A resistance wire load device for power supply performance testing

Abstract

The present invention relates to a resistance wire load device for power supply performance testing, which comprises a frame, a plurality of resistance units arranged side by side in the frame and capable of being connected in parallel or in series, wherein each resistance unit comprises a mounting frame and a resistance wire wound on the mounting frame, the mounting frame comprises a mounting seat in the shape of an elongated strip, a resistance wire fixing seat arranged on the mounting seat, wherein the resistance wire fixing seat is an insulating member, the resistance wire is spirally wound on the resistance wire fixing seat, a plurality of heat dissipation through holes are distributed on the mounting seat, the resistance wire fixing seat has two pieces, and is respectively positioned on opposite sides of the side where the length direction of the mounting seat is located, and the resistance wire load device also comprises a fan assembly arranged in one-to-one correspondence with each resistance unit and for air-cooling the resistance wire. The present invention uses the heat dissipation through holes and the fan assembly in combination to blow the hot air flow out of the frame, thereby quickly realizing the cooling of the resistance wire and extending the service life of the resistance wire.

Description

Technical Field

[0001] The invention belongs to the field of power supply performance testing equipment, and in particular relates to a resistance wire load device for power supply performance testing. Background Art

[0002] At present, there are usually two types of existing electrical load devices: dry resistors and water resistors. Dry resistors are mainly made of contactors and resistance wires, and the parallel and series connection of the resistance wires is changed by closing the contactors to obtain a specified resistance value; water resistors are mainly made of metal plates and water, and the specified resistance value is obtained by adjusting the distance or contact area between the metal plates and water.

[0003] However, the resistance wire is generally spirally wound on an insulating mounting frame, and then the two ends of the resistance wire are connected to the contactor circuit through wires. After the resistance wire is energized, due to the high temperature of the resistance wire, if the insulating mounting frame does not dissipate the heat in time, the service life of the resistance wire will be directly affected. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an improved resistance wire load device for power supply performance testing. The device uses heat dissipation through holes and a fan assembly to blow hot air out of the frame, thereby quickly cooling the resistance wire and extending the service life of the resistance wire.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A resistance wire load device for power supply performance testing comprises a frame, a plurality of resistance units arranged side by side in the frame and capable of being connected in parallel or in series, wherein each resistance unit comprises a mounting frame and a resistance wire wound on the mounting frame, the mounting frame comprises a mounting seat in the form of an elongated strip, a resistance wire fixing seat arranged on the mounting seat, wherein the resistance wire fixing seat is an insulating member, the resistance wire is spirally wound on the resistance wire fixing seat, a plurality of heat dissipation through holes are distributed on the mounting seat, there are two resistance wire fixing seats, and they are respectively positioned on opposite sides of the side where the length direction of the mounting seat is located, and the resistance wire load device also comprises a fan assembly which is arranged in one-to-one correspondence with each resistance unit and performs air cooling on the resistance wire.

[0007] Preferably, the airflow direction formed by the fan assembly is consistent with the extending direction of the heat dissipation through hole, so as to facilitate heat dissipation.

[0008] According to a specific implementation and preferred aspect of the present invention, the fan assembly is connected to the corresponding resistor unit circuit, and when any one of the multiple resistor units is in a powered-on state, the corresponding fan assembly is in a working state. That is to say, when some of the multiple resistor units are in a working state, the corresponding fan assembly is also in a working state, which facilitates the control of the working state of the fan assembly.

[0009] In order to ensure the heat dissipation effect, each resistance unit can be provided with multiple fans for heat dissipation.

[0010] According to another specific implementation and preferred aspect of the present invention, the mounting seat includes a rectangular seat plate and connecting plates arranged on both sides of the seat plate in the length direction, wherein the heat dissipation holes extend along the thickness direction of the seat plate and are distributed on the seat plate, and the resistance wire fixing seat is arranged on the connecting plates.

[0011] Furthermore, a matching groove is formed on the resistance wire fixing seat, and the connecting plate and the matching groove are matched and snap-fitted.

[0012] According to another specific implementation and preferred aspect of the present invention, the connecting plate is vertically arranged to the seat plate, and the two connecting plates are symmetrically arranged about the center line of the length direction of the seat plate.

[0013] Specifically, the connecting plate is located on the same side of the seat plate. Alternatively, the cross section formed by the connecting plate and the seat plate is an I-shaped cross section. Both implementations are possible. In this example, the former is adopted.

