Frequency converter heat dissipation device for cable production

Abstract

The utility model discloses a frequency converter heat dissipation device for cable production, which comprises a shell (1), a first fan (2) for heat dissipation is arranged at the lower end of the shell (1), the air supply direction of the first fan (2) is vertically upward, the first fan (2) is electrically connected to a single-chip microcomputer connecting terminal (3), and the single-chip microcomputer connecting terminal (3) is electrically connected to the shell (1). The single-chip microcomputer connecting terminal (3) is used for controlling execution of stop operation of the first fan (2) later than execution of stop operation of the frequency converter. The utility model provides the frequency converter heat radiation device for cable production, which can enhance the heat radiation capability of the frequency converter.

Description

Technical Field

[0001] The utility model relates to the field of cable production equipment, in particular to a frequency converter heat dissipation device for cable production. Background Art

[0002] During the cable production process, the cable core and armor layer steel wires need to be twisted together. In order to meet the automatic twisting production of the cable core and armor layer steel wires, PLC, inverter, servo and other control methods are required.

[0003] Conventional inverters primarily function in automated production to precisely control operating speed, balance starting voltage fluctuations, and protect motors. However, in some conventional automated production lines, the production power is relatively low, resulting in low inverter heat generation and insignificant internal temperature rise. Consequently, conventional inverter cooling systems rely solely on ventilation. However, in cable production, where production power is high and heat is high, conventional inverter ventilation is insufficient to meet these requirements, significantly reducing the lifespan of the inverter's electronic components and, consequently, the inverter's overall lifespan. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a frequency converter heat dissipation device for cable production which enhances the heat dissipation capacity of the frequency converter.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problem is: a frequency converter heat dissipation device for cable production, comprising a shell, a first fan for heat dissipation is provided at the lower end of the shell, the air supply direction of the first fan is vertically upward, the first fan is electrically connected to a single-chip microcomputer connection terminal, and the single-chip microcomputer connection terminal is used to control the stop operation of the first fan to be executed later than the stop operation of the frequency converter.

[0006] Compared with the existing technology, the advantages of the present invention are: by modifying the conventional inverter and adding the design of the first fan, the heat dissipation and ventilation capacity inside the inverter housing can be enhanced. At the same time, through the design of the single-chip microcomputer connection terminal, the working state of the first fan can be controlled during the automatic production process. The control method in which the first fan stops operating later than the inverter stops operating can speed up the cooling efficiency inside the inverter after the inverter stops working, so that the inverter can be restored to room temperature, thereby ensuring the service life of the inverter.

[0007] As an improvement of the present invention, the shell is provided with multiple second fans in the middle section along the height direction, and the air supply direction of the second fans is also vertically upward. The multiple second fans are respectively provided at the four corners of the shell, and the multiple second fans are also electrically connected to the microcontroller connection terminal. Through the improvement, the first fan is used to ensure the overall heat dissipation and cooling of the inverter, but its main action area is in the axial direction, and the cooling of the circumferential area is mainly carried out by air convection formed by temperature difference and pressure difference. When the height of the inverter is higher, the circumferential area is less affected by the first fan, so that the temperature difference and pressure difference between the circumferential area at a high place and the axial area will be significantly reduced, so that the temperature heat dissipation effect of the circumferential area at a high place is significantly reduced, so that the design of multiple second fans can solve the heat dissipation problem of electronic components in the circumferential area at a high place.

[0008] As an improvement of the present invention, the second fan adopts a small fan with an integrated fan blade and drive motor design. Through the improvement, the heat dissipation requirement of the second fan is low, and the heat dissipation demand can be met by using a low-cost small fan. When the second fan is damaged, the second fan can be directly replaced to improve replacement efficiency.

[0009] As an improvement of the present invention, the first fan includes an impeller and an impeller drive motor, the impeller and the impeller drive motor are detachably connected, the blades on the impeller are arc-shaped, and the number of blades is not less than six. Through the improvement, the heat dissipation requirement of the first fan is relatively high, and most fans with an integrated design cannot meet the heat dissipation requirement of the inverter. In addition, the physical parameters of the impeller of the first fan, such as the number and thickness of its blades, are closely related to the air flow rate of the first fan. Therefore, the requirements for the impeller are relatively high, which makes the cost of the impeller relatively high. During the use of the first fan, the impeller drive motor is the most easily damaged between the impeller and the impeller drive motor. Taking into account various factors, the impeller and the impeller drive motor are designed to be detachable. When the first fan fails, only one of the components needs to be replaced, which can greatly reduce the maintenance cost of the first fan.

[0010] As an improvement of the present invention, the bottom end of the shell is provided with a accommodating cavity for accommodating the first fan, the upper end surface of the accommodating cavity is provided with an air outlet, the air outlet end of the impeller is coaxially arranged with the air outlet, and the air outlet end of the impeller is arranged at the same height as the air outlet. Through the improvement, the installation of the first fan is met, and at the same time, the connection design between the air outlet and the impeller can ensure the heat dissipation effectiveness of the air flow formed by the impeller in the inverter.

