A continuous heat refrigeration system and method using heat energy of an oil-injected screw air compressor

Abstract

The application relates to a continuous heat refrigeration system and method using the heat energy of an oil-injected screw air compressor, which comprises a generator and a condenser, the generator comprises a heating box and a gasification box, one end of the heating box is provided with a heat source inlet, the end of the heating box far from the heat source inlet is provided with a heat source outlet, a solution inlet pipe is fixedly connected to one end of the heating box close to the heat source inlet, a plurality of first shunt pipes and second shunt pipes are fixedly connected to the two ends of the solution inlet pipe respectively, and a plurality of first heat exchange fins are fixedly connected to one side in the heating box. The application uses ammonia water solution as refrigerant, the boiling point of ammonia is -33 degrees, so during use, low-grade heat sources between 50-95 DEG C can be recycled and used to output chilled water, which can be used in industrial production of chilled water, air conditioner refrigeration, special industry on-site cooling and other production and living site applications, and completely covers the application sites which cannot be realized by lithium bromide refrigeration technology.

Description

Technical Field

[0001] This invention relates to the field of heat recovery, and in particular to a continuous thermal cooling system and method utilizing the thermal energy of an oil-injected screw air compressor. Background Technology

[0002] Air compressors are mainly divided into three types: centrifugal air compressors, oil-free screw air compressors, and oil-injected screw air compressors. Oil-injected screw air compressors generate low-grade heat sources between 50 and 95°C during operation. The air compressor cooling system removes the heat of compression through air cooling or water cooling to maintain the normal operation of the air compressor.

[0003] In the past decade or so, with the continuous maturation of heat pump technology, the market now uses heat pump technology to absorb low-grade heat and output high-grade hot water. However, when the hot water is unusable, this heat energy can only continue to be released into the atmosphere. In southern China or Southeast Asia, as well as in special industries such as tunnel engineering, the demand for heat is not large, but the demand for cooling is very large. Currently, there are two main types of methods for converting waste heat into cooling: lithium bromide absorption refrigeration and lithium bromide direct-fired refrigeration. However, they require a heat source temperature of no less than 85°C, so most of the heat generated by oil-injected screw air compressors cannot be converted into cooling. Summary of the Invention

[0004] In response to the aforementioned technologies, a continuous thermal cooling system and method utilizing the thermal energy of an oil-injected screw air compressor are proposed.

[0005] The purpose of this application is to provide a continuous thermal cooling system and method utilizing the thermal energy of an oil-injected screw air compressor to solve the problems mentioned in the background art.

[0006] This application provides a continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor, employing the following technical solution: It includes a generator and a condenser. The generator comprises a heating chamber and a vaporization chamber. One end of the heating chamber has a heat source inlet, and the other end away from the heat source inlet has a heat source outlet. A solution inlet pipe is fixedly connected to the end of the heating chamber near the heat source inlet. One end of the solution inlet pipe is fixedly connected to multiple first branch pipes and multiple second branch pipes via two branch pipes. Multiple first heat exchange fins are fixedly connected to one side of the interior of the heating chamber. One of the first heat exchange fins closest to the solution inlet pipe is fixedly connected to multiple first branch pipes. Multiple second heat exchange plates are fixedly connected to one side of the first heat exchange plate. One of the multiple second heat exchange plates, which is closer to the solution inlet pipe, is fixedly connected to multiple second branch pipes. Two adjacent first heat exchange plates and two adjacent second heat exchange plates are connected by multiple connecting pipes. One end of the heating box, which is closer to the heat source outlet, is fixedly connected to a solution outlet pipe. One end of one of the multiple first heat exchange plates, which is closer to the solution outlet pipe, is fixedly connected to multiple first manifolds. One end of one of the multiple second heat exchange plates, which is closer to the solution outlet pipe, is fixedly connected to multiple second manifolds. The multiple first manifolds and the multiple second manifolds are all fixedly connected to the solution outlet pipe.

[0007] By adopting the above technical solution, the concentrated solution is dispersed to multiple first heat exchange plates and second heat exchange plates in the heating box through the first and second split pipes, and multiple sets of heat exchange channels are formed in series through connecting pipes. This increases the contact area and heat exchange time between the solution and the heat source during use, allowing the solution to fully absorb the heat from the heat source, thereby improving the heat exchange efficiency and the utilization rate of the heat source.

