CN218442579U

CN218442579U - Geothermal energy central air conditioning host and geothermal energy central air conditioning system

Info

Publication number: CN218442579U
Application number: CN202121434935.2U
Authority: CN
Inventors: 秦丹志; 杨利华
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-30
Filing date: 2021-06-25
Publication date: 2023-02-03
Anticipated expiration: 2031-06-25

Abstract

The utility model belongs to the technical field of geothermal air conditioning equipment, and discloses a geothermal energy central air conditioning host, which comprises a first heat exchange barrel, a first heat exchange cavity and two connecting ends communicated with the first heat exchange cavity, wherein the two connecting ends are used for being connected with a geothermal energy conversion device buried underground, and the first heat exchange barrel and the geothermal energy conversion device can form a geothermal circulation loop; the second heat exchange barrel is provided with a second heat exchange cavity and two second connecting ends communicated with the second heat exchange cavity, the two second connecting ends are used for being connected with an air conditioner internal unit device, and the second heat exchange barrel and the air conditioner internal unit device can form an air conditioner circulation loop; a refrigeration and heating circulation pipeline; also discloses a geothermal energy central air conditioning system. The utility model discloses in having avoided refrigeration and having heated circulation loop's refrigerant to participate in air conditioner internal unit or geothermol power transducing unit, the use amount of the fluorine-containing refrigerant that has significantly reduced, environmental protection more has anticorrosive, the advantage of not scale deposit moreover.

Description

Geothermal energy central air conditioning host and geothermal energy central air conditioning system

Technical Field

The utility model belongs to the technical field of geothermal air conditioning equipment, concretely relates to geothermal energy central air conditioning host computer and geothermal energy central air conditioning system.

Background

The geothermal energy central air-conditioning host machine is used as the most core part of the geothermal energy central air-conditioning system, plays a role in adjusting refrigeration and heating, and realizes refrigeration and heating by utilizing heat exchange with geothermal energy and heat exchange of an air-conditioning indoor machine device.

However, the pipeline connected with the compressor of the existing geothermal air-conditioning main unit is connected to the air-conditioning internal unit device or the geothermal energy conversion pipeline, so that the refrigerant for the compressor to work needs to enter the geothermal energy conversion pipeline or the heat exchange pipeline of the air-conditioning internal unit device to participate in heat exchange, and therefore, the usage amount of the refrigerant is large, and the influence on the environment is correspondingly increased due to the fluorine contained in the refrigerant.

Moreover, the existing exchange barrel for heat exchange is poor in corrosion resistance and scaling resistance, high in cost, difficult to process and low in heat exchange rate, collected geothermal energy cannot be fully utilized, and electric energy consumption is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve one or more of the above technical problems, the present invention provides a geothermal energy central air conditioning system and a host thereof.

The utility model discloses the technical scheme who adopts does:

on the one hand, the utility model provides a geothermal energy central air conditioning host computer, include:

the first heat exchange barrel is provided with a first heat exchange cavity and two connecting ends communicated with the first heat exchange cavity, the two connecting ends are used for being connected with a geothermal energy conversion device buried underground, and the first heat exchange barrel and the geothermal energy conversion device can form a geothermal circulation loop;

the second heat exchange barrel is provided with a second heat exchange cavity and two second connecting ends communicated with the second heat exchange cavity, the two second connecting ends are used for being connected with an air conditioner internal unit device, and the second heat exchange barrel and the air conditioner internal unit device can form an air conditioner circulation loop;

the refrigerating and heating circulating pipeline is provided with two heat exchange parts which are respectively positioned in the first heat exchange cavity and the second heat exchange cavity; the refrigeration and heating circulation pipeline is characterized in that two ends of the refrigeration and heating circulation pipeline are connected with the compressor through the four-way reversing valve to form a refrigeration and heating circulation loop, and the refrigeration and heating circulation loop switches the refrigeration working condition and the heating working condition through the four-way reversing valve.

