Heat exchanger assembly, heat storage device and heating and ventilation system

Abstract

The utility model discloses a heat exchanger assembly, a heat storage device and a heating and ventilation system, and relates to the technical field of heat exchange.The heat exchanger assembly comprises a first heat exchange pipe and a second heat exchange pipe which are arranged in the first direction, the first heat exchange pipe can define a heat storage flow path used for transferring heat to a phase change material, and the second heat exchange pipe can define a heat release flow path used for transferring heat to a phase change material; the first heat exchange pipes are used for absorbing heat stored by the phase change material to heat water, one ends of the first heat exchange pipes can extend in the second direction to protrude out of the second heat exchange pipes, and the second direction intersects with the first direction, so that the multiple first heat exchange pipes and the multiple second heat exchange pipes are arranged in a staggered mode in the second direction; the first heat exchange pipes and the second heat exchange pipes which are arranged in a staggered mode can increase the coverage area, or the heat exchange area between the first heat exchange pipes and the phase change materials and between the second heat exchange pipes and the phase change materials can be increased, so that heat exchange dead zones existing in the phase change materials can be reduced, the temperature distribution of the phase change materials is more uniform, and the heat exchange efficiency is improved. The overall utilization rate of the phase change material can be improved.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a heat exchanger assembly, a heat storage device, and a heating and ventilation system. Background Art

[0002] Currently, the method of using independent water tanks to store water and then heating the water to supply hot water to users has problems such as the water tanks occupying a large area, low space utilization, and the static water environment easily causing the growth of microorganisms such as Legionella.

[0003] In related technologies, a heat exchanger is embedded in and encapsulated in a phase change material to form a heat storage device. Through the heat storage and release properties of the phase change material, heat is exchanged with the water in the heat exchanger. This not only provides users with instant high-flow hot water, but also eliminates the need to use a water tank to store water, and can prevent the growth of microorganisms such as Legionella.

[0004] However, there is a "heat exchange dead zone" in the phase change material inside the heat storage device. The "heat exchange dead zone" refers to the area where the heat of the heat exchanger cannot be transferred quickly, which makes the temperature of the phase change material located in the "heat exchange dead zone" lower. This not only causes uneven temperature distribution inside the heat storage device, but also makes the phase change material located in the "heat exchange dead zone" unable to fully participate in the heat exchange process, thereby reducing the overall utilization rate of the phase change material. Utility Model Content

[0005] The embodiments of the present application provide a heat exchanger assembly, a heat storage device, and a HVAC system, which can solve the problem of uneven temperature distribution inside the heat storage device, resulting in low overall utilization of phase change materials.

[0006] In a first aspect, an embodiment of the present application provides a heat exchanger assembly embedded in a phase change material for heat exchange, the heat exchanger assembly comprising:

[0007] a first pipe structure comprising a plurality of first heat exchange tubes arranged along a first direction, wherein the first heat exchange tubes have a heat storage flow path for transferring heat to the phase change material;

[0008] a second pipe structure comprising a plurality of second heat exchange tubes arranged along the first direction, the second heat exchange tubes having a heat release flow path for absorbing heat stored in the phase change material;

[0009] Among them, at least one second heat exchange tube is provided between two adjacent first heat exchange tubes, or at least one first heat exchange tube is provided between two adjacent second heat exchange tubes, the first end of the first heat exchange tube extends in the second direction to protrude from the first end of the second heat exchange tube, and the second direction is arranged to intersect with the first direction.

[0010] In some of these embodiments, one end of the first heat exchange tube that protrudes relative to the second heat exchange tube is buried in the phase change material.

[0011] In some of these embodiments, the second end of the second heat exchange tube extends in the opposite direction of the second direction so as to protrude from the second end of the first heat exchange tube. The first end and the second end of the first heat exchange tube are opposite ends, and the first end and the second end of the second heat exchange tube are opposite ends.

[0012] In some of these embodiments, the first pipeline structure further includes a heat storage connection pipe, which has a heat storage inlet and a heat storage outlet. The opposite ends of the first heat exchange tube are respectively communicated with the heat storage inlet and the heat storage outlet;

[0013] The second pipeline structure further includes a heat release connection pipe, which has a heat release inlet and a heat release outlet. The opposite ends of the second heat exchange tube are respectively communicated with the heat release inlet and the heat release outlet;

[0014] Wherein, the part of the second heat exchange tube that protrudes relative to the first heat exchange tube forms a placement groove structure with the first heat exchange tube, and at least part of the heat storage connection pipe or at least part of the heat release connection pipe is located in the placement groove structure.

[0015] In some of these embodiments, the heat storage connection pipe includes:

[0016] A connecting branch pipe, which is communicated with the first heat exchange tube, and at least part of the connecting branch pipe is located in the placement groove structure;

[0017] A heat storage manifold, two of the heat storage manifolds are arranged at the same end of the first heat exchange tube and are communicated with the connecting branch pipe. One of the two heat storage manifolds has the heat storage inlet, and the other has the heat storage outlet.

