Cloth freezing dryer

Abstract

The utility model provides a cloth freezing dryer which comprises a freezing drying box, two sides of the freezing drying box are respectively provided with a cloth inlet and a cloth outlet which are distributed up and down, two cloth inlet rollers which are arranged oppositely are rotatably connected to the cloth inlet in the freezing drying box, and two cloth outlet rollers which are arranged oppositely are rotatably connected to the cloth outlet in the freezing drying box. A plurality of cloth guide rollers are rotationally connected into the cold drying box; an air inlet cover and an air outlet cover are arranged on the two sides of the cold drying box respectively, an air inlet hole communicated with the air inlet cover is formed in the side wall of the cold drying box, an air outlet hole communicated with the air outlet cover is formed in the side wall of the cold drying box, a condensation barrel is arranged at the upper end of the cold drying box, an air inlet is formed in the upper portion of the condensation barrel, and the middle of the condensation barrel is communicated with the air inlet cover through a flow limiting pipe. A refrigerator for cooling the condensation cylinder is installed on the upper portion of the cold drying box, a negative pressure pump is installed at the upper end of the cold drying box, and the inlet end of the negative pressure pump is communicated with the air outlet cover. On the basis of fabric cold drying, negative pressure auxiliary drying is added, and the drying rate can be further improved.

Description

Technical Field

[0001] This utility model belongs to the field of textile processing technology and relates to a fabric cold dryer. Background Technology

[0002] In the textile industry, fabric drying is a crucial step in the production process. Traditionally, hot air drying is one of the most common methods, removing moisture by evaporating it through heated air flowing over the surface of damp fabric. However, this method has some significant drawbacks, especially for temperature-sensitive materials. High temperatures can damage fabric fibers, affecting the texture and appearance of the final product, and may even lead to color changes or dimensional instability issues.

[0003] To address these issues, the industry has begun exploring gentler and more effective drying technologies. Against this backdrop, fabric coolers have gradually attracted attention as a new type of drying equipment. Unlike traditional hot air drying, fabric coolers use a lower temperature environment for moisture removal, aiming to reduce the risk of fabric damage caused by high temperatures. These machines typically utilize dehumidification technology to effectively reduce the moisture content of the fabric while maintaining a low temperature, thereby achieving the drying purpose.

[0004] While fabric dryers excel at protecting fabric quality, their efficiency is somewhat limited. Because the drying temperature is relatively low, the rate of moisture evaporation is slow, directly impacting the overall drying rate and extending the overall production cycle. Utility Model Content

[0005] The purpose of this invention is to provide a fabric cold dryer that, based on the fabric cold drying process, adds negative pressure-assisted drying, which can further improve the drying rate and shorten the cycle.

[0006] To solve the above-mentioned technical problems, this utility model provides a fabric cold dryer, including a cold drying box. A fabric inlet is provided at the upper part of one side of the cold drying box, and a fabric outlet is provided at the lower part of the side of the cold drying box away from the fabric inlet. Two opposing fabric inlet rollers are rotatably connected inside the cold drying box at the fabric inlet. A fabric inlet drive motor is installed outside the cold drying box, and the power output shaft of the fabric inlet drive motor is connected to one end of one of the fabric inlet rollers. Two opposing fabric outlet rollers are rotatably connected inside the cold drying box at the fabric outlet. A fabric outlet drive motor is installed outside the cold drying box, and the power output shaft of the fabric outlet drive motor is connected to one end of one of the fabric outlet rollers. Multiple guide rollers are rotatably connected inside the cold drying box, and multiple guide rollers are vertically arranged near both the fabric inlet and the fabric outlet.

[0007] The refrigerated drying box has an air inlet hood and an air outlet hood on both sides perpendicular to the inlet. An air inlet hole communicating with the air inlet hood is opened on the side wall of the refrigerated drying box, and an air inlet pipe is connected to the air inlet hood outwards. An air outlet hole communicating with the air outlet hood is opened on the side wall of the refrigerated drying box, and an air outlet pipe is connected to the air outlet hood outwards. A condenser cylinder is installed at the upper end of the refrigerated drying box, and an air inlet is opened at the upper part of the condenser cylinder. The middle part of the condenser cylinder is connected to the air inlet pipe through a flow-limiting pipe, the inner diameter of which is smaller than the inner diameter of the air inlet pipe. A cooler for cooling the condenser cylinder is installed at the upper part of the refrigerated drying box. A negative pressure pump is installed at the upper end of the refrigerated drying box, and the inlet end of the negative pressure pump is connected to the air outlet pipe.