[0014] According to another specific implementation and preferred aspect of the present invention, the connecting plate includes a plate body and limiting ears arranged at both ends of the plate body, wherein the limiting ears are arranged perpendicular to the plate body and fit on the two end surfaces of the resistance wire fixing seat. The setting of the limiting ears makes the connection between the resistance wire fixing seat and the mounting seat more stable.

[0015] Preferably, the mounting frame further comprises connecting ears arranged at both ends of the seat plate.

[0016] Furthermore, the connecting ear includes a first panel that fits the seat plate, and a second panel for connecting the first panel to the external frame, wherein the first panel is provided with an elongated hole extending along the length direction of the seat plate. The purpose of providing the elongated hole is to facilitate the adjustment of the resistance wire position and facilitate installation.

[0017] In addition, the resistance wire fixing seat is a ceramic part.

[0018] Due to the implementation of the above technical solution, the present invention has the following advantages compared with the prior art:

[0019] Under the premise of ensuring the insulation installation of the resistance wire, the present invention uses the heat dissipation through hole and the fan assembly in coordination to blow the hot air flow out of the frame, thereby quickly cooling the resistance wire and extending the service life of the resistance wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view schematic diagram of the resistance wire load device of the present invention (partially omitted);

[0021] Figure 2 for Figure 1 A magnified schematic diagram of the middle resistor unit;

[0022] Figure 3 for Figure 2 Schematic diagram of the left side (connecting ears omitted);

[0023] Figure 4 for Figure 2 An enlarged schematic diagram of the main view of the middle mounting seat;

[0024] Figure 5 for Figure 4 Schematic top view of .

[0025] Among them: K, frame;

[0026] R, resistor unit; A, mounting frame; S, fan assembly; S1, fan; 1, mounting seat; 1a, heat dissipation through hole; 10, seat plate; 11, connecting plate; 110, plate body; 111, limiting ear;

[0027] 2. Resistance wire fixing seat; 20. Matching groove;

[0028] 3. Resistance wire;

[0029] 4. Connecting ear; 41. First panel; 42. Second panel; 4a. Long hole;

[0030] 5. Conductive connecting piece. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0037] like Figure 1 As shown, the resistance wire load device for power supply performance testing of the present embodiment includes a frame K, a plurality of resistance units R arranged side by side in the frame K and capable of being connected in parallel or in series, wherein each resistance unit R includes a mounting frame A and a resistance wire 3 wound on the mounting frame A, and a fan assembly S which is arranged one-to-one with each resistance unit and for air cooling the resistance wire 3.

[0038] Specific, combined Figure 2 and Figure 3 As shown, the mounting frame A includes a long strip-shaped mounting seat 1 and a resistance wire fixing seat 2 arranged on the mounting seat 1, wherein the resistance wire fixing seat 2 is an insulating member, such as a ceramic member, and the resistance wire 3 is spirally wound on the resistance wire fixing seat 2.

[0039] There are two resistance wire fixing seats 2, which are respectively positioned on two opposite sides of the side where the length direction of the mounting seat 1 is located.

[0040] A plurality of heat dissipation holes 1 a are distributed on the mounting base 1 .

[0041] In this example, the airflow direction formed by the fan assembly S is consistent with the extending direction of the heat dissipation through hole 1a, which is convenient for heat dissipation.

[0042] Specifically, the fan assembly S is connected to the corresponding resistor unit R in a circuit, and when any one of the multiple resistor units R is in a powered-on state, the corresponding fan assembly S is in a working state. In other words, when some of the multiple resistor units R are in a working state, the corresponding fan assembly S is also in a working state, which facilitates the control of the working state of the fan assembly S.

[0043] In order to ensure the heat dissipation effect, each resistor unit R can be provided with a plurality of fans S1 for heat dissipation. In this example, one resistor unit R is provided with two fans S1 arranged side by side and located on the same side.

[0044] Combination Figure 4 and Figure 5As shown, the mounting seat 1 includes a rectangular seat plate 10 and connecting plates 11 arranged on both sides of the seat plate 10 in the length direction, wherein the heat dissipation holes 1a extend along the thickness direction of the seat plate 10 and are distributed on the seat plate 10, and the resistance wire fixing seat 2 is arranged on the connecting plates 11.

[0045] In this example, a matching groove 20 is formed on the resistance wire fixing seat 2, and the connecting plate 11 and the matching groove 20 are matched and snap-fitted.

