Dual-medium air conditioning system

Abstract

The invention provides a dual-medium air-conditioning system, which relates to the field of industrial refrigeration and heating equipment, and comprises a main medium circulating system, an auxiliary medium circulating system and a control system, and further comprises a cabinet, the main medium circulating system, the auxiliary medium circulating system and the control system are integrated in the cabinet, and the cabinet is provided with an air inlet and an air outlet. The main medium circulating system and the auxiliary medium circulating system are electrically connected with the control system, under the control of the control system, refrigeration or heating operation of the air conditioning equipment is achieved, and the dual-medium air conditioning system is provided with a Freon system and water source dual refrigeration and heating system and can be used according to the actual situation of an application factory. Recycled water (low-temperature water or high-temperature water) of a factory is reasonably utilized, particularly low-temperature heat energy of underground water is reasonably utilized, the use amount of Freon is reduced, efficient refrigeration and heating are achieved, meanwhile, damage to the atmospheric ozone layer is reduced, meanwhile, the influence on underground water resources can be reduced through underground water recharge, and the effects of saving energy and reducing consumption are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial air conditioning, in particular to a dual refrigeration industrial air conditioning system combining Freon refrigeration and groundwater refrigeration technology, aiming to provide an efficient, environmentally friendly and energy-saving refrigeration solution. Background Art

[0002] The compressor compresses the gaseous refrigerant into a high-temperature and high-pressure gas, and sends it to the compressor for cooling. After cooling, it becomes a medium-temperature and high-pressure liquid refrigerant and enters the drying bottle for filtration and dehumidification. The medium-temperature liquid refrigerant is throttled and reduced in pressure by the expansion valve and becomes a low-temperature and low-pressure gas-liquid mixture. It absorbs heat from the air and vaporizes through the evaporator, becoming a gas, and then returns to the compressor to continue compression and continue the cycle for refrigeration. When heating, there is a four-way valve that makes the flow direction of Freon in the compressor and evaporator opposite to that of cooling. Therefore, when heating, cold air is blown outdoors and hot air is blown indoors.

[0003] The main purpose of industrial air conditioning is to regulate and control indoor temperature, humidity and air quality to provide a comfortable and suitable working environment. Most traditional industrial air conditioners use a single medium for refrigeration or cooling. The air conditioning system mainly relies on refrigerants such as Freon for refrigeration. Although the refrigeration efficiency is high, the energy consumption is large, and the emission of Freon into the atmosphere will cause the ozone content to decrease, causing serious impact on the environment. According to the different production of factories, some production plants often have recycled low-temperature or high-temperature water. How to use the recycled low-temperature or high-temperature water source as an auxiliary medium for refrigeration or heating, combined with the traditional control of Freon refrigeration and heating, and prepare this equipment has become the subject of this case study;

[0004] At the same time, we can also actively develop groundwater. As a natural cold source, groundwater has the advantages of stable temperature and renewability, and has broad application potential in the field of refrigeration. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides an industrial air conditioner with dual refrigeration of Freon and groundwater, which can not only utilize the high efficiency of Freon refrigeration, but also give play to the energy-saving and environmentally friendly characteristics of groundwater refrigeration, improve the stability and adaptability of the refrigeration system, and reduce energy consumption and operating costs.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dual-media air-conditioning device: including a main media circulation system and an auxiliary media circulation system, and a control system, and also including a cabinet, the main media circulation system and the auxiliary media circulation system, and the control system are integrated in the cabinet, the main media circulation system and the auxiliary media circulation system are electrically connected to the control system, and under the control of the control system, the cooling or heating operation of the air-conditioning equipment is realized.

[0009] Preferably, the medium flowing in the main medium circulation system is Freon, and the main medium circulation system includes a compressor, a gas-liquid separator, an expansion valve, a condenser, a Freon evaporator, a liquid separator, and a four-way valve. The medium flowing in the auxiliary medium circulation system is a water source, and the medium flowing in the condenser of the main medium circulation system is a water source. The auxiliary medium circulation system includes a water source evaporator, a water supply device and a drainage device, and the water supply device and the drainage device are respectively connected to the inlet and outlet of the water source evaporator and the condenser.

