Ground source heat pump system

Abstract

The utility model provides a ground source heat pump system, an energy storage power station comprises a plurality of energy storage cabinets, each energy storage cabinet is internally provided with a heat exchange piece, and the ground source heat pump system comprises a heat pump air conditioner; one end of the liquid inlet pipeline communicates with the input ends of the heat exchange pieces of the multiple energy storage cabinets, and the other end of the liquid inlet pipeline is arranged in the output end of the heat pump air conditioner; one end of the liquid outlet pipeline communicates with the output ends of the heat exchange pieces of the multiple energy storage cabinets, and the other end of the liquid outlet pipeline is arranged in the input end of the heat pump air conditioner; the multiple heat exchange pieces, the liquid inlet pipeline and the liquid outlet pipeline jointly form a first loop. By applying the technical scheme of the utility model, the technical problem of high cost in related technologies can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ground source heat pumps, in particular to a ground source heat pump system. Background Art

[0002] A geothermal heat pump is an energy-efficient air conditioning system that uses water from the earth's surface or shallow layers to provide both cooling and heating. Heat pump technology is a technology that transfers heat from a low-level heat source to a high-level heat source under the drag of high-level energy. The geothermal heat pump system exchanges heat between the circulating fluid circulating in the closed heat exchange tube and the ground, absorbing heat in winter and dissipating heat in summer.

[0003] The temperature of the energy storage power station needs to be controlled within an appropriate range in summer and winter. In the related art, each energy storage cabinet of the energy storage power station is equipped with a separate split air conditioner, which not only increases the cost of temperature control, but also makes it inconvenient to inspect and maintain the air conditioning system, thus affecting the operating efficiency of the energy storage power station. Utility Model Content

[0004] The embodiment of the utility model provides a ground source heat pump system, which can improve the technical problem of high cost in related technologies.

[0005] An embodiment of the utility model provides a ground source heat pump system, wherein the energy storage power station comprises a plurality of energy storage cabinets, each of which is provided with a heat exchange element, and the ground source heat pump system comprises: a heat pump air conditioner; a liquid inlet pipeline, wherein one end of the liquid inlet pipeline is connected to the input end of the heat exchange element of the plurality of energy storage cabinets, and the other end of the liquid inlet pipeline is arranged in the output end of the heat pump air conditioner; a liquid outlet pipeline, wherein one end of the liquid outlet pipeline is connected to the output end of the heat exchange element of the plurality of energy storage cabinets, and the other end of the liquid outlet pipeline is arranged in the input end of the heat pump air conditioner; wherein the plurality of heat exchange elements, the liquid inlet pipeline and the liquid outlet pipeline together form a first loop.

[0006] In one embodiment, a heat pump air conditioner includes: a heat pump main unit and a geothermal unit, the geothermal unit has a second circuit, the heat pump main unit has a first heat exchanger and a second heat exchanger, the heat pump main unit performs heat exchange with liquid in a liquid inlet pipeline and a liquid outlet pipeline through the first heat exchanger, and the heat pump main unit performs heat exchange with the geothermal unit through the second heat exchanger.

[0007] In one embodiment, the heat pump host further includes: a compressor, a four-way valve, and a throttle valve. The compressor, the four-way valve, and the throttle valve together form a third circuit. The third circuit exchanges heat with the first circuit through a first heat exchanger, and the third circuit exchanges heat with the second circuit through a second heat exchanger.

[0008] In one embodiment, the geothermal energy unit includes an underground pipe, which is buried in the ground surface.

[0009] In one embodiment, the geothermal energy unit further includes a first water pump, a first filter and a first one-way valve, and the first water pump, the first filter, the buried pipe and the first one-way valve together form a second loop.

[0010] In one embodiment, the liquid inlet pipeline includes a main liquid inlet pipe and a plurality of liquid inlet branches connected to the main liquid inlet pipe, the liquid outlet pipeline includes a main liquid outlet pipe and a plurality of liquid outlet branches connected to the main liquid outlet pipe, and both ends of the heat exchange element are respectively connected to the liquid inlet branch pipe and the liquid outlet branch pipe and are arranged in one-to-one correspondence. The heat pump air conditioner can perform heat exchange with the liquid in the main liquid inlet pipe and the main liquid outlet pipe.

[0011] In one embodiment, the geothermal heat pump system further includes a second water pump, a second filter and a second one-way valve. The second water pump, the second filter, the buried pipe, the second one-way valve, a plurality of heat exchange elements, a liquid inlet pipeline and a liquid outlet pipeline together form a second loop.

[0012] In one embodiment, the outsides of the liquid inlet pipeline and the liquid outlet pipeline are wrapped with insulation components.