In a preferred technical scheme, the four-way reversing valve comprises a first channel, a second channel, a third channel and a fourth channel; one end of the refrigeration and heating circulating pipeline is connected with a first channel of the four-way reversing valve, the other end of the refrigeration and heating circulating pipeline is connected with a third channel of the four-way reversing valve, a liquid inlet of the compressor is communicated with a second channel of the four-way reversing valve, and a liquid outlet of the compressor is communicated with a fourth channel of the four-way reversing valve;

when the four-way reversing valve is in a refrigerating working condition, the first channel of the four-way reversing valve is communicated with the fourth channel, and the second channel of the four-way reversing valve is communicated with the third channel; and in the heating condition, the first channel of the four-way reversing valve is communicated with the second channel, and the third channel is communicated with the fourth channel.

In a preferred technical scheme, the four-way reversing valve is an electromagnetic four-way reversing valve, and the electromagnetic four-way reversing valve is provided with the first channel, the second channel, the third channel and the fourth channel.

In a preferred technical scheme, the heat exchange part comprises a heat exchange section, and the heat exchange section is provided with a heat exchange structure.

In a preferred technical scheme, the first heat exchange barrel comprises a barrel body, and a liquid inlet and a liquid outlet which are used for being connected with the geothermal energy conversion device are respectively arranged at two ends of the barrel body; the top and the bottom of the cylinder body are hermetically connected with end covers, and one end cover is provided with a connecting hole for two ends of the heat exchange section to pass through; the end part of the heat exchange section penetrates through the outer wire joint and is communicated with the refrigerating and heating circulation loop; the heat exchange section is connected with the outer thread joint in a sealing mode.

In the preferred technical scheme, an extension pipe is welded at one end, far away from the inner wire joint, of the outer wire joint, and the end, far away from the inner wire joint, of the extension pipe is welded and sealed with a heat exchange section penetrating through the extension pipe at the same time.

In a preferred technical scheme, the first heat exchange barrel and the second heat exchange barrel are both made of PPR materials.

In a preferred technical scheme, the outer sides of the first heat exchange barrel and the second heat exchange barrel are both provided with heat insulation layers.

In an optimized technical scheme, a flow guide pipe is coaxially connected to the inner end of the liquid inlet of the cylinder, and one end, far away from the liquid inlet, of the flow guide pipe faces towards the inner wall of the cylinder on the front side or the rear side.

On the other hand, the utility model also provides a geothermal energy central air conditioning system, including the geothermal energy central air conditioning host computer of above-mentioned arbitrary item.

The utility model has the advantages that:

(1) The utility model discloses a circulation circuit of three closed carries out mutual heat exchange for refrigeration and heating circulation circuit can be independent for with other circulation circuits, thereby has avoided refrigeration and heating circulation circuit's refrigerant to participate in air conditioner internal unit device or geothermy transducer device, the use of the fluorine-containing refrigerant that has significantly reduced, environmental protection more.

(2) The utility model discloses when reducing the refrigerant use amount, refrigeration and the relative geothermol power circulation circuit of circulation circuit and air conditioner circulation circuit heat, its refrigerant shortens greatly at a endless stroke, has both reduced the operating pressure of compressor operation, has also improved the functioning speed for its refrigeration is higher with the efficiency of heating, and is also corresponding improvement with the exchange efficiency of the refrigerant in other two return circuits.

(3) The utility model discloses a first heat transfer bucket and second heat transfer bucket are made through adopting the PPR material, consequently have difficult scale deposit, be difficult for by the characteristics corroded, easy processing, with low costs and light in weight, also have better heat preservation effect simultaneously.

(4) The utility model discloses a first heat transfer bucket and second heat transfer bucket have good leakproofness, owing to adopt the PPR material, link together through the hot melt between barrel and end cover and between end cover and the internal thread joint, make improving greatly in the leakproofness to the barrel tip, through adopting extension pipe installation heat exchange tube and to its welded seal, also avoided when forming last seal structure making the end cover that the PPR material made and the internal thread joint be heated and the problem that melts when the welding.

