Multi-generation system

Abstract

The utility model relates to the technical field of heating, and discloses a multi-generation system. The multi-combined supply system comprises a balanced reservoir, a hot water tank, a solar heat source, an air source heat pump and a gas water heater, and the balanced reservoir communicates with an indoor temperature adjusting unit and is used for adjusting the indoor temperature; a heat exchanger is arranged in the hot water tank, and the hot water tank communicates with a water using end and is used for users to use water; the air source heat pump can selectively communicate with the balanced reservoir or the hot water tank in a circulating mode, the gas water heater can communicate with the balanced reservoir in a circulating mode, and the solar heat source can selectively communicate with the hot water tank in a circulating mode. The heating, refrigerating and water using requirements of users can be met, and the functions are richer; meanwhile, various auxiliary heat sources are adopted and can be selected according to different use scenes and use requirements, so that the selection is more, and the energy consumption can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a multi-energy supply system. Background Art

[0002] In modern household heating systems, there are many products commonly used for heating, such as electric furnaces, coal-fired boilers and gas-fired wall-mounted boilers, most of which have high energy consumption and high operating costs. With the rapid development of low-temperature variable-frequency heat pump technology, air-source heating products have gradually replaced the original products. At present, in addition to low-temperature room heating and cooling air conditioners, there are also heat pumps for room heating, especially air source heat pump heating products, which are accepted by people because of their high comfort, environmental protection and energy saving.

[0003] In the prior art, modern household heating systems have the following problems: the product has few operating functions and can only meet single or two usage functions, namely heating in winter or cooling in summer; the auxiliary heat source is single, and when the temperature is low and the heat output of the heat pump is insufficient, it can only be supplemented by traditional electric heating, which has little selectivity and high energy consumption.

[0004] Therefore, there is an urgent need for a multi-generation system to solve the above problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a multi-energy supply system, which can effectively solve the problems of single function, few auxiliary heat source options and high energy consumption in the prior art, and can meet the user's heating, cooling and water use needs, with richer functions; at the same time, a variety of auxiliary heat sources are adopted, which can be selected according to different usage scenarios and usage needs, which not only has more choices but also helps to reduce energy consumption.

[0006] The above technical problems are solved by the following technical solutions:

[0007] A multi-energy supply system, comprising:

[0008] A balancing water tank, the balancing water tank is cyclically connected to the indoor temperature regulating unit and is used to regulate the indoor temperature;

[0009] A hot water tank, in which a heat exchanger is arranged, the hot water tank is connected to the water-using end for users to use water;

[0010] An air source heat pump and a gas water heater, wherein the air source heat pump can selectively be connected to the balancing water tank or the hot water tank in a circulating manner, and the gas water heater can be connected to the balancing water tank in a circulating manner.

[0011] A solar heat source is selectively connected to the hot water tank in a circulation manner.

[0012] Compared with the background technology, the multi-energy supply system of the utility model has the following beneficial effects:

[0013] The balancing water tank of the utility model is connected with the indoor temperature regulating unit to adjust the indoor temperature and meet the heating and cooling needs of the user; the hot water tank is connected with the water end, and is used to supply hot water to the user through the heat exchange of the heat exchanger to meet the user's water needs; that is, the multi-generation system has more functions and can meet the various usage needs of the user. When the solar heat source can meet the heat required for heating the hot water tank, the air source heat pump can heat or cool the balancing water tank according to the indoor temperature, thereby adjusting the indoor temperature; when the solar energy cannot meet the heat required for heating the hot water tank alone, the air source heat pump cooperates with the solar heat source to heat the hot water tank. At this time, if there is a heating demand indoors, the gas water heater can intervene to heat the balancing water tank, thereby adjusting the indoor temperature. And when heating the balancing water tank, the air source heat pump is preferably used. If the air source heat pump cannot meet the heat pump required for heating the balancing water tank alone, the gas water heater can intervene in time, so that the balancing water tank is not limited to heat exchange only through the air source heat pump. That is, the present application adopts a variety of auxiliary heat sources, which can be selected according to different usage scenarios and usage requirements. Compared with the existing method of only using electric auxiliary heating, it can significantly reduce energy consumption and improve heat exchange efficiency.

[0014] In one embodiment, the polygeneration system is provided with a first three-way valve, the inlet of the first three-way valve is connected to the air source heat pump and the gas water heater, one outlet is connected to the water inlet of the balancing water tank, and the other outlet is connected to the heat exchanger;

[0015] The first three-way valve can connect the air source heat pump to the balancing water tank; or both the air source heat pump and the gas water heater are connected to the balancing water tank; or the air source heat pump is connected to the hot water tank.