[0013] In one embodiment, the liquid in the first circuit includes ethylene glycol.

[0014] In one embodiment, the diameter of the main liquid inlet pipe is larger than the diameter of the liquid inlet branch pipe, and the diameter of the main liquid outlet pipe is larger than the diameter of the liquid outlet branch pipe.

[0015] By applying the technical solution of the utility model, a plurality of heat exchange components, a liquid inlet pipeline and a liquid outlet pipeline are combined to form a first loop, and the heat pump air conditioner increases or decreases the temperature in the energy storage cabinet by performing heat exchange with the liquid in the first loop. By setting the above structure, the heat pump air conditioner only needs to perform heat exchange with the liquid in the liquid inlet pipeline and the liquid outlet pipeline to achieve temperature regulation of a plurality of energy storage cabinets, thus not requiring too many air conditioning components, thereby reducing the cost of temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of a ground source heat pump system and an energy storage cabinet provided in an embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of a liquid inlet pipeline, a liquid outlet pipeline and a heat pump host provided by an embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of a ground source heat pump system provided in an embodiment of the utility model.

[0020] The above drawings include the following reference numerals:

[0021] 1. Heat pump air conditioner;

[0022] 10. Energy storage cabinet; 11. Heat exchanger;

[0023] 21. Main liquid inlet pipe; 22. Liquid inlet branch pipe;

[0024] 31. Main liquid outlet pipe; 32. Liquid outlet branch pipe;

[0025] 40. Heat pump host; 41. First heat exchanger; 42. Second heat exchanger; 43. Compressor; 44. Four-way valve; 45. Throttle valve;

[0026] 50. geothermal energy unit; 51. underground pipe; 52. first water pump; 53. first filter; 54. first non-return valve;

[0027] 61. Second water pump; 62. Second filter; 63. Second one-way valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0029] like Figures 1 to 3 As shown, an embodiment of the utility model provides a ground source heat pump system, the energy storage power station includes a plurality of energy storage cabinets 10, each energy storage cabinet 10 is provided with a heat exchanger 11, and the ground source heat pump system includes: a heat pump air conditioner; an inlet pipeline, one end of the inlet pipeline is connected to the input end of the heat exchanger 11 of the plurality of energy storage cabinets 10, and the other end of the inlet pipeline is arranged in the output end of the heat pump air conditioner; an outlet pipeline, one end of the outlet pipeline is connected to the output end of the heat exchanger 11 of the plurality of energy storage cabinets 10, and the other end of the outlet pipeline is arranged in the input end of the heat pump air conditioner; wherein the plurality of heat exchangers 11, the inlet pipeline and the outlet pipeline together form a first loop.

[0030] By applying the technical solution of the utility model, a plurality of heat exchange elements 11, a liquid inlet pipeline and a liquid outlet pipeline are jointly formed into a first loop, and the heat pump air conditioner 1 increases or decreases the temperature in the energy storage cabinet 10 by performing heat exchange with the liquid in the first loop. By setting the above structure, the heat pump air conditioner 1 only needs to perform heat exchange with the liquid in the liquid inlet pipeline and the liquid outlet pipeline to achieve temperature regulation of the plurality of energy storage cabinets 10, so that too many air conditioning components are not required, thereby reducing the cost of temperature control.

[0031] In the present application, the heat pump air conditioner increases or decreases the temperature in the energy storage cabinet 10 by exchanging heat with the liquid in the first circuit, thereby ensuring that the energy storage cabinet 10 operates at a safe and stable temperature.

[0032] Furthermore, the liquid inlet pipeline includes a main liquid inlet pipe 21 and a plurality of liquid inlet branches 22 connected to the main liquid inlet pipe 21, the liquid outlet pipeline includes a main liquid outlet pipe 31 and a plurality of liquid outlet branches 32 connected to the main liquid outlet pipe 31, the heat exchange element 11, the liquid inlet branch pipe 22 and the liquid outlet branch pipe 32 are arranged one by one, and the two ends of the heat exchange element 11 are respectively connected to the liquid inlet branch pipe 22 and the liquid outlet branch pipe 32, and the heat pump air conditioner 1 can perform heat exchange with the liquid in the main liquid inlet pipe 21 and the main liquid outlet pipe 31. By setting the above structure, the heat pump air conditioner 1 only needs to perform heat exchange with the liquid in the main liquid inlet pipe 21 and the main liquid outlet pipe 31 to achieve temperature control of multiple energy storage cabinets 10, which can reduce the production cost of the device, thereby facilitating the batch installation of the device.

