阅读说明：本技术 双源多温位相变式储放热一体化供热装置及其方法 (Double-source multi-temperature phase-change heat storage and release integrated heating device and method thereof ) 是由 丁小江 施永康 杨庆成 招就权 孙军 汤志均 于 2021-07-20 设计创作，主要内容包括：本发明公开了一种双源多温位相变式储放热一体化供热装置及其方法,包括太阳能集热装置、空气源热泵装置；还包括有供水仓；还包括有相变储热模块；所述太阳能集热装置具有入水口和出水口,所述太阳能集热装置的入水口连接有第三管路,所述太阳能集热装置的出水口连接有第四管路、第五管路,所述第四管路与所述供水仓连接,所述第五管路与所述相变储热模块连接；所述空气源热泵装置包括有冷凝换热器,所述冷凝换热器与所述供水仓、所述相变储热模块连接；通过采用太阳能集热装置、空气源热泵装置双热源与供水仓、相变储热模块相配合的设计,解决在阴天或者“峰值”电价无法高效储热问题,实现多热源调配对相变材料进行储热。(The invention discloses a double-source multi-temperature phase-change heat storage and release integrated heating device and a method thereof, wherein the device comprises a solar heat collection device and an air source heat pump device; also comprises a water supply bin; the heat storage device also comprises a phase change heat storage module; the solar heat collection device is provided with a water inlet and a water outlet, the water inlet of the solar heat collection device is connected with a third pipeline, the water outlet of the solar heat collection device is connected with a fourth pipeline and a fifth pipeline, the fourth pipeline is connected with the water supply bin, and the fifth pipeline is connected with the phase-change heat storage module; the air source heat pump device comprises a condensation heat exchanger, and the condensation heat exchanger is connected with the water supply bin and the phase change heat storage module; by adopting the design that the solar heat collection device and the air source heat pump device are matched with the water supply bin and the phase change heat storage module, the problem that the heat cannot be efficiently stored on cloudy days or at peak electricity prices is solved, and the heat storage of the phase change material by multiple heat source adjustment pairs is realized.)

1. The utility model provides a dual source multi-temperature phase change formula stores hot integration heating device, includes solar heat collection device (100), air source heat pump device (200), its characterized in that:

also comprises a water supply bin (300);

the phase-change heat storage device further comprises a phase-change heat storage module (400), wherein the phase-change heat storage module (400) comprises a phase-change material;

the solar heat collection device (100) is provided with a water inlet and a water outlet, the water inlet of the solar heat collection device (100) is connected with a third pipeline (110), the water outlet of the solar heat collection device (100) is connected with a fourth pipeline (120) and a fifth pipeline (130), the fourth pipeline (120) is connected with the water supply bin (300), and the fifth pipeline (130) is connected with the phase-change heat storage module (400);

the air source heat pump device (200) comprises a condensation heat exchanger (210), wherein the condensation heat exchanger (210) is connected with the water supply bin (300) and the phase change heat storage module (400).

2. The dual-source multi-temperature phase-change heat storage and release integrated heating device according to claim 1, characterized in that: the water supply device also comprises a water supply pipeline (500), and the water supply pipeline (500) is connected with the third pipeline (110).

3. The dual-source multi-temperature phase-change heat storage and release integrated heating device according to claim 2, characterized in that: the water supply pipeline (500) is connected with the phase-change heat storage module (400) through a first pipeline (510), and the water supply bin (300) is connected with the phase-change heat storage module (400) through a sixth pipeline (310).

4. The dual-source multi-temperature phase-change heat storage and release integrated heating device according to claim 2, characterized in that: the water supply pipeline (500) is connected with the water supply bin (300) through a second pipeline (520).

5. The dual-source multi-temperature phase-change heat storage and release integrated heating device according to claim 2, characterized in that: the fifth pipeline (130) is provided with a one-way valve (131), the fifth pipeline (130) is connected with the water supply pipeline (500) and the water outlet of the solar heat collection device (100), and the one-way valve (131) is used for guiding water in the fifth pipeline (130) to flow from the phase change heat storage module (400) to the water supply pipeline (500) and the solar heat collection device (100).

6. The dual-source multi-temperature phase-change heat storage and release integrated heating device according to claim 1, characterized in that: the phase-change heat storage module (400) comprises a first heat storage layer (410) and a second heat storage layer (420).

7. The dual-source multi-temperature phase-change heat storage and release integrated heating device according to claim 1, characterized in that: the phase-change materials of the phase-change heat storage module (400) are stacked in the order that the higher the phase-change temperature is, the higher the placement position is.