[0016] In one of the embodiments, a first one-way valve is provided between the gas water heater and the first three-way valve, so that water can flow in one direction along the gas water heater and the first three-way valve.

[0017] In one embodiment, the indoor temperature adjustment unit includes a geothermal heater, a first pipeline is connected between the water inlet of the geothermal heater and the water outlet of the balancing water tank, and between the water outlet of the geothermal heater and the water inlet of the balancing water tank, and a bypass pipe is connected between the two first pipelines;

[0018] The polygeneration system further includes a valve device, through which the geothermal heater is selectively connected to the bypass pipe or the balancing water tank for circulation.

[0019] In one embodiment, the valve device is configured as a second three-way valve, and a geothermal water pump is also provided between the water inlet of the geothermal heater and the outlet of the second three-way valve, one inlet of the second three-way valve is connected to the water outlet of the balancing water tank, and the other inlet is connected to the bypass pipe.

[0020] In one of the embodiments, the indoor temperature adjustment unit includes an indoor heat exchanger, and a heat exchange water pump is provided between the indoor heat exchanger and the balancing water tank;

[0021] The indoor heat exchanger includes a dynamic heat exchange module and a static heating module arranged side by side, and the balancing water tank is selectively connected to the dynamic heat exchange module or the static heating cycle.

[0022] In one of the embodiments, the multi-energy supply system also includes a third three-way valve and a heat exchange water pump, wherein the heat exchange water pump connects the inlet of the third three-way valve with the balancing water tank, one of the outlets of the third three-way valve is connected with the inlet of the dynamic heat exchange module, and the other outlet is connected with the inlet of the static heating.

[0023] In one embodiment, the heat exchanger is provided with a heat pump water exchange pipe and a solar water exchange pipe, the hot water tank is provided with a water pipe connected to the water use end, the heat pump water exchange pipe is circulatedly connected to the air source heat pump, the solar water exchange pipe is circulatedly connected to the solar heat source, and the heat pump water exchange pipe and / or the solar water exchange pipe can exchange heat with the water pipe.

[0024] In one embodiment, a first auxiliary electric heater is provided in the balancing water tank, and / or a second auxiliary electric heater is provided in the hot water tank, and / or the air source heat pump includes an expansion water tank and a plate heat exchanger, and a third auxiliary electric heater connected in series with the plate heat exchanger.

[0025] In one of the embodiments, the multi-generation system is further provided with a control module, and the air source heat pump, the gas water heater and the solar heat source are all communicatively connected to the control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of a multi-energy supply system provided by a specific implementation mode of the utility model.

[0028] Description of labels:

[0029] 100. Balancing water tank; 110. First auxiliary electric heating;

[0030] 200, indoor temperature adjustment unit; 210, floor heater; 211, bypass pipe; 212, second three-way valve; 213, floor heat pump; 214, first pipeline; 220, indoor heat exchanger; 221, heat exchange water pump; 222, dynamic heat exchange module; 223, static heating module; 224, third three-way valve;

[0031] 300, hot water tank; 310, second auxiliary electric heating; 320, heat pump water exchange pipe; 330, solar water exchange pipe;

[0032] 400, water use end; 410, circulating water circuit; 420, hot water circulating water pump;

[0033] 500, air source heat pump; 510, first three-way valve; 520, third auxiliary electric heater; 530, main engine water pump; 540, expansion water tank; 550, plate heat exchanger;

[0034] 600, gas water heater; 610, first one-way valve;

[0035] 700. Solar thermal source; 710. Solar water pump. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In the description of the present application, it should be understood that the terms "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] like Figure 1 As shown, this embodiment provides a multi-energy supply system, which includes a balancing water tank 100, a hot water tank 300, a solar heat source 700, an air source heat pump 500 and a gas water heater 600, and the air source heat pump 500 and the gas water heater 600 are arranged in parallel with the balancing water tank 100. The balancing water tank 100 is circulated and connected with the indoor temperature adjustment unit 200 for adjusting the indoor temperature; a heat exchanger is arranged in the hot water tank 300, and the hot water tank 300 is connected with the water use end 400 for user water use; the air source heat pump 500 can be selectively circulated and connected with the balancing water tank 100 or the hot water tank 300, the gas water heater 600 can be connected with the balancing water tank 100, and the solar heat source 700 is selectively circulated and connected with the hot water tank 300.