[0018] In some of these embodiments, the opposite ends of the first heat exchange tube respectively include a first heat storage end tube and a second heat storage end tube, the first heat storage end tube and the second heat storage end tube are respectively communicated with the heat storage inlet and the heat storage outlet, and the opposite ends of the second heat exchange tube respectively include a first heat release end tube and a second heat release end tube, the first heat release end tube and the second heat release end tube are respectively communicated with the heat release inlet and the heat release outlet; wherein, the first heat storage end tube protrudes from the first heat release end tube along the second direction, and the second heat release end tube protrudes from the second heat storage end tube along the opposite direction of the second direction.

[0019] In some of these embodiments, the first heat exchange tube and the second heat exchange tube are alternately arranged in sequence along the first direction.

[0020] In some of these embodiments, the end faces of the plurality of the first heat exchange tubes protruding relative to the second heat exchange tube are flush with each other.

[0021] In some of these embodiments, the flow direction of the heat storage flow path is opposite to the flow direction of the heat release flow path.

[0022] In a second aspect, an embodiment of the present application provides a heat storage device, which includes a housing, the heat exchanger assembly as described above, and a phase change material. The heat exchanger assembly is disposed inside the housing, and the phase change material is disposed between the housing and the heat exchanger assembly.

[0023] In some of these embodiments, the heat storage device further includes a plurality of temperature sensors disposed in the phase change material. The plurality of temperature sensors are sequentially spaced along the flow direction of the heat storage flow path or the flow direction of the heat release flow path. The temperature sensors are used to measure the temperature of the phase change material around the heat storage flow path or the heat release flow path.

[0024] In some of these embodiments, the vertical distance between the temperature sensor and the heat exchanger assembly is d, and d satisfies: 4 mm ≤ d ≤ 6 mm.

[0025] In a third aspect, an embodiment of the present application provides a heating and ventilation system, which includes a heat source module, a water utilization unit, and the heat storage device as described above. The heat source module is communicated with the heat storage flow path to transfer heat to the phase change material through the heat storage flow path. The water utilization unit is communicated with the heat release flow path to transfer heat to the water utilization unit through the heat release flow path.

[0026] In some of these embodiments, the heat source module includes a main heat source unit and an auxiliary heat source unit. Both the main heat source unit and the auxiliary heat source unit are communicated with the heat storage flow path. The main heat source unit includes one of a solar heat collection module, a water source heat exchange module, and an air source heat exchange module. The auxiliary heat source unit includes an electric heating module.

[0027] In some of these embodiments, the heating and ventilation system further includes a temperature control module. The temperature control module is disposed in parallel with the heat storage device and shares the heat source module. The temperature control module is used to control the indoor temperature.

[0028] In some of these embodiments, the heating and ventilation system has:

[0029] A first working mode. When the heating and ventilation system is in the first working mode, the heat source module provides heat for the water utilization unit; and

[0030] A second working mode. When the heating and ventilation system is in the second working mode, the heat source module provides heat for the temperature control module.

[0031] A heat exchanger assembly, a heat storage device, and a heating, ventilation, and air conditioning (HVAC) system according to embodiments of the present application have at least the following beneficial effects:

[0032] By burying the heat exchanger assembly in the phase change material for heat exchange, it is possible to instantaneously supply a large flow of hot water to users without the need to use a water tank for water storage. The heat exchanger assembly includes a first heat exchange tube and a second heat exchange tube arranged in a first direction. The first heat exchange tube can define a heat storage flow path for transferring heat to the phase change material, and the second heat exchange tube can define a heat release flow path for absorbing the heat stored in the phase change material to heat water, thereby supplying hot water to users. Moreover, one end of the first heat exchange tube can extend in a second direction to protrude from the second heat exchange tube, and the second direction intersects with the first direction, such that a plurality of first heat exchange tubes and a plurality of second heat exchange tubes are arranged offset in the second direction. The offset first heat exchange tubes and second heat exchange tubes can increase the coverage area, or in other words, can increase the heat exchange area between the first heat exchange tube and the second heat exchange tube and the phase change material, thereby reducing the heat exchange dead zone of the phase change material, making the temperature distribution of the phase change material more uniform, and improving the overall utilization rate of the phase change material. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 Schematic perspective view of a heat exchanger assembly provided by an embodiment of the present application;

[0035] Figure 2 Front view of a heat exchanger assembly provided by an embodiment of the present application;

[0036] Figure 3 Side view of a heat exchanger assembly provided by an embodiment of the present application;

[0037] Figure 4 Top view of a heat exchanger assembly provided by an embodiment of the present application;

[0038] Figure 5 Schematic diagram of the internal flow path structure of a heat exchanger assembly provided by an embodiment of the present application;

[0039] Figure 6 Schematic diagram of the internal structure of a heat storage device provided by an embodiment of the present application;

[0040] Figure 7Explosion schematic diagram of the heat exchanger assembly provided by the embodiment of the present application;

[0041] Figure 8 Curve graph showing the change of the temperature of the phase change material with time during the heat storage process of the heat storage device provided by the embodiment of the present application;

[0042] Figure 9 Curve graph showing the change of the temperature of the phase change material with time during the heat release process of the heat storage device provided by the embodiment of the present application;

[0043] Figure 10 Schematic diagram of the structure of the first HVAC system provided by the embodiment of the present application;

[0044] Figure 11 Schematic diagram of the structure of the second HVAC system provided by the embodiment of the present application.