[0008] By adopting the above technical solution, the fabric passes through two feed rollers, then meanders around each guide roller in a serpentine pattern, finally exiting between two output rollers. The feed and output rollers provide the traction force for the fabric to move forward. During the process, a negative pressure pump draws air, creating a negative pressure inside the cold drying chamber. Under the action of the flow-limiting pipe, the generated negative pressure allows air to slowly enter the cold drying chamber. Under the action of negative pressure, the air enters the condenser cylinder, where the refrigeration unit lowers the temperature inside the condenser cylinder, absorbing heat from the air. Furthermore, the water vapor in the air condenses on the inner wall of the condenser cylinder, turning the air into dry, cold air that enters the cold drying chamber to absorb moisture from the fabric. The negative pressure inside the cold drying chamber also makes it easier for the moisture on the fabric to dissipate. At the same time, the air passes quickly over the fabric surface, which can more quickly remove the moisture from the fabric, thus achieving rapid cold drying of the fabric. Meanwhile, the condensed water continuously accumulates at the bottom of the condenser cylinder, requiring the valve to be opened periodically to drain the water from the condenser cylinder through the drain pipe.

[0009] The present invention is further configured such that multiple air inlets are arranged side by side from bottom to top on one side of the refrigerated drying box, and multiple air outlets are arranged side by side from bottom to top on one side of the refrigerated drying box.

[0010] The present invention is further configured such that a drain pipe is connected to the lower part of the condenser cylinder, and a valve is provided on the drain pipe.

[0011] The present invention is further configured such that the refrigeration unit includes a spiral evaporator, a condenser, a compressor and an expansion valve, the compressor is connected between one end of the spiral evaporator and one end of the condenser, the expansion valve is connected between the other end of the spiral evaporator and the other end of the condenser, and an inner cylinder is provided inside the condensing cylinder, and the spiral evaporator is spirally wound around the outer wall of the inner cylinder inside the condensing cylinder.

[0012] The present invention is further provided that a spiral guide vane, which cooperates with the spiral evaporator, is provided between the inner wall of the condenser and the outer wall of the inner cylinder.

[0013] The present invention is further configured such that the cold drying box has doors on one side of the fabric inlet and one side of the fabric outlet, and each door is hinged with a sealing door.

[0014] The present invention is further provided that each doorway edge is provided with a sealing strip that matches the corresponding sealing door.

[0015] Compared with existing technologies, this invention adds a negative pressure-assisted drying process to the existing cold drying process. The air in the cold drying chamber is discharged by a negative pressure pump. Under the action of negative pressure, the air is cooled and dehumidified by the condenser before entering the cold drying chamber to absorb the moisture of the fabric. However, due to the effect of the flow restrictor, the resistance of the air entering the cold drying chamber is increased, which creates a negative pressure in the cold drying chamber. The moisture in the fabric is more easily lost under the action of negative pressure. At the same time, the negative pressure causes the incoming air to form a high-speed airflow, which can more quickly remove the moisture from the fabric, thereby achieving rapid cold drying of the fabric. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure used to show the other side of the structure of this utility model;

[0018] Figure 3 This is a cross-sectional view used to show the internal structure of a refrigerated drying box;

[0019] Figure 4 It is a partial sectional view used to show the internal structure of the condenser and the refrigerator.

[0020] The components include: 1. Refrigerated drying box; 2. Fabric inlet; 3. Fabric outlet; 4. Sealing door; 5. Sealing strip; 6. Fabric inlet roller; 7. Fabric inlet drive motor; 8. Fabric outlet roller; 9. Fabric outlet drive motor; 10. Fabric guide roller; 11. Air inlet hood; 12. Air outlet hood; 13. Air inlet hole; 14. Air inlet pipe; 15. Air outlet hole; 16. Air outlet pipe; 17. Condenser; 18. Inner cylinder; 19. Spiral guide vane; 20. Air inlet; 21. Flow restriction pipe; 22. Drain pipe; 23. Valve; 24. Spiral evaporator; 25. Condenser; 26. Compressor; 27. Expansion valve; 28. Negative pressure pump. Detailed Implementation

[0021] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the fabric refrigeration dryer proposed in this utility model. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model. The same or similar reference numerals in the drawings represent the same or similar parts.