[0041] The balancing water tank 100 is connected to the indoor temperature adjustment unit 200, and is used to adjust the indoor temperature to meet the heating and cooling needs of the user; the hot water tank 300 is connected to the water end 400, and is used to supply hot water to the user through the heat exchange of the heat exchanger to meet the user's water needs; that is, the multi-generation system has more functions and can meet the various usage needs of the user. When the solar heat source 700 can meet the heat required for heating the hot water tank 300, the air source heat pump 500 can heat or cool the balancing water tank 100 according to the indoor temperature, thereby adjusting the indoor temperature; when the solar heat source 700 cannot meet the heat required for heating the hot water tank 300 alone, the air source heat pump 500 cooperates with the solar heat source 700 to heat the hot water tank 300. At this time, if there is a heating demand indoors, the gas water heater 600 can intervene to heat the balancing water tank 100, thereby adjusting the indoor temperature. When heating the balancing water tank 100, the air source heat pump 500 is preferably used. If the air source heat pump 500 cannot meet the heat pump required for heating the balancing water tank 700 alone, the gas water heater 600 can be timely intervened, so that the balancing water tank 700 is not limited to heat exchange only through the air source heat pump 500. That is, the present application adopts a variety of auxiliary heat sources, which can be selected according to different usage scenarios and usage requirements. Compared with the existing method of only using electric auxiliary heating, it can significantly reduce energy consumption and improve heat exchange efficiency.

[0042] Specifically, the multi-generation system is provided with a first three-way valve 510, the inlet of the first three-way valve 510 is connected to the air source heat pump 500 and the gas water heater 600, one of the outlets is connected to the water inlet of the balancing water tank 100, and the other outlet is connected to the heat exchanger; the inlet of the first three-way valve 510 is port a, the outlet connected to the balancing water tank 100 is port b, and the outlet connected to the heat exchanger is port c. The first three-way valve 510 changes the opening and closing of different ports to make the air source heat pump 500 connected to the balancing water tank 100; or the air source heat pump 500 and the gas water heater 600 are both connected to the balancing water tank 100; or the air source heat pump 500 is connected to the hot water tank 300. Further, a first check valve 610 is also provided between the gas water heater 600 and the first three-way valve 510 to make water flow in one direction along the gas water heater 600 and the first three-way valve 510.

[0043] Exemplarily, when the user uses the gas water heater 600 as the first auxiliary heat source of the balancing water tank 100, if the room temperature is lower than the preset temperature, the air source heat pump 500 works for the first preset time and the temperature of the balancing water tank 100 has not reached the preset temperature, the first one-way valve 610 opens, and the a port of the first three-way valve 510 is connected to the c port, that is, the air source heat pump 500 and the gas water heater 600 are connected to the balancing water tank 100, and the air source heat pump 500 and the gas water heater 600 are used together to adjust the indoor temperature.

[0044] Furthermore, a first auxiliary electric heater 110 is provided in the balancing water tank 100. When the first three-way valve 510 connects the air source heat pump 500 and the gas water heater 600 with the balancing water tank 100 for a second preset time and the temperature of the balancing water tank 100 does not reach the preset temperature, the first auxiliary electric heater 110 is turned on. That is, the air source heat pump 500 and the first auxiliary heat source fail to adjust the indoor temperature. At this time, the first auxiliary electric heater 110 is added as the second auxiliary heat source to jointly adjust the indoor temperature to increase the adjustment efficiency.

[0045] Similarly, the hot water tank 300 is provided with a second auxiliary electric heater 310. When the user uses the solar heat source 700 as the first auxiliary heat source of the heat exchanger of the hot water tank 300, the solar heat source 700 can be started for auxiliary heating when the air source heat pump 500 cannot meet the hot water demand; if the air source heat pump 500 and the solar heat source 700 fail to meet the hot water demand, the second auxiliary electric heater 310 can be started to meet the user's water demand. Alternatively, when it is detected that the heat of the solar heat source 700 is high, the air source heat pump 500 can be stopped, and only the solar heat source 700 can be used to heat the hot water tank 300, which is conducive to energy saving and emission reduction.

[0046] In this embodiment, when the water end 400 uses hot water, the air source heat pump 500 is connected to the hot water tank 300, that is, when the user needs to use hot water, the port a and the port b of the first three-way valve 510 are connected, and the air source heat pump 500 is used to heat the hot water tank 300. Note that at this time, the first one-way valve 610 is disconnected, that is, the gas water heater 600 does not participate in the heating of the hot water tank 300.

