Air drying device with automatic regeneration function

Abstract

The air drying device with the automatic regeneration function comprises an air valve cavity, the air valve cavity comprises a first port, a second port, a third port and a fourth port, a first macromolecule dehumidification core block is arranged in the first port, a second macromolecule dehumidification core block is arranged in the second port, and a fan and a heat exchanger are arranged in the third port; a humidity sensor is arranged in the fourth port, an air valve is arranged in the middle of the air valve cavity, a main shaft of the air valve is connected with an air valve actuator, and the air valve actuator drives the air valve to reverse. The air drying device with the automatic regeneration function is adopted, the air valves are automatically switched, the paths in the air valve cavities are changed, through the paths in the different air valve cavities, the adsorption and dehumidification functions on outdoor fresh air and the desorption and regeneration functions on the macromolecule dehumidification core blocks are achieved, meanwhile, the functions of adsorption, desorption and the like are achieved, and the air drying efficiency is improved. And dry air is continuously, uniformly and independently provided for a required space.

Description

Technical Field

[0001] This application relates to the field of air drying equipment technology, and more specifically to an air drying equipment with automatic regeneration. Background Technology

[0002] In cleanrooms, negative pressure isolators need to continuously exhaust air to the outside to maintain safe negative pressure operation, thus requiring a fresh air supply. Generally, negative pressure isolators use local air intake. However, the air volume required by negative pressure isolators is very small, ranging from a few cubic meters per hour to tens of cubic meters per hour, which cannot be supplied by conventional equipment. Due to the exhaust ventilation of other operating equipment and the breathing needs of staff, a large amount of fresh air is also needed. However, the air humidity inside the negative pressure isolator is much higher than the requirements of other areas. Higher humidity requirements increase treatment costs. Treating all the fresh air in the cleanroom to meet the requirements of the negative pressure isolator results in significant energy waste. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this application is to provide an air drying device with automatic regeneration, thereby effectively solving the above-mentioned technical problems.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] This application provides an air drying device with automatic regeneration, including a valve chamber. The valve chamber includes a first port, a second port, a third port, and a fourth port. A first polymer dehumidifying core block is disposed in the first port, a second polymer dehumidifying core block is disposed in the second port, a fan and a heat exchanger are disposed in the third port, with the fan located near the outer side of the third port and the heat exchanger located in the direction of the fan's airflow. A humidity sensor is disposed in the fourth port. A valve is disposed in the middle of the valve chamber, and the main shaft of the valve is connected to a valve actuator. The valve actuator drives the valve to switch directions.

[0006] The air valve chamber is in the first direction, and the first port is connected to the fourth port to form a dehumidification and drying air duct. Outdoor fresh air is dehumidified by the first polymer dehumidification core block and then discharged into the negative pressure isolator after being detected by the humidity sensor. The third port is connected to the second port to form a desorption and regeneration air duct. Outdoor fresh air is blown out as dry hot air to the second polymer dehumidification core block after passing through the fan and heat exchanger to desorb and regenerate it.

[0007] The air valve chamber is in the second direction, and the second port is connected to the fourth port to form a dehumidification and drying air duct. Outdoor fresh air is dehumidified by the second polymer dehumidification core block after desorption and regeneration, and then discharged into the negative pressure isolator after being detected by the humidity sensor. The third port is connected to the first port to form a desorption and regeneration air duct. Outdoor fresh air is blown dry hot air to the first polymer dehumidification core block after passing through the fan and heat exchanger to desorb and regenerate it.

[0008] Furthermore, the polymer dehumidification core block includes a polymer adsorption-desorption material, which may include a polymer adsorbent, silica gel, molecular sieve, aluminum phosphate molecular sieve, or activated carbon.

[0009] Furthermore, the fan includes an axial flow fan or a centrifugal fan.

[0010] Furthermore, the heat exchanger includes an electric heater, a finned heat exchanger, or a microchannel heat exchanger.

[0011] Furthermore, the humidity sensor includes a capacitive humidity sensor, a resistive humidity sensor, or a thermal humidity sensor.

[0012] Furthermore, the damper actuator includes an electric damper actuator, a pneumatic damper actuator, or a hydraulic damper actuator.