[0045] Explanation of reference numerals:

[0046] 100, HVAC system; 101, heat source module; 102, water utilization unit; 103, temperature regulation module; 10, heat storage device; 1, housing; 2, heat exchanger assembly; 21, first pipeline structure; 211, first heat exchange pipe; 2110, heat storage flow path; 2111, first end of the first heat exchange pipe; 2112, second end of the second heat exchange pipe; 2113, first heat storage end pipe; 2114, second heat storage end pipe; 212, heat storage connecting pipe; 2121, heat storage inlet; 2122, heat storage outlet; 2123, connecting branch pipe; 2124, heat storage manifold; 22, second pipeline structure; 221, second heat exchange pipe; 2210, heat release flow path; 2211, first end of the second heat exchange pipe; 2212, second end of the second heat exchange pipe; 2213, first heat release end pipe; 2214, second heat release end pipe; 222, heat release connecting pipe; 2221, heat release inlet; 2222, heat release outlet; 2223, heat release manifold; 23, placement groove structure; 3, phase change material. Detailed implementation manners

[0047] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] Please refer to Figure 1 , a heat exchanger assembly 2 provided by the embodiment of the present application, and the heat exchanger assembly 2 is arranged inside the housing 1 of the heat storage device 10 (see Figure 6) and the interior of the housing 1 can be provided with a phase change material 3. The heat exchanger assembly 2 is buried in the phase change material 3 for heat exchange. Through the heat storage device 10, a large flow of hot water can be instantaneously supplied to users without the need to store water in a water tank.

[0049] The heat exchanger assembly 2 can include a first pipeline structure 21 and a second pipeline structure 22. The first pipeline structure 21 and the second pipeline structure 22 are intertwined with each other, and both the first pipeline structure 21 and the second pipeline structure 22 are arranged in the phase change material 3 and can exchange heat with the phase change material 3.

[0050] Optionally, the first pipeline structure 21 includes a plurality of first heat exchange tubes 211. The plurality of first heat exchange tubes 211 can be arranged along a first direction. The first heat exchange tubes 211 can define a heat storage flow path 2110, such that the plurality of heat storage flow paths 2110 can be arranged along the first direction. And each heat storage flow path 2110 can meander and extend along a second direction to form a plurality of bending loops. The plurality of bending loops can reciprocally bend along a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other. The first direction is Figure 1 the positive X-axis direction in Figure 1 the negative Z-axis direction in Figure 1 the positive Y-axis direction in

[0051] Taking the example that both the first direction and the third direction are horizontal directions, and the first direction is perpendicular to the third direction, the second direction is vertically downward, and the second direction is perpendicular to the horizontal plane where the first direction and the third direction are located.

[0052] Combined with Figure 1 and Figure 2 shown, specifically, each heat storage flow path 2110 can include a plurality of straight flow paths and a plurality of U-shaped flow paths. The straight flow paths extend along the third direction, and the plurality of straight flow paths are arranged in parallel and spaced apart along the second direction. One end of two adjacent straight flow paths on the same side can be connected through a U-shaped flow path. Thus, after two straight flow paths and a U-shaped flow path are connected, a bending loop can be formed. The plurality of bending loops are sequentially connected to form the heat storage flow path 2110 that reciprocally bends along the third direction. Heat exchange through the heat storage flow path 2110 not only improves the heat exchange efficiency but also optimizes the space utilization rate.

[0053] Optionally, the second pipeline structure 22 can include a plurality of second heat exchange tubes 221, which are also arranged along the first direction. The second heat exchange tubes 221 can define a heat release flow path 2210, such that a plurality of heat release flow paths 2210 can be arranged along the first direction. The heat release flow path 2210 can also meander and extend along the second direction to form a plurality of bending loops, and the plurality of bending loops can reciprocally bend along the third direction. The shape formed by the flow path of the heat release flow path 2210 is the same as that of the flow path of the heat storage flow path 2110, which will not be elaborated here.

[0054] Combined with Figure 3 and Figure 4 As shown, at least one second heat exchange tube 221 can be provided between two adjacent first heat exchange tubes 211, or at least one first heat exchange tube 211 can be provided between two adjacent second heat exchange tubes 221. That is, a plurality of first heat exchange tubes 211 and a plurality of second heat exchange tubes 221 can be alternately arranged, such that a plurality of heat storage flow paths 2110 and a plurality of heat release flow paths 2210 are alternately arranged in the phase change material 3, which can have a better heat exchange effect.

[0055] Combined with Figure 5 As shown, the first end 2111 of the first heat exchange tube 211 can extend in the second direction to protrude from the first end 2211 of the second heat exchange tube 221, such that a plurality of first heat exchange tubes 211 and a plurality of second heat exchange tubes 221 are arranged in a staggered manner along the second direction. Dislocating the first heat exchange tube 211 and the second heat exchange tube 221 can increase the coverage area of the first heat exchange tube 211 and the second heat exchange tube 221, or rather, can increase the heat exchange area between the first heat exchange tube 211 and the second heat exchange tube 221 and the phase change material 3, thereby reducing the heat exchange dead zone existing in the phase change material 3, enabling more phase change material 3 to perform heat exchange with the first heat exchange tube 211 and the second heat exchange tube 221, and thus making the temperature distribution of the phase change material 3 located in the housing 1 more uniform, and improving the overall utilization rate of the phase change material 3.

