A heating device that stores heat in the non-heating season and provides peak-load heating in the heating season

Abstract

The present invention relates to a heating device for heat storage in non-heating season and peak-shaving heating in heating season, comprising a heat source, a heat storage body, a heat exchanger, an absorption heat pump unit and a first group of heat users; the heat source is connected to the first group of heat users, and a water supply pipeline is connected to the heat storage body through a heat storage water supply pipeline, and a return water pipeline is connected to the heat storage body through a heat storage return water pipeline, and a switch valve 2 is arranged on both the heat storage water supply pipeline and the heat storage return water pipeline; and the heat storage body, the heat exchanger and the absorption heat pump unit are connected between the heat source and the first group of heat users, and when the heat load demand of the first group of heat users is less than the heating capacity of the heat source, the heat source simultaneously supplies heat to the first group of heat users and the heat storage body; when the heat load demand of the first group of heat users is greater than the heating capacity of the heat source, the heat source, the heat storage body, the heat exchanger and the absorption heat pump unit together supply heat to the first group of heat users. The present invention not only meets the heating demand but also avoids the waste of the waste heat in the early cold period by recycling the waste heat in the early cold period for use in the severe cold period.

Description

Technical Field

[0001] The present invention belongs to the field of energy and power, and specifically relates to a heating device which can store heat in a non-heating season and provide peak-load heating in a heating season. Background Art

[0002] With the advancement of various national policies, measures and requirements, the regional boiler room heating method widely used in centralized heating systems is gradually being replaced by cogeneration or industrial waste heat heating due to high carbon emissions and high operating costs.

[0003] However, neither cogeneration power plants nor industrial waste heat can support a wide range of load changes. Therefore, a new heating mode has been developed in which cogeneration or industrial waste heat bears the basic load and boilers are used as peak-shaving heat sources for heating. However, this mode still has two problems. On the one hand, during the early cold period, due to the limitations of power dispatching and peak-shaving capabilities, the heat of the power plant cannot be fully recovered for heating, and part of the heat needs to be discharged into the environment. On the other hand, during the severe cold period, peak-shaving heat sources such as boilers are needed to supplement the heat, which still has large carbon emissions and poor economic efficiency. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a heating device that stores heat in the non-heating season and provides peak-shaving heating in the heating season. By storing the heat discharged in the early cold period and releasing the heat in the severe cold period, the fuel consumption of the peak-shaving heat source is reduced, the operating economy of the heating network is improved, and carbon emissions are reduced. In addition, by preheating the heat storage body using natural heat sources or industrial waste heat in the non-heating season, the cost of heat storage in the early cold period can be further reduced.

[0005] The first aspect of the present invention provides a heating device for storing heat in a non-heating season and for peak-shaving heating in a heating season, comprising a heat source, a heat storage body, a heat exchanger, an absorption heat pump unit and a first group of heat users; the heat source is connected to the first group of heat users via a water supply pipeline and a water return pipeline, the water supply pipeline and the water return pipeline are respectively provided with a first switch valve, and the water supply pipeline is connected to the heat storage body via a heat storage water supply pipeline, the water return pipeline is connected to the heat storage body via a heat storage water return pipeline, and the heat storage water supply pipeline and the heat storage water return pipeline are both provided with a second switch valve;

[0006] The heat storage body, heat exchanger and absorption heat pump unit are connected between the heat source and the first group of heat users. When the heat load demand of the first group of heat users is less than the heating capacity of the heat source, the heat source supplies heat to the first group of heat users and the heat storage body at the same time; when the heat load demand of the first group of heat users is greater than the heating capacity of the heat source, the heat source, heat storage body, heat exchanger and absorption heat pump unit together supply heat to the first group of heat users.

[0007] Furthermore, the heat storage body is connected to the absorption heat pump unit through a heat storage body outlet pipe and a heat storage body inlet pipe, and a switch valve four is provided on the heat storage body outlet pipe. When the switch valve four is connected, the hot water in the heat storage body enters the generator of the absorption heat pump unit, and then enters the heat release side of the heat exchanger for cooling, and then enters the evaporator of the absorption heat pump unit for cooling again. The cooled water enters the heat storage body again; when the heat load demand of the first group of heat users is greater than the heating capacity of the heat source, the heat generated by the cooling of the hot water in the heat storage body in the heat exchanger and the absorption heat pump unit and the heat of the heat source together provide heat for the first group of heat users.

[0008] Furthermore, the return pipes on both sides of the switch valve 1 are respectively connected to the second return pipe and the second water supply pipe, the second return pipe is provided with a switch valve 3, and the heat exchanger and the absorption heat pump unit are connected in parallel between the second return pipe and the second water supply pipe.