8. The dual-source multi-temperature phase-change heat storage and release integrated heating device according to claim 1, characterized in that: and heat insulation materials are arranged on the water supply bin (300) and the phase change heat storage module (400).

9. The dual-source multi-temperature phase-change heat storage and release integrated heating device according to claim 1, characterized in that: the condensing heat exchanger (210) comprises a plurality of calandria (211), each calandria (211) is provided with a sixth control valve (212), and the sixth control valve (212) is used for controlling the opening and closing of the calandria (211).

10. A dual-source multi-temperature phase-change heat storage and release integrated heat supply method, which is characterized in that the dual-source multi-temperature phase-change heat storage and release integrated heat supply device according to any one of claims 1 to 9 is adopted, and the steps comprise:

when in a sunny day of the day,

A1. cold water is injected into the solar heat collection device (100), and the solar heat collection device (100) heats the cold water;

A2. hot water heated by the solar heat collection device (100) enters the water supply bin (300) through the fourth pipeline (120);

A3. when hot water in the water supply bin (300) is full, hot water in the solar heat collection device (100) enters the phase-change heat storage module (400) through the fifth pipeline (130), and the phase-change heat storage module (400) absorbs the heat of the hot water in the fifth pipeline (130) to store heat;

when the solar energy storage device is in a valley electricity period at night or in a day with insufficient sunlight and the phase change heat storage module (400) stores enough heat,

B1. cold water is injected into the phase-change heat storage module (400) to heat the cold water;

B2. hot water heated by the phase-change heat storage module (400) enters the water supply bin (300);

when the solar energy storage device is in a valley electricity period at night or in a day with insufficient sunlight and the phase change heat storage module (400) is insufficient in heat storage,

C1. cold water passes through the phase-change heat storage module (400) and then is injected into the water supply bin (300);

C2. the air source heat pump device (200) heats the hot water of the phase change heat storage module (400) and the water supply bin (300) through a condensation heat exchanger (210).

Technical Field

The invention relates to the technical field of heat supply, in particular to a double-source multi-temperature phase-change heat storage and release integrated heat supply device.

Background

With the increasing problem of environmental pollution, the utilization of solar energy resources draws attention of people. However, solar energy resources have natural drawbacks of periodicity, intermittency and instability, and at the same time, there is a mismatch in time and space and demand time. The air source heat pump device is also an energy-saving technology, has wide application range in China, can be coupled with solar energy, and further realizes the efficient utilization of energy.

The phase-change material is used as a main material for storing/releasing solar energy and condensation heat of a heat pump, no matter a heating device based on a solar energy or air source heat pump. However, the phase change material does not change in temperature during the phase change process and can store a large amount of latent heat, and at present, the phase change material is mainly combined with a solar heating system or an electric heating system. The phase-change material and the solar heating system are easily coupled and cannot be used in continuous rainy days, the phase-change material and the electric heating system are coupled and easily cause peak power utilization in daytime, and the coupling system is too large and causes high cost.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a double-source multi-temperature phase-change heat storage and release integrated heat supply device, which is used as an air energy-solar energy double-source based multi-temperature phase-change heat storage/release integrated temperature control heat supply system, can solve the problem that the electricity price can not be efficiently stored in cloudy days or peak values, realizes heat storage of phase-change materials by multi-heat source regulation, and simultaneously makes the heat storage device into an integrated device to reduce the occupied area.

The technical scheme adopted by the invention for solving the technical problems is as follows: the double-source multi-temperature phase-change heat storage and storage integrated heating device comprises a solar heat collection device and an air source heat pump device; also comprises a water supply bin; the phase-change heat storage module comprises a phase-change material; the solar heat collection device is provided with a water inlet and a water outlet, the water inlet of the solar heat collection device is connected with a third pipeline, the water outlet of the solar heat collection device is connected with a fourth pipeline and a fifth pipeline, the fourth pipeline is connected with the water supply bin, and the fifth pipeline is connected with the phase-change heat storage module; the air source heat pump device comprises a condensation heat exchanger, and the condensation heat exchanger is connected with the water supply bin and the phase change heat storage module.

According to the double-source multi-temperature phase-change heat storage and release integrated heating device provided by the invention, the problem that the electricity price cannot be efficiently stored in cloudy days or at the peak value is solved by adopting the design that the double heat sources of the solar heat collection device and the air source heat pump device are matched with the water supply bin and the phase-change heat storage module, the phase-change material is subjected to heat storage by adjusting multiple heat sources, and meanwhile, the occupied area can be reduced by the integrated design.