[0056] It should be further noted that both the first heat exchange tube 211 and the second heat exchange tube 221 are finned heat exchange tubes, and the first heat exchange tube 211 and the second heat exchange tube 221 have the same specifications. The area enclosed by the first heat exchange tube 211 is the same as the area enclosed by the second heat exchange tube 221. However, after the first heat exchange tube 211 and the second heat exchange tube 221 are arranged in a staggered manner, the coverage area of the first heat exchange tube 211 and the second heat exchange tube 221 will become larger. For example, if the first heat exchange tube 211 and the second heat exchange tube 221 are staggered by a U-shaped flow path, the coverage area of the first heat exchange tube 211 and the second heat exchange tube 221 can be increased by 1.5%, thereby increasing the heat exchange area between the first heat exchange tube 211 and the second heat exchange tube 221, making the temperature of the phase change material 3 more uniform along the second direction, and improving the heat exchange efficiency.

[0057] Combine Figure 5 Optionally, the flow direction of the heat storage flow path 2110 is opposite to the flow direction of the heat release flow path 2210, so that the heat storage flow path 2110 and the heat release flow path 2210 can form a countercurrent heat exchange, that is, the hot fluid in the heat storage flow path 2110 and the cold fluid in the heat release flow path 2210 can flow in opposite directions, which can maximize the temperature difference between the hot fluid and the cold fluid, thereby improving the heat exchange efficiency.

[0058] Specifically, the hot fluid can flow into the heat storage flow path 2110 from the upper end of the first heat exchange tube 211 and flow out of the heat storage flow path 2110 from the lower end of the first heat exchange tube 211, while the cold fluid can flow into the heat release flow path 2210 from the lower end of the second heat exchange tube 221 and flow out of the heat release flow path 2210 from the upper end of the second heat exchange tube 221. Among them, as the hot fluid flows downward, the hot fluid gradually transfers heat to the phase change material 3 or the cold fluid, causing the temperature of the phase change material 3 and the cold fluid to increase, and finally the hot fluid flows out of the heat storage path 2110 from the lower end of the first heat exchange tube 211. At this time, the temperature of the hot fluid has dropped, but the temperature of the hot fluid flowing out of the heat storage path 2110 is still higher than the temperature of the cold fluid just flowing into the heat release path 2210. The cold fluid just entering the heat release path 2210 can exchange heat with the hot fluid. As the cold fluid flows upward, the cold fluid gradually absorbs heat, causing the temperature of the cold fluid itself to increase, and finally the cold fluid flows out of the heat release path 2210 from the upper end of the second heat exchange tube 221. However, the temperature of the cold fluid flowing out of the heat release path 2210 is still lower than the temperature of the hot fluid just entering the heat storage path 2110. The cold fluid can still exchange heat with the hot fluid, so that the heat can be better utilized during the transfer process, reducing the heat loss caused by the reduction in temperature difference.

[0059] See also Figure 6 In some embodiments, the end of the first heat exchange tube 211 that protrudes relative to the second heat exchange tube 221 is buried in the phase change material 3.

[0060] Optionally, the first heat exchange tube 211 defines a heat storage flow path 2110, and the second heat exchange tube 221 defines a heat release flow path 2210. The end of the heat storage flow path 2110 protruding relative to the heat release flow path 2210 is buried in the phase change material 3, so that the heat storage flow path 2110 can be in more sufficient contact with the phase change material 3, and the heat storage flow path 2110 can better transfer heat to the phase change material 3, so that the phase change material 3 can store sufficient heat more quickly.

[0061] Specifically, the lower end of the first heat exchange tube 211 protrudes downward relative to the second heat exchange tube 221, such that the lower end of the first heat exchange tube 211 protrudes relative to the lower end of the second heat exchange tube 221. That is, a part of the lower end of the heat storage flow path 2110 does not contact the heat release flow path 2210, such that a part of the lower end of the heat storage flow path 2110 does not perform heat exchange with the heat release flow path 2210. Thus, when the hot fluid flows into the heat storage flow path 2110 from the upper end of the first heat exchange tube 211 and flows out of the heat storage flow path 2110 from the lower end of the first heat exchange tube 211, the hot fluid at the lowermost end of the first heat exchange tube 211 does not perform heat exchange with the cold fluid in the heat release flow path 2210, and can directly transfer heat to the phase change material 3. Thereby, more heat can be transferred to the lower end of the phase change material 3, the temperature difference between the upper and lower ends of the phase change material 3 can be reduced, the temperature of the phase change material 3 can be made more uniform, and the heat exchange efficiency between the cold fluid in the heat release flow path 2210 and the phase change material 3 can be improved.

[0062] Please refer to Figure 5 and Figure 6 , in some embodiments, the second end 2212 of the second heat exchange tube 221 extends in the opposite direction of the second direction so as to protrude from the second end 2112 of the first heat exchange tube 211, wherein the first end 2111 and the second end 2112 of the first heat exchange tube 211 are opposite ends of the first heat exchange tube 211, and the first end 2211 and the second end 2212 of the second heat exchange tube 221 are opposite ends of the second heat exchange tube 221.

