Multi-area buried pipe storage and use parallel ground source heat pump system

Abstract

The utility model belongs to the technical field of renewable energy building application, and provides a multi-area buried pipe storage and use parallel ground source heat pump system. Comprising a domestic hot water heat pump unit, a cold and heat supply heat pump unit, a deep water collector, a deep water distributor, a shallow water collector, a shallow water distributor, a first switching valve group, a second switching valve group, a shallow buried pipe and a deep buried pipe. According to the ground source heat pump system, cold and heat are supplied through the shallow-layer buried pipe, domestic hot water is supplied through the deep-layer buried pipe, heat is supplemented to the deep-layer buried pipe system through the shallow-layer buried pipe in the cold supply season, and the stability and efficiency of domestic hot water supply are improved. And through combination of heat exchange of the shallow buried pipe and the deep buried pipe, conversion of heat at different times and in different scenes can be achieved, the defect problem of rock-soil body heat imbalance formed by single utilization of the shallow buried pipe is fundamentally avoided, cold and heat can be stably and efficiently supplied to a building, and domestic hot water with the needed quality can be provided.

Description

Technical Field

[0001] The utility model belongs to the technical field of renewable energy building application, and specifically relates to a multi-zone buried pipe storage and parallel ground source heat pump system. Background Art

[0002] Geothermal heat pump is a renewable energy building application technology that uses geothermal energy for cooling and heating and to provide domestic hot water, which can effectively reduce carbon emissions from building energy use.

[0003] At present, the U-shaped buried pipe ground source heat pump technology that utilizes shallow geothermal energy is mostly used, and the burial depth is basically shallower than 200m. However, in some areas, the underground water content within this depth range is relatively low, and the volume specific heat capacity of rock and soil is small, and the heat conduction speed is slow, which forms a "heat accumulation" in the underground rock and soil body over the years. Especially in areas where the demand for cold and hot loads of buildings varies greatly throughout the year, the uneven heat discharged into the underground rock and soil through the buried pipe makes it difficult for the temperature of the rock and soil to recover in time. After years of operation, it will cause temperature imbalance, affecting the surrounding ecology, and the ground source heat pump system will also decay year by year, thus affecting the normal operation of the system. Even if more shallow buried pipes are laid, the inherent defects of cold and heat imbalance cannot be solved. On the other hand, there is not enough site area to lay buried pipes in urban areas or areas with dense buildings. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a multi-zone buried pipe storage and parallel ground source heat pump system, which uses shallow buried pipes to supply cooling and heating, and deep buried pipes to supply domestic hot water. In the cooling season, shallow buried pipes are used to supplement heat to the deep buried pipe system, thereby improving the stability and efficiency of domestic hot water supply, and solving the problem of cold and heat balance in the shallow buried pipe heat exchange system.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multi-zone buried pipe storage and parallel ground source heat pump system, including a heat pump unit for domestic hot water, a heat pump unit for cooling and heating, a deep water collector, a deep water distributor, a shallow water collector, a shallow water distributor, a first switching valve group, a second switching valve group, a shallow buried pipe, and a deep buried pipe, wherein the shallow buried pipe and the deep buried pipe are buried in the same area;

[0006] The heat pump unit for domestic hot water comprises a first condenser and a first evaporator, wherein the outlet of the first condenser is connected to the inlet of the domestic hot water user end, the outlet of the domestic hot water user end is connected to the inlet of the first condenser, the outlet of the first evaporator is connected to the main inlet of the deep water distributor, the branch outlet of the deep water distributor is connected to the inlet of the deep buried pipe, the outlet of the deep buried pipe is connected to the branch outlet of the deep water collector, and the main inlet of the deep water collector is connected to the inlet of the first evaporator;

[0007] The heat pump unit for cooling and heating includes a second condenser and a second evaporator. The outlet of the second condenser is connected to the first end of the second switching valve group, the second end of the second switching valve group is connected to the main port of the shallow water distributor, some branches of the shallow water distributor are connected to the inlet of the shallow buried pipe, the outlet of the shallow buried pipe is connected to the branch port of the shallow water collector, the main port of the shallow water collector is connected to the first end of the first switching valve group, the second end of the first switching valve group is connected to the inlet of the second condenser, the outlet of the second evaporator is connected to the third end of the first switching valve group, the fourth end of the first switching valve group is connected to the inlet of the air conditioner user end, the outlet of the air conditioner user end is connected to the third end of the second switching valve group, and the fourth end of the second switching valve group is connected to the inlet of the second evaporator.