[0009] Furthermore, it also includes a heat pump, which is connected in parallel between the second water return pipeline and the second water supply pipeline;

[0010] When the switch valve four is connected, the hot water in the heat storage body enters the generator of the absorption heat pump unit, then enters the heat release side of the heat exchanger for cooling, then enters the evaporator of the heat pump for cooling, and finally enters the evaporator of the absorption heat pump unit for cooling. The cooled water enters the heat storage body again.

[0011] Furthermore, it also includes a heat pump, and the heat pump and the absorption heat pump unit are connected in series and then in parallel between the second water return pipeline and the second water supply pipeline;

[0012] When the switch valve four is connected, the hot water in the heat storage body enters the generator of the absorption heat pump unit, then enters the heat release side of the heat exchanger for cooling, then enters the evaporator of the heat pump for cooling, and finally enters the evaporator of the absorption heat pump unit for cooling. The cooled water enters the heat storage body again.

[0013] Furthermore, the return pipes on both sides of the switch valve 1 are respectively connected to the second return pipe and the second water supply pipe, the second return pipe is provided with a switch valve 3, and the heat exchanger and the absorption heat pump unit are connected in series and connected between the second return pipe and the second water supply pipe.

[0014] Furthermore, the return water pipeline on the right side of the switch valve is connected to the second return water pipeline, the water supply pipeline is connected to the second water supply pipeline, and the heat exchanger and the absorption heat pump unit are connected in parallel between the second return water pipeline and the second water supply pipeline.

[0015] Furthermore, the second water return pipeline and the second water supply pipeline are both provided with a switch valve three, and the switch valve three on the second water supply pipeline is connected in parallel with a boiler.

[0016] The second aspect of the present invention provides a heating device for storing heat in the non-heating season and for peak-shaving heating in the heating season, comprising a heat source, a heat storage body, a heat exchanger, an absorption heat pump unit, a first group of heat users and a second group of heat users;

[0017] The heat source is connected to the first group of heat users through a water supply pipeline and a water return pipeline, and the water supply pipeline is connected to the heat storage body through a heat storage water supply pipeline, and the water return pipeline is connected to the heat storage body through a heat storage water return pipeline, and the heat storage water supply pipeline and the heat storage water return pipeline are both provided with a second switch valve;

[0018] The heat storage body, heat exchanger and absorption heat pump unit are connected between the heat source and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is less than the heating capacity of the heat source, the heat source provides heat to the heat storage body, the first group of heat users and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is greater than the heating capacity of the heat source, the heat source provides heat to the first group of heat users, and the heat storage body, heat exchanger and absorption heat pump unit provide heat to the second group of heat users.

[0019] Furthermore, the heat storage body water outlet pipe and the heat storage body water inlet pipe are both connected between the heat storage body and the absorption heat pump unit, and a switch valve four is provided on the heat storage body water outlet pipe. After the switch valve four is connected, the hot water of the heat storage body first enters the generator of the absorption heat pump unit, enters the heat release side of the heat exchanger for cooling, and then enters the evaporator of the absorption heat pump unit for cooling again. The cooled low-temperature water returns to the heat storage body; when the total heat demand of the first group of heat users and the second group of heat users is greater than the heating capacity of the heat source, the hot water in the hot water storage body enters the heat exchanger and the absorption heat pump unit for cooling, and the energy generated by the cooling provides heat for the second group of heat users.

[0020] Furthermore, the second group of heat users is connected to a second return water pipeline and a second water supply pipeline, and the heat exchanger and the absorption heat pump unit are connected in parallel and connected between the second return water pipeline and the second water supply pipeline, connecting pipes are connected between the second return water pipeline and the return water pipeline, and between the second water supply pipeline and the water supply pipeline, and a switch valve five is provided on the connecting pipe, and a switch valve three is provided on the second return water pipeline on the left side of the connecting pipe.

[0021] Furthermore, it also includes a boiler, the second water supply pipeline is provided with a switch valve three, and the boiler is connected in parallel on both sides of the switch valve three on the second water supply pipeline.

[0022] Furthermore, the second group of heat users is connected to a second return water pipeline and a second water supply pipeline, and the heat exchanger and the absorption heat pump unit are connected in series and connected between the second return water pipeline and the second water supply pipeline. Connecting pipes are connected between the second return water pipeline and the return water pipeline, and between the second water supply pipeline and the water supply pipeline, and a switch valve five is provided on the connecting pipes.

[0023] Furthermore, it also includes a boiler, the second water supply pipeline is provided with a switch valve three, and the boiler is connected in parallel on both sides of the switch valve three on the second water supply pipeline.