(5) The utility model discloses a liquid inlet department at first heat exchange bucket and second heat exchange bucket sets up the honeycomb duct, under geothermal circulation return circuit and air conditioner circulation return circuit's circulation flow's effect, the transduction liquid that gets into in the bucket can form along the bucket wall and be spiral flow structure through the honeycomb duct, consequently, the transduction liquid in geothermal circulation return circuit and the transduction liquid homoenergetic in air conditioner circulation return circuit stop longer time in corresponding heat exchange bucket for the heat transfer rate is higher, and is also more abundant to geothermal energy's utilization.

Drawings

FIG. 1 is a schematic view of the pipeline structure under the refrigeration condition of the present invention;

FIG. 2 is a schematic view of the piping structure in the heating condition of the present invention;

fig. 3 is a schematic structural view of a first heat exchange barrel of the present invention;

FIG. 4 is an enlarged view of the structure of portion A of FIG. 3;

fig. 5 is a schematic view of the transverse cross section of the flow guide tube of the present invention.

In the figure: 1-a first heat exchange barrel; 101-a cylinder body; 102-a tee pipe; 103-end cap; 104-a draft tube; 105-a connection hole; 106-internal thread joint; 107-external thread joint; 108-lengthening tube; 2-a second heat exchange barrel; 3-geothermal energy conversion device; 4-air conditioner internal unit device; 5-geothermal circulation loop; 6-air conditioning circulation loop; 7-refrigeration and heating circulation pipelines; 701-heat exchange tubes; an 8-four-way reversing valve; 801-a first channel; 802-second channel; 803-a third channel; 804-a fourth channel; 9-a compressor; 10-capillary tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, a geothermal energy central air-conditioning main unit includes: first heat exchange bucket 1, second heat exchange bucket 2 and refrigeration and heating circulation pipeline 7, first heat exchange bucket 1, second heat exchange bucket 2 and refrigeration and heating circulation pipeline 7 all locate on a mounting bracket, are convenient for holistic removal and installation, certainly also can set up an equipment box in the outside, and the host computer is located it.

The first heat exchange barrel 1 is provided with a first heat exchange cavity and two connecting ends communicated with the first heat exchange cavity, the two connecting ends are used for being connected with a geothermal energy conversion device buried underground, and the first heat exchange barrel 1 and the geothermal energy conversion device can form a geothermal circulation loop 5; the top end and the bottom end of the first heat exchange barrel 1 are respectively provided with a first connecting end and a second connecting end which are communicated with the first heat exchange cavity in the first heat exchange barrel, the geothermal energy conversion device 3 is a coil pipe which is embedded in underground concrete, and the two ends of the coil pipe are communicated with the first heat exchange barrel through the first connecting end and the second connecting end of the first heat exchange barrel 1, so that a geothermal circulation loop 5 is formed, and energy conversion liquid in the circulation loop is a refrigerant.

The second heat exchange barrel 2 is provided with a second heat exchange cavity and two second connecting ends communicated with the second heat exchange cavity, the two second connecting ends are used for being connected with an air conditioner internal unit device 4, and the second heat exchange barrel 2 and the air conditioner internal unit device 4 can form an air conditioner circulation loop 6; the structure of the second heat exchange barrel 2 is the same as that of the first heat exchange barrel 1, two second connecting ends of the second heat exchange barrel are respectively connected with a pipeline of an air conditioner internal unit device 4 to form an air conditioner circulation loop 6 for outputting refrigeration or heating, and energy conversion liquid in the circulation loop is a refrigerant.

A refrigerating and heating circulation pipeline 7 having two heat exchange parts respectively located in the first heat exchange cavity and the second heat exchange cavity; two ends of the refrigerating and heating circulation pipeline 7 are connected with the compressor 9 through the four-way reversing valve 8 to form a refrigerating and heating circulation loop, and the refrigerating and heating circulation loop switches the refrigerating working condition and the heating working condition through the four-way reversing valve 8. The working fluid in the refrigerating and heating circulation pipeline 7 connected with the compressor 9 is a refrigerant, and the refrigerant is output by the compression action of the compressor 9 on the refrigerant and flows through the heating parts of the circulation loop in the two heat exchange barrels for heat exchange, so that the refrigerants in the first heat exchange barrel 1 and the second heat exchange barrel 2 can absorb or release heat during heat exchange, and the heat exchange of geothermal energy and the output of refrigerating and heating are realized. The four-way reversing valve 8 is used for changing the output direction of the refrigerant of the compressor 9, and further achieves the conversion between the refrigeration working condition and the heating working condition.

