A composite heat pipe heat pump snow melting system

Abstract

A composite heat pipe heat pump snow melting system belongs to the field of geothermal application technology. It is used to solve the problem of roads being covered with ice and snow, which aggravates road traffic safety. The underground buried pipe heat extraction unit is pre-buried in the underground soil, and the outlet of the underground buried pipe heat extraction unit is connected to the inlet of the heat pump unit. A circulation pump 1 is installed on the pipeline, and the outlet of the heat pump unit is connected to the inlet of the heat storage tank. The outlet of the heat storage tank is connected to the inlet of the road snow melting unit, and the outlet of the road snow melting unit is connected to the inlet of the underground buried pipe heat extraction unit. A circulation pump 2 is installed on the pipeline, and the road snow melting unit is pre-buried under the road surface. The present invention uses a geothermal source for preheating and a heat pump component for auxiliary heating to transfer soil heat to the ground to achieve the purpose of snow melting. This method can achieve pollution-free and corrosion-free snow melting process. The heat dissipation component and the heat extraction component of the present invention can achieve rapid heat exchange. At the same time, the heat dissipation component and the heat extraction component can also achieve the purpose of shock absorption.

Description

Technical Field

[0001] The present invention belongs to the technical field of geothermal application, and in particular relates to a composite heat pipe heat pump snow melting system. Background Art

[0002] In much of northern my country and parts of southern China, snow falls in winter, covering roads and hindering traffic and aircraft takeoffs from runways. Road safety is significantly reduced in icy and snowy weather, making traffic accidents highly likely. The reason for traffic accidents in icy and snowy weather is that ice and snow cover the road, reducing visibility and lowering the road's adhesion, which can cause driver anxiety. Furthermore, ice and snow also impair braking performance, maneuverability, and hill-climbing capabilities. These factors seriously impact the safety of vehicles on icy and snow-covered roads in winter. Summary of the Invention

[0003] In order to solve the problem of roads being covered with ice and snow, which aggravates road traffic safety, the present invention further provides a composite heat pipe heat pump snow melting system for melting snow and removing ice from the road surface.

[0004] The technical solution adopted by the present invention is:

[0005] A composite heat pipe heat pump snow melting system comprises a heat pump unit, a heat storage tank, a road snow melting unit and an underground buried pipe heat extraction unit; the underground buried pipe heat extraction unit is pre-buried in the underground soil, the outlet of the underground buried pipe heat extraction unit is connected to the inlet of the heat pump unit via a pipeline, and a circulating pump 1 is installed on the pipeline, the outlet of the heat pump unit is connected to the inlet of the heat storage tank, the outlet of the heat storage tank is connected to the inlet of the road snow melting unit, the outlet of the road snow melting unit is connected to the inlet of the underground buried pipe heat extraction unit via a pipeline, and a circulating pump 2 is installed on the pipeline, and the road snow melting unit is pre-buried under the road surface.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] 1. The present invention utilizes geothermal sources for preheating and heat pump components for auxiliary heating to transfer soil heat to the ground to achieve the purpose of melting snow. In this way, the snow melting process can be achieved without pollution or corrosion.

[0008] 2. The heat dissipation component and the heat extraction component of the present invention can realize rapid heat exchange, and at the same time, the heat dissipation component and the heat extraction component can also achieve the purpose of shock absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic structural diagram of the present invention;

[0010] Figure 2 It is a schematic structural diagram of the heat dissipation assembly of the present invention;

[0011] Figure 3 is a side view of the heat dissipation assembly of the present invention;

[0012] Figure 4 This is a schematic diagram of the connection position of the channel tube 1, U-shaped tube 1, and heat dissipation assembly of the present invention;

[0013] Figure 5 This is a schematic structural diagram of the heat extraction component of the present invention;

[0014] Figure 6 This is a schematic diagram of the connection position of the channel tube 2, the U-shaped tube 2, and the heat extraction component of the present invention;

