Direct connection controller structure

Abstract

The invention provides a direct connection controller structure. The direct connection controller structure comprises an end cover, a bottom plate, a circuit board assembly, a connector and a vibration isolator. Wherein a containing cavity is formed in the end cover, the circuit board assembly comprises a printed circuit board, a connecting base and an electronic component, the connecting base and the electronic component are arranged on the printed circuit board, the bottom plate is fixedly connected with the end cover so that the printed circuit board can be correspondingly arranged in the containing cavity, the connecting base extends out of the containing cavity and is correspondingly connected with the connector in an inserted mode, and the connector is used for being connected with external equipment; the end cover is arranged on an external mounting support through a fastener, and a plurality of vibration isolators are arranged between the end cover and the mounting support; the end cover is detachably connected with a respirator used for balancing atmospheric pressure inside and outside the controller. According to the invention, the production cost of the controller is greatly reduced, the electromagnetic compatibility, reliability and installation convenience of the controller are improved, and stable operation in a severe environment can be ensured.

Description

Technical Field

[0001] This application belongs to the technical field of diesel engine electronic control, and particularly relates to a structure of a direct connection controller. Background Art

[0002] With the development of diesel engine digital technology, the control and monitoring functions of diesel engines have gradually deepened, and the number of controllers has increased, resulting in an increase in production costs, and the contradiction between low production costs and high performance requirements has become prominent.

[0003] Currently, the pure plastic controllers used perform poorly in a harsh electromagnetic environment, are easily affected by electromagnetic interference, and affect the system stability. At the same time, the installation of traditional controllers requires multiple connectors and complex wiring, and the installation process is cumbersome. Due to the harsh working environment of diesel engines with frequent vibrations, the controllers are also extremely prone to the risks of poor contact or disconnection, resulting in a high failure rate. In addition, the controllers generate a high amount of heat during operation, and the existing heat dissipation effect of the controllers is not obvious, and the operation of the controllers is significantly limited. Summary of the Invention

[0004] In view of this, this application aims to propose a structure of a direct connection controller to solve at least one of the above problems.

[0005] To achieve the above object, the technical solution of this application is realized as follows: This application provides a structure of a direct connection controller, including an end cover, a bottom plate, a circuit board assembly, a connector, and a vibration isolator; Among them, an accommodation cavity is formed inside the end cover. The circuit board assembly includes a printed circuit board, a connection seat and electronic components arranged on the printed circuit board. The bottom plate is fixedly connected to the end cover so that the printed circuit board is correspondingly installed in the accommodation cavity. The connection seat extends out of the accommodation cavity and is correspondingly inserted into the connector, and the connector is used to connect external devices; The end cover is arranged on the installation support of the peripheral device through fasteners, and a plurality of vibration isolators are installed between the end cover and the installation support; A breather is detachably connected to the end cover for balancing the atmospheric pressure inside and outside the controller.

[0006] Further, the middle part of the end cover bulges upward, and a T-shaped cavity for accommodating electronic components is formed inside it. A T-shaped area corresponding to the T-shaped cavity is formed on the printed circuit board, and electronic components with a height are arranged thereon; Heat dissipation fins are provided on both sides of the bulge, and a heat dissipation surface corresponding to the heat dissipation fins is provided on the inner side of the end cover, and the heat dissipation surface is in contact with the upper surface of the printed circuit board.

[0007] Further, two-stage sunk platforms are provided inside the end cover; Among them, a closed glue injection groove is provided around the first-stage sunk platform, and silica gel is coated in the glue injection groove. After the bottom plate is compacted, it is fixedly connected to the first-stage sunk platform; On the heat dissipation surface of the second-stage sunk platform corresponding to the inner side of the heat dissipation fin, a plurality of overflow grease grooves are provided. When the printed circuit board is pressed and fitted with it, the thermal grease coated between them flows into the overflow grease grooves.

