Phase change heat storage and air source heat pump combined heating system

Abstract

The present invention provides a phase-change heat storage and air-source heat pump combined heating system, which belongs to the technical field of heating systems, including an air-source heat pump, a phase-change heat storage device, an auxiliary instant heating device, a heating water collector, and a tailwater water collector; the air-source heat pump is connected to a first water supply pipeline and a first water return pipeline; the phase-change heat storage device is connected to a second water supply pipeline and a second water return pipeline; the auxiliary instant heating device is connected to a third water supply pipeline and a third water return pipeline; the third water supply pipeline is provided with a first instant heating auxiliary pipeline and a second instant heating auxiliary pipeline. The phase-change heat storage and air-source heat pump combined heating system provided by the present invention uses the phase-change heat storage device and the air-source heat pump as the main heat sources, and makes them operate alternately, so as to achieve the purpose of stabilizing the system and realizing energy saving; in addition, the auxiliary instant heating device can realize instant heating in the initial stage of heating and auxiliary heating of the main heat source, thereby ensuring the heating efficiency and safe and stable operation of the heating system.

Description

Technical Field

[0001] The present invention belongs to the technical field of heating systems, and more specifically, relates to a heating system combining phase change heat storage and air source heat pump. Background Art

[0002] Phase change thermal storage heating is a heat storage or release method that utilizes the characteristic of materials that can absorb or release a large amount of latent heat when their phase changes from solid to liquid or liquid to gas. Compared with the traditional temperature-changing heat storage process, it has the advantages of low cost, large phase change latent heat, and a wide phase change temperature range. The heat storage device has a large heat storage capacity per unit volume, a small size of the heat storage equipment, and saves equipment space. In addition, the heat storage device has a long lifespan of no less than 20 years, which can reduce investment in power construction, reduce consumption of power generation resources, and reduce emissions of harmful substances such as carbon dioxide and coal smoke.

[0003] The basic structure of the currently commonly used valley electricity phase change thermal storage heating includes a reflux pump, an electric heating boiler, a heat storage tank, a heating heat exchanger plate and a control device. A salt column is arranged in the heat storage tank, and the salt column is filled with phase change thermal storage material. At night, valley electricity is used to heat water through an electric heating boiler and then circulate into the heat storage tank. When the temperature in the heat storage tank reaches the phase change temperature of the phase change thermal storage material, the phase change thermal storage material changes from solid to liquid, absorbing heat during the process. During the day, electric heating is stopped, and the heat stored in the phase change thermal storage material is used to heat the water in the heat storage tank for heating.

[0004] This heating system has a single heating mode. The number of users and heating load of the centralized heating system are changing dynamically. With the increase of users or the increase of heating load, higher heat energy supply is required. When the heating load exceeds the design capacity or the ambient temperature is too low, causing the heating load to increase, the single phase change heating mode will not be able to meet the heating demand. In addition, the thermal conductivity of the phase change material filled in the salt column used in the phase change thermal storage tank is very low. When working, the phase change material near the center of the salt column takes a long time to reach the working temperature. In addition, since the salt column works at high temperature for a long time, the volume of the phase change material will also change during the phase change. If the salt column is not tightly sealed or the salt column body leaks due to hot water or corrosion of the phase change material, the overall sealed system cannot detect the salt column leakage in time. The structure of the heat exchange box and the salt column in the prior art affects the overall heat exchange efficiency of the heat exchange box, increases the number of cycles of the hot water, and it is difficult to detect the leakage of the salt column in time. Due to the existence of these problems in the prior art, the current phase change thermal storage heating system has unstable heating and high maintenance difficulty, which affects the promotion of the phase change thermal storage heating system in the field of civil heating. Summary of the invention

[0005] The object of the present invention is to provide a phase change heat storage and air source heat pump combined heating system, aiming to solve the problem of unstable heating in the existing phase change heat storage heating system.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a phase change heat storage and air source heat pump combined heating system, including: an air source heat pump, a phase change heat storage device, an auxiliary instant heating device, a heating water collector, and a tail water collector; the air source heat pump is connected to a first water supply pipeline and a first water return pipeline; the phase change heat storage device is connected to a second water supply pipeline and a second water return pipeline; the auxiliary instant heating device is connected to a third water supply pipeline and a third water return pipeline; the first water supply pipeline, the second water supply pipeline and the third water supply pipeline are connected to the first water supply pipeline, the second water supply pipeline and the third water return pipeline. The water pipelines are all connected to the heating water collector, and the first return water pipeline, the second return water pipeline and the third return water pipeline are all connected to the tailwater water collector; the third water supply pipeline is provided with a first instant heating auxiliary pipeline and a second instant heating auxiliary pipeline, and the first instant heating auxiliary pipeline is connected and the second instant heating auxiliary pipeline is connected to the first return water pipeline and the second return water pipeline respectively; a first heat storage pipeline is connected between the first water supply pipeline and the second return water pipeline, and a second heat storage pipeline is connected between the second water supply pipeline and the first return water pipeline.

