side of the front end of the movable cover 1 in the sliding direction. As shown in Fig. 4, the beam 23 is provided at positions corresponding to both longitudinal ends of the upper cross member 21a and at a position corresponding to the longitudinal middle portion.

[0028] The connecting member 24 connects the rear ends of the plurality of beam members 23. The connecting member 24 is a horizontal member extending in the direction perpendicular to the slide.

[0029] The upper cross member 21a, girder 23, and connecting member 24 form a mounting portion on which the tabletop 3 is placed. A mounting plate 6 (see FIG. 2) for placing the tabletop 3 is provided on top of the cross member 21a, girder 23, and connecting member 24. The rear end of the mounting plate 6 and both ends perpendicular to the sliding direction are provided with rising portions 61 that rise vertically. The rising portions 61 can protect the peripheral surface of the tabletop 3.

[0030] Top plate 3 is a plate-like member that covers heat exchanger 20 from above. In this embodiment, a stone material such as granite is used for top plate 3. A hanging portion 3a made of the same material as top plate 3 is provided at the front end of top plate 3. Hanging portion 3a is a portion that hangs downward from the front end of top plate 3 and is arranged to cover the front of upper cross member 21a.

[0031] Legs 25 of frame 2 are provided to extend downward from beams 23 at both ends in the direction perpendicular to the sliding direction. Casters 251 are provided at the lower ends of legs 25 for sliding movable cover 1. Ordinary casters 251 have metal bearings, but in this embodiment, resin casters 251 without bearings are used to prevent oil leakage from the bearings and deterioration due to hot spring water 12 when installed inside bathtub 10.

[0032] The casters 251 allow the movable cover 1 to slide along rails 7 provided on the floor surface 11 of the bathtub 10. The casters 251 function as running parts that run along the rails 7. By running the casters 251 along the rails 7, the trajectory during running can be made constant. A pair of rails 7 are provided in the direction perpendicular to the sliding direction.

[0033] FIG. 5 shows the rail 7, showing a horizontal cross section taken along line AA in FIG. 2. The rail 7 is a guide arranged along the sliding direction of the movable cover 1. The sliding direction corresponds to the up-down direction in FIG. 5. The cross section of the rail 7 perpendicular to the longitudinal direction is L-shaped, with a horizontal portion 71 on one side and a vertical portion 72 on the other side. The rail 7 can be made of commercially available L-shaped angle bars made of steel such as stainless steel, and is arranged so that the vertical portion 72 is on the outside in the direction perpendicular to the sliding direction. The "outside in the direction perpendicular to the sliding direction" refers to the side farther from the center of the movable cover 1 in the direction perpendicular to the sliding direction. The casters 251 run on the outside of the rail 7 along the vertical portions 72 in the sliding direction. By running the casters 251 along each of the vertical portions 72 of the pair of rails 7, concerns about rattle during movement are completely eliminated. Repeated insertion and removal of the movable cover 1 prevents damage to the wall of the bathtub 10, ensuring smooth insertion and removal of the movable cover 1. As mentioned above, the gap between the movable cover 1 and the wall of the bathtub 10 is intentionally made small to prevent accidents such as the fingers of bathers getting caught, so this device, which keeps the trajectory of the casters 251 constant when they are moving, works particularly well.

[0034] As shown in Figure 2, when the movable cover 1 is in its initial position, it is positioned so as to cover the rail 7 from above. In other words, when the movable cover 1 is in its initial position, the rail 7 is set to a length that fits within the movable cover 1 and does not protrude forward of the movable cover 1. This prevents the rail 7 from being exposed inside the bathtub 10, improving safety for bathers while bathing and also providing an excellent design.

[0035] The receiving portion 26 of the frame 2 is provided for placing the grating 4. The receiving portion 26 is fixed to the underside of the lower cross member 21b and has a horizontal portion 261 extending forward from the underside, and a rising portion 262 that is formed by raising the front end of the horizontal portion 261 in the vertical direction. The grating 4 is placed on the horizontal portion 261 behind the rising portion 262.

[0036] The receiving portion 26 is provided with a plate-shaped fixing piece 263 (see FIG. 3) that protrudes downward from the horizontal portion 261. The frame 2 can be fixed to the rail 7 using the fixing piece 263.

[0037] 5, a vertically rising end plate 73 is provided at the front end of the rail 7. End plate 73 has a hole 731, and a nut 74 is fixed by welding or the like to the rear surface of end plate 73 at a position corresponding to hole 731. The shank of a headed bolt 264 is inserted from the fixing piece 263 side so as to pass through hole 2631 in fixing piece 263 and hole 731 in end plate 73, and then tightened to the nut 74.

