Double-heat-source heat pump air conditioning system

Abstract

The utility model provides a double-heat-source heat pump air conditioning system. The utility model discloses a double-heat-source heat pump air-conditioning system. The air-conditioning system comprises a solar heating system, a cascade air-conditioning system, a geothermal source heating system and a user side energy supply system, wherein the solar heating system exchanges heat with the cascade air conditioning system, and the cascade air conditioning system exchanges heat with the user side energy supply system, so that heat obtained by the solar heating system is transferred to the user side energy supply system; and the geothermal source heating system exchanges heat with the cascade air conditioning system. The double-heat-source heat pump air-conditioning system can effectively improve the heat exchange efficiency of solar energy and a geothermal source, provides hot water with higher temperature for users, and meets the use requirements of the users.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a dual-heat-source heat pump air conditioning system. Background Art

[0002] As people's living standards improve, heating devices are becoming more common in every household. In order to achieve energy conservation and emission reduction, clean energy heat pumps have come into people's view. At present, the existing solar and geothermal dual-source heat pumps have low heat exchange efficiency and low heating temperature, which makes it difficult to meet users' demand for hot water. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a dual-heat source heat pump air conditioning system, which improves the heat exchange efficiency of solar energy and geothermal sources, can provide users with hot water at higher temperatures, and meet the users' usage needs.

[0004] To this end, the first object of the utility model is to provide a dual heat source heat pump air conditioning system.

[0005] To achieve the first purpose of the utility model, the technical solution of the utility model provides a dual-heat source heat pump air-conditioning system, the air-conditioning system includes: a solar heating system, a cascade air-conditioning system, a geothermal source heating system and a user-side energy supply system; wherein the solar heating system exchanges heat with the cascade air-conditioning system, and the cascade air-conditioning system exchanges heat with the user-side energy supply system, so that the heat obtained by the solar heating system is transferred to the user-side energy supply system; the geothermal source heating system exchanges heat with the cascade air-conditioning system.

[0006] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the utility model is connected to the user-side energy supply system through a cascade air conditioning system, and the cascade air conditioning system is respectively connected to the solar energy heating system and the geothermal source heating system, so that the heat of the solar energy and the geothermal source is transferred to the user-side energy supply system through the cascade air conditioning system, effectively improving the heat exchange efficiency of the solar energy and the geothermal source, making fuller use of the energy of the solar energy and the geothermal source, and increasing the heat exchange temperature more, which can meet the user's demand for hot water with a higher temperature. It can be understood that the user-side energy supply system in the utility model can provide hot water or heating for the user side.

[0007] In a technical solution of the utility model, the cascade air conditioning system includes: a first heat exchanger, the first heat exchanger has an inlet and outlet water circuit for heat exchange between the first heat exchanger and the solar heating system.

[0008] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the cascade air-conditioning system of the utility model is specifically connected to the solar heating system through the first heat exchanger, so that the solar heat obtained by the solar heating system is transferred to the first heat exchanger by using water circulation, providing more heat for the refrigerant in the first heat exchanger, so that the refrigerant evaporates more fully.

[0009] In one technical solution of the utility model, the cascade air-conditioning system includes: a second heat exchanger, the heat release end of the second heat exchanger is connected to the heat absorption end of the first heat exchanger so that the second heat exchanger and the first heat exchanger can exchange heat; a third heat exchanger, the heat release end of the third heat exchanger is connected to the heat absorption end of the second heat exchanger so that the third heat exchanger and the second heat exchanger can exchange heat; wherein the geothermal source heating system is arranged between the second heat exchanger and the third heat exchanger; the third heat exchanger has an inlet and outlet water circuit so that the third heat exchanger can exchange heat with the user-side energy supply system.

[0010] Furthermore, the cascade air-conditioning system includes: a first compressor, which is arranged between the heat release end inlet of the second heat exchanger and the heat absorption end outlet of the first heat exchanger; a first throttling device, which is arranged between the heat release end outlet of the second heat exchanger and the heat absorption end inlet of the first heat exchanger; a second compressor, which is arranged between the heat release end inlet of the third heat exchanger and the heat absorption end outlet of the second heat exchanger; and a second throttling device, which is arranged between the heat release end outlet of the third heat exchanger and the heat absorption end inlet of the second heat exchanger.