As some preferable embodiments of the present invention, a water supply pipeline is further included, and the water supply pipeline is connected to the third pipeline.

As some preferred embodiments of the present invention, the water supply pipeline is connected to the phase change heat storage module through a first pipeline, and the water supply bin is connected to the phase change heat storage module through a sixth pipeline.

As some preferred embodiments of the present invention, the water supply pipeline is connected with the water supply bin through a second pipeline.

As some preferred embodiments of the present invention, a check valve is disposed on the fifth pipeline, the fifth pipeline is connected to the water supply pipeline and the water outlet of the solar heat collection device, and the check valve is configured to guide water in the fifth pipeline to flow from the phase change heat storage module to the water supply pipeline and the solar heat collection device.

In some preferred embodiments of the present invention, the phase change heat storage module includes a first heat storage layer and a second heat storage layer.

As some preferred embodiments of the present invention, the phase change materials of the phase change heat storage modules are stacked in order of higher phase change temperature and higher placement position.

As some preferred embodiments of the present invention, heat insulating materials are disposed on the water supply bin and the phase change heat storage module.

As some preferred embodiments of the present invention, the condensing heat exchanger includes a plurality of rows of tubes, each row of tubes is provided with a sixth control valve, and the sixth control valve is used for controlling the opening and closing of the row of tubes.

A double-source multi-temperature phase-change type heat storage and release integrated heat supply method adopts the double-source multi-temperature phase-change type heat storage and release integrated heat supply device, and comprises the following steps:

when in a sunny day of the day,

A1. cold water is injected into the solar heat collection device, and the solar heat collection device heats the cold water;

A2. hot water heated by the solar heat collection device enters the water supply bin through a fourth pipeline;

A3. when hot water in the water supply bin is full, hot water in the solar heat collection device enters a phase change heat storage module through a fifth pipeline, and the phase change heat storage module absorbs the heat of the hot water in the fifth pipeline to store heat;

when the solar energy storage device is in a valley electricity period at night or in a day with insufficient sunlight and the phase change heat storage module stores enough heat,

B1. cold water is injected into the phase change heat storage module to heat the cold water;

B2. hot water heated by the phase-change heat storage module enters the water supply bin;

when the solar energy storage device is in a valley electricity period at night or in a day with insufficient sunlight and the phase change heat storage module stores insufficient heat,

C1. cold water passes through the phase-change heat storage module and then is injected into the water supply bin;

C2. the air source heat pump device heats hot water of the phase change heat storage module and the water supply bin through the condensation heat exchanger.

According to the double-source multi-temperature phase-change heat storage and release integrated heat supply method provided by the invention, the problem that the electricity price cannot be efficiently stored in cloudy days or at the peak value is solved by adopting the design that the double heat sources of the solar heat collection device and the air source heat pump device are matched with the water supply bin and the phase-change heat storage module, and the phase-change material is subjected to heat storage by multi-heat source adjustment.

The invention has the beneficial effects that:

1. the solar energy is utilized to the maximum extent, the solar heating is taken as the main point, the phase-change material heat storage technology of the phase-change heat storage module is utilized, and the air source heat pump device is used for assisting in heating in the valley electricity period, so that the system is flexible to work, and various heat supply modes and heat storage modes are realized;

2. the invention couples two heat sources of air energy and solar energy, and simultaneously forms an integrated device with the water supply bin and the phase change heat storage module, thereby reducing the occupied area;

3. the phase-change material is molded and packaged in different packaging shapes, the packaged phase-change material is stacked in the phase-change heat storage module in a regular or irregular form, multi-temperature-position gradual water heating is realized through the phase-change material with different phase-change temperatures, and the heat release temperature can be controlled through the flow rate of the submerged phase-change material;

4. the condensing heat exchanger can adopt various placing forms, and can open and close the condensing pipe through the control valve, and the heat charging and discharging rate of the water supply bin and the phase-change material can be regulated and controlled by the number of pipe passes of working medium flowing in the condensing heat exchanger.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the system architecture of the present invention;

FIG. 2 is a schematic diagram of the system configuration of the air-source heat pump apparatus of the present invention;

FIG. 3 is a front view of a first thermal storage layer in an embodiment of the invention;

fig. 4 is a C-C cross sectional view of a first thermal storage layer in an embodiment of the present invention;

fig. 5 is a cross-sectional view taken along line D-D of a first thermal storage layer in an embodiment of the invention;

FIG. 6 is a front view of a water supply sump in an embodiment of the present invention;

fig. 7 is a front view a-a of a water supply sump in an embodiment of the present invention.