[0010] Preferably, the water source is groundwater, and the water source evaporator is a groundwater evaporator.

[0011] Preferably, the cabinet is divided into two upper and lower chambers, the Freon evaporator and the groundwater source evaporator are accommodated in the upper chamber, the Freon evaporator and the groundwater evaporator are stacked, the groundwater evaporator is arranged outside the Freon evaporator, a fan is arranged in the middle of the Freon evaporator, and the indoor room temperature air passes through the groundwater evaporator and the Freon evaporator respectively, and is discharged by the fan;

[0012] The compressor, gas-liquid separator, expansion valve, condenser, liquid separator and four-way valve are housed in the lower chamber and form passages with each other. The switching of cooling and heating modes is realized by switching the circuit of the four-way valve.

[0013] Preferably, the Freon evaporator includes a Freon circulation pipe and Freon fins, the Freon circulation pipe is arranged in a serpentine shape and is bent in a U shape as a whole, and the Freon fins are arranged on the Freon circulation pipe. One end of the Freon circulation pipe is connected to a splitter, and the other end is connected to a four-way valve. The groundwater evaporator includes a groundwater circulation pipe and groundwater fins, the groundwater circulation pipe is arranged in a serpentine shape and is bent in a U shape as a whole, and the groundwater fins are arranged on the groundwater circulation pipe. The inlet of the groundwater circulation pipe is connected to the groundwater inlet, the outlet of the groundwater circulation pipe is connected to the groundwater outlet, the water supply device is connected to the groundwater inlet, and the drainage device is connected to the groundwater outlet.

[0014] Preferably, the groundwater evaporator comprises a U-shaped water curtain chamber, ventilation holes are provided on the outer side and the inner side of the U-shaped water curtain chamber, a plurality of groundwater inlets are arranged on the top of the U-shaped water curtain chamber, and a plurality of groundwater outlets are arranged on the bottom.

[0015] Preferably, the fan is vertically arranged, the air inlet of the fan is located on two side surfaces, and the air outlet of the fan faces the upper end.

[0016] Preferably, three sides of the upper chamber of the cabinet are provided with air inlet windows, and the air inlet windows correspond to the side surfaces and the bottom surface of the evaporator.

[0017] (III) Beneficial effects

[0018] The present invention provides a dual-medium air conditioning system. It has the following beneficial effects:

[0019] 1. This dual-medium air-conditioning system has a dual cooling and heating system of Freon and water. It can reasonably utilize the factory's recycled water (low-temperature water or high-temperature water) according to the actual situation of the application factory, especially the low-temperature thermal energy of groundwater, reduce the use of Freon, achieve efficient cooling and heating, and reduce the damage to the atmospheric ozone layer. At the same time, groundwater recharge can reduce the impact on groundwater resources and play a role in energy saving and consumption reduction.

[0020] 2. This dual-media air-conditioning system has dual cooling and heating modes that complement each other. It is not affected by the limitations of a single cooling or heating mode, can adapt to different working conditions and environmental conditions, and ensure the stability of the industrial production environment with a higher stability.

[0021] 3. The dual-medium air conditioning system has a cabinet design with two chambers, the evaporator is placed on the upper layer, and the Freon evaporator and groundwater evaporator are stacked in a double U-shape, which greatly increases the contact area with the air. The groundwater evaporator is outside and the Freon evaporator is inside, which is conducive to the passage of air in sequence and achieves a staged effect of gradual cooling or heating.

