Pressure control device of thermal resistance test equipment

Abstract

The utility model discloses a pressure control device of thermal resistance test equipment, which comprises a pull rod, an elastic component and a bushing, one end of the pull rod is arranged in the bushing, the elastic component is arranged on the pull rod and limited in the bushing, and the lower end of the bushing is fixedly connected with a heating component. According to the pressure control device of the thermal resistance testing equipment, in the sample testing process of the thermal resistance testing equipment, the pressurizing assembly pressurizes and pushes the cooling assembly to move upwards to be in contact with the heating assembly, the heating assembly is pressed to cause elastic deformation of the elastic assembly, and at the moment, according to different pressures borne by the heating assembly, the elastic assembly is driven to move upwards. And the working states of the elastic components are different, so that low pressure and high pressure are distinguished for targeted control, and the pressure control precision of the thermal resistance testing equipment is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure control, in particular to a pressure control device for thermal resistance testing equipment. Background Art

[0002] Thermal resistance testing equipment is an instrument used to measure the thermal resistance of thermal interface materials such as thermal grease and liquid metal. It is widely used in electronics, electricity, automobile and other industries and has the characteristics of high precision, speed and convenience.

[0003] The thermal resistance testing equipment currently on the market has poor pressure control accuracy, which leads to large differences in simulated thermal resistance tests in different user scenarios and cannot accurately characterize problems in different scenarios and different interface materials. Utility Model Content

[0004] The present application provides a pressure control device for thermal resistance testing equipment, which solves the technical problem of poor pressure control accuracy of pressure control devices for thermal resistance testing equipment in the prior art.

[0005] The present application provides a pressure control device for thermal resistance testing equipment, comprising:

[0006] A pull rod, an elastic component and a bushing, one end of the pull rod is placed in the bushing, the elastic component is installed on the pull rod and confined in the bushing, and the lower end of the bushing is fixedly connected with a heating component.

[0007] In some embodiments, the elastic component includes a first spring and a second spring, a retaining ring is provided on the rod body of the pull rod, the retaining ring is located inside the bushing, the first spring and the second spring are provided on the pull rod, the first spring and the second spring are located on both sides of the retaining ring, and the first spring and the second spring are located inside the bushing.

[0008] In some embodiments, the first spring and the second spring have different elastic forces.

[0009] In some embodiments, one end of the pull rod extending out of the bushing is fixedly connected to a pressure sensor, and the upper end of the pressure sensor is fixedly connected to the top support plate.

[0010] In some embodiments, a cooling component, a pressurizing component and a bottom support plate are also included, and the cooling component and the pressurizing component are respectively fixedly arranged on both sides of the bottom support plate.

[0011] In some embodiments, a pressure control system is further included, and the pressure sensor and the pressurizing component are both connected to the pressure control system.

[0012] The beneficial effects of this application are as follows:

[0013] The utility model provides a pressure control device for thermal resistance testing equipment. When the pressure component is pressurized, the cooling component is pushed upward to touch the heating component. The heating component is pressurized, resulting in elastic deformation of the elastic component. At this time, the working state of the elastic component is different according to the different pressures on the heating component, thereby distinguishing between low pressure and high pressure for targeted control, making the pressure control accuracy of the thermal resistance testing equipment more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model.

[0015] Figure 1 A schematic diagram of the matching structure of an elastic component and a bushing in a pressure control device of a thermal resistance testing equipment provided in the present application;

[0016] Figure 2 A schematic diagram of the overall structure of a pressure control device for thermal resistance testing equipment provided in this application;

[0017] Figure 3 This is the structural diagram of the thermal resistance test equipment under low pressure working state;

[0018] Figure 4 This is the structural diagram of the thermal resistance test equipment under high-pressure working conditions.

[0019] 1: Top support plate; 2: Pressure sensor; 3: Pull rod; 4: First spring; 5: Second spring; 6: Bushing; 7: Heating assembly; 8: Cooling assembly; 9: Bottom support plate; 10: Pressurization assembly. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their 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 addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0023] The embodiment of the present application solves the technical problem of poor pressure control accuracy of the pressure control device of the thermal resistance testing equipment in the prior art by providing a pressure control device of the thermal resistance testing equipment.

[0024] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0025] like Figure 1-Figure 4 As shown, the present application provides a pressure control device for thermal resistance testing equipment, comprising:

[0026] A pull rod 3, an elastic component and a bushing 6, wherein one end of the pull rod 3 is inserted into the bushing 6, the elastic component is mounted on the pull rod 3 and confined inside the bushing 6, and a heating component 7 is fixedly connected to the lower end of the bushing 6.