Reference numerals:

a solar heat collection device 100, a third pipeline 110, a third control valve 111, a fourth pipeline 120, a fourth control valve 121, a fifth pipeline 130, a check valve 131, a fifth control valve 132, a fifth pipeline inlet 133 and a fifth pipeline outlet 134; the air source heat pump device 200, the condensing heat exchanger 210, the calandria 211, the sixth control valve 212, the compressor 220, the evaporator 230 and the throttling device 240; a water supply sump 300, a sixth pipeline 310; the phase-change heat storage module 400, the first heat storage layer 410, the second heat storage layer 420, the condensation heat exchanger inlet 213 and the condensation heat exchanger outlet 214; a water supply pipeline 500, a water supply pump 501, a first pipeline 510, a first control valve 511, a second pipeline 520, and a second control valve 521; an insulating layer 600; heating end 700, seventh conduit 710.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the invention can be practiced without these specific details, i.e., those skilled in the art can more effectively introduce the essential nature of their work to others skilled in the art using the description and presentation herein.

It should be further noted that the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component, and that simple, non-inventive adjustments to such directions by those skilled in the art should not be construed as techniques outside the scope of the present application.

If the description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of indicated technical features or to implicitly indicate the precedence of the indicated technical features.

It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. Well-known manufacturing methods, control procedures, component dimensions, material compositions, pipe arrangements, etc., have not been described in detail since they are readily understood by those of ordinary skill in the art, in order to avoid obscuring the present invention.

Fig. 1 is a schematic structural diagram of a system according to an embodiment of the present invention, and referring to fig. 1, an embodiment of the present invention provides a dual-source multi-temperature phase-change heat storage and storage integrated heating apparatus, including a solar heat collection apparatus 100 and an air source heat pump apparatus 200.

Further, the heating apparatus further includes a water supply bin 300 for storing cold water or hot water.

Still further, the heat supply device further comprises a phase change heat storage module 400, wherein the phase change heat storage module 400 comprises a phase change material.

Still further, the solar heat collection device 100 has a water inlet and a water outlet, the water inlet of the solar heat collection device 100 is connected to the third pipeline 110, the water outlet of the solar heat collection device 100 is connected to the fourth pipeline 120 and the fifth pipeline 130, the fourth pipeline 120 is connected to the water supply bin 300, and the fifth pipeline 130 is connected to the phase change heat storage module 400.

Still further, the air source heat pump device 200 includes a condensing heat exchanger 210, and the condensing heat exchanger 210 is connected to the water supply bin 300 and the phase change heat storage module 400.

The above-mentioned dual-source multi-temperature phase-change storage and heat-storage integrated heating apparatus is only a preferred embodiment of the present invention, and is only used for illustrating the technical solution of the present invention, not for limiting the same. It will be understood by those skilled in the art that the foregoing technical solutions may be modified or supplemented by the prior art, or some of the technical features may be replaced by equivalents; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

A double-source multi-temperature phase-change type heat storage and release integrated heat supply method adopts the double-source multi-temperature phase-change type heat storage and release integrated heat supply device, and comprises the following steps:

when in a sunny day of the day,

A1. cold water is injected into the solar heat collection device 100, and the solar heat collection device 100 heats the cold water;

A2. the hot water heated by the solar heat collection device 100 enters the water supply bin 300 through the fourth pipeline 120;

A3. when the hot water in the water supply bin 300 is full, the hot water in the solar heat collection device 100 enters the phase-change heat storage module 400 through the fifth pipeline 130, and the phase-change heat storage module 400 absorbs the heat of the hot water in the fifth pipeline 130 to store heat;

when the solar energy storage device is in a valley electricity period at night or in a day with insufficient sunlight, and the phase change heat storage module 400 stores enough heat,

B1. cold water is injected into the phase change heat storage module 400 to heat the cold water;

B2. hot water heated by the phase change heat storage module 400 enters the water supply bin 300;

when the solar energy is in the off-peak electricity period at night or in the day with insufficient sunlight, and the phase change heat storage module 400 is insufficient in heat storage,

C1. cold water passes through the phase-change heat storage module 400 and then is injected into the water supply bin 300;

C2. the air source heat pump device 200 heats the hot water in the phase change heat storage module 400 and the water supply bin 300 through the condensing heat exchanger 210.

