Dustproof and heat dissipation structure for frequency converter

Abstract

This utility model relates to the field of frequency converter technology, specifically a dustproof and heat dissipation structure for frequency converters. It includes a housing, inside which a frequency converter element is housed. A control panel is located on one side of the frequency converter element. An observation window is located on one side of the housing. A protective device is provided on the inner wall of the housing, comprising a partition plate fixedly connected to the inner wall of the housing. A through hole is opened on one side of the partition plate. A support frame, in a cross shape, is fixedly connected to the upper surface of the partition plate. A motor is fixedly connected to the upper surface of the support frame, and a rotating rod is rotatably connected to the lower surface of the support frame. The output end of the motor is fixedly connected to the rotating rod. This utility model solves the problem that some existing frequency converters, although equipped with heat dissipation holes, cannot adequately dissipate heat due to their own cooling system, leading to damage to electronic components, significantly increased costs, and inability to complete frequency conversion operations normally.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and in particular to a dustproof and heat dissipation structure for frequency converters. Background Technology

[0002] A frequency converter is a power electronic device used to control the speed and torque of an AC motor. It achieves precise control of the motor by changing the frequency and voltage of the power supply. It is widely used in industrial automation, energy-saving renovation, HVAC systems, and other fields. Its main components are as follows: rectifier unit, DC bus, inverter unit, etc.

[0003] Existing technologies, such as the utility model with publication number CN221728143U, disclose a frequency converter suitable for outdoor use. This utility model relates to the field of outdoor frequency converter technology, specifically disclosing a frequency converter suitable for outdoor use, including a frequency converter body. A frequency converter assembly is fixedly installed inside the frequency converter body by bolts. Several vertically spaced heat dissipation slots are formed on both sides of the frequency converter body. Each heat dissipation slot has a rainproof and dustproof structure fixedly installed inside by bolts. Air-cooled heat dissipation structures are fixedly installed on both sides inside the frequency converter body. This utility model's technical solution, by setting rainproof and dustproof structures at the heat dissipation slots of the frequency converter body, prevents rainwater from entering the frequency converter body even under heavy rain. Furthermore, the arc-shaped plate of the rainproof and dustproof structure, combined with a top plate with heat dissipation holes, ensures daily ventilation. The air-cooled heat dissipation structure improves the heat dissipation efficiency of the frequency converter body, and the detachable dust filter frame provides dust protection and facilitates disassembly and maintenance.

[0004] The following defects were found in the above-mentioned issues: In the existing technology, frequency converters typically emit a large amount of hot air during daily operation. If heat dissipation is not carried out in time, the electronic components of the frequency converter will be damaged by high temperature. At the same time, if the frequency converter is left idle for a long time, dust will enter the inside of the frequency converter and contaminate the electronic components. Although some existing frequency converters have built-in heat dissipation holes, relying solely on self-cooling is far from meeting the heat dissipation requirements, which will still lead to damage to electronic components, thereby greatly increasing costs and preventing the frequency conversion operation from being completed normally. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing frequency converters, which, although some have built-in heat dissipation holes, cannot meet the heat dissipation requirements by relying solely on their own heat dissipation, and will still cause damage to electronic components, resulting in a significant increase in cost and the inability to complete the frequency conversion work normally. Therefore, this utility model proposes a dustproof heat dissipation structure for frequency converters.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a dustproof and heat dissipation structure for a frequency converter, comprising a housing, a frequency converter component housed inside the housing, a control panel on one side of the frequency converter component, an observation window on one side of the housing, a protective device on the inner wall of the housing, the protective device comprising a partition plate fixedly connected to the inner wall of the housing, a through hole on one side of the partition plate, a support frame fixedly connected to the upper surface of the partition plate, the support frame being cross-shaped, a motor fixedly connected to the upper surface of the support frame, and a rotating rod rotatably connected to the lower surface of the support frame. The output end of the machine is fixedly connected to the rotating rod. The end of the rotating rod away from the support frame is fixedly connected to a rotating shaft. Several fan blades are fixedly connected to the arc surface of the rotating shaft. The fan blades are evenly distributed on the arc surface of the rotating shaft. A rectangular groove is opened on the inner wall of the housing. A rectangular hole is opened on one side of the housing. An outer frame is slidably connected to the inner wall of the rectangular hole. The outer frame is located below the through hole and is slidably connected to the rectangular groove. A silicone mesh is fixedly connected to the inner wall of the outer frame. A dustproof mesh is fixedly connected to the inner wall of the housing. The dustproof mesh is located above the motor. Two rows of vent holes are opened on both sides of the housing.

