A cold dryer system for nonwoven fabric production

Abstract

The utility model relates to the field of non - woven fabric production equipment, especially a cold - drying machine system for non - woven fabric production. The cold - drying machine system includes: refrigeration system and air circulation system, the refrigeration system includes: compressor, condenser, evaporimeter and liquid flow pipeline, the evaporimeter includes: fin assembly, air - blowing device and water spraying device, the water spraying device is used for spraying water on fin assembly. The refrigeration system in the cold - drying machine system combines two ways of air - cooling heat dissipation and spraying heat dissipation, compared with prior art, so that the cold - drying machine system can adjust the heat dissipation mode of refrigeration system in real time according to the change of outside air temperature, guarantees the refrigeration effect of the refrigeration system, and further makes the drying effect of the cold - drying machine system to air more stable, greatly improves the application value of the cold - drying machine system in the non - woven fabric production process.

Description

Technical Field

[0001] This utility model relates to the field of nonwoven fabric production equipment, and in particular to a refrigerated dryer system for nonwoven fabric production. Background Technology

[0002] During the production of nonwoven fabrics, it is necessary to dry the moisture in the air of the production environment. Dry compressed air can prevent moisture from affecting the fiber combing, web laying and bonding processes during the production of nonwoven fabrics, thereby ensuring the uniformity, strength and other physical properties of the nonwoven fabrics and improving the quality and consistency of the products.

[0003] Refrigerated air dryers are commonly used air-drying devices. Their main function is to dry compressed air, reducing its moisture content. Compressed air treated by a refrigerated air dryer has significantly reduced humidity, effectively preventing equipment corrosion, pipe blockage, and quality problems in non-woven fabric products such as dampness and mold caused by moisture in the air.

[0004] Air-cooled refrigerated air dryers are a common type of refrigerated air dryer. They use air as the cooling medium, forcing air through a blower to remove heat. Their advantages include the elimination of the need for a cooling water system and relatively simple installation and maintenance. However, their cooling effect is significantly affected by ambient temperature, and they may not achieve ideal drying results in high-temperature environments. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this invention is to propose a refrigerated drying system for nonwoven fabric production, which can adjust the spray cooling effect on the fin assembly according to changes in ambient temperature, thereby ensuring the working efficiency of the refrigerated drying system.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A refrigerated dryer system for nonwoven fabric production includes a refrigeration system and an air circulation system. The refrigeration system includes a compressor, a condenser, an evaporator, and a liquid flow pipe. The liquid outlet of the compressor is connected to the liquid inlet of the condenser via the liquid flow pipe. The liquid outlet of the condenser is connected to the liquid inlet of the evaporator via the liquid flow pipe. The liquid outlet of the evaporator is connected to the liquid inlet of the compressor via the liquid flow pipe. The evaporator includes a fin assembly, a blower, and a water sprayer. The fin assembly is used to dissipate heat from the evaporator to the outside. The blower is used to... Air is blown onto the fin assembly; the water spray device is used to spray water onto the fin assembly; refrigerant circulates within the refrigeration system; the air circulation system includes: an air compressor, a precooler, a condenser chamber, a gas-water separator, and an airflow duct; the evaporator is located within the condenser chamber; the air inlet of the air compressor is connected to an air source; the precooler transfers the heat of the gas flowing out of the air compressor's outlet to the gas flowing out of the condenser chamber's outlet; the outlet of the condenser chamber is equipped with a gas-water separator; the liquid outlet of the gas-water separator is used to collect and discharge the condensate from the evaporator.

[0008] Specifically, the fin assembly includes a vertically parallel liquid inlet chamber and a liquid outlet chamber, and multiple heat dissipation fins horizontally connected between the liquid inlet chamber and the liquid outlet chamber; a liquid flow channel is provided in the middle of the heat dissipation fins, and the liquid flow channel connects the liquid inlet chamber and the liquid outlet chamber; the air blowing device is arranged facing the air inlet side of the fin assembly; and the water spraying device is arranged at the top of the air inlet side of the fin assembly.

