Upper water outlet ground source heat pump system with passive refrigeration function

Abstract

The utility model relates to an upper water outlet ground source heat pump system with a passive refrigeration function. The utility model relates to an upper water outlet ground source heat pump system with passive refrigeration, which comprises a first heat exchange module, a second heat exchange module, an upper water outlet module and a lower water outlet module, the second heat exchange module is provided with a third heat exchanger; the first heat exchanger and the second heat exchanger are arranged on the ground source side water path in parallel; and the first heat exchanger and the third heat exchanger are arranged on the use side water path in series. According to the upper water outlet ground source heat pump system with the passive refrigeration function, the second heat exchanger in the first heat exchange module and the third heat exchanger in the second heat exchange module are arranged in parallel, so that the number of water inlets and water outlets is reduced, connection of water inlet and outlet pipelines on the ground source side and the use side is simplified, and the load of a water system is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of heat pump, in particular to a kind of upper water outlet ground source heat pump system with passive refrigeration. BACKGROUND

[0002] Ground source heat pump is a kind of high-efficiency energy-saving air conditioning system using underground shallow geothermal resources (also known as shallow ground energy, including soil, underground water, etc.) for heating and refrigeration. It mainly exchanges heat with soil and other media through underground buried pipe heat exchanger to realize the transfer of heat in buildings. In winter, it can extract the heat from the ground to supply indoor for heating; In summer, it can also transfer the heat in the room to the ground, playing a role in refrigeration. In passive refrigeration mode, the relatively stable low temperature of underground shallow layer is used to drive the refrigerant to circulate between indoor heat exchanger and buried pipe heat exchanger through circulating pump, so as to transfer the heat in the building to the ground, thereby reducing the indoor temperature, without starting the heat pump host, and the energy-saving effect is remarkable.

[0003] The current upper water outlet ground source heat pump system is provided with two pairs of water inlet and outlet on the ground source side and the use side. When the upper water outlet ground source heat pump system needs to have passive refrigeration function, the existing way is to add a pair of water inlet and outlet for realizing passive refrigeration function, please refer to Figure 1 Under this setting mode, the water system pipeline occupies large volume, and the pipeline is complex, and the water system load is large. In cold climate conditions, more antifreeze is needed for heat pump unit, which affects the performance of heat pump unit and the load of water system. UTILITY MODEL CONTENTS

[0004] Therefore, the purpose of the utility model is to provide an upper water outlet ground source heat pump system with passive refrigeration, which is realized by connecting the second heat exchanger in the first heat exchange module and the third heat exchanger in the second heat exchange module in parallel, so as to reduce the number of water inlet and outlet, simplify the connection of ground source side and use side water inlet and outlet pipeline, and reduce the load of water system.

[0005] An upper water outlet ground source heat pump system with passive refrigeration, comprising:

[0006] A first heat exchange module is provided with a first heat exchanger and a second heat exchanger;

[0007] A second heat exchange module is provided with a third heat exchanger;

[0008] A ground source side waterway is provided with the first heat exchanger and the second heat exchanger in parallel;

[0009] A use side waterway is provided with the first heat exchanger and the third heat exchanger in series.

[0010] Further, the passive refrigeration belt-based ground-source heat pump system further comprises:

[0011] a water path switching assembly for switching the ground-source side water path connection; the water path switching assembly comprises a first switching valve arranged at a water inlet end of the ground-source side water path; the first switching valve comprises at least a first interface, a second interface and a third interface;

[0012] a ground-source side water inlet pipe, a first ground-source side water inlet branch pipe and a second ground-source side water inlet branch pipe are arranged at the water inlet end of the ground-source side water path; a water outlet end of the ground-source side water inlet pipe is connected to the first interface; a water inlet end of the first ground-source side water inlet branch pipe is connected to the second interface, and a water outlet end thereof is connected to the second heat exchanger; a water inlet end of the second ground-source side water inlet branch pipe is connected to the third interface, and a water outlet end thereof is connected to the third heat exchanger.

[0013] Further, the water path switching assembly further comprises the second switching valve arranged at a water outlet end of the ground-source side water path; the second switching valve comprises at least a fourth interface, a fifth interface and a sixth interface;

[0014] a ground-source side water outlet pipe, a first ground-source side water outlet branch pipe and a second ground-source side water outlet branch pipe are arranged at the water outlet end of the ground-source side water path; a water inlet end of the first ground-source side water outlet branch pipe is connected to the second heat exchanger, and a water outlet end thereof is connected to the fourth interface; a water inlet end of the second ground-source side water outlet branch pipe is connected to the third heat exchanger, and a water outlet end thereof is connected to the fifth interface; a water inlet end of the ground-source side water outlet pipe is connected to the sixth interface.