[0011] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the cascade air-conditioning system of the utility model also includes a second heat exchanger and a third heat exchanger, which is specifically connected to the user-side energy supply system through the third heat exchanger to achieve efficient heat exchange of the solar heating device; and the geothermal source heating system is arranged between the second heat exchanger and the third heat exchanger, and the temperature of the refrigerant passing through the third heat exchanger is lower, which can fully exchange heat with the geothermal source heating system, and then perform secondary heat exchange through the second heat exchanger to increase the temperature of the refrigerant, and then pass through the third heat exchanger to realize energy supply to the user side, effectively achieving a higher heating temperature. It can be understood that the cascade air-conditioning system of the utility model effectively reduces the exhaust temperature of the compressor and fully realizes the heat exchange of the refrigerant through the throttling device.

[0012] In one technical solution of the utility model, the solar heating system includes: a first solar heating panel, which is used to absorb solar energy; a first water tank, whose water outlet is connected to the first solar heating panel, and whose water inlet is connected to the inlet and outlet water circuits of the first heat exchanger; and a first water pump, which is used to drive the water in the first water tank to circulate in the solar heating system.

[0013] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the solar heating system of the utility model absorbs solar energy through the first solar heating panel, the water in the first water tank is heated by the first solar heating panel, and then the heated water is driven to the first heat exchanger for heat exchange through the first water pump, thereby realizing efficient heat exchange of solar energy.

[0014] In one technical solution of the utility model, the geothermal source heating system includes: a fourth heat exchanger, the fourth heat exchanger has an inlet and outlet water circuit for heat exchange between the geothermal source heating system and the cascade air-conditioning system; a second water pump, the second water pump is used to drive the water of the geothermal source to circulate in the geothermal source heating system through the inlet and outlet water circuits of the fourth heat exchanger; wherein the fourth heat exchanger also includes a heat absorption end, and the geothermal source heating system is connected to the second heat exchanger and the third heat exchanger through the heat absorption end of the fourth heat exchanger.

[0015] Furthermore, the second throttling device is arranged between the heat release end outlet of the third heat exchanger and the heat absorption end inlet of the fourth heat exchanger.

[0016] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the geothermal source heating system of the utility model drives the water of the geothermal source through the inlet and outlet water circuits of the fourth heat exchanger through the second water pump, and the fourth heat exchanger is connected to the second heat exchanger and the third heat exchanger to realize efficient heat exchange of the geothermal source.

[0017] In one technical solution of the utility model, the user-side energy supply system includes: a second water tank, which is connected to the inlet and outlet water circuits of the third heat exchanger; a third water pump, which is used to drive the water in the second water tank to circulate in the user-side energy supply system; and a first stop valve, which is arranged between the second water tank and the third heat exchanger.

[0018] Furthermore, the second water tank uses a heat-insulating material.

[0019] Furthermore, a temperature sensor is provided in the second water tank.

[0020] Furthermore, the user-side energy supply system also includes: a user side, which is connected to the water outlet of the second water tank; a fourth water pump, which is arranged between the user side and the water outlet of the second water tank; and a fourth stop valve, which is used to control the flow of water from the second water tank to the user side.

[0021] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the user-side energy supply system of the utility model drives the water in the second water tank to exchange heat through the third heat exchanger through the third water pump, realizes the supply of hot water at a higher temperature, and controls whether the hot water in the second water tank is transported to the third heat exchanger for heat exchange through the first stop valve. It can be understood that when the temperature of the temperature sensor in the second water tank is lower than the set temperature, the water in the water tank is controlled to exchange heat with the third heat exchanger to maintain the water tank temperature. When the water tank temperature reaches the set value, the first stop valve is closed. At this time, it is no longer necessary to exchange heat with the water in the second water tank, saving energy. When the user side needs to use hot water, it is directly obtained from the second water tank with a heat preservation function. The hot water in the second water tank is all hot water higher than the set temperature. When the temperature of the temperature sensor in the second water tank is lower than the set temperature, the water in the water tank is controlled to continue to exchange heat with the third heat exchanger, and the cycle is repeated to ensure that the user side has a continuous supply of hot water with a temperature higher than the set temperature, which effectively improves the user's experience. It can be understood that when the user does not need hot water, the fourth stop valve can be closed.

[0022] In a technical solution of the utility model, the solar heating system further comprises: a second stop valve, which is arranged between the water inlet of the first water tank and the inlet and outlet water circuits of the first heat exchanger.

[0023] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: It can be understood that when the sunlight is sufficient, the second stop valve is opened to realize the energy utilization of solar energy; when the sunlight is insufficient, the second stop valve is closed, and energy is only supplied through the geothermal source, thereby improving the energy utilization rate and realizing continuous energy supply on the user side.