[0008] Furthermore, a plurality of positioning pins are provided at the corner positions of the second-stage sunk platform. The positioning pins protrude outside the plane of the second-stage sunk platform and are used for quickly positioning the printed circuit board; On both sides of the end cover, a plurality of mounting lugs are provided. A light hole is provided at the center of the mounting lug. A connecting arm is provided between the plurality of mounting lugs on each side, and reinforcing ribs are provided on the connecting arm and the outer peripheral side of the end cover. Chamfers are provided on the inner sides of the mounting lug and the connecting arm.

[0009] Furthermore, the vibration isolator is installed in the light hole through a fastener. One end of the grounding wire is arranged between the head end of the fastener and the top end of the mounting lug, and the other end of the grounding wire is arranged between the vibration isolator and the mounting seat.

[0010] Furthermore, the outer shape of the bottom plate matches the outer shape of the first-stage sunk platform. A bending bulge is provided in the middle, and the periphery is a convex edge. A bottom cabin is formed inside the bending bulge for accommodating the electronic components on the lower cover side of the printed circuit board; A plurality of compacting strips arranged at intervals are provided on the convex edge for compacting the printed circuit board on the second-stage sunk platform.

[0011] Furthermore, the connecting seat includes a plurality of connector flanges and a sub-socket correspondingly arranged in each connector flange. The connector flange is fixedly connected to the end cover through a fastener. A plurality of pins are provided on each sub-socket, and the pins are correspondingly matched with the pin pads provided on the printed circuit board; One end of the end cover close to the transverse direction of the T-shaped cavity is provided with a connection cabin communicated with the T-shaped cavity, and an opening corresponding to the sub-socket is provided thereon.

[0012] Furthermore, the connector head is composed of a connector head body and a plurality of rectangular tail accessories. A plurality of jacks are provided in the middle of the connector body, and the rectangular tail accessories are correspondingly arranged in the jacks; Flanges are provided on both sides of the connector head body, and a plurality of threaded through holes are provided thereon. Fasteners pass through the threaded through holes to fix the connector head body on the end cover; Fixed claws are provided on the outer periphery of the top of the connector head body, and fasteners pass through the fixed claws to fix the rectangular tail accessories.

[0013] Further, the side of the bulge away from the connecting seat is recessed inward to form a wedge-shaped pit, and a conical hole is provided in the wedge-shaped pit. The conical surface of the conical hole matches the O-ring rubber provided on the respirator to form a sealing band, and the circular hole at the bottom of the conical hole is buckled with the claw provided on the respirator.

[0014] Further, guardrail clusters are provided around the conical hole. The guardrail clusters are arranged with multiple layers of ring plates staggered, and there are multiple gaps in the staggered ring plates to form a drainage channel.

[0015] Compared with the prior art, the direct connection controller structure described in this application has the following beneficial effects: The direct connection controller structure described in this application greatly reduces the production cost of the controller, improves the electromagnetic compatibility, reliability and installation convenience of the controller, can ensure stable operation in harsh environments, and the controller has the advantages of simple structure, beautiful appearance and good maintenance performance. It is suitable for mass production, can overall improve the performance and reliability of the diesel engine control system, and meets the high-performance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation to this application. In the drawings: Figure 1 is a schematic view of the structure of a direct connection controller structure according to an embodiment of this application from a first angle; Figure 2 is a schematic view of the structure of a direct connection controller structure according to an embodiment of this application from a second angle; Figure 3 is an exploded view of a direct connection controller structure according to an embodiment of this application; Figure 4 is a schematic view of the structure of the end cover according to an embodiment of this application from a first angle; Figure 5 is a schematic view of the structure of the end cover according to an embodiment of this application from a second angle; Figure 6 is a schematic view of the structure of the bottom plate according to an embodiment of this application from a first angle; Figure 7 is a schematic view of the structure of the bottom plate according to an embodiment of this application from a second angle; Figure 8 is a first schematic view of the circuit board assembly according to an embodiment of this application; Figure 9 is a second schematic view of the circuit board assembly according to an embodiment of this application from a second angle; Figure 10 is a schematic view of the printed circuit board structure according to an embodiment of this application; Figure 11Schematic diagram of the connection seat structure according to the embodiment of the present application; Figure 12 Schematic diagram of the first angle structure of the connector according to the embodiment of the present application; Figure 13 Schematic diagram of the second angle structure of the connector according to the embodiment of the present application; Figure 14 Schematic diagram of the respirator structure according to the embodiment of the present application.