[0024] It can be seen from the above technical solution that the heating device provided by the present invention, which stores heat in the non-heating season and provides peak-load heating in the heating season, has the following beneficial effects:

[0025] By recovering the waste heat in the early cold period for use in the severe cold period, we can not only meet the heating demand, but also avoid the waste of waste heat in the early cold period, reduce the gas consumption in the severe cold period, reduce carbon emissions, and improve the economy of system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a connection diagram of a heating device for storing heat in the non-heating season and for peak-shaving heating in the heating season according to the second embodiment of the present invention;

[0027] Figure 2 This is a connection diagram of a heating device for storing heat in the non-heating season and for peak-shaving heating in the heating season according to the third embodiment of the present invention;

[0028] Figure 3 This is a connection diagram of a heating device for storing heat in the non-heating season and for peak-shaving heating in the heating season according to the fourth embodiment of the present invention;

[0029] Figure 4 This is a connection diagram of a heating device for storing heat in the non-heating season and for peak-shaving heating in the heating season according to the sixth and seventh embodiments of the present invention;

[0030] Figure 5 This is a connection diagram of a heating device for storing heat in the non-heating season and for peak-shaving heating in the heating season according to the fifth embodiment of the present invention;

[0031] Figure 6 This is a connection diagram of a heating device for storing heat in the non-heating season and for peak-shaving heating in the heating season according to the ninth and tenth embodiments of the present invention;

[0032] Figure 7 This is a connection diagram of a heating device that stores heat in the non-heating season and provides peak-load heating in the heating season according to the eleventh and twelfth embodiments of the present invention. DETAILED DESCRIPTION

[0033] In order to better understand the purpose, structure and function of the present invention, a heating device for storing heat in the non-heating season and for peak-shaving heating in the heating season of the present invention is described in further detail below.

[0034] First aspect: The present invention provides a heating device that stores heat in the non-heating season and provides peak-shaving heating in the heating season. When the heat load demand of the heat users is small, such as in the early cold period, the heat source provides heat to the heat users, and the surplus heat is stored in the heat storage body. When the heat load demand of the heat users is large, such as in the severe cold period, the heat stored in the heat storage body and the heat source are used to provide heat to the heat users at the same time. This is described in detail below through several specific embodiments.

[0035] Embodiment 1:

[0036] like Figure 1-Figure 5 As shown, a heating device for storing heat in a non-heating season and for peak-shaving heating in a heating season comprises a heat source 1, a heat storage body 2, a heat exchanger 3, an absorption heat pump unit 7 and a first group of heat users 6, wherein the heat storage body 2, the heat exchanger 3 and the absorption heat pump unit 7 constitute a peak-shaving heat source for peak-shaving heating in a severe cold period; wherein the heat source 1 is connected to the first group of heat users 6 through a water supply pipeline 9 and a return water pipeline 10, and a switch valve 11 is respectively provided on the water supply pipeline 9 and the return water pipeline 10, the water supply pipeline 9 is connected to the heat storage body 2 through a heat storage water supply pipeline 12, and the return water pipeline 10 is connected to the heat storage body 2 through a heat storage return water pipeline 13, and a switch valve 2 14 is provided on the heat storage water supply pipeline 12 and the heat storage return water pipeline 13; and the heat storage body 2, the heat exchanger 3 and the absorption heat pump unit 7 are connected between the heat source 1 and the first group of heat users 6, when the first group of heat users 6 When the heat load demand is less than the heating capacity of the heat source 1, the heat source 1 supplies heat to the first group of heat users 6 and the heat storage body 2 at the same time; when the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the heat source 1, the heat storage body 2, the heat exchanger 3 and the absorption heat pump unit 7 together supply heat to the first group of heat users 6.

[0037] Specifically, the heat storage body 2 is connected to the absorption heat pump unit 7 through the heat storage body outlet pipe 18 and the heat storage body inlet pipe 19, and the heat storage body outlet pipe 18 is provided with a switch valve four 20. When the switch valve four 20 is connected, the hot water in the heat storage body 2 enters the generator of the absorption heat pump unit 7, and then enters the heat release side of the heat exchanger 3 for cooling, and then enters the evaporator of the absorption heat pump unit 7 for cooling again. The cooled water enters the heat storage body 2 again; when the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the heat generated by the cooling of the hot water in the heat storage body 2 in the heat exchanger 3 and the absorption heat pump unit 7 and the heat from the heat source 1 together provide heat for the first group of heat users.