[0007] As another embodiment of the present application, the third water supply pipeline and the third water return pipeline are connected to the phase change heat storage device via a heat exchanger.

[0008] As another embodiment of the present application, the phase change heat storage device includes:

[0009] A shell, wherein a water inlet pipe and a water outlet pipe are provided on the shell; and a plurality of salt columns are arranged in the shell;

[0010] A capillary heat exchange component is attached to one side of the salt column, and a water flow channel is provided in the capillary heat exchange component, and two ends of the water flow channel are respectively connected to the water inlet pipe and the water outlet pipe.

[0011] As another embodiment of the present application, the capillary heat exchange component is annular, and there are multiple capillary heat exchange components. The multiple capillary heat exchange components are sequentially spaced and nested, and the multiple capillary heat exchange components enclose a plurality of heat storage chambers for accommodating the salt columns.

[0012] As another embodiment of the present application, the capillary heat exchange component includes a first capillary heat exchange component and a second capillary heat exchange component, the second capillary heat exchange component is sleeved on the outside of the first capillary heat exchange component, and the second capillary heat exchange component is coaxial with the first capillary heat exchange component and is spaced apart; the upper ends of the first capillary heat exchange component and the second capillary heat exchange component are connected to the water inlet pipe, and the lower ends of the first capillary heat exchange component and the second capillary heat exchange component are connected to the water outlet pipe.

[0013] As another embodiment of the present application, the bottom of the shell has a water collecting tank, which is circular or annular; the water collecting tank connects the lower ends of the first capillary heat exchange component and the second capillary heat exchange component; the upper end of the first capillary heat exchange component is connected to the water inlet pipe; the upper end of the second capillary heat exchange component is connected to the water outlet pipe.

[0014] As another embodiment of the present application, the capillary heat exchange component includes an outer shell and a flow guide member located inside the outer shell, the inner cavity of the outer shell is formed with the aid of the flow guide member into a plurality of spaced-apart annular flow channels, a plurality of auxiliary flow channels are provided between two adjacent annular flow channels, and the auxiliary flow channels are arranged at an angle to the axial direction of the outer shell.

[0015] As another embodiment of the present application, the guide member is an isosceles triangle, the auxiliary flow channel is located on both sides of the isosceles triangle, the auxiliary flow channel includes a first flow channel and a second flow channel respectively located on both sides of the guide member, the first flow channel and the second flow channel are both located between two adjacent annular flow channels, and the upper ends or lower ends of the first flow channel and the second flow channel are connected.

[0016] As another embodiment of the present application, the upper ends of the first capillary heat exchange component and the second capillary heat exchange component are connected by means of a plurality of connecting pipes, and the connecting pipes are arranged along the radial direction of the first capillary heat exchange component; the upper end of the second capillary heat exchange component is connected to the water inlet pipe, and the lower end of the second capillary heat exchange component is connected to the water outlet pipe.

[0017] As another embodiment of the present application, the first capillary heat exchange component has a first support frame with a circular cross-section on the inner side, and a plurality of first limiting holes for limiting the salt column are evenly distributed on the first support frame; a second support frame is provided between the first capillary heat exchange component and the second capillary heat exchange component, and a plurality of second limiting holes for limiting the salt column are evenly distributed on the second support frame.

