Energy accumulator and method for controlling energy accumulator

Abstract

The invention discloses an energy accumulator and an energy accumulator control method, and the energy accumulator comprises a box body which is internally provided with an energy storage material; the heat exchanger is located in the box body, the heat exchanger comprises a plurality of fins and heat exchange tubes, the fins are arranged at intervals in the first direction, and the heat exchange tubes are arranged on the fins in a penetrating mode; the first side plate is arranged at the end, in the second direction, of the heat exchanger and connected with the heat exchanger, and the first direction is perpendicular to the second direction; the heater is arranged on the side, away from the heat exchanger, of the first side plate and tightly attached to the first side plate. According to the energy accumulator, the first side plate and the heat exchanger form a heat bridge between the heater and the energy storage material, so that the heater can heat and charge the energy storage material, the energy charging efficiency of the energy storage material is improved, the energy charging efficiency of the energy accumulator is improved, and the energy accumulator can charge energy completely.

Description

Technical Field

[0001] The present invention relates to the technical field of accumulators, and particularly to an accumulator and a control method thereof. Background Art

[0002] Currently, phase change materials generally have a designed phase change temperature point. If heat needs to be filled into the phase change material, the temperature of the heat filling medium needs to be higher than the phase change temperature point. However, in low-temperature environmental conditions, there is heat dissipation when the heat pump water outlet or the phase change module has a long pipe network length, resulting in insufficient heat filling temperature and incomplete heat filling of the phase change module. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides an accumulator, which improves the charging efficiency of the accumulator and enables the accumulator to be fully charged.

[0004] The present invention also provides a control method for an accumulator, where the accumulator is the above-mentioned accumulator.

[0005] The present invention also provides another control method for an accumulator, where the accumulator is the above-mentioned accumulator.

[0006] The accumulator according to an embodiment of the present invention includes: a box body having a heat storage material therein; a heat exchanger located in the box body, the heat exchanger including a plurality of fins and heat exchange tubes, the plurality of fins being spaced apart along a first direction, and the heat exchange tubes passing through the plurality of fins; a first side plate provided at one end of the heat exchanger along a second direction and connected to the heat exchanger, the first direction and the second direction being perpendicular; and a heater provided on a side of the first side plate facing away from the heat exchanger and in close contact with the first side plate.

[0007] According to the accumulator of the embodiment of the present invention, by having a heat storage material in the box body, locating the heat exchanger in the box body, providing the first side plate at one end of the heat exchanger along the second direction and connecting it to the heat exchanger, and providing the heater on a side of the first side plate facing away from the heat exchanger and in close contact with the first side plate. Thus, the first side plate and the heat exchanger form a heat bridge between the heater and the heat storage material, enabling the heater to heat and charge the heat storage material, thereby improving the charging efficiency of the heat storage material, and further improving the charging efficiency of the accumulator and enabling the accumulator to be fully charged.

[0008] In some embodiments of the present invention, the accumulator further includes: a pressing spring plate provided on a side of the first side plate facing away from the heat exchanger and connected to the first side plate, and the heater is pressed between the first side plate and the pressing spring plate.

[0009] In some embodiments of the present invention, the compression spring includes: a connecting portion, the connecting portion is connected to the first side plate; a clamping portion, one end of the clamping portion is connected to the connecting portion, a cavity is defined between the clamping portion and the first side plate, and the heater is disposed in the cavity.

[0010] In some embodiments of the present invention, an opening is provided on the clamping portion, and the opening is located on the side of the heater facing away from the first side plate. An elastic arm is provided in the opening, and one end of the elastic arm is connected to the inner wall of the opening. The elastic arm has a protrusion protruding toward the first side plate, and the protrusion is against the heater.

[0011] In some embodiments of the present invention, there are a plurality of spaced-apart heaters, and there are two clamping portions, which are respectively disposed on opposite sides of the connecting portion and are used to clamp two adjacently disposed heaters.

[0012] In some embodiments of the present invention, a limiting plate is provided on a side of the first side plate facing away from the heat exchanger, and the lower end of the heater is supported on the limiting plate.

[0013] In some embodiments of the present invention, the heat exchange tube includes an energy-releasing heat exchange tube and an energy-storing heat exchange tube, the energy-releasing heat exchange tube and the energy-storing heat exchange tube are arranged in a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0014] In some embodiments of the present invention, in the second direction, the flow directions of the energy-releasing heat exchange tube and the energy-storing heat exchange tube are opposite.

[0015] In some embodiments of the present invention, in the second direction, the heater and the outlet end of the exothermic heat exchange tube are located at the same end.

[0016] In some embodiments of the present invention, the accumulator further includes: a second side plate, both ends of the heat exchanger along the first direction have the second side plate, the heat exchange tube is passed through the second side plate, and the second side plate is connected to the first side plate.

[0017] According to the control method of the accumulator of the embodiment of the present invention, when the accumulator is the above-mentioned accumulator, the control method of the accumulator includes:

[0018] Controlling the accumulator to enter a rapid heating mode;

[0019] Determine whether the temperature T of the energy storage material is greater than or equal to a first preset temperature T1;

[0020] If so, controlling the heater to turn on;

[0021] Determine that the temperature T of the energy storage material is greater than or equal to a second preset temperature T2, wherein the second preset temperature T2 is greater than the first preset temperature T1;

[0022] Controlling the heater to be turned off;

[0023] The energy accumulator is controlled to close the rapid heating mode.

[0024] According to the control method of the energy accumulator of the embodiment of the present invention, the energy accumulator is the above-mentioned energy accumulator, with energy storage material in the box, the heat exchanger is located in the box, the first side plate is arranged at one end of the heat exchanger along the second direction and connected to the heat exchanger, and the heater is arranged on the side of the first side plate away from the heat exchanger and is in close contact with the first side plate. Thus, the first side plate and the heat exchanger form a thermal bridge between the heater and the energy storage material, so that the heater can heat and charge the energy storage material, thereby improving the charging efficiency of the energy storage material, thereby improving the charging efficiency of the energy accumulator, and making the energy accumulator fully charged.