[0017] Explanation of reference numerals: 1 - End cover; 11 - T-shaped cavity; 12 - Heat dissipation fins; 13 - Glue injection groove; 14 - Grease overflow groove; 15 - Positioning pin; 16 - Mounting lug; 17 - Connecting arm; 18 - Connection cabin; 19 - Opening; 110 - Wedge-shaped pit; 111 - Guardrail cluster; 112 - Internal thread post; 113 - External thread post; 2 - Bottom plate; 21 - Bending bulge; 22 - Flange; 23 - Bottom cabin; 24 - Compaction strip; 3 - Circuit board assembly; 31 - Printed circuit board; 32 - Connection seat; 33 - Connector flange; 34 - Sub-socket; 35 - Pin; 36 - Pin pad; 37 - Avoidance concave; 4 - Connector; 41 - Connector body; 42 - Rectangular tail attachment; 43 - Jack; 44 - Fixed claw; 45 - Countersunk head screw; 5 - Vibration isolator; 6 - Respirator; 7 - Connecting wire. Detailed implementation manners

[0018] To make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0019] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the ordinary meanings understood by those of ordinary skill in the field to which the present application belongs. The "first", "second" and similar terms used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationships may also change accordingly.

[0020] Please refer to Figures 1 to 3 As shown, this embodiment provides a direct connection controller structure, including an end cover 1, a bottom plate 2, a circuit board assembly 3, a connector 4 and a vibration isolator 5; Among them, an accommodation cavity is formed inside the end cover 1. The circuit board assembly 3 includes a printed circuit board 31, a connector base 32 and electronic components arranged on the printed circuit board 31. The bottom plate 2 is fixedly connected to the end cover 1 so that the printed circuit board 31 is correspondingly installed in the accommodation cavity. The connector base 32 extends out of the accommodation cavity and is correspondingly inserted into the connector 4, and the connector 4 is used to connect an external device; The end cover 1 is arranged on the mounting seat of the peripheral device through fasteners, and a plurality of vibration isolators 5 are arranged between the end cover 1 and the mounting seat; A breather 6 is detachably connected to the end cover 1 for balancing the atmospheric pressure inside and outside the controller.

[0021] A direct connection connector structure described in this embodiment greatly reduces the production cost of the controller, improves the electromagnetic compatibility, reliability and installation convenience of the controller, can ensure stable operation in a harsh environment. The controller has the advantages of simple structure, beautiful appearance and good maintenance performance, is suitable for mass production, can overall improve the performance and reliability of the diesel engine control system, and meets high-performance requirements.

[0022] As Figure 4 shown, the end cover 1 is a thin-walled aluminum casting or can also be a machined part. Its middle part bulges, and a T-shaped cavity 11 is formed inside. Heat dissipation fins 12 are provided on both sides of the bulge, and a heat dissipation surface is provided on the inner side corresponding to the heat dissipation fins 12. The heat dissipation surface is in contact with the upper surface of the printed circuit board 31 on the circuit board assembly 3, and a heat conduction pad and thermal grease can be arranged therebetween to facilitate heat conduction. On the lower surface of the printed circuit board 31, a surface-mounted power integrated block or other heating elements can be welded. Dense heat conduction pad mesh holes are provided on the printed circuit board 31 at the position of the heating element for conducting the heat of the heating element to the upper surface of the printed circuit board 31, and then to the heat dissipation fins 12 on the end cover 1, and further dissipating the heat into the atmosphere.

[0023] As Figure 5 shown, two-stage sunk platforms are provided inside the end cover 1. The first-stage sunk platform matches the bottom plate 2, and the second-stage sunk platform matches the printed circuit board 31 of the circuit board assembly 3. A plurality of internal threaded posts 112 are provided around the first-stage sunk platform. The internal threaded posts 112 are cylindrical or D-shaped, and a threaded hole is provided in the center. The bottom plate 2 is fixed to the end cover 1 through pan head screws.