Mutual heat exchange is carried out through the three closed circulation loops, so that the refrigeration and heating circulation loops can be independent of other circulation loops, the refrigerant of the refrigeration and heating circulation pipeline 7 is prevented from participating in the air conditioner internal unit device 4 or the geothermal energy conversion device 3, the use of the fluorine-containing refrigerant is greatly reduced, and the environment is protected. Moreover, when the usage amount of the refrigerant is reduced, the refrigerating and heating circulation loop is relatively short relative to the geothermal circulation loop 5 and the air-conditioning circulation loop 6, the circulation stroke of the refrigerant is relatively short, the working pressure of the operation of the compressor 9 is reduced, the speed is increased, the refrigerating and heating efficiency is higher, and the exchange efficiency of the refrigerant with other two loops is correspondingly improved.

As shown in fig. 1 and 2, in a preferred embodiment of the present invention, the four-way reversing valve 8 includes a first passage 801, a second passage 802, a third passage 803, and a fourth passage 804; one end of the refrigerating and heating circulating pipeline 7 is connected with a first channel 801 of the four-way reversing valve 8, the other end of the refrigerating and heating circulating pipeline 7 is connected with a third channel 803 of the four-way reversing valve 8, a liquid inlet of the compressor 9 is communicated with a second channel 802 of the four-way reversing valve 8, and a liquid outlet of the compressor 9 is communicated with a fourth channel 804 of the four-way reversing valve 8;

when the four-way reversing valve 8 is in a refrigerating working condition, the first channel 801 is communicated with the fourth channel 804, and the second channel 802 is communicated with the third channel 803; in a heating condition, the first channel 801 of the four-way reversing valve 8 is communicated with the second channel 802, and the third channel 803 is communicated with the fourth channel 804.

When the refrigeration working condition is entered, the four-way reversing valve 8 is adjusted, the first channel 801 is communicated with the fourth channel 804, the second channel 802 is communicated with the third channel 803, and the compressor 9 of the refrigeration and heating circulating pipeline 7 sucks in a refrigerant, compresses the refrigerant gas into high-temperature and high-pressure refrigerant gas, discharges the refrigerant gas from a liquid outlet of the compressor 9, flows through the fourth channel 804 and the first channel 801, and then enters a heating part of the refrigeration and heating circulating pipeline 7 in the first heat exchange barrel 1; high-temperature and high-pressure refrigerant gas exchanges heat with the refrigerant in the first heat exchange barrel 1 in the heat exchange part, releases heat into the heat exchange barrel and forms super-cooled refrigerant liquid, the super-cooled refrigerant liquid flows out of the heating part and is decompressed into low-temperature and low-pressure liquid through the capillary tube 10, then enters the heat exchange part of the refrigeration and heating circulating pipeline 7 in the second heat exchange barrel 2 to exchange heat with the refrigerant in the heat exchange barrel, absorbs the heat of the refrigerant and evaporates into gas to flow out of the heating part, and the gas flows through the third channel 803 and the second channel 802 of the four-way reversing valve 8 and is sucked again through the liquid inlet of the compressor 9 to perform the next circulation.

When the heating working condition is entered, the four-way reversing valve 8 is adjusted, the first channel 801 is communicated with the second channel 802, the third channel 803 is communicated with the fourth channel 804, the refrigerant is sucked into the compressor 9 of the refrigeration and heating circulating pipeline 7, compressed into high-temperature and high-pressure refrigerant gas and discharged from the liquid outlet of the compressor 9, flows through the fourth channel 804 and the third channel 803, and then enters the heating part of the refrigeration and heating circulating pipeline 7 in the second heat exchange barrel 2; high-temperature and high-pressure refrigerant gas exchanges heat with a refrigerant in the first heat exchange barrel 1 in the heat exchange part, releases heat into the heat exchange barrel and forms supercooled refrigerant liquid, the supercooled refrigerant liquid flows out of the heating part and is reduced in pressure by the capillary tube 10 to be low-temperature and low-pressure liquid, then enters the heat exchange part of the refrigeration and heating circulation pipeline 7 in the first heat exchange barrel 1 to exchange heat with the refrigerant in the heat exchange barrel, absorbs the heat of the refrigerant and evaporates into gas to flow out of the heating part, and the gas flows through the first channel 801 and the second channel 802 of the four-way reversing valve 8 and then is sucked again through the liquid inlet of the compressor 9 to perform the next circulation.