[0015] Further, the second heat exchanger is provided with a first ground-source water passage and a first refrigerant passage for heat exchange; a water inlet end of the first ground-source water passage is connected to the first ground-source side water inlet branch pipe, and a water outlet end thereof is connected to the first ground-source side water outlet branch pipe; the first refrigerant passage is arranged on a refrigerant circulation loop of the first heat exchange module.

[0016] Further, the third heat exchanger is provided with a second ground-source water passage; one end of the second ground-source water passage is connected to the second ground-source side water inlet branch pipe, and the other end thereof is connected to the second ground-source side water outlet branch pipe.

[0017] Further, the use side water path is provided with a use side water inlet pipe and a use side water outlet pipe; a water inlet end of the first heat exchanger or the third heat exchanger is connected to the use side water inlet pipe.

[0018] Further, the third heat exchanger is further provided with a first use water passage for heat exchange with the second ground-source water passage; a water inlet end of the first use water passage is connected to the use side water inlet pipe.

[0019] Further, the first heat exchanger is provided with a second water passage for heat exchange and a second refrigerant passage, one end of the second water passage is connected to the first water passage, and the other end is connected to the water outlet pipe on the use side;

[0020] The second refrigerant passage is arranged on the refrigerant circulation loop of the first heat exchange module.

[0021] Further, the water inlet pipe on the use side is provided with a water pump on the use side, which is used for pumping water into the water passage on the use side.

[0022] Further, the water inlet pipe on the ground source side is provided with a water pump on the ground source side, which is used for pumping water into the water passage on the ground source side.

[0023] The beneficial effects of the utility model lie in:

[0024] (1) by parallelly arranging the second heat exchanger in the first heat exchange module and the third heat exchanger in the second heat exchange module, the number of water inlet and outlet on the ground source side is reduced, the connection of the pipeline on the water inlet and outlet end on the ground source side is simplified, and the load of the water system is reduced;

[0025] (2) by serially arranging the first heat exchanger in the first heat exchange module and the third heat exchanger in the second heat exchange module, the connection of the pipeline on the water inlet and outlet end on the use side is simplified, the space occupied by the water system pipeline is reduced, the overall size is effectively reduced, the pipeline is beautiful and simple, the production and installation are facilitated, and the production efficiency is improved;

[0026] (3) by synchronously switching the first switch valve and the second switch valve, the switching of the water passage on the ground source side is realized, the water passage design is simplified, and the operation is facilitated;

[0027] (4) by optimizing the water passage on the ground source side and the water passage on the use side, the load of the water system can be reduced, the antifreeze required for the operation of the heat pump system can be reduced under extreme working conditions, and the operation stability of the heat pump system is improved.

[0028] In order to better understand and implement, the utility model is described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of an upper outlet water type ground source heat pump system with passive refrigeration function in the prior art;

[0030] Figure 2 It is a heating mode schematic diagram of an upper outlet water type ground source heat pump system provided by the embodiment of the application;

[0031] Figure 3 It is a passive refrigeration mode schematic diagram of an upper outlet water type ground source heat pump system provided by the embodiment of the application.

[0032] In the figure: 10-ground source side water path; 11-ground source side water inlet pipe; 111-ground source side water pump; 12-first ground source side water inlet branch pipe; 13-second ground source side water inlet branch pipe; 14-first ground source side water outlet branch pipe; 15-second ground source side water outlet branch pipe; 16-ground source side water outlet pipe; 20-use side water path; 21-use side water inlet pipe; 211-use side water pump; 22-use side water outlet pipe; 23-use side water inlet branch; 24-use side water outlet branch; 30-first heat exchange module; 31-first heat exchanger; 32-second heat exchanger; 33-compressor; 34-expansion valve; 40-second heat exchange module; 41-third heat exchanger; 51-first switch valve; 511-first interface; 512-second interface; 513-third interface; 52-second switch valve; 521-fourth interface; 522-fifth interface; 523-sixth interface; 60-third water path; 61-third water inlet pipe; 62-third water outlet pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "vertical direction", "upper", "lower", "horizontal" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be connected through an intermediate medium, it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The upper water outlet type ground source heat pump has two pairs of water inlet and outlet ports. If the upper water outlet type ground source heat pump has a passive refrigeration function, the existing method is to additionally increase a pair of water inlet and outlet ports for realizing the passive refrigeration function. Meanwhile, the use side water path 20 needs to be provided with a branch to realize the switching of the use water path.

