Solar heat storage and supply system

Abstract

The utility model provides a solar heat storage and supply system. The solar heat storage and supply system comprises a solar heat collector, a heat storage heat exchanger, a heat storage water tank, an auxiliary heat supply device and a large-temperature-difference heat exchange unit. The solar heat collector is connected with one end of the heat storage heat exchanger through a pipeline; the other end of the heat storage heat exchanger is connected with the heat storage water tank through a pipeline; the heat storage water tank is connected with one end of the large-temperature-difference heat exchange unit through a pipeline, and the other end of the large-temperature-difference heat exchange unit is connected with a heating water pipe. And the auxiliary heat supply device is connected between the large-temperature-difference heat exchange unit and the heat storage water tank and on a water inlet pipeline corresponding to the large-temperature-difference heat exchange unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat storage, in particular to a solar heat storage and supply system. BACKGROUND

[0002] With the rapid development of modern society and economy, the demand for energy by human beings is increasing. The reserves of traditional energy such as coal, oil and natural gas are decreasing and becoming increasingly scarce, and the environmental pollution caused by conventional fossil fuels is also becoming more and more serious, which greatly limits the development of society and the improvement of human living quality.

[0003] Solar energy is one of the main renewable energy sources, which is easy to obtain and clean and pollution-free. Solar heat storage and supply across seasons can store and transfer abundant solar energy in non-heating seasons to heating seasons, which is one of the important technical routes of renewable energy for clean heating of buildings, and it collects and stores abundant solar energy in non-heating seasons in the form of heat energy in a cross-season heat storage system for heating in winter.

[0004] At present, the realization of solar heat storage and supply across seasons mainly relies on the coupling use of cross-season pool heat storage solar energy and water source heat pump, which has a large system cost, and the heat storage efficiency and capacity are relatively low, which is easy to cause cold and hot water mixing. CONTENT OF THE INVENTION

[0005] Therefore, the purpose of the present application is to provide a solar heat storage and supply system, which can realize efficient cross-season heat storage and has good heat storage effect.

[0006] In a first aspect, the embodiments of the present application provide a solar heat storage and supply system, which comprises a solar heat collector, a heat storage heat exchanger, a heat storage water tank, an auxiliary heating device and a large-temperature-difference heat exchange unit.

[0007] The solar heat collector is connected to one end of the heat storage heat exchanger through a pipeline;

[0008] The other end of the heat storage heat exchanger is connected to the heat storage water tank through a pipeline;

[0009] The heat storage water tank is connected to one end of the large-temperature-difference heat exchange unit through a pipeline, and the other end of the large-temperature-difference heat exchange unit is connected to a heating water pipe;

[0010] The auxiliary heating device is connected between the large-temperature-difference heat exchange unit and the heat storage water tank, and on the water inlet pipeline corresponding to the large-temperature-difference heat exchange unit.

[0011] In combination with the first aspect, the embodiments of the present application provide a first possible implementation manner of the first aspect, wherein a heat energy transfer loop is formed between the solar heat collector and the heat storage heat exchanger.

[0012] The heat storage water tank and the large-temperature-difference heat exchanger unit form a heating loop.

[0013] The heat storage water tank and the auxiliary heating device form a heat release circulation loop.

[0014] The large-temperature-difference heat exchanger unit and the heating water pipe form a heating loop.

[0015] With reference to the first aspect, a second possible implementation of the first aspect is provided in the embodiments of the present application, and the solar heat storage and heating system further comprises a heat collection circulation pump, a heat storage circulation pump, an auxiliary heating device circulation pump, a heat release circulation pump, and a heating circulation pump.

[0016] The heat collection circulation pump is arranged in the heat energy transmission loop and on the liquid outlet pipeline of the solar heat collector.

[0017] The heat storage circulation pump is arranged in the hot water storage loop and on the water outlet pipeline corresponding to the heat storage water tank.

[0018] The auxiliary heating device circulation pump is arranged in the heat release circulation loop and on the water inlet pipeline corresponding to the auxiliary heating device.

[0019] The heat release circulation pump is arranged in the heat release circulation loop and on the water inlet pipeline corresponding to the large-temperature-difference heat exchanger unit.

[0020] The heating circulation pump is arranged in the heating loop between the heating return water pipe and the large-temperature-difference heat exchanger unit.

[0021] With reference to the first aspect, a third possible implementation of the first aspect is provided in the embodiments of the present application, and the solar heat storage and heating system further comprises a first electric valve, a second electric valve, a third electric valve, and a fourth electric valve.