[0022] 4. In the case where the Freon evaporator and the groundwater evaporator are stacked in a double U shape in the dual-medium air-conditioning system, a water curtain type groundwater evaporator is preferably used, including a U-shaped water curtain chamber, the outer side and the inner side of the U-shaped water curtain chamber are both provided with ventilation holes, a plurality of groundwater inlets are arranged at the top of the U-shaped water curtain chamber, and a plurality of groundwater outlets are arranged at the bottom. Due to the problem of impurities (such as gravel) in the groundwater source, the resistance in the U-shaped tube groundwater evaporator is relatively large, and impurities are easily accumulated on the curved tube wall, and long-term accumulation causes blockage. The water curtain type groundwater evaporator has multiple pipelines, enters the upper end of the U-shaped water curtain chamber, and then flows back at the lower end, so the resistance is greatly reduced, and the groundwater pours down in the U-shaped water curtain chamber, which increases the contact area with the air and further improves the heat exchange effect with the air.

[0023] 5. The dual-medium air conditioning system is equipped with a double U-shaped stacked evaporator, a vertical fan is arranged in the middle, and air inlet windows are opened on the three corresponding sides of the upper side of the cabinet. The fan generates negative pressure, and the air is sucked into the middle of the U-shaped evaporator from the three air inlet windows, and then discharged upward by the fan to achieve sufficient heat exchange of the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a dual-medium air conditioning system of the present invention Figure 1 ;

[0025] Figure 2 A schematic diagram of the structure of a dual-media air conditioning system of the present invention Figure 2 ;

[0026] Figure 3 It is a front view structural schematic diagram of a dual-medium air conditioning system of the present invention;

[0027] Figure 4 The internal structure of a dual-medium air conditioning system of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 5 The internal structure of a dual-medium air conditioning system of the present invention is shown in FIG. Figure 2 ;

[0029] Figure 6 A refrigeration principle diagram of a dual-medium air conditioning system of the present invention;

[0030] Figure 7 This is a heating principle diagram of a dual-medium air conditioning system of the present invention;

[0031] Figure 8 A schematic diagram of another embodiment of a groundwater evaporator of a dual-medium air conditioning system of the present invention.

[0032] In the figure: 10, cabinet; 11, upper chamber; 12, lower chamber; 13, fan; 14, air inlet window; 21, compressor; 22, gas-liquid separator; 23, expansion valve; 24, condenser; 25, Freon evaporator; 251, Freon circulation pipe; 252, Freon fin; 26, liquid distributor; 27, four-way valve; 31, groundwater evaporator; 311, groundwater circulation pipe; 312, groundwater fin; 313, groundwater inlet; 314, groundwater outlet; 32, water supply device; 33, drainage device; 34, pumping well; 35, return well; 36, U-shaped water curtain chamber; 40, control system. DETAILED DESCRIPTION

[0033] The embodiment of the present invention provides a dual-medium air conditioning system, such as Figure 1-5As shown, the overall technical solution includes a main medium circulation system and an auxiliary medium circulation system, and a control system 40, and also includes a cabinet 10, wherein the main medium circulation system and the auxiliary medium circulation system, and the control system 40 are integrated in the cabinet 10, and the main medium circulation system and the auxiliary medium circulation system are electrically connected to the control system 40, and the cooling or heating operation of the air-conditioning equipment is realized under the control of the control system 40. The control system 40 can adopt a PLC controller or a single-chip microcomputer controller, and integrate a temperature sensor, a humidity sensor, and an air quality sensor to realize intelligent control, which is used to monitor and adjust the indoor temperature, humidity, and air quality, and control the operation of the main medium circulation system and the auxiliary medium circulation system.

[0034] Embodiment 1

[0035] The medium flowing in the main medium circulation system is Freon, and the main medium circulation system includes a compressor 21, a gas-liquid separator 22, an expansion valve 23, a condenser 24, a Freon evaporator 25, a liquid separator 26, and a four-way valve 27. The medium flowing in the auxiliary medium circulation system is a water source. The medium flowing in the condenser 24 of the main medium circulation system is a water source. The auxiliary medium circulation system includes a water source evaporator, a water supply device 32 and a drainage device 33. The water supply device 32 and the drainage device 33 are respectively connected to the inlet and outlet of the water source evaporator and the condenser 24. In the embodiment, the medium flowing in the auxiliary medium circulation system is a water source, and according to the actual situation of the factory, the low-temperature return water of the factory can be used for cooling, or the high-temperature return water can be used for heating, and the low-temperature or high-temperature return water system of the factory can be connected.