[0015] Among them: 1. Heat pump unit; 2. Heat storage tank; 3. Road snow melting unit; 301. U-shaped pipe (1); 3011. External pipe (1); 3012. Guide plate; 302. Solenoid valve (1); 303. Channel pipe (1); 304. Shock absorber assembly; 3041. Shock absorber pad; 3042. Fixed base plate; 305. Heat dissipation assembly; 3051. Nut (1); 3052. L-shaped pipe (1); 3053. Heat dissipation plate; 3054. Heat transfer plate (1); 3056. Shock absorber block (1); 3057. Water blocking plate; 3058. Spring (1); 4. Adapter box (1); 401. Outlet C; 402. Inlet Port D; 403, inlet C; 404, outlet D; 5. Adapter box 2; 501, outlet A; 502, inlet A; 503, outlet B; 504, inlet B; 6. Underground pipe heating unit; 601, U-shaped tube 2; 6011, external tube 2; 602, solenoid valve 2; 603, channel tube 2; 604, heating assembly; 6041, nut 2; 6042, L-shaped tube 2; 6043, heat conduction plate; 6044, heat transfer plate 2; 6045, slider 2; 6046, shock absorber 2; 6047, spring 2; 7. Circulation pump 1; 8. Circulation pump 2. DETAILED DESCRIPTION

[0016] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0017] like Figures 1 to 6 As shown, the present invention provides a composite heat pipe heat pump snow melting system, comprising a heat pump unit 1, a heat storage tank 2, a road snow melting unit 3 and an underground buried pipe heat extraction unit 6; the underground buried pipe heat extraction unit 6 is pre-buried in the underground soil, the outlet of the underground buried pipe heat extraction unit 6 is connected to the inlet of the heat pump unit 1 through a pipeline, and a circulation pump 7 is installed on the pipeline, the outlet of the heat pump unit 1 is connected to the inlet of the heat storage tank 2, the outlet of the heat storage tank 2 is connected to the inlet of the road snow melting unit 3, the outlet of the road snow melting unit 3 is connected to the inlet of the underground buried pipe heat extraction unit 6 through a pipeline, and a circulation pump 2 8 is installed on the pipeline, and the road snow melting unit 3 is pre-buried under the road surface.

[0018] The circulating working fluid of the snow melting system is ethylene glycol solution with a volume fraction of 47.3%;

[0019] The thermal cycle of the snow melting system is as follows: the underground buried pipe heat extraction unit 6 absorbs heat from the soil, and the ethylene glycol solution in the underground buried pipe heat extraction unit 6 is sent to the heat pump unit 1 by the circulating pump 1 7. After being heated by the heat pump unit 1, it is sent to the road surface snow melting unit 3. The road surface snow melting unit 3 exchanges heat to the ground to be melted, and the cooled ethylene glycol solution is returned to the underground buried pipe heat extraction unit 6 again through the circulating pump 2 8.

[0020] The number of the road snow melting units 3 is at least one group, and multiple groups of road snow melting units 3 are arranged in parallel.

[0021] The heat pump unit 1 can adopt existing technology.

[0022] like Figure 1 As shown, the inlet and outlet of the underground buried pipe heat extraction unit 6 are respectively connected to the outlet A501 and inlet A502 of the transfer box 2 5 through water pipes, and the inlet of the heat pump unit 1 is connected to the outlet B503 of the transfer box 2 5 through a water pipe.

[0023] like Figure 1 As shown, the inlet and outlet of the road snow melting unit 3 are respectively connected to the outlet C401 and inlet C403 of the transfer box 1 4 through water pipes, the outlet of the heat storage tank 2 is connected to the inlet D402 of the transfer box 1 4 through a water pipe, and the outlet D404 of the transfer box 1 4 and the inlet B504 of the transfer box 2 5 are connected by a pipeline.

[0024] like Figures 2 to 4As shown, the road snow melting unit 3 includes a shock absorbing component 304, multiple U-shaped tubes 301, multiple solenoid valves 302, multiple channel tubes 303 and multiple heat dissipation components 305; multiple U-shaped tubes 301 are connected in series to form a connecting tube, which is arranged horizontally, and the inlet of the connecting tube is connected to the outlet C401 of the adapter box 4, and the outlet of the connecting tube is connected to the inlet C403 of the adapter box 4. Multiple channel tubes 303 are connected between the two straight tubes of each U-shaped tube 301, and a channel tube 303 is connected on the straight tube at the water inlet end of the two straight tubes along the water flow direction of each channel tube 303. A solenoid valve 302 is installed at each rear end, making the U-shaped tube 301 a multi-stroke tube. The ethylene glycol solution flows from the straight tube at the water inlet end to the straight tube at the water outlet end through the channel tube 303. The solenoid valve 302 can be used to control whether the straight tube part at the rear is open according to the required snow melting area, thereby changing the heat exchange area, achieving the purpose of rationally utilizing resources, and improving the snow melting efficiency. The upper ends of the two straight tubes of each U-shaped tube 301 are connected to the heat dissipation component 305, which is used to assist the U-shaped tube 301 in dissipating heat. The lower end of each U-shaped tube 301 is connected to the shock absorption component 304.

