Heat recovery device for gymnasium ice rink

Abstract

The invention discloses a gymnasium ice rink heat recovery device, and relates to the technical field of ice rink heat recovery. In order to filter water in the heat recovery process, the device specifically comprises a treatment part for descaling the inner wall of the expansion water tank, the treatment part comprises a filling pipe and a rotating box, the filling pipe is movably connected to the inner wall of a through hole formed in the top of the expansion water tank, the rotating box is fixed to the bottom of the filling pipe, and material holes are formed in the circumferential outer wall of the rotating box; a support is welded to the side wall of the rotating box, and a hollow cylinder is welded to the inner wall of one side of the support. According to the invention, the filling pipe is driven to rotate, and after the filling pipe rotates to a certain speed, the spring deforms under the action of centrifugal force, so that the chock plug slides for a certain distance relative to the hollow cylinder, and the chock plug is separated from the material hole, so that the descaling agent in the rotating box is thrown out at a high speed through the material hole; further, the descaling agent reacts with scale on the inner wall of the expansion water tank after entering the water body.

Description

Technical Field

[0001] The invention relates to the technical field of ice rink heat recovery, and in particular to a gymnasium ice rink heat recovery device. Background Art

[0002] In the prior art, an ice rink refers to a venue with a flat ice surface formed on a flat ground or water surface. When pouring an ice rink, a refrigeration pipe network is usually set under the pressure-bearing layer of the ice layer. The refrigeration medium in the refrigeration pipe exchanges heat with the pressure-bearing layer to achieve the effect of cooling the pressure-bearing layer. The refrigeration medium after the heat exchange will be collected in a centralized manner, and the heat energy therein will be recycled, that is, waste heat recovery. The heat recovery device of the ice rink includes a constant-pressure expansion water tank. The refrigeration medium after the heat exchange in the refrigeration pipe will be collected in a centralized manner in the constant-pressure expansion water tank. During the long-term use of the expansion water tank, scale will adhere to the inner wall thereof, and the scale will affect the normal recovery of waste heat. Therefore, the scale in the expansion water tank needs to be cleaned. The existing devices mostly directly use bristles to scrub the inner wall of the expansion water tank when cleaning the scale. However, this cleaning method has a cleaning dead angle and cannot guarantee the cleaning efficiency. After searching, the Chinese patent application number 202320881641.7 discloses a heat recovery device for a gymnasium ice rink, including a constant pressure expansion water tank, a sludge pump is installed on the inner bottom wall of the constant pressure expansion water tank, a discharge pipe is installed on the output end of the sludge pump, the lower side of the discharge pipe passes through the inner bottom wall of the constant pressure expansion water tank and extends to the bottom of the constant pressure expansion water tank, a plurality of groups of support rods are fixedly connected to the lower side of the constant pressure expansion water tank, and the lower sides of the plurality of groups of support rods are all fixedly connected to the same filter box.

[0003] A heat recovery device for a gymnasium ice rink in the above patent has the following shortcomings: when cleaning scale, the bristles can only clean the side walls of the expansion water tank, but cannot clean the bottom of the expansion water tank. Therefore, there are dead corners during cleaning, and the cleaning effect of the scale cannot be guaranteed. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a heat recovery device for a gymnasium ice rink.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A heat recovery device for an ice rink in a gymnasium comprises a processing part for descaling the inner wall of an expansion water tank, the processing part comprises a filling pipe and a rotating box, the filling pipe is movably connected to the inner wall of a through hole opened at the top of the expansion water tank, and the rotating box is fixed to the bottom of the filling pipe, a material hole is opened on the circumferential outer wall of the rotating box, and a bracket is welded to the side wall of the rotating box, a hollow cylinder is welded to the inner wall of one side of the bracket, and a plug is movably connected to the inner wall of the hollow cylinder, and a spring is clamped between the inner wall on one side of the plug and the inner wall on one side of the hollow cylinder.