[0036] Among them, the compressor 21: a high-efficiency and energy-saving compressor 21 is selected to compress the refrigerant into high-pressure and high-temperature gas, and a high-efficiency and energy-saving compressor 21 is selected.

[0037] Condenser 24: A water-cooled condenser 24 is used to cool the high-temperature and high-pressure refrigerant gas into liquid.

[0038] Expansion valve 23: Use electronic expansion valve 23 or thermal expansion valve 23 to accurately control the flow and pressure of the refrigerant. Use electronic expansion valve 23 or thermal expansion valve 23

[0039] Evaporator: Use finned evaporator or shell and tube evaporator to improve refrigeration efficiency.

[0040] Embodiment 2

[0041] Preferably, the water source is groundwater, and the water source evaporator is a groundwater evaporator 31. The actual situation of abundant groundwater resources in rural areas of China is fully taken into consideration, and the characteristic that the temperature change of groundwater lags behind the temperature change of ground air is comprehensively utilized. The auxiliary medium circulation system is provided with a groundwater intake device, a groundwater evaporator 31, a reinjection device, a water delivery device 32 and a drainage device 33. The groundwater intake device is used to extract low-temperature groundwater from the underground, and then the low-temperature groundwater is delivered to the groundwater evaporator 31 and the Freon condenser 24 by the water delivery device 32. The groundwater evaporator 31 is used to exchange the groundwater with the refrigerant in the air-conditioning system. The drainage device 33 discharges the groundwater from the outlets of the groundwater evaporator 31 and the condenser 24, and connects the reinjection device. The reinjection device reinjects the groundwater passing through the groundwater evaporator 31 or the condenser 24 into the underground to avoid affecting the environment. The condenser 24 and the groundwater intake device, the recharging device, the water delivery device 32, and the drainage device 33 are not shown in this case. The condenser 24 belongs to the main medium circulation system and is connected to the Freon evaporator 25. Figure 6 and Figure 7 As shown, the water delivery device 32 draws groundwater from the pumping well 34 to the groundwater evaporator 31, and then the drainage device 33 drains the groundwater back to the return well. The pumping well 34 and the return well are different wells.

[0042] Implementation 2, others:

[0043] 1. Installation and commissioning: According to the actual layout and needs of the industrial site, reasonably install the groundwater intake device and the recharging device to ensure the normal operation of the groundwater circulation system. At the same time, install the various components of the main medium circulation system and connect the control system 40 for overall commissioning.

[0044] 2 Operation control: The upper and lower limits of the indoor temperature are set by the control system 40, and the system automatically determines and switches the cooling mode according to the real-time temperature monitoring data. In the groundwater cooling mode, the groundwater quality and water quantity are regularly monitored to ensure the normal operation of water intake and recharging; in the Freon cooling mode, the operating status of the compressor 21, condenser 24 and other components is regularly checked to ensure the stability of the Freon refrigeration cycle.

[0045] 3. Maintenance: Clean the filter of the auxiliary medium circulation system regularly to prevent impurities from clogging the pipes and groundwater evaporator 31; perform pressure detection and refrigerant replenishment on the main medium circulation system to ensure its normal operation. At the same time, perform software updates and hardware maintenance on the control system 40 to ensure the control accuracy and reliability of the system.