In the heating and refrigerating working conditions, the refrigerant in the second heat exchange barrel 2 of the air-conditioning circulation loop 6 completes the output of refrigeration and heating in the heat exchange process with the refrigerant of the refrigeration and refrigerating circulation loop.

In a preferred embodiment of the present invention, the four-way reversing valve 8 is an electromagnetic four-way reversing valve having the first channel 801, the second channel 802, the third channel 803, and the fourth channel 804. The four-way electromagnetic reversing valve is connected with a controller, and a worker automatically controls the four-way electromagnetic valve to be switched through the controller.

As shown in fig. 1 and 2, in a preferred embodiment of the present invention, the heat exchanging portion includes a heat exchanging section 701, and the heat exchanging section 701 has a heat exchanging structure. The heat exchange structure is used for heat exchange between a refrigeration and heating circulation loop and a geothermal circulation loop 5 and an air-conditioning circulation loop 6, the heat exchange structure can be an S-shaped disc heat exchange structure as shown in fig. 1, or a heat exchange structure with a plurality of heat exchange branch pipes as shown in fig. 3, and in implementation, a heat exchange section 701, i.e. a heat exchange pipe as shown in fig. 3 is preferably adopted. Through set up heat transfer structure on heat transfer section 701, can improve heat exchange efficiency greatly. Specifically, the heat exchange tubes of the heat exchange section 701 are made of copper tubes.

As shown in fig. 3 and 4, in a preferred embodiment of the present invention, the first heat exchanging barrel 1 includes a barrel 101, and a liquid inlet and a liquid outlet for connecting with the geothermal energy exchanging device 3 are respectively disposed at two ends of the barrel 101; the top and the bottom of the cylinder body 101 are hermetically connected with end covers 103, wherein one end cover 103 is provided with a connecting hole 105 for two ends of the heat exchange section 701 to pass through; an inner wire joint 106 is hermetically connected to the outer wall of the end cover 103 corresponding to the connecting hole 105, an outer wire joint 107 is hermetically connected to the inner wire joint 106, and the end of the heat exchange section 701 penetrates through the outer wire joint 107 and is communicated with the refrigeration and heating circulation pipeline 7; the heat exchange section 701 is hermetically connected with the outer wire joint 107.

The two ends of the cylinder 101 are open, so that the heat exchange tube is convenient to install. The liquid inlet and the liquid outlet at the two ends of the cylinder 101 are respectively realized by the three-way pipe 102 connected at the two ends, so that the two ends of the cylinder 101 are opened and the liquid inlet and the liquid outlet are also arranged, and the problem of additional processing is avoided. In this embodiment, the end cap 103 at the bottom end of the cylinder 101 is hermetically connected to the cylinder 101, and meanwhile, in order to prevent leakage of the refrigerant in the cylinder 101 at the position where the heat exchange tube passes through, the sealing performance is further enhanced by the internal thread joint 106 and the external thread joint 107, and finally, the external thread joint 107 is hermetically connected to the heat exchange tube to complete final sealing. Through the sealing structure, the installation of the heat exchange tube is convenient, the sealing performance is ensured,

as shown in fig. 3 and 4, in a preferred embodiment of the present invention, an end of the outer wire joint 107 away from the inner wire joint 106 is welded with an extension pipe 108, and an end of the extension pipe 108 away from the inner wire joint 106 is welded and sealed with the heat exchange section 701 passing through the extension pipe 108. Through setting up extension pipe 108, can avoid outer screwed joint 107 and heat exchange tube direct weld sealed and lead to the problem that is heated or even melts of end cover 103, interior screwed joint 106 of plastics material, when it and heat exchange tube weld sealed, parcel heating pipe such as the wet cloth of accessible prevents that the heat energy transmission that the welding produced connects 107 and end cover 103 to outer screwed joint, and is practical convenient more.