[0007] The above components achieve the following effects: when the frequency converter is working, it will emit a large amount of heat, which will control the motor to drive the fan blades to rotate, allowing the heat to dissipate through the air vents on both sides of the housing. When the frequency converter is in a relatively humid environment, the moisture in the moisture will be absorbed by the silicone mesh, thus playing a role in moisture prevention. The dustproof mesh located above the motor can block fine dust outside the dustproof mesh, thereby playing a role in dust prevention.

[0008] Preferably, a pull ring is fixedly connected to the side of the outer frame away from the rectangular groove, and the cross-section of the pull ring is U-shaped.

[0009] The above-mentioned components achieve the following effects: the silicone mesh can be pulled out using the pull ring, making it easy to replace the silicone mesh later, and the pull ring makes the operation simpler and more convenient.

[0010] Preferably, the upper surface of the support frame is provided with a circular groove, and a protective cover is slidably connected to the inner wall of the circular groove.

[0011] The effect achieved by the above components is that motors are expensive to manufacture, and the protective cover can protect the motor when it is working.

[0012] Preferably, the upper surface of the protective cover has a plurality of heat dissipation holes, and the plurality of heat dissipation holes are evenly distributed on the upper surface of the protective cover.

[0013] The effect achieved by the above components is that when the motor is working, it will generate heat, and the heat dissipation holes can dissipate the heat through the heat dissipation holes, thus playing a role in cooling the motor.

[0014] Preferably, the inner wall of the box is provided with a cleaning device, which includes two elliptical grooves, two elliptical grooves on one side of the box, and two elliptical holes on the other side of the box. Sliding rods are slidably connected to the inner walls of the two elliptical grooves and the elliptical holes. Four sliding rods are grouped in pairs, with a concave plate fixedly connected to the ends of the two groups of sliding rods closest to each other. A connecting plate is fixedly connected to the inner side of the concave plate, and a cleaning brush is fixedly connected to the lower surface of the connecting plate. A pull plate is fixedly connected to the end of one group of sliding rods away from the elliptical groove. A cleaning hole is provided on one side of the box, with a slanted panel fixedly connected to the inner wall of the cleaning hole. A concave frame is fixedly connected to one side of the box, located outside the cleaning hole. Two support plates are fixedly connected to one side of the box, and a dirt-collecting basket is slidably connected to the upper surface of the two support plates.

[0015] The effect achieved by the above components is that after the dustproof net has been used for dustproofing for a long time, the mesh will become clogged with dust or large particles. At this time, the pull plate can be pulled to drive the cleaning brush to clean the surface of the dustproof net back and forth, making the cleaning and maintenance of the dustproof net more efficient.

[0016] Preferably, a magnetic strip is fixedly connected to one side of the box, and the concave frame is made of iron.

[0017] The effect achieved by the above components is that when the dust filter does not need to be cleaned with a cleaning brush, the concave frame can be attached to the magnetic strip to prevent the cleaning brush from sliding during vibration, and the magnetic strip also serves to fix the cleaning brush in place.

[0018] Preferably, a handle is fixedly connected to the side of the pull plate away from the box body, and the handle is located in the center of the pull plate.

[0019] The effect achieved by the above components is that when it is necessary to pull the lever, the operation can be made more convenient and less strenuous by using the handle to pull the lever.

