Energy-saving control cabinet for frequency conversion fan

Abstract

The utility model relates to the technical field of frequency conversion control cabinets, in particular to an energy-saving control cabinet for a frequency conversion fan. Comprising a cabinet body, a heat dissipation grid and a heat dissipation fan are arranged at the upper end of the cabinet body, air inlet grids are arranged on the two sides of the cabinet body, filter boxes are embedded in the air inlet grids, a plurality of arc-shaped plates bent towards the lower portion of the middle of the cabinet body are vertically arranged at the positions, located on the air inlet grids, of the two sides in the cabinet body at intervals, and the arc-shaped plates on the two sides are symmetrically arranged. During use, cold air on two sides impacts on the arc-shaped plate and is guided by the curved surface of the arc-shaped plate to form backflow, and the backflow rises along the side of the cabinet body. Air flows back and circulates, the air flow direction in the cabinet body is changed, the contact time and the contact area of cold air and electrical equipment can be expanded, and therefore the cooling effect is improved. Cold air is filtered by the filter box before entering the cabinet body, so that dust and moisture are removed, and heat dissipation is prevented from being affected by dust on the surface of an electrical element; and potential safety hazards caused by contact between moisture and electrical elements are also avoided.

Description

Technical Field

[0001] This application relates to the field of frequency converter control cabinet technology, and in particular to an energy-saving control cabinet for frequency converter fans. Background Technology

[0002] A variable frequency fan is a type of fan that uses a frequency converter to change the current from AC to DC to AC, thereby controlling the fan speed. This replaces the original blade current-carrying regulation method, ensuring that the fan is always in a scientific and economical operating state and achieving a relative energy-saving effect.

[0003] The variable frequency fan energy-saving control cabinet is a variable frequency control cabinet used to control the variable frequency fan inverter. It consists of an internal inverter and an external control, protection, display and other electrical components and cabinet. It is an AC drive device and energy-saving device that performs variable frequency speed regulation control on the three-phase AC motor of the fan.

[0004] Traditional control cabinets employ a closed structure, while frequency converters typically have an efficiency of 97%-98%, with approximately 2% of their electrical energy being converted into heat energy—far exceeding the heat generated by typical switches, AC contactors, and other electrical components. Furthermore, the failure rate of frequency converters increases with rising temperatures, and their lifespan decreases accordingly. Therefore, control cabinets require excellent ventilation.

[0005] Traditional control cabinet ventilation mostly involves installing heat dissipation grilles on the sides of the cabinet for self-heating, which has poor heat dissipation effect; or forming a forced ventilation loop through a fan, which can easily produce direct ventilation and blow dust or moisture directly onto electrical components, creating safety hazards.

[0006] Therefore, this application provides an energy-saving control cabinet for variable frequency fans, which, while ensuring good ventilation and heat dissipation, avoids the flow of air carrying dust or moisture, thus preventing it from affecting the safety of equipment operation. Utility Model Content

[0007] The purpose of this application is to address the problems existing in the prior art by proposing an energy-saving control cabinet for variable frequency fans.

[0008] To achieve the above objectives, this application adopts the following technical solution:

[0009] An energy-saving control cabinet for a variable frequency fan includes a cabinet body. The upper end of the cabinet body is provided with a heat dissipation grille and a heat dissipation fan. Both sides of the cabinet body are provided with air inlet grilles, and filter boxes are embedded in the air inlet grilles. Inside the cabinet body, both sides are provided with multiple arc-shaped plates that curve downwards toward the middle of the cabinet body at vertical intervals at the air inlet grilles. The arc-shaped plates on both sides are symmetrically arranged.

[0010] Preferably, the upper end of the cabinet is equipped with a heat dissipation channel, and both sides of the cabinet are equipped with air inlet channels. The heat dissipation grille and heat dissipation fan are set in the heat dissipation channel, and the air inlet grille and arc plate are set in the air inlet channel.

[0011] Preferably, the arc-shaped plate is divided into multiple sections, and each section of the arc-shaped plate is detachably connected.

[0012] Preferably, the air inlet channel has an upper opening groove on the side of the grille facing the inside of the cabinet, and the filter box is embedded in the groove.

[0013] Preferably, the groove has a notch at the upper end of the side facing away from the cabinet.

[0014] Preferably, the filter box is an activated carbon box wrapped in non-woven fabric.

[0015] Preferably, a cooling fan is provided inside the cabinet at the IGBT module location.

[0016] Compared with the prior art, this application provides an energy-saving control cabinet for variable frequency fans, which has the following advantages:

[0017] 1. During use, the cold air from both sides impacts the curved plate and is guided by the curved surface of the plate, forming a backflow and rising along the sides of the cabinet. This gas backflow circulation changes the airflow direction inside the cabinet, which can increase the contact time and contact area between the cold air and the electrical equipment, thereby improving the cooling effect.

[0018] 2. Before entering the cabinet, cold air is filtered by the filter box to remove dust and moisture, thus preventing dust from accumulating on the surface of electrical components and affecting heat dissipation; it also prevents moisture from coming into contact with electrical components and posing a safety hazard.