[0006] Preferably: a frame is fixed to the top outer wall of the expansion water tank, and a drive motor is fixed to the top outer wall of the frame, and pulleys are fixed to the output end of the drive motor and the outer wall of the filling pipe by screws, and a synchronous belt is used for transmission between the two pulleys.

[0007] Preferably: a filter screen 1 is fixed on the circumferential inner wall of the expansion water tank, and a through hole opened on the surface of the filter screen 1 is movably connected to a rotating shaft, and a torsion spring is sleeved on the circumferential outer wall of the rotating shaft, and the two ends of the torsion spring are respectively clamped on the bottom of the filter screen 1 and the outer wall of the rotating shaft, and a filter screen 2 is fixed on the circumferential outer wall of the rotating shaft, and the filter screen 2 and the filter screen 1 are staggered.

[0008] Preferably: a scraper is fixed on the inner circumferential wall of the expansion water tank, and the scraper is movably connected to the rotating shaft.

[0009] Preferably: a stirring rod is welded at the bottom of the rotating box, a stirring rope is fixed to the outer wall of the stirring rod by embedding, and a stirring ball is embedded at one end of the stirring rope away from the stirring rod.

[0010] Preferably: a ratchet is connected to the top of the rotating shaft through a key, and a connecting rod is welded to the outer wall of the stirring rod, and a pad is welded to one end of the connecting rod, a through hole opened on the surface of the pad is movably connected to a T-rod, and a ratchet used in conjunction with the ratchet is welded to one end of the T-rod, a spring is sleeved on the outer wall of the T-rod, and two ends of the spring are respectively clamped to the outer wall of one side of the pad and the inner wall of one side of the T-rod.

[0011] Preferably: a fixing rod is fixed to the inner wall of the circumference of the expansion water tank, a protection box is welded between the two fixing rods, the rotating shaft and the protection box are movably connected, and a conical cover is fixed to the top of the protection box.

[0012] On the basis of the above scheme: a pipe 1 is welded on the top of the expansion water tank, and a valve 1 is fixed at one end of the pipe 1.

[0013] Based on the above solution, it is preferred that: a tee is welded at the bottom of the expansion water tank, and a valve 2 and a valve 3 are fixed to the first outlet and the second outlet of the tee respectively.

[0014] Based on the above solution, it is further preferred that: a connecting column is welded at one end of the bracket, a rubber plate is bonded at one end of the connecting column, and bristles are embedded on the surface of the rubber plate.

[0015] The beneficial effects of the present invention are: 1. By driving the filling pipe to rotate, when the filling pipe rotates to a certain speed, the spring is deformed under the action of centrifugal force, so that the plug slides a certain distance relative to the hollow cylinder, and the plug is separated from the material hole, so that the descaling agent in the rotating box is thrown out through the material hole at high speed, and then the descaling agent enters the water body and reacts with the scale on the inner wall of the expansion tank.

[0016] 2. After the filling pipe stops rotating, the plug will reset under the action of the spring's rebound force and seal the material hole, thus preventing the descaling agent in the rotating box from overflowing. 3. The rotating box can drive the stirring ball and stirring rope to rotate when rotating, and use the stirring ball and stirring rope to stir the water body, so that the descaling agent and the water body are mixed after being stirred. 4. Filter 2 scrapes the scale trapped on the top of filter 1 while rotating along the top of filter 1. When filter 2 rotates to overlap with the top of filter 1, the scraped scale falls from the edges of filter 1 and filter 2 to the bottom of the expansion tank under the action of its own gravity.