[0018] The beneficial effects of the phase change heat storage and air source heat pump combined heating system provided by the present invention are: compared with the prior art, the phase change heat storage and air source heat pump combined heating system of the present invention uses the phase change heat storage device and the air source heat pump as the main heat source, and makes them operate alternately, thereby reducing the consumption of power generation resources, and achieving the purpose of stabilizing the system and saving energy; in addition, the auxiliary instant heating device can realize instant heating in the initial stage of heating and auxiliary heating of the main heat source, thereby improving the heating efficiency and user experience. At the same time, the auxiliary instant heating device as a backup heat source ensures the heating efficiency and safe and stable operation of the heating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a phase change heat storage and air source heat pump combined heating system provided in the first embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of a phase change heat storage and air source heat pump combined heating system provided in the second embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the structure of a phase change heat storage and air source heat pump combined heating system provided in the third embodiment of the present invention;

[0023] Figure 4 A schematic structural diagram of a phase change heat storage device provided in the first embodiment of the present invention;

[0024] Figure 5 A schematic structural diagram of a phase change heat storage device provided in a second embodiment of the present invention;

[0025] Figure 6 For along Figure 5 Sectional view along line AA;

[0026] Figure 7 It is a schematic diagram of the side wall of the capillary heat exchange component in the present invention;

[0027] Figure 8 A top view of the first support frame in the present invention;

[0028] Fig. 9 It is a top view of the second support frame in the present invention.

[0029] In the figure: 1, air source heat pump; 2, phase change heat storage device; 3, auxiliary instant heating device; 4, heating water collector; 5, tail water collector; 6, first water supply pipeline; 7, second water supply pipeline; 8, third water supply pipeline; 9, first return water pipeline; 10, second return water pipeline; 11, third return water pipeline; 12, first instant heating auxiliary pipeline; 13, second instant heating auxiliary pipeline; 14, first heat storage pipeline; 15, second heat storage pipeline; 16, heat exchanger; 17, shell; 1 8. Insulation layer; 19. First capillary heat exchange component; 20. Second capillary heat exchange component; 21. First heat storage chamber; 22. Second heat storage chamber; 23. Water collecting tank; 24. Water inlet pipe; 25. Water outlet pipe; 26. Connecting pipe; 27. Water storage chamber; 28. Water hole; 29. ​​First flow guide; 30. Second flow guide; 31. Annular flow channel; 32. Auxiliary flow channel; 33. First support frame; 34. First limit hole; 35. Second support frame; 36. Second limit hole. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] See also Figures 1 to 9 The phase change heat storage and air source heat pump 1 combined heating system provided by the present invention is now described. The phase change heat storage and air source heat pump 1 combined heating system comprises an air source heat pump 1, a phase change heat storage device 2, an auxiliary instant heating device 3, a heating water collector 4, and a tail water collector 5; the air source heat pump 1 is connected to a first water supply pipeline 6 and a first return water pipeline 9; the phase change heat storage device 2 is connected to a second water supply pipeline 7 and a second return water pipeline 10; the auxiliary instant heating device 3 is connected to a third water supply pipeline 8 and a third return water pipeline 11; the first water supply pipeline 6, the second water supply pipeline 7 and the third water supply pipeline 8 are all connected to the heating water collector 4 The first return water pipeline 9, the second return water pipeline 10 and the third return water pipeline 11 are all connected to the tailwater collector 5; the third water supply pipeline 8 is provided with a first instant heating auxiliary pipeline 12 and a second instant heating auxiliary pipeline 13, the first instant heating auxiliary pipeline 12 is connected to the first return water pipeline 9 and the second return water pipeline 10 respectively; a first heat storage pipeline 14 is connected between the first water supply pipeline 6 and the second return water pipeline 10, and a second heat storage pipeline 15 is connected between the second water supply pipeline 7 and the first return water pipeline 9.

[0032] The phase change heat storage and air source heat pump 1 combined heating system provided by the present invention is compared with the prior art. The prior art adopts a phase change heat storage system for heating, which releases the heat stored by electric heating at night during the day to achieve energy saving. However, the heating load changes dynamically, and a single phase change heating method cannot meet the heating demand. Therefore, the air source heat pump 1 and the phase change heat storage device 2 are used as the main heat sources alternately connected, and the auxiliary instant heating device 3 is an auxiliary heat source to adapt to the change of the heating load.

[0033] When the air source heat pump 1 works alone, the first water supply pipe is connected to the heating water collector 4, and the first water return pipe is connected to the tail water collector 5; when the phase change heat storage device 2 works alone, the second water supply pipe is connected to the heating water collector 4, and the second water return pipe is connected to the tail water collector 5; when the auxiliary instant heating device 3 works alone, the third water supply pipe is connected to the heating water collector 4, and the third water return pipe is connected to the tail water collector 5. When the air source heat pump 1 stores heat for the phase change heat storage device 2, the first water supply pipe is connected to the second water return pipe by means of the first heat storage pipeline 14, and the second water supply pipe is connected to the first water return pipe by means of the second heat storage pipeline 15. When the auxiliary instant heating device 3 assists the air source heat pump 1 to start, the third water supply pipeline 8 is connected to the first water return pipeline 9 by means of the first instant heating auxiliary pipeline 12; when the auxiliary instant heating device 3 assists the phase change heat storage device 2 to start, the third water supply pipeline 8 is connected to the second water return pipeline 10 by means of the second instant heating auxiliary pipeline 13.