[0008] Preferably, the solution outlet pipe is fixedly connected to the vaporization box, a pressure gauge is installed in the middle of the solution outlet pipe, multiple guide plates are fixedly connected inside the vaporization box, a high-temperature ammonia vapor pipe is fixedly installed at the upper end of the vaporization box, and a dilute solution outlet pipe is fixedly installed at the lower end of the vaporization box.

[0009] By adopting the above technical solution, after the heated solution enters the vaporization box, the flow rate slows down under the guidance of the baffle plate, so that the solution can fully contact the space and escape more thoroughly from the solution, providing sufficient high-temperature and high-pressure ammonia vapor for the condenser, and further improving the subsequent cooling capacity.

[0010] Preferably, the condenser is provided with a condenser tube, one end of the high-temperature ammonia vapor tube extends into the condenser and is fixedly connected to the condenser tube, one end of the condenser tube is fixedly connected to a connecting pipe, a throttle valve is fixedly installed in the middle of the connecting pipe, and two first cooling water pipes are fixedly connected inside the condenser. One of the two first cooling water pipes, the one closest to the high-temperature ammonia vapor tube, is fixedly connected to a first cooling water tank at one end and a second pump body is fixedly installed in the middle.

[0011] By adopting the above technical solution, high-temperature ammonia vapor enters the condenser tube during use. At the same time, the second pump body is started to deliver cooling water to the first cooling water pipe in the condenser to exchange heat with the high-temperature ammonia vapor, thereby condensing the high-temperature ammonia vapor into high-pressure liquid ammonia. The high-pressure liquid ammonia is delivered to the throttling valve through the connecting pipe. Through the throttling effect, its pressure and temperature are reduced significantly, forming a low-pressure, low-temperature gas-liquid mixture of ammonia.

[0012] Preferably, an evaporator is fixedly connected to the end of the connecting pipe away from the condenser, a low-pressure ammonia vapor pipe is fixedly connected to the end of the evaporator away from the connecting pipe, a refrigerant pipe is fixedly connected inside the evaporator, and the inlet and outlet of the refrigerant pipe are both located outside the evaporator.

[0013] By adopting the above technical solution, the low-pressure, low-temperature gas-liquid mixture of ammonia will enter the evaporator during use and evaporate inside the evaporator, while absorbing the heat of the refrigerant in the refrigerant tube inside the evaporator.

[0014] Preferably, an absorber is fixedly connected to the end of the low-pressure ammonia vapor pipe away from the evaporator, and multiple gas outlets are fixedly connected to the surface of the end of the low-pressure ammonia vapor pipe that extends into the absorber. One end of the dilute solution outlet pipe is fixedly connected to the absorber and a first pump body is fixedly installed in the middle. An installation pipe is fixedly connected to the end of the dilute solution outlet pipe that extends into the absorber, and multiple nozzles are fixedly connected to the surface of the installation pipe.

[0015] By adopting the above technical solution, when in use, the first pump body is started to pressurize the dilute solution flowing out of the vaporization box and then spray it out through the dilute solution outlet pipe and multiple nozzles on the installation pipe.

[0016] Preferably, a second cooling water pipe is fixedly connected inside the absorber, one end of the second cooling water pipe is fixedly connected to a second cooling water tank and a third pump body is fixedly installed in the middle, and a concentrated solution pipe is fixedly connected inside the absorber.

[0017] By adopting the above technical solution, the third pump body is started to transport the cooling water in the second cooling water tank to the second cooling water pipe. The cooling water will absorb the heat released during the process of the dilute solution absorbing low-pressure ammonia vapor.

[0018] Preferably, a storage tank is fixedly connected to the end of the concentrated solution tube away from the absorber, the lower end of the storage tank is fixedly connected to the solution inlet pipe, and a fourth pump body is fixedly installed in the middle of the solution inlet pipe;

[0019] By adopting the above technical solution, the fourth pump body is started to pump the concentrated solution in the storage tank back into the heating box, completing the cycle of the entire thermal cooling system and realizing continuous cooling.