[0024] In a technical solution of the utility model, the geothermal source heating system further includes: a third stop valve, which is arranged between the inlet and outlet water circuits of the fourth heat exchanger and the geothermal source.

[0025] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: It can be understood that when there is sufficient sunlight, the third stop valve is closed, and energy supply to the user side is realized only through the solar heating system; when there is insufficient sunlight, the third stop valve is opened, and energy is supplied through the geothermal source, thereby improving energy utilization and realizing continuous energy supply to the user side.

[0026] In one technical solution of the utility model, the air-conditioning system also includes: a solar electric heating system, which is arranged between the cascade air-conditioning system and the user-side energy supply system, and is used to transfer the solar energy obtained by the solar electric heating system to the user-side energy supply system in the form of electric heating.

[0027] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the utility model also includes a solar electric heating system to realize the effective storage of solar energy and improve the utilization rate of energy, and the solar electric heating system is arranged between the cascade air-conditioning system and the user-side energy supply system. When the user side needs a large amount of hot water, or the heat provided by the solar heating system and the geothermal source heating system is insufficient to meet the user's usage needs, the solar electric heating system can be used to supply energy to the user side according to the situation to meet the user's usage needs.

[0028] In one technical solution of the utility model, the solar electric heating system includes: a second solar heating panel, which is used to absorb solar energy; a battery energy storage device, which is connected to the second solar heating panel so that the solar energy absorbed by the second solar heating panel can be stored in the battery energy storage device; an electric heating device, whose electric heating belt is connected to the battery energy storage device, and the electric heating device is arranged between the cascade air-conditioning system and the user-side energy supply system.

[0029] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the solar electric heating system of the utility model specifically absorbs solar energy through the second solar heating panel and stores it in a battery energy storage device. The battery energy storage device is used to provide electrical energy when the user needs to start the electric heating device, thereby meeting the user's demand for hot water. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a dual heat source heat pump air conditioning system provided in an embodiment of the utility model.

[0031] Description of reference numerals:

[0032] 100-solar heating system; 110-first solar heating panel; 120-first water tank; 130-first water pump; 140-second stop valve; 200-cascade air conditioning system; 210-first heat exchanger; 220-second heat exchanger; 230-third heat exchanger; 240-first compressor; 250-first throttling device; 260-second compressor; 270-second throttling device; 300-geothermal heating system; 310-fourth heat exchanger; 320-second water pump; 330-third stop valve; 400-user side energy supply system; 410-second water tank; 420-third water pump; 430-first stop valve; 440-user side; 450-fourth water pump; 460-fourth stop valve; 500-solar electric heating system; 510-second solar heating panel; 520-battery energy storage device; 530-electric heating device. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and therefore, the scope of protection of the utility model is not limited by the specific embodiments disclosed below.

[0034] Refer to the following Figure 1 The technical solutions of some embodiments of the utility model are described.

[0035] Reference Figure 1 As shown, an embodiment of the utility model provides a dual-heat source heat pump air-conditioning system, the air-conditioning system comprising: a solar heating system 100, a cascade air-conditioning system 200, a geothermal source heating system 300 and a user-side energy supply system 400; wherein, the solar heating system 100 exchanges heat with the cascade air-conditioning system 200, and the cascade air-conditioning system 200 exchanges heat with the user-side energy supply system 400, so that the heat obtained by the solar heating system 100 is transferred to the user-side energy supply system 400; the geothermal source heating system 300 exchanges heat with the cascade air-conditioning system 200.

[0036] The utility model is connected to the user-side energy supply system through a cascade air conditioning system, and the cascade air conditioning system is respectively connected to the solar energy heating system and the geothermal source heating system, so that the heat of the solar energy and the geothermal source is transferred to the user-side energy supply system through the cascade air conditioning system, effectively improving the heat exchange efficiency of the solar energy and the geothermal source, making fuller use of the energy of the solar energy and the geothermal source, and increasing the heat exchange temperature more, which can meet the user's demand for hot water with a higher temperature. It can be understood that the user-side energy supply system in the utility model can provide hot water or heating for the user side.

[0037] Specifically, in the embodiment of the present invention, the cascade air conditioning system 200 includes: a first heat exchanger 210 , and the first heat exchanger 210 has an inlet and outlet water circuit for heat exchange between the first heat exchanger 210 and the solar heating system 100 .