[0037] Please refer to Figure 1 In the existing upper water outlet type ground source heat pump system, the passive refrigeration function is usually realized by additionally increasing a third water path 60 and a use side water path 20 for heat exchange. When the system is in a heating mode, the compressor 33 works, the ground source side water path 10 exchanges heat with the use side water path 20 through the first heat exchange module 30 to realize heating. When the system is switched to a passive refrigeration mode, the compressor 33 stops working, the ground source side water path 10 does not work, and the third water path 60 works to exchange heat with the use side water path 20 through the second heat exchange module 40 to realize passive refrigeration.

[0038] Specifically, the third water path 60 is provided with a third water inlet pipe 61 and a third water outlet pipe 62; the third heat exchanger 41 is provided with a second ground source water passage and a first use water passage for heat exchange, and the third water inlet pipe 61 and the third water outlet pipe 62 are respectively connected to two ends of the second ground source water passage. The water inlet pipe of the use side water path 20 needs to be provided with a use side water inlet branch 23 and a use side water outlet branch 24, and the use side water inlet branch 23 and the use side water outlet branch 24 are respectively connected to two ends of the first use water passage, so as to realize passive refrigeration. In this arrangement, the water system pipe occupies a large volume, the pipe is complex, and the water system load is large. In cold weather conditions, more antifreeze is required for the heat pump unit, which affects the performance of the heat pump unit and the load of the water system.

[0039] Based on this, the embodiment of the present application provides an upper water outlet type ground source heat pump system with passive refrigeration, which realizes parallel connection of the second heat exchanger 32 in the first heat exchange module 30 and the third heat exchanger 41 in the second heat exchange module 40, so as to reduce the number of water inlets and outlets, simplify the connection of the ground source side water inlet and outlet pipes, and reduce the load of the water system.

[0040] Please refer to Figure 2 and Figure 3 The embodiment of the present application provides an upper water outlet type ground source heat pump system with passive refrigeration, which includes a first heat exchange module 30, a second heat exchange module 40, a ground source side water path 10 and a use side water path 20. When the ground source side water path 10 and the use side water path 20 are connected to the first heat exchange module 30 at the same time, the ground source side water path 10 and the use side water path 20 exchange heat in the first heat exchange module 30 to realize heating. When the ground source side water path 10 and the use side water path 20 are connected to the second heat exchange module 40 at the same time, the ground source side water path 10 and the use side water path 20 exchange heat in the second heat exchange module 40 to realize passive refrigeration.

[0041] Specifically, the first heat exchange module 30 is provided with a first heat exchanger 31 and a second heat exchanger 32; the second heat exchange module 40 is provided with a third heat exchanger 41. The first heat exchanger 31 and the second heat exchanger 32 are arranged in parallel on the ground source side water circuit 10; the first heat exchanger 31 and the third heat exchanger 41 are arranged in series on the use side water circuit 20. In the heating mode, the ground source side water circuit 10 is connected to the second heat exchanger 32, and the first heat exchanger 31 in the first heat exchange module 30 exchanges heat with the use side water circuit 20, realizing heating of the use water. In the passive refrigeration mode, the ground source side water circuit 10 is switched to connect to the third heat exchanger 41, and the third heat exchanger 41 exchanges heat with the use side water circuit 20, realizing passive refrigeration. In this arrangement, the space occupied by the water system pipeline of the upper water outlet ground source heat pump system with passive refrigeration is smaller, effectively reducing the size of the whole machine, making the pipeline beautiful and simple, facilitating production and installation, and improving production efficiency. In addition, in this arrangement, the water system load is reduced, and in the extreme working condition of zero temperature, the anti-freezing liquid required for the operation of the heat pump system is reduced, and the stability of the heat pump system is higher.

[0042] Further, in some embodiments, the upper water outlet ground source heat pump system with passive refrigeration further comprises a water circuit switching assembly for switching the connection of the ground source side water circuit 10. The water circuit switching assembly comprises a first switching valve 51 arranged at the water inlet end of the ground source side water circuit 10, and the first switching valve 51 comprises at least a first interface 511, a second interface 512 and a third interface 513. As an example, the first switching valve 51 can be a three-way valve, and the first interface 511, the second interface 512 and the third interface 513 are respectively arranged to control the opening and closing of the corresponding interfaces by water valves; the water valve at the first interface 511 is always open; when the electric signal is 0, the water valve at the third interface 513 is closed, the water valve at the second interface 512 is opened, and the first interface 511 and the second interface 512 are connected to form a path; when the electric signal is 1, the water valve at the second interface 512 is closed, the water valve at the third interface 513 is opened, and the first interface 511 and the third interface 513 are connected to form a path, thereby realizing the switching of the water circuit.