[0020] This application also provides a method for a continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor, comprising the following steps:

[0021] S1. A high-concentration ammonia solution is added to the storage tank. When in use, the fourth pump is started first. The concentrated ammonia solution in the storage tank is driven by the fourth pump and enters the heating box through the solution inlet pipe. It is then distributed to multiple first and second heat exchange plates in the heating box through the first and second split pipes, respectively. The high-temperature waste heat of the oil-injected screw air compressor is connected to the heat source inlet and enters the heating box to exchange heat with the concentrated solution in the first and second heat exchange plates. The low-temperature heat source after heat exchange is discharged from the heat source outlet. The concentrated solution absorbs heat in the first and second heat exchange plates and its temperature rises. It flows sequentially through the connecting pipe between adjacent first and second heat exchange plates and finally converges into the solution outlet pipe through the first and second manifolds. The pressure gauge can monitor the pressure of the heated solution in real time.

[0022] S2. The heated solution enters the vaporization box through the solution outlet pipe. Under the guidance of multiple guide plates in the vaporization box, the solution flow rate slows down and makes full contact with the space. The ammonia in it evaporates into a large amount of high temperature and high pressure ammonia vapor due to heat absorption. The high temperature ammonia vapor is discharged from the high temperature ammonia vapor pipe at the top of the vaporization box and enters the condenser. The remaining low ammonia content dilute solution flows to the absorber from the dilute solution outlet pipe at the bottom of the vaporization box.

[0023] S3. High-temperature ammonia vapor enters the condenser tube of the condenser through the high-temperature ammonia vapor pipe. At the same time, the second pump delivers cooling water from the first cooling water tank to the first cooling water pipe in the condenser. The cooling water exchanges heat with the ammonia vapor in the condenser tube, and the ammonia vapor condenses into high-pressure liquid ammonia.

[0024] S4. The condensed high-pressure liquid ammonia is transported to the throttling valve through the connecting pipe. The throttling effect reduces its pressure and temperature, forming a low-pressure, low-temperature gas-liquid mixture of ammonia. This low-pressure, low-temperature gas-liquid mixture of ammonia enters the evaporator through the connecting pipe and evaporates inside the evaporator, completely evaporating into low-pressure ammonia vapor. At the same time, it absorbs heat from the refrigerant in the refrigerant pipe inside the evaporator. The cooled refrigerant is discharged from the refrigerant pipe outlet and used in scenarios requiring refrigeration.

[0025] S5. The low-pressure ammonia vapor generated in the evaporator enters the absorber through the low-pressure ammonia vapor pipe and is evenly dispersed through multiple outlets at the pipe end. At the same time, the first pump body is activated to pressurize the dilute solution flowing out of the vaporization box and spray it out through multiple nozzles on the installation pipe via the dilute solution outlet pipe, making full contact with the low-pressure ammonia vapor. The sprayed dilute solution accumulates at the lower end of the absorber until it submerges the outlet. The low-pressure ammonia vapor sprayed from the outlet will then further contact the dilute solution, which absorbs the low-pressure ammonia vapor to form a concentrated ammonia solution. The heat released during the absorption process is carried away by the cooling water in the second cooling water pipe delivered by the third pump body. The cooling water comes from the second cooling water tank and is discharged after absorbing heat. The concentrated solution in the absorber flows into the storage tank through the concentrated solution pipe and is then pumped back into the heating box by the fourth pump body, completing the cycle of the entire thermal refrigeration system and achieving continuous refrigeration.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. This invention provides a continuous thermal cooling system and method utilizing the thermal energy of an oil-injected screw air compressor. The invention uses an ammonia solution as a refrigerant. Because ammonia has a boiling point of -33 degrees Celsius, it can recover and utilize low-grade heat sources between 50 and 95 degrees Celsius and output chilled water. This system can be used for industrial chilled water, air conditioning, and on-site cooling in special industries, completely covering applications that lithium bromide refrigeration technology cannot achieve.