[0008] Preferably, the system also includes a shallow buried pipe for heating, the branch of the shallow water distributor is connected to the inlet of the shallow buried pipe for heating, the outlet of the shallow buried pipe for heating is connected to the branch of the shallow water collector, and the shallow buried pipe for heating and the deep buried pipe are buried in different areas.

[0009] Preferably, a water pump is provided on the pipeline connecting the domestic hot water user-end outlet and the first condenser inlet.

[0010] Preferably, a water pump is provided on the pipeline connecting the main inlet of the deep water collector and the inlet of the first evaporator.

[0011] Preferably, two parallel water pumps are provided on the pipeline connecting the main inlet of the shallow water collector with the first end of the first switching valve group.

[0012] Preferably, a water pump is provided on the pipeline connecting the air conditioner user-end outlet and the third end of the second switching valve group.

[0013] Preferably, the buried depth of the shallow buried pipe is h, where h≤200m.

[0014] Preferably, the burial depth of the deep buried pipe is H, 1800m≤H≤3000m.

[0015] Preferably, the deep buried pipe is a vertically arranged shell-and-tube heat exchanger, wherein the inner pipe and the outer pipe constitute the respective outlet and inlet.

[0016] Preferably, the shallow buried pipe is a vertically arranged U-shaped pipe, and two ends of the U-shaped pipe constitute the respective outlet and inlet.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model provides a multi-zone buried pipe storage and parallel ground source heat pump system, which uses shallow buried pipes for cooling and heating, and deep buried pipes for domestic hot water. In the cooling season, shallow buried pipes are used to supplement heat to the deep buried pipe system, thereby improving the stability and efficiency of domestic hot water supply. Moreover, through the combination of shallow buried pipes and deep buried pipes for heat exchange, the conversion of heat at different times and in different scenes is realized, fundamentally avoiding the defect problem of "rock and soil body heat imbalance" caused by the single use of shallow buried pipes, which can not only stably and efficiently provide cooling and heating for buildings, but also provide the required quality domestic hot water.

[0019] 2. The utility model provides a multi-zone buried pipe storage and parallel ground source heat pump system. By setting shallow buried pipes for heating, heat is absorbed from the rock and soil in different regions. This can avoid excessive use of heat in the rock and soil during winter heating, resulting in insufficient heat in the rock and soil near the deep buried pipes, and inability to provide stable domestic hot water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the connection structure of a multi-zone buried pipe storage and parallel ground source heat pump system provided by an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of a process flow of a multi-zone buried pipe storage and parallel ground source heat pump system for supplying domestic hot water throughout the year provided by an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of a process flow of summer air conditioning and cooling of a multi-zone buried pipe storage and parallel ground source heat pump system provided by an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the flow of winter air conditioning heating of a multi-zone buried pipe storage and parallel ground source heat pump system provided in an embodiment of the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. Heat pump unit for domestic hot water; 11. First condenser; 12. First evaporator; 2. Heat pump unit for cooling and heating; 21. Second condenser; 22. Second evaporator; 3. Domestic hot water user end; 4. Air conditioning user end; 5. Mixing zone; 51. Shallow buried pipe; 52. Deep buried pipe; 53. Shallow buried pipe for heating; 61. Deep water collector; 62. Deep water distributor; 63. Shallow water collector; 64. Shallow water distributor; 7. Shallow zone; 91. First switching valve group; 92. Second switching valve group. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with specific embodiments so that those skilled in the art can understand the present invention more clearly.

[0027] 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 integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0028] The present embodiment provides a multi-zone buried pipe storage and parallel ground source heat pump system, including a heat pump unit 1 for domestic hot water, a heat pump unit 2 for cooling and heating, a deep water collector 61, a deep water distributor 62, a shallow water collector 63, a shallow water distributor 64, a first switching valve group 91, a second switching valve group 92, a shallow buried pipe 51, and a deep buried pipe 52. The shallow buried pipe 51 and the deep buried pipe 52 are buried in the same area. For example, Figure 1 As shown, the six shallow buried pipes 51 and the two deep buried pipes 52 are all buried in the mixing zone 5, wherein the shallow buried pipes 51 are buried at a shallower position, and the deep buried pipes 52 are buried at a deeper position, and will not interfere with each other.