[0009] Specifically, the water spraying device includes a bracket, a water pump, a water supply pipe, a water tank, and several nozzles; the nozzles are installed at intervals on the bracket along the extension direction of the fins; the water supply pipe connects the inlets of several nozzles in parallel to the outlet of the water pump; the water pump is used to pump water from the water tank to the nozzles and spray it out.

[0010] More preferably, the water spray device is further equipped with a control system: a spray controller, a room temperature sensor, and a water temperature sensor; the room temperature sensor is installed indoors where the refrigeration system is located to monitor changes in indoor temperature; the water temperature sensor is installed in the water tank to monitor changes in the temperature of the water in the water tank; the spray controller is electrically connected to the room temperature sensor, the water temperature sensor, and the water pump.

[0011] More preferably, the water tank is equipped with a liquid level sensor, and the water inlet of the water tank is connected to an inlet pipe; the water inlet pipe of the water tank is connected to the municipal water supply system and the workshop air conditioning condensate pipe through an electromagnetic water valve, and the water tank is equipped with an overflow port; the liquid level sensor is electrically connected to the electromagnetic water valve.

[0012] More preferably, the side wall of the water tank is provided with a semiconductor cooling module, which is electrically connected to an external power supply and the spray controller.

[0013] More preferably, a water baffle is provided on the air outlet side of the fin assembly, and a water receiving trough is provided directly below the fin assembly and the water baffle, the water receiving trough being used to collect and store water that falls from the fin assembly.

[0014] More preferably, the drain port of the gas-liquid separator is connected to the water tank via a water pipe.

[0015] Specifically, the precooler includes an inlet chamber and an outlet chamber arranged in parallel; the outlet of the air compressor is connected to the inlet of the inlet chamber through the airflow pipe; the outlet of the inlet chamber is connected to the inlet of the condensing chamber through the airflow pipe; the outlet of the condensing chamber is connected to the inlet of the outlet chamber through the airflow pipe, and the gas flowing out of the outlet chamber is used by the nonwoven fabric production equipment; the airflow direction in the outlet chamber is opposite to the airflow direction in the inlet chamber.

[0016] Specifically, the evaporator is equipped with an expansion valve at the liquid inlet and a temperature controller, and the expansion valve is electrically connected to the temperature controller.

[0017] The beneficial effects of the embodiments of this utility model are as follows:

[0018] The refrigeration system in the aforementioned refrigerated air dryer combines air cooling and spray cooling. Compared to existing technologies, this allows the refrigerated air dryer to adjust its cooling method in real time according to changes in the outside temperature, ensuring the cooling effect of the refrigeration system. Consequently, the refrigerated air dryer's drying effect is more stable, greatly enhancing its application value in the nonwoven fabric production process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a portion of the control circuit in one embodiment of the present invention.

[0021] The components include: compressor 110, condenser 120, evaporator 130, fin assembly 140, air blowing device 140, water spraying device 150, bracket 151, water pump 152, water supply pipe 153, water tank 154, nozzle 155, air compressor 210, precooler 220, condenser chamber 230, and air-water separator 240. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] One embodiment of this application, such as Figures 1 to 2 As shown, a refrigerated dryer system for nonwoven fabric production includes a refrigeration system and an air circulation system. The refrigeration system includes a compressor 110, a condenser 120, an evaporator 130, and a liquid flow pipe. The liquid outlet of the compressor 110 is connected to the liquid inlet of the condenser 120 through the liquid flow pipe. The liquid outlet of the condenser 120 is connected to the liquid inlet of the evaporator 130 through the liquid flow pipe. The liquid outlet of the evaporator 130 is connected to the liquid inlet of the compressor 110 through the liquid flow pipe. The evaporator 130 includes a fin assembly 140, a blower 140, and a water spray device 150. The fin assembly 140 is used to dissipate heat from the evaporator 130 to the outside. The blower 140 is used to dissipate heat from the evaporator 130 to the outside. The system blows air onto the fin assembly 140; the water spray device 150 sprays water onto the fin assembly 140; the refrigeration system circulates refrigerant; the air circulation system includes: an air compressor 210, a precooler 220, a condenser chamber 230, a gas-water separator 240, and an airflow duct; the evaporator 130 is disposed within the condenser chamber 230; the air inlet of the air compressor 210 is connected to an air source, and the precooler 220 transfers the heat of the gas flowing out of the air compressor 210 to the gas flowing out of the condenser chamber 230; the condenser chamber 230 is equipped with a gas-water separator 240 at its outlet; the liquid outlet of the gas-water separator is used to collect and discharge the condensate in the evaporator 130.