[0038] In addition, when the switch valve 11 on the water supply pipeline 9 and the return pipeline 10 is disconnected, and the switch valve 2 14 on the heat storage water supply pipeline 12 and the heat storage return pipeline 13 is disconnected, it can be used to preheat the heat storage body using natural heat sources or industrial waste heat in the non-heating season. The heat is stored in the heat storage body, realizing heat storage in the non-heating season, thereby reducing the cost of heat storage in the heat storage body during the early cold period.

[0039] Embodiment 2:

[0040] Based on the first embodiment, the heat exchanger 3 and the absorption heat pump unit 7 are connected in parallel. Figure 1 As shown, specifically, the return pipe 10 on both sides of the switch valve 11 is respectively connected to the second return pipe 16 and the second water supply pipe 15, the second return pipe 16 is provided with a switch valve 3 17, and the heat exchanger 3 and the absorption heat pump unit 7 are connected in parallel between the second return pipe 16 and the second water supply pipe 15.

[0041] Therefore, when the heat load demand of the first group of heat users 6 is less than the heating capacity of the heat source 1 , the heat source 1 supplies hot water to the first group of heat users 6 and the heat storage body 2 , as in the first embodiment.

[0042] When the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the heat source 1 alone cannot meet the heat load demand of the first group of heat users 6. At this time, the switch valve 11 on the return water pipeline 10 is disconnected, and the other switch valve 11, the switch valve 2 14 and the switch valve 3 17 are all in a connected state. Therefore, the return water generated by the first group of heat users 6 enters the second return water pipeline 16 through the return water pipeline 10, and the return water entering the second return water pipeline 16 is divided into two paths. The first path enters the absorption heat pump unit 7 to absorb heat and heat up, and the second path enters the heat receiving side of the heat exchanger 3 to absorb heat and heat up. The heated water in the two paths enters the return water pipeline 10 between the switch valve 11 and the heat source 1 together, enters the heat source 1 again through the return water pipeline 10 for heating, and then is supplied to the first group of heat users 6. At this time, the heat absorbed by the two return waters in the heat exchanger 3 and the absorption heat pump unit 7 all comes from the heat storage body 2. Specifically, after the switch valve 20 is adjusted to the connected state, the hot water in the heat storage body enters the generator of the absorption heat pump unit 7, the heat release side of the heat exchanger 3 and the evaporator of the absorption heat pump unit 7 in turn for cooling. The cooled low-temperature water returns to the heat storage body 2, and the heat generated by the cooling of the hot water is absorbed by the return water.

[0043] Embodiment three:

[0044] On the basis of the second embodiment, this embodiment further includes a heat pump 8, which is connected in parallel between the second water return pipe 16 and the second water supply pipe 15. Figure 2 As shown; when the switch valve four 20 is connected, the hot water in the heat storage body enters the generator of the absorption heat pump unit 7, then enters the heat release side of the heat exchanger 3 for cooling, and then enters the evaporator of the heat pump 8 for cooling again, and finally enters the evaporator of the absorption heat pump unit 7 for cooling. The cooled water enters the heat storage body again.

[0045] In addition, due to the addition of the heat pump 8, the return water entering the second return water pipeline 16 is divided into three paths. The first two paths are the same as those in Example 2. The third path of return water enters the heat pump 8 to absorb heat and heat up. The three paths of heated water enter the return water pipeline 10 between the switch valve 11 and the heat source 1 together, and then enters the heat source 1 again through the return water pipeline 10 to be heated and then supplied to the first group of heat users 6.

[0046] Embodiment 4:

[0047] On the basis of the second embodiment, this embodiment further includes a heat pump 8, and the heat pump 8 and the absorption heat pump unit 7 are connected in series and then in parallel between the second return water pipeline 16 and the second water supply pipeline 15. Figure 3 As shown; when the switch valve four 20 is connected, the hot water in the heat storage body enters the generator of the absorption heat pump unit 7, then enters the heat release side of the heat exchanger 3 for cooling, and then enters the evaporator of the heat pump 8 for cooling again, and finally enters the evaporator of the absorption heat pump unit 7 for cooling. The cooled water enters the heat storage body again.

[0048] In addition, the return water entering the second return water pipeline 16 is still divided into two paths as in the second embodiment, and the second return water is the same as in the second embodiment, but due to the addition of the heat pump 8, the difference from the second embodiment is that the first return water enters the absorption heat pump unit 7 to absorb heat and heat up, and then enters the heat pump 8 again to heat up. The hot water heated by the heat pump 8 and the hot water obtained after the second return water is heated are mixed together and enter the heat source 1 for heating.