[0034] First, in order to improve the heating efficiency, during the day, the phase change heat storage device 2 is mainly used as the first heat source, and the air source heat pump 1 is used as the second heat source to supplement the peak heat load deficiency; at night, the air source heat pump 1 is mainly used as the first heat source, and the phase change heat storage device 2 is used as the second heat source, and the night electricity valley is used to maintain the normal operation of the heating; at the same time, the air source heat pump 1 removes the heat required by the user end, and the remaining heat is transported to the phase change heat storage device 2 for storage for subsequent daytime heating.

[0035] The auxiliary instant heating device 3 is an instant heating device mainly based on electric boilers and gas boilers, and its main features are fast heating and high energy efficiency. Since both the air heat pump and the phase change heat storage device 2 require a heating process, and the heating process is relatively long, the auxiliary instant heating device 3 is turned on at the initial stage of heating, and is used as the main heat source for direct connection to the user end to improve the user experience; in addition, at the initial stage of heating, in order to facilitate the timely heating of the first heat source and the second heat source, the auxiliary instant heating device 3 turns on the first instant heating auxiliary pipeline 12 or the second instant heating auxiliary pipeline 13. At this time, the higher temperature water supply in the third water supply pipeline 8 enters the first heat source or the second heat source through the first instant heating auxiliary pipeline 12 or the second instant heating auxiliary pipeline 13, so that the water temperature in the first water supply pipeline 6 or the second water supply pipeline 7 corresponding to the heat source can be increased in time to shorten the heating time of the first heat source or the second heat source.

[0036] Taking the air source heat pump 1 as the first heat source and the phase change heat storage device 2 as the second heat source as an example, the third water supply pipeline 8 and the first instant heating auxiliary pipeline 12 are both opened, wherein part of the water flow in the third water supply pipeline 8 enters the heating manifold 4, and the remaining part of the water flow enters the first instant heating auxiliary pipeline 12, and enters the first return water pipeline 9 through the first instant heating auxiliary pipeline 12; the water flow is relatively high temperature water, and the relatively high temperature water in the first instant heating auxiliary pipeline 12 is mixed with the low temperature water in the original first return water pipeline 9, thereby increasing the temperature of the water in the first return water pipeline 9, so that in the circulation heating of the air source heat source, a small amount of heat energy can be used to reach the required temperature, thereby accelerating the circulation and startup of the air source heat pump 1; until the air source heat pump 1 is fully started, the first instant heating auxiliary pipeline 12 and the third water supply pipeline 8 are closed, and the air source heat pump 1 is used as the first heat source for heating. Similarly, when the phase change heat storage device 2 is used as the first heat source, the third water supply pipeline 8 and the second instant heating auxiliary pipeline 13 are both opened until the phase change heat storage device 2 is fully started, and then the second instant heating auxiliary pipeline 13 and the third water supply pipeline 8 are closed.

[0037] The auxiliary instant heating device 3 serves as a backup heat source and can be added to the heating system at any time to improve the heating efficiency and ensure the safe and stable operation of the heating system.

[0038] The phase change heat storage and air source heat pump 1 combined heating system provided by the present invention uses the phase change heat storage device 2 and the air source heat pump as the main heat sources, which are operated alternately to reduce the consumption of power generation resources, thereby achieving the purpose of stabilizing the system and saving energy; in addition, the auxiliary instant heating device 3 can realize instant heating in the initial stage of heating and auxiliary heating of the main heat source, thereby improving the heating efficiency and user experience. At the same time, the auxiliary instant heating device 3 as a backup heat source ensures the heating efficiency and safe and stable operation of the heating system.

[0039] In some possible embodiments, see Figure 2 The third water supply pipeline 8 and the third water return pipeline 11 are connected to the phase change heat storage device 2 via the heat exchanger 16 .

[0040] Specifically, a heat exchanger 16 is arranged outside the phase change heat storage device 2, and an independent set of water supply and return pipelines is provided inside the phase change heat storage device 2, which are connected to the third water supply pipeline 8 and the third water return pipeline 11 after heat exchange, so as to avoid the water quality in the tailwater collector 5 affecting the circulating water supply pipeline in the phase change heat storage device 2.