[0017] 5. A scraper is provided so that when the filter screen 2 rotates relative to the scraper, the scale on the top of the filter screen 2 is scraped off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a heat recovery device for a gymnasium ice rink proposed by the present invention; Figure 2 This is a schematic cross-sectional view of a heat recovery device for a gymnasium ice rink proposed by the present invention; Figure 3 This is a schematic diagram of the main structure of a heat recovery device for a gymnasium ice rink proposed by the present invention; Figure 4 This is a schematic diagram of the main exploded structure of a heat recovery device for a gymnasium ice rink proposed by the present invention; Figure 5 This is a schematic diagram of the exploded structure of a processing unit of a heat recovery device for a gymnasium ice rink proposed by the present invention; Figure 6 This is a schematic diagram of the overall structure of a filter mechanism of a heat recovery device for a gymnasium ice rink proposed by the present invention; Figure 7 This is a schematic diagram of the explosion structure of a filter mechanism of a heat recovery device for a gymnasium ice rink proposed by the present invention; Figure 8 This is a schematic diagram of the main structure of a filter mechanism of a heat recovery device for a gymnasium ice rink proposed by the present invention; Fig. 9 This is a schematic diagram of the structure of a scraping mechanism of a heat recovery device for a gymnasium ice rink proposed in Example 2 of the present invention.

[0019] In the figure: expansion tank 1, frame 2, drive motor 3, pipeline 1, valve 1, valve 1, valve 2, valve 3, tee pipe 8, filling pipe 9, fixing rod 10, filter 1, filter 2, protective box 13, stirring ball 14, bracket 15, rotating box 16, stirring rope 17, hollow cylinder 18, conical cover 19, material hole 20, plug 21, spring 22, ratchet 23, connecting rod 24, stirring rod 25, spring 1, cushion block 27, T-bar 28, ratchet 29, scraper 30, torsion spring 31, rotating shaft 32, brush 33, connecting column 34, rubber sheet 35. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0023] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0024] In addition, the term "plurality" shall mean two or more.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Embodiment 1: A heat recovery device for a gymnasium ice rink, such as Figures 1 to 8 As shown, it includes a processing part for descaling the inner wall of the expansion water tank 1, and the processing part includes a filling pipe 9 and a rotating box 16, the filling pipe 9 is rotatably connected to the inner wall of the through hole opened at the top of the expansion water tank 1, and the rotating box 16 is fixed to the bottom of the filling pipe 9, the outer circumferential wall of the rotating box 16 is provided with a material hole 20, and a bracket 15 is welded to the side wall of the rotating box 16, a hollow cylinder 18 is welded to the inner wall of one side of the bracket 15, and a plug 21 is slidably connected to the inner wall of the hollow cylinder 18, and a spring 22 is clamped between the inner wall of one side of the plug 21 and the inner wall of one side of the hollow cylinder 18; During the heat recovery process, after the hot water enters the expansion water tank 1, scale will adhere to the inner wall of the expansion water tank 1. When the scale needs to be cleaned, a certain amount of descaling agent is injected into the rotating box 16 through the filling pipe 9. When the descaling agent needs to be used to treat the scale, the filling pipe 9 is driven to rotate. When the filling pipe 9 rotates to a certain speed, the spring 22 is deformed under the action of centrifugal force, so that the plug 21 slides a certain distance relative to the hollow cylinder 18. When the plug 21 moves along the hollow cylinder 18, the spring 22 is deformed. When the core cylinder 18 moves outward, the plug 21 is separated from the material hole 20, so that the descaling agent in the rotating box 16 is thrown out at high speed through the material hole 20, and then the descaling agent enters the water body and reacts with the scale on the inner wall of the expansion water tank 1, so that the scale on the inner wall of the expansion water tank 1 is separated from the expansion water tank 1 under the action of the descaling agent. When the filling pipe 9 stops rotating, the plug 21 is reset under the action of the rebound force of the spring 22 to block the material hole 20, thereby avoiding the waste of the descaling agent in the rotating box 16.