[0028] 2. This invention provides a continuous thermal cooling system and method utilizing the thermal energy of an oil-injected screw air compressor. Inside the heating chamber, a concentrated solution is dispersed to multiple first and second heat exchange plates via a first and second branch pipe, and connected in series via connecting pipes to form multiple sets of heat exchange channels. This increases the contact area and heat exchange time between the solution and the heat source, allowing the solution to fully absorb heat and improving heat exchange efficiency, thereby increasing heat source utilization. After heating, the solution enters the vaporization chamber, where its flow rate slows down under the guidance of a baffle plate, ensuring thorough contact between the solution and the surrounding space before escaping. This provides sufficient high-temperature, high-pressure ammonia vapor for the condenser, further enhancing subsequent cooling capacity. Attached Figure Description

[0029] Figure 1 This is a schematic diagram illustrating the working principle of the present invention;

[0030] Figure 2 This is a schematic diagram of the internal structure of the heating box of the present invention;

[0031] Figure 3 This is a schematic diagram of the internal structure of the vaporization box of the present invention;

[0032] Figure 4 This is a schematic diagram of the nozzle installation position according to the present invention.

[0033] The components are as follows: 1. Generator; 101. Heating box; 102. Vaporization box; 103. Heat source inlet; 104. Heat source outlet; 105. Solution inlet pipe; 106. Second branch pipe; 107. First branch pipe; 108. First heat exchanger; 109. Second heat exchanger; 110. Connecting pipe; 111. First manifold; 112. Second manifold; 113. Solution outlet pipe; 114. Pressure gauge; 115. High-temperature ammonia vapor pipe; 116. Baffle plate; 117. Dilute solution. 1. Outlet pipe; 118. First pump body; 2. Condenser; 3. Condenser pipe; 4. Connecting pipe; 5. Throttling valve; 6. First cooling water tank; 7. First cooling water pipe; 8. Second pump body; 9. Evaporator; 10. Refrigerant pipe; 11. Low-pressure ammonia vapor pipe; 12. Absorber; 13. Second cooling water tank; 14. Third pump body; 15. Second cooling water pipe; 16. Concentrated solution pipe; 17. Storage tank; 18. Fourth pump body; 19. Installation pipe; 20. Nozzle; 21. Gas outlet. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail below.

[0035] Example 1: A continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor, referring to... Figure 1 , Figure 2 and Figure 3The system includes a generator 1 and a condenser 2. The generator 1 includes a heating chamber 101 and a vaporization chamber 102. One end of the heating chamber 101 is provided with a heat source inlet 103, and the other end of the heating chamber 101 away from the heat source inlet 103 is provided with a heat source outlet 104. A solution inlet pipe 105 is fixedly connected to the end of the heating chamber 101 near the heat source inlet 103. One end of the solution inlet pipe 105 is fixedly connected to multiple first branch pipes 106 and multiple second branch pipes 107 through two branch pipes. Multiple first heat exchange plates 108 are fixedly connected to one side of the interior of the heating chamber 101. One of the multiple first heat exchange plates 108 is located near the solution inlet pipe 105. The heat exchange plate 108 is fixedly connected to multiple first diversion pipes 106. Multiple second heat exchange plates 109 are fixedly connected to the side of the heating chamber 101 away from the first heat exchange plate 108. One of the second heat exchange plates 109, closest to the solution inlet pipe 105, is fixedly connected to multiple second diversion pipes 107. Two adjacent first heat exchange plates 108 and two adjacent second heat exchange plates 109 are connected by multiple connecting pipes 110. A solution outlet pipe 113 is fixedly connected to the end of the heating chamber 101 near the heat source outlet 104. One of the first heat exchange plates 108, closest to the solution outlet pipe 113, is... One end of the 08 is fixedly connected to multiple first manifolds 111. One end of one of the multiple second heat exchange plates 109, which is closest to the solution outlet pipe 113, is fixedly connected to multiple second manifolds 112. Both the multiple first manifolds 111 and the multiple second manifolds 112 are fixedly connected to the solution outlet pipe 113. Inside the heating box 101, the concentrated solution is dispersed to the multiple first heat exchange plates 108 and second heat exchange plates 109 through the first diversion pipe 106 and the second diversion pipe 107. These are connected in series through the connecting pipe 110 to form multiple sets of heat exchange channels. This increases the contact area and heat exchange time between the solution and the heat source during use, allowing the solution to fully absorb the heat source. Heat can improve heat exchange efficiency, thereby improving the utilization rate of heat source. The solution outlet pipe 113 is fixedly connected to the vaporization box 102. A pressure gauge 114 is installed in the middle of the solution outlet pipe 113. Multiple guide plates 116 are fixedly connected inside the vaporization box 102. A high-temperature ammonia vapor pipe 115 is fixedly installed at the upper end of the vaporization box 102. A dilute solution outlet pipe 117 is fixedly installed at the lower end of the vaporization box 102. After the heated solution enters the vaporization box 102, the flow rate slows down under the guidance of the guide plate 116, so that the solution can fully contact the space and escape from the solution more thoroughly, providing sufficient high-temperature and high-pressure ammonia vapor for the condenser 2, further improving the subsequent cooling capacity.