[0047] Specifically, the indoor temperature adjustment unit 200 includes a geothermal heater 210, and a first pipeline 214 is provided between the water inlet of the geothermal heater 210 and the water inlet of the balancing water tank 100, and between the water outlet of the geothermal heater 210 and the water inlet of the balancing water tank 100, and a bypass pipe 211 is connected between the two first pipelines 214; the polygeneration system also includes a valve device, and the geothermal heater 210 is selectively circulated with the bypass pipe 211 or the balancing water tank 100 through the valve device. By providing the bypass pipe 211, the interior of the geothermal heater 210 can be circulated and heated, which is more energy-saving while ensuring the heating effect.

[0048] Exemplarily, the valve device is set as a second three-way valve 212, a geothermal water pump 213 is provided between the water inlet of the geothermal heater 210 and the outlet of the second three-way valve 212, one inlet of the second three-way valve 212 is connected to the water outlet of the balancing water tank 100, and the other inlet is connected to the bypass pipe 211. The inlet of the second three-way valve 212 connected to the water outlet of the balancing water tank 100 is the g port, the port connected to the water inlet of the geothermal heater 210 is the i port, and the port connected to the bypass pipe 211 is the h port. When the user needs the geothermal heater 210 for heating, the geothermal water pump 213 is started after the balancing water tank 100 is heated by the air source heat pump 500 or other auxiliary heat sources, and the g port of the second three-way valve 212 is connected to the i port, and the geothermal water pump 213 injects hot water into the geothermal pipe of the indoor geothermal heater 210 for heating the room; when the temperature of the geothermal heater 210 meets the heating temperature, the i port and the h port of the second three-way valve 212 are connected, and the interior of the geothermal heater 210 can be circulated for heating.

[0049] Furthermore, the indoor temperature adjustment unit 200 includes an indoor heat exchanger 220, and a heat exchange water pump 221 is arranged between the indoor heat exchanger 220 and the balancing water tank 100; the indoor heat exchanger 220 includes a dynamic heat exchange module 222 and a static heating module 223 arranged side by side, and the balancing water tank 100 is selectively circulated and connected with the dynamic heat exchange module 222 or the static heating module 223 to selectively cool or heat the indoor room.

[0050] Optionally, the multi-energy supply system further includes a third three-way valve 224 and a heat exchange water pump 221, and the heat exchange water pump 221 is used to connect the third three-way valve 224 with the balancing water tank 100, and one of the outlets of the third three-way valve 224 is connected to the inlet of the dynamic heat exchange module 222, and the other outlet is connected to the inlet of the static heating module 223. The inlet of the third three-way valve 224 connected to the heat exchange water pump 221 is port d, the port connected to the inlet of the dynamic heat exchange module 222 is port e, and the port connected to the inlet of the static heating module 223 is port f. The dynamic heat exchange module 222 is used for indoor cooling and heating. When the user has a cooling demand, the room must be equipped with a dynamic heat exchange module 222; the static heating module 223 is used for indoor static heat release heating. By setting the third three-way valve 224, the dynamic heat exchange module 222 and the static heating module 223 cannot operate at the same time.

[0051] Specifically, when the user has a cooling / heating demand, the balancing water tank 100 is cooled / heated by the air source heat pump 500, and the heat exchange water pump 221 is started, the d port and the e port of the third three-way valve 224 are connected, and the heat exchange water pump 221 injects cold water / hot water into the coil of the dynamic heat exchange module 222, and realizes dynamic continuous cooling / heating in the room under the action of the fan. When the user has a heating demand, the balancing water tank 100 is heated by the air source heat pump 500 or other auxiliary heat sources, and the heat exchange water pump 221 is also started, the d port and the f port of the third three-way valve 224 are connected, and the heat exchange water pump 221 can inject hot water into the heat dissipation component of the static heating module 223 for static heating in the room.

[0052] In one embodiment, a heat pump water exchange pipe 320 and a solar water exchange pipe 330 are provided in the heat exchanger, a water pipe connected to the water end 400 is provided in the hot water tank 300, the heat pump water exchange pipe 320 and the air source heat pump 500 are circulated and connected, and the solar water exchange pipe 330 and the solar heat source 700 are circulated and connected. By providing the heat pump water exchange pipe 320 and / or the solar water exchange pipe 330 to exchange heat with the water pipe, domestic water is separated from heating water, effectively reducing the pollution of the user's water end 400, ensuring the water quality, and benefiting the user's health. At the same time, the heat pump water exchange pipe 320 and the solar water exchange pipe 330 are also separately provided, which is convenient for separate control and reduces the mutual influence when using different heat sources.