[0024] A closed glue storage groove is also provided around the first-stage sunk platform. The cross-section of the glue storage groove is generally rectangular. When assembling, silica gel is applied in the glue storage groove. After the bottom plate 2 is pressed on, it plays a sealing role. A plurality of grease overflow grooves 14 are provided on the inner heat dissipation surface corresponding to the heat dissipation fins 12 of the second-stage sunk platform. The cross-section of the grease overflow grooves 14 is generally D-shaped. When the printed circuit board 31 is attached to it, the thermal grease applied therebetween flows into the grease overflow grooves 14 under the extrusion effect.

[0025] A positioning pin 15 is provided at the corner of the second-step sunken platform. The positioning pin 15 is cylindrical, protruding outside the plane of the second-step sunken platform, and its height is slightly shorter than the thickness of the circuit board, facilitating the quick and accurate positioning of the assembly of the circuit board assembly 3.

[0026] On both sides of the end cover 1, there are a plurality of mounting lugs 16 (in this embodiment, only two mounting lugs 16 are respectively installed on both sides of the end cover 1 as an example for explanation, and the number of mounting lugs 16 is not specifically limited here). The center of the mounting lug 16 is a light hole. The two mounting lugs 16 on each side are connected together by a connecting arm 17. Reinforcing ribs are provided on the connecting arm 17 and the outer peripheral side of the end cover 1. Large chamfers are provided on the inner sides of the mounting lug 16 and the connecting arm 17, facilitating assembly.

[0027] Vibration isolators 5 are installed in the light holes of the mounting lugs 16. Generally, there are 4 vibration isolators 5. One end of the grounding wire is pressed on the upper end of the vibration isolator 5. When the controller is installed, the other end of the grounding wire is pressed between the vibration isolator 5 and the mounting seat.

[0028] Such as Figure 6 and Figure 7 As shown, the outer shape of the bottom plate 2 matches the outer shape of the first-step sunken platform of the end cover 1. A bending-resistant bulge 21 is provided in the middle, and convex edges 22 are provided around. The other side of the bending-resistant bulge 21 forms a bottom cabin 23, which can accommodate the components on the lower side of the circuit board assembly 3. A plurality of compaction strips 24 are provided on the upper side of the convex edge 22. The compaction strips 24 protrude from the upper surface of the convex edge 22. The circuit board assembly 3 has no independent mounting screws. The force is transmitted to the second-step sunken platform of the end cover 1 through the pan head screw - convex edge 22 - compaction strip 24 - printed circuit board 31 to realize the fastening of the circuit board assembly 3.

[0029] Such as Figure 8 As shown, the circuit board assembly 3 is composed of a printed circuit board 31 and a rectangular connecting seat 32. The printed circuit board 31 is provided with pads for pins 35 that match the pins 35 on the rectangular connecting seat 32. The rectangular connecting seat 32 is welded to the printed circuit board 31. A plurality of avoidance concave portions 37 are provided around the printed circuit board 31 to adapt to the structure of the end cover 1. Light holes for installation are provided near the connector installation position on the printed circuit board 31. Screws for fastening the rectangular connecting seat 32 can be tightened through the light holes for installation. Two positioning holes are provided on the printed circuit board 31, which match the upper board positioning pins 15 on the end cover 1. The diameter of the positioning holes is slightly larger than the outer diameter of the positioning pins 15.

[0030] Such as Figure 9 and Figure 10As shown in the figure, electronic components can be soldered on both specific areas on both sides of the printed circuit board 31. The circuit board assembly 3 corresponds to the T-shaped cavity 11 of the end cover 1 to form a T-shaped area, where relatively tall electronic components can be arranged. While in the corresponding positions of the heat dissipation surface outside the T-shaped area, the electronic components can only be arranged under the printed circuit board 31. In the positions of the row of power components, the printed circuit board 31 is provided with densely arranged rows of heat-conducting pads to enable the heat generated by the power components to be conducted along the heat-conducting pads to the upper side of the printed circuit board 31, and then introduced into the atmosphere through the heat dissipation surface and the heat dissipation fins 12 of the end cover 1.