[0036] Condenser 2 is internally equipped with condenser tubes 3. One end of a high-temperature ammonia vapor pipe 115 extends into condenser 2 and is fixedly connected to condenser tube 3. One end of condenser tube 3 is fixedly connected to a connecting pipe 4, and a throttling valve 5 is fixedly installed in the middle of the connecting pipe 4. Two first cooling water pipes 7 are fixedly connected inside condenser 2. One of the first cooling water pipes 7, closer to the high-temperature ammonia vapor pipe 115, is fixedly connected to a first cooling water tank 6 at one end and has a second pump body 8 fixedly installed in the middle. During use, high-temperature ammonia vapor enters condenser tube 3, and at the same time, the second pump body 8 is activated to deliver cooling water to the first cooling water pipe 7 inside condenser 2 for heat exchange with the high-temperature ammonia vapor, thereby... High-temperature ammonia vapor condenses into high-pressure liquid ammonia. The high-pressure liquid ammonia is transported to the throttling valve 5 through the connecting pipe 4. The throttling effect reduces its pressure and temperature significantly, forming a low-pressure, low-temperature gas-liquid mixture of ammonia. An evaporator 9 is fixedly connected to the end of the connecting pipe 4 away from the condenser 2. A low-pressure ammonia vapor pipe 11 is fixedly connected to the end of the evaporator 9 away from the connecting pipe 4. A refrigerant pipe 10 is fixedly connected inside the evaporator 9. The inlet and outlet of the refrigerant pipe 10 are both outside the evaporator 9. During use, the low-pressure, low-temperature gas-liquid mixture of ammonia enters the evaporator 9 and evaporates inside the evaporator 9, while absorbing heat from the refrigerant in the refrigerant pipe 10 inside the evaporator 9.

[0037] Example 2: A continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor, referring to... Figure 1 and Figure 4 A low-pressure ammonia vapor pipe 11 is fixedly connected to an absorber 12 at one end away from the evaporator 9. Multiple outlet heads 21 are fixedly connected to the surface of the end of the low-pressure ammonia vapor pipe 11 that extends into the absorber 12. A dilute solution outlet pipe 117 is fixedly connected to the absorber 12 at one end and has a first pump body 118 fixedly installed in the middle. An installation pipe 19 is fixedly connected to the end of the dilute solution outlet pipe 117 that extends into the absorber 12. Multiple nozzles 20 are fixedly connected to the surface of the installation pipe 19. During use, the first pump body 118 is activated to pressurize the dilute solution flowing from the vaporization box 102, which is then sprayed out through the dilute solution outlet pipe 117 and the multiple nozzles 20 on the installation pipe 19. A second cooling water pipe 15 is fixedly connected inside the absorber 12. A second cooling water tank 13 is fixedly connected to one end of the absorber 12, and a third pump body 14 is fixedly installed in the middle. A concentrated solution pipe 16 is fixedly connected inside the absorber 12. When the third pump body 14 is started, the cooling water in the second cooling water tank 13 is transported to the second cooling water pipe 15. The cooling water will absorb the heat released during the absorption of low-pressure ammonia vapor by the high water content of the dilute solution. A storage tank 17 is fixedly connected to the end of the concentrated solution pipe 16 away from the absorber 12. The lower end of the storage tank 17 is fixedly connected to the solution inlet pipe 105. A fourth pump body 18 is fixedly installed in the middle of the solution inlet pipe 105. When the fourth pump body 18 is started, the concentrated solution in the storage tank is pumped back into the heating box 101 to complete the cycle of the entire thermal cooling system and achieve continuous cooling.

