Energy-saving boiler based on valley electricity coupling

Abstract

The energy-saving boiler comprises a closed outer barrel, an inner barrel is fixed in the outer barrel, a plurality of sets of heat storage blocks are distributed in the inner barrel, connecting rods are arranged in front of and behind each set of heat storage blocks, heating elements are arranged in the connecting rods, a center shaft is rotationally arranged at the axis of the inner barrel, and the center shaft is provided with a heating element. A heat exchange piece is arranged at one end of the inner barrel, a heat exchange pipe is wound in the heat exchange piece, a water inlet and a water outlet of the heat exchange pipe penetrate out of the outer barrel, fan blades are arranged at the end, away from the heat exchange piece, of the inner barrel, a motor connected to the fan blades is arranged outside the outer barrel, and one end of the center shaft is rotationally connected to the fan blades. Compared with the prior art, optimization of energy storage, heat preservation and heat release efficiency is achieved, and remarkable economical efficiency, high efficiency and safety are comprehensively brought.

Description

Technical Field

[0001] This invention relates to the field of electric boiler technology, specifically an energy-saving boiler based on valley electricity coupling. Background Technology

[0002] With the transformation of the energy structure and the increasing peak-valley difference in power system load, "peak shaving and valley filling" has become a key means to ensure grid stability and improve energy efficiency. Valley coupling technology, which converts electrical energy into heat energy and stores it during off-peak hours when electricity prices are low, and releases it during peak hours when electricity prices are high, is of great significance for reducing energy costs for industrial, commercial, and residential users and promoting energy consumption.

[0003] Currently, energy-saving boilers based on off-peak electricity include water storage boilers. These boilers directly insert high-power electric heating elements into a large, highly insulated water tank. During off-peak electricity hours, the water in the tank is heated and stored at a constant temperature. When needed, the hot water is pumped out and exchanged with domestic or heating water through a plate heat exchanger. However, water has a limited specific heat capacity, requiring a huge water tank to store a large amount of heat. This places high demands on installation space, and the large surface area leads to significant heat loss. The high-temperature, high-pressure water tank also poses certain safety hazards, requiring high standards for pressure-bearing design and materials.

[0004] Solid-state thermal storage boilers use solid thermal storage materials such as magnesia bricks and ceramics as their core, whose specific heat capacity and temperature resistance are far superior to water. Heating elements are embedded in the thermal storage body, heating to several hundred degrees Celsius during off-peak electricity periods. During heat release, a fan blows cold air through the air ducts between the thermal storage bodies, and the heated air then exchanges heat with a heat exchanger. To reduce heat loss, the thermal storage bodies are usually designed with a tightly packed structure, but this severely hinders airflow during heat release, resulting in insufficient heat release power and an inability to quickly provide large quantities of hot water. Conversely, increasing the size of the air ducts to enhance heat release reduces the thermal storage density and increases heat loss during the insulation phase. Switching between thermal storage and heat release modes requires multiple independently controlled dampers, valves, and actuators, reducing system reliability. Furthermore, during insulation periods when no heat is needed, high-temperature heat may still slowly conduct outwards through fixed heat exchange channels, causing vaporization of the fluid inside the heat exchanger, generating high pressure, and posing a risk.

[0005] Therefore, it is necessary to provide an energy-saving boiler based on valley electricity coupling to solve the problems mentioned in the background art. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving boiler based on valley-electricity coupling, comprising a sealed outer cylinder, an inner cylinder fixed inside the outer cylinder, multiple sets of heat storage blocks distributed inside the inner cylinder, a connecting rod provided before and after each set of heat storage blocks, a heating element provided in the connecting rod, a central shaft rotatably provided at the axis of the inner cylinder, a heat exchange plate provided at one end of the inner cylinder, a heat exchange tube wound around the heat exchange plate, the inlet and outlet of the heat exchange tube extending to the outside of the outer cylinder, a fan blade provided at the end of the inner cylinder away from the heat exchange plate, a motor connected to the fan blade provided outside the outer cylinder, and one end of the central shaft rotatably connected to the fan blade.