[0043] Further, the water inlet end of the ground source side water path 10 is provided with a ground source side water inlet pipe 11, a first ground source side water inlet branch pipe 12 and a second ground source side water inlet branch pipe 13; the water outlet end of the ground source side water inlet pipe 11 is connected to the first interface 511, the water inlet end of the first ground source side water inlet branch pipe 12 is connected to the second interface 512, and the water outlet end thereof is connected to the second heat exchanger 32; the water inlet end of the second ground source side water inlet branch pipe 13 is connected to the third interface 513, and the water outlet end thereof is connected to the third heat exchanger 41. In the heating mode, the water valve at the third interface 513 is closed, the water valve at the second interface 512 is opened, the first interface 511 and the second interface 512 are connected, and the ground source side water path 10 is connected to the second heat exchanger 32. In the passive refrigeration mode, the water valve at the second interface 512 is closed, the water valve at the third interface 513 is opened, the first interface 511 and the third interface 513 are connected, and the ground source side water path 10 is connected to the third heat exchanger 41.

[0044] Further, in some embodiments, the water path switching assembly further comprises a second switching valve 52 provided at the water outlet end of the ground source side water path 10, and the second switching valve 52 comprises at least a fourth interface 521, a fifth interface 522 and a sixth interface 523. As an example, the second switching valve 52 can be a three-way valve, and the fourth interface 521, the fifth interface 522 and the sixth interface 523 are respectively provided with water valves to control the opening and closing of the corresponding interfaces. The water valve at the sixth interface 523 is always opened, when the electrical signal is 0, the water valve at the fourth interface 521 is opened, the water valve at the fifth interface 522 is closed, the fourth interface 521 and the sixth interface 523 are connected to form a path; when the electrical signal is 1, the water valve at the fourth interface 521 is closed, the water valve at the fifth interface 522 is opened, the fifth interface 522 and the sixth interface 523 are connected to form a path, thereby realizing the switching of the water path.

[0045] Further, the water outlet end of the ground source side water path 10 is provided with a ground source side water outlet pipe 16, a first ground source side water outlet branch pipe 14 and a second ground source side water outlet branch pipe 15; the water inlet end of the first ground source side water outlet branch pipe 14 is connected to the second heat exchanger 32, and the water outlet end thereof is connected to the fourth interface 521; the water inlet end of the second ground source side water outlet branch pipe 15 is connected to the third heat exchanger 41, and the water outlet end thereof is connected to the fifth interface 522; the water inlet end of the ground source side water outlet pipe 16 is connected to the sixth interface 523. In the heating mode, the water valve at the fifth interface 522 is closed, the water valve at the fourth interface 521 is opened, the fourth interface 521 and the sixth interface 523 are connected, and the water flow exchanged by the second heat exchanger 32 is returned to the ground source side water outlet pipe 16. In the passive refrigeration mode, the water valve at the fourth interface 521 is closed, the water valve at the fifth interface 522 is opened, the fifth interface 522 and the sixth interface 523 are connected, and the water flow exchanged by the third heat exchanger 41 is returned to the ground source side water outlet pipe 16.

[0046] Further, in some embodiments, the first heat exchange module 30 further comprises a compressor 33 and an expansion valve 34, forming a closed refrigerant circulation loop with the first heat exchanger 31 and the second heat exchanger 32. In the heating mode, the compressor 33 works, and the first heat exchanger 31 and the second heat exchanger 32 can be used for heat exchange; in the passive refrigeration mode, the compressor 33 does not work, and the first heat exchanger 31 and the second heat exchanger 32 do not participate in heat exchange, and the first heat exchanger 31 only serves as a water flow path.

[0047] Further, the second heat exchanger 32 is provided with a first ground source water passage and a first refrigerant passage for heat exchange, the water inlet end of the first ground source water passage is connected to the first ground source side water inlet branch pipe 12, and the water outlet end is connected to the first ground source side water outlet branch pipe 14. The first refrigerant passage is provided on the refrigerant circulation loop of the first heat exchange module 30, and the two ends are respectively connected to the compressor 33 and the expansion valve 34.

