Air dryer and air supply system

Abstract

The utility model discloses an air dryer and an air supply system, the air dryer comprises a shell, a drying agent cavity extending from the top of the shell to the bottom of the shell is arranged in the shell, and a bottom cavity communicated with the drying agent cavity is arranged on the inner side of the bottom of the shell. An air inlet communicated with the drying agent cavity is formed in the side wall of the top of the shell, an air outlet communicated with the bottom cavity is formed in the side wall, close to the bottom cavity, of the shell, and a lower cover plate is integrally formed at the bottom of the shell in an injection molding mode. The air dryer adopting the structure is low in manufacturing cost, and the reliability and the air tightness of the connection between the lower cover plate and the shell are high.

Description

Technical Field

[0001] The utility model relates to the technical field of dryer equipment, and more specifically, to an air dryer. In addition, the utility model also relates to an air supply system comprising the air dryer. Background Art

[0002] An air supply system is a device that compresses and delivers air, typically from the atmosphere. The compressed air is then delivered to a container for future use. Since compressed air increases in temperature and humidity, humid air can corrode components, and condensed liquid water or ice can also cause components to become stuck. Therefore, air supply systems are typically equipped with an air dryer to remove excess moisture from the compressed air.

[0003] Please refer to Figure 1 The air inlet and outlet of the existing air dryer are both arranged on the side of the shell 4 to more conveniently connect with the air valve block in the air supply system, and the bottom of the shell is provided with a bottom cavity connected to the desiccant cavity. The bottom of the shell is also provided with a communicating hole located on the upper side of the bottom cavity and connected to the bottom cavity. The communicating hole extends upward along the axial direction of the shell to connect with the air outlet, so that the air dried by the desiccant cavity flows through the bottom cavity and then flows to the air outlet on the side of the shell through the communicating hole.

[0004] In addition, since a connecting hole extending in the axial direction of the shell needs to be set on the upper side of the bottom cavity of the shell, a bottom opening needs to be set at the bottom of the shell to facilitate the setting of the core shaft to form this connecting hole, and the lower cover plate is welded to the bottom opening by welding during assembly.

[0005] Therefore, the existing air dryer has added the steps of setting the core shaft and welding the lower cover during production, which has a high production cost. In addition, compared with the integral injection molding of the lower cover and the bottom of the shell, assembling the lower cover to the bottom of the shell by welding will result in poor reliability and airtightness of the connection between the lower cover and the shell.

[0006] In summary, how to solve the problems of high manufacturing cost of existing air dryers and poor reliability and airtightness of the connection between the lower cover and the outer shell is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0007] In view of this, an object of the present invention is to provide an air dryer having low manufacturing cost and high reliability and airtightness of the connection between the lower cover and the outer shell.

[0008] Another object of the present invention is to provide an air supply system comprising the above-mentioned air dryer.

[0009] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0010] An air dryer includes a shell, wherein a desiccant cavity extending from the top to the bottom of the shell is provided inside the shell, a bottom cavity connected to the desiccant cavity is provided on the inner side of the bottom of the shell, an air inlet connected to the desiccant cavity is provided on the top side wall of the shell, an air outlet connected to the bottom cavity is provided on the side wall of the shell adjacent to the bottom cavity, and a lower cover plate is integrally injection-molded on the bottom of the shell.

[0011] Preferably, the air outlet is a circular hole with a notch, and the notch intersects with the bottom cavity.

[0012] Preferably, both side edges of the notch are located at the bottom of the desiccant cavity.

[0013] Preferably, an arc transition section is provided at the connection between the inner wall of the air outlet and the inner wall of the bottom cavity.

[0014] Preferably, the inner diameter of the air outlet is larger than the inner diameter of the air inlet.

[0015] Preferably, an external connecting tube is provided on the side wall of the shell, and the external connecting tube is placed outside the air outlet and communicated with the air outlet.

[0016] Preferably, the housing is integrally injection-molded with a plurality of mounting ports and limit blocks on the side wall between the air inlet and the air outlet, the mounting ports being used for assembly and connection with the air supply system, and the limit blocks being used for limiting the inspection bolts of the air supply system.

[0017] Preferably, there are two desiccant cavities, and the bottom cavity is located between the two desiccant cavities.