[0025] In some embodiments of the present invention, while determining whether the temperature T of the energy storage material is greater than or equal to the first preset temperature T1, the control method further includes:

[0026] Determining whether the temperature T of the energy storage material is less than the first preset temperature T1;

[0027] If so, controlling the heater and the heat pump to start simultaneously;

[0028] Determine that the temperature T of the energy storage material is greater than or equal to the first preset temperature T1;

[0029] The heat pump is turned off.

[0030] According to another embodiment of the present invention, a control method for an accumulator, when the accumulator is the above-mentioned accumulator, the heat exchange tube includes an energy-releasing heat exchange tube, and the heater is multiple, and the control method for the accumulator includes:

[0031] Determining that the temperature T of the energy storage material is less than a second preset temperature T2;

[0032] Determine whether the ambient temperature T0 is greater than or equal to a first preset ambient temperature T01;

[0033] If so, control the heat pump to start;

[0034] Determine that the temperature T of the energy storage material is less than or equal to T3-ΔT1 and the heat release water outlet temperature and the water outlet temperature T11 of the energy release heat exchange tube is greater than or equal to T12+ΔT2, wherein T3 is the phase change temperature point of the phase change material, and T12 is the water inlet temperature of the energy release heat exchange tube;

[0035] The heater described in the control section is turned on;

[0036] The accumulator enters a rapid heating mode.

[0037] According to another embodiment of the present invention, the accumulator control method is the above-mentioned accumulator, with energy storage material in the box, the heat exchanger is located in the box, the first side plate is arranged at one end of the heat exchanger along the second direction and connected to the heat exchanger, and the heater is arranged on the side of the first side plate away from the heat exchanger and is in close contact with the first side plate. Thus, the first side plate and the heat exchanger form a thermal bridge between the heater and the energy storage material, so that the heater can heat and charge the energy storage material, thereby improving the charging efficiency of the energy storage material, thereby improving the charging efficiency of the accumulator, and making the accumulator fully charged.

[0038] In some embodiments of the present invention, while determining whether the ambient temperature T0 is greater than or equal to the first preset ambient temperature T01, the control method further includes:

[0039] Determine whether the ambient temperature T0 is less than the first preset ambient temperature T01 and greater than or equal to the second preset ambient temperature T02, T02<T01,

[0040] If so, the heat pump and some of the heaters are controlled to turn on.

[0041] In some embodiments of the present invention, the energy storage device control method further includes: determining that the temperature T of the energy storage material is less than a second preset temperature T2 and the ambient temperature T0 is less than a second preset ambient temperature T02;

[0042] Controlling all of the heaters to turn on;

[0043] The accumulator enters the rapid heating mode.

[0044] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0046] Figure 1 is a partial exploded view of an accumulator according to an embodiment of the present invention;

[0047] Figure 2 is a partial top view of an accumulator according to an embodiment of the present invention;

[0048] Figure 3 is a three-dimensional diagram of a compression spring of an accumulator according to an embodiment of the present invention;

[0049] Figure 4 is Figure 1 an enlarged view of location A in

[0050] Figure 5 a schematic diagram of the connection circuit of the accumulator in the hot water system according to an embodiment of the present invention;

[0051] Figure 6 a schematic flow diagram of the control method of the accumulator according to an embodiment of the present invention;

[0052] Figure 7 a schematic flow diagram of the control method of the accumulator according to another embodiment of the present invention.

[0053] Reference numerals:

[0054] 100, accumulator;

[0055] 1, heat exchanger; 12, heat exchange tube; 121, energy-releasing heat exchange tube; 122, energy-storing heat exchange tube; 1231, energy-releasing outlet branch pipe; 1232, energy-releasing inlet branch pipe; 1233, energy-storing inlet branch pipe; 1234, energy-storing outlet branch pipe; 1241, energy-releasing main outlet; 1242, energy-releasing main inlet; 1243, energy-storing main inlet; 1244, energy-storing main outlet;

[0056] 2, first side plate; 21, limiting plate; 22, flanging;

[0057] 3, heater;

[0058] 4, pressing spring piece; 41, connecting part; 42, pressing part; 421, opening; 422, elastic arm; 423, protruding part; 424, cavity;

[0059] 5, second side plate;

[0060] 200, heat pump;

[0061] 300, water-using equipment. Detailed Description of the Embodiment

[0062] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0063] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0064] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0065] The accumulator 100 according to an embodiment of the present invention will be described below with reference to the drawings.

[0066] As Figure 1 and Figure 2 shown, the accumulator 100 according to an embodiment of the present invention includes a box body, a heat exchanger 1, a first side plate 2 and a heater 3.

[0067] Specifically, referring to Figure 1 and Figure 2 , the box body (not shown) has energy storage materials; the heat exchanger 1 is located inside the box body. The heat exchanger 1 includes a plurality of fins (not shown) and heat exchange tubes 12. The plurality of fins are arranged at intervals along a first direction (such as Figure 1 the a direction shown), and the heat exchange tubes 12 are penetrated through the plurality of fins.

[0068] It can be understood that the heat exchanger 1 is immersed in the energy storage materials, and heat exchange is performed between the energy storage materials and the liquid in the heat exchange tubes 12. When the accumulator 100 is charged, heat exchange between the energy storage materials and the liquid in the heat exchange tubes 12 realizes the temperature rise of the energy storage materials. When the accumulator 100 releases heat, heat exchange between the energy storage materials and the liquid in the heat exchange tubes 12 realizes the temperature rise of the liquid in the heat exchange tubes 12.

[0069] Furthermore, as Figure 1 shown, the first side plate 2 is provided on the heat exchanger 1 along a second direction (such asFigure 1 One end in the b direction shown and is connected to the heat exchanger 1, and the first direction and the second direction are perpendicular; the heater 3 is provided on the side of the first side plate 2 facing away from the heat exchanger 1 and is in close contact with the first side plate 2.

[0070] The heater 3 is in close contact with the first side plate 2, so that the heater 3 can transfer heat to the first side plate 2 better. At the same time, the first side plate 2 is connected to the heat exchanger 1, so that the heater 3 can transfer heat to the heat exchanger 1 through the first side plate 2. Since the heat exchanger 1 is immersed in the energy storage material, the heat from the heater 3 can be transferred to the energy storage material. Thus, a heat bridge between the heater 3 and the energy storage material is formed through the first side plate 2 and the heat exchanger 1, enabling the heater 3 to heat and charge the energy storage material, thereby improving the charging efficiency of the energy storage material, improving the charging efficiency of the accumulator 100, and making the accumulator 100 fully charged.

