Frequency converter with cooling fan

Abstract

A frequency converter with a cooling fan comprises a shell and a shell cover covering a rear end opening of the shell, and the upper end face and the right side face of the shell are jointly provided with a fan installation area communicated with the rear end opening of the shell. A fan installation frame, a cooling fin installation frame and an iron core installation frame are distributed on the inner side face of the shell cover from top to bottom, the fan installation frame is provided with a frame cover which covers an opening in the upper portion of the fan installation frame and limits a fan in the fan installation frame, and the frame cover is provided with a locking unit which is in a preset shape and can retract after being extruded. The fan mounting frame is provided with a locked unit which allows the locking unit to rebound to a preset shape and is combined with the locking unit. The utility model has the beneficial effects that the locking complexity is simplified through the arrangement of the locking unit and the locked unit, so that the frame cover can be opened or closed without the aid of tools, additional parts such as screws and screws are also not needed, and the frame cover is suitable for quick assembly and convenient assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of soft starters, in particular to a frequency converter with a cooling fan. Background Technique

[0002] A frequency converter is a power control device that applies frequency conversion technology and microelectronics technology to control an AC motor by changing the working power frequency of the motor.

[0003] At present, the cooling fan of the existing frequency converter first uses its own slots to be inserted and matched with the positioning posts arranged on the outer shell to quickly confirm the installation position of the cooling fan on the outer shell. Then, after pre-positioning, the heat dissipation plate is installed at the installation opening of the outer shell, that is, the cooling fan is locked, and the outer shell and the heat dissipation plate are fixedly connected by bolts. Such a disassembly method is relatively cumbersome and requires the assistance of tools to achieve. Content of the Utility Model

[0004] The utility model aims to solve the above-mentioned disadvantages of the prior art and provides a frequency converter with a cooling fan to solve the above problems.

[0005] The technical solution adopted by the utility model to solve its technical problems: This kind of frequency converter with a cooling fan includes an outer shell and a shell cover covering the rear-end opening of the outer shell. The outer shell is provided with a fan installation area communicating with the rear-end opening of the outer shell on its upper end surface and right side surface. On the inner side surface of the shell cover, there are a fan installation frame, a heat dissipation fin installation frame, and an iron core installation frame distributed from top to bottom. The fan installation frame is provided with a frame cover covering its upper opening and limiting the fan within the fan installation frame. The frame cover is provided with a locking unit having a preset shape and retractable under extrusion. The fan installation frame is provided with a locked unit that allows the locking unit to rebound to the preset shape and combine with the locking unit.

[0006] Further improvement: The fan installation frame has an assembly bottom surface. Four assembly corners are formed on the assembly bottom surface through the through ventilation openings. Positioning insertion rods extending upward are provided at the assembly corners. Positioning insertion holes are provided at the four corner positions of the fan, which match the number and position of the positioning insertion rods and allow the positioning insertion rods to be inserted from below. Locking plugs that match the number and position of the positioning insertion holes and are inserted into the positioning insertion holes from above are provided on the bottom surface of the frame cover.

[0007] Further improvement: The locking plug includes four split blocks distributed in an annular array. The outer diameter formed by the split blocks is larger than the inner diameter of the positioning insertion hole, and the contact surface in contact with the inner wall of the positioning insertion hole is an arc surface.

[0008] Further improvement: A circle of insertion strips is provided on the bottom surface of the frame cover and inserted into the reserved spacing formed between the fan and the fan installation frame when the fan is placed in the fan installation frame.

[0009] Further improvement is made such that the locked unit includes an extension bracket formed on the fan mounting frame and at least one locking node formed on the extension bracket. When the frame cover is closed within the fan mounting frame, the locking unit is placed within the extension bracket and combined with the locking node.

[0010] Further improvement is made such that the locking node includes an enclosing wall formed on the extension bracket and a resilient space defined within the enclosing wall and allowing the locking unit to rebound to a preset shape. The enclosing wall abuts against the locking unit in a direction opposite to the locking direction.

[0011] Further improvement is made such that the locking unit includes a connecting bracket formed on one side of the frame cover, a swing plate disposed within the connecting bracket and having elasticity, and at least one locking insert disposed on the swing plate. The connecting bracket has an unlocking gap allowing the swing plate to swing towards the unlocking direction. A hook plate perpendicular to the swing plate is provided at the upper end of the swing plate. When the locking unit is locked to the locked unit, the hook plate is hooked on the extension bracket, and the locking insert is combined with the locking node.