[0024] Specifically, the water spraying device 150 includes a bracket 151, a water pump 152, a water supply pipe 153, a water tank 154, and a plurality of nozzles 155. The nozzles 155 are spaced apart on the bracket 151 along the extension direction of the fins. The water supply pipe 153 connects the inlets of the plurality of nozzles 155 in parallel to the outlet of the water pump 152. The water pump 152 is used to pump water from the water tank 154 to the nozzles 155 and then spray it out. Multiple nozzles 155 can spray the fin assembly 140 more comprehensively, improving the heat dissipation effect of the fin assembly 140. More preferably, the nozzles 155 can be atomizing nozzles 155.

[0025] More preferably, the water spray device 150 is further equipped with a control system: a spray controller, a room temperature sensor, and a water temperature sensor; the room temperature sensor is installed in the room where the refrigeration system is located to monitor changes in the room temperature; the water temperature sensor is installed in the water tank 154 to monitor changes in the water temperature in the water tank 154; the spray controller is electrically connected to the room temperature sensor, the water temperature sensor, and the water pump 152. The spray controller can adjust the operation of the water pump 152 in real time according to the changes in room temperature and the temperature of the water in the water tank 154, based on a preset parameter adjustment rule. This allows for real-time adjustment of the water spraying from the nozzle 155 onto the fins. The parameter adjustment rule mentioned here is a conventional rule that can be statistically summarized by those skilled in the art based on practical experience. The parameter adjustment rule can be flexibly adjusted for different regions and seasons, and is not a core technical point of this embodiment, so it will not be specifically described here. The general rule of this parameter adjustment rule is that when the room temperature rises and the temperature difference between the water tank 154 and the room temperature is not large enough, the pumping power of the water pump 152 will increase. When the room temperature drops and the temperature difference between the water tank 154 and the room temperature is large enough, the pumping power of the water pump 152 will decrease. This can compensate for the influence of room temperature on the cooling effect of the refrigeration system.

[0026] More preferably, the water tank 154 is equipped with a liquid level sensor, and the water inlet of the water tank 154 is connected to a water inlet pipe. The water inlet pipe of the water tank 154 is connected to the municipal water supply system and the condensate pipe of the workshop air conditioner through an electromagnetic water valve. The water tank 154 is equipped with an overflow port. The liquid level sensor is electrically connected to the electromagnetic water valve. The liquid level sensor can adjust the opening and closing of the water inlet valve in real time according to the liquid level in the water tank 154, thereby ensuring the liquid level in the water tank 154 as much as possible, making the operation of the water spray device 150 more stable. The water inlet pipe recovers the condensate from the workshop air conditioner, which saves water resources on the one hand, and the temperature of the air conditioner condensate is much lower than the room temperature, which helps to reduce the water temperature in the water tank 154, thereby improving the spray cooling effect on the fin assembly 140 while saving energy.

[0027] More preferably, a semiconductor cooling module is provided on the side wall of the water tank 154. The semiconductor cooling module is electrically connected to an external power supply and the spray controller. Under the control of the spray controller, the semiconductor cooling module can adjust the cooling mode in real time based on the room temperature and the temperature of the water in the water tank 154, further improving the spray cooling effect of the water spray device 150 on the fin assembly 140.

[0028] More preferably, a baffle plate is provided on the air outlet side of the fin assembly 140, and a water receiving trough is provided directly below the fin assembly 140 and the baffle plate. The water receiving trough is used to collect and store water that falls from the fin assembly 140. The water in the water receiving trough is water that has fallen from the fin assembly 140. The water temperature is too high to be directly recycled, so it can be temporarily stored in the water receiving trough. After it cools down overnight, it can be filtered and pumped into the water tank 154 for recycling, which can greatly reduce water waste.