[0029] The domestic hot water heat pump unit 1 comprises a first condenser 11 and a first evaporator 12. The outlet of the first condenser 11 is connected to the inlet of the domestic hot water user end 3. The outlet of the domestic hot water user end 3 is connected to the inlet of the first condenser 11 to form a user-side circulation pipeline.

[0030] The outlet of the first evaporator 12 is connected to the main port of the deep water divider 62, the two branch ports of the deep water divider 62 are respectively connected to the two inlets of the deep buried pipes 52, the outlets of the two deep buried pipes 52 are respectively connected to the two branch ports of the deep water collector 61, and the main port of the deep water collector 61 is connected to the inlet of the first evaporator 12, forming a ground source side circulation pipeline.

[0031] The heat pump unit 2 for cooling and heating comprises a second condenser 21 and a second evaporator 22. The outlet of the second condenser 21 is connected to the first end of the second switching valve group 92. The second end of the second switching valve group 92 is connected to the main port of the shallow water distributor 64. The six shallow buried pipes 51 are divided into two groups. The two branch ports of the shallow water distributor 64 are respectively connected to the two groups of shallow buried pipes 51, that is, a branch port of the shallow water distributor 64 is simultaneously connected to the inlets of three shallow buried pipes 51. The outlets of the three shallow buried pipes 51 are simultaneously connected to a branch port of the shallow water collector 63. The main port of the shallow water collector 63 is connected to the first end of the first switching valve group 91. The second end of the first switching valve group 91 is connected to the inlet of the second condenser 21, forming a ground source side circulation pipeline.

[0032] The outlet of the second evaporator 22 is connected to the third end of the first switching valve group 91, the fourth end of the first switching valve group 91 is connected to the inlet of the air-conditioning user end 4, the outlet of the air-conditioning user end 4 is connected to the third end of the second switching valve group 92, and the fourth end of the second switching valve group 92 is connected to the inlet of the second evaporator 22, forming a user-side circulation pipeline.

[0033] In this embodiment, the switching valve group is a prior art, and its function is similar to that of a four-way reversing valve. Specifically, the first switching valve group 91 can be a rectangular pipeline, the four corners of the rectangular pipeline are four ports, and a valve is provided on each of the four sides of the rectangular pipeline, so that the flow direction in the pipeline can be changed by controlling the opening and closing of the valve. For example, Figure 1 As shown, the first end of the first switching valve group 91 is the upward end, the second end is the left end, the third end is the right end, and the fourth end is the downward end, and valve A, valve B, valve C, and valve D are respectively provided on the four pipelines.

[0034] Similarly, if Figure 1 As shown, the first end of the second switching valve group 92 is the end facing right, the second end is the end facing upward, the third end is the end facing downward, and the fourth end is the end facing left, and valves E, F, G, and H are respectively provided on the four pipelines.

[0035] Based on the above structure, the ground source heat pump system provided in this embodiment can include the following three operating conditions during operation:

[0036] 1) When domestic hot water is supplied throughout the year, Figure 2 As shown, the pipeline between the first condenser 11 and the domestic hot water user end 3 is kept connected to form a user-side circulation pipeline;

[0037] At the same time, the pipelines among the first evaporator 12, the deep water distributor 62, the deep buried pipe 52, and the deep water collector 61 are kept connected to form a ground source side circulation pipeline.

[0038] In the user-side circulation pipeline, the first condenser 11 extracts heat from the ground source-side circulation pipeline and produces high-temperature circulating water through heat pump technology, which is then transported to the domestic hot water user end 3 to provide domestic hot water;

[0039] In the circulation pipeline on the ground source side, the deep buried pipe 52 uses circulating water to exchange heat with the rock and soil in the mixing area 5, absorbs heat from the rock and soil, and transports the heat to the heat pump unit 1 for domestic hot water and lifts it to the circulation pipeline on the user side. This cycle is repeated to continuously provide domestic hot water to the domestic hot water user end 3.