[0038] This embodiment also proposes a method for a continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor, comprising the following steps:

[0039] S1. A high-concentration ammonia solution is added to the storage tank 17. When in use, the fourth pump body 18 is started first. The concentrated ammonia solution in the storage tank 17 is driven by the fourth pump body 18 and enters the heating box 101 through the solution inlet pipe 105. It is then distributed to multiple first heat exchange plates 108 and second heat exchange plates 109 in the heating box through the first diversion pipe 106 and the second diversion pipe 107 respectively. The high-temperature waste heat of the oil-injected screw air compressor is connected to the heat source inlet 103 and enters the heating box 101 to exchange heat with the concentrated solution in the first heat exchange plate 108 and the second heat exchange plate 109. The low-temperature heat source after heat exchange is discharged from the heat source outlet 104. The concentrated solution absorbs heat in the first heat exchange plate 108 and the second heat exchange plate 109 and its temperature rises. It flows sequentially through the connecting pipe 110 between adjacent first heat exchange plates 108 and second heat exchange plates 109 and finally converges into the solution outlet pipe 113 through the first manifold 111 and the second manifold 112. The pressure gauge 114 can monitor the pressure of the heated solution in real time.

[0040] S2. The heated solution enters the vaporization box 102 through the solution outlet pipe 113. Under the guidance of multiple guide plates 116 in the vaporization box 102, the solution flow rate slows down and makes full contact with the space. The ammonia in it evaporates into high temperature and high pressure ammonia vapor due to heat absorption. The high temperature ammonia vapor is discharged from the high temperature ammonia vapor pipe 115 at the top of the vaporization box 102 and enters the condenser 2. The remaining low ammonia content dilute solution flows from the dilute solution outlet pipe 117 at the bottom of the vaporization box to the absorber 12.

[0041] S3. High-temperature ammonia vapor enters the condenser tube 3 of condenser 2 through high-temperature ammonia vapor pipe 115. At the same time, the second pump body 8 delivers cooling water from the first cooling water tank 6 to the first cooling water pipe 7 in the condenser. The cooling water exchanges heat with the ammonia vapor in the condenser tube 3. The ammonia vapor releases heat and liquefies, while the cooling water absorbs heat and rises in temperature. The ammonia vapor condenses into high-pressure liquid ammonia.

[0042] S4. The condensed high-pressure liquid ammonia is transported to the throttling valve 5 through the connecting pipe 4. The throttling effect reduces its pressure and temperature, forming a low-pressure, low-temperature gas-liquid mixture of ammonia. The low-pressure, low-temperature gas-liquid mixture of ammonia enters the evaporator 9 through the connecting pipe 4 and evaporates inside the evaporator 9, completely evaporating into low-pressure ammonia vapor. At the same time, it absorbs the heat of the refrigerant in the refrigerant pipe 10 inside the evaporator 9. The cooled refrigerant is discharged from the refrigerant pipe outlet and used in scenarios requiring refrigeration.

[0043] S5. The low-pressure ammonia vapor generated in the evaporator 9 enters the absorber 12 through the low-pressure ammonia vapor pipe 11 and is evenly dispersed through multiple outlets 21 at the pipe end. At the same time, the first pump body 118 is started to pressurize the dilute solution flowing out of the vaporization box 102 and spray it out through the dilute solution outlet pipe 117 through multiple nozzles 20 on the installation pipe 19, which fully contact the low-pressure ammonia vapor. The sprayed dilute solution accumulates at the lower end of the absorber 12 until it submerges the outlet 21. The low-pressure ammonia vapor sprayed from the outlet 21 then comes into further contact with the dilute solution. The high water content of the dilute solution absorbs the low-pressure ammonia vapor to form a concentrated ammonia solution. The heat released during the absorption process is carried away by the cooling water in the second cooling water pipe 15 delivered by the third pump body 14. The cooling water comes from the second cooling water tank 13 and is discharged after absorbing heat. The concentrated solution in the absorber 12 flows into the storage tank 17 through the concentrated solution pipe 16 and is then pumped back into the heating box 101 by the fourth pump body 18 to complete the cycle of the entire thermal refrigeration system and achieve continuous refrigeration.