[0007] Furthermore, each group of heat storage blocks includes multiple rings of arc-shaped heat storage blocks with progressively larger cross-sectional diameters from the inside out. When each ring of heat storage blocks is fitted together, it can form a complete ring. The front and rear end faces of each heat storage block are slidably disposed in the connecting rod, and one end of each heat storage block on the same diameter is connected to the same connecting rod.

[0008] Furthermore, each of the connecting rods is slidably provided with multiple sets of first connecting rods, each first connecting rod consisting of two cross-hinged connecting rods, and the center of each set of first connecting rods is hinged to the end face of a heat storage block, with the ends of adjacent first connecting rods hinged to each other.

[0009] Furthermore, in each group of thermal storage blocks, the thermal storage blocks closest to the center are fixedly connected to the connecting rod, and the end face of the thermal storage blocks furthest from the center is hinged with a second connecting rod, which consists of two connecting rods hinged end to end. A turntable is set between each group of thermal storage blocks, and the second connecting rods corresponding to the thermal storage blocks on both sides are hinged in the turntable at the end near the center.

[0010] Furthermore, the central shaft passes through and is fixed to each turntable, and the end of the central shaft away from the fan blades rotates through to the outside of the outer cylinder and is connected to a handle.

[0011] Furthermore, a fixed cylinder is rotatably sleeved at the central axis between the heat exchange plate and the group of heat storage blocks furthest from the fan blades. Multiple fixing strips are fixed between the fixed cylinder and the inner wall of the inner cylinder, and multiple fan-shaped partition plates are also rotatably arranged between the fixed cylinder and the inner wall of the inner cylinder.

[0012] Furthermore, multiple return air vents are provided on the inner cylinder sidewall between the separator and the group of heat storage blocks furthest from the fan blades.

[0013] Furthermore, the fixed cylinder has a cavity inside, and multiple bevel gears rotatably pass through the side wall of the fixed cylinder, with each bevel gear fixed to each partition plate; A bevel gear ring is rotatably disposed inside the fixed cylinder. The bevel gear ring meshes with each bevel gear, and the bevel gear ring is fixed to the central shaft.

[0014] Furthermore, a rotating cylinder is fixedly sleeved in the central shaft at the location of the return air vent, and a rotating ring is rotatably fitted to the inner wall of the inner cylinder at the return air vent, and multiple through holes are opened in the rotating ring; Multiple rotating bars are fixed between the rotating cylinder and the rotating ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the built-in fan blades force air to circulate in a closed loop within the inner cylinder during the heat storage stage, ensuring that heat is absorbed evenly and quickly by all heat storage blocks, avoiding local overheating or uneven heating, and maximizing the conversion efficiency of electrical energy to thermal energy. By adjusting the handle, the spacing between the heat storage blocks is increased when releasing heat, which greatly increases the contact surface area with the air, enhances the convective heat transfer effect, and allows the stored heat to be extracted quickly and fully. The airflow is precisely directed to the heat exchange fins, causing them to heat up rapidly. The cold water is directly and efficiently heated in the coil embedded with the high-temperature heat exchange fins, reducing intermediate steps and heat loss in traditional heat exchange.