[0038] The cascade air-conditioning system of the utility model is specifically connected to the solar heating system through the first heat exchanger, so that the solar heat obtained by the solar heating system is transferred to the first heat exchanger by using water circulation, providing more heat for the refrigerant in the first heat exchanger, so that the refrigerant evaporates more fully.

[0039] Specifically, in the embodiment of the utility model, the cascade air-conditioning system 200 includes: a second heat exchanger 220, the heat release end of the second heat exchanger 220 is connected to the heat absorption end of the first heat exchanger 210, so that the second heat exchanger 220 and the first heat exchanger 210 can exchange heat; a third heat exchanger 230, the heat release end of the third heat exchanger 230 is connected to the heat absorption end of the second heat exchanger 220, so that the third heat exchanger 230 and the second heat exchanger 220 can exchange heat; wherein, the geothermal source heating system 300 is arranged between the second heat exchanger 220 and the third heat exchanger 230; the third heat exchanger 230 has an inlet and outlet water circuit, so that the third heat exchanger 230 can exchange heat with the user-side energy supply system 400.

[0040] For example, the cascade air-conditioning system 200 includes: a first compressor 240, which is arranged between the heat release end inlet of the second heat exchanger 220 and the heat absorption end outlet of the first heat exchanger 210; a first throttling device 250, which is arranged between the heat release end outlet of the second heat exchanger 220 and the heat absorption end inlet of the first heat exchanger 210; a second compressor 260, which is arranged between the heat release end inlet of the third heat exchanger 230 and the heat absorption end outlet of the second heat exchanger 220; and a second throttling device 270, which is arranged between the heat release end outlet of the third heat exchanger 230 and the heat absorption end inlet of the second heat exchanger 220.

[0041] The cascade air conditioning system of the utility model also includes a second heat exchanger and a third heat exchanger, which is specifically connected to the user-side energy supply system through the third heat exchanger to achieve efficient heat exchange of the solar heating device; and the geothermal source heating system is arranged between the second heat exchanger and the third heat exchanger, and the temperature of the refrigerant passing through the third heat exchanger is lower, which can fully exchange heat with the geothermal source heating system, and then perform secondary heat exchange through the second heat exchanger to increase the temperature of the refrigerant, and then pass through the third heat exchanger to realize energy supply to the user side, effectively achieving a higher heating temperature. It can be understood that the cascade air conditioning system of the utility model effectively reduces the exhaust temperature of the compressor and fully realizes the heat exchange of the refrigerant through the throttling device.

[0042] Specifically, in the embodiment of the utility model, the solar heating system 100 includes: a first solar heating panel 110, the first solar heating panel 110 is used to absorb solar energy; a first water tank 120, the water outlet of the first water tank 120 is connected to the first solar heating panel 110, and the water inlet of the first water tank 120 is connected to the inlet and outlet water circuits of the first heat exchanger 210; a first water pump 130, the first water pump 130 is used to drive the water in the first water tank 120 to circulate in the solar heating system 100.

[0043] The solar heating system of the utility model absorbs solar energy through the first solar heating panel, and the water in the first water tank is heated by the first solar heating panel, and then the heated water is driven to the first heat exchanger for heat exchange through the first water pump, thereby realizing efficient heat exchange of solar energy.

[0044] Specifically, in the embodiment of the utility model, the geothermal source heating system 300 includes: a fourth heat exchanger 310, the fourth heat exchanger 310 has an inlet and outlet water circuit for heat exchange between the geothermal source heating system 300 and the cascade air-conditioning system 200; a second water pump 320, the second water pump 320 is used to drive the water of the geothermal source to circulate in the geothermal source heating system 300 through the inlet and outlet water circuits of the fourth heat exchanger 310; wherein the fourth heat exchanger 310 also includes a heat absorption end, and the geothermal source heating system 300 is connected to the second heat exchanger 220 and the third heat exchanger 230 through the heat absorption end of the fourth heat exchanger 310.

[0045] For example, the second throttling device 270 is disposed between the heat release end outlet of the third heat exchanger 230 and the heat absorption end inlet of the fourth heat exchanger 310 .

[0046] The geothermal source heating system of the utility model drives the water of the geothermal source through the inlet and outlet water circuits of the fourth heat exchanger through the second water pump. The fourth heat exchanger is connected with the second heat exchanger and the third heat exchanger to achieve efficient heat exchange of the geothermal source.

[0047] Specifically, in the embodiment of the utility model, the user-side energy supply system 400 includes: a second water tank 410, which is connected to the inlet and outlet water circuits of the third heat exchanger 230; a third water pump 420, which is used to drive the water in the second water tank 410 to circulate in the user-side energy supply system 400; and a first stop valve 430, which is arranged between the second water tank 410 and the third heat exchanger 230.