[0071] In addition, since the first side plate 2 and the heater 3 are made of metal materials such as copper with high thermal conductivity, the heating and charging efficiency of the heater 3 for the energy storage material is further improved, the charging efficiency of the accumulator 100 is further improved, and the accumulator 100 is fully charged. At the same time, since the heat exchanger 1 is immersed in the energy storage material and the contact area between the heat exchanger 1 and the energy storage material is large, the heating and charging efficiency of the heater 3 for the energy storage material is further improved, the charging efficiency of the accumulator 100 is further improved, and the accumulator 100 is fully charged.

[0072] For the accumulator 100 according to the embodiment of the present invention, there is an energy storage material in the box, the heat exchanger 1 is located in the box, the first side plate 2 is provided at one end of the heat exchanger 1 along the second direction and is connected to the heat exchanger 1, and the heater 3 is provided on the side of the first side plate 2 facing away from the heat exchanger 1 and is in close contact with the first side plate 2. Thus, a heat bridge between the heater 3 and the energy storage material is formed through the first side plate 2 and the heat exchanger 1, enabling the heater 3 to heat and charge the energy storage material, thereby improving the charging efficiency of the energy storage material, improving the charging efficiency of the accumulator 100, and making the accumulator 100 fully charged.

[0073] In some embodiments of the present invention, as Figure 1 and Figure 3 shown, the accumulator 100 further includes a pressing spring piece 4. The pressing spring piece 4 is provided on the side of the first side plate 2 facing away from the heat exchanger 1 and is connected to the first side plate 2, and the heater 3 is pressed between the first side plate 2 and the pressing spring piece 4.

[0074] It can be understood that the heater 3 is pressed between the first side plate 2 and the pressing spring piece 4, thereby improving the degree of close contact between the heater 3 and the first side plate 2, thereby improving the heat transfer efficiency between the heater 3 and the first side plate 2, thereby further improving the heating efficiency of the heater 3 for the energy storage material, thereby improving the charging efficiency of the accumulator 100 and enabling the accumulator 100 to be fully charged.

[0075] Meanwhile, the heater 3 is fixed to the first side plate 2 by the frictional force between the heater 3, the first side plate 2 and the pressing spring piece 4, and the detachable connection between the heater 3 and the first side plate 2 can be realized, which is convenient for the disassembly, installation and maintenance of the heater 3.

[0076] In some embodiments of the present invention, as Figure 1 and Figure 3 shown, the pressing spring piece 4 includes a connecting portion 41 and a pressing portion 42. The connecting portion 41 is connected to the first side plate 2; one end of the pressing portion 42 is connected to the connecting portion 41, and a cavity 424 is defined between the pressing portion 42 and the first side plate 2, and the heater 3 is disposed through the cavity 424.

[0077] It can be understood that the connecting portion 41 is connected to the first side plate 2, so that the pressing spring piece 4 can be fixed to the first side plate 2, thereby improving the pressing degree of the pressing spring piece 4 and the first side plate 2 on the heater 3. One end of the pressing portion 42 is connected to the connecting portion 41, and the other end bends and extends toward the first side plate 2, so that a cavity 424 is defined between the pressing portion 42 and the first side plate 2, and the heater 3 is disposed through the cavity 424, thereby restricting the movement of the heater 3 in its radial direction and improving the limiting and fixing effect on the heater 3.

[0078] For example, in the examples shown in Figure 1 and Figure 3 , the connecting portion 41 and the first side plate 2 are connected by fasteners such as screws, but the present invention is not limited thereto, and the connecting portion 41 and the first side plate 2 can also be connected by welding, riveting or other means.

[0079] In some embodiments of the present invention, as Figure 1 and Figure 3 shown, an opening 421 is provided on the pressing portion 42. The opening 421 is located on the side of the heater 3 facing away from the first side plate 2. An elastic arm 422 is provided in the opening 421. One end of the elastic arm 422 is connected to the inner wall of the opening 421. The elastic arm 422 has a protruding portion 423 protruding toward the first side plate 2, and the protruding portion 423 abuts against the heater 3.

[0080] It can be understood that one end of the elastic arm 422 is connected to the inner wall of the opening 421, and the other end can move towards or away from the first side plate 2, so that the protruding portion 423 can move towards or away from the first side plate 2, so that the protruding portion 423 abuts against or is spaced apart from the heater 3, which facilitates the installation and disassembly of the heater 3. In addition, the opening 421 can facilitate the user to operate the end of the elastic arm 422 away from the connection with the inner wall of the opening 421, thus facilitating the installation and disassembly of the heater 3.

[0081] When the heater 3 needs to be installed, the user operates the elastic arm 422 to move the protruding portion 423 in a direction away from the first side plate 2, so that the heater 3 can be smoothly passed through the cavity 424, and then the elastic arm 422 is released. The protruding portion 423 moves in a direction close to the first side plate 2, so that the protruding portion 423 abuts against the heater 3 to complete the installation of the heater 3.

[0082] When the heater 3 needs to be disassembled, the user operates the elastic arm 422 to move the protruding portion 423 in a direction away from the first side plate 2, so that the protruding portion 423 is spaced apart from the heater 3, so that the heater 3 can smoothly leave the cavity 424 to complete the disassembly of the heater 3.

[0083] In Figure 3 In the illustrated example, the upper end of the elastic arm 422 is connected to the inner wall of the opening 421, but the present invention is not limited thereto, and it may also be that the lower end of the elastic arm 422 is connected to the inner wall of the opening 421.

[0084] In some embodiments of the present invention, as Figure 1 shown, there are a plurality of spaced-apart heaters 3, and the pressing portions 42 are two and are respectively arranged on opposite sides of the connecting portion 41 for clamping two adjacent heaters 3 respectively.

[0085] It can be understood that there are a plurality of spaced-apart heaters 3, and the plurality of heaters 3 can jointly heat the energy storage material, thereby further improving the heating efficiency of the heaters 3 for the energy storage material, thereby improving the charging efficiency of the accumulator 100 and making the accumulator 100 fully charged. The pressing portions 42 are also two spaced apart along the arrangement direction of the heaters 3, and the connecting portion 41 is located between the two pressing portions 42, so that each pressing elastic sheet 4 can press two heaters 3 at the same time, thereby improving the installation efficiency.