[0011] As an improvement of the present invention, a protective mesh cover is provided at the air outlet, and the protective mesh cover is made of metal material. Through the improvement, without affecting the gas flowability of the first fan, it can prevent large components inside the inverter from falling off and directly falling into the first fan, causing damage to the large components and the first fan, thereby playing a protective role in use.

[0012] As an improvement of the present invention, a piece of nylon cloth is provided above the air outlet, one end of the nylon cloth is fixedly connected to a winch drum, and the winch drum is fixedly connected to a side wall of the shell. Bent hooks are provided at two corners of the end of the nylon cloth away from the winch drum, and a hook ring is provided on the other side wall of the shell away from the winch drum to fix the unfolded nylon cloth. Through the improvement, the nylon cloth can be unfolded when performing inverter maintenance work, so as to avoid fasteners or small spare parts falling into the first fan when disassembling and installing components, thereby affecting the maintenance efficiency and subsequent usage.

[0013] As an improvement of the present invention, an air inlet window is provided on the side of the accommodating cavity, and an air outlet window is provided on the upper side of the shell. Through the improvement, a one-way air flow channel is formed in the inverter, thereby achieving the purpose of rapid heat dissipation.

[0014] As an improvement of the present invention, the air inlet window and the air outlet window are both provided with dust covers. Through the improvement, dust is prevented from entering the inverter through the air inlet window or the air outlet window. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the rear view structure of the interior of the shell of the utility model.

[0016] Figure 2 This is a schematic diagram of the top view of the distribution structure of the first fan and the second fan of the utility model.

[0017] Figure 3 It is a schematic diagram of the impeller structure of the utility model.

[0018] Figure 4 It is a schematic diagram of the unfolded top view of the nylon cloth of the utility model.

[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of the air outlet window and the dust cover of the utility model.

[0020] Shown in the figure: 1. Shell, 1.1. Accommodating chamber, 1.2. Air outlet, 1.3. Air inlet window, 1.4. Air outlet window, 1.5. Dust cover, 1.6. Rear door, 2. First fan, 2.1. Impeller, 2.2. Impeller drive motor, 3. Microcontroller connection terminal, 4. Second fan, 5. Protective mesh cover, 6. Nylon cloth, 6.1. Bent hook, 7. Winch, 8. Hook ring. DETAILED DESCRIPTION

[0021] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] like Figure 1-2 As shown, a frequency converter heat dissipation device for cable production includes a shell 1, a first fan 2 for heat dissipation is provided at the lower end of the shell 1, the air supply direction of the first fan 2 is vertically upward, and a accommodating chamber 1.1 for accommodating the first fan 2 is provided at the bottom end of the shell 1, an air outlet 1.2 is provided on the upper end surface of the accommodating chamber 1.1, the air outlet end of the first fan 2 is coaxially arranged with the air outlet 1.2, and the air outlet end of the first fan 2 is arranged at the same height as the air outlet 1.2, the first fan 2 is electrically connected to a single-chip microcomputer connection terminal 3, and the single-chip microcomputer connection terminal 3 is used to control the stop operation of the first fan 2 to be executed later than the stop operation of the frequency converter, the shell 1 includes a rear door 1.6, and the rear door 1.6 is also a maintenance door. From the perspective of the rear door 1.6 It can be seen that a variety of components are installed in the shell 1. The shell 1 is provided with multiple second fans 4 along the middle section in the height direction. The air supply direction of the second fans 4 is also vertically upward. Multiple second fans 4 are respectively arranged on the four corners of the shell 1. Multiple second fans 4 are also electrically connected to the single-chip computer connection terminal 3. The second fan 4 adopts a small fan with an integrated design of fan blades and drive motor. The small fan is a conventional equipment. During the installation of the second fan 4, the four corners of the shell 1 will be welded or threaded to fix the connecting bracket to facilitate the installation of the second fan 4. The fixing bracket is a hollow structure for easy ventilation. At the same time, the height of the four second fans 4 can be adjusted according to the space conditions and does not need to be set at the same height, but the ventilation smoothness of the second fan 4 must be guaranteed.

[0023] like Figure 3 As shown, the first fan 2 includes an impeller 2.1 and an impeller drive motor 2.2. The impeller 2.1 is detachably connected to the impeller drive motor 2.2. The blades on the impeller 2.1 are arc-shaped, and there are twelve blades. The air outlet end of the impeller 2.1 is set at the same height as the air outlet 1.2.

[0024] like Figure 2As shown, a protective mesh cover 5 is provided at the air outlet 1.2. The protective mesh cover 5 is made of metal material. The mesh cover is welded with multiple annular steel bars and two bent steel bars to form a convex mesh cover structure. The protective mesh cover is a conventional structure.