[0046] Regardless of the first or second embodiment, in the specific structure of the cabinet 10, as shown in FIG. Figure 3As shown, the cabinet 10 is divided into two upper and lower chambers, the Freon evaporator 25 and the groundwater source evaporator are accommodated in the upper chamber 11, the Freon evaporator 25 and the groundwater evaporator 31 are stacked, and the indoor normal temperature air first passes through the groundwater evaporator 31, and then passes through the Freon evaporator 25, achieving the effect of double refrigeration, gradual cooling or heating, the groundwater evaporator 31 is arranged outside the Freon evaporator 25, and the fan 13 is arranged in the middle of the Freon evaporator 25, and the indoor normal temperature air passes through the groundwater evaporator 31, and then passes through the Freon evaporator 25, and is discharged by the fan 13;

[0047] The compressor 21, gas-liquid separator 22, expansion valve 23, condenser 24, liquid separator 26, and four-way valve 27 are accommodated in the lower chamber 12, forming a passage between them. The four-way valve 27 switches the circuit to achieve the conversion between the cooling and heating modes.

[0048] The working principle of freon cooling or heating in this case: The technical solution of this case, the principle of cooling or heating is the same as that of traditional air conditioners, that is, there are four processes, compression process, condensation process, throttling process and evaporation process, such as Figure 6 and Figure 7 As shown,

[0049] The refrigeration mode cycle process is: compressor 21-four-way valve 27-condenser 24-expansion valve 23-liquid separator 26-evaporator-four-way valve 27-gas-liquid separator 22-compressor 21;

[0050] The heating mode cycle is: compressor 21 - four-way valve 27 - evaporator - liquid separator 26 - expansion valve 23 - condenser 24 - four-way valve 27 - gas-liquid separator 22 - compressor 21;

[0051] The switching between the cooling and heating modes is achieved by operating the four-way valve 27 .

[0052] like Figure 3As shown, preferably, the Freon evaporator 25 includes a Freon circulation pipe 251 and a Freon fin 252, the Freon circulation pipe 251 is arranged in a serpentine shape and is bent into a U shape as a whole, the Freon fin 252 is arranged on the Freon circulation pipe 251, one end of the Freon circulation pipe 251 is connected to the splitter, and the other end is connected to the four-way valve 27, the groundwater evaporator 31 includes a groundwater circulation pipe and groundwater fins 312, the groundwater circulation pipe 311 is arranged in a serpentine shape and is bent into a U shape as a whole, the groundwater fin 312 is arranged on the groundwater circulation pipe 311, the inlet of the groundwater circulation pipe is connected to the groundwater inlet 313, the outlet of the groundwater circulation pipe 311 is connected to the groundwater outlet 314, the water supply device 32 is connected to the groundwater inlet 313, and the drainage device 33 is connected to the groundwater outlet 314. The serpentine arrangement of the Freon circulation pipe 251 or the groundwater circulation pipe 311 increases the residence time of the refrigerant in the evaporator, allowing it to evaporate more fully, thereby improving the refrigeration efficiency. At the same time, the U-shaped pipe can also increase the heat exchange area between the refrigerant and the indoor air, further improving the refrigeration effect.

[0053] like Figure 8 As shown, compared with the above-mentioned U-shaped tube plus fin groundwater evaporator 31, considering the problem of impurities (such as gravel) in the groundwater source, the resistance in the U-shaped tube groundwater evaporator 31 is relatively large, and impurities are easily accumulated on the curved tube wall. The long-term accumulation causes the problem of blockage. A water curtain type groundwater evaporator 31 can also be designed, referring to Figure 8 , including a U-shaped water curtain chamber 36, the outer side and the inner side of the U-shaped water curtain chamber 36 are both provided with ventilation holes, a plurality of groundwater inlets 313 are arranged on the top of the U-shaped water curtain chamber 36, a water curtain type groundwater evaporator 31, multiple pipelines, the upper end of the U-shaped water curtain chamber 36 enters, and then flows back at the lower end, the resistance is greatly reduced, the groundwater pours down in the U-shaped water curtain chamber 36, the contact area with the air is increased, and the heat exchange effect with the air is further improved;