[0086] In some embodiments of the present invention, as Figure 1As shown, there are multiple pressing elastic pieces 4 spaced apart along the length direction of the heater 3. Thus, the degree to which the heater 3 is pressed is increased, thereby improving the connection reliability between the heater 3, the pressing elastic pieces 4, and the first side plate 2. Also, the close contact degree between the heater 3 and the first side plate 2 is further improved, thereby enhancing the heat transfer efficiency between the heater 3 and the first side plate 2, further improving the heating efficiency of the heater 3 for the energy storage material, and thus improving the charging efficiency of the accumulator 100, enabling the accumulator 100 to be fully charged.

[0087] For example, in Figure 1 the illustrated example, there are 3 pressing elastic pieces 4 spaced apart along the length direction of the heater 3. However, the present invention is not limited thereto. The pressing elastic pieces 4 can be more or fewer along the length direction of the heater 3, such as 2, 4, 5, or 6, etc.

[0088] In some embodiments of the present invention, as Figure 1 and Figure 4 shown, a limiting plate 21 is provided on the side of the first side plate 2 facing away from the heat exchanger 1, and the lower end of the heater 3 is supported on the limiting plate 21. Thus, the downward dropping of the heater 3 can be restricted, thereby improving the installation stability of the heater 3. Additionally, the limiting plate 21 is spaced apart from the box body, thus preventing the limiting plate 21 from contacting the box body, avoiding the limiting plate 21 from becoming a heat bridge between the heater 3 and the box body, and improving safety.

[0089] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the heat exchange tubes 12 include an energy - releasing heat exchange tube 121 and an energy - storing heat exchange tube 122. The energy - releasing heat exchange tube 121 and the energy - storing heat exchange tube 122 are arranged in the third direction (such as the c direction shown in Figure 1 ). The first direction, the second direction, and the third direction are perpendicular to each other pairwise. It can be understood that the energy storage material exchanges heat with the liquid in the energy - storing heat exchange tube 122 to increase the temperature, thereby realizing the energy storage of the energy storage material. The liquid in the energy - releasing heat exchange tube 121 exchanges heat with the energy storage material to increase the temperature, thereby realizing the energy release of the energy storage material, and thus realizing the energy release and energy storage of the accumulator 100.

[0090] Furthermore, as Figure 1 shown, the energy - releasing heat exchange tube 121 and the energy - storing heat exchange tube 122 are adjacent to each other in the third direction, so that the energy storage material after exchanging heat with the liquid in the energy - storing heat exchange tube 122 can directly exchange heat with the liquid in the energy - releasing heat exchange tube 121, thereby improving the heat exchange efficiency of the heat exchanger 1.

[0091] Furthermore, as Figure 5As shown, the exothermic heat exchange tube 121 is connected to the water-using device 300, so that the water-using device 300 can discharge hot water for users. The energy storage heat exchange tube 122 is connected to the heat pump 200, so that the heat pump 200 can heat the liquid in the energy storage heat exchange tube 122 to realize the energy storage of the energy storage material.

[0092] In some embodiments of the present invention, in the second direction, the flow directions of the exothermic heat exchange tube 121 and the energy storage heat exchange tube 122 are opposite. It can be understood that during exothermic, as heat exchange progresses, the temperature of the liquid in the exothermic heat exchange tube 121 gradually increases along the flow path, and the temperature of the energy storage material around the exothermic heat exchange tube 121 gradually decreases along the way. During energy storage, the temperature of the liquid in the energy storage heat exchange tube 122 gradually decreases along the flow path, and the temperature of the energy storage material around the energy storage heat exchange tube 122 gradually increases along the way. Thus, the temperature of the energy storage material around the inlet end of the energy storage heat exchange tube 122 is the highest, the temperature of the energy storage material around the outlet end of the energy storage heat exchange tube 122 is the lowest, the temperature of the energy storage material around the inlet end of the exothermic heat exchange tube 121 is the lowest, and the temperature of the energy storage material around the outlet end of the exothermic heat exchange tube 121 is the highest.

[0093] In the second direction, the flow directions of the exothermic heat exchange tube 121 and the energy storage heat exchange tube 122 are opposite, so that the inlet end of the exothermic heat exchange tube 121 is adjacent to the outlet end of the energy storage heat exchange tube 122, and the outlet end of the exothermic heat exchange tube 121 is adjacent to the inlet end of the energy storage heat exchange tube 122, so that the temperatures of the energy storage materials around the exothermic heat exchange tube 121 and the energy storage heat exchange tube 122 are adapted, thereby improving the heat exchange efficiency of the heat exchanger 1 and thus improving the working efficiency of the accumulator 100.

[0094] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the heater 3 and the exothermic heat exchange tube 121 are oppositely arranged in the second direction. It can be understood that the heater 3 and the exothermic heat exchange tube 121 are oppositely arranged in the second direction, so that the heater 3 can be arranged close to the exothermic heat exchange tube 121, so that when the heater 3 heats the energy storage material, it can also heat the liquid in the exothermic heat exchange tube 121, thereby improving the exothermic efficiency of the accumulator 100, so that the hot water output efficiency of the accumulator 100 is improved, and the effect of rapid heating can be achieved, enhancing the user experience.

[0095] In some embodiments of the present invention, as Figure 1 and Figure 2As shown, in the second direction, the heater 3 and the outlet end of the energy-releasing heat exchange tube 121 are located at the same end. Thus, the heater 3 can be further arranged closer to the energy-releasing heat exchange tube 121, so that when the heater 3 heats the energy storage material, it can also heat the liquid in the energy-releasing heat exchange tube 121, thereby improving the energy-releasing efficiency of the energy accumulator 100, and improving the hot water output efficiency of the energy accumulator 100, achieving the effect of instant heating and enhancing the user experience.

[0096] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, there are multiple energy-releasing heat exchange tubes 121 spaced apart in the third direction, and there are multiple heaters 3 corresponding one-to-one to the multiple energy-releasing heat exchange tubes 121. It can be understood that the multiple energy-releasing heat exchange tubes 121 and the multiple heaters 3 can improve the energy-releasing efficiency of the energy accumulator 100, thereby improving the hot water output efficiency and enhancing the user experience. At the same time, the multiple heaters 3 can also improve the energy storage efficiency of the energy storage material, further improving the working efficiency of the energy accumulator 100.