[0016] In this invention, the spacing between the thermal storage blocks, the opening and closing of the partition plates, and the opening and closing of the return air vent can be completed simultaneously by rotating the central shaft with the handle. In the energy storage mode, the thermal storage blocks are closed, the partition plates are closed, and the return air vent is open, which can achieve the best heat preservation effect, block heat loss, and form an internal circulation. In the energy storage and heat preservation mode, the closed partition plates can effectively block the heat transfer to the heat exchange plate area, and avoid the residual water in the heat exchange tube from generating high-pressure steam due to long-term high-temperature baking, which greatly improves the safety of the system. In the heat release mode, the thermal storage blocks are expanded, the partition plates are opened, and the return air vent is closed. At this time, the heat release effect is the best, and hot air will pass to the heat exchange plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an energy-saving boiler based on valley electricity coupling; Figure 2 This is a schematic diagram of the internal structure of the inner cylinder of the present invention; Figure 3 This is a schematic diagram of the cross-section of the inner cylinder of the present invention; Figure 4 This is a schematic diagram of the structure of one end face of a row of thermal storage blocks in this invention; Figure 5 This is a schematic diagram of the cross-section of the separator in this invention; Figure 6 This is a structural schematic diagram of the cross-section of the fixed cylinder of the present invention; In the diagram: 1. Outer cylinder; 2. Inner cylinder; 3. Heat storage block; 4. Heat exchange plate; 5. Heat exchange tube; 51. Water inlet; 52. Water outlet; 6. Connecting rod; 61. First connecting rod; 62. Turntable; 63. Second connecting rod; 7. Central shaft; 71. Fan blade; 72. Motor; 73. Rotating handle; 8. Divider plate; 9. Fixed cylinder; 91. Bevel gear; 92. Bevel gear ring; 10. Fixed strip; 11. Rotating cylinder; 12. Rotating strip; 13. Rotating ring; 14. Return air inlet. Detailed Implementation

[0018] Please see Figures 1-6 In this embodiment of the invention, an energy-saving boiler based on valley electricity coupling includes a sealed outer cylinder 1, an inner cylinder 2 fixed inside the outer cylinder 1, multiple sets of heat storage blocks 3 distributed inside the inner cylinder 2, a connecting rod 6 provided before and after each set of heat storage blocks 3, a heating element provided in the connecting rod 6, a central shaft 7 rotatably provided at the axis of the inner cylinder 2, a heat exchange plate 4 provided at one end of the inner cylinder 2, a heat exchange tube 5 wound around the heat exchange plate 4, the inlet 51 and outlet 52 of the heat exchange tube 5 extending to the outside of the outer cylinder 1, a fan blade 71 provided at the end of the inner cylinder 2 away from the heat exchange plate 4, a motor 72 connected to the fan blade 71 provided outside the outer cylinder 1, and one end of the central shaft 7 rotatably connected to the fan blade 71.

[0019] During off-peak hours, the heating element is powered on and heats up, starting to heat the surrounding heat storage blocks 3. The fan blades 71 rotate, powerfully circulating hot air within the sealed space of the inner cylinder 2, ensuring that heat is evenly transferred to all heat storage blocks 3. After reaching the set time or temperature, the heating element stops working, and the heat is well stored in the heat storage blocks 3. During peak hours, when users need hot water or heating, the motor 72 is started, driving the fan blades 71 to rotate. The rotation of the fan blades 71 again drives the hot air circulation in the inner cylinder 2, continuously blowing the high-temperature heat stored in the heat storage blocks 3 onto the heat exchange plates 4, causing the temperature of the heat exchange plates 4 to rise rapidly. The water pump pumps cold water from the inlet 51 into the heat exchange tube 5. When the cold water flows through the heat exchange tube 5 embedded in the high-temperature heat exchange plates 4, it is efficiently heated by the high temperature outside the tube. The airflow generated on the front of the fan blade 71 passes through each set of heat storage blocks 3 and heat exchange plates 4 and then flows from the back of the heat exchange plates 4 to the gap between the outer cylinder 1 and the inner cylinder 2, and then flows back from the gap between the outer cylinder 1 and the inner cylinder 2 to the back of the fan blade 71, thereby achieving the effect of air circulation.

[0020] In this embodiment, each group of heat storage blocks 3 includes multiple rings of arc-shaped heat storage blocks 3 with progressively larger cross-sectional diameters from the inside out. When each ring of heat storage blocks 3 is in contact with each other, they can form a complete ring. The front and rear end faces of each heat storage block 3 are slidably disposed in the connecting rod 6, and one end of each heat storage block 3 on the same diameter is connected to the same connecting rod 6.

[0021] The multiple arc-shaped heat storage blocks 3 with their cross-sectional diameters increasing sequentially from the inside out can make full use of the cylindrical space. By changing the sliding position of each heat storage block 3 in the same connecting rod 6, the spacing of the heat storage blocks 3 can be changed. The smaller the spacing, the better the heat preservation effect; the larger the spacing, the better the heat release effect.