[0040] 2) In summer, when air conditioning is used for cooling, Figure 3As shown, the pipeline between the second evaporator 22 and the air conditioner user end 4 is kept connected, and the valve B / D in the first switching valve group 91 is closed and the valve C is opened, and the valve E / G in the second switching valve group 92 is closed and the valve H is opened, so as to form a user-side circulation pipeline;

[0041] At the same time, the pipelines among the second condenser 21, the shallow water distributor 64, the shallow buried pipe 51, and the shallow water collector 63 are kept connected, and valve A is opened in the first switching valve group 91, and valve F is opened in the second switching valve group 92 to form a ground source side circulation pipeline.

[0042] In the user-side circulation pipeline, the second evaporator 22 cools the circulating medium water through the heat pump technology, and then delivers the cold water to the air-conditioning user end 4 to release the cold to achieve refrigeration, while the excess heat is discharged to the ground source side circulation pipeline through the second condenser 21;

[0043] In the ground source side circulation pipeline, the shallow buried pipe 51 uses circulating water to exchange heat with the rock and soil in the mixing area 5, and releases the excess heat in the user side circulation pipeline into the rock and soil. This cycle is repeated to achieve the cooling effect of the air-conditioning user end 4, and the heat released into the rock and soil can be stored and used to provide domestic hot water throughout the year.

[0044] 3) When the air conditioner is used for heating in winter, the pipeline between the second condenser 21 and the air conditioner user end 4 is kept connected, and the valve A / C is closed and the valve D is opened in the first switching valve group 91, and the valve F / H is closed and the valve G is opened in the second switching valve group 92, so as to form a user-side circulation pipeline;

[0045] At the same time, the pipelines among the second evaporator 22, the shallow water distributor 64, the shallow buried pipe 51, and the shallow water collector 63 are kept connected, and valve B is opened in the first switching valve group 91, and valve E is opened in the second switching valve group 92 to form a ground source side circulation pipeline.

[0046] In the user-side circulation pipeline, the second condenser 21 absorbs heat from the ground source-side circulation pipeline to raise the temperature of the circulating medium water, and then delivers the hot water to the air-conditioning user end 4 to release heat and realize heating;

[0047] In the circulation pipeline on the ground source side, the shallow buried pipe 51 uses circulating water to exchange heat with the rock and soil in the mixing area 5, extracts heat from the rock and soil and transports it to the second evaporator 22, and uses heat pump technology to convert the heat to the user side circulation pipeline. This cycle is repeated to achieve the heating function of the air-conditioning user end 4.

[0048] In summary, the geothermal heat pump system provided in this embodiment uses the shallow buried pipe 51 to provide cooling and heating, and the deep buried pipe 52 to provide domestic hot water. In the cooling season, the shallow buried pipe 51 is used to supplement the heat to the deep buried pipe system, thereby improving the stability and efficiency of domestic hot water supply. Moreover, through the combination of heat exchange between the shallow buried pipe 51 and the deep buried pipe 52, the conversion of heat at different times and in different scenes is realized, fundamentally avoiding the defect problem of "rock and soil heat imbalance" caused by the single use of shallow buried pipes, which can not only stably and efficiently provide cooling and heating for buildings, but also provide the required quality domestic hot water.

[0049] In order to avoid excessive use of heat in the rock and soil during winter heating, resulting in insufficient heat in the rock and soil near the deep buried pipe 52, and the inability to stably provide domestic hot water, the ground source heat pump system provided in this embodiment also includes a shallow buried pipe 53 for heating, and some branches of the shallow water distributor 64 are connected to the inlet of the shallow buried pipe 53 for heating, and the outlet of the shallow buried pipe 53 for heating is connected to the branch of the shallow water collector 63. The shallow buried pipe 53 for heating and the deep buried pipe 52 are buried in different areas. For example, Figure 1 As shown, nine shallow buried heating pipes 53 are buried in the shallow area 7, which are divided into three groups. The three branches of the shallow water distributor 64 are respectively connected to the three groups of shallow buried heating pipes 53, that is, one branch of the shallow water distributor 64 is simultaneously connected to the inlets of three shallow buried heating pipes 53, and the outlets of the three shallow buried heating pipes 53 are simultaneously connected to one branch of the shallow water collector 63.