[0097] For example, in the Figure 1 shown example, there are two energy-releasing heat exchange tubes 121 spaced apart in the third direction, and there are also two heaters 3. However, the present invention is not limited thereto, and there can be more energy-releasing heat exchange tubes 121 and heaters 3, such as 3, 4, 5, or 6, etc.

[0098] Further, along the third direction, there is one energy storage heat exchange tube 122 between every two energy-releasing heat exchange tubes 121, and the number is half of the number of energy-releasing heat exchange tubes 121. Thus, the number of energy-releasing heat exchange tubes 121 is more than that of energy storage heat exchange tubes 122, thereby improving the heat exchange efficiency of the energy-releasing heat exchange tubes 121, improving the energy-releasing efficiency of the energy accumulator 100, improving the hot water output efficiency, and enhancing the user experience.

[0099] In some embodiments of the present invention, the heater 3 includes multiple sub-heaters 3. It can be understood that the multiple sub-heaters 3 can be controlled separately or centrally, so as to facilitate heating the energy storage material to different degrees. For example, when the temperature of the energy storage material is relatively high, some of the multiple sub-heaters 3 are turned on to heat the energy storage material. When the temperature of the energy storage material is relatively low, all of the multiple sub-heaters 3 are turned on to heat the energy storage material. Thus, heating the energy storage material to different degrees is beneficial to balancing the energy saving and efficiency of the energy accumulator 100.

[0100] In some embodiments of the present invention, as Figure 1As shown, the heater 3 extends in the first direction. It can be understood that since the first side plate 2 extends in the first direction and the heater 3 extends in the first direction, the extension direction of the heater 3 is the same as that of the first side plate 2, thereby increasing the coverage area of the heater 3 on the first side plate 2 and the coverage span in the first direction. Further, the heat transfer efficiency between the heater 3 and the first side plate 2 is improved, and then the heating efficiency of the heater 3 for the energy storage material is further enhanced, thus improving the charging efficiency of the accumulator 100 and enabling the accumulator 100 to be fully charged.

[0101] In some embodiments of the present invention, the heat exchange tube 12 is an energy-releasing heat exchange tube 121. It can be understood that when all the heat exchange tubes 12 are energy-releasing heat exchange tubes 121, the energy storage material only exchanges heat with the liquid in the energy-releasing heat exchange tube 121, thereby improving the heat exchange efficiency between the energy storage material and the liquid in the energy-releasing heat exchange tube 121. Of course, the liquid in the heat exchange tube 12 can also be directly heated by the heater 3, thus improving the energy-releasing efficiency of the accumulator 100 and the hot water output efficiency of the accumulator 100.

[0102] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the accumulator 100 further includes a second side plate 5. Both ends of the heat exchanger 1 in the first direction are provided with a second side plate 5. The heat exchange tube 12 is passed through the second side plate 5, and the second side plate 5 is connected to the first side plate 2.

[0103] It can be understood that the second side plate 5 is used to fix the heat exchange tube 12. The heat exchange tube 12 is passed through the second side plate 5, and the second side plate 5 is connected to the first side plate 2. At the same time, the heat exchange tube 12 is passed through the fins. Thus, when the heater 3 is working, heat can be transferred to the energy storage material through the first side plate 2, the second side plate 5, the heat exchange tube 12 and the fins, so that the first side plate 2, the second side plate 5, the heat exchange tube 12 and the fins form a heat bridge between the heater 3 and the energy storage material, thereby improving the heating efficiency of the energy storage material and the energy storage efficiency of the accumulator 100, enabling the accumulator 100 to be fully charged.

[0104] In some embodiments of the present invention, as Figure 1 and Figure 2As shown, at least one end of each of the two ends of the first side plate 2 along the length direction of the first direction has a flanging 22 bent toward the heat exchanger 1, and the free end of the flanging 22 has a notch for avoiding the heat exchange tube 12. It can be understood that the flanging 22 is bent toward the heat exchanger 1, so that heat transfer between the first side plate 2 and the heat exchanger 1 can be better, thereby improving the heating efficiency of the energy storage material, improving the energy storage efficiency of the energy accumulator 100, and enabling the energy accumulator 100 to store energy sufficiently. In addition, the free end of the flanging 22 has a notch for avoiding the heat exchange tube 12, so as to avoid installation interference between the heat exchange tube 12 and the flanging 22.

[0105] Further, as Figure 1 and Figure 2 shown, the heat exchange tube 12 includes an energy-releasing heat exchange tube 121 and an energy-storing heat exchange tube 122. The heat exchange tube 12 has an energy-releasing outlet branch pipe 1231, an energy-releasing total outlet 1241, an energy-releasing inlet branch pipe 1232, an energy-releasing total inlet 1242, an energy-storing inlet branch pipe 1233, an energy-storing outlet branch pipe 1234, an energy-storing total inlet 1243, and an energy-storing total outlet 1244. The inlet end of each energy-releasing heat exchange tube 121 is connected to the energy-releasing total inlet 1242 through an energy-releasing inlet branch pipe 1232, and a plurality of energy-releasing inlet branch pipes 1232 are connected in parallel with each other. The outlet end of each energy-releasing heat exchange tube 121 is connected to the energy-releasing total outlet 1241 through an energy-releasing outlet branch pipe 1231, and a plurality of energy-releasing outlet branch pipes 1231 are connected in parallel with each other. The inlet end of each energy-storing heat exchange tube 122 is connected to the energy-storing total inlet 1243 through an energy-storing inlet branch pipe 1233, and a plurality of energy-storing inlet branch pipes 1233 are connected in parallel with each other. The outlet end of each energy-storing heat exchange tube 122 is connected to the energy-storing total outlet 1244 through an energy-storing outlet branch pipe 1234, and a plurality of energy-storing outlet branch pipes 1234 are connected in parallel with each other. The energy-releasing total outlet 1241, the energy-releasing total inlet 1242, the energy-storing total inlet 1243, and the energy-storing total outlet 1244 are located at the same end along the second direction. Thus, the inlet and outlet of the energy accumulator 100 are located at the same end, facilitating the installation and connection of pipelines.