[0022] The first electric valve is arranged in the hot water storage loop and on the liquid inlet pipeline corresponding to the heat storage heat exchanger.

[0023] The second electric valve is arranged in the heat release circulation loop and on the water inlet pipeline corresponding to the heat storage water tank.

[0024] The third electric valve is arranged in the heat release circulation loop and on the water outlet pipeline corresponding to the heat storage water tank.

[0025] The fourth electric valve is arranged in the heat release circulation loop between the water inlet pipeline and the water outlet pipeline corresponding to the auxiliary heating device, one end of the fourth electric valve is connected to the large-temperature-difference heat exchanger unit, and the other end of the fourth electric valve is connected to the heat storage water tank.

[0026] With reference to the first aspect, the application provides a fourth possible implementation manner of the first aspect. The solar heat storage and supply system further comprises a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, and a fifth temperature sensor.

[0027] The first temperature sensor is arranged on a liquid outlet pipeline corresponding to the solar collector in the heat transfer loop.

[0028] The second temperature sensor is arranged on a water outlet pipeline corresponding to the heat storage water tank in the hot water storage loop.

[0029] The third temperature sensor is arranged on a water outlet pipeline corresponding to the heat storage water tank in the heat release circulation loop.

[0030] The fourth temperature sensor is arranged on a water inlet pipeline corresponding to the large-temperature-difference heat exchanger unit in the heat release circulation loop.

[0031] The fifth temperature sensor is arranged between a heating return water pipeline and the large-temperature-difference heat exchanger unit in the heating loop.

[0032] With reference to the first aspect, the application provides a fifth possible implementation manner of the first aspect. The solar heat storage and supply system further comprises a solar heat collection liquid supplementing constant pressure device.

[0033] The solar heat collection liquid supplementing constant pressure device is connected to the liquid outlet pipeline corresponding to the solar collector in the heat transfer loop.

[0034] With reference to the first aspect, the application provides a sixth possible implementation manner of the first aspect. The solar heat storage and supply system further comprises a heat storage water tank water supplementing constant pressure device.

[0035] The heat storage water tank water supplementing constant pressure device is connected to the water outlet pipeline corresponding to the heat storage water tank in the hot water storage loop.

[0036] With reference to the first aspect, the application provides a seventh possible implementation manner of the first aspect. The solar heat storage and supply system further comprises a heating water supplementing constant pressure device.

[0037] The heating water supplementing constant pressure device is connected to the water inlet pipeline corresponding to the large-temperature-difference heat exchanger unit in the heating loop.

[0038] With reference to the first aspect, the application provides an eighth possible implementation manner of the first aspect. The large-temperature-difference heat exchanger unit comprises a first condenser, a second condenser, a first evaporator, a second evaporator, a first generator, a second generator, a first absorber, a second absorber, a plate heat exchanger, a first bypass pipe, and a second bypass pipe.

[0039] One end of the first condenser is connected to the secondary side water outlet of the plate heat exchanger, and the other end is connected to the heating water supply pipe in the heating water pipe after being combined.

[0040] One end of the first generator is connected to the primary side water inlet of the plate heat exchanger, and the other end is connected to one end of the second generator.

[0041] One end of the first evaporator is connected to the secondary side water outlet of the plate heat exchanger, and the other end is connected to the second evaporator.

[0042] One end of the first absorber is connected to the secondary side water outlet of the plate heat exchanger, and the other end is connected to the heating return pipe in the heating water pipe after being combined.

[0043] The first bypass pipe connects the water supply port of the heat storage water tank and the primary side water inlet of the plate heat exchanger, and the second bypass pipe connects the water return port of the heat storage water tank and the primary side water outlet of the plate heat exchanger.

[0044] The solar energy heat storage and heating system provided by the embodiment of the present application comprises a solar energy heat collector, a heat storage and heat exchanger, a heat storage water tank, an auxiliary heating device and a large-temperature-difference heat exchange unit. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the following will briefly introduce the drawings needed in the embodiment. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0046] Figure 1 Fig. 1 is a structural schematic diagram of a solar energy heat storage and heating system provided by the embodiment of the present application.

[0047] Figure 2 A structure schematic view of a solar energy heat storage and supply system provided by the embodiment of the present application;

[0048] Figure 3 A structure schematic view of a solar energy heat storage and supply system provided by the embodiment of the present application;

[0049] Figure 4 A structure schematic view of a large temperature difference heat exchange unit provided by the embodiment of the present application.