[0019] Other advantages, objectives and features of this application will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this application. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of this application.

[0021] Figure 2 This is a cross-sectional view of this application.

[0022] Figure 3 This is a cross-sectional view of the curved plate and a diagram showing the connection structure between the two curved plates in this application.

[0023] Figure 4 This is a schematic diagram of wind direction flow when the curved plate of this application bends downwards.

[0024] Figure 5 This is a schematic diagram of wind direction flow when the curved plate of this application bends upwards.

[0025] Figure 6 This is a schematic diagram and cross-sectional view of the air inlet channel mechanism of this application.

[0026] Figure 7 For the purposes of this application Figure 6 A partial schematic diagram of point A.

[0027] In the diagram: 1. Cabinet; 2. Ventilation grille; 3. Air intake grille; 4. Cooling fan; 5. Curved plate; 6. Insert rod; 7. Limiting hole; 8. Countersunk bolt; 9. Ventilation channel; 10. Air intake channel; 11. Groove; 12. Limiting ring; 13. Notch. Detailed Implementation

[0028] The following will refer to the appendices in the embodiments of this application. Figure 1-7 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0029] Example 1: In order to solve the problems existing in the prior art, this example provides an energy-saving control cabinet for variable frequency fans, including a cabinet body 1. The upper end of the cabinet body 1 is provided with a heat dissipation grille 2 and a heat dissipation fan 4. Both sides of the cabinet body 1 are provided with air inlet grilles 3. Filter boxes are embedded in the air inlet grilles 3. Inside the cabinet body 1, both sides are provided with multiple arc-shaped plates 5 that are vertically spaced at the air inlet grilles 3 and curve towards the lower middle part of the cabinet body 1. The arc-shaped plates 5 on both sides are symmetrically arranged.

[0030] Principle details of this embodiment:

[0031] An energy-saving control cabinet for a variable frequency fan includes a cabinet body 1. A heat dissipation grille 2 is provided at the upper end of the cabinet body 1, and multiple cooling fans 4 are arranged in a matrix below the grille 2 to draw hot air outwards. Air inlet grilles 3 are provided on both sides of the cabinet body 1, allowing cold air to enter inwards. Filter boxes are embedded in the air inlet grilles 3 to filter dust and moisture from the cold air. Inside the cabinet body 1, on both sides at the air inlet grilles 3, multiple vertically spaced arc-shaped plates 5 are arranged, curving towards the lower center of the cabinet body 1, with the arc-shaped plates 5 symmetrically arranged on both sides.

[0032] Based on the above technical solution:

[0033] During operation, multiple cooling fans 4 start simultaneously, continuously drawing hot air out of the cabinet 1. Hot air is exhausted while cool air enters the cabinet 1 through the air intake grille 3. As the cool air rushes in, it first impacts the curved plate 5 and is guided by the curved surface of the plate 5. (See attached diagram.) Figure 4As shown, the cold air on both sides flows into the middle of the cabinet 1 along the arc plate 5 and then dissipates to both sides, forming a backflow, and rises along the side of the cabinet 1, and finally is discharged from the heat dissipation grille 2.

[0034] By recirculating the gas and altering the airflow direction within cabinet 1, the contact time and area between the cold air and the electrical equipment can be increased, thereby improving the cooling effect.

[0035] Before entering the cabinet, the cold air is filtered by the filter box to remove dust and moisture, thus preventing dust from accumulating on the surface of electrical components and affecting heat dissipation; it also prevents moisture from coming into contact with electrical components and posing a safety hazard.

[0036] The presence of the heat dissipation grille 2 and the air intake grille 3 not only provides a channel for air circulation, but also, through the grille structure, prevents most of the larger debris from entering the cabinet 1.

[0037] In this embodiment, another state of the arc-shaped plate 5 is provided: the arc-shaped plate 5 bends upward toward the middle of the cabinet 1.

[0038] See attached document Figure 5 As shown, cold air enters the cabinet 1 and flows along the upward-curving arc plate 5, thereby accelerating the upward flow and outward discharge of air, which can carry away the hot air more quickly and improve the heat dissipation effect.

[0039] When the curved plate 5 bends upward, ventilation openings are provided on both sides of the lower end of the solid, so that the electrical equipment on the lower layer can also come into contact with cold air and be cooled down.

[0040] In a further embodiment of this solution, the upper end of the cabinet 1 is fitted with a heat dissipation channel 9, and both sides of the cabinet 1 are fitted with air inlet channels 10. The heat dissipation grille 2 and the heat dissipation fan 4 are arranged in the heat dissipation channel 9, and the air inlet grille 3 and the arc plate 5 are arranged in the air inlet channel 10.

[0041] Principle details of this embodiment:

[0042] The cabinet 1 has openings cut at its top and on both sides. A heat dissipation channel 9 is installed at the top opening of the cabinet 1 using fasteners. A heat dissipation grille 2 is embedded at the port of the heat dissipation channel 9, and multiple cooling fans 4 are installed in a matrix within the heat dissipation channel 9. Air inlet channels 10 are installed at the openings on both sides of the cabinet 1 using fasteners. Air inlet grilles 3 are embedded at the port of the air inlet channel, and curved plates 5 are vertically fixed at intervals within the air inlet channel 10.