[0041] Optionally, a heat carrier circulation pipeline is provided between the phase change heat storage device 2 and the heat exchanger 16, and the heat carrier may be water or other working fluids.

[0042] Optionally, the heat exchanger 16 is a plate heat exchanger 16, and the heat exchanger 16 is used to exchange heat in the heat carrier with heat in the third supply and return water pipeline.

[0043] In some possible embodiments, see Figure 4 The phase change heat storage device 2 includes a shell 17 and a capillary heat exchange component; the shell 17 is provided with a water inlet pipe 24 and a water outlet pipe 25; the shell 17 has multiple salt columns; the capillary heat exchange component is attached to one side of the salt column, and the capillary heat exchange component has a water flow channel, and the two ends of the water flow channel are respectively connected to the water inlet pipe 24 and the water outlet pipe 25.

[0044] Specifically, the shell 17 is a cylindrical metal shell 17 , to which a water inlet pipe 24 and a water outlet pipe 25 are connected. The water inlet pipe 24 and the water outlet pipe 25 are two pipes in the heat medium circulation pipeline connected to the heat exchanger 16 .

[0045] The salt column serves as the phase change material of the phase change heat storage device 2 and is fixed in the inner cavity of the shell 17. A capillary heat exchange component is provided on the side of the salt column. A water flow channel is provided inside the capillary heat exchange component. The upper end of the water flow channel is an inlet, which is connected to the water inlet pipe 24; the lower end of the water flow channel is an outlet, which is connected to the water outlet pipe 25.

[0046] The capillary heat exchange component is made of metal, and the capillary heat exchange component fits the side wall of the salt column for heat exchange.

[0047] Optionally, a heat preservation layer 18 is provided on the side wall of the shell 17, the outer side of the capillary heat exchange component is attached to the inner side of the heat preservation layer 18, and the inner side of the capillary heat exchange component is attached to the outer side wall of the salt column. The capillary heat exchange component is located outside the multiple salt columns.

[0048] In some possible embodiments, see Figure 5 and Figure 6 The capillary heat exchange component is annular, and there are multiple capillary heat exchange components. The multiple capillary heat exchange components are sequentially spaced and nested, and the multiple capillary heat exchange components enclose a number of heat storage chambers for accommodating salt columns.

[0049] The capillary heat exchange component is annular, and multiple annular capillary heat exchange components are coaxially arranged and connected in sequence, and two adjacent capillary heat exchange components are arranged at intervals. Multiple capillary heat exchange components are connected in parallel. The upper part of the shell 17 has a first collecting pipe, and the first collecting pipe is connected to the inlet of the upper end of the multiple capillary heat exchange components; the lower part of the shell 17 has a second collecting pipe, and the second collecting pipe is connected to the outlet of the lower end of the multiple capillary heat exchange components.

[0050] The heat storage chamber is located between two adjacent capillary heat exchange components, and multiple salt columns are fixed in the heat storage chamber. When storing heat, the salt column is subjected to heat transfer from both the outside and the inside, which can increase the heating speed of the salt column.

[0051] Since the capillary heat exchange component is annular, the heat storage cavity is annular or circular, and multiple heat storage cavities are coaxially arranged.

[0052] In some possible embodiments, see Figure 4 , Figure 5 and Figure 6 The capillary heat exchange component includes a first capillary heat exchange component 19 and a second capillary heat exchange component 20. The second capillary heat exchange component 20 is sleeved on the outside of the first capillary heat exchange component 19. The second capillary heat exchange component 20 is coaxial with the first capillary heat exchange component 19 and is spaced apart. The upper ends of the first capillary heat exchange component 19 and the second capillary heat exchange component 20 are connected to the water inlet pipe 24, and the lower ends of the first capillary heat exchange component 19 and the second capillary heat exchange component 20 are connected to the water outlet pipe 25.

[0053] Specifically, the capillary heat exchange component includes a first capillary heat exchange component 19 and a second capillary heat exchange component 20, both of which are annular, and the inner diameter of the second capillary heat exchange component 20 is larger than the outer diameter of the first capillary heat exchange component 19. The second capillary heat exchange component 20 is sleeved on the outside of the first capillary heat exchange component 19, and the outer wall of the second capillary heat exchange component 20 is in contact with the inner wall of the thermal insulation layer 18 on the inner side of the shell 17.