[0027] When the equipment is in the initial state of preparation, the weight of the heating component 7 pulls the bushing 6 downward, and the elastic component produces elastic deformation to overcome the gravity of the heating component 7, so that the thermal resistance testing equipment is in a balanced state, making the pressure control accuracy of the thermal resistance testing equipment more precise.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Specifically, the elastic component includes a first spring 4 and a second spring 5. A retaining ring is provided on the rod body of the pull rod 3, and the retaining ring is located inside the bushing 6. The first spring 4 and the second spring 5 are arranged on the pull rod 3, and the first spring 4 and the second spring 5 are located on both sides of the retaining ring. The first spring 4 and the second spring 5 are located inside the bushing 6. The elastic forces of the first spring 4 and the second spring 5 are different. The first spring 4 is located above the retaining ring, and the second spring 5 is located below the retaining ring. The first spring 4 is a low-pressure spring, and the second spring 5 is a high-pressure spring. Hooke's law states that after a solid material is subjected to force, there is a linear relationship between the stress and strain (unit deformation) in the material, and the expression is F=-kx, k is the stiffness coefficient of the object, and the elastic coefficient of the second spring is greater than the elastic coefficient of the first spring.

[0030] One end of the pull rod 3 extending out of the bushing 6 is fixedly connected to the pressure sensor 2 , and the upper end of the pressure sensor 2 is fixedly connected to the top support plate 1 .

[0031] When the equipment is in the initial state of preparation, the elastic component is pulled and compressed. Specifically, the first spring 4 generates elastic force after compression to overcome the weight of the heating component 7, so that the equipment is in a balanced state. Clearing the pressure value of the pressure sensor 2 to zero can ensure accurate and stable pressure measurement.

[0032] The pressure control device of the thermal resistance testing equipment further includes a cooling component 8 , a pressurizing component 10 and a bottom support plate 9 . The cooling component 8 and the pressurizing component 10 are fixedly arranged on both sides of the bottom support plate 9 , respectively.

[0033] During the equipment test pressurization process, when the pressure applied by the pressurization component 10 is less than the weight of the heating component 7, the second spring 5 is not subjected to force, and the rebound force of the first spring 4 and the pressure applied by the pressurization component 10 on the heating component 7 and the gravity of the heating component 7 keep the equipment force state balanced. The pressure sensor 2 can then display the pressure applied by the pressurization component 10 on the heating component 7, that is, the force applied by the thermal resistance test equipment to the sample.

[0034] When the pressure applied by the pressurizing component 10 is greater than the weight of the heating component 7, the first spring 4 is not subjected to force, and the rebound force of the second spring 5 overcomes the pressure applied by the pressurizing component 10 on the heating component 7 and the weight of the heating component 7, so that the state of the equipment force remains balanced. The pressure sensor 2 can then display the pressure applied to the heating component 7, that is, the force applied by the thermal resistance test equipment to the sample.

[0035] The pressure control device of the thermal resistance testing equipment further comprises a pressure control system, and the pressure sensor 2 and the pressurizing component 10 are both connected to the pressure control system.

[0036] The pressure sensor 2 is mounted on the top support plate 1, and the first spring is inserted into the tie rod 3 and connected to one side of the pressure sensor 2. The second spring is mounted on the other side of the tie rod 3, and the bushing 6 is assembled to the long end of the spring tie rod 3. The tie rod 3 is then connected to the pressure sensor 2, and the heating component 7 is connected to the bushing 6. The pressurizing component 10 is mounted and fixed on the bottom support plate 9. The pressurizing component 10 is pressurized. After the heating component 7 and the cooling component 8 are in contact, the pressure sensor 2 is pressurized, and then a signal is sent to the pressure control system. The pressure control system controls the pressurizing component 10 to pressurize, and finally completes the pressure control of the entire system.

[0037] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pressure control device for thermal resistance testing equipment, characterized in that: include: A pull rod, an elastic component, a bushing, a cooling component, a pressurizing component and a bottom support plate, wherein one end of the pull rod is inserted into the bushing, the elastic component is mounted on the pull rod and confined inside the bushing, and the lower end of the bushing is fixedly connected to a heating component; one end of the pull rod extending out of the bushing is fixedly connected to a pressure sensor, and the upper end of the pressure sensor is fixedly connected to the top support plate; the cooling component and the pressurizing component are respectively fixedly arranged on both sides of the bottom support plate.

2. The thermal resistance testing equipment pressure control device according to claim 1, characterized in that: The elastic component includes a first spring and a second spring. A retaining ring is provided on the rod body of the pull rod, and the retaining ring is located inside the bushing. The first spring and the second spring are provided on the pull rod, and the first spring and the second spring are located on both sides of the retaining ring. The first spring and the second spring are located inside the bushing.

3. The thermal resistance testing equipment pressure control device according to claim 2, characterized in that: The first spring and the second spring have different elastic forces.

4. The thermal resistance testing equipment pressure control device according to claim 1, characterized in that: It also includes a pressure control system, and the pressure sensor and the pressurizing component are both connected to the pressure control system.

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