[0025] like Figures 2 to 4As shown, each of the heat dissipation components 305 includes multiple nuts 3051, multiple L-shaped tubes 3052, multiple heat dissipation plates 3053, multiple heat transfer plates 3054 and multiple shock-absorbing blocks 3056; each straight tube of the U-shaped tube 301 is divided into multiple sections by a solenoid valve 302, and both ends of each section of the tube are provided with external tubes 3011, and both ends of the inner cavity of each section of the tube are provided with guide plates 3012, each of the guide plates 3012 is arranged at the corresponding external tube 3011, and the inclination direction of the guide plates 3012 is set according to the flow direction of the ethylene glycol solution. Each external pipe 3011 is detachably connected to one end of an L-shaped pipe 3052 via a nut 3051. The two L-shaped pipes 3052 corresponding to each pipe section are arranged opposite each other. The other ends of the two L-shaped pipes 3052 are rotatably connected to the corresponding heat sink 3053. The two L-shaped pipes 3052 become the water inlet L-shaped pipe 1 and the water outlet L-shaped pipe 1 along the direction of water flow. Each heat sink 3053 has an inner cavity, and a water blocking plate 3057 is integrally connected to the bottom surface of the inner cavity. A gap is provided between the upper end of the water blocking plate 3057 and the top surface of the inner cavity. The water blocking plate 3057 divides the inner cavity into two chambers. The two chambers are connected by the gap at the upper end. A portion of the ethylene glycol solution in the U-shaped tube 301 enters the inner cavity of the heat sink 3053 through the L-shaped tube 3052, and returns to the U-shaped tube 301 after dissipation of heat through the heat sink 3053. The heat sink 3053 can dissipate the heat brought by the ethylene glycol solution to the ground more quickly. The water blocking plate 3057 is arranged near the water outlet L-shaped tube 3052. Each of the heat sinks 3053 is connected to a heat transfer plate 3054. Each heat transfer plate 3054 is arranged horizontally. A shock absorber 3056 is connected between every two adjacent heat transfer plates 3054.

[0026] An annular protrusion is provided on the other end of the L-shaped tube 3052, and an annular groove is correspondingly provided on the side wall of the heat sink 3053. The L-shaped tube 3052 is rotatably connected to the annular groove of the heat sink 3053 through the annular protrusion, and a sealing gasket is provided between the annular protrusion and the heat sink 3053.

[0027] like Figure 2 、 Figure 3 As shown, the upper surface of each heat dissipation plate 3053 is an arc surface, which is rotatably connected to the arc groove provided on the lower surface of the corresponding heat transfer plate 3054. A groove is provided on the front and rear sides of the upper end of each heat dissipation plate 3053 at the center of the arc surface. A spring 3058 and a slider 3055 are provided in each groove. The slider 3055 is slidably arranged on the outside. The spring 3058 connects the slider 3055 and the groove. The heat transfer plate 3054 has a slot provided at the corresponding position of the slider 3055.

[0028] The heat sink 3053 is connected to the heat transfer plate 1 3054 by inserting the slider 1 3055 into the slot. At the same time, because the upper end of the heat sink 3053 and the heat transfer plate 1 3054 are connected by an arc surface rotation, the non-fixed connection between the heat sink 3053 and the heat transfer plate 1 3054 avoids the entire road snow melting unit 3 being affected by ground vibration.

[0029] like Figure 2 As shown, the shock-absorbing assembly 304 includes a shock-absorbing pad 3041 and a fixed base plate 3042. The fixed base plate 3042 is laid horizontally below the ground. Shock-absorbing pads 3041 are provided between the U-shaped tube 301 and the fixed base plate 3042. These pads are used to reduce vibrations of the road snow melting unit 3. The shock-absorbing pads 3041 can be used to support each U-shaped tube 301 individually or to support all U-shaped tubes 301 as a whole.