[0054] The water curtain type groundwater evaporator 31, further, the end of the pipeline of the groundwater inlet 313 can be set as a nozzle, and the groundwater is sprayed in the U-shaped water curtain chamber 36 by the nozzle. When the groundwater is sprayed at high pressure and high speed, the temperature will be further reduced, and in the cooling mode, the cooling effect can be further provided;

[0055] In addition, in order to prevent the problem of impurity accumulation, a detachable bell-mouth filter is provided on the groundwater outlet 314. The upper end of the bell-mouth filter is threadedly connected to the outlet pipe, and a filter net is provided inside. It is disassembled regularly to clean the internal impurities to prevent the impurities from accumulating and blocking the pipe.

[0056] like Figure 3As shown, the fan 13 is vertically arranged, the air inlet of the fan 13 is located on two side surfaces, and the air outlet of the fan 13 faces the upper end.

[0057] like Figure 1 and Figure 2 The three sides of the upper chamber 11 of the cabinet 10 are provided with air inlet windows 14, and the air inlet windows 14 correspond to the side surfaces and the bottom surface of the evaporator.

[0058] Working Principle: When the dual medium air conditioning system is used,

[0059] When the groundwater temperature is lower than the temperature of normal air and groundwater is used for low-temperature refrigeration, under normal working conditions, the auxiliary medium circulation system is started first, and groundwater is extracted through the water intake device and sent to the groundwater evaporator 31 by the water delivery device 32 to exchange heat with the indoor hot air to achieve preliminary refrigeration. When the indoor temperature drops to a certain level and the refrigeration demand is small, it can be met by groundwater refrigeration alone. If the indoor heat increases significantly and groundwater refrigeration cannot meet the demand, the control system 40 automatically starts the main medium circulation system, and the two work together to ensure that the indoor temperature is stable within the set range. At the same time, in the Freon refrigeration cycle, the compressor 21 compresses the Freon gas, causing it to release heat and liquefy in the condenser 24, and the groundwater is sent into the condenser 24 through the water delivery device 32 to cool the Freon. After throttling and reducing the pressure by the expansion valve 23, it absorbs indoor heat and vaporizes in the evaporator to complete the refrigeration cycle.

[0060] When the groundwater temperature is higher than the temperature of normal air and the high temperature of groundwater is used for heating, the Freon circuit is switched through the four-way valve 27 to realize the process of heat release by the Freon evaporator 25 and heating by the condenser 24. At this time, groundwater is extracted through the water intake device and sent to the groundwater evaporator 31 by the water delivery device 32 to exchange heat with the indoor hot air, thereby realizing preliminary heating. At the same time, in the Freon heating cycle, the compressor 21 compresses the Freon gas, causing it to release heat and liquefy in the evaporator, and then the groundwater assists in heating in the condenser 24 to complete the heating cycle.

[0061] In the above technical solution, the control system 40 can also be manually operated to manually switch and switch the main medium circulation system and the auxiliary medium circulation system, or switch the cooling and heating modes.

[0062] To sum up, this dual-media air-conditioning system has a dual cooling and heating system of Freon and water source. It can reasonably utilize the factory's recycled water (low-temperature water or high-temperature water) according to the actual situation of the application factory, especially the rational use of low-temperature thermal energy of groundwater, reduce the use of Freon, achieve efficient cooling and heating, and reduce damage to the atmospheric ozone layer. At the same time, groundwater reinjection can reduce the impact on groundwater resources and play a role in energy saving and consumption reduction. The dual cooling and heating modes complement each other and are not affected by the limitations of single cooling and heating methods. They can adapt to different working conditions and environmental conditions to ensure the stability of the industrial production environment with a higher stability.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-media air conditioning system, characterized in that: The invention comprises a main medium circulation system, an auxiliary medium circulation system, and a control system (40), and also comprises a cabinet (10), wherein the main medium circulation system, the auxiliary medium circulation system, and the control system (40) are integrated in the cabinet (10), and the main medium circulation system and the auxiliary medium circulation system are electrically connected to the control system (40), and under the control of the control system (40), the cooling or heating operation of the air-conditioning equipment is realized.