[0033] Specifically, the heat pump air conditioner 1 includes: a heat pump main unit 40 and a geothermal unit 50. The geothermal unit 50 has a second circuit. The heat pump main unit 40 has a first heat exchanger 41 and a second heat exchanger 42. The heat pump main unit 40 exchanges heat with the liquid in the total liquid inlet pipe and the total liquid outlet pipe through the first heat exchanger 41, and the heat pump main unit 40 exchanges heat with the geothermal unit 50 through the second heat exchanger 42. By setting the above structure, the heat exchange with the heat exchanger can be realized by using the surface energy, so that the temperature of the energy storage cabinet 10 can be controlled by using green energy, which can not only protect the environment to a certain extent and meet the environmental protection requirements of green energy, but also reduce the cost of temperature control. In addition, the geothermal unit 50 usually has a long service life, so the maintenance cost can be saved accordingly.

[0034] Furthermore, the heat pump host 40 further includes: a compressor 43, a four-way valve 44, and a throttle valve 45. The compressor 43, the four-way valve 44, and the throttle valve 45 together form a third circuit. The third circuit exchanges heat with the first circuit through the first heat exchanger 41, and the third circuit exchanges heat with the second circuit through the second heat exchanger 42. The compressor 43 can work on the refrigerant in the third circuit so as to heat exchange the temperature of the second circuit with the temperature in the first circuit.

[0035] Specifically, the geothermal unit 50 includes a buried pipe 51, which is buried in the surface layer. In the present application, the buried pipe 51 is set in the soil to exchange heat with the soil. A plurality of mounting holes are set in the soil. Specifically, the buried pipe 51 may include a plurality of groups of double U-shaped buried pipes set in the mounting holes. The double U-shaped buried pipes include U-shaped elbows and corrugated heat exchange pipes. Heat exchange pipes are set at the ends of the elbows. Fillers are filled between the heat exchange pipes and the hole walls of the mounting holes. The heat exchange pipes are vertical heat exchange pipes. In the present embodiment, the heat exchange pipes are made of a new type of corrosion-resistant, high thermal conductivity, and lightweight material, and the heat exchange pipes are in the shape of corrugated pipes to increase the heat exchange area, thereby jointly improving the heat exchange capacity of the buried pipes 51 when the ground source heat pump main unit 40 is used. Specifically, the elbow is set at the bottom of the installation hole. The elbow is used as a fitting to connect the heat exchange tube. After the vertical heat exchange tube and the elbow are installed, the hole is immediately sealed with a composite backfill material. The composite backfill material uses a mixed slurry of original slurry, bentonite and fine sand (or cement), and then a high-pressure mud pump is used to pressurize the bottom to ensure the compactness of the backfill. Among them, the thermal conductivity of the filler material is greater than or equal to the thermal conductivity of the soil, which can avoid affecting the heat exchange efficiency of the water and soil in the heat exchange tube.

[0036] Furthermore, the geothermal energy unit 50 further includes a first water pump 52, a first filter 53 and a first one-way valve 54. The first water pump 52, the first filter 53, the buried pipe 51 and the first one-way valve 54 together form a second loop.

[0037] Specifically, the geothermal heat pump system also includes a second water pump 61, a second filter 62 and a second one-way valve 63. The second water pump 61, the second filter 62, the buried pipe 51, the second one-way valve 63, multiple heat exchange components 11, the liquid inlet pipeline and the liquid outlet pipeline together form a second loop.

[0038] In the present application, during summer cooling, the compressor 43 performs work on the refrigerant to perform vapor-liquid conversion. The heat is absorbed into the refrigerant by the evaporation of the refrigerant, and the low-temperature and low-pressure gaseous refrigerant is converted into a high-temperature and high-pressure gaseous refrigerant. The temperature deep underground is low at this time, and condensation is performed in the heat exchanger on the ground source side. The heat is transferred to the ground source side.

[0039] During winter heating, the refrigerant is heated and evaporated into gas, and the compressor 43 works on the refrigerant, converting the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant. The refrigerant condenses in the first heat exchanger 41, transferring heat to the first circuit.

[0040] Furthermore, the outside of the liquid inlet pipeline and the liquid outlet pipeline are wrapped with insulation. By setting the above structure, it is possible to prevent the system from exchanging part of the heat from the outer wall of the pipeline with the outside during heat exchange, thereby reducing the loss during heat exchange, which is conducive to improving the heat exchange efficiency of the device to ensure the stable operation of the entire system.

[0041] Specifically, the liquid in the first loop includes ethylene glycol. Since ethylene glycol has the characteristics of high efficiency and energy saving, low price, low cost, safety and reliability, the use of the above material can not only ensure the heat exchange efficiency of the device, but also further reduce the use cost of the device. Optionally, the liquid in the first loop can also be set to other substances such as water and oil. The specific setting should be selected according to the use environment of the device, as long as it can meet the use requirements of the device.

