Patent Publication Number: US-2020292184-A1

Title: Water-cooled air conditioning system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is based on and claims the benefit of priority from Chinese Patent Application No. CN 201910180921.3 filed on Mar. 11, 2019, the contents of which are incorporated by reference herein in their entirety. 
     FIELD 
     The disclosure relates to the field of air conditioning, and particularly, to a water-cooled air conditioning system. 
     BACKGROUND 
     At present, for the traditional air-cooled air conditioning system, a refrigerant is evaporated and cooled in the evaporator, then the low-temperature and low-pressure gaseous refrigerant is compressed into the high-temperature and high-pressure gaseous refrigerant by the compressor, and then the high-temperature and high-pressure gaseous refrigerant is cooled into the high-temperature and high-pressure liquid refrigerant by passing through the condenser, which passes through an expansion valve causing reduction both in pressure and temperature so as to change into the low-temperature and low-pressure liquid refrigerant, and then enters the evaporator to start a next cycle. In the construction industry, the demand for air conditioning is particularly strong. According to statistics, China&#39;s building energy consumption accounts for about 35% of the national energy consumption, and air conditioning energy consumption accounts for 50% to 60% of the building energy consumption, which is extremely high. 
     SUMMARY 
     The disclosure is intended to solve one of the technical problems above in related art to some extent. Therefore, the disclosure provides a water-cooled air conditioning system reducing energy consumption. 
     According to the disclosure, there is provided a water-cooled air conditioning system, comprising: an evaporator, 
     a compressor communicated with the evaporator through a first feed pipe, 
     a condenser, 
     an expansion valve communicated with the condenser through a second feed pipe and communicated with the evaporator through a third feed pipe, 
     a cooling well, 
     a cooling loop arranged between, and respectively communicated with, the compressor and the condenser, and the cooling loop comprising: 
     a discharge section communicated with the compressor, the discharge section being provided with a first valve; 
     a feed section communicated with the condenser, the feed section being provided with a second valve; and 
     a cooling section extending into the cooling well; 
     a recovery well, and 
     a recovery pipe arranged between the cooling well and the recovery well, the recovery pipe being provided with a recovery pump. 
     In some embodiments, the water-cooled air conditioning system further comprises a fan arranged at any side of the evaporator, wherein the condenser is communicated with the compressor through a fourth feed pipe, so that the evaporator, the compressor, the condenser and the expansion valve form a refrigerant loop for a refrigerant to flow, the cooling loop is communicated with the refrigerant loop through the discharge section and the feed section. 
     In some embodiments, a third valve is arranged between the compressor and the evaporator. 
     In some embodiments, one end of the recovery pipe inserted into the cooling well is arranged on a surface layer of the cooling well. 
     In some embodiments, the recovery pipe extends 20 m below a water surface where the cooling well is located. 
     In some embodiments, the cooling section extends into a surface layer of the cooling well. 
     The disclosure has the beneficial effects that: before entering the condenser, a refrigerant is cooled by well water to reduce the temperature of the refrigerant, and then the refrigerant enters the condenser for condensation, thus eliminating a fan of the condenser and reducing an energy consumption of the whole air conditioning system. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure is further described hereinafter with reference to the drawing according to an embodiment. 
         FIG. 1  is a diagram of a mounting structure according to an embodiment of the disclosure. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     With reference to  FIG. 1 , a water-cooled air conditioning system according to the disclosure comprises an evaporator  200 , a compressor  300 , a condenser  500 , an expansion valve  400 , feed pipes  100 , a cooling loop  700 , a cooling well  800  and a recovery well  900 . The compressor  300  and the evaporator  200 , the condenser  500  and the expansion valve  400 , as well as the expansion valve  400  and the evaporator  200  are all communicated through the feed pipes  100 . The cooling loop  700  is arranged between the compressor  300  and the condenser  500 , and is respectively communicated with the compressor  300  and the condenser  500 . The cooling loop  700  comprises a discharge section  710 , a feed section  720  and a cooling section  730 . The cooling section  730  extends into the cooling well  800 , the discharge section  710  is communicated with the compressor  300 , the feed section  720  is communicated with the evaporator  200 . The discharge section  710  is provided with a first valve  711 , and the feed section  720  is provided with a second valve  721 . A recovery pipe  810 , which is provided with a recovery pump  811 , is arranged between the cooling well  800  and the recovery well  900 . 
