Freezing dryer with cold water recycling function

Abstract

The utility model discloses a freezing dryer with a cold water recycling function, which comprises an air system, a refrigerating system and an air-water separator, and the air system comprises a precooler and an evaporator which are communicated in sequence according to the air flowing direction. The refrigerating system comprises a compressor, a condenser, a drying filter, a capillary tube and an evaporator which are sequentially communicated in the flowing direction of refrigerants, a cooling flow channel is formed in the evaporator, a compressed air inlet and a compressed air outlet which are communicated with the cooling flow channel are formed in the precooler, and the air-water separator is communicated with the cooling flow channel and the precooler. A cold water collecting opening is formed in the bottom of the gas-water separator, an electric drainage valve is connected to the cold water collecting opening, the other end of the electric drainage valve is connected with a Venturi tube, the inlet end of the Venturi tube is communicated with one end of the electric drainage valve, and the diffusion end of the Venturi tube is communicated with the input end of an injection pump. And the output end of the injection pump is connected with a spray header positioned above the condenser. According to the structure, low-temperature condensed water in compressed air is fully recycled.

Description

Technical Field

[0001] This utility model relates to the technical field of refrigerated dryers, specifically a refrigerated dryer with cold water recycling function. Background Technology

[0002] Refrigerated air dryers, short for freeze dryers, primarily utilize refrigerant to exchange heat with compressed air, lowering the compressed air temperature to a dew point temperature ranging from 2 to 10°C. With the continuous development of the refrigerated air dryer industry, more and more companies are entering the air compressor sector, and the refrigerated air dryer industry is gaining popularity, leading to the emergence of many outstanding companies.

[0003] The existing refrigeration system of a refrigeration dryer mainly includes components such as an evaporator, compressor, condenser, dryer filter, capillary tube, precooler, and gas-liquid separator. The working principle is as follows: After the refrigerant absorbs heat from the compressed air in the evaporator, it vaporizes into a low-temperature, low-pressure gaseous refrigerant, which is then drawn into the refrigeration compressor and compressed into a high-temperature, high-pressure gaseous refrigerant before being discharged into the condenser. In the condenser, it releases heat and condenses into a high-pressure liquid. After passing through the dryer filter to remove moisture and impurities, it is throttled by the capillary tube into a low-pressure, low-temperature refrigerant, which re-enters the evaporator to absorb heat and vaporize, achieving the purpose of cyclic refrigeration. At the same time, a cooling channel is formed inside the evaporator. The precooler is equipped with a compressed air inlet and a compressed air outlet that are connected to the cooling channel. The gas-liquid separator is connected to the cooling channel and the precooler. The gas-liquid separator separates the water, oil, and impurities condensed from the gas, and the water is discharged outside the machine through a drain.

[0004] The drawback of using the above-mentioned refrigeration system is that the low-temperature water (2-10 degrees Celsius) periodically generated by the air-water separator in the refrigerated dryer and the water condensed on the outer wall of the compressor are directly discharged outside the machine, resulting in a waste of cooling capacity. Utility Model Content

[0005] The purpose of this invention is to provide a refrigerated dryer with cold water recycling to solve the problem mentioned in the background art that the water separated by the air-water separator in existing refrigerated dryers is directly discharged outside the machine, resulting in a waste of cooling capacity.

[0006] To achieve the above objectives, this utility model provides a refrigerated dryer with cold water recycling, comprising an air system, a refrigeration system, and a gas-water separator. The air system includes a precooler and an evaporator connected in sequence according to the air flow direction. The refrigeration system includes a compressor, a condenser, a dryer filter, a capillary tube, and an evaporator connected in sequence according to the refrigerant flow direction. A cooling channel is formed inside the evaporator. The precooler is provided with a compressed air inlet and a compressed air outlet connected to the cooling channel. The gas-water separator is connected to the cooling channel and the precooler. A cold water collection port is provided at the bottom of the gas-water separator. An electric drain valve is connected to the cold water collection port. The other end of the electric drain valve is connected to a Venturi tube. The inlet end of the Venturi tube is connected to one end of the electric drain valve. The diffuser end of the Venturi tube is connected to the input end of a jet pump. The output end of the jet pump is connected to a spray head located above the condenser.