[0048] For example, the second water tank 410 uses a heat-insulating material.

[0049] For example, a temperature sensor is disposed in the second water tank 410 .

[0050] For example, the user-side energy supply system 400 also includes: a user side 440, which is connected to the water outlet of the second water tank 410; a fourth water pump 450, which is arranged between the user side 440 and the water outlet of the second water tank 410; and a fourth stop valve 460, which is used to control the flow of water from the second water tank 410 to the user side.

[0051] The user-side energy supply system of the utility model drives the water in the second water tank to exchange heat through the third heat exchanger through the third water pump, realizes the supply of hot water at a higher temperature, and controls whether the hot water in the second water tank is delivered to the third heat exchanger for heat exchange through the first stop valve. It can be understood that when the temperature of the temperature sensor in the second water tank is lower than the set temperature, the water in the water tank is controlled to exchange heat with the third heat exchanger to maintain the water tank temperature. When the water tank temperature reaches the set value, the first stop valve is closed. At this time, it is not necessary to exchange heat with the water in the second water tank, saving energy. When the user side needs to use hot water, it is directly obtained from the second water tank with a heat preservation function. The hot water in the second water tank is hot water higher than the set temperature. When the temperature of the temperature sensor in the second water tank is lower than the set temperature, the water in the water tank is controlled to continue to exchange heat with the third heat exchanger, and the cycle is repeated to ensure that the user side has a continuous supply of hot water with a temperature higher than the set temperature, which effectively improves the user's experience. It can be understood that when the user does not need hot water, the fourth stop valve can be closed.

[0052] Specifically, the solar heating system 100 in the embodiment of the utility model further includes: a second stop valve 140 , which is disposed between the water inlet of the first water tank 120 and the water inlet and outlet circuits of the first heat exchanger 210 .

[0053] It can be understood that when there is sufficient sunlight, the second stop valve is opened to realize the energy utilization of solar energy; when there is insufficient sunlight, the second stop valve is closed, and energy is only supplied through the geothermal source, thereby improving the energy utilization rate and realizing continuous energy supply on the user side.

[0054] Specifically, the geothermal source heating system 300 in the embodiment of the utility model further includes: a third stop valve 330, and the third stop valve 330 is arranged between the inlet and outlet water circuits of the fourth heat exchanger 310 and the geothermal source.

[0055] It can be understood that when there is sufficient sunlight, the third stop valve is closed and energy supply to the user side is realized only through the solar heating system; when there is insufficient sunlight, the third stop valve is opened and energy is supplied through the geothermal source, thereby improving energy utilization and realizing continuous energy supply to the user side.

[0056] Specifically, the air-conditioning system in the embodiment of the utility model also includes: a solar electric heating system 500, which is arranged between the cascade air-conditioning system 200 and the user-side energy supply system 400, and is used to transfer the solar energy obtained by the solar electric heating system 500 to the user-side energy supply system 400 in the form of electric heating.

[0057] The utility model also includes a solar electric heating system to achieve effective storage of solar energy and improve energy utilization, and the solar electric heating system is arranged between the cascade air-conditioning system and the user-side energy supply system. When the user side needs a large amount of hot water, or the heat provided by the solar heating system and the geothermal source heating system is insufficient to meet the user side's usage needs, the solar electric heating system can be used to supply energy to the user side according to the situation to meet the user's usage needs.

[0058] Specifically, in the embodiment of the utility model, the solar electric heating system 500 includes: a second solar heating panel 510, the second solar heating panel 510 is used to absorb solar energy; a battery energy storage device 520, the battery energy storage device 520 is connected to the second solar heating panel 510, so that the solar energy absorbed by the second solar heating panel 510 is stored in the battery energy storage device 520; an electric heating device 530, the electric heating belt of the electric heating device 530 is connected to the battery energy storage device 520, and the electric heating device 530 is arranged between the cascade air-conditioning system 200 and the user-side energy supply system 400.

[0059] The solar electric heating system of the utility model specifically absorbs solar energy through the second solar heating panel and stores it in a battery energy storage device. The battery energy storage device is used to provide electrical energy when the user needs to start the electric heating device to meet the user's demand for hot water.