2. A dual-medium air conditioning system according to claim 1, characterized in that: The medium flowing in the main medium circulation system is Freon, and the main medium circulation system comprises a compressor (21), an expansion valve (23), a condenser (24) and a Freon evaporator (25). The medium flowing in the auxiliary medium circulation system is a water source, and the medium flowing in the condenser (24) of the main medium circulation system is a water source. The auxiliary medium circulation system comprises a water source evaporator, a water supply device (32) and a drainage device (33). The water supply device (32) and the drainage device (33) are respectively connected to the inlet and outlet of the water source evaporator and the condenser (24) through pipelines.

3. A dual-medium air conditioning system according to claim 2, characterized in that: The water source is groundwater, and the water source evaporator is a groundwater evaporator (31).

4. A dual-medium air conditioning system according to claim 3, characterized in that: The cabinet (10) is divided into two upper and lower chambers. The freon evaporator (25) and the groundwater evaporator (31) are accommodated in the upper chamber (11). The freon evaporator (25) and the groundwater evaporator (31) are stacked. The groundwater evaporator (31) is arranged outside the freon evaporator (25). A fan (13) is arranged in the middle of the freon evaporator (25). Indoor normal temperature air passes through the groundwater evaporator (31) and the freon evaporator (25) and is discharged by the fan (13). The main medium circulation system further comprises a gas-liquid separator (22), a liquid separator head (26) and a four-way valve (27). The compressor (21), the gas-liquid separator (22), the expansion valve (23), the condenser (24), the liquid separator head (26) and the four-way valve (27) are accommodated in the lower chamber (12) and form a passage therebetween. The four-way valve (27) switches the circuit to realize the conversion between the cooling mode and the heating mode.

5. A dual-medium air conditioning system according to claim 4, characterized in that: The Freon evaporator (25) comprises a Freon circulation pipe (251) and a Freon fin (252); the Freon circulation pipe (251) is arranged in a serpentine shape and is bent into a U shape as a whole; the Freon fin (252) is arranged on the Freon circulation pipe (251); one end of the Freon circulation pipe (251) is connected to a splitter head (26), and the other end is connected to a four-way valve (27).

6. A dual-medium air conditioning system according to claim 5, characterized in that: The groundwater evaporator (31) comprises a groundwater circulation pipe (311) and groundwater fins (312); the groundwater circulation pipe (311) is arranged in a serpentine shape and is bent into a U shape as a whole; the groundwater fins (312) are arranged on the groundwater circulation pipe (311); the inlet of the groundwater circulation pipe (311) is connected to the groundwater inlet (313); the outlet of the groundwater circulation pipe (311) is connected to the groundwater outlet (314); the water supply device is connected to the groundwater inlet (313); and the drainage device is connected to the groundwater outlet (314).

7. A dual-medium air conditioning system according to claim 5, characterized in that: The groundwater evaporator (31) comprises a U-shaped water curtain chamber (36), the outer side and the inner side of the U-shaped water curtain chamber (36) are both provided with ventilation holes, a plurality of groundwater inlets (313) are arranged at the top of the U-shaped water curtain chamber (36), and a plurality of groundwater outlets (314) are arranged at the bottom.

8. A dual-medium air conditioning system according to any one of claims 6-7, characterized in that: The fan (13) is arranged vertically, the air inlet of the fan (13) is located on two side surfaces, and the air outlet of the fan (13) faces the upper end.

9. A dual-medium air conditioning system according to any one of claims 6-7, characterized in that: Air inlet windows (14) are provided on three sides of the upper chamber of the cabinet (10), and the air inlet windows (14) correspond to the side surfaces and the bottom surface of the evaporator.

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