[0038] This fastens the fixed piece 263 to the end plate 73, securing the frame 2 to the rail 7. This securing mechanism effectively prevents various accidents that can occur when a bather accidentally pulls out the movable cover 1. The locked state can be released by removing the bolt 264 from the nut 74. The fixed piece 263 and bolt 264 function as a fixing part for fixing the frame 2 in its initial position, and the end plate 73 functions as a fixing point for fixing the frame 2. By fixing the frame 2 to the end plate 73 at the end of the rail 7, it is not necessary to hammer additional hardware into the bathtub 10 just to secure the frame 2, resulting in a more streamlined fixing mechanism. Although a shock absorber 8 such as a rubber gasket is provided between the fixed piece 263 and the end plate 73, this may be omitted depending on the situation. The shock absorber 8 may be attached to either the fixed piece 263 or the end plate 73, as long as it does not fall off.

[0039] The storage section 27 of the frame 2 is a section for storing chlorine tablets, and is provided behind the grating 4 on the front side of the frame 2. The chlorine tablets are used to supplement the chlorine disinfection of the water 12 in the bathtub 10, such as in a bathtub 10 with free-flowing hot spring water. As the chlorine tablets gradually dissolve in the water 12 and decrease in quantity, additional tablets must be added at appropriate times.

[0040] Fig. 6 is a diagram showing the storage section 27, and is a horizontal cross section taken along line BB in Fig. 3. The storage section 27 is formed by a pair of storage walls 271 in a direction perpendicular to the slide. The direction perpendicular to the slide corresponds to the left-right direction in Fig. 6.

[0041] The storage wall 271 is erected on the horizontal portion 211 of the lower cross member 21b, and is arranged in the vertical direction so as to connect the horizontal portion 211 of the upper cross member 21a and the horizontal portion 211 of the lower cross member 21b. The horizontal cross section of the storage wall 271 is L-shaped, and the pair of storage walls 271 are arranged so that their overall cross section is U-shaped and open forward.

[0042] Chlorine tablets T can be thrown into the storage section 27 from the front of the movable cover 1 through the gap S (see Figures 2 and 3) between the grating 4 and the hanging part 3a of the top plate 3, while the movable cover 1 remains fixed in its initial position. The height of the gap S is set appropriately depending on the size of the chlorine tablets T to be used. This makes it easy to replenish the chlorine tablets T. The thrown chlorine tablets T fall onto the horizontal part 211 of the lower cross member 21b inside the storage section 27.

[0043] As described above, in the direction perpendicular to the slide, the position of the storage section 27 corresponds to the position of the notch 213 of the lower cross member 21b, and the chlorine tablets T on the horizontal part 211 of the cross member 21b can be easily seen from the front of the movable cover 1 through the opening of the grating 4 described below and the notch 213. This makes it possible to see at a glance how much chlorine tablets T are being used up, which helps the manager determine the timing of adding chlorine tablets T.

[0044] The support member 28 of the frame 2 is a member for supporting the grating 4. The support member 28 is a plate-shaped member, and is arranged along the vertical direction so as to connect the upper cross member 21a and the lower cross member 21b.

[0045] The grating 4 is a surface material provided on the front surface of the frame 2. The grating 4 separates the internal space of the movable cover 1 from the external space in front of the movable cover 1. The grating 4 has vertical members 41 and horizontal members 42. Multiple vertical members 41 are provided at intervals in the direction perpendicular to the slide. Multiple horizontal members 42 are provided at intervals above and below. The horizontal members 42 are long members extending in the direction perpendicular to the slide, and are attached to the multiple vertical members 41. In this embodiment, the vertical members 41 and horizontal members 42 are formed from resin.

[0046] The vertical members 41 and horizontal members 42 are arranged in a grid pattern, and in the grating 4, multiple openings surrounded by the vertical members 41 and horizontal members 42 are arranged vertically and horizontally on the elevation. For safety reasons, it is desirable to limit the size of each opening to a size that prevents bathers, including children, from touching the heat exchanger.

[0047] The grating 4 is fixed to the front surface of the frame 2 by attaching the vertical members 41 of the grating 4 to the support members 28 of the frame 2 using mounting fixtures 9.

[0048] In this embodiment, water 12 in the bathtub 10 can circulate between the inside and outside of the movable cover 1 through the gap below the lower cross member 21b, the gap S between the grating 4 and the hanging portion 3a of the top plate 3, and the opening in the grating 4, making natural convection heat exchange possible using the heat exchanger 20.

[0049] (2. How to move the movable cover 1) When removing the movable cover 1 from the heat exchanger 20, the bolts 264 are removed to release the frame 2, and then the bolts of the height adjustment unit 5 are lifted up, and the movable cover 1 is slid while being gently lifted diagonally forward. At this time, the movable cover 1 can also be pulled forward by manually lifting the lower cross member 21b of the frame 2, but this forces the worker cleaning the heat exchanger 20 to bend over, which puts strain on the lower back.