[0027] Furthermore, the top outer wall of the expansion water tank 1 is fixed with a frame 2 by bolts, and the top outer wall of the frame 2 is fixed with a drive motor 3 by bolts, and the output end of the drive motor 3 and the outer wall of the filling pipe 9 are fixed with pulleys by screws, and the two pulleys are driven by a synchronous belt; The driving motor 3 can drive the filling pipe 9 to rotate at a high speed by utilizing the transmission effect of the synchronous belt.

[0028] Furthermore, a stirring rod 25 is welded to the bottom of the rotating box 16, and a stirring rope 17 is fixed to the outer wall of the stirring rod 25 by embedding, and a stirring ball 14 is embedded at one end of the stirring rope 17 away from the stirring rod 25; When the rotating box 16 rotates, it can drive the stirring ball 14 and the stirring rope 17 to rotate, and the stirring ball 14 and the stirring rope 17 are used to stir the water body, so that the descaling agent and the water body are mixed after being stirred.

[0029] Further, the circumferential inner wall of the expansion tank 1 is fixed with a filter screen 11 by bolts, and the through hole opened on the surface of the filter screen 11 is rotatably connected with a rotating shaft 32, and the circumferential outer wall of the rotating shaft 32 is sleeved with a torsion spring 31, and the two ends of the torsion spring 31 are respectively clamped at the bottom of the filter screen 11 and the outer wall of the rotating shaft 32, and the circumferential outer wall of the rotating shaft 32 is fixed with a filter screen 12, and the filter screen 12 and the filter screen 11 are staggered. After the water body is descaled by the descaling agent, the removed scale can be filtered and retained by the filter screen 11 and the filter screen 2 12, and the filtered water can be reused. When the removed scale needs to be cleaned, the filter screen 2 12 and the rotating shaft 32 are driven to rotate along the filter screen 1 1. Since the filter screen 2 12 and the filter screen 1 11 are staggered, the filter screen 2 12 scrapes the scale filtered and retained on the top of the filter screen 1 11 during the process of rotating along the top of the filter screen 1 11. The filter screen 2 12 and the filter screen 1 11 have the same size. When the filter screen 2 12 rotates to overlap with the top of the filter screen 1 11, the scraped scale falls from the edges of the filter screen 1 11 and the filter screen 2 12 to the bottom of the expansion water tank 1 under the action of its own gravity, so as to facilitate the subsequent collection of the scale.

[0030] Furthermore, a scraper 30 is fixed to the inner circumferential wall of the expansion tank 1 by bolts, and the scraper 30 is rotatably connected to the rotating shaft 32; In order to facilitate the cleaning of the scale trapped by the filter on the top of the filter screen 12, a scraper 30 is provided so that when the filter screen 12 rotates relative to the scraper 30, the scraper 30 scrapes the scale on the top of the filter screen 12. The scale after scraping falls into the bottom of the expansion water tank 1 through the gap formed between the filter screen 12 and the expansion water tank 1.

[0031] Further, the top of the rotating shaft 32 is connected with a ratchet 23 through a key, and a connecting rod 24 is welded to the outer wall of the stirring rod 25, and a cushion block 27 is welded to one end of the connecting rod 24, a through hole opened on the surface of the cushion block 27 is slidably connected with a T-shaped rod 28, and a ratchet 29 used in conjunction with the ratchet 23 is welded to one end of the T-shaped rod 28, a spring 26 is sleeved on the outer wall of the T-shaped rod 28, and two ends of the spring 26 are respectively clamped to the outer wall of one side of the cushion block 27 and the inner wall of one side of the T-shaped rod 28; During the descaling process of the water body, when the ratchet 29 rotates synchronously with the rotating box 16, the spring 1 26 is deformed under the action of centrifugal force, thereby causing the ratchet 29 and the ratchet wheel 23 to be disengaged from each other, so that the ratchet 23 is in a stationary state and does not move. When it is necessary to collect the scale filtered and intercepted on the filter screen 11 and the filter screen 2 12, when the rotating box 16 stops rotating, the ratchet 29 re-engages with the ratchet wheel 23 under the action of the rebound force of the spring 1 26. At this time, when the driving motor 3 drives the ratchet 29 to rotate at a lower speed, the ratchet 29 drives the ratchet wheel 23 to rotate so that the ratchet wheel 23 drives the filter screen 2 12 and the rotating shaft 32 to rotate during the rotation, thereby enabling the filter screen 2 12 to collect and process the scale during the rotation. The torsion spring 31 is used to ensure that when the ratchet 29 drives the ratchet wheel 23 to rotate in the opposite direction, the filter screen 2 12 is reset under the action of the rebound force of the torsion spring 31.