[0042] In one embodiment, the diameter of the main liquid inlet pipe 21 is larger than the diameter of the liquid inlet branch pipe 22, and the diameter of the main liquid outlet pipe 31 is larger than the diameter of the liquid outlet branch pipe 32. This arrangement can adjust the liquid flow in the liquid inlet branch pipe 22 and the liquid outlet branch pipe 32, thereby facilitating the specific adjustment of the temperature control.

[0043] By applying the technical solution of the utility model, a plurality of heat exchange elements 11, a liquid inlet pipeline and a liquid outlet pipeline are jointly formed into a first loop, and the heat pump air conditioner 1 increases or decreases the temperature in the energy storage cabinet 10 by performing heat exchange with the liquid in the first loop. By setting the above structure, the heat pump air conditioner 1 only needs to perform heat exchange with the liquid in the liquid inlet pipeline and the liquid outlet pipeline to achieve temperature regulation of the plurality of energy storage cabinets 10, so that too many air conditioning components are not required, thereby reducing the cost of temperature control.

[0044] It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof. Unless otherwise specifically stated, the relative arrangement of the components and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0045] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0047] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0048] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. 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 ground source heat pump system, used in an energy storage power station, characterized in that: The energy storage power station includes a plurality of energy storage cabinets, each of which is provided with a heat exchange element, and the ground source heat pump system includes: Heat pump air conditioner; A liquid inlet pipeline, one end of which is connected to the input ends of the heat exchangers of the energy storage cabinets, and the other end of which is arranged in the output end of the heat pump air conditioner; A liquid outlet pipeline, one end of which is connected to the output ends of the heat exchangers of the energy storage cabinets, and the other end of which is arranged in the input end of the heat pump air conditioner; Wherein, the plurality of heat exchange elements, the liquid inlet pipeline and the liquid outlet pipeline together form a first loop.

2. The ground source heat pump system according to claim 1, characterized in that: The heat pump air conditioner includes: a heat pump main unit and a geothermal unit, the geothermal unit has a second circuit, the heat pump main unit has a first heat exchanger and a second heat exchanger, the heat pump main unit performs heat exchange with the liquid in the liquid inlet pipeline and the liquid outlet pipeline through the first heat exchanger, and the heat pump main unit performs heat exchange with the geothermal unit through the second heat exchanger.

3. The ground source heat pump system according to claim 2, characterized in that: The heat pump host also includes: a compressor, a four-way valve, and a throttle valve. The compressor, the four-way valve, and the throttle valve together form a third circuit. The third circuit exchanges heat with the first circuit through the first heat exchanger, and the third circuit exchanges heat with the second circuit through the second heat exchanger.

4. The ground source heat pump system according to claim 2, characterized in that: The geothermal energy unit comprises an underground pipe, and the underground pipe is buried in the ground surface layer.

5. The ground source heat pump system according to claim 4, characterized in that: The geothermal energy unit further includes a first water pump, a first filter and a first one-way valve. The first water pump, the first filter, the buried pipe and the first one-way valve together form the second loop.

6. The ground source heat pump system according to claim 5, characterized in that: The liquid inlet pipeline includes a main liquid inlet pipe and a plurality of liquid inlet branches connected to the main liquid inlet pipe, the liquid outlet pipeline includes a main liquid outlet pipe and a plurality of liquid outlet branches connected to the main liquid outlet pipe, the two ends of the heat exchange element are respectively connected to the liquid inlet branch pipe and the liquid outlet branch pipe and are arranged in a one-to-one correspondence, and the heat pump air conditioner can perform heat exchange with the liquid in the main liquid inlet pipe and the main liquid outlet pipe.

7. The ground source heat pump system according to any one of claims 4 to 6, characterized in that: The geothermal heat pump system also includes a second water pump, a second filter and a second one-way valve. The second water pump, the second filter, the buried pipe, the second one-way valve, a plurality of the heat exchange elements, the liquid inlet pipeline and the liquid outlet pipeline together form the second loop.

8. The ground source heat pump system according to claim 1, characterized in that: The outer sides of the liquid inlet pipeline and the liquid outlet pipeline are both wrapped with heat-insulating components.

9. The ground source heat pump system according to claim 1, characterized in that: The liquid in the first circuit includes ethylene glycol.

10. The ground source heat pump system according to claim 6, characterized in that: The diameter of the main liquid inlet pipe is larger than the diameter of the liquid inlet branch pipe, and the diameter of the main liquid outlet pipe is larger than the diameter of the liquid outlet branch pipe.

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