[0050] 7 is used to allow the worker to pull out the movable cover 1 in a comfortable position. The jig 100 is formed by connecting a pair of side frames 200 arranged in parallel with each other with a connecting member 210.

[0051] The side frame 200 comprises an upper arm portion 201 and a lower arm portion 202 connected by a beam 203, and further comprises a leg portion 204 hanging downward from the upper arm portion 201. The upper arm portion 201, the lower arm portion 202, the beam 203, the leg portion 204, and the connecting member 210 can be formed by welding steel material such as square steel pipes. By forming the jig 100 using the same material (such as a square steel pipe), the jig 100 becomes inexpensive and easy to manufacture. Considering the need to weld and fix each member together, square steel pipes are more suitable than circular steel pipes.

[0052] The upper arm 201 and the lower arm 202 are arranged in parallel, and the lower arm 202 is disposed below one portion of the upper arm 201 in the longitudinal direction (corresponding to the portion on the right side in FIG. 7).

[0053] The upper arm portion 201 and the lower arm portion 202 are connected by a bundle 203. A plurality of bundles 203 are provided along the longitudinal direction of the upper arm portion 201. When viewed from these bundles 203, a pillow material 220 is provided on the upper surface of the lower arm portion 202 at the tip side of one longitudinal portion of the upper arm portion 201 (corresponding to the right side in Figure 7).

[0054] The leg 204 is provided so as to extend downward from the other longitudinal portion (corresponding to the left portion in FIG. 7) of the upper arm 201. The lower end of the leg 204 reaches below the lower arm 202.

[0055] The connecting material 210 connects the joints between the bundle 203 and the upper arm portion 201 and the joints between the bundle 203 and the lower arm portion 202 of the pair of side frames 200. The pillow material 220 is provided so as to bridge between the upper surfaces of the lower arm portions 202 of the pair of side frames 200. The connecting material 210 and the pillow material 220 are provided in a direction perpendicular to the upper arm portion 201 in a plane.

[0056] When pulling out movable cover 1, as shown in Fig. 8, the longitudinal direction of upper arm 201 and lower arm 202 is set to the sliding direction (corresponding to the left-right direction in Fig. 8), and the tip of lower arm 202 is inserted into movable cover 1 through gap S between grating 4 and hanging part 3a of top plate 3. At this time, upper arm 201 is placed on top plate 3 and is arranged so as to extend forward from top plate 3.

[0057] The worker holds the front portion of the upper arm 201 with his / her hand as indicated by the symbol P and lifts it up. This allows the worker to lift the front end of the movable cover 1 upward using the caster 251 as a fulcrum without having to bend over. When lifting the movable cover 1, the lower arm 202 of the jig 100 comes into contact with the lower end of the vertical portion 212 of the cross member 21a from below, and the bolster member 220 gets caught on the vertical portion 212 from behind.

[0058] When cleaning the heat exchanger 20, for example, by placing the lower ends of the legs 204 on the floor surface 11, the movable cover 1 can be prevented from moving and from tipping over.

[0059] As described above, according to this embodiment, the movable cover 1, which is fixed in an initial position covering the heat exchanger 20 in the bathtub 10, can be released from the initial position and slid forward along the rails 7 to remove the movable cover 1 from the heat exchanger 20. In this case, there is no need to lift the top plate 3 upward, and the movable cover 1 can be easily removed without using force. This reduces the effort required for maintenance and the risk of injury.

[0060] Furthermore, by removing the movable cover 1, not only the upper part but also the front part of the heat exchanger 20 is open, so that sufficient space can be secured for cleaning the heat exchanger 20. This allows the heat exchanger 20 to be cleaned easily and thoroughly, which further contributes to the public health of the facility.

[0061] In addition, in this embodiment, the grating 4 is installed on the front surface of the frame 2, and the water 12 in the bathtub 10 is circulated through openings provided throughout the grating 4, thereby improving the circulation of the water 12 inside and outside the movable cover 1.

[0062] In this embodiment, the movable cover 1 can be easily fixed and detached by the fixing pieces 263 and the bolts 264.

[0063] In this embodiment, the storage section 27 of the frame 2 allows the frame 2 to hold chlorine tablets T for chlorine disinfection. The cutout 213 and the opening in the grating 4 make it easy to visually check the reduction in the chlorine tablets T from the front of the movable cover 1, which helps the manager determine the timing to add chlorine tablets T.

[0064] In addition, in this embodiment, when the movable cover 1 is in the initial position, it covers the rail 7 from above, so the rail 7 is not exposed inside the bathtub 10, improving safety for the bather while bathing.