[0050] Icon: 10-solar energy heat collector; 20-heat storage and exchange device; 30-heat storage water tank; 40-assisted heat supply device; 50-large temperature difference heat exchange unit; 61-heat collection circulating pump; 62-heat storage circulating pump; 63-assisted heat supply device circulating pump; 64-heat release circulating pump; 65-heat supply circulating pump; 71-first electric valve; 72-second electric valve; 73-third electric valve; 74-fourth electric valve; 81-first temperature sensor; 82-second temperature sensor; 83-third temperature sensor; 84-fourth temperature sensor; 85-fifth temperature sensor; 91-solar energy heat collection liquid supplementing constant pressure device; 92-heat storage water tank water supplementing constant pressure device; 93-heating water supplementing constant pressure device; 51-first condenser; 52-second condenser; 53-first generator; 54-second generator; 55-first evaporator; 56-second evaporator; 57-first absorber; 58-second absorber; 59-plate heat exchanger; 510-first bypass pipe; 511-second bypass pipe. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0053] It should be noted that like reference numerals and letters refer to like items throughout the drawings, and once an item is defined in one drawing, it is not necessary to further define and explain it in the subsequent drawings.

[0054] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship commonly placed when the utility model product is used, or is the orientation or position relationship commonly understood by the person skilled in the art, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0055] In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0056] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0057] At present, the realization mode of solar cross-season heat storage and heating mainly relies on the coupling use of cross-season pool heat storage solar energy and water source heat pump, which has large system cost, and the heat storage efficiency and heat storage capacity are relatively low, which is easy to cause cold and hot water mixing.

[0058] The embodiment of the application provides a solar heat storage and heating system, which comprises a solar heat collector, a heat storage heat exchanger, a heat storage water tank, an auxiliary heating device and a large-temperature-difference heat exchange unit; the solar heat collector is connected with one end of the heat storage heat exchanger through a pipeline; the other end of the heat storage heat exchanger is connected with the heat storage water tank through a pipeline; the heat storage water tank is connected with one end of the large-temperature-difference heat exchange unit through a pipeline, and the other end of the large-temperature-difference heat exchange unit is connected with a heating water pipe; the auxiliary heating device is connected between the large-temperature-difference heat exchange unit and the heat storage water tank, and is arranged on the water inlet pipeline corresponding to the large-temperature-difference heat exchange unit. Efficient cross-season heat storage and good heat storage effect can be realized.

[0059] Please refer to Figure 1 , Figure 1A structure diagram of a solar heat storage and supply system provided by the embodiment.

[0060] As shown in Figure 1 A solar heat collector 10, a heat storage and heat exchanger 20, a heat storage water tank 30, an auxiliary heating device 40 and a large temperature difference heat exchange unit 50 are provided in the solar heat storage and supply system.

[0061] Specifically, the solar heat collector 10 is connected to one end of the heat storage and heat exchanger 20 through a pipeline; the other end of the heat storage and heat exchanger 20 is connected to the heat storage water tank 30 through a pipeline; the heat storage water tank 30 is connected to one end of the large temperature difference heat exchange unit 50 through a pipeline, and the other end of the large temperature difference heat exchange unit 50 is connected to a heating water pipe; the auxiliary heating device 40 is connected between the large temperature difference heat exchange unit 50 and the heat storage water tank 30, and on the water inlet pipeline corresponding to the large temperature difference heat exchange unit 50.

[0062] Among them, the solar heat collector 10 and the heat storage and heat exchanger 20 form a heat energy transfer loop; the heat storage and heat exchanger 20 and the heat storage water tank 30 form a hot water storage loop; the heat storage water tank 30 forms a heat dissipation circulation loop between the auxiliary heating device 40 and the large temperature difference heat exchange unit 50; the large temperature difference heat exchange unit 50 and the heating water pipe form a heating loop.