[0022] Example, refer to Figure 1-4 A fabric cold dryer includes a cold drying chamber 1. A fabric inlet 2 is located on the upper part of one side of the cold drying chamber 1, and a fabric outlet 3 is located on the lower part of the side of the cold drying chamber 1 away from the fabric inlet 2. A door is located on one side of the cold drying chamber 1 at the fabric inlet 2 and on one side of the fabric outlet 3. Each door is hinged to a sealing door 4, and a sealing strip 5 is provided around the edge of each door to cooperate with the corresponding sealing door 4. The sealing door 4 facilitates the adjustment and placement of fabric into the cold drying chamber 1. Two opposing fabric feed rollers 6 are rotatably connected to the fabric inlet 2 inside the cold drying chamber 1. A fabric feed drive motor 7 is installed outside the cold drying chamber 1, and the power output shaft of the fabric feed drive motor 7 is connected to one end of one of the fabric feed rollers 6. Two opposing fabric output rollers 8 are rotatably connected to the fabric outlet 3 inside the cold drying chamber 1. A fabric output drive motor 9 is installed outside the cold drying chamber 1, and the power output shaft of the fabric output motor 9 is connected to one end of one of the fabric output rollers 8. Multiple guide rollers 10 are rotatably connected inside the cold drying box 1. Multiple guide rollers 10 are vertically arranged near the inlet 2 and near the outlet 3.

[0023] The refrigerated drying chamber 1 has an air inlet hood 11 and an air outlet hood 12 on each side of its vertical inlet 2. Multiple air inlet holes 13, distributed from bottom to top and connected to the air inlet hood 11, are provided on the side wall of the refrigerated drying chamber 1. These multiple air inlet holes 13 allow cold air to enter the refrigerated drying chamber 1 evenly. An air inlet pipe 14 is connected outward from the air inlet hood 11. Similarly, multiple air outlet holes 15, distributed from bottom to top and connected to the air outlet hood 12, are provided on the side wall of the refrigerated drying chamber 1. These multiple air outlet holes 15 allow air inside the refrigerated drying chamber 1 to be drawn out evenly. An air outlet pipe 16 is connected outward from the air outlet hood 12.

[0024] A condenser cylinder 17 is installed at the upper end of the refrigerated drying chamber 1. An inner cylinder 18 is installed inside the condenser cylinder 17. A spiral guide vane 19 is installed between the inner wall of the condenser cylinder 17 and the outer wall of the inner cylinder 18. An air inlet 20 is opened at the upper part of the condenser cylinder 17. The middle part of the condenser cylinder 17 is connected to the air inlet pipe 14 through a flow-limiting pipe 21. The inner diameter of the flow-limiting pipe 21 is smaller than the inner diameter of the air inlet pipe 14 to increase the air inlet resistance and facilitate the formation of negative pressure inside the refrigerated drying chamber 1. A drain pipe 22 is connected to the lower part of the condenser cylinder 17. A valve 23 is installed on the drain pipe 22.

[0025] A refrigeration unit for cooling the condenser cylinder 17 is installed at the top of the refrigerated drying chamber 1. The refrigeration unit includes a spiral evaporator 24, a condenser 25, a compressor 26, and an expansion valve 27. The compressor 26 is connected between one end of the spiral evaporator 24 and one end of the condenser 25, and the expansion valve 27 is connected between the other end of the spiral evaporator 24 and the other end of the condenser 25. The spiral evaporator 24 is spirally wound around the outer wall of the inner cylinder 18 in cooperation with the spiral guide vanes 19 inside the condenser cylinder 17. A negative pressure pump 28 is installed at the top of the refrigerated drying chamber 1. The inlet end of the negative pressure pump 28 is connected to the air outlet pipe 16, and through the setting of the flow restriction pipe 21, the air pumping speed of the negative pressure pump 28 is greater than the air intake speed of the air inlet pipe 14, thereby creating a negative pressure inside the refrigerated drying chamber 1.