[0106] Meanwhile, the free end of the flanging 22 has notches for avoiding the energy-releasing outlet branch pipe 1231 and the energy-storing inlet branch pipe 1233. Thus, in the quick heating mode, the heater 3 can directly heat the liquid in the energy-releasing outlet branch pipe 1231, improving the hot water output efficiency of the energy accumulator 100 and meeting the needs of users.

[0107] In some embodiments of the present invention, as Figure 1As shown, the heater 3 is a sheet-shaped or tubular heater 3. It can be understood that the heater 3 being a sheet-shaped or tubular heater 3 can increase the contact area between the heater 3 and the first side plate 2, thereby improving the heat transfer efficiency between the heater 3 and the first side plate 2, further improving the heating efficiency of the heater 3 for the energy storage material, and thus improving the charging efficiency of the accumulator 100, enabling the accumulator 100 to be fully charged.

[0108] Furthermore, the heater 3 is a ceramic PTC heater 3. The ceramic PTC heater 3 can prevent chemical corrosion of the heater 3 in the energy storage material, thereby increasing the service life and safety of the heater 3.

[0109] In some embodiments of the present invention, as Figure 1 shown, there are multiple heaters 3 arranged at intervals along the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other in pairs. Thus, the heating efficiency of the energy storage material is further improved, thereby improving the charging efficiency of the accumulator 100 and enabling the accumulator 100 to be fully charged.

[0110] For example, in Figure 1 the example shown, there are two heaters 3 arranged at intervals along the third direction, but the present invention is not limited thereto. There can be more heaters 3, such as 3, 4, 5, or 6, etc.

[0111] Next, a control method for the accumulator 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0112] As Figure 6 shown, for the control method of the accumulator 100 according to an embodiment of the present invention, when the accumulator 100 is the above-mentioned accumulator 100, the control method of the accumulator 100 includes:

[0113] Controlling the accumulator 100 to enter the rapid heating mode;

[0114] Judging whether the temperature T of the energy storage material is greater than or equal to the first preset temperature T1;

[0115] If so, controlling the heater 3 to turn on;

[0116] Determining that the temperature T of the energy storage material is greater than or equal to the second preset temperature T2, where the second preset temperature T2 is greater than the first preset temperature T1;

[0117] Controlling the heater 3 to turn off;

[0118] Controlling the accumulator 100 to turn off the rapid heating mode.

[0119] It can be understood that the second preset temperature T2 is the temperature set by the user, that is, the water outlet temperature. When the temperature T of the energy storage material is greater than the first preset temperature T1 and less than the second preset temperature T2, the energy storage material cannot satisfy the liquid to reach the second preset temperature T2 even after completely releasing the energy. In this case, it is necessary to control the heater 3 to turn on, so that the energy storage material can heat up quickly, so that the temperature of the energy storage material can be higher than the second preset temperature T2, thereby satisfying the water outlet temperature set by the user and achieving rapid heating.

[0120] At the same time, when the temperature T of the energy storage material is greater than the first preset temperature T1 and greater than the second preset temperature T2, the energy storage material can fully release the energy to make the liquid reach the second preset temperature T2, and no further heating is required. The heater 3 is controlled to be turned off, so that the purpose of energy saving of the energy accumulator 100 can be achieved.

[0121] For example, in the present invention, the first preset temperature T1 is 53° C., but the present invention is not limited thereto, and the first preset temperature T1 may be other values, such as 54° C., 40° C., 58° C. or 30° C., etc.

[0122] According to the control method of the accumulator 100 of the embodiment of the present invention, the accumulator 100 is the above-mentioned accumulator 100, with energy storage material in the box, the heat exchanger 1 is located in the box, the first side plate 2 is arranged at one end of the heat exchanger 1 along the second direction and connected to the heat exchanger 1, and the heater 3 is arranged on the side of the first side plate 2 away from the heat exchanger 1 and is in close contact with the first side plate 2. Thus, the first side plate 2 and the heat exchanger 1 form a thermal bridge between the heater 3 and the energy storage material, so that the heater 3 can heat and charge the energy storage material, thereby improving the charging efficiency of the energy storage material, thereby improving the charging efficiency of the accumulator 100, and making the accumulator 100 fully charged.

[0123] In some embodiments of the present invention, Figure 6 As shown, while judging whether the temperature T of the energy storage material is greater than or equal to the first preset temperature T1, the control method also includes:

[0124] Determine whether the temperature T of the energy storage material is less than a first preset temperature T1;

[0125] If yes, control the heater 3 and the heat pump 200 to start at the same time;

[0126] Determine that the temperature T of the energy storage material is greater than or equal to a first preset temperature T1;

[0127] The heat pump 200 is turned off.

[0128] It can be understood that when the temperature T of the energy storage material is less than the first preset temperature T1, the energy storage in the energy storage material is insufficient. At this time, controlling the heater 3 and the heat pump 200 to be turned on simultaneously can rapidly increase the temperature of the energy storage material, improve the energy charging efficiency of the energy storage material, and thus improve the energy charging efficiency of the accumulator 100. When the temperature T of the energy storage material is greater than or equal to the first preset temperature T1 and less than the second preset temperature T2, the heat pump 200 is turned off, and only the heater 3 is used to increase the temperature of the energy storage material. Thus, the purpose of energy saving can be achieved.

[0129] In addition, the following process is carried out to implement the shutdown of the quick heating mode:

[0130] Determine that the temperature T of the energy storage material is greater than or equal to the second preset temperature T2, where the second preset temperature T2 is greater than the first preset temperature T1;

[0131] Control the heater 3 to turn off;

[0132] Control the accumulator 100 to turn off the quick heating mode.

[0133] In some embodiments of the present invention, as Figure 6 shown, controlling the accumulator 100 to enter the quick heating mode includes manually controlling the accumulator 100 to enter the quick heating mode. Thus, the user can make the accumulator 100 enter the quick heating mode according to their own needs, further improving the user experience.

[0134] The control method of the accumulator 100 according to another embodiment of the present invention will be described below with reference to the accompanying drawings.