[0063] Here, the solar heat collector 10 converts the radiant energy of the sun into heat energy, and uses antifreeze as a medium to transmit heat energy to the heat storage and heat exchanger 20 through a pipeline. The heat storage and heat exchanger 20 transmits the heat energy of the solar heat collector to the heat storage water tank 30 or the large temperature difference heat exchange unit 50 through a pipeline. The hot water after heat exchange by the heat storage and heat exchanger 20 enters the heat storage water tank 30 for storage. When the heating season comes, the hot water at the top of the heat storage water tank 30 enters the large temperature difference heat exchange unit 50 through a pipeline as a heat source. The backwater after heat exchange enters the bottom of the heat storage water tank 30, completing a cycle. The auxiliary heating device 40 converts electrical energy into heat energy, and uses water as a medium to transmit heat energy to the large temperature difference heat exchange unit 50 through a pipeline. The large temperature difference heat exchange unit 50 is in communication with the heat storage water tank 30, and after heat exchange, the heat in the heat storage water tank 30 is transmitted to the user through the heating water pipe through a pipeline.

[0064] Among them, the solar heat collector 10 and the heat storage and heat exchanger 20 use antifreeze as a medium, which can be used normally under low temperature conditions, and can quickly output heat under sunlight. In a low temperature environment, ordinary water will freeze and expand, thereby causing damage to the structural components in the solar heat storage and supply system. Antifreeze can remain in a liquid state at low temperatures, thereby avoiding damage to system components due to freezing. Especially in cold regions, the solar heat collection system using antifreeze as a medium can ensure normal operation in winter. Avoiding pipe freeze cracking during the heating season ensures system safety.

[0065] Optionally, the auxiliary heating device 40 can be an electric boiler or a high-temperature air source heat pump or a gas boiler.

[0066] As a possible implementation, please refer to Figure 2 , Figure 2 A structure diagram of a solar heat storage and supply system provided by the embodiment.

[0067] As shown in Figure 2 , the solar heat storage and supply system provided by the embodiment includes a solar collector 10, a heat storage and heat exchange device 20, a heat storage water tank 30, an auxiliary heating device 40, and a large-temperature-difference heat exchange unit 50. It also includes a heat collection circulating pump 61, a heat storage circulating pump 62, an auxiliary heating device circulating pump 63, a heat release circulating pump 64, and a heating circulating pump 65; a first electric valve 71, a second electric valve 72, a third electric valve 73, and a fourth electric valve 74; a first temperature sensor 81, a second temperature sensor 82, a third temperature sensor 83, a fourth temperature sensor 84, and a fifth temperature sensor 85.

[0068] Specifically, the heat collection circulating pump 61 is arranged in the heat energy transmission loop and is on the liquid outlet pipeline of the solar collector 10; the heat storage circulating pump 62 is arranged in the hot water storage loop and is on the water outlet pipeline corresponding to the heat storage water tank 30; the auxiliary heating device circulating pump 63 is arranged in the heat release circulating loop and is on the water inlet pipeline corresponding to the auxiliary heating device 40; the heat release circulating pump 64 is arranged in the heat release circulating loop and is on the water inlet pipeline corresponding to the large-temperature-difference heat exchange unit 50; and the heating circulating pump 65 is arranged in the heating loop and is between the heating return water pipeline and the large-temperature-difference heat exchange unit 50.

[0069] Further, the first electric valve 71 is arranged in the hot water storage loop and is on the liquid inlet pipeline corresponding to the heat storage and heat exchange device 20; the second electric valve 72 is arranged in the heat release circulating loop and is on the water inlet pipeline corresponding to the heat storage water tank 30; the third electric valve 73 is arranged in the heat release circulating loop and is on the water outlet pipeline corresponding to the heat storage water tank 30; and the fourth electric valve 74 is arranged in the heat release circulating loop and is between the water inlet pipeline and the water outlet pipeline corresponding to the auxiliary heating device 40, one end of which is connected to the large-temperature-difference heat exchange unit 50 and the other end of which is connected to the heat storage water tank 30.

[0070] Further, the first temperature sensor 81 is arranged in the heat energy transmission loop and is on the liquid outlet pipeline corresponding to the solar collector 10; the second temperature sensor 82 is arranged in the hot water storage loop and is on the water outlet pipeline corresponding to the heat storage water tank 30; the third temperature sensor 83 is arranged in the heat release circulating loop and is on the water outlet pipeline corresponding to the heat storage water tank 30; the fourth temperature sensor 84 is arranged in the heat release circulating loop and is on the water inlet pipeline corresponding to the large-temperature-difference heat exchange unit 50; and the fifth temperature sensor 85 is arranged in the heating loop and is between the heating return water pipeline and the large-temperature-difference heat exchange unit 50.