[0030] like Figure 5 、 Figure 6 As shown, the underground buried pipe heat extraction unit 6 includes multiple U-shaped tubes 2 601, multiple solenoid valves 2 602, multiple channel tubes 2 603 and multiple heat extraction components 604; the two ends of the multiple U-shaped tubes 2 601 are respectively connected to the outlet A501 and the inlet A502 of the adapter box 2 5 through water pipes, and the multiple U-shaped tubes 2 601 are vertically arranged. Multiple channel tubes 2 603 are connected between the two straight tubes of each U-shaped tube 2 601, and a solenoid valve 2 602 is installed at the lower end of each channel tube 2 603 on the straight tube at the water inlet end of the two straight tubes, so that the U-shaped tube 2 601 forms a multi-stroke tube, and the ethylene glycol solution flows from the straight tube at the water inlet end into the straight tube at the water outlet end through the channel tube 2 603. The solenoid valve 2 602 is used to control whether the straight tube part located below is open, thereby changing the heat exchange area and improving the heat exchange speed. The left and right ends of the two straight tubes of each U-shaped tube 601 are connected to the heat extraction component 604, and the heat extraction component 604 is used to assist the U-shaped tube 601 in dissipating heat.

[0031] like Figure 5 、 Figure 6As shown, each of the heat extraction components 604 includes multiple nuts 6041, multiple L-shaped tubes 6042, multiple heat conduction plates 6043, multiple heat transfer plates 6044 and multiple shock-absorbing blocks 6046; each straight tube of the U-shaped tube 601 is divided into multiple sections by the solenoid valve 602, and two external tubes 6011 are provided on the left and right ends of each section of the tube, and two guide plates 3012 are provided on the left and right ends of the upper and lower ends of the inner cavity of each section of the tube, and each guide plate 3012 is arranged at the corresponding external tube 6011, and the inclination direction of the guide plate 3012 is set according to the flow direction of the ethylene glycol solution. Each external pipe 6011 is detachably connected to one end of an L-shaped pipe 6042 via a nut 6041. The two L-shaped pipes 6042 corresponding to each pipe section are arranged opposite each other. The other end of each L-shaped pipe 6042 is rotatably connected to the corresponding heat conduction plate 6043. The two L-shaped pipes 6042 become the water inlet L-shaped pipe 2 and the water outlet L-shaped pipe 2 along the water flow direction. Each heat conduction plate 6043 has an inner cavity. A portion of the ethylene glycol solution in the second U-shaped tube 601 passes through the second L-shaped tube 6042 and enters the inner cavity of the heat transfer plate 6043. After absorbing heat through the heat transfer plate 6043, it returns to the second U-shaped tube 601. The heat transfer plate 6043 can transfer heat in the soil to the ethylene glycol solution more quickly. Each of the heat transfer plates 6043 is connected to a second heat transfer plate 6044. Each second heat transfer plate 6044 is arranged horizontally, and a second shock absorber block 6046 is connected between every two adjacent second heat transfer plates 6044.

[0032] An annular protrusion is provided on the other end of the L-shaped tube 6042, and an annular groove is correspondingly provided on the side wall of the heat conducting plate 6043. The L-shaped tube 6042 is rotatably connected to the annular groove of the heat conducting plate 6043 through the annular protrusion, and a sealing gasket is provided between the annular protrusion and the heat conducting plate 6043.

[0033] Each heat conducting plate 6043 is rotatably connected to the corresponding heat transfer plate 2 6044 via an arc surface and an arc groove. A groove is provided at the center of the arc surface at the upper and lower ends of each heat conducting plate 6043. A spring 2 6047 and a slider 2 6045 are provided in each groove. The slider 2 6045 is slidably arranged on the outside. The spring 2 6047 connects the slider 2 6045 and the groove. The heat transfer plate 2 6044 has a slot provided at the corresponding position of the slider 2 6045.