[0063] Optionally, the first end 2111 of the first heat exchange tube 211 is the lower end of the first heat exchange tube 211, the second end 2112 of the first heat exchange tube 211 is the upper end of the first heat exchange tube 211, the first end 2211 of the second heat exchange tube 221 is the lower end of the second heat exchange tube 221, the second end 2212 of the second heat exchange tube 221 is the upper end of the second heat exchange tube 221, and the upper end of the second heat exchange tube 221 protrudes upward relative to the upper end of the first heat exchange tube 211, such that the upper end of the heat release flow path 2210 is misaligned upward relative to the upper end of the heat storage flow path 2110. Thus, after the cold fluid performs heat exchange with the hot fluid that has just flowed into the heat storage flow path 2110, it can continue to flow upward in the heat release flow path 2210 for a certain distance. Thereby, the cold fluid can perform more sufficient heat exchange with the phase change material 3 in the housing 1, and the temperature of the phase change material 3 can be made more uniform.

[0064] Please refer to Figures 1 to 3, in some embodiments, the first pipeline structure 21 further includes a heat storage connection pipe 212. The heat storage connection pipe 212 has a heat storage inlet 2121 and a heat storage outlet 2122. The heat storage connection pipe 212 communicates with a plurality of first heat exchange pipes 211. In some other embodiments, the second pipeline structure 22 can include a heat release connection pipe 222. The heat release connection pipe 222 can have a heat release inlet 2221 and a heat release outlet 2222. Opposite ends of the second heat exchange pipe 221 can be respectively communicated with the heat release inlet 2221 and the heat release outlet 2222. Wherein, a portion of the second heat exchange pipe 221 protruding relative to the first heat exchange pipe 211 can form a placement groove structure 23 with the first heat exchange pipe 211. At least a portion of the heat storage connection pipe 212 or at least a portion of the heat release connection pipe 222 can be located in the placement groove structure 23.

[0065] Optionally, the heat storage connection pipe 212 communicates with a plurality of first heat exchange pipes 211, such that the heat storage inlet 2121 can communicate with inlets of a plurality of heat storage flow paths 2110, and the heat storage outlet 2122 can communicate with outlets of the plurality of heat storage flow paths 2110. Thus, the heat fluid can flow into the heat storage connection pipe 212 from the heat storage inlet 2121 and be shunted into the plurality of heat storage flow paths 2110. The heat fluid then converges at the outlets of the plurality of heat storage flow paths 2110 and flows out from the heat storage outlet 2122. Wherein, at least a portion of the heat storage connection pipe 212 can be disposed in the placement groove structure 23, thereby saving space for pipeline layout.

[0066] Please refer to Figures 1 to 3 , in some embodiments, the heat storage connection pipe 212 can include a connection branch pipe 2123 and a heat storage manifold 2124. One end of the connection branch pipe 2123 can communicate with the first heat exchange pipe 211, and the other end of the connection branch pipe 2123 can communicate with the heat storage manifold 2124. At least a portion of the connection branch pipe 2123 can be located in the placement groove structure 23, so that the groove structure can accommodate the connection branch pipe 2123, saving space for installing the pipeline.

[0067] There are two heat storage manifolds 2124. The two heat storage manifolds 2124 are disposed at the same end of the first heat exchange pipe 211. Among the two heat storage manifolds 2124, one heat storage manifold 2124 has the heat storage inlet 2121, and the other heat storage manifold 2124 has the heat storage outlet 2122. The heat storage manifold 2124 with the heat storage inlet 2121 can communicate with the upper ends of a plurality of first heat exchange pipes 211 through the connection branch pipe 2123, and the heat storage manifold 2124 with the heat storage outlet 2122 can communicate with the lower ends of the plurality of first heat exchange pipes 211 through the connection branch pipe 2123, such that the heat fluid can flow into the heat storage flow path 2110 from the upper end of the first heat exchange pipe 211 and flow out of the heat storage flow path 2110 from the lower end of the first heat exchange pipe 211.

[0068] The exothermic connection pipe 222 can include two exothermic manifolds 2223. The two exothermic manifolds 2223 and the two heat storage manifolds 2124 are arranged at the same place. Among the two exothermic manifolds 2223, one exothermic manifold 2223 has an exothermic inlet 2221, and the other exothermic manifold 2223 has an exothermic outlet 2222. The exothermic manifold 2223 with the exothermic inlet 2221 is communicated with the lower ends of a plurality of second heat exchange tubes 221 through a connecting branch pipe 2123. The exothermic manifold 2223 with the exothermic outlet 2222 is connected to the upper ends of a plurality of second heat exchange tubes 221 through a connecting branch pipe 2123, so that the cold fluid can flow into the exothermic flow path 2210 from the lower ends of the second heat exchange tubes 221 and flow out of the exothermic flow path 2210 from the upper ends of the second heat exchange tubes 221. Thus, the exothermic flow path 2210 and the heat storage flow path 2110 can form a countercurrent heat exchange, and the heat exchange efficiency can be improved.

[0069] Please refer to Figure 7 , in some embodiments, the opposite ends of the first heat exchange tube 211 can respectively include a first heat storage end tube 2113 and a second heat storage end tube 2114. The first heat storage end tube 2113 and the second heat storage end tube 2114 can be respectively communicated with the heat storage inlet 2121 and the heat storage outlet 2122. The opposite ends of the second heat exchange tube 221 can respectively include a first exothermic end tube 2213 and a second exothermic end tube 2214. The first exothermic end tube 2213 and the second exothermic end tube 2214 can be respectively communicated with the exothermic inlet 2221 and the exothermic outlet 2222.