[0022] In this embodiment, each connecting rod 6 has multiple sets of first connecting rods 61 slidably arranged in it. Each first connecting rod 61 is composed of two cross-hinged connecting rods, and the center of each set of first connecting rods 61 is hinged to the end face of a heat storage block 3. The ends of adjacent first connecting rods 61 are hinged to each other.

[0023] In other words, under the action of the first connecting rod 61, the spacing between a row of heat storage blocks 3 of the same diameter is always kept uniform.

[0024] In this embodiment, in each group of heat storage blocks 3, the heat storage block 3 closest to the center is fixedly connected to the connecting rod 6, and the end face of the heat storage block 3 furthest from the center is hinged with a second connecting rod 63. The second connecting rod 63 is composed of two connecting rods that are hinged end to end. A turntable 62 is provided between each group of heat storage blocks 3, and the second connecting rod 63 corresponding to the heat storage blocks 3 on both sides is hinged in the turntable 62 at the end near the center. The central shaft 7 passes through and is fixed to each turntable 62. The end of the central shaft 7 away from the fan blade 71 rotates through to the outside of the outer cylinder 1 and is connected to a handle 73.

[0025] By rotating the handle 73, each turntable 62 can be rotated, and each second link 63 can be synchronously pushed to slide the heat storage block 3 furthest from the center along the connecting rod 6. Under the action of the first link 61, the remaining heat storage blocks 3 between the heat storage block 3 closest to the center and the heat storage block 3 furthest from the center will also slide, thereby synchronously changing the spacing between each ring of heat storage blocks 3. Furthermore, when the same ring of heat storage blocks 3 slides away from the center, since the diameter of the ring formed by the heat storage blocks 3 increases, while the arc length of the heat storage block 3 itself remains unchanged, the spacing between the same ring of heat storage blocks 3 will also increase. In other words, by rotating the handle 73, the spacing between each heat storage block 3 and the spacing between the two sides of the same heat storage block 3 can be adjusted simultaneously, thereby changing its heat preservation or heat dissipation effect according to the usage.

[0026] In this embodiment, a fixing cylinder 9 is rotatably sleeved at the central axis 7 between the heat exchange plate 4 and the group of heat storage blocks 3 furthest from the fan blade 71. Multiple fixing strips 10 are fixed between the fixing cylinder 9 and the inner wall of the inner cylinder 2. Multiple fan-shaped partition plates 8 are also rotatably arranged between the fixing cylinder 9 and the inner wall of the inner cylinder 2. Multiple return air vents 14 are provided on the side wall of the inner cylinder 2 between the partition plate 8 and the set of heat storage blocks 3 furthest from the fan blade 71.

[0027] When each of the partition plates 8 rotates to be parallel to the cross-section of the inner cylinder 2, they fit together and close the cross-section of the inner cylinder 2 at that point. The airflow generated by the fan blade 71 cannot pass through the partition plate 8 and flows back to the back of the fan blade 71 through the gap between the outer cylinder 1 and the inner cylinder 2 from the return air port 14. At this time, the airflow will not pass through the heat exchange plate 4. This is suitable for heating the heat storage block 3 when hot water is not needed, to prevent heat loss from the heat exchange plate 4 and the heat exchange tube 5, and to prevent the residual hot water in the heat exchange tube 5 from being too hot and generating high-pressure steam.

[0028] In this embodiment, the fixed cylinder 9 has a cavity inside, and multiple bevel gears 91 are rotatably passed through the side wall of the fixed cylinder 9, with each bevel gear 91 fixed to each partition plate 8; A bevel gear ring 92 is rotatably disposed inside the fixed cylinder 9. The bevel gear ring 92 meshes with each bevel gear 91, and the bevel gear ring 92 is fixed to the central shaft 7.