[0034] The heat conducting plate 6043 is connected to the second heat transfer plate 6044 by inserting the second slider 6045 into the slot. At the same time, because the upper end of the heat conducting plate 6043 and the second heat transfer plate 6044 are connected by an arc surface rotation, this non-fixed connection between the heat conducting plate 6043 and the second heat transfer plate 6044 prevents the entire underground buried pipe heat extraction unit 6 from being affected by ground vibration.

[0035] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A composite heat pipe heat pump snow melting system, characterized by: The invention comprises a heat pump unit (1), a heat storage tank (2), a road snow melting unit (3) and an underground pipe heat extraction unit (6); the underground pipe heat extraction unit (6) is pre-buried in the underground soil, the outlet of the underground pipe heat extraction unit (6) is connected to the inlet of the heat pump unit (1) through a pipeline, and a circulation pump (7) is installed on the pipeline, the outlet of the heat pump unit (1) is connected to the inlet of the heat storage tank (2), the outlet of the heat storage tank (2) is connected to the inlet of the road snow melting unit (3), the outlet of the road snow melting unit (3) is connected to the inlet of the underground pipe heat extraction unit (6) through a pipeline, and a circulation pump (8) is installed on the pipeline, the road snow melting unit (3) is pre-buried under the road surface, and the road snow melting unit (3) comprises a shock absorbing component (304), a plurality of U-shaped pipes (301), and a plurality of electromagnetic valves (302). , multiple channel tubes (303) and multiple heat dissipation components (305); multiple U-shaped tubes (301) are connected in series in sequence to form a row of tubes, the row of tubes is arranged horizontally, the inlet of the row of tubes is connected to the outlet C (401) of the transfer box (4), and the outlet of the row of tubes is connected to the inlet C (403) of the transfer box (4), multiple channel tubes (303) are connected between the two straight tubes of each U-shaped tube (301), and a solenoid valve (302) is installed at the rear end of each channel tube (303) along the water flow direction on the straight tube at the water inlet end of the two straight tubes, so that the U-shaped tube (301) forms a multi-stroke tube, the upper ends of the two straight tubes of each U-shaped tube (301) are connected to the heat dissipation component (305), and the lower end of each U-shaped tube (301) is connected to the shock absorbing component (304), Each of the heat dissipation components (305) comprises a plurality of nuts (3051), a plurality of L-shaped tubes (3052), a plurality of heat dissipation plates (3053), a plurality of heat transfer plates (3054) and a plurality of shock-absorbing blocks (3056); each straight tube of the U-shaped tube (301) is divided into a plurality of sections by the solenoid valve (302), and both ends of each section of the tube are provided with an external tube (3011), and both ends of the inner cavity of each section of the tube are provided with a guide plate (3012), and each guide plate (3012) is arranged at the corresponding external tube (3011), and each external tube (3011) is detachably connected to one end of an L-shaped tube (3052) via a nut (3051), and each section of the tube corresponds to two L-shaped tubes (3052). The two L-shaped tubes (3052) are arranged relative to each other, and the other ends of the two L-shaped tubes (3052) are rotatably connected to the corresponding heat dissipation plates (3053). The two L-shaped tubes (3052) become the water inlet L-shaped tube (3052) and the water outlet L-shaped tube (3053) respectively along the water flow direction; each heat dissipation plate (3053) is provided with an inner cavity, and a water blocking plate (3057) is integrally connected and arranged on the bottom surface of the inner cavity; a gap is provided between the upper end of the water blocking plate (3057) and the top surface of the inner cavity; the water blocking plate (3057) divides the inner cavity into two chambers, and the two chambers are connected by the gap at the upper end; each heat dissipation plate (3053) is connected to a heat transfer plate (3054); each heat transfer plate (3054) is arranged horizontally, and a shock absorbing block (3056) is connected between every two adjacent heat transfer plates (3054).

2. The composite heat pipe heat pump snow melting system according to claim 1, characterized in that: The inlet and outlet of the underground buried pipe heat extraction unit (6) are respectively connected to the outlet A (501) and the inlet A (502) of the second transfer box (5) through water pipes, and the inlet of the heat pump unit (1) is connected to the outlet B (503) of the second transfer box (5) through a water pipe.