In a preferred embodiment of the present invention, the first heat exchange barrel 1 and the second heat exchange barrel 2 are made of PPR material. The cylinder body 101, the end cover 103 and the external thread joint 107 of the two heat exchange barrels are made of the material, and the heat exchange barrels supported by the material are particularly suitable for geothermal energy conversion environment and have the advantages of difficult structure, no corrosion, easy processing, low cost, light weight and good heat preservation.

In a preferred embodiment of the present invention, the first heat exchange barrel 1 and the second heat exchange barrel 2 are both provided with a heat insulating layer on the outer side. The heat-insulating layer is not shown in the attached drawings, adopts a heat-insulating layer commonly used in the market and is wrapped on the outer side of the heat exchange barrel, so that the heat can be further insulated.

As shown in fig. 3 and 5, in a preferred embodiment of the present invention, a fluid guide pipe 104 is coaxially connected to the inner end of the fluid inlet of the cylinder 101, and one end of the fluid guide pipe 104, which is far away from the fluid inlet, faces the inner wall of the cylinder 101 at the front side or the rear side thereof. The flow guide pipe 104 is similar to an L shape, is also made of PPR material and is connected with the liquid inlet of the cylinder body 101 through hot melting. The angle between the axial direction of the flow-guiding end of the flow-guiding pipe 104 and the axial direction of the liquid inlet is preferably in the range of 60 ° to 140 °, and in practice the angle is 120 °. Under the action of the circulation flow of the geothermal circulation loop 5 and the air-conditioning circulation loop 6, the energy conversion liquid entering the barrel can form a spiral flow structure along the barrel wall through the guide pipe 104, so that the energy conversion liquid of the geothermal circulation loop 5 and the energy conversion liquid of the air-conditioning circulation loop 6 can stay in the corresponding heat exchange barrel for a longer time, the heat exchange rate is higher, and the utilization of geothermal energy is more sufficient.

It should be noted that, when installing the heat exchange section 701, the heat exchange barrel needs to operate according to the following method:

1. the two external wire connectors 107 are firstly connected to the bottom of the end cover 103 in a hot melting mode, and are respectively aligned with the corresponding connecting holes 105, and then the end cover 103 is connected with the bottom end of the cylinder body 101 in a hot melting mode.

2. The extension tube 108 is welded to one end of the outer wire joint 107, and then the outer wire joint 107 is attached inside the inner wire joint 106 by green cement and cured.

3. The heat exchange tube is placed in the cylinder body 101, two ends of the heat exchange tube sequentially penetrate through the connecting hole 105, the inner wire joint 106, the outer wire joint 107 and the lengthened tube 108 which are connected together, the bottom end of the lengthened tube 108 is welded and sealed with the heat exchange tube, and meanwhile, the lengthened tube 108 is wrapped by wet cloth and the like, so that 1 thousand-degree height generated during welding is prevented from being transmitted to the inner wire joint 106 and the end cover 103 to be melted.

4. And finally, connecting the end cover 103 at the top end of the cylinder body 101 with the cylinder body 101 in a hot melting way.

A protective sleeve can be connected to the outer side of the end of the outer screw joint 107 connected with the extension pipe 108 in a threaded manner.

A geothermal energy central air conditioning system comprises the geothermal energy central air conditioning host machine in any one of the embodiments, and of course, also comprises a heat energy conversion device and an air conditioner internal unit device.

Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a geothermal energy central air conditioning host computer which characterized in that: comprises the following steps of;

the first heat exchange barrel (1) is provided with a first heat exchange cavity and two connecting ends communicated with the first heat exchange cavity, the two connecting ends are used for being connected with a geothermal energy conversion device buried underground, and the first heat exchange barrel (1) and the geothermal energy conversion device can form a geothermal circulation loop (5);

the second heat exchange barrel (2) is provided with a second heat exchange cavity and two second connecting ends communicated with the second heat exchange cavity, the two second connecting ends are used for being connected with an air conditioner internal unit device, and the second heat exchange barrel (2) and the air conditioner internal unit device can form an air conditioner circulation loop (6);

a refrigeration and heating circulating pipeline (7) which is provided with two heat exchange parts respectively positioned in the first heat exchange cavity and the second heat exchange cavity; and two ends of the refrigeration and heating circulating pipeline (7) are connected with the compressor (9) through a four-way reversing valve (8) to form a refrigeration and heating circulating loop, and the refrigeration and heating circulating loop switches the refrigeration working condition and the heating working condition through the four-way reversing valve (8).

2. The host machine of claim 1, wherein: the four-way reversing valve (8) comprises a first channel (801), a second channel (802), a third channel (803) and a fourth channel (804); one end of the refrigeration and heating circulating pipeline (7) is connected with a first channel (801) of the four-way reversing valve (8), the other end of the refrigeration and heating circulating pipeline (7) is connected with a third channel (803) of the four-way reversing valve (8), a liquid inlet of the compressor (9) is communicated with a second channel (802) of the four-way reversing valve (8), and a liquid outlet of the compressor (9) is communicated with a fourth channel (804) of the four-way reversing valve (8);

when the four-way reversing valve is in a refrigerating working condition, a first channel (801) of the four-way reversing valve (8) is communicated with a fourth channel (804), and a second channel (802) is communicated with a third channel (803); in a heating condition, a first channel (801) of the four-way reversing valve (8) is communicated with a second channel (802), and a third channel (803) is communicated with a fourth channel (804).

3. A geothermal energy central air conditioning main unit according to claim 2, wherein: the four-way reversing valve (8) is an electromagnetic four-way reversing valve which is provided with a first channel (801), a second channel (802), a third channel (803) and a fourth channel (804).

4. A geothermal energy central air conditioning main unit according to any one of claims 1 to 3, wherein: the heat exchange part comprises a heat exchange section (701), and the heat exchange section (701) has a heat exchange structure.

5. The host machine of claim 4, wherein: the first heat exchange barrel (1) comprises a barrel body (101), and a liquid inlet and a liquid outlet which are used for being connected with the geothermal energy conversion device (3) are respectively arranged at two ends of the barrel body (101); the top and the bottom of the cylinder body (101) are hermetically connected with end covers (103), wherein one end cover (103) is provided with a connecting hole (105) for two ends of the heat exchange section (701) to pass through; the outer wall of the end cover (103) is connected with an inner wire joint (106) in a sealing mode corresponding to the connecting hole (105), the inner wire joint (106) is connected with an outer wire joint (107) in a sealing mode, and the end portion of the heat exchange section (701) penetrates through the outer wire joint (107) and is communicated with the refrigerating and heating circulation loop; the heat exchange section (701) is connected with the outer wire joint (107) in a sealing mode.

6. A geothermal energy central air conditioning main unit according to claim 5, wherein: the outer wire joint (107) is kept away from one end of the inner wire joint (106) and is welded with an extension pipe (108), and one end of the extension pipe (108) which is kept away from the inner wire joint (106) is welded and sealed with a heat exchange section (701) which penetrates through the extension pipe (108) at the same time.

7. The host machine of claim 1, wherein: the first heat exchange barrel (1) and the second heat exchange barrel (2) are both made of PPR materials.

8. The host machine of claim 1, wherein: and heat insulation layers are arranged on the outer sides of the first heat exchange barrel (1) and the second heat exchange barrel (2).

9. A geothermal energy central air conditioning host computer according to claim 5, wherein: the liquid inlet inner end of barrel (101) is connected with honeycomb duct (104) coaxially, the one end that honeycomb duct (104) kept away from this liquid inlet is towards the barrel (101) inner wall of its front side or rear side.

10. The utility model provides a geothermal energy central air conditioning system which characterized in that: comprising a geothermal energy central air conditioning mainframe according to any one of claims 1-9.