[0031] As Figure 5 shown, the front end of the end cover 1 is provided with a connection cabin 18. The inner connection cabin 18 is rectangular, and is provided with a rectangular opening 19 that matches the sub-socket 34. A plurality of inner threaded posts 112 and outer threaded posts 113 are provided around the rectangular opening 19. The thread direction of the inner threaded posts 112 opens downward, that is, the direction in which the circuit board assembly 3 is inserted; the outer threaded posts 113 open upward, that is, the direction in which the rectangular connector 4 is inserted.

[0032] As Figure 8 and Figure 11 shown, the printed circuit board 31 and the rectangular connection base 32 adopt a direct connection method. The rectangular connection base 32 connects a plurality of sub-sockets 34 together by a connector flange 33. A plurality of mounting light holes are provided on the connector flange 33, and a plurality of pins 35 of the same or different sizes are provided in each sub-socket 34. The rectangular connection base 32 and the end cover 1 are fixed by countersunk head screws 45, passing through the mounting light holes on the printed circuit board 31 and the mounting light holes on the connector flange 33, and tightening the connector flange 33 onto the inner threaded posts 112.

[0033] As Figure 12 and Figure 13 shown, the rectangular connector 4 is composed of a connector 4 body and a plurality of rectangular tail accessories 42. A plurality of jacks 43 of the same or different specifications are provided in the middle of the connector 4 body, and the rectangular tail accessories 42 are correspondingly arranged in the jacks 43; flanges are provided on both sides of the connector 4 body, and a plurality of threaded through holes are provided thereon. When the rectangular connector 4 is inserted into the rectangular connection base 32, the rectangular connector 4 is fixed to the end cover 1 through anti-loosening screws, threaded through holes, and outer threaded posts 113. A fixing claw 44 is provided on the outer periphery of the top of the connector 4 body, and the fixing claw 44 is also provided with threaded through holes. The countersunk head screw 45 passes through the fixing claw 44 to fix the rectangular tail accessory 42, and the rectangular tail accessory 42 is electrically connected to the sub-socket 34. A plurality of countersunk holes are provided at the lower part of the rectangular tail accessory 42, and the rectangular tail accessory 42 is fixed to the connector 4 body by countersunk head screws 45.

[0034] As Figure 14As shown, the snap-in breather 6 is made of plastic and formed by molding. A semi-permeable membrane is provided inside the head. The exterior is circular, with claws at the bottom, and an O-ring is provided at the root of the claws. The function of the snap-in breather 6 is to balance the atmospheric pressure inside and outside the controller box and block the entry of liquids such as rainwater.

[0035] As Figure 4 shown, a wedge-shaped pit 110 is formed by the inward depression on one side of the bulge. A tapered hole is provided in the middle of the wedge-shaped pit 110. The tapered surface of the tapered hole matches the O-ring on the snap-in breather 6 to form a sealing band. The round hole at the bottom of the tapered hole is buckled with the claws on the snap-in breather 6.

[0036] The snap-in breather 6 is matched and sealed with the tapered hole at the center of the guardrail cluster 111 of the end cover 1 to block the entry of rainwater. Specifically, a guardrail cluster 111 is provided around the tapered hole. The guardrail cluster 111 is composed of two layers of ring plates. The ring plates are staggered with multiple notches, which has the function of draining water. The wedge-shaped pit 110 and the guardrail cluster 111 play a protective role for the snap-in breather 6.

[0037] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

[0038] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A direct connection controller structure, characterized in that: It includes an end cover, a bottom plate, a circuit board assembly, a connector, and a vibration isolator; Among them, an accommodation cavity is formed inside the end cover. The circuit board assembly includes a printed circuit board, a connection seat and electronic components arranged on the printed circuit board. The bottom plate is fixedly connected to the end cover so that the printed circuit board is correspondingly installed in the accommodation cavity. The connection seat extends out of the accommodation cavity and is correspondingly inserted into the connector, and the connector is used to connect an external device; The end cover is arranged on the installation support of the peripheral device through fasteners, and a plurality of vibration isolators are installed between the end cover and the installation support; A breather is detachably connected to the end cover for balancing the atmospheric pressure inside and outside the controller.