[0048] Further, in some embodiments, the use side waterway 20 is provided with a use side water inlet pipe 21 and a use side water outlet pipe 22, and the water inlet end of one of the first heat exchanger 31 or the third heat exchanger 41 is connected to the use side water inlet pipe 21, and the water outlet end of the other is connected to the use side water outlet pipe 22. As an example, in the embodiments of the present application, the third heat exchanger 41 is connected to the use side water inlet pipe 21, and the first heat exchanger 31 is connected to the use side water outlet pipe 22.

[0049] Further, the third heat exchanger 41 is provided with a second ground source water passage and a first use water passage for heat exchange; one end of the second ground source water passage is connected to the second ground source side water inlet branch pipe 13, and the other end is connected to the second ground source side water outlet branch pipe 15. The water inlet end of the first use water passage is connected to the use side water inlet pipe 21.

[0050] Further, the first heat exchanger 31 is provided with a second use water passage and a second refrigerant passage for heat exchange, one end of the second use water passage is connected to the first use water passage through a connecting pipe, and the other end is connected to the use side water outlet pipe 22. The two ends of the second refrigerant passage are respectively connected to the compressor 33 and the expansion valve 34. The use water enters the use side waterway 20 through the use side water inlet pipe 21, then flows through the first use water passage and the second use water passage in turn, and then flows out through the use side water outlet pipe 22. In the heating mode, the use water exchanges heat with the second refrigerant passage when flowing through the second use water passage, achieving heating. In the passive refrigeration mode, the use water exchanges heat with the second ground source water passage when flowing through the first use water passage, achieving passive refrigeration.

[0051] Further, in some embodiments, the use side water inlet pipe 21 is provided with a use side water pump 211 for pumping use water into the use side waterway 20. The ground source side water inlet pipe 11 is provided with a ground source side water pump 111 for pumping ground source water into the ground source side waterway 10.

[0052] Referring to Figure 2 The embodiment of the present application provides a passive refrigeration upper water outlet ground source heat pump system, in the heating mode, the compressor 33 works, the ground source water is pumped into the ground source side water inlet pipe 11 to the first switching valve 51 through the ground source side water pump 111, enters the first ground source side water inlet branch pipe 12 from the second interface 512, then enters the second heat exchanger 32, exchanges heat with the first refrigerant passage in the first ground source water passage, and then flows out through the first ground source side water outlet branch pipe 14, and then enters the ground source side water outlet pipe 16 through the second switching valve 52 to return.

[0053] Referring to Figure 3 The embodiment of the present application provides a passive refrigeration upper water outlet ground source heat pump system, in the heating mode, the compressor 33 works, the ground source water is pumped into the ground source side water inlet pipe 11 to the first switching valve 51 through the ground source side water pump 111, enters the first ground source side water inlet branch pipe 12 from the second interface 512, then enters the second heat exchanger 32, exchanges heat with the first refrigerant passage in the first ground source water passage, and then flows out through the first ground source side water outlet branch pipe 14, and then enters the ground source side water outlet pipe 16 through the second switching valve 52 to return.

[0054] Compared with the prior art, the embodiment of the present application provides a passive refrigeration upper water outlet ground source heat pump system, which has the following beneficial effects:

[0055] (1) By connecting the second heat exchanger in the first heat exchange module and the third heat exchanger in the second heat exchange module in parallel, the number of ground source side water inlets and outlets is reduced, the connection of the ground source side water inlet and outlet pipes is simplified, and the load of the water system is reduced;

[0056] (2) By connecting the first heat exchanger in the first heat exchange module and the third heat exchanger in the second heat exchange module in series, the connection of the water inlet and outlet pipes of the use side is simplified, the space occupied by the water system pipes is reduced, the overall size is effectively reduced, the pipes are simple and beautiful, convenient for production and installation, and the production efficiency is improved;

[0057] (3) By synchronously switching the first switching valve and the second switching valve, the switching of the ground source side water circuit is realized, the water circuit design is simplified, and the operation is facilitated;

[0058] (4) By optimizing the water path on the ground source side and the water path on the use side, the load of the water system can be reduced, and in extreme working conditions, the anti-freezing liquid required for the operation of the heat pump system can be reduced, and the stability of the operation of the heat pump system can be improved.

[0059] The above-mentioned embodiments only express several embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, and the utility model also intends to include these changes and modifications.