[0025] like Figure 1 、 Figure 4 As shown, a piece of nylon cloth 6 is provided above the air outlet 1.2. One end of the nylon cloth 6 is fixedly connected to a hoist drum 7, which is fixedly connected to the front wall of the housing 1. Hooks 6.1 are provided at two corners of the end of the nylon cloth 6 away from the hoist drum 7. Hook rings 8 that mate with the hooks 6.1 are provided on the side walls of the housing 1, located on either side of the rear door 1.6 and away from the hoist drum 7. After the nylon cloth 6 is unfolded, the hooks 6.1 are hooked with the color rings to secure the unfolded nylon cloth 6. This prevents fasteners or small components from falling into the first fan 2 during maintenance of the inverter's internal components. Due to space limitations and the limited size of the standard hoist drum 7 on the market, the width of the nylon cloth 6 is slightly smaller than the internal width of the housing 1. Therefore, an extension line is added to the hooks 6.1 to facilitate hooking and securing the hooks 6.1 with the rings. The hoist drum 7 is of conventional structure, commonly used for rolling screen windows, and can be purchased directly on the market, but its curtain cloth needs to be replaced with nylon cloth 6 to meet the use requirements in the high temperature environment of the inverter.

[0026] like Figure 1 、 Figure 5 As shown, an air inlet window 1.3 is provided on the side of the accommodating cavity 1.1, and an air outlet window 1.4 is provided on the upper side of the shell 1. Both the air inlet window 1.3 and the air outlet window 1.4 are provided with a dust cover 1.5.

[0027] By adding a heat dissipation device to the inverter, the replacement frequency of internal components is reduced during the cable production process, and the periodic single-round production cycle is extended, which not only reduces maintenance costs and maintenance frequency, but also improves production efficiency.

[0028] The above description is merely a description of the preferred embodiment of the present invention and should not be construed as limiting the claims. The present invention is not limited to the above embodiment, and variations in its specific structure are permitted. All variations within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A frequency converter heat sink for cable production, characterized by: The invention comprises a housing (1), wherein a first fan (2) for heat dissipation is provided at the lower end of the housing (1), wherein the air supply direction of the first fan (2) is vertically upward, and the first fan (2) is electrically connected to a single-chip computer connection terminal (3), wherein the single-chip computer connection terminal (3) is used to control the first fan (2) to stop later than the frequency converter.

2. The inverter heat sink for cable production according to claim 1, characterized in that: The housing (1) is provided with a plurality of second fans (4) along the middle section in the height direction. The air supply direction of the second fans (4) is also vertically upward. The plurality of second fans (4) are respectively provided at the four corners of the housing (1). The plurality of second fans (4) are also electrically connected to the single chip computer connection terminal (3).

3. The inverter heat dissipation device for cable production according to claim 2, characterized in that: The second fan (4) is a small fan with an integrated fan blade and a drive motor.

4. The inverter heat sink for cable production according to claim 1, characterized in that: The first fan (2) comprises an impeller (2.1) and an impeller drive motor (2.2); the impeller (2.1) and the impeller drive motor (2.2) are detachably connected; the blades on the impeller (2.1) are arc-shaped, and the number of blades is not less than six.

5. The inverter heat sink for cable production according to claim 4, characterized in that: The bottom end of the housing (1) is provided with a receiving chamber (1.1) for receiving the first fan (2); an air outlet (1.2) is provided on the upper end surface of the receiving chamber (1.1); the air outlet end of the impeller (2.1) is coaxially arranged with the air outlet (1.2), and the air outlet end of the impeller (2.1) is arranged at the same height as the air outlet (1.2).

6. The inverter heat sink for cable production according to claim 5, characterized in that: A protective mesh cover (5) is provided at the air outlet (1.2), and the protective mesh cover (5) is made of metal material.

7. The inverter heat sink for cable production according to claim 5, characterized in that: A piece of nylon cloth (6) is provided above the air outlet (1.2), one end of the nylon cloth (6) is fixedly connected to a hoist drum (7), and the hoist drum (7) is fixedly connected to a side wall of the shell (1). Two corners of the end of the nylon cloth (6) away from the hoist drum (7) are provided with curved hooks (6.1), and the end of the shell (1) away from the hoist drum (7) is provided with a hook ring (8) that matches the curved hook (6.1) to fix the unfolded nylon cloth (6).

8. The inverter heat sink for cable production according to claim 5, characterized in that: An air inlet window (1.3) is provided on the side of the accommodating cavity (1.1), and an air outlet window (1.4) is provided on the upper end side of the shell (1).

9. The inverter heat sink for cable production according to claim 8, characterized in that: The air inlet window (1.3) and the air outlet window (1.4) are both provided with dust covers (1.5).

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