[0013] Beneficial effects

[0014] This application provides an air drying device with automatic regeneration. By automatically switching air valves and changing the path within the valve chamber, it achieves both adsorption and dehumidification of outdoor fresh air and desorption and regeneration of the polymer dehumidification core. It simultaneously possesses adsorption and desorption functions, continuously and uniformly providing dry air to the required space. The device has a simple structure, is easy to operate, install, and maintain. Installed separately at the air inlet of a negative pressure isolator, it can effectively solve the air drying and dehumidification needs of small air volumes. Attached Figure Description

[0015] The accompanying drawings are provided to illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure. The shapes and sizes of the components in the drawings do not reflect actual proportions and are only intended to illustrate the content of this application.

[0016] Figure 1 This is a schematic diagram of the structural principle of the air valve cavity device in the first direction, provided in an embodiment of this application.

[0017] Figure 2This is a schematic diagram illustrating the structural principle of the air valve cavity provided in an embodiment of this application, mounted in the second direction.

[0018] In the above attached figures,

[0019] 1. First polymer dehumidifying core block; 2. Second polymer dehumidifying core block; 3. Fan; 4. Heat exchanger; 5. Humidity sensor; 6. Air valve chamber; 7. Air valve actuator; 8. Air valve; a. First port; b. Second port; c. Third port; d. Fourth port. Detailed Implementation

[0020] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0021] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. In this document, "electrical connection" includes the situation where constituent elements are connected together by an element having some electrical function. There is no particular limitation on the "electrically functioning element," as long as it enables the transmission and reception of electrical signals between the connected constituent elements. An "electrically functioning element" can be, for example, an electrode or wiring, a switching element such as a transistor, or other functional elements such as a resistor, inductor, or capacitor. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0022] In this application, the terms "upper," "lower," "inner," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Example

[0024] This application provides an air drying device with automatic regeneration, such as... Figure 1 and Figure 2 As shown, the device includes a damper chamber 6, which has a first port a, a second port b, a third port c, and a fourth port d. A damper 8 is disposed within the damper chamber 6. The main shaft of the damper 8 is connected to a damper actuator 7. The damper actuator 7 can be an electric damper actuator, a pneumatic damper actuator, or a hydraulic damper actuator, and also includes other control devices with equivalent functions. The damper actuator 7 can drive the damper 8 to rotate, thus achieving the function of switching between different paths within the damper chamber 6. A first polymer dehumidifying core block 1 is disposed within the first port a of the damper chamber 6, and a second polymer dehumidifying core block 1 is disposed within the second port b. Core block 2, the first polymer dehumidification core block 1 and the second polymer dehumidification core block 2 include core blocks using polymer adsorption and desorption materials, such as polymer adsorbents, silica gel, molecular sieves, aluminum phosphate molecular sieves, or activated carbon, etc. A fan 3 and a heat exchanger 4 are installed inside the third port c, with the fan 3 located near the outside of the third port c. The heat exchanger 4 is located in the airflow direction of the fan 3. The fan 3 includes an axial flow fan or a centrifugal fan, and also includes other air supply devices with equivalent functions. The heat exchanger 4 includes an electric heater, a finned heat exchanger, or a microchannel heat exchanger, and also includes other... With a heat exchange device having equivalent functions, fan 3 delivers air to heat exchanger 4 to form dry hot air. A humidity sensor 5 is installed in the fourth port d. The humidity sensor 5 includes a capacitive humidity sensor, a resistive humidity sensor, or a thermal humidity sensor, and also includes other humidity monitoring devices with equivalent functions. The damper actuator 7 drives the damper 8 to reverse, so that the damper chamber 6 is in the first direction. The first port a and the fourth port d are connected to form a dehumidified and drying air duct. Outdoor fresh air is dehumidified by the first polymer dehumidifying core block 1 and then, after being detected by the humidity sensor 5, is discharged into the negative pressure isolator. The third port c is connected to the fourth port d. The two ports b are connected to form a desorption and regeneration air duct. After passing through the fan 3 and heat exchanger 4, the outdoor fresh air is blown out as dry hot air to the second polymer dehumidifying core block 2 for desorption and regeneration. The air valve chamber 6 is in the second direction, with the second port b connected to the fourth port d to form a dehumidification and drying air duct. After the outdoor fresh air is dehumidified by the second polymer dehumidifying core block 2, it is detected by the humidity sensor 5 and then discharged into the negative pressure isolator. The third port c is connected to the first port a to form a desorption and regeneration air duct. After passing through the fan 3 and heat exchanger 4, the outdoor fresh air is blown out as dry hot air to the first polymer dehumidifying core block 1 for desorption and regeneration.