[0018] Preferably, the two desiccant cavities are spaced apart and located at two sides of the shell, and the air inlet, the air outlet and the bottom cavity are located in the middle of the shell in sequence from top to bottom.

[0019] An air supply system comprises any one of the air dryers described above.

[0020] Compared with the air dryer in the prior art, the bottom cavity of the shell of the air dryer provided by the utility model is directly connected to the air outlet. There is no need to set a connecting hole extending in the axial direction of the shell on the upper side of the bottom cavity, and the step of setting the core shaft is eliminated. Therefore, there is no need to set a bottom opening at the bottom of the shell. The lower cover plate and the shell can be directly injection molded as one piece, eliminating the step of welding the lower cover plate.

[0021] In summary, the present application eliminates the steps of setting the core shaft and welding the lower cover, thereby reducing the production cost of the air dryer. In addition, the lower cover and the shell are integrally injection molded, thereby improving the reliability and airtightness of the connection between the lower cover and the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 is a cross-sectional view of an air dryer in the prior art;

[0024] Figure 2 A cross-sectional view of the air dryer provided by the utility model;

[0025] Figure 3 This is a structural schematic diagram of the air dryer provided by the utility model.

[0026] Reference numerals:

[0027] 1-upper cover; 2-compression spring; 3-upper support cover; 4-housing; 5-desiccant cavity; 6-lower dustproof pad; 7-bottom cavity; 8-lower support cover; 9-connecting hole; 10-air outlet; 11-upper dustproof pad; 12-lower cover; 13-air inlet; 14-external connecting tube; 15-installation port; 16-limit block. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The core of the utility model is to provide an air dryer, which has low manufacturing cost and high reliability and air tightness of the connection between the lower cover plate and the shell.

[0030] Another core of the present invention is to provide an air supply system including the above-mentioned air dryer.

[0031] It should be noted that in this embodiment, the orientation or position relationship indicated by "upper" and "lower" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0032] Please refer to Figure 2 and Figure 3 The present application provides an air dryer, including a shell 4, a desiccant cavity 5 extending from the top to the bottom of the shell 4 is provided inside the shell 4, a bottom cavity 7 communicating with the desiccant cavity 5 is provided on the inner side of the bottom of the shell 4, an air inlet 13 communicating with the desiccant cavity 5 is provided on the top side wall of the shell 4, an air outlet 10 communicating with the bottom cavity 7 is provided on the side wall of the shell 4 adjacent to the bottom cavity 7, and a lower cover plate 12 is integrally injection-molded on the bottom of the shell 4.

[0033] It should be noted that the desiccant cavity 5 is filled with a desiccant for absorbing moisture from the air. The desiccant cavity 5 is arranged inside the housing 4 and extends from the top of the housing 4 to the bottom of the housing 4 to fully utilize the internal space of the housing 4, thereby facilitating the enhancement of the drying effect of the air dryer. In addition, the top of the housing 4 is open and is covered with an upper cover plate 1. Between the upper cover plate 1 and the top of the desiccant cavity 5, a compression spring 2, an upper support cover 3, and an upper dustproof pad 11 are arranged from top to bottom. The bottom of the housing 4 is provided with a lower cover plate 12. The lower cover plate 12 is integrally injection-molded with the housing 4, so that the bottom end of the housing 4 is closed. A lower dustproof pad 6 and a lower support cover 8 are arranged from top to bottom between the bottom end of the desiccant cavity 5 and the lower cover plate 12. The specific configuration of the compression spring 2, upper support cover 3, upper dustproof pad 11, lower dustproof pad 6, and lower support cover 8 can be referred to the prior art. Since they are not the focus of protection of this application, they will not be described in detail here.

[0034] In addition, an air inlet 13 is provided on the top sidewall of the housing 4, communicating with the upper portion of the desiccant cavity 5. A bottom cavity 7 communicating with the desiccant cavity 5 is provided on the inner bottom side of the housing 4. Preferably, the bottom cavity 7 is provided close to the lower cover 12, i.e., close to the bottom end of the housing 4, to facilitate increasing the air flow path through the desiccant cavity 5 and thereby enhance the air drying effect. The air inlet 13 is provided on the sidewall of the housing 4 adjacent to the bottom cavity 7, facilitating direct communication between the air inlet 13 and the bottom cavity 7.