Claims

1. A continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor, comprising a generator (1) and a condenser (2), characterized in that: The generator (1) includes a heating box (101) and a vaporization box (102). A heat source inlet (103) is provided at one end of the heating box (101), and a heat source outlet (104) is provided at the end of the heating box (101) away from the heat source inlet (103). A solution inlet pipe (105) is fixedly connected to the end of the heating box (101) near the heat source inlet (103). Multiple first branch pipes (106) and multiple second branch pipes (107) are fixedly connected to one end of the solution inlet pipe (105) via two branch pipes. Multiple first heat exchange plates (108) are fixedly connected to one side of the interior of the heating box (101). One of the multiple first heat exchange plates (108) near the solution inlet pipe (105) is fixedly connected to multiple first branch pipes (106). Multiple second heat exchange plates (107) are fixedly connected to the side of the interior of the heating box (101) away from the first heat exchange plate (108). 9) One of the multiple second heat exchange plates (109) near the solution inlet pipe (105) is fixedly connected to multiple second branch pipes (107). Two adjacent first heat exchange plates (108) and two adjacent second heat exchange plates (109) are connected by multiple connecting pipes (110). The heating box (101) is fixedly connected to a solution outlet pipe (113) at one end near the heat source outlet (104). One of the multiple first heat exchange plates (108) near the solution outlet pipe (113) is fixedly connected to multiple first manifolds (111) at one end. One of the multiple second heat exchange plates (109) near the solution outlet pipe (113) is fixedly connected to multiple second manifolds (112) at one end. The multiple first manifolds (111) and the multiple second manifolds (112) are fixedly connected to the solution outlet pipe (113).

2. The continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor according to claim 1, characterized in that: The solution outlet pipe (113) is fixedly connected to the vaporization box (102). A pressure gauge (114) is installed in the middle of the solution outlet pipe (113). Multiple guide plates (116) are fixedly connected inside the vaporization box (102). A high-temperature ammonia vapor pipe (115) is fixedly installed at the upper end of the vaporization box (102). A dilute solution outlet pipe (117) is fixedly installed at the lower end of the vaporization box (102).

3. A continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor according to claim 2, characterized in that: The condenser (2) is equipped with a condenser tube (3). One end of the high-temperature ammonia vapor tube (115) extends into the condenser (2) and is fixedly connected to the condenser tube (3). One end of the condenser tube (3) is fixedly connected to a connecting pipe (4). A throttle valve (5) is fixedly installed in the middle of the connecting pipe (4). Two first cooling water pipes (7) are fixedly connected inside the condenser (2). One of the two first cooling water pipes (7) near the high-temperature ammonia vapor tube (115) is fixedly connected to a first cooling water tank (6) and a second pump body (8) is fixedly installed in the middle.

4. A continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor according to claim 3, characterized in that: The end of the connecting pipe (4) away from the condenser (2) is fixedly connected to the evaporator (9), and the end of the evaporator (9) away from the connecting pipe (4) is fixedly connected to the low-pressure ammonia vapor pipe (11). The refrigerant pipe (10) is fixedly connected inside the evaporator (9), and the inlet and outlet of the refrigerant pipe (10) are both outside the evaporator (9).

5. A continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor according to claim 4, characterized in that: The low-pressure ammonia vapor pipe (11) is fixedly connected to an absorber (12) at one end away from the evaporator (9). Multiple gas outlets (21) are fixedly connected to the surface of the end of the low-pressure ammonia vapor pipe (11) that extends into the absorber (12). One end of the dilute solution outlet pipe (117) is fixedly connected to the absorber (12) and a first pump body (118) is fixedly installed in the middle. An installation pipe (19) is fixedly connected to the end of the dilute solution outlet pipe (117) that extends into the absorber (12). Multiple nozzles (20) are fixedly connected to the surface of the installation pipe (19).

6. A continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor according to claim 5, characterized in that: The absorber (12) is fixedly connected to a second cooling water pipe (15), one end of which is fixedly connected to a second cooling water tank (13) and a third pump body (14) is fixedly installed in the middle. The absorber (12) is fixedly connected to a concentrated solution pipe (16).

7. A continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor according to claim 6, characterized in that: The end of the concentrated solution pipe (16) away from the absorber (12) is fixedly connected to a storage tank (17), the lower end of the storage tank (17) is fixedly connected to the solution inlet pipe (105), and a fourth pump body (18) is fixedly installed in the middle of the solution inlet pipe (105).