[0070] Optionally, a first heat storage end tube 2113 is provided at the first end 2111 of the first heat exchange tube 211, a second heat storage end tube 2114 is provided at the second end 2112 of the first heat exchange tube 211, a first exothermic end tube 2213 is provided at the first end 2211 of the second heat exchange tube 221, and a second exothermic end tube 2214 is provided at the second end 2212 of the second heat exchange tube 221. That is to say, a first heat storage end tube 2113 is provided at the lower end of the first heat exchange tube 211, a second heat storage end tube 2114 is provided at the upper end of the first heat exchange tube 211, a first exothermic end tube 2213 is provided at the lower end of the second heat exchange tube 221, and a second exothermic end tube 2214 is provided at the upper end of the second heat exchange tube 221. And the first heat storage end tube 2113 is communicated with the heat storage outlet 2122, the second heat storage end tube 2114 is communicated with the heat storage inlet 2121, the first exothermic end tube 2213 is communicated with the exothermic inlet 2221, and the second exothermic end tube 2214 is communicated with the exothermic outlet 2222.

[0071] Among them, the first heat storage end tube 2113 can protrude from the first heat release end tube 2213 along the second direction, that is, the first heat storage end tube 2113 extends along the opposite direction of the Z-axis and protrudes from the first heat release end tube 2213, so that the first heat storage end tube 2113 can extend deeper into the phase change material 3 than the first heat release end tube 2213. The second heat release end tube 2214 can protrude from the second heat storage end tube 2114 along the opposite direction of the second direction, that is, the second heat release end tube 2214 extends along the positive direction of the Z-axis and protrudes from the second heat storage end tube 2114, so that the first heat exchange tube 211 and the second heat exchange tube 221 are arranged in a staggered manner along the second direction. As a result, the bottom area where heat is difficult to transfer in the phase change material 3 can exchange heat with the first heat storage end tube 2113, and more phase change material 3 can participate in the heat exchange process of the entire heat storage device 10, which can improve the overall utilization rate of the phase change material.

[0072] Please refer to Figure 5 and Figure 6 , in some embodiments, the first heat exchange tubes 211 and the second heat exchange tubes 221 can be alternately arranged in sequence along the first direction. It can also be said that there is a second heat exchange tube 221 between two adjacent first heat exchange tubes 211 along the first direction, and there is a first heat exchange tube 211 between two adjacent second heat exchange tubes 221, so that the multiple heat storage flow paths 2110 and the multiple heat release flow paths 2210 are alternately arranged in sequence along the first direction, which can effectively utilize the space and improve the heat exchange efficiency of the heat storage flow paths 2110 and the heat release flow paths 2210.

[0073] Please refer to Figure 5 and Figure 6 , in some embodiments, the end faces of the multiple first heat exchange tubes 211 protruding relative to the second heat exchange tubes 221 are flush with each other, that is, the multiple first heat exchange tubes 211 are located at the same depth position in the phase change material 3, so that the multiple first heat exchange tubes 211 can exchange heat with the phase change material 3 within the same depth range, thereby making the temperature of the phase change material 3 more uniform.

[0074] Please refer to Figure 6 , a heat storage device 10 provided by an embodiment of the present application. The heat storage device 10 can include a housing 1, a heat exchanger assembly 2, and a phase change material 3.

[0075] Optionally, the housing 1 can form a receiving cavity, and both the heat exchanger assembly 2 and the phase change material 3 can be arranged in the receiving cavity, so that the heat exchanger assembly 2 is buried in the phase change material 3, and thus the heat exchanger assembly 2 can exchange heat with the phase change material 3.

[0076] Optionally, the heat storage device 10 can further include a plurality of temperature sensors. The plurality of temperature sensors can be disposed in the phase change material 3 and are sequentially arranged at intervals along the flow direction of the heat storage flow path 2110, so that the plurality of temperature sensors can measure the temperature of the phase change material 3 around the heat storage flow path 2110. Alternatively, the plurality of temperature sensors are sequentially arranged at intervals along the flow direction of the heat release flow path 2210, so that the plurality of temperature sensors can measure the temperature of the phase change material 3 around the heat release flow path 2210.

[0077] In some embodiments, the heat storage device 10 is provided with eight temperature sensors. The eight temperature sensors are sequentially arranged at intervals along the flow direction of the heat storage flow path 2110. All the eight temperature sensors are used to measure the temperature of the phase change material 3 around the heat storage flow path 2110. Among them, the first temperature sensor is disposed near the heat storage header 2124, and the temperature of the phase change material 3 measured by the first temperature sensor is represented by T1. The second to fourth temperature sensors are sequentially arranged at intervals along the flow direction of the heat storage flow path 2110 near the first heat exchange tube 211. The temperatures of the phase change material 3 measured by the second to fourth temperature sensors are respectively represented by T2, T3, and T4. The fifth to seventh temperature sensors are sequentially arranged at intervals near the connecting branch pipe 2123. The temperatures of the phase change material 3 measured by the fifth to seventh temperature sensors are respectively represented by T5, T6, and T7. The eighth temperature sensor is disposed near the bottom of the first heat exchange tube 211, and the temperature of the phase change material 3 measured by the eighth temperature sensor is represented by T8.