2. A direct connection controller structure according to claim 1, characterized in that: The middle part of the end cover bulges upward, and a T-shaped cavity for accommodating electronic components is formed inside it. A T-shaped area corresponding to the T-shaped cavity is formed on the printed circuit board, and electronic components with height are arranged thereon; Heat dissipation fins are provided on both sides of the bulge, and a heat dissipation surface corresponding to the heat dissipation fins is provided on the inner side of the end cover, and the heat dissipation surface is in contact with the upper surface of the printed circuit board.

3. A direct connection controller structure according to claim 2, characterized in that: Two-stage sinking platforms are provided inside the end cover; Among them, a closed glue injection groove is provided around the first-stage sinking platform, and silica gel is applied in the glue injection groove. After the bottom plate is compacted, it is fixedly connected to the first-stage sinking platform; A plurality of grease overflow grooves are provided on the heat dissipation surface of the second-stage sinking platform corresponding to the inner side of the heat dissipation fins. When the printed circuit board is extruded and attached to it, the thermal grease applied between them flows into the grease overflow grooves.

4. A direct connection controller structure according to claim 3, characterized in that: A plurality of positioning pins are provided at the corner positions of the second-stage sinking platform. The positioning pins protrude outside the plane of the second-stage sinking platform for quickly positioning the printed circuit board; A plurality of mounting lugs are provided on both sides of the end cover. Light holes are provided at the centers of the mounting lugs. A connecting arm is provided between the plurality of mounting lugs on each side, and reinforcing ribs are provided on the connecting arm and the peripheral side of the end cover. Chamfers are provided on the inner sides of the mounting lugs and the connecting arm.

5. A direct connection controller structure according to claim 4, characterized in that: The vibration isolator is installed in the light hole through fasteners. One end of the grounding wire is arranged between the head end of the fastener and the top end of the mounting lug, and the other end of the grounding wire is arranged between the vibration isolator and the installation support.

6. A direct connection controller structure according to claim 3, characterized in that: The outer shape of the bottom plate matches the outer shape of the first-stage sinking platform. A bending-resistant bulge is provided in the middle, and convex edges are provided around it. A bottom cabin is formed inside the bending-resistant bulge for accommodating the electronic components on the lower cover side of the printed circuit board; A plurality of compacting strips arranged at intervals are provided on the convex edge for compacting the printed circuit board on the second-stage sinking platform.

7. A direct connection controller structure according to claim 2, characterized in that: The connection base includes a plurality of connector flanges and sub-sockets respectively arranged in each of the connector flanges. The connector flanges are fixedly connected to the end cover through fasteners. A plurality of pins are provided on each sub-socket, and the pins are correspondingly matched with the pin pads provided on the printed circuit board. One end of the end cover close to the transverse direction of the T-shaped cavity is provided with a connection cabin communicating with the T-shaped cavity, and an opening corresponding to the sub-socket is formed thereon.

8. The structure of a direct connection controller according to claim 7, wherein: The connector head is composed of a connector head body and a plurality of rectangular tail accessories. A plurality of jacks are provided in the middle of the connector body, and the rectangular tail accessories are correspondingly arranged in the jacks. Flanges are provided on both sides of the connector head body, and a plurality of threaded through holes are formed thereon. Fasteners pass through the threaded through holes to fix the connector head body on the end cover. Fixing claws are provided on the outer periphery of the top of the connector head body, and fasteners pass through the fixing claws to fix the rectangular tail accessories.

9. The structure of a direct connection controller according to claim 7, wherein: One side of the bulge far away from the connection base is recessed inward to form a wedge-shaped pit. A tapered hole is provided in the wedge-shaped pit. The tapered surface of the tapered hole is matched with the O-ring provided on the respirator to form a sealing band. The round hole at the bottom of the tapered hole is buckled with the claw provided on the respirator.

10. The structure of a direct connection controller according to claim 9, wherein: A guardrail cluster is provided around the tapered hole. The guardrail cluster is formed by staggered arrangement of multiple layers of ring plates. The ring plates are staggered with multiple notches to form a drainage channel.

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