[0020] In summary, the beneficial effects of this utility model are as follows:

[0021] In this invention, frequency converters typically generate a large amount of heat during operation. If heat dissipation is not implemented while the frequency converter is running, the internal electronic components may be damaged due to high temperatures, significantly increasing costs. By installing a protective device, not only can the frequency converter be cooled, but the incoming air can also be dehumidified during the cooling process, preventing damage to electronic components due to moisture. Additionally, a dust filter can prevent dust contamination of the electronic components. The specific operating steps of the protective device are as follows: While the frequency converter is operating, the motor can be controlled to rotate. The motor rotation drives the lower rotating rod and shaft to rotate together. Several fan blades located on the arc surface of the shaft also rotate with the rotation of the shaft and rod, thereby increasing the airflow velocity inside the frequency converter and achieving a cooling effect. Before air enters the housing from above through the dust filter, it first needs to pass through the dust filter, which blocks dust and particulate matter in the air. The air filtered through the dust filter flows rapidly downwards as it passes through the fan blades. When passing through the silicone mesh located below the through-holes, the silicone material, with its high adsorption capacity, good thermal stability, stable chemical properties, and high mechanical strength, absorbs moisture from the air, thus drying the air and preventing damage to electronic components from excessive humidity. When the silicone mesh needs replacement, the outer frame can be pulled out of the housing by the pull ring to replace it. The protective cover above the motor protects it during operation, while the several ventilation holes above the cover dissipate heat when the motor generates significant heat.

[0022] In this invention, when the dustproof net is in operation, it blocks dust or particulate matter in the air. However, after prolonged dustproofing, the surface of the net inevitably becomes clogged with dust and particulate matter, rendering it ineffective. Cleaning the net requires complex disassembly, reducing maintenance efficiency. By installing a cleaning device, the net can be cleaned without disassembly, significantly increasing maintenance efficiency. The specific operating steps of the cleaning device are as follows: When cleaning is not required, the cleaning brush adheres to the magnetic strip on the housing along with the concave frame. When cleaning is needed, the concave frame can be removed from the magnetic strip. Then, the cleaning brush can be pulled... The handle on the plate moves the concave plate towards the cleaning hole. As the concave plate moves, the slide bar slides in the same direction along the inner wall of the elliptical hole and elliptical groove. As the concave frame moves, it also moves the connecting plate and cleaning brush located below the concave frame towards the cleaning hole, causing the cleaning brush to scrape against the surface of the dust screen. The dust and particles cleaned from the surface of the dust screen are pushed towards the cleaning hole. When the impurities reach the cleaning hole, they fall into the sludge collection basket located below the cleaning hole due to the inclined plate. When the sludge collection basket is almost full, it can be removed from the two support plates, and the impurities can be poured into the designated area. Using the handle to pull the pull plate to move the concave frame makes the operation simpler and less strenuous. The magnetic strip on the box serves to fix the cleaning brush. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the protective device of this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the protective device of this utility model;

[0026] Figure 4 This is a partial structural schematic diagram of the protective device of this utility model;

[0027] Figure 5 This is a three-dimensional structural diagram of the cleaning device of this utility model;

[0028] Figure 6 This is a partial structural schematic diagram of the cleaning device of this utility model.

[0029] Legend: 1. Housing; 2. Observation window; 3. Frequency converter; 4. Control panel; 5. Protective device; 501. Partition; 502. Through hole; 503. Support frame; 504. Motor; 505. Rotating rod; 506. Rotating shaft; 507. Fan blade; 508. Rectangular slot; 509. Rectangular hole; 510. Air outlet; 511. Outer frame; 512. Silicone mesh; 513. Pull ring; 514. Circular slot 515. Protective cover; 516. Heat dissipation hole; 517. Dustproof net; 6. Cleaning device; 601. Oval groove; 602. Oval hole; 603. Slide rod; 604. Concave plate; 605. Connecting plate; 606. Magnetic strip; 607. Cleaning brush; 608. Pull plate; 609. Handle; 610. Cleaning hole; 611. Slanted panel; 612. Concave frame; 613. Support plate; 614. Dirt basket. Detailed Implementation

[0030] Reference Figure 1 As shown, this utility model provides a technical solution: a dustproof and heat dissipation structure for a frequency converter, including a housing 1, a frequency converter 3 is provided inside the housing 1, a control panel 4 is provided on one side of the frequency converter 3, an observation window 2 is provided on one side of the housing 1, a protective device 5 is provided on the inner wall of the housing 1, and a cleaning device 6 is provided on the inner wall of the housing 1.