     A refrigerant is evaporated and cooled in the evaporator  200  during use, and then the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the compressor  300 , then the high-temperature and high-pressure gaseous refrigerant passes through the condenser  500  and is cooled into a high-temperature and high-pressure liquid refrigerant. Before entering the condenser  500 , the refrigerant firstly enters well water through the cooling loop  700  for cooling. Since the well water has a temperature much lower than that of air, the refrigerant may be cooled by heat exchange in the well water, then enters the condenser  500  under a pressure of the compressor  300  for further cooling. The liquid refrigerant then passes through the expansion valve  400  causing reduction both in pressure and temperature to change into a low-temperature and low-pressure liquid refrigerant, and then enters the evaporator  200  to start a next cycle. 
     Before entering the condenser  500 , the refrigerant is firstly cooled by the well water to reduce the temperature of the refrigerant, and then enters the condenser  500  for condensation, thus eliminating a fan  600  of the condenser  500  and reducing energy consumption of the whole air conditioning system. 
     In addition, the refrigerant is introduced into the well water instead of pumping out the well water and cooling the refrigerant in the air conditioner, thus saving the water pump for pumping out the well water and reducing the energy consumption. 
     As an improvement to the technical solution above, the water-cooled air conditioning system further comprises a fan  600 , wherein the evaporator  200  and the compressor  300  are also communicated through the feed pipe  100 , so that the compressor  300 , the evaporator  200 , the condenser  500  and the expansion valve  400  form a refrigerant loop for a refrigerant to flow, the cooling loop  700  is communicated with the refrigerant loop through the discharge section  710  and the feed section  720 , and the fan  600  is arranged at any side of the evaporator. 
     As an improvement to the technical solution above, a third valve  110  may be arranged between the compressor  300  and the condenser  500 . 
     In actual operation, the refrigerant can be cooled by the well water in the cooling well by closing the third valve  110 , and opening the first valve  711  and the second valve  721 . In case that further cooling of the refrigerant is required, the fan  600  is opened to blow cold air to the condenser  500  when the refrigerant is returned to the condenser  500  and further cool the refrigerant. 
     In addition, when only the fan  600  is required to cool the refrigerant, the first valve  711  and the second valve  721  are closed, and the third valve  110  is opened, which is convenient for the user to switch. 
     In some embodiments, one end of the recovery pipe  810  inserted into the cooling well  800  is arranged on a surface layer of the cooling well  800 . 
     When hot refrigerant enters the well water, the well water may be heated, and hot well water may float up to the surface. Therefore, the hot water needs to be guided from the surface of the cooling well  800  to the recovery well  900  to prevent the hot well water from affecting the cooling effect. 
     In some embodiments, the recovery pipe  810  may extend 20 m below a water surface where the cooling well  800  is located. 
     When used in the south, since an underground water level in the south is 4 m on average, the recovery pipe  810  needs to go 20 m underground to ensure that the water on the surface of the well can be pumped out. 
     In some embodiments, the cooling section  730  extends into a surface layer of the cooling well  800 . 
     Cooling is directly performed on the surface layer to reduce the distance traveled by the refrigerant and reduce the energy consumption. 
     The specific structure and size data above describe the preferred embodiments of the disclosure in detail, but the disclosure is not limited to these embodiments; those skilled in the art may make various modifications or replacements without departing from the principle of the disclosure, and these modifications or replacements are all included in the scope limited by the claims of the application.