[0065] In addition, in this embodiment, by using the jig 100, the worker does not have to bend over when lifting and sliding the front end of the movable cover 1 using the caster 251 as a fulcrum, thereby reducing the burden on the worker.

[0066] However, the present invention is not limited to the above embodiment. For example, in this embodiment, a resin grating 4 is used as the surface material provided on the front surface of the frame 2 because it is not degraded by water 12 such as hot spring water and contributes to reducing the weight of the movable cover 1. However, the material of the grating 4 is not limited to this. For example, wood, stone, ceramic tile, steel such as stainless steel, etc. may also be used. Furthermore, instead of the grating 4, other surface materials with multiple openings arranged vertically and horizontally on the vertical surface may be used. In some cases, a surface material without openings for the flow of water 12 may also be used. However, even when a surface material without openings is used, gaps that allow the flow of water 12 must be provided around the surface material.

[0067] Similarly, in this embodiment, stone is used for the countertop 3 to prevent deterioration due to hot spring water 12, but the material for the countertop 3 is not limited to this and may be any material as long as it is resistant to deterioration and strong enough to be used as a step or bench. For example, wood, ceramic tile, or steel such as SUS could also be used in consideration of harmony with the finish inside the bathtub 10.

[0068] Furthermore, the shape of the frame 2 is not particularly limited, as long as it has a running part that runs along the rail 7, a fixing part that can fix and release the frame 2, and can support the top plate 3 on the frame 2. The fixing part is not limited to the fixing piece 263 and bolt 264 described above. For example, a mechanism may be used in which the frame 2 is fixed by fitting a pin (not shown) provided on the frame 2 into a hole (not shown) provided on the floor surface 11 of the bathtub 10.

[0069] In this embodiment, the heat exchanger 20 is provided in a position surrounded by three walls of the rectangular bathtub 10, but the heat exchanger 20 may also be placed in a position not surrounded by three walls, such as a corner of the bathtub 10. The planar shape of the bathtub 10 is not limited to a rectangular shape, and may be elliptical or circular (perfect circle).

[0070] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications or alterations within the scope of the technical ideas disclosed herein, and it is understood that these modifications also fall within the technical scope of the present invention. [Explanation of symbols]

[0071] 1: Movable cover 2: Frame 3: Top plate 4: Grating 7: Rail 10: Bathtub 11:Floor 12:Water 20: Heat exchanger 21, 21a, 21b: Horizontal members 22: Pillar material 23: Girder material 24: Connecting material 25: Legs 26: Receiving part 27: Storage unit 28: Support material 71, 211, 261: Horizontal part 72, 212: Vertical section 73: End plate 74: Nut 100: Jig 201: Upper arm 202: Lower arm 213: Notch 251: Caster 263: Fixed piece 264: Bolt 271: Containment Wall

Claims

1. A movable cover for covering a heat exchanger disposed in a bathtub, The movable cover can circulate water in the bathtub between the inside and outside, and can be moved forward from its initial position covering the heat exchanger by sliding along a guide provided in the bathtub. The frame and a top plate provided on the frame; a surface material provided on the front surface of the frame; and The frame is a running unit that runs along the guide; a fixing portion for fixing the frame at the initial position and capable of fixing and releasing the frame; A movable cover comprising:

2. 2. The movable cover according to claim 1, wherein the surface material has a plurality of openings arranged vertically and horizontally for circulating water in the bathtub.

3. 2. The movable cover according to claim 1, wherein the fixing portion is configured to fix a fixing piece provided on the frame to a fixing point provided on the bathtub with a bolt.

4. 2. The movable cover according to claim 1, wherein a storage section for storing chlorine tablets is provided in a portion of the frame behind the face plate.

5. In the face material, a plurality of openings for circulating water in the bathtub are arranged vertically and horizontally, A cross member is provided below the frame at the front end of the movable cover, The cross member has a horizontal portion and a vertical portion provided on the horizontal portion, and is arranged so that the vertical portion faces forward, The storage section is provided in the horizontal section of the cross member, 5. The movable cover according to claim 4, wherein a notch is provided in the vertical portion of the cross member at a position corresponding to the storage portion.

6. The guide is a rail provided on the floor surface of the bathtub, The movable cover according to claim 1 , wherein the movable cover covers the rail from above when in the initial position.

7. A method for moving a movable cover according to claim 1, comprising: an upper arm portion disposed on the top plate and extending forward from the top plate; a lower arm portion inserted into the movable cover; Using a jig having A method for moving a movable cover, characterized in that the front part of the upper arm of the jig is held, the front end of the movable cover is lifted using the running part as a fulcrum, and the movable cover is slid forward.

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