[0026] Working principle: After passing through two feed rollers 6, the fabric serpentinely wraps around each guide roller 10 and finally exits between two output rollers 8. The feed rollers 6 and output rollers 8 provide the traction force for the fabric to move forward. During the process, the negative pressure pump 28 draws air, creating a negative pressure inside the cold drying chamber 1. Under the action of the flow limiting pipe 21, the generated negative pressure causes air to slowly enter the cold drying chamber 1. Under the action of negative pressure, the air enters the condenser cylinder 17, and the refrigeration unit works, causing the spiral evaporator 24 to absorb heat from the air. The water vapor in the air condenses on the surface of the spiral evaporator 24 and the spiral guide blades 19, turning the air into dry, cold air that enters the cold drying chamber 1 to absorb moisture from the fabric. The negative pressure inside the cold drying chamber 1 makes it easier for the moisture on the fabric to dissipate. At the same time, the air passes quickly through the fabric surface, which can more quickly remove the moisture from the fabric, thereby achieving rapid cold drying of the fabric. Meanwhile, the condensed water continuously accumulates at the bottom of the condenser cylinder 17. The valve 23 needs to be opened periodically to drain the water from the condenser cylinder 17 through the drain pipe 22.

[0027] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0028] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A fabric refrigerated dryer, comprising a refrigerated drying chamber (1), characterized in that, The cold drying box (1) has a fabric inlet (2) on the upper part of one side and a fabric outlet (3) on the lower part of the side away from the fabric inlet (2). Two opposing fabric feed rollers (6) are rotatably connected inside the cold drying box (1) at the fabric inlet (2). A fabric feed drive motor (7) is installed outside the cold drying box (1). The power output shaft of the fabric feed drive motor (7) is connected to one end of one of the fabric feed rollers (6). (1) Two oppositely arranged fabric discharge rollers (8) are rotatably connected inside the fabric discharge port (3). A fabric discharge drive motor (9) is installed outside the cold drying box (1). The power output shaft of the fabric discharge drive motor (9) is connected to one end of one of the fabric discharge rollers (8). Multiple guide rollers (10) are rotatably connected inside the cold drying box (1). Multiple guide rollers (10) are vertically arranged near the fabric inlet (2) and near the fabric outlet (3). The refrigerated drying box (1) is provided with an air inlet hood (11) and an air outlet hood (12) on both sides perpendicular to the inlet (2). An air inlet hole (13) communicating with the air inlet hood (11) is provided on the side wall of the refrigerated drying box (1). An air inlet pipe (14) is connected to the air inlet hood (11) outwards. An air outlet hole (15) communicating with the air outlet hood (12) is provided on the side wall of the refrigerated drying box (1). An air outlet pipe (16) is connected to the air outlet hood (12) outwards. The upper end of the refrigerated drying box (1) is provided with… A condenser (17) is provided with an air inlet (20) at its upper part. The middle part of the condenser (17) is connected to the air inlet pipe (14) through a flow limiting pipe (21). The inner diameter of the flow limiting pipe (21) is smaller than the inner diameter of the air inlet pipe (14). A cooler for cooling the condenser (17) is installed at the upper part of the refrigerated drying box (1). A negative pressure pump (28) is installed at the upper end of the refrigerated drying box (1). The inlet end of the negative pressure pump (28) is connected to the air outlet pipe (16).

2. The fabric refrigerated dryer according to claim 1, characterized in that, Multiple air inlets (13) are arranged side by side from bottom to top on one side of the refrigerated drying box (1), and multiple air outlets (15) are arranged side by side from bottom to top on one side of the refrigerated drying box (1).

3. A fabric refrigerated dryer according to claim 1, characterized in that, The lower part of the condenser (17) is connected to a drain pipe (22), and a valve (23) is provided on the drain pipe (22).

4. A fabric refrigerated dryer according to claim 1, characterized in that, The refrigerator includes a spiral evaporator (24), a condenser (25), a compressor (26), and an expansion valve (27). The compressor (26) is connected between one end of the spiral evaporator (24) and one end of the condenser (25). The expansion valve (27) is connected between the other end of the spiral evaporator (24) and the other end of the condenser (25). An inner cylinder (18) is provided inside the condenser cylinder (17). The spiral evaporator (24) is spirally wound around the outer wall of the inner cylinder (18) inside the condenser cylinder (17).

5. A fabric refrigerated dryer according to claim 4, characterized in that, A spiral guide vane (19) that cooperates with the spiral evaporator (24) is provided between the inner wall of the condenser (17) and the outer wall of the inner cylinder (18).

6. A fabric refrigerated dryer according to claim 1, characterized in that, The cold drying box (1) has doors on one side of the inlet (2) and one side of the outlet (3), and each door is hinged with a sealing door (4).

7. A fabric refrigerated dryer according to claim 6, characterized in that, Each doorway edge is equipped with a sealing strip (5) that matches the corresponding sealing door (4).

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