[0031] The specific setup and function of its protective device 5 and cleaning device 6 will be explained below.

[0032] Reference Figure 2 , Figure 3 and Figure 4As shown in this embodiment: the protective device 5 includes a partition 501, which is fixedly connected to the inner wall of the housing 1. A through hole 502 is provided on one side of the partition 501. A support frame 503 is fixedly connected to the upper surface of the partition 501. The support frame 503 is cross-shaped. A motor 504 is fixedly connected to the upper surface of the support frame 503. A rotating rod 505 is rotatably connected to the lower surface of the support frame 503. The output end of the motor 504 is fixedly connected to the rotating rod 505. A rotating shaft 506 is fixedly connected to the end of the rotating rod 505 away from the support frame 503. A circular arc surface of the rotating shaft 506 is fixedly connected to... Several fan blades 507 are evenly distributed on the arc surface of the rotating shaft 506. A rectangular groove 508 is provided on the inner wall of the housing 1. A rectangular hole 509 is provided on one side of the housing 1. An outer frame 511 is slidably connected to the inner wall of the rectangular hole 509. The outer frame 511 is located below the through hole 502. The outer frame 511 is slidably connected to the rectangular groove 508. A silicone mesh 512 is fixedly connected to the inner wall of the outer frame 511. A dustproof mesh 517 is fixedly connected to the inner wall of the housing 1. The dustproof mesh 517 is located above the motor 504. Two rows of vent holes 510 are provided on both sides of the housing 1. When the frequency converter is working, it emits a large amount of heat. The control motor 504 drives the fan blades 507 to rotate, allowing the heat to dissipate through the vents 510 on both sides of the housing 1. When the frequency converter is in a relatively humid environment, the moisture in the air is absorbed by the silicone mesh 512, thus providing a moisture-proof function. The dustproof mesh 517 located above the motor 504 can block fine dust particles, thus providing a dustproof function. A pull ring 513 is fixedly connected to the side of the outer frame 511 away from the rectangular slot 508. The cross-section of the pull ring 513 is "U". The silicone mesh 512 can be pulled out using the pull ring 513, making it easy to replace later. The pull ring 513 makes the operation simpler and more convenient. A circular groove 514 is opened on the upper surface of the support frame 503, and a protective cover 515 is slidably connected to the inner wall of the circular groove 514. The motor 504 is expensive, and the protective cover 515 protects the motor 504 during operation. The upper surface of the protective cover 515 has several heat dissipation holes 516, which are evenly distributed across the upper surface. When the motor 504 is operating, it generates heat, which is dissipated through the heat dissipation holes 516, thus cooling the motor 504.

[0033] Reference Figure 5 and Figure 6As shown, in this embodiment: the cleaning device 6 includes two elliptical grooves 601, which are formed on one side of the housing 1. Two elliptical holes 602 are formed on the other side of the housing 1. Sliding rods 603 are slidably connected to the inner walls of both elliptical grooves 601 and elliptical holes 602. The four sliding rods 603 are arranged in pairs. A concave plate 604 is fixedly connected to the end of each pair of sliding rods 603 that is close to each other. A connecting plate 605 is fixedly connected to the inner side of the concave plate 604. The lower part of the connecting plate 605... A cleaning brush 607 is fixedly connected to the surface. A set of sliding rods 603 has a pull plate 608 fixedly connected to the end away from the elliptical groove 601. A cleaning hole 610 is opened on one side of the box body 1. An inclined plate 611 is fixedly connected to the inner wall of the cleaning hole 610. A concave frame 612 is fixedly connected to one side of the box body 1, located outside the cleaning hole 610. Two support plates 613 are fixedly connected to one side of the box body 1, and a dirt-collecting basket 614 is slidably connected to the upper surface of the two support plates 613. After the dustproof net 517 has been used for dustproofing for a long time, the mesh may become clogged with dust or large particles. At this time, the pull plate 608 can be pulled to drive the cleaning brush 607 to clean the surface of the dustproof net 517 back and forth, making the cleaning and maintenance efficiency of the dustproof net 517 higher. A magnetic strip 606 is fixedly connected to one side of the box body 1, and the concave frame 612 is made of iron. When cleaning the dust filter 517 is not required using the cleaning brush 607, the concave frame 612 can be attached to the magnetic strip 606 to prevent the cleaning brush 607 from sliding during vibration. The magnetic strip 606 also serves to fix the cleaning brush 607 in place. A handle 609 is fixedly connected to the side of the pull plate 608 away from the housing 1, and the handle 609 is located in the center of the pull plate 608. When it is necessary to pull the pull plate 608, the handle 609 can be used to pull the pull plate 608, making the operation more convenient and effortless.