[0071] In a specific implementation, the heat storage water tank 30 is charged before the heating season, so that the overall water temperature of the heat storage water tank 30 is at a set temperature, and the heat collection circulating pump 61 is in an open state during charging; the heat storage circulating pump 62, the first electric valve 71, the second electric valve 72, and the third electric valve 73 are in an open state; the auxiliary heating device circulating pump 63, the heat release circulating pump 64, the heating circulating pump 65, and the fourth electric valve 74 are in a closed state. During the heating season, the solar heat storage and heating system has five modes: heat storage water tank 30 alone heating, solar collector 10 only heating without heat storage, solar collector 10 heating while storing heat, solar collector 10 and heat storage water tank 30 common heating, and auxiliary heating device 40 auxiliary heating.

[0072] Here, in the heat storage water tank 30 alone heating mode, when the temperature collected by the first temperature sensor 81 during the day is less than the first temperature set value, the heat storage water tank 30 is preferentially used for independent heating. That is, the heat collection circulating pump 61, the heat storage circulating pump 62, the auxiliary heating device circulating pump 63, and the first electric valve 71 are in a closed state, and the heat release circulating pump 64, the heating circulating pump 65, the second electric valve 72, the third electric valve 73, and the fourth electric valve 74 are in an open state.

[0073] Here, in the solar collector 10 only heating without heat storage mode, when the temperature collected by the first temperature sensor 81 during the day is greater than or equal to the first temperature set value, the temperature collected by the second temperature sensor 82 is greater than or equal to the second temperature set value, and the temperature collected by the fifth temperature sensor 85 is greater than or equal to the third temperature set value; or the temperature collected by the first temperature sensor 81 is greater than or equal to the first temperature set value, the temperature collected by the second temperature sensor 82 is less than the second temperature set value, and the temperature collected by the fifth temperature sensor 85 is less than the third temperature set value, then the heat storage water tank 30 or the auxiliary heating device 40 heating is closed, and only the solar collector 10 is used. That is, the heat collection circulating pump 61, the heat storage circulating pump 62, the heating circulating pump 65, the first electric valve 71, and the fourth electric valve 74 are in an open state, and the auxiliary heating device circulating pump 63, the heat release circulating pump 64, the second electric valve 72, and the third electric valve 73 are in a closed state.

[0074] Here, in the solar energy collector 10 side heat storage side heating mode, during the day, when the first temperature sensor 81 collected temperature is greater than or equal to the first temperature set value, the second temperature sensor 82 collected temperature is less than the second set value, and the fifth temperature sensor 85 collected temperature is greater than or equal to the third temperature set value, the solar energy collector 10 side storage side heating mode is used, that is, the heat collecting circulating pump 61, the heat storage circulating pump 62, the heat releasing circulating pump 64, the heating circulating pump 65, the first electric valve 71, the second electric valve 72, the third electric valve 73, and the fourth electric valve 74 are in the open state, and the auxiliary heating device circulating pump 63 is in the closed state.

[0075] Here, in the solar energy collector 10 and heat storage water tank 30 common heating mode, when the solar energy collector 10 only heats without heat storage state, if the fifth temperature sensor 85 collected temperature is less than the third temperature set value, the heat storage water tank 30 and the solar energy collector 10 are heated together. That is, the heat collecting circulating pump 61, the heat storage circulating pump 62, the heat releasing circulating pump 64, the heating circulating pump 65, the first electric valve 71, the second electric valve 72, the third electric valve 73, and the fourth electric valve 74 are in the open state, and the auxiliary heating device circulating pump 63 is in the closed state.

[0076] Here, in the auxiliary heating device 40 auxiliary heating mode, at night, when the third temperature sensor 83 collected temperature is less than the second temperature set value, the auxiliary heating device 40 is started to assist heating, so that the fourth temperature sensor 84 is greater than or equal to the second temperature set value, that is, the auxiliary heating device circulating pump 63, the heat releasing circulating pump 64, the heating circulating pump 65, the second electric valve 72, and the third electric valve 73 are in the open state, and the heat collecting circulating pump 61, the heat storage circulating pump 62, the first electric valve 71, and the fourth electric valve 74 are in the closed state.

[0077] It should be noted that the above-mentioned first temperature set value, second temperature set value and third temperature set value can be set according to actual needs, which are not limited here.

[0078] As a possible implementation, please refer to Figure 3 , Figure 3 is a structure diagram of a solar energy heat storage and heating system provided by the embodiment.