[0012] Further improvement is made such that the fan mounting frame has an assembly side surface opposite to the extension bracket. At least one positioning groove is provided on the assembly side surface, and a hook provided on the frame cover is matched with the position and quantity of the positioning groove and hooked within the positioning groove.

[0013] The beneficial effect of the present utility model is:

[0014] By providing the locking unit and the locked unit, the present utility model simplifies the cumbersome locking of the frame cover and the fan mounting frame, so that neither tools nor additional parts such as screws are required when opening or closing the frame cover, which is suitable for quick and convenient assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is an exploded structural diagram of the front of the present utility model, in which the outer shell is hidden;

[0017] Figure 3 is an exploded diagram of the back of the present utility model, in which the outer shell and the fan are hidden;

[0018] Figure 4 is the present utility model Figure 3 a partial enlarged schematic diagram of part A therein;

[0019] Figure 5 is a schematic structural diagram of the frame cover of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below in conjunction with the drawings:

[0021] Referring to the attached drawings: This frequency converter with a cooling fan includes a housing 1 and a housing cover 2 covering the rear opening of the housing 1. The housing 1 is provided with a total of fan installation areas 11 communicating with the rear opening of the housing 1 on its upper end face and right side face. On the inner side surface of the housing cover 2, there are arranged a fan installation frame 21, a heat dissipation fin installation frame 22, and an iron core installation frame 23 distributed from top to bottom. The fan installation frame 21 is provided with a frame cover 4 covering its upper opening and limiting the fan 3 within the fan installation frame 21. The frame cover 4 is provided with a locking unit 5 having a preset shape and capable of retracting under extrusion. The fan installation frame 21 is provided with a locked unit 6 allowing the locking unit 5 to rebound to the preset shape and engage with the locking unit 5. The principle of the present utility model is that the fan installation frame 21 is used to arrange the fan 3, the heat dissipation fin installation frame 22 is used to arrange the heat dissipation fins, and the iron core installation frame 23 is used to arrange the iron core, and the three are distributed in sequence from top to bottom. In this way, the working heat generated by the iron core can be quickly transferred to the heat dissipation fins under the action of the fan 3, and then the heat dissipation to the outside is also accelerated under the action of the fan 3, thereby ensuring a good heat dissipation effect. Considering that the fan 3 needs to be maintained regularly (i.e., cleaning dust and debris, lubricating bearings, etc.), this method can facilitate the disassembly and installation of the fan 3. That is, after the fan 3 is arranged in the fan installation frame 21, the frame cover 4 limits the fan 3 within the fan installation frame 21. The locking cooperation between the frame cover 4 and the fan installation frame 21 is realized through the locking unit 5 and the locked unit 6. The locking unit 5 has elasticity and can change its preset shape by using the elasticity to release the locking cooperation with the locked unit 6. In this way, when opening or closing the frame cover 4, no tools are needed, nor additional parts such as screws and bolts, which is suitable for rapid and convenient assembly.

[0022] The fan installation frame 21 has an assembly bottom surface 21-a. Four assembly corners 21-a2 are formed on the assembly bottom surface 21-a through the vent holes 21-a1 arranged therethrough. On each of the assembly corners 21-a2, there is arranged a positioning insertion rod 21-a21 extending upward. At the four corner positions of the fan 3, there are provided positioning insertion holes 31 matching the number and position of the positioning insertion rods 21-a21 and for the positioning insertion rods 21-a21 to be inserted from below. On the bottom surface of the frame cover 4, there are provided locking plugs 41 matching the number and position of the positioning insertion holes 31 and inserted into the positioning insertion holes 31 from above. Such a setting can quickly determine the final assembly position of the fan 3 within the fan installation frame 21 and prevent displacement after assembly, so that the fan 3 always remains at the vent hole 21-a1. The frame cover 4 further limits the fan 3 by using the locking plugs 41, that is, restricts the upper end of the fan 3, and the bottom surface of the frame cover 4 is in contact with the top surface of the fan 3. In this way, the frame cover 4 can bring a downward pressing force to the fan 3, increasing the structural stability of the fan 3 during use.