[0032] Furthermore, a fixing rod 10 is fixed to the inner circumferential wall of the expansion water tank 1 by bolts, a protection box 13 is welded between the two fixing rods 10, and the rotating shaft 32 and the protection box 13 are rotatably connected, and a cone cover 19 is fixed to the top of the protection box 13 by bolts; The ratchet 23 can be covered by the protective box 13 and the conical cover 19, so as to prevent the ratchet 29 from being unable to separate from the ratchet 23 due to the resistance of the water body during the rotation process.

[0033] More preferably, a pipe 1 4 is welded on the top of the expansion water tank 1, and a valve 1 5 is fixed at one end of the pipe 1 4, a tee pipe 8 is welded on the bottom of the expansion water tank 1, and a valve 2 6 and a valve 3 7 are fixed at the first and second outlets of the tee pipe 8 respectively; Pipeline 1 4 and three-way pipe 8 can realize the backflow of water after treatment, so as to realize the recycling of water. During the circulation of water, it is convenient to recover the heat in the water. Valve 1 5, valve 2 6 and valve 3 7 play a throttling role. When it is necessary to collect scale, valve 2 6 is closed and valve 3 7 is opened to allow the scale to be discharged through valve 3 7.

[0034] When the present embodiment is in use, when it is necessary to treat the scale attached to the inner wall of the expansion water tank 1 during the heat recovery process, a certain amount of descaling agent is injected into the rotating box 16 by using the filling pipe 9, and then the rotating box 16 is driven by the driving motor 3 to rotate at a high speed. During the rotation process, the rotating box 16 uses centrifugal force to separate the plug 21 and the material hole 20 from each other, and the descaling agent in the rotating box 16 is thrown out and mixed with the water body. The scale on the inner wall of the expansion water tank 1 is removed by the descaling agent, and the removed scale is mixed with the water body by using the filter. The mesh 11 and the filter 2 12 filter the scale, and the filtered water is discharged through the valve 2 6. When the retained scale needs to be collected, the driving motor 3 is used to drive the filling pipe 9 to rotate at a lower speed. During the rotation, the filling pipe 9 drives the ratchet 29 to drive the ratchet 23 to rotate, so that the filter 2 12 rotates along the top of the filter 11 to scrape and clean the scale on the filter 11, and at the same time, the scraper 30 rotates relative to the filter 2 12 to clean the scale filtered and retained on the filter 2 12.

[0035] Embodiment 2: A heat recovery device for a gymnasium ice rink, such as Fig. 9 As shown, in order to improve the effect of cleaning scale, this embodiment makes the following supplements on the basis of embodiment 1: a connecting column 34 is welded at one end of the bracket 15, and a rubber plate 35 is bonded at one end of the connecting column 34, and bristles 33 are embedded on the surface of the rubber plate 35; The brush 33 is provided to scrape the scale attached to the inner wall of the expansion water tank 1 during the rotation of the rotating box 16, thereby improving the scale cleaning effect.