[0079] As Figure 3As shown in the figure, the solar heat storage heating system provided by the embodiment includes a solar heat collector 10, a heat storage heat exchanger 20, a heat storage water tank 30, an auxiliary heating device 40, a large-temperature-difference heat exchanger unit 50, a heat collection circulating pump 61, a heat storage circulating pump 62, an auxiliary heating device circulating pump 63, a heat release circulating pump 64 and a heating circulating pump 65, a first electric valve 71, a second electric valve 72, a third electric valve 73 and a fourth electric valve 74, a first temperature sensor 81, a second temperature sensor 82, a third temperature sensor 83, a fourth temperature sensor 84 and a fifth temperature sensor 85. It also includes a solar heat collection liquid supplementing constant pressure device 91, a heat storage water tank water supplementing constant pressure device 92 and a heating water supplementing constant pressure device 93.

[0080] Specifically, the solar heat collection liquid supplementing constant pressure device 91 is connected to the liquid outlet pipeline corresponding to the solar heat collector 10 in the heat energy transmission loop. The heat storage water tank water supplementing constant pressure device 92 is connected to the water outlet pipeline corresponding to the heat storage water tank 30 in the hot water storage loop. The heating water supplementing constant pressure device 93 is connected to the water inlet pipeline corresponding to the large-temperature-difference heat exchanger unit 50 in the heating loop.

[0081] Here, the solar heat collector 10 is equipped with the solar heat collection liquid supplementing constant pressure device 91 for supplementing the antifreeze liquid of the solar heat collector 10 and maintaining the pressure; the heat storage water tank 30 and the heating side are respectively provided with the heat storage water tank water supplementing constant pressure device 92 and the heating water supplementing constant pressure device 93 for supplementing the water source of the heat storage water tank 30, the large-temperature-difference heat exchanger unit 50 and the heating loop and maintaining the pressure.

[0082] The solar heat storage heating system provided by the embodiment includes a solar heat collector, a heat storage heat exchanger, a heat storage water tank, an auxiliary heating device and a large-temperature-difference heat exchanger unit; the solar heat collector is connected to one end of the heat storage heat exchanger through a pipeline; the other end of the heat storage heat exchanger is connected to the heat storage water tank through a pipeline; the heat storage water tank is connected to one end of the large-temperature-difference heat exchanger unit through a pipeline, and the other end of the large-temperature-difference heat exchanger unit is connected to a heating water pipe; the auxiliary heating device is connected between the large-temperature-difference heat exchanger unit and the heat storage water tank, and on the water inlet pipeline corresponding to the large-temperature-difference heat exchanger unit.

[0083] As a possible implementation, please refer to Figure 4 , Figure 4 The structure diagram of the large-temperature-difference heat exchanger unit 50 provided by the embodiment is shown.

[0084] As Figure 4As shown in the figure, the large temperature difference heat exchange unit 50 provided by the embodiment includes: a first condenser 51, a second condenser 52, a first evaporator 55, a second evaporator 56, a first generator 53, a second generator 54, a first absorber 57, a second absorber 58, a plate heat exchanger 59, a first bypass pipe 510, and a second bypass pipe 511.

[0085] Specifically, one end of the first condenser 51 is connected to the secondary side water outlet of the plate heat exchanger 59, and the other end is connected to the second condenser 52; one end of the second condenser 52 is connected to the first condenser 51, and the other end is connected to the second absorber 58; one end of the first generator 53 is connected to the primary side water inlet of the plate heat exchanger 59, and the other end is connected to one end of the second generator 54; the other end of the second generator 54 is connected to one end of the first absorber 57, and the other end of the first absorber 57 is connected to the heat storage water tank 30 as a water inlet port; one end of the first evaporator 55 is connected to the secondary side water outlet of the plate heat exchanger 59, and the other end is connected to the second evaporator 56; one end of the second evaporator 56 is connected to the first evaporator 55, and the other end is connected to the heat storage water tank 30 as a water outlet port; one end of the first absorber 57 is connected to the secondary side water outlet of the plate heat exchanger 59, and the other end is connected to one end of the second absorber 58; the other end of the second absorber 58 is connected to the second condenser 52; the first bypass pipe 510 connects the water inlet port of the heat storage water tank 30 and the primary side water inlet of the plate heat exchanger 59, and the second bypass pipe 511 connects the water outlet port of the heat storage water tank 30 and the primary side water outlet of the plate heat exchanger 59.