The above-mentioned dual-source multi-temperature phase-change heat storage and release integrated heat supply method is only a preferred embodiment of the present invention, and is only used for illustrating the technical solution of the present invention, not for limiting the same. It will be understood by those skilled in the art that the foregoing technical solutions may be modified or supplemented by the prior art, or some of the technical features may be replaced by equivalents; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Reference will now be made in detail to some embodiments, wherein "an embodiment" is referred to herein as a particular feature, structure, or characteristic that may be included in at least one implementation of the present application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Furthermore, the details representative of one or more embodiments are not necessarily indicative of any particular order, nor are they intended to be limiting.

In some embodiments, a fourth control valve 121 is disposed on the fourth line 120 as its control valve.

In some embodiments, when the temperature of the water supply to the solar thermal collection device 100 is lower thanIn the meantime, the fourth control valve 121 is closed to stop supplying water to the water supply bin 300, thereby preventing the temperature of the hot water in the water supply bin 300 from being too low.

In some embodiments, the heating apparatus further comprises a water supply pipeline 500, and the water supply pipeline 500 is connected to the third pipeline 110.

In this embodiment, optionally, a third control valve 111 is disposed on the third pipeline 110 as a control valve thereof.

In some embodiments, the water supply pipeline 500 is connected to the phase-change heat storage module 400 through a first pipeline 510, and the water supply bin 300 is connected to the phase-change heat storage module 400 through a sixth pipeline 310.

In this embodiment, optionally, a first control valve 511 is disposed on the first pipeline 510 as a control valve thereof.

In this embodiment, optionally, the first control valve 511 is a control valve capable of controlling the water flow, so as to adjust the flow rate of the phase-change material in the phase-change heat storage module 400 submerged by cold water, thereby controlling the heat release speed.

In some embodiments, the water supply conduit 500 is connected to the water supply cartridge 300 by a second conduit 520.

In this embodiment, optionally, a second control valve 521 is disposed on the second pipeline 520 as a control valve thereof.

In some embodiments, referring to fig. 3, 4 and 5, after the fifth pipeline 130 is divided into a plurality of branch pipelines and the fifth pipeline inlet 133, the heat of the hot water in the fifth pipeline 130 can be sufficiently transferred to the phase change material with high phase change temperature in the first thermal storage layer 410, and finally, the plurality of branch pipelines exit from the fifth pipeline outlet 134 and are collected into one pipeline. The first heat storage layer 410 is formed by splicing a plurality of heat exchangers, wherein working media in the plurality of heat exchangers enter from an inlet 213 of a condensing heat exchanger, heat in the condensing heat exchanger 210 can be fully transferred to a high phase change temperature phase change material in the first heat storage layer 410, then the working media in the heat exchangers go to a throttling device 240 from an outlet 214 of the condensing heat exchanger, according to the heat storage requirement, the opening and closing of the plurality of condensing heat exchange pipes are controlled by a sixth control valve group formed by a sixth control valve 212, when rapid heat charging is needed, the number of opened valves can be increased by adjusting the sixth control valve group, and the heat brought by the condensing heat exchanger 210 is increased; when it is desired to slow down the heat-charging rate, the number of the opened sixth control valves 212 can be reduced by adjusting the sixth control valve set, and the amount of heat brought by the condensing heat exchanger 210 is reduced.

In some embodiments, a fifth control valve 132 is disposed on the fifth conduit 130 as its control valve.

In some embodiments, a check valve 131 is disposed on the fifth pipeline 130, the fifth pipeline 130 is connected to the water supply pipeline 500 and the water outlet of the solar energy collection device 100, and the check valve 131 is used for guiding the water in the fifth pipeline 130 to flow from the phase change heat storage module 400 to the water supply pipeline 500 and the solar energy collection device 100.

In some embodiments, the air-source heat pump apparatus 200 includes a compressor 220, an evaporator 230, and a throttle 240.

In some embodiments, referring to fig. 2, the phase-change heat storage module 400 includes a first heat storage layer 410 and a second heat storage layer 420, where phase-change materials with different phase-change temperature points are respectively disposed, so as to gradually heat water at multiple temperature points, and simultaneously, the heat release temperature can be controlled by flooding water at a flow rate without different phase-change materials, so as to flexibly adjust the temperature. The phase-change material with higher phase-change temperature is disposed in the first thermal storage layer 410, and the phase-change material with lower phase-change temperature is disposed in the second thermal storage layer 420.