[0053] Furthermore, the polygeneration system further includes a solar water pump 710, which is disposed between the solar heat source 700 and the heat pump water exchange pipe 320. When the user needs to use hot water and needs to use the solar heat source 700 to heat the hot water tank 300, the solar water pump 710 is turned on and starts to circulate the hot water heated by the solar heat source 700 to the heat pump water exchange pipe 320 for heating until the hot water tank 300 reaches the temperature, and then the solar water pump 710 stops running.

[0054] Preferably, when the user end is equipped with a circulating water circuit 410 due to a long pipeline, hot water can be obtained at any time by turning on the tap. The multi-energy supply system also includes a hot water circulating water pump 420. When the temperature of the circulating water circuit 410 is lower than a certain set value, for example, the set value is 37 degrees, the hot water circulating water pump 420 is started until the water temperature of the circulating water circuit 410 reaches the set value, and the hot water pump stops running.

[0055] Exemplarily, the air source heat pump 500 includes an expansion water tank 540, a plate heat exchanger 550 and a main water pump 530. When the heat exchanger of the balancing water tank 100 or the hot water tank 300 has a heating demand, the main water pump 530 starts and the air source heat pump 500 works. When the balancing water tank 100 or the hot water tank 300 reaches the set temperature, the main water pump 530 stops running.

[0056] In one embodiment, the air source heat pump 500 also includes a third auxiliary electric heater 520 arranged in series with the plate heat exchanger 550. By setting the third auxiliary electric heater 520, the third auxiliary electric heater 520 can be started when the user needs it to assist the air source heat pump 500 in heating, cooling or using hot water.

[0057] Specifically, the multi-generation system is also provided with a control module, and the air source heat pump 500 is provided with a main control machine. The main control machine, the gas water heater 600, the first auxiliary electric heating 110, the second auxiliary electric heating 310, the third auxiliary electric heating 520 and the solar heat source 700 are all connected to the control module in communication. It is understandable that regarding the selection of the preferred start-up sequence of the auxiliary heat sources, the user can set it according to the needs, and the air source heat pump 500 is always used as the main heating, and other auxiliary heat sources are used as a match. It has high flexibility and many usage scenarios, which can not only meet the usage habits of more users, but also optimize energy configuration, reduce energy consumption and reduce costs. It is understandable that the above-mentioned auxiliary heat sources can only be turned on for heating when the user has a heating demand and the conditions for turning on each of them must be met; when the user has a cooling demand, the auxiliary heat source is in a prohibited state.

[0058] Exemplarily, the multi-generation system has a heating mode, a cooling mode, and an automatic mode. In the heating mode, if the user does not need hot water, the port a of the first three-way valve 510 is connected to the port c, which is used to heat the balancing water tank 100 to heat the room; when the user needs hot water and hot water is prioritized, the port a of the first three-way valve 510 is connected to the port b, first ensuring that the temperature of the hot water tank 300 meets the water demand, and then connecting the port a to the port c for heating until the heating temperature is met and then shutting down; when the user needs hot water but heating is prioritized, the port a of the first three-way valve 510 is connected to the port c for indoor heating until the heating temperature is met and then connecting the port a to the port b for heating the hot water tank 300 until the temperature of the hot water tank 300 meets the water demand and shutting down.

[0059] In cooling mode, if the user has no need for hot water, port a of the first three-way valve 510 is connected to port c, which is used to cool the balancing water tank 100 to cool the indoor room; when the user needs hot water and hot water is prioritized, port a of the first three-way valve 510 is connected to port b, first ensuring that the temperature of the hot water tank 300 meets the water demand, and then connecting port a to port c for cooling until the cooling temperature is met and the system is shut down; when the user needs hot water but cooling is prioritized, port a of the first three-way valve 510 is connected to port c for indoor cooling until the cooling temperature is met and then connecting port a to port b for heating the hot water tank 300 until the temperature of the hot water tank 300 meets the water demand and the system is shut down.

[0060] In automatic mode, the CPG system automatically switches between heating, cooling and hot water modes. The user can determine the operating mode of the CPG system based on the ambient temperature. When it is judged to be heating mode, the CPG system enters normal heating mode; when it is judged to be cooling mode, the CPG system enters cooling mode. The system automatically determines the entire process and no user operation is required.