[0086] Here, the primary network water flowing out of the plate heat exchanger 59 flows in the evaporator heat transfer pipe and exchanges heat with the refrigerant water sprayed outside the pipe in a vacuum environment. The refrigerant water absorbs the heat of the residual water in the pipe and evaporates, and the refrigerant vapor enters the absorber and is absorbed by the lithium bromide concentrated solution. The concentrated solution is sprayed outside the absorber heat transfer pipe and becomes a dilute solution after absorbing the refrigerant vapor generated in the evaporator. The generated absorption heat is taken away by the secondary network water flowing in the heat transfer pipe, which not only maintains the capacity of the absorber but also increases the temperature of the secondary network water. The concentrated solution from the absorber is heated by the primary network water in the generator to become a concentrated solution, and a large amount of refrigerant vapor is generated and enters the condenser. The secondary network water from the absorber enters the heat transfer pipe of the condenser and absorbs the heat of the refrigerant vapor outside the pipe, and the temperature is again increased to enter the heating system in the heat exchange station; the refrigerant vapor releases heat and condenses into refrigerant water, which enters the evaporator again to absorb the heat of the primary network water after heat exchange from the plate heat exchanger.

[0087] Here, the dilute solution from the absorber and the concentrated solution from the generator are heat exchanged in the heat exchanger, that is, the temperature of the concentrated solution entering the absorber is reduced to enhance the absorption effect, and the temperature of the solution entering the generator is increased, thereby reducing the consumption of high-grade heat energy of the generator. The secondary network backwater and the primary network water from the generator are heat exchanged in the plate heat exchanger 59, and the heat exchanged secondary network supply water enters the heating system in the heat exchange station, and the primary network water from the plate heat exchanger 59 enters the evaporator to release heat.

[0088] Among them, the absorption heat pump (taking lithium bromide absorption heat pump as an example) of the large-temperature-difference heat exchange unit 50 has a solution heat exchanger for heat exchange between dilute solution and concentrated solution, and improves the heat efficiency of the unit. There is a solution pump for conveying lithium bromide solution. There is a refrigerant pump for conveying refrigerant.

[0089] Optionally, the absorption heat pump of the large-temperature-difference heat exchange unit can select different working pairs, such as ammonia-water absorption heat pump.

[0090] The embodiment of the application provides a solar heat storage and heating system, which comprises a solar heat collector, a heat storage heat exchanger, a heat storage water tank, an auxiliary heating device and a large-temperature-difference heat exchange unit; the solar heat collector is connected to one end of the heat storage heat exchanger through a pipeline; the other end of the heat storage heat exchanger is connected to the heat storage water tank through a pipeline; the heat storage water tank is connected to one end of the large-temperature-difference heat exchange unit through a pipeline, and the other end of the large-temperature-difference heat exchange unit is connected to a heating water pipe; the auxiliary heating device is connected between the large-temperature-difference heat exchange unit and the heat storage water tank and corresponds to the water inlet pipeline of the large-temperature-difference heat exchange unit. Efficient cross-season heat storage and good heat storage effect can be realized.

[0091] The above only describes preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A solar thermal storage and supply system, characterized in that, The solar energy collector, the heat storage heat exchanger, the heat storage water tank, the auxiliary heating device and the large temperature difference heat exchanger unit are connected by pipelines. One end of the solar energy collector is connected to one end of the heat storage heat exchanger through a pipeline. The other end of the heat storage heat exchanger is connected to one end of the heat storage water tank through a pipeline. One end of the heat storage water tank is connected to one end of the large temperature difference heat exchanger unit through a pipeline, and the other end of the large temperature difference heat exchanger unit is connected to a heating water pipe. The auxiliary heating device is connected between the large temperature difference heat exchanger unit and the heat storage water tank, and is arranged on the water inlet pipeline corresponding to the large temperature difference heat exchanger unit.

2. The solar energy heat storage heating system according to claim 1, wherein: a heat energy transmission loop is formed between the solar energy collector and the heat storage heat exchanger; a hot water storage loop is formed between the heat storage heat exchanger and the heat storage water tank; a heat release circulation loop is formed between the heat storage water tank and the large temperature difference heat exchanger unit through the auxiliary heating device; and a heating loop is formed between the large temperature difference heat exchanger unit and the heating water pipe. The solar energy heat storage heating system further comprises a heat collection circulation pump, a heat storage circulation pump, an auxiliary heating device circulation pump, a heat release circulation pump and a heating circulation pump. The heat collection circulation pump is arranged on the heat energy transmission loop and the liquid outlet pipeline of the solar energy collector. The heat storage circulation pump is arranged on the hot water storage loop and the water outlet pipeline corresponding to the heat storage water tank. The auxiliary heating device circulation pump is arranged on the heat release circulation loop and the water inlet pipeline corresponding to the auxiliary heating device.