[0054] The circular space inside the first capillary heat exchange component 19 is the first heat storage chamber 21, and the annular space between the second capillary heat exchange component 20 and the first capillary heat exchange component 19 is the second heat storage chamber 22. The first heat storage chamber 21 mainly exchanges heat with the first capillary heat exchange component 19; the second heat storage chamber 22 exchanges heat with the first capillary heat exchange component 19 and the second capillary heat exchange component 20 at the same time.

[0055] Since the first capillary heat exchange component 19 and the second capillary heat exchange component 20 are connected in parallel, the salt column in the first heat storage chamber 21 and the salt column in the second heat storage chamber 22 are both heat storage media with the same temperature.

[0056] When releasing heat, the salt columns in the first heat storage chamber 21 and the second heat storage chamber 22 release heat simultaneously, and exchange heat with the first capillary heat exchange component 19 and the second capillary heat exchange component 20 at the same time, and are connected to the heat exchanger 16 via the water inlet pipe 24 and the water outlet pipe 25, so as to heat the water in the second water supply pipeline 7.

[0057] In some possible embodiments, see Figure 4 The bottom of the shell 17 has a water collecting tank 23, which is circular or annular; the water collecting tank 23 is connected to the lower ends of the first capillary heat exchange component 19 and the second capillary heat exchange component 20; the upper end of the first capillary heat exchange component 19 is connected to the water inlet pipe 24; the upper end of the second capillary heat exchange component 20 is connected to the water outlet pipe 25.

[0058] The first capillary heat exchange component 19 and the second capillary heat exchange component 20 are both annular. The upper end of the first capillary heat exchange component 19 is connected to the water inlet pipe 24, and the upper end of the second capillary heat exchange component 20 is connected to the water outlet pipe 25; the lower end of the first capillary heat exchange component 19 and the lower end of the second capillary heat exchange component 20 are connected by means of a water collecting tank 23.

[0059] When storing heat, the heat carrier in the water inlet pipe 24 first enters the first capillary heat exchange component 19, and the high-temperature heat carrier first exchanges heat with the salt columns in the first heat storage chamber 21 and the salt columns in the second heat storage chamber 22 in the first capillary heat exchange component 19; after heat exchange, it enters the water collecting tank 23, and then enters the second capillary heat exchange component 20 with the help of water pressure, and exchanges heat with the salt columns in the second heat storage chamber 22 in the second capillary heat exchange component 20.

[0060] When releasing heat, the low-temperature heat carrier in the water inlet pipe 24 enters the first capillary heat exchange component 19, and exchanges heat with the salt column in the first heat storage chamber 21 and the salt column in the second heat storage chamber 22; after heating, it first enters the water collecting tank 23, is mixed in the water collecting tank 23, and is pressed into the second capillary heat exchange component 20, and undergoes secondary heat exchange with the salt column in the second heat storage chamber 22 to achieve the purpose of heating.

[0061] Optionally, the water collecting box 23 is annular, the inner diameter of the annular water collecting box 23 is consistent with the inner diameter of the first capillary heat exchange component 19 , and the outer diameter of the annular water collecting box is consistent with the outer diameter of the second capillary heat exchange component 20 .

[0062] In some possible embodiments, see Figure 6 and Figure 7 The capillary heat exchange component includes a shell and a flow guide member located in the shell. The inner cavity of the shell forms a plurality of annular flow channels 31 arranged at intervals by means of the flow guide member. A plurality of auxiliary flow channels 32 are arranged between two adjacent annular flow channels 31. The auxiliary flow channels 32 are arranged at an angle to the axial direction of the shell.

[0063] Specifically, the capillary heat exchange component includes an outer shell and a flow guide member located inside the outer shell, the flow guide member is used to separate the inner cavity of the outer shell into a plurality of water flow channels, the water flow channels include longitudinally spaced annular flow channels 31 and auxiliary flow channels 32 connecting two adjacent annular flow channels 31, and there are a plurality of auxiliary flow channels 32 between each two adjacent water flow channels, and the angle between the auxiliary flow channel 32 and the annular flow channel 31 is an acute angle.

[0064] Optionally, the auxiliary flow channel 32 may be wavy in shape.

[0065] In some possible embodiments, see Figure 7The guide member is an isosceles triangle, the auxiliary flow channel 32 is located on both sides of the isosceles triangle, the auxiliary flow channel 32 includes a first flow channel and a second flow channel respectively located on both sides of the guide member, the first flow channel and the second flow channel are both located between two adjacent annular flow channels 31, and the upper ends or lower ends of the first flow channel and the second flow channel are connected.