[0007] In order to further collect the low-temperature water generated by the compressor and further realize resource reuse, a return pipe is connected to the throat of the venturi tube, and a water tray is provided at the bottom of the compressor, with the bottom of the water tray connected to the other end of the return pipe.

[0008] To improve the cooling effect of the condenser, the output end of the jet pump is connected to a main jet pipe, and one or more spray branch pipes are arranged at intervals on the main jet pipe, with a spray head installed in each spray branch pipe.

[0009] To enable automatic pressure detection, a pressure gauge is also connected to the connecting pipe between the dryer filter and the capillary tube.

[0010] To allow water to quickly enter the return pipe, the water tray has an inclined structure, and the return pipe is fixed to the bottom of the lower end of the water tray.

[0011] To prevent water from leaking out from the side, a baffle plate is provided on the water tray above the lower end of the tray.

[0012] To facilitate adjustment of the tilt angle of the water tray, a fixed support is also included. One end of the bottom of the water tray is hinged to the fixed support via a pivot. Two positioning seats are provided on the side of the fixed support. A lead screw is rotatably connected to the positioning seats. A handwheel is provided above the lead screw. A lead screw sleeve is threaded onto the lead screw. The end of the lead screw sleeve away from the lead screw is hinged to the side of the water tray.

[0013] Preferably, in order to achieve timed drainage, a timer switch is provided on the side of the electric drain valve.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This structure enables the recycling and reuse of the gas-water separator. It uses a jet pump and multiple spray heads to atomize and spray water into the condenser. The fan inside the condenser sprays water into the condenser for further cooling. Compared with the existing gas-water separators that directly discharge the low-temperature water into the atmosphere, this structure further improves the reuse of low-temperature water and avoids the problem of wasting cooling capacity.

[0016] 2. At the same time, the water condensed on the outer wall of the compressor is further collected by using the return pipe, water tray and venturi tube. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a refrigerated dryer with cold water recycling in Embodiment 1.

[0018] Figure 2 This is a schematic diagram showing the connection between the Chinese-made Tube, air-water separator, jet pump, spray head, and water collection tray in Embodiment 1.

[0019] Figure 3 This is a schematic diagram of a refrigerated dryer with cold water recycling in Embodiment 2.

[0020] Figure 4 This is a schematic diagram of the water tray structure in Embodiment 2.

[0021] Figure 5 This is a schematic diagram showing the connection between the Chinese-made Tube, air-water separator, jet pump, spray head, and water collection tray in Embodiment 3.

[0022] In the diagram: 1. Precooler; 2. Evaporator; 3. Compressor; 4. Condenser; 5. Dryer filter; 6. Capillary tube; 7. Compressed gas inlet; 8. Compressed gas outlet; 9. Gas-water separator; 10. Cold water collection port; 11. Electric drain valve; 11. Timer switch; 12. Venturi tube; 12. Inlet end; 12. Diffuser end; 12. Jet pump; 13. Spray head; 14. Throat; 12. Return pipe; 15. Water tray; 16. Main spray pipe; 17. Spray branch pipe; 18. Water baffle; 19. Fixed support; 20. Rotary shaft; 21. Screw sleeve; 22. Positioning seat; 23. Screw; 24. Handwheel; 25. Pressure gauge; 26. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Example 1

[0026] Please see Figure 1 , Figure 2 This embodiment discloses a refrigerated dryer with cold water recycling, comprising an air system, a refrigeration system, and a gas-water separator 9. The air system includes a precooler 1 and an evaporator 2 connected sequentially in the direction of air flow. The refrigeration system includes a compressor 3, a condenser 4, a dryer filter 5, a capillary tube 6, and the evaporator 2 connected sequentially in the direction of refrigerant flow. A cooling channel is formed within the evaporator 2. The precooler 1 is provided with a compressed air inlet 7 and a compressed air outlet 8 connected to the cooling channel. The gas-water separator 9 is connected to the cooling channel and the precooler 1. The gas-water separator 9 is characterized by having a cold water collection port 10 at its bottom, and an electric exhaust fan connected to the cold water collection port 10. Water valve 11. To achieve timed drainage later, a timer switch 111 is provided on the side of the electric drain valve 11. The other end of the electric drain valve 11 is connected to a venturi tube 12. The inlet end 121 of the venturi tube 12 is connected to one end of the electric drain valve 11. The diffuser end 122 of the venturi tube 12 is connected to the input end of a jet pump 13. The output end of the jet pump 13 is connected to a spray head 14 located above the condenser 4. In order to improve the cooling effect of the condenser 4, the output end of the jet pump 13 is connected to a main spray pipe 17. One or more spray branch pipes 18 are arranged at intervals on the main spray pipe 17. Each spray branch pipe 18 is equipped with a spray head 14.