[0035] Compared with the air dryer in the prior art, the bottom cavity 7 of the shell 4 of the above-mentioned air dryer is directly connected to the air outlet 10. There is no need to set a connecting hole 9 extending in the axial direction of the shell 4 on the upper side of the bottom cavity 7, and the step of setting the core shaft is eliminated. Therefore, there is no need to set a bottom opening at the bottom of the shell 4. The lower cover plate 12 can be directly injection molded as one piece with the shell 4, and the step of welding the lower cover plate 12 is eliminated.

[0036] In summary, the present application eliminates the steps of setting the core shaft and welding the lower cover plate 12, thereby reducing the production cost of the air dryer. In addition, the lower cover plate 12 and the housing 4 are integrally injection molded, thereby improving the reliability and airtightness of the connection between the lower cover plate 12 and the housing 4.

[0037] Based on the above examples, please refer to Figure 2 and Figure 3 The air outlet 10 is a circular hole with a notch, which intersects the bottom cavity 7. In other words, the air outlet 10 is not a complete circular hole, but rather a complete circular hole intersecting the bottom cavity 7. The missing portion of the air outlet 10 after the intersection, i.e., the notch, is shared with the bottom cavity 7. Therefore, when the air outlet 10 is connected to the air valve block of the air supply system, the circular interface connection between the air outlet 10 and the air valve block is not affected.

[0038] For further information, please refer to Figure 2 and Figure 3 The edges of the notch are located at the bottom of the desiccant chamber 5. That is, the notch and the bottom cavity 7 connected to it are both placed at the bottom of the desiccant chamber 5, so that the bottom cavity 7 and the air outlet 10 form a circle c for the dried air to flow out. At the same time, the air outlet channel is placed at the bottom of the desiccant chamber 5, which maximizes the air flow path in the desiccant chamber 5 and fully dries the air.

[0039] Based on the above examples, please refer to Figure 2 and Figure 3 A circular arc transition section is provided at the connection between the inner wall of the air outlet 10 and the inner wall of the bottom cavity 7 .

[0040] It can be understood that in the process of the air dried by the desiccant cavity 5 flowing through the bottom cavity 7 to the air outlet 10, if the connection between the bottom cavity 7 and the air outlet 10 is a circular arc transition section, the curve of the circular arc transition section is smooth, which can reduce the resistance to air flow and make the air flow more smoothly and quickly into the air outlet 10, thereby helping to improve the air flow efficiency of the air dryer, and then improve the drying efficiency of the air dryer.

[0041] Based on the above examples, please refer to Figure 2 and Figure 3The inner diameter of the air outlet 10 is larger than the inner diameter of the air inlet 13. It is understandable that since the air outlet 10 needs to communicate with the bottom cavity 7, increasing the inner diameter of the air outlet 10 can make it easier for the air outlet 10 to communicate with the bottom cavity 7, thereby ensuring that the dried air quickly flows through the bottom air cavity and the air outlet 10 in sequence and is discharged.

[0042] Based on the above examples, please refer to Figure 3 An external connecting tube 14 is provided on the side wall of the housing 4. The external connecting tube 14 is placed outside the air outlet 10 and communicates with the air outlet 10. It is understandable that since the air outlet 10 needs to be connected to the air valve block of the air supply system, when the air dryer is installed on the air supply system, the external connecting tube 14 outside the air outlet 10 can ensure the sealing of the connection between the air outlet 10 and the air valve block of the air supply system, so that the air passes through the desiccant cavity 5, the bottom cavity 7, the air outlet 10, and the external connecting tube 14 in sequence and is discharged to the air valve block.

[0043] Based on the above examples, please refer to Figure 3 The side wall of the shell 4 between the air inlet 13 and the air outlet 10 is integrally injection-molded with several mounting ports 15 and limit blocks 16. The mounting ports 15 are used for assembly and connection with the air supply system, and the limit blocks 16 are used to limit the maintenance bolts of the air supply system.