[0046] The connecting plate 11 is vertically arranged to the seat plate 10 , and the two connecting plates 11 are symmetrically arranged about the center line of the length direction of the seat plate 10 .

[0047] In this example, the connecting plate 11 is located on the same side of the seat plate 10 .

[0048] At the same time, the connecting plate 11 includes a plate body 110 and limiting ears 111 arranged at both ends of the plate body 110, wherein the limiting ears 111 are arranged perpendicular to the plate body 110 and are attached to the two end surfaces of the resistance wire fixing seat 2. The setting of the limiting ears 111 makes the resistance wire fixing seat 2 and the mounting seat 1 more stably connected.

[0049] The mounting frame further includes connecting ears 4 arranged at both ends of the seat plate 10 .

[0050] The connecting ear 4 includes a first panel 41 that fits the seat plate 10 and a second panel 42 that connects the first panel 41 to the external frame, wherein the first panel 41 is provided with an elongated hole 4a extending along the length direction of the seat plate 10. The purpose of providing the elongated hole is to facilitate the adjustment of the resistance wire position and facilitate installation.

[0051] In addition, the resistance wire fixing seat 2 is a ceramic component.

[0052] Meanwhile, in this example, conductive connecting pieces 5 are fixedly provided at both ends of the resistance wire 3, and then the conductive connecting pieces 5 are connected to the contactor circuit through a wire.

[0053] Therefore, this embodiment has the following advantages:

[0054] 1) By using the heat dissipation holes and the fan assembly together, the hot air flow is blown out of the frame, thereby quickly cooling the resistance wire and extending the service life of the resistance wire;

[0055] 2) Connect the fan to the corresponding resistance unit circuit to ensure that they are in a synchronous working state to facilitate the control of the fan;

[0056] 3) The use of the connection plate not only facilitates the positioning and installation of the resistor wire fixing seat, but also maximizes the distribution of the heat dissipation holes on the seat plate, thereby facilitating heat dissipation;

[0057] 4) By setting the limiting ears, the resistance wire fixing seat and the mounting seat are more stably connected.

[0058] ), through the setting of the connecting ear, it is convenient to adjust the position of the resistance wire and facilitate installation.

[0059] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them. It does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A resistance wire load device for power supply performance testing, comprising a frame, a plurality of resistance units arranged side by side in the frame and capable of being connected in parallel or in series, wherein each of the resistance units comprises a mounting frame and a resistance wire wound on the mounting frame, the mounting frame comprises a mounting seat in a long strip shape, a resistance wire fixing seat arranged on the mounting seat, wherein the resistance wire fixing seat is an insulating member, and the resistance wire is spirally wound on the resistance wire fixing seat, Features: The mounting base is provided with a plurality of heat dissipation holes, the resistance wire fixing base has two pieces, and they are respectively positioned on the opposite sides of the side in the length direction of the mounting base, and the resistance wire load device also includes a fan assembly which is arranged in a one-to-one correspondence with each of the resistance units and cools the resistance wire by air; The airflow direction formed by the fan assembly is consistent with the extension direction of the heat dissipation through hole, wherein the fan assembly is connected to the corresponding resistor unit circuit, and when any one of the plurality of resistor units is in a powered-on state, the corresponding fan assembly is in a corresponding working state; The mounting seat comprises a rectangular seat plate, connecting plates arranged on both sides of the seat plate in the length direction, the resistance wire fixing seat is arranged on the connecting plates, a matching groove is formed on the resistance wire fixing seat, and the connecting plates and the matching groove are matched and clamped; The connecting plate comprises a plate body and limiting ears arranged at both ends of the plate body, wherein the limiting ears are arranged perpendicular to the plate body and are attached to the two end surfaces of the resistance wire fixing seat; The heat dissipation through holes extend along the thickness direction of the seat plate and are distributed on the seat plate; The connecting plate is arranged perpendicularly to the seat plate, and the two connecting plates are arranged symmetrically about the center line of the length direction of the seat plate.

2. The resistance wire load device for power supply performance testing according to claim 1, characterized in that: The mounting frame also includes connecting ears arranged at two ends of the seat plate.

3. The resistance wire load device for power supply performance testing according to claim 2, characterized in that: The connecting ear comprises a first panel fitted with the seat plate and a second panel used to connect the first panel with an external frame, wherein the first panel is provided with an elongated hole extending along the length direction of the seat plate.

4. The resistance wire load device for power supply performance testing according to claim 1, characterized in that: The resistance wire fixing seat is a ceramic piece.

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