[0023] The locking plug 41 includes four split blocks 41-a distributed in an annular array. The outer diameter formed by the split blocks 41-a is greater than the inner diameter of the positioning jack 31, and the contact surface in contact with the inner wall of the positioning jack 31 is an arc surface. Such a setting.

[0024] On the bottom surface of the frame cover 4, there is a circle of insertion strips 42 inserted into the reserved space formed between the fan 3 and the fan installation frame 21 when the fan 3 is placed in the fan installation frame 21. That is, in this way, a binding force is brought to the periphery of the fan 3, so as to further increase the installation stability of the fan 3 in the fan installation frame 21 and eliminate the stress generated when the fan 3 is in use.

[0025] The locked unit 6 includes an extension frame 61 formed on the fan installation frame 21 and at least one locking node 62 formed on the extension frame 61. When the frame cover 4 is closed in the fan installation frame 21, the locking unit 5 is placed in the extension frame 61 and combined with the locking node 62. The extension frame 61 is an extended part of the fan installation frame 21, which increases the lateral width of the fan installation frame 21, so that the peripheral distances between the inner wall of the fan installation frame 21 and the outer wall of the fan 3 are all maintained at an equal distance, so as not to interfere with the insertion of the insertion strip 42. The locking node 62 is the main part that locks and cooperates with the locking unit 5. When the two are combined, a locking effect that prevents the frame cover 4 from detaching from the fan installation frame 21 is generated.

[0026] The locking node 62 includes an enclosing wall 62-a formed on the extension frame 61 and a rebound space 62-b defined within the enclosing wall 62-a and allowing the locking unit 5 to rebound to a preset shape. The enclosing wall 62-a abuts against the locking unit 5 in the direction opposite to the locking direction. When the locking unit 5 reaches the rebound space 62-b of the locking node 62, the locking unit 5 is released from the bound state of being subjected to the user's force, that is, it returns to the preset shape under its rebound performance. The enclosing wall 62-a plays a blocking role on the locking unit 5 that has returned to the preset shape, thereby preventing the locking unit 5 from returning along the original path and completing the locking state of the frame cover 4 and the fan installation frame 21. In this embodiment, the locking node 62 is shown as a through hole penetrating the extension frame 61. The hole wall of the through hole forms the enclosing wall 62-a, and the space allowing the locking unit 5 to pass through the through hole forms the rebound space 62-b.

[0027] The locking unit 5 includes a connecting bracket 51 formed on one side of the frame cover 4, a swing plate 52 disposed within the connecting bracket 51 and having elasticity, and at least one locking insert 53 disposed on the swing plate 52. The connecting bracket 51 has an unlocking gap 51-a that allows the swing plate 52 to swing in the unlocking direction. The upper end of the swing plate 52 is provided with a hook plate 52-a that is vertically disposed thereon. When the locking unit 5 is locked to the unit to be locked 6, the hook plate 52-a is hooked on the extension bracket 61. The locking insert 53 is combined with the locking node 62. The connecting bracket 51 is also an extended portion of the fan mounting frame 21 for matching the position of the extension bracket 61. It is composed of two connecting outer ears and a connecting rod that simultaneously connects the two connecting outer ears, so as to obtain the unlocking gap 51-a that allows the swing plate 52 to swing in the unlocking direction. The swing plate 52 is disposed on the connecting rod, and its lateral width is smaller than the lateral width of the swing plate 51, so that the swing plate 52 has elasticity in this way. The hook plate 52-a is an extended portion of the swing plate 52, which is used as an operating portion for driving the swing plate 52 to swing and can be hooked on the extension bracket 61 after locking cooperation, thus facilitating user operation. The locking insert 53 is the main part that is locked and cooperated with the locking node 62, and when the two are combined, a locking effect that prevents the frame cover 4 from detaching from the fan mounting frame 21 is generated.

[0028] The fan mounting frame 21 has an assembly side surface 21-b that is disposed opposite to the extension bracket 61. At least one positioning groove 21-b1 is provided on the assembly side surface 21-b. On the frame cover 4, there are hooks 43 that are matched with the positioning groove 21-b1 in terms of position and quantity and are hooked within the positioning groove 21-b1. That is, the positioning groove 21-b1 and the hooks 43 are used to quickly define the assembly position of the frame cover 4 on the fan mounting frame 21, and the positioning groove 21-b1 and the hooks 43 can also achieve a locking effect, so that there are two constraint points for the frame cover 4 on the fan mounting frame 21, and these two constraint points are symmetrically distributed on both sides, so that when the frame cover 4 is closed on the fan mounting frame 21, the locking effect on one side will not be affected by the lack of constraint effect on the other side.