[0078] During the heat storage process of the heat storage device 10, the hot fluid flows into the heat storage flow path 2110 and transfers heat to the phase change material 3 through the heat storage flow path 2110. After the phase change material 3 absorbs heat, its temperature gradually rises. At this time, the temperatures of the phase change material 3 measured by the eight temperature sensors change with time as Figure 8 shown in the curve graph. The curve with dots represents the change trend of the temperature of the phase change material 3 with time after the first heat exchange tube 211 and the second heat exchange tube 221 are arranged in a staggered manner in the present application, while the curve with triangles represents the change trend of the temperature of the phase change material 3 with time when the first heat exchange tube 211 and the second heat exchange tube 221 are not arranged in a staggered manner. It can be clearly seen that during the heat storage process, the heat exchanger assembly 2 arranged in a staggered manner can heat the phase change material 3 to the highest temperature faster.

[0079] During the heat release process of the heat storage device 10, the cold fluid flows into the heat release flow path 2210 and absorbs the heat stored in the phase change material 3 through the heat release flow path 2210. After the phase change material 3 releases heat, its temperature gradually decreases. At this time, the temperatures of the phase change material 3 measured by the eight temperature sensors are as Figure 9 shown. Similarly, Figure 9The curve in it can represent the change of the temperature of the phase change material 3 over time. The line with dots drawn represents the change of the temperature of the phase change material 3 over time after the first heat exchange tube 211 and the second heat exchange tube 221 are arranged in a staggered manner in this application, while the line with triangles drawn represents the change of the temperature of the phase change material 3 over time when the first heat exchange tube 211 and the second heat exchange tube 221 are not arranged in a staggered manner. It can be clearly seen that during the heat release process, the heat exchanger assembly 2 with staggered arrangement can absorb the heat of the phase change material 3 faster, so that the temperature of the cold fluid can rise faster and the heat exchange efficiency is better.

[0080] In some embodiments, the vertical distance between the temperature sensor and the heat exchanger assembly 2 is d, and d satisfies: 4mm ≤ d ≤ 6mm. Since the heat transfer radius of the heat exchange tube is generally 7mm, when d is less than or equal to 6mm, the temperature sensor can be within the heat transfer radius of the heat exchanger assembly 2, so that the temperature change brought by the heat exchanger assembly 2 to the phase change material 3 can be accurately measured. When d is less than 4mm, the gap between the temperature sensor and the heat exchanger assembly 2 is too small, resulting in the temperature measurement of the phase change material 3 by the temperature sensor being affected by the heat exchanger assembly 2 and causing inaccurate measurement. Therefore, when d satisfies: 4mm ≤ d ≤ 6mm, the temperature sensor can measure the temperature of the phase change material 3 more accurately.

[0081] Please refer to Figure 10 , in some embodiments, a heating ventilation and air conditioning (HVAC) system 100 provided by an embodiment of this application is provided. The HVAC system 100 can provide hot water to users in real time. The HVAC system 100 includes a heat source module 101, a water utilization unit 102, and a heat storage device 10.

[0082] Specifically, the heat source module 101 can be connected to the heat storage flow path 2110, the hot fluid in the heat source module 101 can flow into the heat storage flow path 2110, the heat storage flow path 2110 can transfer heat to the phase change material 3, and the water utilization unit 102 can be connected to the heat release flow path 2210. After the cold water flows into the heat release flow path 2210, it can absorb the heat of the phase change material 3. After the cold water is heated into hot water, it can be used by users, so that clean hot water can be provided to users in real time without setting up a water tank to store hot water.

[0083] Optionally, the heat source module 101 can include a main heat source unit and an auxiliary heat source unit. Both the main heat source unit and the auxiliary heat source unit can be connected to the heat storage flow path 2110 and can transfer heat to the phase change material 3 through the heat storage flow path 2110.

[0084] The main heat source unit can include one of a solar heat collection module, a water source heat exchange module, and an air source heat exchange module. When conditions permit, more environmentally friendly natural energy sources such as the solar heat collection module, the water source heat exchange module, and the air source heat exchange module are preferably used to exchange heat with the phase change material 3, thereby saving energy.

[0085] The auxiliary heat source unit includes an electric heating module. When the main heat source unit has insufficient energy supply, the auxiliary heat source unit can be used to provide energy to ensure the stability and continuity of the heat energy supply.

[0086] Please refer to Figure 11 , in some embodiments, the HVAC system 100 can further include a temperature adjustment module 103. The temperature adjustment module 103 can be arranged in parallel with the heat storage device 10 and share the heat source module 101, and the HVAC system 100 further has a first working mode and a second working mode.

[0087] When the HVAC system 100 is in the first working mode, the heat source module 101 can provide heat to the phase change material 3, so that the water utilization unit 102 can absorb the heat stored in the phase change material 3 to heat cold water, thereby providing hot water for users; when the HVAC system 100 is in the second working mode, the heat source module 101 can provide heat to the temperature adjustment module 103, so that the temperature adjustment module 103 can be used to adjust the indoor temperature.