[0027] To further collect the low-temperature water generated by the compressor 3 during operation and further realize resource reuse, a return pipe 15 is connected to the throat 123 of the venturi tube 12. A water tray 16 is provided at the bottom of the compressor 3, and the lower part of the water tray 16 is connected to the other end of the return pipe 15. In this embodiment, since the compressor 3 also generates water during operation, in order to collect the water condensed on the outer wall surface of the compressor 3 during operation, a water tray 16 is placed at the outlet of the bottom of the compressor 3, and the water tray 16 is connected to the throat 123 of the venturi tube 12 through the return pipe 15. During operation, the water tray 16 is used to collect the condensate generated by the compressor. Since the liquid transport speed increases when the water flows from the large end 121 of the venturi tube 12 into the middle small end, the water in the water tray 16 can be pumped into the throat 123 of the venturi tube 12 through the return pipe 15 and simultaneously flow into the diffuser end 122.

[0028] In order to achieve automatic pressure detection, a pressure gauge 26 is also connected to the connecting pipe between the dryer filter 5 and the capillary tube 6. The addition of pressure gauge 26 enables automatic pressure detection of flow rate.

[0029] The working principle of this structure is as follows: The humid air generated by condensation is separated into air and water by the air-water separator 9. The low-temperature water (water temperature is very low, 5°C) generated by the air-water separator 9 enters the cold water collection port 10. After the electric drain valve 11 is opened, it enters the venturi tube 12. Then, it is atomized and sprayed into the condenser 4 by the jet pump 13 in conjunction with multiple spray heads 14. The fan in the condenser 4 sprays the water into the condenser 4 for further cooling. Compared with the existing air-water separator 9 which directly discharges the low-temperature water into the atmosphere, this structure further improves the reuse of low-temperature water and avoids the problem of wasting cooling capacity. At the same time, the return pipe 15 and the water tray 16 are used in conjunction with the venturi tube 12 to further collect the condensate generated by the compressor.

[0030] It should also be noted that the working principles of the precooler 1, evaporator 2, compressor 3, condenser 4, dryer filter 5, capillary tube 6, compressed gas inlet 7, compressed gas outlet 8, and gas-water separator 9, as well as the settings of other components of the refrigerated dryer, are all conventional technologies in this field, and therefore will not be described in detail.

[0031] Example 2

[0032] Please see Figure 3 , Figure 4 The general structure of the refrigerated dryer with cold water recycling disclosed in this embodiment is the same as that in embodiment 1. The difference is that, in order to allow water to quickly enter the return pipe 15, the water tray 16 adopts an inclined structure, and the return pipe 15 is fixed to the bottom of the lower end of the water tray 16.

[0033] To prevent water from leaking out from the side, a baffle plate 19 is provided on the water tray 16 above the lower end of the water tray 16. In this embodiment, by adding the baffle plate 19, water is prevented from flowing out from the side of the water tray 16 when the water tray 16 is tilted towards the return pipe 15.

[0034] In this structure, to allow the bottom of the water tray 16 to tilt appropriately towards the return pipe 15, further facilitating the subsequent rapid intake of water from the water tray 16 into the Venturi tube 12, the bottom of the water tray 16 is designed with one side thicker than the other. Figure 4 As shown, when the water tray 16 is laid flat, the bottom of the inner side of the water tray 16 is inclined, ensuring that the water from the bottom outlet of the compressor 3 will flow quickly to the lower end of the inner side of the water tray 16.