[0066] Specifically, the guide member includes a first guide member 29 and a second guide member 30, wherein the first guide member 29 is a positive isosceles triangle, and the second guide member 30 is an inverted isosceles triangle. There is a circle of first guide members 29 and a circle of second guide members 30 between two adjacent annular flow channels 31, and the first guide member 29 is below the second guide member 30. The first guide member 29 and the second guide member 30 are arranged alternately, and the two adjacent first guide members 29 are arranged at intervals, and the two adjacent second guide members 30 are arranged at intervals. The first flow channel and the second flow channel are formed with two different second guide members 30 on both sides of the first flow guide member 29, respectively, and the upper ends of the first flow channel and the second flow channel are connected and connected to the annular flow channel 31 of the upper layer; the lower ends of the first flow channel and the second flow channel are connected and connected to the annular flow channel 31 of the lower layer.

[0067] Optionally, an included angle between the first flow channel, the second flow channel and the annular flow channel 31 is greater than 30 degrees and less than 60 degrees.

[0068] In some possible embodiments, see Figure 5 and Figure 6 The upper ends of the first capillary heat exchange component 19 and the second capillary heat exchange component 20 are connected by means of a plurality of connecting pipes 26, and the connecting pipes 26 are arranged along the radial direction of the first capillary heat exchange component 19; the upper end of the second capillary heat exchange component 20 is connected to the water inlet pipe 24, and the lower end of the second capillary heat exchange component 20 is connected to the water outlet pipe 25.

[0069] The first capillary heat exchange component 19 and the second capillary heat exchange component 20 are both annular, and the first capillary heat exchange component 19 and the second capillary heat exchange component 20 are spaced apart. One end of the connecting tube 26 is connected to the upper part of the inner cavity of the first capillary heat exchange component 19, and the other end is connected to the upper part of the inner cavity of the second capillary heat exchange component 20.

[0070] During heat storage, the heat carrier medium in the water inlet pipe 24 is restricted to enter the second capillary heat exchange component 20, mainly to exchange heat with the salt column in the second heat storage chamber 22, until the salt column in the second heat storage chamber 22 is heated up, and then the salt column in the first heat storage chamber 21 is heated up.

[0071] When releasing heat, heat is first exchanged with the salt column in the second heat storage chamber 22.

[0072] Optionally, the connecting pipe 26 is horizontally arranged, and there are multiple connecting pipes 26 , which are evenly distributed in the circumference of the first capillary heat exchange component 19 along the radial direction of the shell 17 .

[0073] Optionally, an annular water storage chamber 27 is provided at the upper end of the first capillary heat exchange component 19 and the second capillary heat exchange component 20, and a plurality of water holes 28 communicating with the annular flow channel 31 are provided at the lower end of the water storage chamber 27. When the flow rate of the water inlet pipe 24 is greater than the flow rate of the water holes 28 of the second capillary heat exchange component 20, a part of the heat-carrying medium entering the second capillary heat exchange component 20 enters the annular flow channel 31 of the second capillary heat exchange component 20 through the above-mentioned water holes 28, and the other part enters the water storage chamber 27 in the first capillary heat exchange component 19 through the connecting pipe 26.

[0074] In some possible embodiments, see Figure 8 and Fig. 9 The first capillary heat exchange component 19 has a first support frame 33 with a circular cross-section on the inner side, and a plurality of first limiting holes 34 for limiting the salt column are evenly distributed on the first support frame 33; a second support frame 35 is provided between the first capillary heat exchange component 19 and the second capillary heat exchange component 20, and a plurality of connecting holes for clamping the salt column are opened on the second support frame 35.