[0088] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0089] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A heat exchanger assembly, characterized in that, It is buried in the phase change material for heat exchange. The heat exchanger assembly includes: A first pipeline structure, including a plurality of first heat exchange tubes arranged along a first direction. The first heat exchange tube has a heat storage flow path for transferring heat to the phase change material. A second pipeline structure, including a plurality of second heat exchange tubes arranged along the first direction. The second heat exchange tube has a heat release flow path for absorbing the heat stored in the phase change material. Wherein, at least one second heat exchange tube is provided between two adjacent first heat exchange tubes, or at least one first heat exchange tube is provided between two adjacent second heat exchange tubes. The first end of the first heat exchange tube extends in a second direction to protrude from the first end of the second heat exchange tube, and the second direction intersects with the first direction.

2. The heat exchanger assembly according to claim 1, wherein The protruding end of the first heat exchange tube relative to the second heat exchange tube is buried in the phase change material.

3. The heat exchanger assembly according to claim 1, wherein The second end of the second heat exchange tube extends in the opposite direction of the second direction to protrude from the second end of the first heat exchange tube. The first end and the second end of the first heat exchange tube are opposite ends, and the first end and the second end of the second heat exchange tube are opposite ends.

4. The heat exchanger assembly according to claim 3, wherein: The first pipeline structure further includes a heat storage connection pipe having a heat storage inlet and a heat storage outlet. The opposite ends of the first heat exchange tube are respectively communicated with the heat storage inlet and the heat storage outlet. The second pipeline structure further includes a heat release connection pipe having a heat release inlet and a heat release outlet. The opposite ends of the second heat exchange tube are respectively communicated with the heat release inlet and the heat release outlet. Wherein, the protruding part of the second heat exchange tube relative to the first heat exchange tube forms a placement groove structure with the first heat exchange tube, and at least part of the heat storage connection pipe or at least part of the heat release connection pipe is located in the placement groove structure.

5. The heat exchanger assembly according to claim 4, wherein, The heat storage connection pipe includes: A connecting branch pipe communicated with the first heat exchange tube, and at least part of the connecting branch pipe is located in the placement groove structure. A heat storage header pipe. Two heat storage header pipes are arranged at the same end of the first heat exchange tube and communicated with the connecting branch pipe. One of the two heat storage header pipes has the heat storage inlet, and the other has the heat storage outlet.

6. The heat exchanger assembly according to claim 4, wherein, The opposite ends of the first heat exchange tube respectively include a first heat storage end pipe and a second heat storage end pipe, which are respectively communicated with the heat storage inlet and the heat storage outlet. The opposite ends of the second heat exchange tube respectively include a first heat release end pipe and a second heat release end pipe, which are respectively communicated with the heat release inlet and the heat release outlet. Wherein, the first heat storage end pipe protrudes in the second direction from the first heat release end pipe, and the second heat release end pipe protrudes in the opposite direction of the second direction from the second heat storage end pipe.

7. The heat exchanger assembly according to claim 1, wherein, The first heat exchange tube and the second heat exchange tube are arranged alternately in sequence along the first direction.

8. The heat exchanger assembly according to claim 1, characterized in that, The end faces of multiple first heat exchange tubes protruding relative to the second heat exchange tube are flush with each other.

9. The heat exchanger assembly according to claim 1, characterized in that, The flow direction of the heat storage flow path is opposite to that of the heat release flow path.

10. A heat storage device, characterized in that, Comprising: A housing; A heat exchanger assembly as described in any one of claims 1-9, the heat exchanger assembly being disposed inside the housing; A phase change material, the phase change material being disposed between the housing and the heat exchanger assembly.

11. The heat storage device according to claim 10, characterized in that, The heat storage device further comprises: A plurality of temperature sensors disposed in the phase change material, the plurality of temperature sensors being sequentially spaced along the flow direction of the heat storage flow path or the flow direction of the heat release flow path, the temperature sensors being used to measure the temperature of the phase change material around the heat storage flow path or the heat release flow path.

12. The heat storage device according to claim 11, characterized in that, The vertical distance between the temperature sensor and the heat exchanger assembly is d, and d satisfies: 4mm ≤ d ≤ 6mm.

13. A heating, ventilation and air conditioning (HVAC) system, characterized in that, Comprising a heat source module, a water utilization unit, and a heat storage device as described in any one of claims 10-12, the heat source module being in communication with the heat storage flow path to transfer heat to the phase change material through the heat storage flow path, and the water utilization unit being in communication with the heat release flow path to transfer heat to the water utilization unit through the heat release flow path.

14. The HVAC system according to claim 13, wherein The heat source module includes a main heat source unit and an auxiliary heat source unit, both the main heat source unit and the auxiliary heat source unit being in communication with the heat storage flow path, the main heat source unit including one of a solar heat collection module, a water source heat exchange module, and an air source heat exchange module, and the auxiliary heat source unit including an electric heating module.

15. The HVAC system according to claim 13, characterized in that, Further comprising a temperature control module, the temperature control module being disposed in parallel with the heat storage device and sharing the heat source module, the temperature control module being used to control the indoor temperature.

16. The HVAC system according to claim 15, characterized in that, The heating, ventilation, and air conditioning (HVAC) system has: A first working mode, when the HVAC system is in the first working mode, the heat source module provides heat for the water utilization unit; and A second working mode, when the HVAC system is in the second working mode, the heat source module provides heat for the temperature control module.

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