3. The composite heat pipe heat pump snow melting system according to claim 2, characterized in that: The inlet and outlet of the road snow melting unit (3) are connected to the outlet C (401) and inlet C (403) of the transfer box 1 (4) respectively through water pipes, the outlet of the heat storage tank (2) is connected to the inlet D (402) of the transfer box 1 (4) through a water pipe, and the outlet D (404) of the transfer box 1 (4) and the inlet B (504) of the transfer box 2 (5) are connected through a pipeline.

4. The composite heat pipe heat pump snow melting system according to claim 1, characterized in that: The upper surface of each heat dissipation plate (3053) is an arc surface, which is rotatably connected to the arc groove provided on the lower surface of the corresponding heat transfer plate (3054). A groove is provided at the center of the arc surface on the front and rear sides of the upper end of each heat dissipation plate (3053). A spring (3058) and a slider (3055) are provided in each groove. The slider (3055) is slidably arranged on the outside. The spring (3058) connects the slider (3055) and the groove. The heat transfer plate (3054) has a slot provided at the corresponding position of the slider (3055).

5. The composite heat pipe heat pump snow melting system according to claim 1, characterized in that: The shock-absorbing assembly (304) comprises a shock-absorbing pad (3041) and a fixed base plate (3042); the fixed base plate (3042) is horizontally laid below the ground, and a shock-absorbing pad (3041) is provided between the U-shaped tube (301) and the fixed base plate (3042).

6. The composite heat pipe heat pump snow melting system according to claim 3, characterized in that: The underground buried pipe heat extraction unit (6) includes a plurality of U-shaped tubes (601), a plurality of solenoid valves (602), a plurality of channel tubes (603) and a plurality of heat extraction components (604); the two ends of the plurality of U-shaped tubes (601) are respectively connected to the outlet A (501) and the inlet A (502) of the transfer box (5) through water pipes, the plurality of U-shaped tubes (601) are vertically arranged, and a plurality of channel tubes (603) are connected between the two straight tubes of each U-shaped tube (601), and a solenoid valve (602) is installed at the lower end of each channel tube (603) on the straight tube at the water inlet end of the two straight tubes, so that the U-shaped tube (601) forms a multi-stroke tube, and the left and right ends of the two straight tubes of each U-shaped tube (601) are connected to the heat extraction component (604).

7. The composite heat pipe heat pump snow melting system according to claim 6, characterized in that: Each of the heat extraction components (604) comprises a plurality of nuts (6041), a plurality of L-shaped tubes (6042), a plurality of heat conducting plates (6043), a plurality of heat transfer plates (6044) and a plurality of shock absorbing blocks (6046). Each straight tube of the U-shaped tube (601) is divided into multiple sections by the electromagnetic valve (602). Two external tubes (6011) are provided at both ends of each section of the tube. Two guide plates (3012) are provided at the upper and lower ends of the inner cavity of each section of the tube. Each guide plate (3012) They are all arranged at the corresponding external pipe 2 (6011), and each external pipe 2 (6011) is detachably connected to one end of an L-shaped pipe 2 (6042) through a nut 2 (6041). The two L-shaped pipes 2 (6042) corresponding to each section of the pipe are arranged opposite to each other, and the other end of each L-shaped pipe 2 (6042) is rotatably connected to the corresponding heat conduction plate (6043). The two L-shaped pipes 2 (6042) become the water inlet L-shaped pipe 2 and the water outlet L-shaped pipe 2 respectively along the water flow direction; each of the heat conduction plates (6043) is provided with an inner cavity, and each of the heat conduction plates (6043) is connected to a heat transfer plate 2 (6044), and each heat transfer plate 2 (6044) is arranged horizontally. A shock-absorbing block 2 (6046) is connected between every two adjacent heat transfer plates 2 (6044).

8. The composite heat pipe heat pump snow melting system according to claim 7, characterized in that: Each heat conducting plate (6043) is rotatably connected to the corresponding heat transfer plate 2 (6044) through an arc surface and an arc groove. Each heat conducting plate (6043) has grooves at the center of the arc surface at both ends. A spring 2 (6047) and a slider 2 (6045) are provided in each groove. The slider 2 (6045) is slidably arranged on the outside. The spring 2 (6047) connects the slider 2 (6045) and the groove. The heat transfer plate 2 (6044) has a slot at the corresponding position of the slider 2 (6045).

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