8. A method for a continuous thermal cooling system utilizing the thermal energy of an oil-injected screw air compressor according to any one of claims 1-7, comprising the following steps: S1. Add a high-concentration ammonia solution to the storage tank (17). When in use, first start the fourth pump (18). The concentrated ammonia solution in the storage tank (17) is driven by the fourth pump (18) and enters the heating box (101) through the solution inlet pipe (105). It is then distributed to multiple first heat exchange plates (108) and second heat exchange plates (109) in the heating box through the first split pipe (106) and the second split pipe (107). The high-temperature waste heat of the oil-injected screw air compressor is connected to the heat source inlet (103) and enters the heating box (101) to exchange with the first heat exchange plate. The concentrated solution in the first heat exchanger (108) and the second heat exchanger (109) exchange heat. The low-temperature heat source after heat exchange is discharged from the heat source outlet (104). The concentrated solution absorbs heat in the first heat exchanger (108) and the second heat exchanger (109) and its temperature rises. It flows sequentially through the connecting pipe (110) between adjacent first heat exchanger (108) and second heat exchanger (109) and finally converges into the solution outlet pipe (113) through the first manifold (111) and the second manifold (112). The pressure gauge (114) can monitor the pressure of the solution after heating in real time. S2. The heated solution enters the vaporization tank (102) through the solution outlet pipe (113). Under the guidance of multiple guide plates (116) in the vaporization tank (102), the solution flow rate slows down and makes full contact with the space. The ammonia in it evaporates into high temperature and high pressure ammonia vapor due to heat absorption. The high temperature ammonia vapor is discharged from the high temperature ammonia vapor pipe (115) at the top of the vaporization tank (102) and enters the condenser (2). The remaining low ammonia content dilute solution flows from the dilute solution outlet pipe (117) at the bottom of the vaporization tank to the absorber (12). S3. High-temperature ammonia vapor enters the condenser tube (3) of the condenser (2) through the high-temperature ammonia vapor pipe (115). At the same time, the second pump body (8) delivers the cooling water in the first cooling water tank (6) to the first cooling water pipe (7) in the condenser. The cooling water exchanges heat with the ammonia vapor in the condenser tube (3), and the ammonia vapor condenses into high-pressure liquid ammonia. S4. The condensed high-pressure liquid ammonia is transported to the throttle valve (5) through the connecting pipe (4). The pressure is reduced by the throttling effect, and the temperature is reduced significantly, forming a low-pressure and low-temperature gas-liquid mixture of ammonia. The low-pressure and low-temperature gas-liquid mixture of ammonia will enter the evaporator (9) through the connecting pipe (4) and evaporate inside the evaporator (9). It will be completely evaporated into low-pressure ammonia vapor, and at the same time absorb the heat of the refrigerant in the refrigerant pipe (10) in the evaporator (9). The cooled refrigerant is discharged from the refrigerant pipe outlet and used in scenarios that require refrigeration. S5. The low-pressure ammonia vapor generated in the evaporator (9) will enter the absorber (12) through the low-pressure ammonia vapor pipe (11), and be evenly dispersed through multiple outlets (21) at the pipe end. At the same time, the first pump body (118) is started to pressurize the dilute solution flowing out of the vaporization box (102) and spray it out through the dilute solution outlet pipe (117) through multiple nozzles (20) on the installation pipe (19), which fully contact the low-pressure ammonia vapor. At the same time, the sprayed dilute solution will accumulate at the lower end of the absorber (12) until it submerges the outlet (21) and the second outlet (20). 1) The low-pressure ammonia vapor ejected from the absorber will come into further contact with the dilute solution. The dilute solution absorbs the low-pressure ammonia vapor to form a concentrated ammonia solution. The heat released during the absorption process is carried away by the cooling water in the second cooling water pipe (15) delivered by the third pump body (14). The cooling water comes from the second cooling water tank (13). After absorbing heat, it is discharged. The concentrated solution in the absorber (12) flows into the storage tank (17) through the concentrated solution pipe (16) for storage. Then, it is pumped back into the heating box (101) by the fourth pump body (18) to complete the cycle of the entire thermal cooling system and achieve continuous cooling.

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