[0034] Working principle: In this utility model, when the frequency converter is working, it usually emits a lot of heat. If the frequency converter is not cooled while it is working, the internal electronic components of the frequency converter may be damaged due to high temperature, which greatly increases the cost. By setting up the protective device 5, not only can the frequency converter be cooled, but the incoming air can also be dehumidified during the cooling process to prevent the electronic components from being damaged by moisture. In addition, the dustproof net 517 can also prevent dust from contaminating the electronic components. The specific operation steps of the protective device 5 are as follows: When the frequency converter is working, the motor 504 can be controlled to rotate. The rotation of the motor 504 will drive the lower rotating rod 505 and the rotating shaft 506 to rotate together. Several fan blades 507 located on the arc surface of the rotating shaft 506 will also rotate with the rotation of the rotating shaft 506 and the rotating rod 505, thereby increasing the airflow speed inside the frequency converter and achieving the cooling effect. Before air enters the housing 1 from above through the dust filter 517, it first passes through the dust filter 517, which blocks dust and particulate matter in the air. The air filtered through the dust filter 517 flows rapidly downwards as it passes the fan blades 507. When it passes through the silicone mesh 512 located below the through-hole 502, the silicone material, with its high adsorption capacity, good thermal stability, stable chemical properties, and high mechanical strength, absorbs moisture from the air, thus drying the air and preventing damage to electronic components from excessive humidity. When the silicone mesh needs to be replaced, the outer frame 511 can be pulled out of the housing 1 by pulling the pull ring 513 to replace the silicone mesh 512. The protective cover 515 located above the motor 504 is designed to cover the motor 504 when it is working, thereby protecting the motor 504. The several heat dissipation holes 516 located above the protective cover 515 are designed to dissipate heat when the motor 504 generates a lot of heat during operation.

[0035] In this invention, when the dustproof net 517 is performing its dustproof function, it blocks dust or particulate matter in the air. However, after prolonged dustproofing, the surface of the dustproof net 517 inevitably becomes clogged with dust and particulate matter, rendering it ineffective. Cleaning the dustproof net 517 requires complex disassembly, reducing maintenance efficiency. By incorporating the cleaning device 6, cleaning can be performed without needing to clean the dustproof net 517. 7. Disassembly allows for cleaning of the dust filter 517, significantly increasing the efficiency of dust filter 517 maintenance. The specific operating steps of the cleaning device 6 are as follows: When cleaning of the dust filter 517 is not required, the cleaning brush 607 will adhere to the magnetic strip 606 located on the housing 1 along with the concave frame 612. When cleaning of the dust filter 517 is required, the concave frame 612 can be removed from the magnetic strip 606. Then, the concave plate 60 can be moved by pulling the handle 609 located on the pull plate 608. 4. Moving towards the cleaning hole 610, while the concave plate 604 moves, the slide bar 603 also slides in the same direction along the inner wall of the elliptical hole 602 and the elliptical groove 601. As the concave frame 612 moves, it also carries the connecting plate 605 and the cleaning brush 607 located below the concave frame 612 towards the cleaning hole 610, causing the cleaning brush 607 to scrape against the surface of the dustproof net 517. The dust and particles cleaned from the surface of the dustproof net 517 are pushed towards the cleaning hole 610. When the impurities reach the cleaning hole 610, they will fall down the lower panel due to the inclined panel 611 into the sludge basket 614 located below the cleaning hole 610. When the sludge basket 614 is almost full, the sludge basket 614 can be removed from the two support plates 613, and the impurities can be poured into the designated area. The operation can be made simpler and less strenuous by using the handle 609 to pull the pull plate 608 to move the concave frame 612. The magnetic strip 606 on the box 1 serves to fix the cleaning brush 607.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection within a component, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A dustproof and heat dissipation structure for a frequency converter, characterized in that: The enclosure includes a housing (1), inside which is a frequency converter (3), a control panel (4) on one side of the frequency converter (3), an observation window (2) on one side of the housing (1), and a protective device (5) on the inner wall of the housing (1). The protective device (5) includes a partition (501), which is fixedly connected to the inner wall of the housing (1). A through hole (502) is opened on one side of the partition (501). A support frame (503) is fixedly connected to the upper surface of the partition (501). The support frame (503) is cross-shaped. A motor (504) is fixedly connected to the upper surface of the support frame (503). A rotating rod (505) is rotatably connected to the lower surface of the support frame (503). The output end of the motor (504) is fixedly connected to the rotating rod (505). The rotating rod (505) is located away from the support frame. One end of the housing (503) is fixedly connected to a rotating shaft (506), and a plurality of fan blades (507) are fixedly connected to the arc surface of the rotating shaft (506). The plurality of fan blades (507) are evenly distributed on the arc surface of the rotating shaft (506). A rectangular groove (508) is provided on the inner wall of the housing (1), and a rectangular hole (509) is provided on one side of the housing (1). An outer frame (51) is slidably connected to the inner wall of the rectangular hole (509). 1) The outer frame (511) is located below the through hole (502). The outer frame (511) is slidably connected to the rectangular groove (508). A silicone mesh (512) is fixedly connected to the inner wall of the outer frame (511). A dustproof mesh (517) is fixedly connected to the inner wall of the box (1). The dustproof mesh (517) is located above the motor (504). Two rows of vent holes (510) are opened on both sides of the box (1).