[0044] As will be appreciated, since the air inlet 13 and air outlet 10 are located at the top and bottom of the sidewall of the housing 4, respectively, several mounting openings 15 and stoppers 16 are provided on the sidewall of the housing 4 between the air inlet 13 and the air outlet 10. This fully utilizes the space provided on the sidewall of the housing 4 and results in a more compact air dryer design. Furthermore, when the air dryer is mounted to the air supply system through the mounting openings 15, the stoppers 16, positioned above the air supply system's access bolts, restrict movement of the air dryer's access bolts and prevent them from being completely removed.

[0045] Based on the above examples, please refer to Figure 2 and Figure 3 There are two desiccant cavities 5 , and the bottom cavity 7 is located between the two desiccant cavities 5 .

[0046] Specifically, bottom cavity 7 is disposed between the two desiccant chambers 5 and communicates with both. It should be noted that the upper portions of each desiccant chamber 5 may share a single air inlet 13 for air intake, or each chamber may have a corresponding air inlet 13 for air intake. Preferably, air inlet 13 is located between the two desiccant chambers 5 and communicates with both. In this manner, air flows into the two desiccant chambers 5 through air inlets 13. The air within the two desiccant chambers 5 then flows through bottom cavity 7 and is discharged through air outlet 10. This not only increases the drying efficiency and effectiveness of the air dryer, but also allows the two desiccant chambers 5 to share air inlet 13, bottom cavity 7, and air outlet 10, saving manufacturing costs.

[0047] For further information, please refer to Figure 2 and Figure 3 The two desiccant cavities 5 are spaced apart on both sides of the shell 4, and the air inlet 13, the air outlet 10 and the bottom cavity 7 are located in the middle of the shell 4 from top to bottom, making the structural design of the air dryer more compact and stable.

[0048] In addition to the above-mentioned air dryer, the present invention also provides an air supply system including the air dryer disclosed in the above-mentioned embodiment. For the structures of other parts of the air supply system, please refer to the prior art and will not be described in detail herein.

[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0050] The above describes in detail the air dryer and air supply system provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is only intended to help understand the method and core concept of the present invention. It should be noted that for ordinary technicians in this technical field, without departing from the principles of the present invention, various improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An air dryer, characterized in that: The invention comprises a shell (4), wherein a desiccant cavity (5) extending from the top to the bottom of the shell (4) is provided inside the shell (4), a bottom cavity (7) communicating with the desiccant cavity (5) is provided on the inner side of the bottom of the shell (4), an air inlet (13) communicating with the desiccant cavity (5) is provided on the top side wall of the shell (4), an air outlet (10) communicating with the bottom cavity (7) is provided on the side wall of the shell (4) adjacent to the bottom cavity (7), and a lower cover plate (12) is integrally injection-molded at the bottom of the shell (4).

2. The air dryer according to claim 1, characterized in that The air outlet (10) is a circular hole with a notch, and the notch intersects with the bottom cavity (7).

3. The air dryer according to claim 2, characterized in that The two side edges of the notch are located at the bottom of the desiccant cavity (5).

4. The air dryer according to claim 1, characterized in that An arc transition section is provided at the connection between the inner wall of the air outlet (10) and the inner wall of the bottom cavity (7).

5. The air dryer according to claim 1, characterized in that The inner diameter of the air outlet (10) is greater than the inner diameter of the air inlet (13).

6. The air dryer according to claim 1, characterized in that An external connection tube (14) is provided on the side wall of the outer shell (4), and the external connection tube (14) is placed outside the air outlet (10) and communicated with the air outlet (10).

7. The air dryer according to claim 1, characterized in that The housing (4) is integrally injection-molded with a plurality of mounting openings (15) and position-limiting blocks (16) on a side wall located between the air inlet (13) and the air outlet (10). The mounting openings (15) are used for assembly and connection with the air supply system, and the position-limiting blocks (16) are used for limiting the position of the air supply system maintenance bolts.

8. The air dryer according to any one of claims 1 to 7, characterized in that The number of the desiccant cavities (5) is two, and the bottom cavity (7) is located between the two desiccant cavities (5).

9. The air dryer according to claim 8, characterized in that The two desiccant cavities (5) are spaced apart and located on both sides of the housing (4), and the air inlet (13), the air outlet (10) and the bottom cavity (7) are located in the middle of the housing (4) in sequence from top to bottom.

10. An air supply system, characterized in that: The air dryer comprises the air dryer according to any one of claims 1 to 9.

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