[0035] Example 3

[0036] Please see Figure 5 The general structure of the refrigerated dryer with cold water recycling disclosed in this embodiment is the same as that in Embodiment 1. The difference is that, in order to facilitate the adjustment of the tilt angle of the water tray, a fixed support 20 is also included. One end of the bottom of the water tray 16 is hinged to the fixed support 20 via a rotating shaft 21. Two positioning seats 23 are provided on the side of the fixed support 20. A lead screw 24 is rotatably connected to the positioning seat 23. A handwheel 25 is provided above the lead screw 24. A lead screw sleeve 22 is threaded onto the lead screw 24. The end of the lead screw sleeve 22 away from the lead screw 24 is hinged to the side of the water tray 16. In this embodiment... Since the final air system, refrigeration system, and air-water separator 9 all need to be installed inside the main casing of a refrigerated dryer, this structure is designed to facilitate adjustment so that the bottom of the water tray 16 is appropriately tilted towards the return pipe 15. When adjustment is needed, open the cabinet door of the main casing of the refrigerated dryer to expose the handwheel 25. By rotating the handwheel 25, the lead screw 24 is rotated, and the lead screw sleeve 22 moves up and down. This adjusts the water tray 16 located at the bottom outlet of the compressor 3 towards the return pipe 15, further facilitating the Venturi tube 12 to quickly draw water from the water tray 16 into the Venturi tube 12.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A refrigerated dryer with cold water recycling, comprising an air system, a refrigeration system, and a gas-water separator (9), wherein the air system comprises a precooler (1) and an evaporator (2) connected in sequence according to the direction of air flow, and the refrigeration system comprises a compressor (3), a condenser (4), a dryer filter (5), a capillary tube (6), and an evaporator (2) connected in sequence according to the direction of refrigerant flow, wherein a cooling channel is formed inside the evaporator (2), and the precooler (1) is provided with a compressed air inlet (7) and a compressed air outlet (8) connected to the cooling channel, and the gas-water separator (9) is connected to the cooling channel and to the precooler (1), characterized in that: The bottom of the gas-water separator (9) is provided with a cold water collection port (10), and an electric drain valve (11) is connected to the cold water collection port (10). The other end of the electric drain valve (11) is connected to a venturi tube (12). The inlet end (121) of the venturi tube (12) is connected to one end of the electric drain valve (11). The diffuser end (122) of the venturi tube (12) is connected to the input end of a jet pump (13). The output end of the jet pump (13) is connected to a spray head (14) located above the condenser (4).

2. A refrigerated dryer with cold water recycling according to claim 1, characterized in that: A return pipe (15) is connected to the throat (123) of the venturi tube (12), and a water tray (16) is provided at the bottom of the compressor (3). The lower part of the water tray (16) is connected to the other end of the return pipe (15).

3. A refrigerated dryer with cold water recycling according to claim 1, characterized in that: The output end of the jet pump (13) is connected to the jet main pipe (17), and one or more spray branch pipes (18) are arranged at intervals on the jet main pipe (17), and a spray head (14) is arranged in each spray branch pipe (18).

4. A refrigerated dryer with cold water recycling according to claim 1, characterized in that: A pressure gauge (26) is also connected to the connecting pipe between the dryer filter (5) and the capillary tube (6).

5. A refrigerated dryer with cold water recycling according to claim 2, characterized in that: The water tray (16) adopts an inclined structure, and the return pipe (15) is fixed on the bottom of the lower end of the water tray (16).

6. A refrigerated dryer with cold water recycling according to claim 5, characterized in that: A baffle plate (19) is provided on the water tray (16) above the lower end of the water tray (16).

7. A refrigerated dryer with cold water recycling according to claim 6, characterized in that: It also includes a fixed support (20), one end of the bottom of the water tray (16) is hinged to the fixed support (20) via a rotating shaft (21), two positioning seats (23) are provided on the side of the fixed support (20), a screw (24) is rotatably connected to the positioning seat (23), a handwheel (25) is provided above the screw (24), a screw sleeve (22) is threaded on the screw (24), and the end of the screw sleeve (22) away from the screw (24) is hinged to the side of the water tray (16).

8. A refrigerated dryer with cold water recycling according to claim 1, 2, or 3, characterized in that: A timer switch (111) is provided on the side of the electric drain valve (11).

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