2. The dustproof and heat dissipation structure for a frequency converter according to claim 1, characterized in that: A pull ring (513) is fixedly connected to the side of the outer frame (511) away from the rectangular groove (508), and the cross-section of the pull ring (513) is "U" shaped.

3. The dustproof and heat dissipation structure for a frequency converter according to claim 1, characterized in that: The upper surface of the support frame (503) is provided with a circular groove (514), and a protective cover (515) is slidably connected to the inner wall of the circular groove (514).

4. The dustproof and heat dissipation structure for a frequency converter according to claim 3, characterized in that: The upper surface of the protective cover (515) is provided with a plurality of heat dissipation holes (516), and the plurality of heat dissipation holes (516) are evenly distributed on the upper surface of the protective cover (515).

5. The dustproof and heat dissipation structure for a frequency converter according to claim 1, characterized in that: The inner wall of the box (1) is provided with a cleaning device (6). The cleaning device (6) includes two elliptical grooves (601). The two elliptical grooves (601) are opened on one side of the box (1). Two elliptical holes (602) are opened on the other side of the box (1). The inner walls of the two elliptical grooves (601) and the elliptical holes (602) are slidably connected with slide rods (603). The four slide rods (603) are in pairs. The ends of the two pairs of slide rods (603) that are close to each other are fixedly connected with concave plates (604). The inner side of the concave plates (604) is fixedly connected with connecting plates (605). A cleaning brush (607) is fixedly connected to the lower surface of the box (5). A pull plate (608) is fixedly connected to one end of the sliding rod (603) away from the elliptical groove (601). A cleaning hole (610) is opened on one side of the box (1). An inclined plate (611) is fixedly connected to the inner wall of the cleaning hole (610). A concave frame (612) is fixedly connected to one side of the box (1). The concave frame (612) is located outside the cleaning hole (610). Two bearing plates (613) are fixedly connected to one side of the box (1). A sludge basket (614) is slidably connected to the upper surface of the two bearing plates (613).

6. The dustproof and heat dissipation structure for a frequency converter according to claim 5, characterized in that: A magnetic strip (606) is fixedly connected to one side of the box (1), and the concave frame (612) is made of iron.

7. The dustproof and heat dissipation structure for a frequency converter according to claim 5, characterized in that: A handle (609) is fixedly connected to the side of the pull plate (608) away from the box body (1), and the handle (609) is located in the center of the pull plate (608).

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