Claims

1. A ground source heat pump system with passive refrigeration and upper water outlet, characterized in that, Comprising: a first heat exchange module (30) provided with a first heat exchanger (31) and a second heat exchanger (32); a second heat exchange module (40) provided with a third heat exchanger (41); a ground source side waterway (10), the first heat exchanger (31) and the second heat exchanger (32) are arranged in parallel on the ground source side waterway (10); a use side waterway (20), the first heat exchanger (31) and the third heat exchanger (41) are arranged in series on the use side waterway (20).

2. The upper water-out ground source heat pump system with passive refrigeration according to claim 1, characterized in that, Further comprising: a waterway switching assembly for switching the ground source side waterway (10) connection; the waterway switching assembly comprises a first switching valve (51) arranged at the water inlet end of the ground source side waterway (10), and the first switching valve (51) comprises at least a first interface (511), a second interface (512) and a third interface (513); the water inlet end of the ground source side waterway (10) is provided with a ground source side water inlet pipe (11), a first ground source side water inlet branch pipe (12) and a second ground source side water inlet branch pipe (13); the water outlet end of the ground source side water inlet pipe (11) is connected to the first interface (511), the water inlet end of the first ground source side water inlet branch pipe (12) is connected to the second interface (512), and the water outlet end thereof is connected to the second heat exchanger (32); the water inlet end of the second ground source side water inlet branch pipe (13) is connected to the third interface (513), and the water outlet end thereof is connected to the third heat exchanger (41).

3. The upper water outlet ground source heat pump system with passive refrigeration according to claim 2, characterized in that: the waterway switching assembly further comprises a second switching valve (52) arranged at the water outlet end of the ground source side waterway (10), and the second switching valve (52) comprises at least a fourth interface (521), a fifth interface (522) and a sixth interface (523); the water outlet end of the ground source side waterway (10) is provided with a ground source side water outlet pipe (16), a first ground source side water outlet branch pipe (14) and a second ground source side water outlet branch pipe (15); the water inlet end of the first ground source side water outlet branch pipe (14) is connected to the second heat exchanger (32), and the water outlet end thereof is connected to the fourth interface (521); the water inlet end of the second ground source side water outlet branch pipe (15) is connected to the third heat exchanger (41), and the water outlet end thereof is connected to the fifth interface (522); the water inlet end of the ground source side water outlet pipe (16) is connected to the sixth interface (523).

4. The upper water outlet ground source heat pump system with passive refrigeration according to claim 3, characterized in that: the second heat exchanger (32) is provided with a first ground water passage and a first refrigerant passage for heat exchange; the water inlet end of the first ground water passage is connected to the first ground source side water inlet branch pipe (12), and the water outlet end thereof is connected to the first ground source side water outlet branch pipe (14); the first refrigerant passage is arranged on the refrigerant circulation loop of the first heat exchange module (30).

5. The upper water outlet ground source heat pump system with passive refrigeration according to claim 3, characterized in that: The third heat exchanger (41) is provided with a second ground water passage; one end of the second ground water passage is connected with a second ground side water inlet branch pipe (13), and the other end is connected with a second ground side water outlet branch pipe (15).

6. The upper water outlet ground source heat pump system with passive refrigeration according to claim 5, characterized in that: The use side water passage (20) is provided with a use side water inlet pipe (21) and a use side water outlet pipe (22), and the water inlet end of the first heat exchanger (31) or the third heat exchanger (41) is connected with the use side water inlet pipe (21).

7. The upper water outlet ground source heat pump system with passive refrigeration according to claim 6, characterized in that: The third heat exchanger (41) is further provided with a first use water passage for heat exchange with the second ground water passage, and the water inlet end of the first use water passage is connected with the use side water inlet pipe (21).

8. The upper water outlet ground source heat pump system with passive refrigeration according to claim 7, characterized in that: The first heat exchanger (31) is provided with a second use water passage and a second refrigerant passage for heat exchange, one end of the second use water passage is connected with the first use water passage, and the other end is connected with the use side water outlet pipe (22); The second refrigerant passage is arranged on the refrigerant circulation loop of the first heat exchanger module (30).

9. The upper water outlet ground source heat pump system with passive refrigeration according to claim 6, characterized in that: The use side water inlet pipe (21) is provided with a use side water pump (211) for pumping use water into the use side water passage (20).

10. The upper water outlet ground source heat pump system with passive refrigeration according to claim 2, characterized in that: The ground side water inlet pipe (11) is provided with a ground side water pump (111) for pumping ground water into the ground side water passage (10).

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