[0075] Specifically, the inner side of the first capillary heat exchange component 19 is a circular first heat storage chamber 21, and a first support frame 33 is provided in the first heat storage chamber 21, and a plurality of first limiting holes 34 are provided on the first support frame 33; an annular second heat storage chamber 22 is provided between the first capillary heat exchange component 19 and the second capillary heat exchange component 20, and a second support frame 35 is provided in the second heat storage chamber 22, and a plurality of second limiting holes 36 are provided on the second support frame 35; the salt column is longitudinally arranged in the first heat storage chamber 21 or the second heat storage chamber 22 under the limitation of the first limiting holes 34 and the second limiting holes 36.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Phase change heat storage and air source heat pump combined heating system, characterized in that: include: Air source heat pump, phase change heat storage device, auxiliary instant heating device, heating water collector, tail water collector; the air source heat pump is connected with a first water supply pipeline and a first return water pipeline; the phase change heat storage device is connected with a second water supply pipeline and a second return water pipeline; the auxiliary instant heating device is connected with a third water supply pipeline and a third return water pipeline; the first water supply pipeline, the second water supply pipeline and the third water supply pipeline are all connected to the heating water collector, and the first return water pipeline, the second return water pipeline and the third return water pipeline are all connected to the tail water collector; the third water supply pipeline is provided with a first instant heating auxiliary pipeline and a second instant heating auxiliary pipeline, the first instant heating auxiliary pipeline is connected and the second instant heating auxiliary pipeline is connected to the first return water pipeline and the second return water pipeline respectively; a first heat storage pipeline is connected between the first water supply pipeline and the second return water pipeline, and a second heat storage pipeline is connected between the second water supply pipeline and the first return water pipeline; The phase change heat storage device comprises: A shell, wherein a water inlet pipe and a water outlet pipe are arranged on the shell; and a plurality of salt columns are arranged in the shell; A capillary heat exchange component, wherein the capillary heat exchange component is attached to one side of the salt column, and wherein a water flow channel is provided in the capillary heat exchange component, and both ends of the water flow channel are respectively connected to the water inlet pipe and the water outlet pipe; The capillary heat exchange component comprises a shell and a flow guide member located in the shell, the inner cavity of the shell forms a plurality of annular flow channels arranged at intervals by means of the flow guide member, a plurality of auxiliary flow channels are arranged between two adjacent annular flow channels, and the auxiliary flow channels are arranged at an angle with the axial direction of the shell; The guide member is an isosceles triangle, the auxiliary flow channel is located on both sides of the isosceles triangle, the auxiliary flow channel includes a first flow channel and a second flow channel respectively located on both sides of the guide member, the first flow channel and the second flow channel are both located between two adjacent annular flow channels, and the upper ends or lower ends of the first flow channel and the second flow channel are connected.

2. The phase change heat storage and air source heat pump combined heating system according to claim 1, characterized in that: The third water supply pipeline and the third water return pipeline are connected to the phase change heat storage device via a heat exchanger.

3. The phase change heat storage and air source heat pump combined heating system according to claim 1, characterized in that: The capillary heat exchange component is annular, and there are multiple capillary heat exchange components. The multiple capillary heat exchange components are sequentially spaced and nested, and the multiple capillary heat exchange components surround a plurality of heat storage chambers for accommodating the salt columns.

4. The phase change heat storage and air source heat pump combined heating system according to claim 3, characterized in that: The capillary heat exchange component includes a first capillary heat exchange component and a second capillary heat exchange component, the second capillary heat exchange component is sleeved on the outside of the first capillary heat exchange component, and the second capillary heat exchange component is coaxial with the first capillary heat exchange component and is arranged at intervals; the upper ends of the first capillary heat exchange component and the second capillary heat exchange component are connected to the water inlet pipe, and the lower ends of the first capillary heat exchange component and the second capillary heat exchange component are connected to the water outlet pipe.

5. The phase change heat storage and air source heat pump combined heating system according to claim 4, characterized in that: The bottom of the shell is provided with a water collecting tank, which is circular or annular; the water collecting tank is connected to the lower ends of the first capillary heat exchange component and the second capillary heat exchange component; the upper end of the first capillary heat exchange component is connected to the water inlet pipe; the upper end of the second capillary heat exchange component is connected to the water outlet pipe.

6. The phase change heat storage and air source heat pump combined heating system according to claim 4, characterized in that: The upper ends of the first capillary heat exchange component and the second capillary heat exchange component are connected by means of a plurality of connecting pipes, and the connecting pipes are arranged along the radial direction of the first capillary heat exchange component; the upper end of the second capillary heat exchange component is connected to the water inlet pipe, and the lower end of the second capillary heat exchange component is connected to the water outlet pipe.

7. The phase change heat storage and air source heat pump combined heating system according to claim 6, characterized in that: The first capillary heat exchange component has a first support frame with a circular cross-section on the inner side, and a plurality of first limiting holes for limiting the salt column are evenly distributed on the first support frame; a second support frame is provided between the first capillary heat exchange component and the second capillary heat exchange component, and a plurality of second limiting holes for limiting the salt column are evenly distributed on the second support frame.

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