[0029] In other words, when the central shaft 7 is rotated by the handle 73, the partition plate 8 can be rotated, thereby opening or closing the cross section of the inner cylinder 2 at that point; Furthermore, when the central shaft 7 rotates to the point where the heat storage blocks 3 are in contact with each other, the partition plate 8 also rotates synchronously to close the cross section of the inner cylinder 2 at that point. At this time, the heating element heats the heat storage blocks 3. When the central shaft 7 rotates to the point where the heat storage blocks 3 are separated from each other, the partition plate 8 rotates synchronously to open the cross section of the inner cylinder 2 at that point. At this time, the heat storage blocks 3 release heat to heat the water flowing in the heat exchange tube 5.

[0030] In this embodiment, a rotating cylinder 11 is fixedly sleeved in the central shaft 7 at the location of the return air vent 14, and a rotating ring 13 is rotatably attached to the inner wall of the inner cylinder 2 at the return air vent 14. The rotating ring 13 has multiple through holes. Multiple rotating bars 12 are fixed between the rotating cylinder 11 and the rotating ring 13.

[0031] In other words, when the rotating ring 13 rotates to the point where the through hole coincides with the return air inlet 14, the return air inlet 14 opens, and when the rotating ring 13 rotates to the point where the through hole and the return air inlet 14 are misaligned, the return air inlet 14 closes. Furthermore, when the central shaft 7 rotates and the partition plate 8 closes the cross-section of the inner cylinder 2 at that location, the rotating ring 13 simultaneously rotates until the through hole coincides with the return air inlet 14. At this time, the airflow flows back from the return air inlet 14 to the back of the fan blade 71. When the central shaft 7 rotates and the partition plate 8 opens the cross-section of the inner cylinder 2 at that location, the rotating ring 13 simultaneously rotates until the through hole and the return air inlet 14 are misaligned. At this time, the airflow flows back from the heat exchange plate 4 to the back of the fan blade 71.

[0032] In practice, this includes: Heat storage mode: Rotate the handle 73 to the heat storage position. The central shaft 7 drives all the turntables 62 to rotate synchronously. The second connecting rod 63 pushes the outermost heat storage block to slide towards the center. The first connecting rod 61 links all the heat storage blocks to close evenly. It synchronously drives the partition plate 8 to rotate until it is parallel to the cross-section of the inner cylinder. At the same time, the through hole of the rotating ring 13 coincides with the return air port 14. The return air port 14 is opened. During the set off-peak electricity period, the heating element is powered on to heat the heat storage block 3. The motor 72 drives the fan blade 71 to rotate, forcing hot air to circulate from the return air port 14 in the sealed space of the inner cylinder 2 to ensure that the heat storage block is heated evenly. When the set temperature or time is reached, the heating element stops, the motor 72 stops, and the heat storage block retains heat. Heat release mode: Rotate the handle 73 to the heat release position, the central shaft 7 drives the turntable 62 to rotate in the opposite direction, so that all the heat storage blocks 3 slide radially along the connecting rod 6, gaps appear between the heat storage blocks 3 in the same ring, and the distance between the rings also expands synchronously, synchronously driving the partition plate 8 to rotate and open the air duct of the inner cylinder 2. At the same time, the rotating ring 13 closes the return air port 14, the motor 72 is started, and the fan blade 71 is driven to rotate. After the air is heated by the heat storage blocks 3, it is heated by the heat exchange plate 4 and flows back to the back of the fan blade 71. The high temperature heat stored in the heat storage blocks 3 is forced to blow onto the heat exchange plate 4, so that it heats up rapidly. Cold water is pumped into the heat exchange tube 5 from the inlet 51 and heated when it flows through the high temperature heat exchange plate. Hot water is output from the outlet 52. When rapid heating is required, the handle can be adjusted to 73 to the maximum spacing position for optimal heat release. When long-term low-temperature heating is required, the handle can be slightly adjusted back to 73 to reduce the spacing and balance the heat release rate and duration.