[0060] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A dual heat source heat pump air conditioning system, characterized in that: The air conditioning system comprises: a solar heating system (100), a cascade air conditioning system (200), a geothermal heating system (300) and a user-side energy supply system (400); The solar heating system (100) performs heat exchange with the cascade air conditioning system (200), and the cascade air conditioning system (200) performs heat exchange with the user-side energy supply system (400), so that the heat obtained by the solar heating system (100) is transferred to the user-side energy supply system (400); The geothermal heating system (300) performs heat exchange with the cascade air conditioning system (200).

2. The air conditioning system according to claim 1, characterized in that: The cascade air conditioning system (200) comprises: A first heat exchanger (210), wherein the first heat exchanger (210) has an inlet and outlet water circuit for allowing the first heat exchanger (210) to exchange heat with the solar heating system (100).

3. The air conditioning system according to claim 2, characterized in that: The cascade air conditioning system (200) comprises: a second heat exchanger (220), wherein a heat release end of the second heat exchanger (220) is connected to a heat absorption end of the first heat exchanger (210), so that the second heat exchanger (220) and the first heat exchanger (210) can exchange heat; a third heat exchanger (230), wherein a heat release end of the third heat exchanger (230) is connected to a heat absorption end of the second heat exchanger (220), so that the third heat exchanger (230) and the second heat exchanger (220) can exchange heat; Wherein, the geothermal source heating system (300) is arranged between the second heat exchanger (220) and the third heat exchanger (230); The third heat exchanger (230) has an inlet and outlet water circuit for heat exchange between the third heat exchanger (230) and the user-side energy supply system (400).

4. The air conditioning system according to claim 2, characterized in that: The solar heating system (100) comprises: A first solar heating panel (110), the first solar heating panel (110) being used for absorbing solar energy; A first water tank (120), wherein a water outlet of the first water tank (120) is connected to the first solar heating panel (110), and a water inlet of the first water tank (120) is connected to an inlet and outlet water circuit of the first heat exchanger (210); A first water pump (130), wherein the first water pump (130) is used to drive the water in the first water tank (120) to circulate in the solar heating system (100).

5. The air conditioning system according to claim 3, characterized in that: The geothermal source heating system (300) comprises: a fourth heat exchanger (310), the fourth heat exchanger (310) having an inlet and outlet water circuit for heat exchange between the geothermal heating system (300) and the cascade air conditioning system (200); a second water pump (320), the second water pump (320) being used to drive water from the geothermal source to circulate in the geothermal source heating system (300) through the inlet and outlet water loops of the fourth heat exchanger (310); The fourth heat exchanger (310) further includes a heat absorption end, and the geothermal source heating system (300) is connected to the second heat exchanger (220) and the third heat exchanger (230) via the heat absorption end of the fourth heat exchanger (310).

6. The air conditioning system according to claim 3, characterized in that: The user-side energy supply system (400) comprises: a second water tank (410), the second water tank (410) being in communication with an inlet and outlet water circuit of the third heat exchanger (230); a third water pump (420), the third water pump (420) being used to drive the water in the second water tank (410) to circulate in the user-side energy supply system (400); A first stop valve (430), wherein the first stop valve (430) is disposed between the second water tank (410) and the third heat exchanger (230).

7. The air conditioning system according to claim 4, characterized in that: The solar heating system (100) further comprises: A second stop valve (140), wherein the second stop valve (140) is arranged between the water inlet of the first water tank (120) and the water inlet and outlet circuits of the first heat exchanger (210).

8. The air conditioning system according to claim 5, characterized in that: The geothermal source heating system (300) further comprises: A third stop valve (330), wherein the third stop valve (330) is provided between the inlet and outlet water circuits of the fourth heat exchanger (310) and the geothermal source.

9. The air conditioning system according to any one of claims 1 to 8, characterized in that: The air conditioning system further comprises: A solar electric heating system (500), wherein the solar electric heating system (500) is arranged between the cascade air conditioning system (200) and the user-side energy supply system (400), and is used to transfer solar energy obtained by the solar electric heating system (500) to the user-side energy supply system (400) in the form of electric heating.

10. The air conditioning system according to claim 9, characterized in that: The solar electric heating system (500) comprises: A second solar heating panel (510), wherein the second solar heating panel (510) is used to absorb solar energy; A battery energy storage device (520), the battery energy storage device (520) being connected to the second solar heating panel (510) so that the solar energy absorbed by the second solar heating panel (510) is stored in the battery energy storage device (520); An electric heating device (530), wherein the electric heating belt of the electric heating device (530) is connected to the battery energy storage device (520), and the electric heating device (530) is arranged between the cascade air conditioning system (200) and the user-side energy supply system (400).

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