[0135] As Figure 7 shown, for the control method of the accumulator 100 according to another embodiment of the present invention, when the accumulator 100 is the above-mentioned accumulator 100, the heat exchange tube 12 includes an energy-releasing heat exchange tube 121, and there are multiple heaters 3. The control method of the accumulator 100 includes:

[0136] Determine that the temperature T of the energy storage material is less than the second preset temperature T2;

[0137] Judge whether the ambient temperature T0 is greater than or equal to the first preset ambient temperature T01;

[0138] If so, control the heat pump 200 to turn on;

[0139] Determine that the temperature T of the energy storage material is less than or equal to T3 - △T1 and the outlet water temperature T11 of the energy-releasing heat exchange tube 121 is greater than or equal to T12 + △T2, where T3 is the phase change temperature point of the phase change material and T12 is the inlet water temperature of the energy-releasing heat exchange tube 121;

[0140] Control some of the heaters 3 to turn on;

[0141] The accumulator 100 enters the rapid heating mode.

[0142] It can be understood that the second preset temperature T2 is the outlet water temperature set by the user. When the temperature T of the energy storage material is greater than or equal to the second preset temperature T2, the energy storage material releases all its energy, enabling the liquid to reach the second preset temperature T2. Thus, it can enter the rapid heating mode at any time to meet the user's hot water demand, without the need to heat and charge the energy storage material. The accumulator 100 can remain in standby state, thereby achieving the purpose of energy conservation.

[0143] When the temperature T of the energy storage material is less than the second preset temperature T2, the energy storage material cannot release all its energy to make the liquid temperature reach the second preset temperature T2, and thus the energy storage material needs to be charged.

[0144] When the temperature T of the energy storage material is less than or equal to T3 - △T1, the energy stored in the energy storage material is insufficient. When the temperature T of the energy storage material is greater than T3 - △T1, the energy stored in the energy storage material is still sufficient. When the outlet water temperature T11 of the energy release heat exchange tube 121 is greater than or equal to T12 + △T2, it can be determined that the user is using hot water. When the outlet water temperature T11 of the energy release heat exchange tube 121 is less than T12 + △T2, it can be determined that the user is not using hot water.

[0145] Therefore, when the ambient temperature T0 is greater than or equal to the first preset ambient temperature T01, and when the temperature T of the energy storage material is greater than T3 - △T1 or the outlet water temperature T11 of the energy release heat exchange tube 121 is less than T12 + △T2, the ambient temperature T0 is relatively high, the heat loss of the accumulator 100 exposed to the environment is small, and the user is not using hot water or the energy stored in the energy storage material is still sufficient. At this time, there is no need to turn on the heater 3 to quickly charge the energy storage material, that is, there is no need to turn on the rapid heating mode. Only the heat pump 200 needs to be turned on to slowly heat and charge the energy storage material. Thus, the energy conservation of the accumulator 100 can be further achieved.

[0146] Furthermore, when the ambient temperature T0 is greater than or equal to the first preset ambient temperature T01, and when the temperature T of the energy storage material is less than or equal to T3 - △T1 while the outlet water temperature T11 of the energy release heat exchange tube 121 is greater than or equal to T12 + △T2, the energy stored in the energy storage material is insufficient, but the user is using hot water. To ensure the supply of hot water and the stability of the water temperature, it is necessary to start part of the heater 3 to heat and charge the energy storage material, thereby entering the rapid heating mode, ensuring that the hot water can reach the second preset temperature T2 when the energy storage material releases all its heat, thus ensuring the supply of hot water and the stability of the water temperature, and improving the user experience. At the same time, because the ambient temperature T0 is relatively high and the heat loss of the accumulator 100 exposed to the environment is small, starting part of the heater 3 can meet the need for rapid heating, further improving the energy conservation effect of the accumulator 100.

[0147] In the present invention, the first preset ambient temperature T01 is 7°C, and both △T1 and △T2 are 2°C. However, the present invention is not limited thereto. The first preset ambient temperature T01 can also be other values, such as 6°C, 8°C, 10°C, or 12°C, etc. △T1 and △T2 can also be other values, such as 6°C, 8°C, 10°C, or 12°C, etc.

[0148] According to the control method of the accumulator 100 according to another embodiment of the present invention, the accumulator 100 is the above-mentioned accumulator 100. By having a heat storage material in the box body, the heat exchanger 1 is located in the box body, the first side plate 2 is provided at one end of the heat exchanger 1 along the second direction and is connected to the heat exchanger 1, and the heater 3 is provided on the side of the first side plate 2 facing away from the heat exchanger 1 and is in close contact with the first side plate 2. Thus, the first side plate 2 and the heat exchanger 1 form a heat bridge between the heater 3 and the heat storage material, enabling the heater 3 to heat and charge the heat storage material, thereby improving the charging efficiency of the heat storage material, improving the charging efficiency of the accumulator 100, and making the accumulator 100 fully charged.

[0149] In some embodiments of the present invention, as Figure 7 shown, while determining whether the ambient temperature T0 is greater than or equal to the first preset ambient temperature T01, the control method further includes:

[0150] Determining whether the ambient temperature T0 is less than the first preset ambient temperature T01 and greater than or equal to the second preset ambient temperature T02, where T02 < T01,

[0151] If so, control the heat pump 200 and some of the heaters 3 to turn on.

[0152] It can be understood that when the ambient temperature T0 is less than the first preset ambient temperature T01 and greater than or equal to the second preset ambient temperature T02, at this time, the ambient temperature T0 is relatively low, and it is necessary to control the heat pump 200 and some of the heaters 3 to turn on simultaneously to achieve simultaneous charging of the heat storage material to meet the user's immediate hot water demand.

[0153] Meanwhile, through the following process, the accumulator 100 can enter the quick heating mode:

[0154] Determine that the temperature T of the heat storage material is less than or equal to T3 - △T1 and the outlet water temperature T11 of the energy release heat exchange tube 121 is greater than or equal to T12 + △T2, where T3 is the phase change temperature point of the phase change material and T12 is the inlet water temperature of the energy release heat exchange tube 121;

[0155] Control some of the heaters 3 to turn on; it should be noted that the some of the heaters 3 at this time are different from the some of the heaters 3 above. When the some of the heaters 3 at this time and the some of the heaters 3 above are turned on simultaneously, it means that all the heaters 3 are turned on.