[0050] In this way, when air conditioning is used for heating in winter, the pipelines among the second evaporator 22, the shallow water distributor 64, the shallow buried pipe 51, the shallow buried pipe for heating 53, and the shallow water collector 63 are kept connected, and valve A / C is closed and valve B is opened in the first switching valve group 91, and valve F / H is closed and valve E is opened in the second switching valve group 92, so as to form a ground source side circulation pipeline.

[0051] At this time, in the user-side circulation pipeline, the second condenser 21 absorbs heat from the ground source-side circulation pipeline to raise the temperature of the circulating medium water, and then delivers the hot water to the air-conditioning user end 4 to release heat and realize heating;

[0052] In the ground source side circulation pipeline, the shallow buried pipe 51 uses circulating water to exchange heat with the rock and soil in the mixing area 5 and the shallow area 7, extracts heat from the rock and soil and transports it to the second evaporator 22, and uses heat pump technology to convert the heat to the user side circulation pipeline, and so on, to achieve the heating function of the air conditioning user end 4. When necessary, the shallow buried pipe 51 can be closed, so that the circulating water can only exchange heat with the rock and soil in the shallow area 7, and cannot absorb heat from the rock and soil in the mixing area 5.

[0053] By absorbing heat from the rock and soil in different regions, it is possible to avoid using too much heat in the rock and soil during winter heating, resulting in insufficient heat in the rock and soil near the deep buried pipe 52, and being unable to stably provide domestic hot water. When in use, two or more areas can be set according to actual conditions, and multiple wells can be set in each area. The number of wells is determined according to the needs of cooling and heating and domestic hot water, and the layout of the shallow buried pipe and the deep buried pipe is optimized according to the requirements of efficient heat exchange.

[0054] In this embodiment, a water pump is provided on the pipeline connecting the outlet of the domestic hot water user end 3 and the inlet of the first condenser 11. The water pump can be provided to realize the flow of circulating water in the pipeline.

[0055] A water pump is provided on the pipeline connecting the main inlet of the deep water collector 61 and the inlet of the first evaporator 12. Similarly, the flow of circulating water in the pipeline can be achieved by providing a water pump.

[0056] Two parallel water pumps are provided on the pipeline connecting the main port of the shallow water collector 63 and the first end of the first switching valve group 91. Similarly, the flow of circulating water in the pipeline can be achieved by setting up water pumps. The two water pumps are connected in parallel, and the capacity can be reasonably matched according to the needs of summer cooling and winter heating to ensure the efficient operation of the entire system.

[0057] A water pump is provided on the pipeline connecting the outlet of the air conditioner user end 4 and the third end of the second switching valve group 92. Similarly, the flow of circulating water in the pipeline can be achieved by providing a water pump.

[0058] In this embodiment, a controller can be provided to intelligently control the switching valve group and the water pump, and the corresponding seasonal operating conditions can be set according to demand to achieve automatic adjustment of the entire system, making it more convenient to use.

[0059] In this embodiment, the buried depth of the shallow buried pipe 51 is h, h≤200m. The buried depth of the deep buried pipe 52 is H, 1800m≤H≤3000m. The buried depth can be reasonably selected according to the site hydrogeological conditions, geothermal properties, load requirements and economy.

[0060] In this embodiment, the deep buried pipe 52 can be a vertically arranged shell-and-tube heat exchanger, whose inner pipe and outer pipe respectively constitute the outlet and inlet. Increasing the longitudinal depth of the buried pipe as a whole can increase the heat exchange capacity of the buried pipe system, and can effectively reduce the area occupied by the buried pipe and improve the quality and stability of the domestic hot water supply when the demand for domestic hot water supply remains unchanged.

[0061] In this embodiment, the shallow buried pipe 51 may be a vertically arranged U-shaped pipe, and the two ends of the U-shaped pipe constitute the respective outlet and inlet.

[0062] The mechanisms, components and parts not specifically described in the present invention are all existing structures in the prior art and can be directly purchased from the market.