3. The solar thermal heating and power system of claim 2, wherein, The heat release circulation pump is arranged on the heat release circulation loop and the water inlet pipeline corresponding to the large temperature difference heat exchanger unit. The heating circulation pump is arranged on the heating loop between the heating return water pipe of the heating water pipe and the large temperature difference heat exchanger unit. The solar energy heat storage heating system further comprises a first electric valve, a second electric valve, a third electric valve and a fourth electric valve. The first electric valve is arranged on the hot water storage loop and the liquid inlet pipeline corresponding to the heat storage heat exchanger. The second electric valve is arranged on the heat release circulation loop and the water inlet pipeline corresponding to the heat storage water tank. The third electric valve is arranged on the heat release circulation loop and the water outlet pipeline corresponding to the heat storage water tank.

4. The solar thermal heating and storage system of claim 2, wherein, The fourth electric valve is arranged on the heat release circulation loop and between the water inlet pipeline and the water outlet pipeline corresponding to the auxiliary heating device, one end of the fourth electric valve is connected to the large temperature difference heat exchanger unit, and the other end of the fourth electric valve is connected to the heat storage water tank. The solar energy heat storage heating system further comprises a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor and a fifth temperature sensor. The first temperature sensor is arranged on the heat energy transmission loop and the liquid outlet pipeline corresponding to the solar energy collector. The second temperature sensor is arranged on the hot water storage loop and the water outlet pipeline corresponding to the heat storage water tank. The third temperature sensor is arranged on the heat release circulation loop and the water outlet pipeline corresponding to the heat storage water tank.

5. The solar thermal heating and power system of claim 2, wherein, The fourth temperature sensor is arranged on the heat release circulation loop and the water inlet pipeline corresponding to the large temperature difference heat exchanger unit. ​ ​ ​ ​ The fifth temperature sensor is arranged in the heating loop between a heating return water pipe and the large-temperature-difference heat exchanger unit.

6. The solar thermal heating and power system of claim 2, wherein, The solar heat storage and supply system further comprises a solar heat collection liquid supplementing constant pressure device. The solar heat collection liquid supplementing constant pressure device is connected to a corresponding liquid outlet pipeline of the solar heat collector in the heat energy transmission loop.

7. The solar thermal heating and power system of claim 2, wherein, The solar heat storage and supply system further comprises a heat storage water tank liquid supplementing constant pressure device. The heat storage water tank liquid supplementing constant pressure device is connected to a corresponding water outlet pipeline of the heat storage water tank in the hot water storage loop.

8. The solar thermal heating and power system of claim 2, wherein, The solar heat storage and supply system further comprises a heating liquid supplementing constant pressure device. The heating liquid supplementing constant pressure device is connected to a corresponding water inlet pipeline of the large-temperature-difference heat exchanger unit in the heating loop.

9. The solar thermal heating and power system of claim 1, wherein, The large-temperature-difference heat exchanger unit comprises a first condenser, a second condenser, a first evaporator, a second evaporator, a first generator, a second generator, a first absorber, a second absorber, a plate heat exchanger, a first bypass pipe and a second bypass pipe. One end of the first condenser is connected to a secondary side water outlet of the plate heat exchanger, and the other end is connected to the heating water supply pipe in the heating water pipe after being combined with the second condenser; one end of the second condenser is connected to the first condenser, and the other end is connected to the second absorber. One end of the first generator is connected to a primary side water inlet of the plate heat exchanger, and the other end is connected to one end of the second generator; the other end of the second generator is connected to one end of the first absorber, and the other end of the first absorber is connected to the heat storage water tank as a water inlet port. One end of the first evaporator is connected to a secondary side water outlet of the plate heat exchanger, and the other end is connected to the second evaporator; one end of the second evaporator is connected to the first evaporator, and the other end is connected to the heat storage water tank as a water outlet port. One end of the first absorber is connected to a secondary side water outlet of the plate heat exchanger, and the other end is connected to one end of the second absorber after being combined with the heating return water pipe in the heating water pipe; the other end of the second absorber is connected to the second condenser. The first bypass pipe connects a water supply port of the heat storage water tank and a primary side water inlet of the plate heat exchanger, and the second bypass pipe connects a water return port of the heat storage water tank and a primary side water outlet of the plate heat exchanger.

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