[0033] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An energy-saving boiler based on valley electricity coupling, comprising a sealed outer cylinder (1), characterized in that, The outer cylinder (1) is fixed with an inner cylinder (2). Multiple sets of heat storage blocks (3) are distributed inside the inner cylinder (2). Each set of heat storage blocks (3) is provided with a connecting rod (6) at the front and back. A heating element is provided in the connecting rod (6). A central shaft (7) is rotatably provided at the axis of the inner cylinder (2). A heat exchange plate (4) is provided at one end of the inner cylinder (2). A heat exchange tube (5) is wound around the heat exchange plate (4). The inlet (51) and outlet (52) of the heat exchange tube (5) extend to the outside of the outer cylinder (1). A fan blade (71) is provided at the end of the inner cylinder (2) away from the heat exchange plate (4). A motor (72) connected to the fan blade (71) is provided outside the outer cylinder (1). One end of the central shaft (7) is rotatably connected to the fan blade (71).

2. The energy-saving boiler based on valley electricity coupling according to claim 1, characterized in that, Each group of heat storage blocks (3) includes multiple rings of arc-shaped heat storage blocks (3) with increasing cross-sectional diameter from the inside to the outside. When the heat storage blocks (3) are in contact with each other, they can form a complete ring. The front and rear ends of each heat storage block (3) are slidably set in the connecting rod (6). One end of each heat storage block (3) on the same diameter is connected to the same connecting rod (6).

3. An energy-saving boiler based on valley electricity coupling according to claim 2, characterized in that, Each of the connecting rods (6) is slidably provided with multiple sets of first connecting rods (61). Each first connecting rod (61) consists of two cross-hinged connecting rods, and the center of each set of first connecting rods (61) is hinged to the end face of a heat storage block (3). The ends of adjacent first connecting rods (61) are hinged to each other.

4. An energy-saving boiler based on valley electricity coupling according to claim 2, characterized in that, In each group of heat storage blocks (3), the heat storage block (3) closest to the center is fixedly connected to the connecting rod (6), and the end face of the heat storage block (3) furthest from the center is hinged with a second connecting rod (63). The second connecting rod (63) consists of two connecting rods that are hinged end to end. A turntable (62) is provided between each group of heat storage blocks (3), and the second connecting rod (63) corresponding to the heat storage blocks (3) on both sides is hinged in the turntable (62) at the end near the center.

5. An energy-saving boiler based on valley electricity coupling according to claim 4, characterized in that, The central shaft (7) passes through and is fixed to each turntable (62). The end of the central shaft (7) away from the fan blade (71) rotates through to the outside of the outer cylinder (1) and is connected to a handle (73).

6. An energy-saving boiler based on valley electricity coupling according to claim 1, characterized in that, A fixed cylinder (9) is rotatably sleeved at the central axis (7) between the heat exchange plate (4) and the set of heat storage blocks (3) furthest from the fan blade (71). Multiple fixing strips (10) are fixed between the fixed cylinder (9) and the inner wall of the inner cylinder (2). Multiple fan-shaped partition plates (8) are also rotatably arranged between the fixed cylinder (9) and the inner wall of the inner cylinder (2).

7. An energy-saving boiler based on valley electricity coupling according to claim 6, characterized in that, Multiple return air vents (14) are opened on the side wall of the inner cylinder (2) between the partition plate (8) and the set of heat storage blocks (3) furthest from the fan blade (71).

8. An energy-saving boiler based on valley electricity coupling according to claim 6, characterized in that, The fixed cylinder (9) has a cavity inside, and multiple bevel gears (91) are rotatably passed through the side wall of the fixed cylinder (9), with each bevel gear (91) fixed to each partition plate (8); A bevel gear ring (92) is rotatably disposed inside the fixed cylinder (9), the bevel gear ring (92) meshes with each bevel gear (91), and the bevel gear ring (92) is fixed to the central shaft (7).

9. An energy-saving boiler based on valley electricity coupling according to claim 7, characterized in that, A rotating cylinder (11) is fixedly sleeved in the central shaft (7) at the location of the return air inlet (14). A rotating ring (13) is rotatably attached to the inner wall of the inner cylinder (2) at the return air inlet (14). Multiple through holes are opened in the rotating ring (13). Multiple rotating bars (12) are fixed between the rotating cylinder (11) and the rotating ring (13).

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