[0063] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0064] The above is only a preferred embodiment of the utility model, and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-zone buried pipe storage and parallel ground source heat pump system, characterized in that: It comprises a heat pump unit for domestic hot water (1), a heat pump unit for cooling and heating (2), a deep water collector (61), a deep water distributor (62), a shallow water collector (63), a shallow water distributor (64), a first switching valve group (91), a second switching valve group (92), a shallow buried pipe (51), and a deep buried pipe (52), wherein the shallow buried pipe (51) and the deep buried pipe (52) are buried in the same area; The domestic hot water heat pump unit (1) comprises a first condenser (11) and a first evaporator (12); the outlet of the first condenser (11) is connected to the inlet of the domestic hot water user end (3); the outlet of the domestic hot water user end (3) is connected to the inlet of the first condenser (11); the outlet of the first evaporator (12) is connected to the main inlet of the deep water distributor (62); the branch outlet of the deep water distributor (62) is connected to the inlet of the deep buried pipe (52); the outlet of the deep buried pipe (52) is connected to the branch outlet of the deep water collector (61); the main inlet of the deep water collector (61) is connected to the inlet of the first evaporator (12); The heat pump unit (2) for cooling and heating comprises a second condenser (21) and a second evaporator (22); the outlet of the second condenser (21) is connected to the first end of the second switching valve group (92); the second end of the second switching valve group (92) is connected to the main port of the shallow water distributor (64); some of the branch ports of the shallow water distributor (64) are connected to the inlet of the shallow buried pipe (51); the outlet of the shallow buried pipe (51) is connected to the branch port of the shallow water collector (63); the main port of the shallow water collector (63) is connected to the outlet of the shallow buried pipe (51); The first switching valve group (91) is connected to the first end of the first switching valve group (91), the second end of the first switching valve group (91) is connected to the inlet of the second condenser (21), the outlet of the second evaporator (22) is connected to the third end of the first switching valve group (91), the fourth end of the first switching valve group (91) is connected to the inlet of the air conditioner user end (4), the outlet of the air conditioner user end (4) is connected to the third end of the second switching valve group (92), and the fourth end of the second switching valve group (92) is connected to the inlet of the second evaporator (22).

2. A multi-zone buried pipe storage and parallel ground source heat pump system according to claim 1, characterized in that: The system also includes a shallow buried pipe (53) for heating, a branch of the shallow water distributor (64) is connected to the inlet of the shallow buried pipe (53) for heating, an outlet of the shallow buried pipe (53) for heating is connected to the branch of the shallow water collector (63), and the shallow buried pipe (53) for heating and the deep buried pipe (52) are buried in different areas.

3. The multi-zone buried pipe storage and parallel ground source heat pump system according to claim 1, characterized in that: A water pump is provided on a pipeline connecting the outlet of the domestic hot water user end (3) and the inlet of the first condenser (11).

4. The multi-zone buried pipe storage and parallel ground source heat pump system according to claim 1, characterized in that: A water pump is provided on a pipeline connecting the main inlet of the deep water collector (61) and the inlet of the first evaporator (12).

5. The multi-zone buried pipe storage and parallel ground source heat pump system according to claim 1, characterized in that: Two parallel water pumps are provided on a pipeline connecting the main port of the shallow water collector (63) and the first end of the first switching valve group (91).

6. The multi-zone buried pipe storage and parallel ground source heat pump system according to claim 1, characterized in that: A water pump is provided on a pipeline connecting the outlet of the air conditioner user end (4) and the third end of the second switching valve group (92).

7. The multi-zone buried pipe storage and parallel ground source heat pump system according to claim 1, characterized in that: The buried depth of the shallow buried pipe (51) is h, where h≤200m.

8. The multi-zone buried pipe storage and parallel ground source heat pump system according to claim 1, characterized in that: The buried depth of the deep buried pipe (52) is H, 1800m≤H≤3000m.

9. The multi-zone buried pipe storage and parallel ground source heat pump system according to claim 1, characterized in that: The deep buried pipe (52) is a vertically arranged shell-and-tube heat exchanger, wherein the inner pipe and the outer pipe respectively constitute the respective outlet and inlet.

10. The multi-zone buried pipe storage and parallel ground source heat pump system according to claim 1, characterized in that: The shallow buried pipe (51) is a vertically arranged U-shaped pipe, and the two ends of the U-shaped pipe constitute the respective outlet and inlet.

Images