[0036] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat recovery device for a gymnasium ice rink, comprising a treatment unit for descaling the inner wall of an expansion water tank (1), characterized in that: The processing section comprises a filling pipe (9) and a rotating box (16); the filling pipe (9) is movably connected to the inner wall of a through hole opened at the top of the expansion water tank (1), and the rotating box (16) is fixed to the bottom of the filling pipe (9); a material hole (20) is opened on the circumferential outer wall of the rotating box (16), and a bracket (15) is welded to the side wall of the rotating box (16); a hollow cylinder (18) is welded to the inner wall of one side of the bracket (15), and a plug (21) is movably connected to the inner wall of the hollow cylinder (18), and a spring (22) is clamped between the inner wall of one side of the plug (21) and the inner wall of one side of the hollow cylinder (18).

2. A gymnasium ice rink heat recovery device according to claim 1, characterized in that: A frame (2) is fixed to the top outer wall of the expansion water tank (1), and a drive motor (3) is fixed to the top outer wall of the frame (2), and pulleys are fixed to the output end of the drive motor (3) and the outer wall of the filling pipe (9) via screws, and a synchronous belt is used to transmit power between the two pulleys.

3. The heat recovery device for a gymnasium ice rink according to claim 2, characterized in that: A filter screen 1 (11) is fixed on the circumferential inner wall of the expansion water tank (1), and a through hole provided on the surface of the filter screen 1 (11) is movably connected to a rotating shaft (32), and a torsion spring (31) is sleeved on the circumferential outer wall of the rotating shaft (32), and two ends of the torsion spring (31) are respectively clamped on the bottom of the filter screen 1 (11) and the outer wall of the rotating shaft (32), and a filter screen 2 (12) is fixed on the circumferential outer wall of the rotating shaft (32), and the filter screen 2 (12) and the filter screen 1 (11) are arranged alternately.

4. The heat recovery device for a gymnasium ice rink according to claim 3, characterized in that: A scraper (30) is fixed to the inner circumferential wall of the expansion water tank (1), and the scraper (30) and the rotating shaft (32) are movably connected.

5. The heat recovery device for a gymnasium ice rink according to claim 4, characterized in that: A stirring rod (25) is welded to the bottom of the rotating box (16), and a stirring rope (17) is fixed to the outer wall of the stirring rod (25) by embedding, and a stirring ball (14) is embedded at one end of the stirring rope (17) away from the stirring rod (25).

6. The heat recovery device for a gymnasium ice rink according to claim 5, characterized in that: The top of the rotating shaft (32) is connected to a ratchet (23) via a key, and a connecting rod (24) is welded to the outer wall of the stirring rod (25), and a cushion block (27) is welded to one end of the connecting rod (24). A through hole provided on the surface of the cushion block (27) is movably connected to a T-shaped rod (28), and a ratchet (29) for use with the ratchet (23) is welded to one end of the T-shaped rod (28). A spring (26) is sleeved on the outer wall of the T-shaped rod (28), and two ends of the spring (26) are respectively clamped to the outer wall of one side of the cushion block (27) and the inner wall of one side of the T-shaped rod (28).

7. The heat recovery device for a gymnasium ice rink according to claim 6, characterized in that: A fixing rod (10) is fixed to the inner circumferential wall of the expansion water tank (1), a protection box (13) is welded between the two fixing rods (10), and the rotating shaft (32) and the protection box (13) are movably connected, and a conical cover (19) is fixed to the top of the protection box (13).

8. The heat recovery device for a gymnasium ice rink according to claim 7, characterized in that: A pipeline 1 (4) is welded to the top of the expansion water tank (1), and a valve 1 (5) is fixed to one end of the pipeline 1 (4).

9. The heat recovery device for a gymnasium ice rink according to claim 8, characterized in that: A three-way pipe (8) is welded to the bottom of the expansion water tank (1), and a second valve (6) and a third valve (7) are fixed to the first outlet and the second outlet of the three-way pipe (8), respectively.

10. The heat recovery device for a gymnasium ice rink according to claim 9, characterized in that: A connecting column (34) is welded to one end of the bracket (15), a rubber plate (35) is bonded to one end of the connecting column (34), and bristles (33) are embedded on the surface of the rubber plate (35).

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