[0029] Although the present utility model has been illustrated and described by referring to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details may be made within the scope of the claims.

Claims

1. An inverter with a cooling fan, comprising a housing (1), and a housing cover (2) covering a rear end opening of the housing (1), characterized in that: The housing (1) is provided with a fan installation area (11) on its upper end face and right side face, which is communicated with the rear end opening of the housing (1); the inner side face of the housing cover (2) is provided with a fan installation frame (21), a heat dissipation fin installation frame (22), and an iron core installation frame (23) which are arranged from top to bottom; the fan installation frame (21) is provided with a frame cover (4) which covers the upper opening thereof and confines the fan (3) within the fan installation frame (21); the frame cover (4) is provided with a locking unit (5) having a preset shape and being retractable when squeezed; and the fan installation frame (21) is provided with a locked unit (6) which allows the locking unit (5) to rebound to a preset shape and is combined with the locking unit (5).

2. The frequency converter with a heat dissipation fan according to claim 1, characterized in that: The fan installation frame (21) has an assembly bottom surface (21-a), and four assembly corners (21-a2) are formed on the assembly bottom surface (21-a) by ventilation holes (21-a1) that are arranged through the assembly bottom surface (21-a), and each of the assembly corners (21-a2) is provided with a positioning rod (21-a21) that extends upwards, and positioning holes (31) that match the number and position of the positioning rods (21-a21) and are for the positioning rods (21-a21) to be inserted from below are provided at the four corner positions of the fan (3), and locking plugs (41) that match the number and position of the positioning holes (31) and are inserted into the positioning holes (31) from above are provided on the bottom surface of the frame cover (4).

3. The frequency converter with a heat dissipation fan according to claim 2, characterized in that: The locking plug (41) comprises four split blocks (41-a) distributed in a ring array, the outer diameter of the split blocks (41-a) being larger than the inner diameter of the positioning socket (31), and the contact surface with the inner wall of the positioning socket (31) being an arc surface.

4. The frequency converter with a heat dissipation fan according to claim 3, characterized in that: A circle of insert strips (42) is provided on the bottom surface of the frame cover (4) and is inserted into a reserved spacing formed between the fan (3) and the fan installation frame (21) when the fan (3) is placed in the fan installation frame (21).

5. The frequency converter with a heat dissipation fan according to claim 1, characterized in that: The locked unit (6) comprises an extension frame (61) formed on the fan installation frame (21), and at least one locking node (62) formed on the extension frame (61); when the frame cover (4) is covered in the fan installation frame (21), the locking unit (5) is placed in the extension frame (61) and combined with the locking node (62).

6. The frequency converter with a heat dissipation fan according to claim 5, characterized in that: The locking node (62) comprises an enclosing wall (62-a) formed on the extension frame (61), and a rebound space (62-b) defined within the enclosing wall (62-a) and allowing the locking unit (5) to rebound to a preset shape, the enclosing wall (62-a) abutting against the locking unit (5) in a direction opposite to the locking direction.

7. The frequency converter with a heat dissipation fan according to claim 6, characterized in that: The locking unit (5) comprises a connecting frame (51) formed on one side of the frame cover (4), a swing plate (52) arranged in the connecting frame (51) and having elasticity, and at least one locking plug (53) arranged on the swing plate (52); the connecting frame (51) has an unlocking gap (51-a) for allowing the swing plate (52) to swing in an unlocking direction; a hook plate (52-a) arranged perpendicularly thereto is arranged at the upper end of the swing plate (52); the hook plate (52-a) is hooked on the extension frame (61) when the locking unit (5) is locked to the locked unit (6); and the locking plug (53) is combined with the locking node (62).

8. The frequency converter with a heat dissipation fan according to claim 7, characterized in that: The fan installation frame (21) has an assembly side surface (21-b) arranged opposite to the extension frame (61), and at least one positioning groove (21-b1) is arranged on the assembly side surface (21-b), and the frame cover (4) is provided with a hook (43) matching the position and number of the positioning groove (21-b1) and hooked in the positioning groove (21-b1).

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