[0025] The specific working principle of an embodiment provided in this application is as follows:

[0026] like Figure 1As shown, when the air valve chamber 6 is in the first direction, the dehumidification and drying path from the first port a to the fourth port d (ad) is opened, and the desorption and regeneration path from the third port c to the second port b (cb) is also opened. Outdoor fresh air adsorbs moisture through the first polymer dehumidifying core block 1 in the first port a of the air valve chamber 6. The dried outdoor fresh air is discharged into the negative pressure isolator through the fourth port d of the air valve chamber 6. At the same time, the outdoor fresh air is sent to the heat exchanger 4 by the fan 3 in the third port c of the air valve chamber 6 for heating. The dried hot air desorbs and regenerates the second polymer dehumidifying core block 2 in the second port b, so that the adsorption function is restored.

[0027] When the humidity sensor 5 at the fourth port d detects that the moisture content of the dry outdoor fresh air exceeds a preset value, the humidity sensor 5 provides a signal, instructing the damper actuator 7 to control the damper 8 to automatically reciprocate. At this time, the damper chamber 6 reverses direction, changing from the first direction to the second direction, as shown below. Figure 2 As shown, when the air valve chamber 6 is in the second direction, the dehumidification and drying path from the second port b to the fourth port d (bd) is opened, and the desorption and regeneration path from the third port c to the first port a (ca) is also opened. At this time, the outdoor fresh air adsorbs moisture through the second polymer dehumidifying core block 2 in the second port b. The dried outdoor fresh air is discharged into the negative pressure isolator through the fourth port d of the air valve chamber 6. At the same time, the outdoor fresh air is sent to the heat exchanger 4 by the fan 3 in the third port c for heating. The dried hot air desorbs and regenerates the first polymer dehumidifying core block 1 in the first port a, so that the adsorption function is restored. This process is repeated to continuously perform automatic regeneration air drying. According to the humidity requirements of the monitored dry air, the air valve 8 is automatically switched to change the air flow path in the air valve chamber 6. Through different paths, adsorption and desorption functions are performed simultaneously, thereby realizing automatic regeneration air drying.

[0028] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

Claims

1. An air drying device with automatic regeneration, characterized in that: The device includes a damper cavity, comprising a first port, a second port, a third port, and a fourth port. A first polymer dehumidifying core block is disposed within the first port; a second polymer dehumidifying core block is disposed within the second port; a fan and a heat exchanger are disposed within the third port, with the fan located near the outer side of the third port and the heat exchanger positioned in the direction of the fan's airflow; a humidity sensor is disposed within the fourth port; and a damper is disposed in the center of the damper cavity. The main shaft of the damper is connected to a damper actuator, which drives the damper to reverse direction. The air valve chamber is in the first direction, and the first port is connected to the fourth port to form a dehumidification and drying air duct. Outdoor fresh air is dehumidified by the first polymer dehumidification core block and then discharged into the negative pressure isolator after being detected by the humidity sensor. The third port is connected to the second port to form a desorption and regeneration air duct. Outdoor fresh air is blown out as dry hot air to the second polymer dehumidification core block after passing through the fan and heat exchanger to desorb and regenerate it. The air valve chamber is in the second direction, and the second port is connected to the fourth port to form a dehumidification and drying air duct. Outdoor fresh air is dehumidified by the second polymer dehumidification core block after desorption and regeneration, and then discharged into the negative pressure isolator after being detected by the humidity sensor. The third port is connected to the first port to form a desorption and regeneration air duct. Outdoor fresh air is blown dry hot air to the first polymer dehumidification core block after passing through the fan and heat exchanger to desorb and regenerate it.

2. The air drying device with automatic regeneration as described in claim 1, characterized in that: The polymer dehumidification core block includes a polymer adsorption-desorption material, which may include a polymer adsorbent, silica gel, molecular sieve, aluminum phosphate molecular sieve, or activated carbon.

3. The air drying device with automatic regeneration as described in claim 1, characterized in that: The fan includes an axial flow fan or a centrifugal fan.

4. The air drying device with automatic regeneration as described in claim 1, characterized in that: The heat exchanger includes an electric heater, a finned heat exchanger, or a microchannel heat exchanger.

5. The air drying device with automatic regeneration as described in claim 1, characterized in that: The humidity sensor includes a capacitive humidity sensor, a resistive humidity sensor, or a thermal humidity sensor.

6. The air drying device with automatic regeneration as described in claim 1, characterized in that: The damper actuator includes an electric damper actuator, a pneumatic damper actuator, or a hydraulic damper actuator.

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