[0061] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A multi-generation system, characterized in that: include: A balancing water tank (100), the balancing water tank (100) being cyclically connected to an indoor temperature regulating unit (200) for regulating indoor temperature; A hot water tank (300) is provided with a heat exchanger therein, and the hot water tank (300) is connected to a water use end (400) for users to use water; An air source heat pump (500) and a gas water heater (600), wherein the air source heat pump (500) can be selectively connected to the balancing water tank (100) or the hot water tank (300) in a circulation manner, and the gas water heater (600) can be connected to the balancing water tank (100) in a circulation manner. The solar heat source (700) is selectively connected to the hot water tank (300) in a circulation manner.

2. The polygeneration system according to claim 1, characterized in that: The polygeneration system is provided with a first three-way valve (510), an inlet of the first three-way valve (510) is connected to the air source heat pump (500) and the gas water heater (600), one outlet is connected to the water inlet of the balancing water tank (100), and the other outlet is connected to the heat exchanger; The first three-way valve (510) can enable the air source heat pump (500) to be connected to the balancing water tank (100); or the air source heat pump (500) and the gas water heater (600) to be connected to the balancing water tank (100); or the air source heat pump (500) to be connected to the hot water tank (300).

3. The polygeneration system according to claim 2, characterized in that: A first one-way valve (610) is provided between the gas water heater (600) and the first three-way valve (510) to allow water to flow in one direction along the gas water heater (600) and the first three-way valve (510).

4. The polygeneration system according to claim 1, characterized in that: The indoor temperature adjustment unit (200) comprises a geothermal heater (210), a first pipeline (214) is connected between a water inlet of the geothermal heater (210) and a water outlet of the balancing water tank (100), and between a water outlet of the geothermal heater (210) and a water inlet of the balancing water tank (100), and a bypass pipe (211) is connected between the two first pipelines (214); The polygeneration system further comprises a valve device, through which the geothermal heater (210) is selectively cyclically connected with the bypass pipe (211) or the balancing water tank (100).

5. The polygeneration system according to claim 4, characterized in that: The valve device is configured as a second three-way valve (212), and a geothermal water pump (213) is further provided between the water inlet of the geothermal heater (210) and the outlet of the second three-way valve (212), one inlet of the second three-way valve (212) is connected to the water outlet of the balancing water tank (100), and the other inlet is connected to the bypass pipe (211).

6. The polygeneration system according to claim 1, characterized in that: The indoor temperature adjustment unit (200) comprises an indoor heat exchanger (220), and a heat exchange water pump (221) is provided between the indoor heat exchanger (220) and the balancing water tank (100); The indoor heat exchanger (220) comprises a dynamic heat exchange module (222) and a static heating module (223) arranged side by side, and the balancing water tank (100) is selectively cyclically connected to the dynamic heat exchange module (222) or the static heating module (223).

7. The polygeneration system according to claim 6, characterized in that: The multi-energy supply system further comprises a third three-way valve (224) and a heat exchange water pump (221), wherein the heat exchange water pump (221) is connected to the inlet of the third three-way valve (224) and the balancing water tank (100), and one of the outlets of the third three-way valve (224) is connected to the inlet of the dynamic heat exchange module (222), and the other outlet is connected to the inlet of the static heating module (223).

8. The polygeneration system according to claim 1, characterized in that: The heat exchanger is provided with a heat pump water exchange pipe (320) and a solar water exchange pipe (330); the hot water tank (300) is provided with a water pipe connected to the water use end (400); the heat pump water exchange pipe (320) and the air source heat pump (500) are in circulation communication; the solar water exchange pipe (330) and the solar heat source (700) are in circulation communication; the heat pump water exchange pipe (320) and / or the solar water exchange pipe (330) can exchange heat with the water pipe.

9. The polygeneration system according to claim 1, characterized in that: The balancing water tank (100) is provided with a first auxiliary electric heater (110), and / or the hot water tank (300) is provided with a second auxiliary electric heater (310), and / or the air source heat pump (500) includes an expansion water tank (540) and a plate heat exchanger (550), and a third auxiliary electric heater (520) connected in series with the plate heat exchanger (550).

10. The polygeneration system according to claim 1, characterized in that: The multi-generation system is also provided with a control module, and the air source heat pump (500), the gas water heater (600) and the solar heat source (700) are all communicatively connected to the control module.

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