[0049] Embodiment five:

[0050] On the basis of the second embodiment, the heat exchanger 3 and the absorption heat pump unit 7 are connected in series in this embodiment. Figure 5 As shown, the return pipe 10 on both sides of the switch valve 11 is respectively connected to the second return pipe 16 and the second water supply pipe 15, the second return pipe 16 is provided with a switch valve 3 17, and the heat exchanger 3 and the absorption heat pump unit 7 are connected in series and connected between the second return pipe 16 and the second water supply pipe 15.

[0051] In this embodiment, when the heat load demand of the first group of heat users 6 is less than the heating capacity of the heat source 1 , the heat source 1 supplies hot water to the first group of heat users 6 and the heat storage body 2 , as in the second embodiment.

[0052] When the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the switch valve 11 on the return water pipeline 10 is disconnected, and the return water of the first group of heat users 6 enters the second return water pipeline 16 through the return water pipeline 10. The return water entering the second return water pipeline 16 first enters the absorption heat pump unit 7 to absorb heat and heat up, and then enters the heat receiving side of the heat exchanger 3 again to absorb heat and heat up. The heated water enters the heat source 1 again to be heated and then supplied to the first group of heat users 6.

[0053] At this time, the heat absorbed by the return water in the heat exchanger 3 and the absorption heat pump unit 7 all comes from the heat storage body 2. The connection relationship between the heat storage body 2, the heat exchanger 3 and the absorption heat pump unit 7 and the specific path of water flow are the same as those in the second embodiment.

[0054] Embodiment six:

[0055] On the basis of the second embodiment, in this embodiment, Figure 4 As shown, the return water pipeline 10 on the right side of the switch valve 11 is connected to the second return water pipeline 16, the water supply pipeline 11 is connected to the second water supply pipeline 15, and the heat exchanger 3 and the absorption heat pump unit 7 are connected in parallel between the second return water pipeline 16 and the second water supply pipeline 15.

[0056] In this embodiment, when the heat load demand of the first group of heat users 6 is less than the heating capacity of the heat source 1 , the heat source 1 supplies hot water to the first group of heat users 6 and the heat storage body 2 , as in the second embodiment.

[0057] When the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the switch valve 11 on the return water pipeline of the first group of heat users 6 is disconnected, and the other switch valves are connected. The return water of the first group of heat users enters the second return water pipeline 16 through the return water pipeline 10. The return water entering the second return water pipeline 16 is divided into two paths, one of which enters the absorption heat pump unit 7 to absorb heat and heat up, and the other enters the heat receiving side of the heat exchanger 3 to absorb heat and heat up. The two heated waters are mixed and then enter the water supply pipeline 9 to be supplied to the first group of heat users 6 together with the hot water of the heat source 1. At this time, the heat absorbed by the two return waters in the heat exchanger 3 and the absorption heat pump unit 7 comes from the heat storage body 2.

[0058] Embodiment seven:

[0059] On the basis of the sixth embodiment, this embodiment further includes a boiler 5, such as Figure 4 As shown, the second water supply pipeline 15 is provided with a switch valve 3 17 , and the switch valve 3 17 on the second water supply pipeline 15 is connected in parallel with the boiler 5 .

[0060] In this embodiment, the return water entering the second return water pipeline 16 is also divided into two paths, one of which enters the absorption heat pump unit 7 to absorb heat and heat up, and the other enters the heat receiving side of the heat exchanger 3 to absorb heat and heat up. The heated water in both paths enters the boiler 5 together and is added again. The hot water heated by the boiler 5 enters the water supply pipe 9 and is supplied to the first group of heat users 6 together with the hot water from the heat source 1.

[0061] The second aspect: The present invention also provides a heating device that stores heat in the non-heating season and provides peak-shaving heating in the heating season. When the heat load demand of the heat users is small, such as in the early cold period, the heat source provides heat to the heat users, and the surplus heat is stored in the heat storage body. When the heat load demand of the heat users is large, such as in the severe cold period, the heat source 1 provides heat to the first group of heat users, and the heat stored in the heat storage body is used to provide heat to the second group of heat users. This is explained in detail through several specific embodiments below.

[0062] Embodiment eight:

[0063] like Figure 6-Figure 7 As shown, a heating device for storing heat in the non-heating season and providing peak-load heating in the heating season comprises a heat source, a heat storage body, a heat exchanger 3, an absorption heat pump unit 7, a first group of heat users and a second group of heat users 6b, wherein the heat storage body 2, the heat exchanger 3 and the absorption heat pump unit 7 constitute a peak-load heating source for providing peak-load heating to the second group of heat users 6b during severe cold periods;

[0064] The heat source 1 is connected to the first group of heat users 6 through a water supply pipeline 9 and a water return pipeline 10, and the water supply pipeline 9 is connected to the heat storage body 2 through a heat storage water supply pipeline 12, and the water return pipeline 10 is connected to the heat storage body 2 through a heat storage water return pipeline 13, and a switch valve 2 14 is provided on the heat storage water supply pipeline 12 and the heat storage water return pipeline 13;