[0043] The two air inlet channels 10 expand the installation space of the arc plate 5 and also increase the adaptability of the size of the arc plate 5. With the larger size of the arc plate 5, the cold air is guided higher and the gas circulation is more stable.

[0044] In Example 3, a further embodiment of this solution, the arc-shaped plate 5 is divided into multiple sections, and each section of the arc-shaped plate 5 is detachably connected.

[0045] Principle details of this embodiment:

[0046] See attached document Figure 3 As shown, the arc-shaped plate 5 is divided into multiple sections. Each section of the arc-shaped plate 5 has a slot at one end facing the inside of the cabinet 1 and a rod 6 at the other end. The end face of the rod 6 has a limiting hole 7, while the end face of the slot has a countersunk groove corresponding to the limiting hole 7. The countersunk groove has a threaded hole at its center, and a countersunk bolt 8 is screwed into the countersunk groove. The lower end of the countersunk bolt 8 is inserted into the limiting hole 7, thereby realizing the connection between the two sections of the arc-shaped plate 5.

[0047] The segmented design of the curved panel 5 allows it to adapt to changes in the size of the cabinet 1 and the installation gaps for the distribution of electrical components within the cabinet 1, thus improving its flexibility of use.

[0048] In a further embodiment of this solution, in Example 4, the air inlet channel 10 has an upper opening groove 11 on the side of the grille facing the inside of the cabinet 1, and the filter box is embedded in the groove 11.

[0049] Principle details of this embodiment:

[0050] See attached document Figure 6 and attached Figure 7 As shown, the upper end of the air inlet channel 10, away from the cabinet 1, has a notch, and the side of the notch facing the cabinet 1 has a U-shaped limiting ring 12. The limiting ring 12 cooperates with the inner wall of the air inlet channel 10 and the notch to form an upper open groove 11 for embedding the filter box.

[0051] In a further embodiment of this solution, as described in Example 5, the upper end of the groove 11 on the side opposite to the cabinet 1 has a notch 13. This provides space for the filter box to be easily removed, held, or pushed, facilitating filter box replacement.

[0052] Example 6, a further embodiment of this solution, wherein the filter box is an activated carbon box wrapped in non-woven fabric. It is capable of absorbing dust and water.

[0053] In Example 7, a further embodiment of this solution, the heat generated by the frequency converter mainly comes from the IGBT module. Therefore, in this embodiment, a cooling fan is additionally provided inside the cabinet 1 at the IGBT module location. This accelerates local airflow and thus improves the ventilation and heat dissipation efficiency of the corresponding electrical components.

[0054] In this embodiment, when used outdoors, a fixed umbrella-like structure should be provided above the cabinet 1 to prevent water from entering during rainy weather. The air intake duct 10 should be angled downwards to prevent rainwater from dripping in.

[0055] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and application concept of this application, should be included within the scope of protection of this application.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An energy saving control cabinet for variable frequency blower, characterized in that, Includes a cabinet (1), the upper end of which is provided with a heat dissipation grille (2) and a heat dissipation fan (4), both sides of the cabinet (1) are provided with air inlet grilles (3), a filter box is embedded in the air inlet grille (3), and both sides of the cabinet (1) are provided with multiple arc-shaped plates (5) that curve toward the lower middle part of the cabinet (1) at vertical intervals at the air inlet grille (3), and the arc-shaped plates (5) on both sides are symmetrically arranged; A heat dissipation channel (9) is installed at the upper opening of the cabinet (1) by fasteners. A heat dissipation grille (2) is embedded at the port of the heat dissipation channel (9). Multiple heat dissipation fans (4) are installed in a matrix in the heat dissipation channel (9). Air inlet channels (10) are installed at the openings on both sides of the cabinet (1) by fasteners. Air inlet grilles (3) are embedded at the port of the air inlet channel, and curved plates (5) are fixed vertically at intervals in the air inlet channel (10). The arc plate (5) is divided into multiple sections, and each section of the arc plate (5) is detachably connected; each section of the arc plate (5) has a slot at one end facing the inside of the cabinet (1) and a plug rod (6) at the other end; the plug rod (6) has a limiting hole (7) on its end face, and the slot has a countersunk groove corresponding to the limiting hole (7) on its end face, the countersunk groove has a threaded hole in its axis, and a countersunk bolt (8) is screwed into the countersunk groove, with the lower end of the countersunk bolt (8) inserted into the limiting hole (7); The air inlet channel (10) has an upper opening groove (11) on the side of the grille facing the inside of the cabinet (1), and the filter box is installed in the groove (11); The filter box is an activated carbon box wrapped in non-woven fabric.

2. The energy-saving control cabinet for variable frequency fan according to claim 1, characterized in that, The groove (11) has a notch (13) at the upper end of the side facing away from the cabinet (1).

3. The energy-saving control cabinet for variable frequency blower according to claim 1, characterized in that, A cooling fan is installed inside the cabinet (1) at the IGBT module.

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