[0156] The accumulator 100 enters the rapid heating mode.

[0157] Among them, in the present invention, T02 is -20 °C, but the present invention is not limited thereto, and T02 can be other values, such as -30 °C, -25 °C, -23 °C or -21 °C, etc.

[0158] In some embodiments of the present invention, as Figure 7 shown, the control method of the accumulator 100 further includes: determining that the temperature T of the energy storage material is less than the second preset temperature T2 and the ambient temperature T0 is less than the second preset ambient temperature T02;

[0159] Controlling all heaters 3 to turn on;

[0160] The accumulator 100 enters the rapid heating mode.

[0161] It can be understood that when the ambient temperature T0 is less than the second preset ambient temperature T02, the ambient temperature T0 is very low at this time. To avoid the liquid in the heat exchange tube 12 from freezing and to ensure the user's immediate hot water demand, it is necessary to turn on all the heaters 3 to heat and charge the energy storage material, so that the accumulator 100 enters the rapid heating mode, thereby avoiding the liquid in the heat exchange tube 12 from freezing and ensuring the user's immediate hot water demand, improving the user experience.

[0162] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0163] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An accumulator, characterized in that, include: A box body, wherein the box body contains energy storage material; A heat exchanger, the heat exchanger is located in the box, the heat exchanger comprises a plurality of fins and a heat exchange tube, the plurality of fins are arranged at intervals along a first direction, and the heat exchange tube is passed through the plurality of fins; a first side plate, the first side plate being disposed at one end of the heat exchanger along a second direction and connected to the heat exchanger, the first direction being perpendicular to the second direction; A heater is arranged on a side of the first side plate away from the heat exchanger and is in close contact with the first side plate.

2. The accumulator according to claim 1, characterized in that, Also includes: A pressing spring sheet is arranged on a side of the first side plate away from the heat exchanger and connected to the first side plate, and the heater is pressed between the first side plate and the pressing spring sheet.

3. The accumulator according to claim 2, characterized in that, The compression spring comprises: A connecting portion, the connecting portion being connected to the first side plate; A pressing part, one end of which is connected to the connecting part, a cavity is defined between the pressing part and the first side plate, and the heater is disposed in the cavity.

4. The accumulator according to claim 3, characterized in that, An opening is provided on the clamping portion, and the opening is located on the side of the heater away from the first side plate. An elastic arm is provided in the opening, and one end of the elastic arm is connected to the inner wall of the opening. The elastic arm has a protruding portion protruding toward the first side plate, and the protruding portion is against the heater.

5. The accumulator according to claim 3, characterized in that, There are a plurality of heaters spaced apart from each other, and there are two clamping portions, which are respectively arranged on two opposite sides of the connecting portion and are respectively used to clamp two adjacently arranged heaters.

6. The accumulator according to claim 1, wherein, A limiting plate is provided on the side of the first side plate facing away from the heat exchanger, and the lower end of the heater is supported on the limiting plate.

7. The accumulator according to claim 1, characterized in that, The heat exchange tubes include energy-releasing heat exchange tubes and energy-storing heat exchange tubes, the energy-releasing heat exchange tubes and the energy-storing heat exchange tubes are arranged in a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

8. The accumulator according to claim 7, characterized in that, In the second direction, the flow directions of the energy-releasing heat exchange tube and the energy-storing heat exchange tube are opposite.

9. The accumulator according to claim 7, characterized in that, The heater and the energy-releasing heat exchange tube are arranged opposite to each other in the second direction; in the second direction, the outlet ends of the heater and the energy-releasing heat exchange tube are located at the same end.

10. The accumulator according to claim 1, characterized in that, Also includes: A second side plate, both ends of the heat exchanger along the first direction are provided with the second side plate, the heat exchange tube is passed through the second side plate, and the second side plate is connected to the first side plate.

11. A control method for an accumulator, characterized in that, The accumulator is an accumulator according to any one of claims 1 to 10, and the accumulator control method comprises: Controlling the accumulator to enter a rapid heating mode; Determine whether the temperature T of the energy storage material is greater than or equal to a first preset temperature T1; If so, controlling the heater to turn on; Determine that the temperature T of the energy storage material is greater than or equal to a second preset temperature T2, wherein the second preset temperature T2 is greater than the first preset temperature T1; Controlling the heater to be turned off; The energy accumulator is controlled to close the rapid heating mode.

12. The control method of the accumulator according to claim 11, characterized in that, While determining whether the temperature T of the energy storage material is greater than or equal to the first preset temperature T1, the control method further includes: Determining whether the temperature T of the energy storage material is less than the first preset temperature T1; If so, controlling the heater and the heat pump to start simultaneously; Determine that the temperature T of the energy storage material is greater than or equal to the first preset temperature T1; Turn off the heat pump.

13. A control method for an accumulator, characterized in that, The accumulator is the accumulator according to any one of claims 1-10. The heat exchange tube includes an exothermic heat exchange tube. There are multiple heaters. The accumulator control method includes: Determine that the temperature T of the energy storage material is less than the second preset temperature T2; Judge whether the ambient temperature T0 is greater than or equal to the first preset ambient temperature T01; If so, control the heat pump to turn on; Determine that the temperature T of the energy storage material is less than or equal to T3 - △T1 and the outlet water temperature T11 of the exothermic heat exchange tube is greater than or equal to T12 + △T2, where T3 is the phase change temperature point of the phase change material and T12 is the inlet water temperature of the exothermic heat exchange tube; Control some of the heaters to turn on; The accumulator enters the rapid heating mode.

14. The control method of the energy accumulator according to claim 13, characterized in that, While judging whether the ambient temperature T0 is greater than or equal to the first preset ambient temperature T01, the control method further includes: Judge whether the ambient temperature T0 is less than the first preset ambient temperature T01 and greater than or equal to the second preset ambient temperature T02, T02 < T01; If so, control the heat pump and some of the heaters to turn on.

15. The control method of the energy accumulator according to claim 13, characterized in that The accumulator control method further includes: Determine that the temperature T of the energy storage material is less than the second preset temperature T2 and the ambient temperature T0 is less than the second preset ambient temperature T02; Control all the heaters to turn on; The accumulator enters the rapid heating mode.

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