[0029] Even better, the drain port of the gas-liquid separator 240 is connected to the water tank 154 via a water pipe. The water separated by the gas-liquid separator 240 in the evaporator 130 is also at a lower temperature. Filtering and recycling it into the water tank 154 can greatly reduce resource waste.

[0030] Specifically, the precooler 220 includes an inlet chamber and an outlet chamber arranged in parallel; the outlet of the air compressor 210 is connected to the inlet of the inlet chamber through the airflow pipe; the outlet of the inlet chamber is connected to the inlet of the condenser chamber 230 through the airflow pipe; the outlet of the condenser chamber 230 is connected to the inlet of the outlet chamber through the airflow pipe, and the gas flowing out of the outlet chamber is used by the nonwoven fabric production equipment; the airflow direction in the outlet chamber is opposite to the airflow direction in the inlet chamber. The precooler 220 is a commercially available product, specifically a plate heat exchanger, with a metal partition between the inlet and outlet chambers, which can exchange heat between the gases passing through the two chambers to a certain extent. It utilizes the low-temperature dry air exiting the evaporator 130 to exchange heat with the high-temperature humid air entering the air circulation system, thereby lowering the temperature of the air entering the evaporator 130 and simultaneously increasing the temperature of the dry air in the refrigerated dryer system, reducing cooling loss.

[0031] Specifically, the evaporator 130 is equipped with an expansion valve at its liquid inlet and a temperature controller, with the expansion valve electrically connected to the temperature controller. The temperature controller monitors and controls the temperature inside the evaporator 130, and controls the refrigerant flow rate by adjusting the opening of the expansion valve, thereby maintaining the temperature inside the evaporator 130 within a set range.

[0032] It should be noted that the compressor 110, condenser 120, evaporator 130, blower 140, air compressor 210, precooler 220, gas-water separator 240, water pump 152, water tank 154, nozzle 155, spray controller, room temperature sensor, water temperature sensor, liquid level sensor, electromagnetic water valve, semiconductor refrigeration module, and expansion valve mentioned above are all existing technologies. Products with corresponding functions can be directly purchased from the market according to functional requirements. The specific internal structure of these products is not the core technical point of this embodiment, and therefore does not need to be described in detail. The core technical point of this embodiment lies in how the functions of these products are applied in the refrigerated dryer system. The working principle of the refrigerated dryer system is as follows:

[0033] Compressor 110 compresses refrigerant (such as R22, R404A, etc.) into a high-temperature, high-pressure gas, which then enters condenser 120. In condenser 120, the refrigerant gas is cooled by airflow from blower 140 and sprayed with water from sprayer 150, transferring heat to the surrounding air and sprayed water, thus condensing into a high-pressure liquid. After being throttled and depressurized by expansion valve, the high-pressure liquid enters evaporator 130, absorbing heat through evaporation and lowering the surface temperature of evaporator 130. During evaporation, the refrigerant liquid in evaporator 130 absorbs heat from the surrounding environment, achieving a cooling effect. Moist compressed air enters the refrigerated dryer system through the inlet and first passes through precooler 220, exchanging heat with the low-temperature, dry air exiting evaporator 130, thus initially lowering the temperature of the compressed air. Then, the pre-cooled compressed air enters the condenser chamber 230. Passing through the evaporator 130, it exchanges heat with the low-temperature refrigerant (the evaporator 130, like the condenser 120, has many fins for heat transfer). The temperature of the compressed air further decreases below the dew point temperature, causing the water vapor to condense into water droplets. The condensed water droplets and impurities in the compressed air are separated in the air-water separator 240 and discharged from the refrigerated dryer through a drain. After drying and dehydration, the compressed air passes through the precooler 220, absorbs some heat, and is then discharged from the outlet. At this point, the compressed air is dry and low-temperature, meeting the requirements of air-using equipment in non-woven fabric production.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0036] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A refrigerated drying system for nonwoven fabric production, comprising: A refrigeration system and an air circulation system, characterized in that the refrigeration system comprises: a compressor, a condenser, an evaporator, and a liquid flow pipeline; The liquid outlet of the compressor is connected to the liquid inlet of the condenser through the liquid flow pipe; the liquid outlet of the condenser is connected to the liquid inlet of the evaporator through the liquid flow pipe; the liquid outlet of the evaporator is connected to the liquid inlet of the compressor through the liquid flow pipe. The evaporator includes: a fin assembly, a blower, and a water sprayer; the fin assembly is used to dissipate heat from the evaporator to the outside; the blower is used to blow air onto the fin assembly; and the water sprayer is used to spray water onto the fin assembly. The refrigeration system contains a circulating refrigerant. The air circulation system includes: an air compressor, a precooler, a condenser chamber, an air-water separator, and an airflow duct; the evaporator is disposed within the condenser chamber. The air compressor's inlet is connected to an air source, and the precooler transfers the heat of the gas flowing out of the air compressor's outlet to the gas flowing out of the condensing chamber's outlet; the condensing chamber's outlet is equipped with a gas-water separator; the gas-water separator's outlet is used to collect and discharge the condensate in the condensing chamber. The fin assembly includes a vertically parallel liquid inlet chamber and a liquid outlet chamber, and multiple heat dissipation fins horizontally connected between the liquid inlet chamber and the liquid outlet chamber; a liquid flow channel is provided in the middle of the heat dissipation fins, and the liquid flow channel connects the liquid inlet chamber and the liquid outlet chamber; a blower is provided facing the air inlet side of the fin assembly; a water spraying device is provided at the top of the air inlet side of the fin assembly; The water spraying device includes a bracket, a water pump, a water supply pipe, a water tank, and several nozzles; the nozzles are installed at intervals on the bracket along the extension direction of the fins; the water supply pipe connects the inlets of several nozzles in parallel to the outlet of the water pump; the water pump is used to pump water from the water tank to the nozzles and spray it out. The water spraying device is also equipped with a control system: a spray controller, a room temperature sensor, and a water temperature sensor; The room temperature sensor is installed indoors where the refrigeration system is located to monitor changes in indoor temperature; The water temperature sensor is installed inside the water tank to monitor the temperature changes of the water in the tank. The spray controller is electrically connected to the room temperature sensor, the water temperature sensor, and the water pump.

2. The refrigerated drying system for nonwoven fabric production according to claim 1, characterized in that, The water tank is equipped with a liquid level sensor, and the water inlet of the water tank is connected to an inlet pipe; the water inlet pipe of the water tank is connected to the municipal water supply system and the workshop air conditioning condensate pipe through an electromagnetic water valve, and the water tank is equipped with an overflow port; the liquid level sensor is electrically connected to the electromagnetic water valve.

3. The refrigerated drying system for nonwoven fabric production according to claim 1, characterized in that, The side wall of the water tank is equipped with a semiconductor cooling module, which is electrically connected to an external power supply and the spray controller.

4. The refrigerated drying system for nonwoven fabric production according to claim 2, characterized in that, A water baffle is provided on the air outlet side of the fin assembly, and a water receiving trough is provided directly below the fin assembly and the water baffle. The water receiving trough is used to collect and store water that falls from the fin assembly.

5. The refrigerated drying system for nonwoven fabric production according to claim 1, characterized in that, The drain port of the gas-liquid separator is connected to the water tank via a water pipe.

6. The refrigerated drying system for nonwoven fabric production according to claim 1, characterized in that, The precooler includes an inlet chamber and an outlet chamber arranged in parallel; the outlet of the air compressor is connected to the inlet of the inlet chamber through the airflow pipe; the outlet of the inlet chamber is connected to the inlet of the condensing chamber through the airflow pipe; the outlet of the condensing chamber is connected to the inlet of the outlet chamber through the airflow pipe, and the gas flowing out of the outlet chamber is used by the nonwoven fabric production equipment; the airflow direction in the outlet chamber is opposite to the airflow direction in the inlet chamber.

7. The refrigerated drying system for nonwoven fabric production according to claim 1, characterized in that, The evaporator is equipped with an expansion valve at its liquid inlet and a temperature controller, and the expansion valve is electrically connected to the temperature controller.

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