[0065] The heat storage body, the heat exchanger 3 and the absorption heat pump unit 7 are connected between the heat source 1 and the second group of heat users 6b. When the total heat demand of the first group of heat users 6 and the second group of heat users 6b is less than the heating capacity of the heat source, the heat source 1 provides heat to the heat storage body 2, the first group of heat users 6 and the second group of heat users 6b. When the total heat demand of the first group of heat users 6 and the second group of heat users 6b is greater than the heating capacity of the heat source 1, the heat source 1 provides heat to the first group of heat users 6, and the peak-shaving heat source composed of the heat storage body 2, the heat exchanger 3 and the absorption heat pump unit 7 provides heat to the second group of heat users.

[0066] Specifically, the heat storage body water outlet pipe 18 and the heat storage body water inlet pipe 19 are both connected between the heat storage body 2 and the absorption heat pump unit 7, and a switch valve four 20 is provided on the heat storage body water outlet pipe 18. When the switch valve four 20 is connected, the hot water of the heat storage body 2 first enters the generator of the absorption heat pump unit 7, enters the heat release side of the heat exchanger 3 for cooling, and then enters the evaporator of the absorption heat pump unit 7 for cooling again. The cooled low-temperature water returns to the heat storage body 2; when the total heat demand of the first group of heat users and the second group of heat users is greater than the heating capacity of the heat source, the hot water in the hot water storage body enters the heat exchanger 3 and the absorption heat pump unit 7 for cooling, and the energy generated by the cooling provides heat for the second group of heat users.

[0067] In addition, when the switch valve 11 on the water supply pipeline 9 and the return pipeline 10 is disconnected, and the switch valve 2 14 on the heat storage water supply pipeline 12 and the heat storage return pipeline 13 is disconnected, it can be used to preheat the heat storage body using natural heat sources or industrial waste heat in the non-heating season. The heat is stored in the heat storage body, realizing heat storage in the non-heating season, thereby reducing the cost of heat storage in the heat storage body during the early cold period.

[0068] Embodiment nine:

[0069] On the basis of Example 8, Figure 6 As shown, the heat exchanger 3 and the absorption heat pump unit 7 are connected in parallel, specifically, the second group of heat users 6b are connected to the second return water pipeline 16 and the second water supply pipeline 15, and the heat exchanger 3 and the absorption heat pump unit 7 are connected in parallel between the second return water pipeline 16 and the second water supply pipeline 15, and connecting pipes 21 are connected between the second return water pipeline 16 and the return water pipeline 10, and between the second water supply pipeline 15 and the water supply pipeline 9, and a switch valve five 22 is provided on the connecting pipe 21, and a switch valve three 17 is provided on the second return water pipeline 16 on the left side of the connecting pipe 21.

[0070] When the total heat load demand of the first group of heat users 6 and the second group of heat users 6 b is less than the heating capacity of the heat source 1 , the heat source 1 provides heat to the first group of heat users 6 and the second group of heat users 6 b, and at the same time stores excess heat in the heat storage body 2 through the heat storage water supply pipeline 12 .

[0071] When the total heat load demand of the first group of heat users 6 and the second group of heat users 6b is greater than the heating capacity of the heat source 1, the switch valve 2 14 and the switch valve 5 22 are disconnected, and the switch valve 3 17 is connected. At this time, the return water of the first group of heat users can only enter the heat source 1, and is heated by the heat source 1 and then supplied to the first group of heat users 6 for use again; the return water of the second group of heat users 6b enters the second return water pipeline 16, and the return water entering the second return water pipeline 16 is divided into two paths, one path is heated by the heat exchanger 3, and the other path is heated by the absorption heat pump unit 7. The two paths of heated hot water enter the second water supply pipeline 15 together and are supplied to the second group of heat users 6b through the second water supply pipeline 15.

[0072] The heat required for heating the return water after entering the second return water pipeline 16 mainly comes from the heat storage body 2. Specifically, after the switch valve 20 is connected, the hot water of the heat storage body 2 first enters the generator of the absorption heat pump unit 7, enters the heat release side of the heat exchanger 3 for cooling, and then enters the evaporator of the absorption heat pump unit 7 for cooling again. The cooled low-temperature water returns to the heat storage body 2. The energy generated by the hot water of the heat storage body cooling through the heat exchanger 3 and the absorption heat pump unit 7 is absorbed by the return water entering the second return water pipeline 16.

[0073] Embodiment ten:

[0074] On the basis of the ninth embodiment, this embodiment further includes a boiler 5, such as Figure 6 As shown, a switch valve 3 17 is provided on the second water supply pipeline, and the boiler 5 is connected in parallel on both sides of the switch valve 3 17 on the second water supply pipeline 15 .

[0075] In this embodiment, the boiler 5 is used to reheat the heated hot water entering the second water supply pipeline 15. At this time, the switch valve 3 17 is disconnected, and the hot water enters the boiler 5 and is heated again.

[0076] Embodiment eleven:

[0077] On the basis of the eighth embodiment, the heat exchanger 3 and the absorption heat pump unit 7 are connected in series in this embodiment. Figure 7 As shown, specifically, the second group of heat users 6b is connected to the second return water pipeline 16 and the second water supply pipeline 15, and the heat exchanger 3 and the absorption heat pump unit 7 are connected in series and connected between the second return water pipeline 16 and the second water supply pipeline 15, between the second return water pipeline 16 and the return water pipeline 10, and between the second water supply pipeline 15 and the water supply pipeline 9. A connecting pipe 21 is connected, and a switch valve five 22 is provided on the connecting pipe 21, and a switch valve three 17 is provided on the second return water pipeline 16 on the left side of the connecting pipe 21.

[0078] In this embodiment, when the total heat load demand of the first group of heat users 6 and the second group of heat users 6b is greater than the heating capacity of the heat source 1, the switch valve five 22 is disconnected and the switch valve three 17 is connected. At this time, the return water of the first group of heat users can only enter the heat source 1, and is heated by the heat source 1 and then supplied to the first group of heat users 6 for use again; the return water of the second group of heat users 6b enters the second return water pipeline 16, and the return water entering the second return water pipeline 16 is heated by the heat exchanger 3 and the absorption heat pump unit 7 in turn and then supplied to the second group of heat users 6b.

[0079] The heat required for heating the return water mainly comes from the heat storage body 2.

[0080] Embodiment 12:

[0081] On the basis of the eleventh embodiment, this embodiment further includes a boiler 5, such as Figure 7 As shown, a switch valve 3 17 is provided on the second water supply pipeline 15 , and the boiler 5 is connected in parallel to both sides of the switch valve 3 17 on the second water supply pipeline 15 .

[0082] In this embodiment, the boiler 5 is used to reheat the heated hot water entering the second water supply pipeline 15. At this time, the switch valve 3 17 is disconnected, and the hot water enters the boiler 5 and is heated again.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A heating device for storing heat in the non-heating season and for peak-shaving heating in the heating season, characterized in that: It includes a heat source, a heat storage body, a heat exchanger, an absorption heat pump unit and a first group of heat users; the heat source is connected to the first group of heat users through a water supply pipeline and a water return pipeline, the water supply pipeline and the water return pipeline are respectively provided with a switch valve 1, and the water supply pipeline is connected to the heat storage body through a heat storage water supply pipeline, the water return pipeline is connected to the heat storage body through a heat storage water return pipeline, and the heat storage water supply pipeline and the heat storage water return pipeline are both provided with a switch valve 2; The heat storage body, the heat exchanger and the absorption heat pump unit are connected between the heat source and the first group of heat users. When the heat load demand of the first group of heat users is less than the heating capacity of the heat source, the heat source simultaneously supplies heat to the first group of heat users and the heat storage body; when the heat load demand of the first group of heat users is greater than the heating capacity of the heat source, the heat source, the heat storage body, the heat exchanger and the absorption heat pump unit together supply heat to the first group of heat users. The heat storage body is connected to the absorption heat pump unit through a heat storage body outlet pipe and a heat storage body inlet pipe, and a switch valve four is provided on the heat storage body outlet pipe. When the switch valve four is connected, the hot water in the heat storage body enters the generator of the absorption heat pump unit, and then enters the heat release side of the heat exchanger for cooling, and then enters the evaporator of the absorption heat pump unit for cooling again. The cooled water enters the heat storage body again; when the heat load demand of the first group of heat users is greater than the heating capacity of the heat source, the heat generated by the cooling of the hot water in the heat storage body in the heat exchanger and the absorption heat pump unit and the heat of the heat source together provide heat for the first group of heat users.

2. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 1, characterized in that: The return water pipelines on both sides of the switch valve 1 are respectively connected to the second return water pipeline and the second water supply pipeline, the second return water pipeline is provided with a switch valve 3, and the heat exchanger and the absorption heat pump unit are connected in parallel between the second return water pipeline and the second water supply pipeline.

3. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 2, characterized in that: It also includes a heat pump, which is connected in parallel between the second water return pipeline and the second water supply pipeline; When the switch valve four is connected, the hot water in the heat storage body enters the generator of the absorption heat pump unit, then enters the heat release side of the heat exchanger for cooling, then enters the evaporator of the heat pump for cooling, and finally enters the evaporator of the absorption heat pump unit for cooling. The cooled water enters the heat storage body again.

4. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 2, characterized in that: It also includes a heat pump, and the heat pump and the absorption heat pump unit are connected in series and then in parallel between the second water return pipeline and the second water supply pipeline; When the switch valve four is connected, the hot water in the heat storage body enters the generator of the absorption heat pump unit, then enters the heat release side of the heat exchanger for cooling, then enters the evaporator of the heat pump for cooling, and finally enters the evaporator of the absorption heat pump unit for cooling. The cooled water enters the heat storage body again.

5. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 1, characterized in that: The return pipes on both sides of the switch valve 1 are respectively connected to the second return pipe and the second water supply pipe, the second return pipe is provided with a switch valve 3, and the heat exchanger and the absorption heat pump unit are connected in series and connected between the second return pipe and the second water supply pipe.

6. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 1, characterized in that: The return water pipeline on the right side of the switch valve 1 is connected to the second return water pipeline, the water supply pipeline is connected to the second water supply pipeline, and the heat exchanger and the absorption heat pump unit are connected in parallel between the second return water pipeline and the second water supply pipeline.

7. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 6, characterized in that: The second water supply pipeline is provided with a switch valve three, and the switch valve three on the second water supply pipeline is connected in parallel with a boiler.

8. A heating device that stores heat in the non-heating season and provides peak-load heating in the heating season, characterized in that: It includes a heat source, a heat storage body, a heat exchanger, an absorption heat pump unit, a first group of heat users and a second group of heat users; The heat source is connected to the first group of heat users through a water supply pipeline and a water return pipeline, and the water supply pipeline is connected to the heat storage body through a heat storage water supply pipeline, and the water return pipeline is connected to the heat storage body through a heat storage water return pipeline, and the heat storage water supply pipeline and the heat storage water return pipeline are both provided with a second switch valve; The heat storage body, heat exchanger and absorption heat pump unit are connected between the heat source and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is less than the heating capacity of the heat source, the heat source provides heat to the heat storage body, the first group of heat users and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is greater than the heating capacity of the heat source, the heat source provides heat to the first group of heat users, and the heat storage body, heat exchanger and absorption heat pump unit provide heat to the second group of heat users.

9. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 8, characterized in that: The heat storage body outlet pipe and the heat storage body inlet pipe are both connected between the heat storage body and the absorption heat pump unit, and a switch valve four is provided on the heat storage body outlet pipe. After the switch valve four is connected, the hot water of the heat storage body first enters the generator of the absorption heat pump unit, enters the heat release side of the heat exchanger for cooling, and then enters the evaporator of the absorption heat pump unit for cooling again. The cooled low-temperature water returns to the heat storage body; when the total heat demand of the first group of heat users and the second group of heat users is greater than the heating capacity of the heat source, the hot water in the hot water storage body enters the heat exchanger and the absorption heat pump unit for cooling, and the energy generated by the cooling provides heat for the second group of heat users.

10. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 9, characterized in that: The second group of heat users is connected to the second return water pipeline and the second water supply pipeline, and the heat exchanger and the absorption heat pump unit are connected in parallel and connected between the second return water pipeline and the second water supply pipeline. Connecting pipes are connected between the second return water pipeline and the return water pipeline, and between the second water supply pipeline and the water supply pipeline, and a switch valve five is provided on the connecting pipe, and a switch valve three is provided on the second return water pipeline on the left side of the connecting pipe.

11. A heating device for storing heat in the non-heating season and providing peak load heating in the heating season according to claim 10, characterized in that: It also includes a boiler. The second water supply pipeline is provided with a switch valve three, and the boiler is connected in parallel on both sides of the switch valve three on the second water supply pipeline.

12. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 9, characterized in that: The second group of heat users is connected to the second return water pipeline and the second water supply pipeline, and the heat exchanger and the absorption heat pump unit are connected in series and connected between the second return water pipeline and the second water supply pipeline. Connecting pipes are connected between the second return water pipeline and the return water pipeline, and between the second water supply pipeline and the water supply pipeline, and a switch valve five is provided on the connecting pipe, and a switch valve three is provided on the second return water pipeline on the left side of the connecting pipe.

13. A heating device for storing heat in the non-heating season and providing peak-load heating in the heating season according to claim 12, characterized in that: It also includes a boiler. The second water supply pipeline is provided with a switch valve three, and the boiler is connected in parallel on both sides of the switch valve three on the second water supply pipeline.

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