In some embodiments, the phase change materials of the phase change heat storage modules 400 are stacked in order of higher phase change temperature and higher placement position.

In this embodiment, the phase change materials in the first thermal storage layer 410 and/or the second thermal storage layer 420 are optionally stacked in the order of higher phase change temperature and higher placement position.

In this embodiment, the phase change material in the first thermal storage layer 410 and/or the second thermal storage layer 420 may be stacked regularly or irregularly.

In some embodiments, the heat insulating materials are disposed on the water supply bin 300 and the phase change heat storage module 400, so that an integrated heat insulating effect is achieved, space is saved, the heat insulating effect is improved, and the efficiency of the heat supply device is further ensured.

In this embodiment, optionally, the heat insulating material covers the water supply bin 300 and the phase change heat storage module 400 to form the heat insulating layer 600.

In some embodiments, referring to fig. 6 and 7, the condensing heat exchanger 210 includes a plurality of rows of tubes 211, each row of tubes 211 is provided with a sixth control valve 212, and the sixth control valve 212 is configured to control opening and closing of the row of tubes 211, so as to control the number of tube passes of the row of tubes 211 through which the working medium flows, so as to regulate and control the heat charging rate of the phase change material of the water supply bin 300 and the phase change heat storage module 400.

In some embodiments, the water supply bin 300 is connected to the heating terminal 700 through a seventh pipe 710, i.e., the heating apparatus is heated (warm water or warm air) by the heating terminal 700.

In some embodiments, taking control of the control valve as an example, the specific implementation process is as follows:

when the sunlight is sufficient in the daytime, the first control valve 511, the second control valve 521 and the fifth control valve 132 are closed, the third control valve 111 is opened, the water supply pump 501 sends the cold water in the water supply pipeline 500 to the third pipeline 110, the cold water enters the solar heat collection device 100, and the cold water absorbs the heat radiated by the solar light and enters the water supply bin 300 through the fourth pipeline 120. Meanwhile, when the hot water in the water supply bin 300 is full, the fifth control valve 132 is opened, the hot water in the solar heat collection device 100 enters the phase change heat storage module 400 through the fifth pipeline 130, the phase change material is melted by phase change, and the hot water in the fifth pipeline 130 is absorbed by heat for heat storage. After the hot water in the fifth pipeline 130 brings the heat to the phase change heat storage module 400, the water temperature of the fifth pipeline 130 is lowered and is connected with the water supply pipeline 500, and the water is sent back to the water supply pipeline 500, so that the water temperature of the water supply pipeline 500 is increased.

When the water supply bin 300 is in a valley electricity period at night or in a day with insufficient sunlight, the second control valve 521, the third control valve 111 and the fourth control valve 121 are closed, the first control valve 511 is opened, the water supply pump 501 sends cold water in the water supply pipeline 500 to the first pipeline 510, the cold water submerges the phase change material from the first pipeline 510, the phase change material undergoes phase change solidification to release heat, the cold water takes away the heat and enters the water supply bin 300 through the sixth pipeline 310, and the heat in the water supply bin 300 can be sent to the heating end 700 through the seventh pipeline 710. Meanwhile, the flow rate of the cold water in the first pipe 510 can be controlled by the first control valve 511, so that the speed of the phase change material submerged by the cold water is controlled, and the heat release temperature is controlled. After entering from the first pipeline 510, the cold water passes through the low phase-change temperature phase-change material in the second heat storage layer 420 and then passes through the high phase-change temperature phase-change material in the first heat storage layer 410, so that multiple temperature levels are realized, and the cold water is heated in a stepped manner.

When the solar water heater is in the off-peak electricity period at night, if sunlight is insufficient on the day, the heat storage amount of the phase change heat storage module 400 is insufficient, and when hot water in the water supply bin 300 is insufficient, the air source heat pump device 200 starts to work. At this time, the first control valve 511 and the third control valve 111 are closed, the second control valve 521 is opened, the water supply pump 501 sends the cold water in the water supply pipeline 500 to the water supply bin 300, and the cold water takes away a part of heat of the condensing heat exchanger 210 to become hot water. Meanwhile, the condensing heat exchanger 210 passes through the phase change heat storage module 400 to heat the phase change material with high phase change temperature in the first heat storage layer 410 and the phase change material with low phase change temperature in the second heat storage layer 420, so that the two types of phase change materials are phase-changed and melted to store heat.

The present invention can be modified and adapted appropriately from the above-described embodiments, according to the principles described above. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention.