Air tightness detection device for constant temperature crystal oscillator

Abstract

The utility model discloses an air tightness detection device for a constant temperature crystal oscillator, which comprises a main body mechanism, a constant temperature detection mechanism is fixedly mounted at the top of the main body mechanism, a pressurization mechanism is fixedly mounted on one side of the constant temperature detection mechanism, and the constant temperature detection mechanism comprises a mounting plate. An airtight chamber is fixedly mounted at the top of the mounting plate, a sealing cover is movably mounted at the top of the airtight chamber, a semiconductor chilling plate is fixedly mounted in the airtight chamber, a ceramic heating plate is fixedly mounted in the airtight chamber, and sealing of the interior of the airtight chamber is ensured through the sealing cover; after the pressurization mechanism is used for pressurizing the interior of the airtight chamber to a proper pressure intensity, the semiconductor chilling plate and the ceramic heating plate are used for rapidly controlling the temperature rise and fall in the airtight chamber, and the temperature detector is used for monitoring the temperature in the cavity in the process, so that the accurate control of the temperature is ensured; and in the heating process, through cooperation of the axial flow fan, the first air pipe and the second air pipe, air in the airtight chamber keeps flowing.

Description

Technical Field

[0001] The utility model relates to the technical field of airtightness detection, in particular to an airtightness detection device for a constant temperature crystal oscillator. Background Art

[0002] A crystal oscillator is an electronic oscillator based on the physical properties of quartz crystals. Quartz crystals have a piezoelectric effect, which means that when a quartz crystal is subjected to an external voltage, it will deform, and the deformation will generate electric charge, forming a positive feedback mechanism, thereby spontaneously generating stable mechanical vibrations. This vibration manifests itself as an oscillation of an electrical signal, which generates a stable oscillation frequency.

[0003] The quartz crystal and electronic components inside the crystal oscillator are very sensitive to environmental conditions, especially humidity and oxygen. If the package is not tight, moisture and oxygen in the external environment may penetrate, causing oxidation and corrosion of the crystal surface, affecting its electrical performance, and then affecting the frequency stability of the oscillator. Therefore, the crystal oscillator needs to undergo airtightness testing before leaving the factory to ensure that the package is complete and that the oscillator can maintain good performance and reliability in various environments.

[0004] Although the airtightness detection device for crystal oscillators in the prior art can meet the use requirements to a certain extent, the airtightness detection device for crystal oscillators in the prior art usually does not have the function of simulating the working environment temperature of the crystal oscillator during detection, and cannot fully reflect the true airtightness performance of the crystal oscillator under actual use conditions. Utility Model Content

[0005] The purpose of the utility model is to provide an airtightness detection device for a constant temperature crystal oscillator, which has the advantage of simulating the working environment temperature of the crystal oscillator and solves the problem that the airtightness detection device for the crystal oscillator cannot fully reflect the true airtightness performance of the crystal oscillator under actual use conditions.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an airtightness detection device for a constant temperature crystal oscillator, comprising a main body mechanism, a constant temperature detection mechanism is fixedly installed on the top of the main body mechanism, a pressurizing mechanism is fixedly installed on one side of the constant temperature detection mechanism, the constant temperature detection mechanism comprises a mounting plate, an airtight chamber is fixedly installed on the top of the mounting plate, a sealing cover is movably installed on the top of the airtight chamber, a semiconductor refrigeration plate is fixedly installed inside the airtight chamber, a ceramic heating plate is fixedly installed inside the airtight chamber, an axial flow fan is fixedly installed on the top of the sealing cover, a first air duct is fixedly connected to one side of the axial flow fan, a second air duct is fixedly connected to one side of the axial flow fan, the first air duct and the second air duct are installed inside the airtight chamber through the sealing cover, and a temperature detector is fixedly installed inside the sealing cover.

[0007] As a preferred airtightness detection device for a constant temperature crystal oscillator of the utility model, a placement groove is fixedly installed inside the airtight chamber, a plurality of heat dissipation ports are opened on one side of the semiconductor refrigeration plate, and a sealing ring is fixedly installed on the bottom of the sealing cover.

[0008] As a preferred airtightness detection device for a constant temperature crystal oscillator of the utility model, a one-way valve is fixedly installed on one side of the airtight chamber, and a pressure sensor is fixedly installed inside the airtight chamber.

[0009] As a preferred airtightness detection device for a constant temperature crystal oscillator of the utility model, the main body mechanism includes a frame, and a first cylinder is fixedly installed on the top of the frame.

[0010] As a preferred airtightness detection device for a constant temperature crystal oscillator of the utility model, two groups of operating buttons are fixedly installed on one side of the frame, an emergency stop button is fixedly installed on one side of the frame, and a touch display screen is fixedly installed on the top of the frame.

[0011] As a preferred embodiment of the air tightness detection device for a constant temperature crystal oscillator of the utility model, a plurality of rubber bases are fixedly mounted on the bottom of the frame.

[0012] As a preferred airtightness detection device for a constant temperature crystal oscillator of the utility model, the pressurizing mechanism includes a pressurizing tube, an inflation tube is fixedly installed on one side of the pressurizing tube, a sealing groove is opened inside the pressurizing tube, a second cylinder is fixedly installed on one side of the pressurizing tube, a plug is fixedly installed on one side of the second cylinder, and the plug is slidably installed inside the pressurizing tube.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model ensures the sealing of the interior of the airtight chamber by a sealing cover, and after using a pressurizing mechanism to pressurize the interior of the airtight chamber to a suitable pressure, the temperature rise and fall of the interior of the airtight chamber is quickly controlled by a semiconductor refrigeration sheet and a ceramic heating sheet. During this process, the temperature inside the cavity is monitored by a temperature detector to ensure accurate temperature control. During the heating process, the cooperation between the axial flow fan, the first air duct, and the second air duct is used to keep the air inside the airtight chamber flowing, so that the heat is evenly distributed in the entire space, avoiding local overheating or overcooling that affects the temperature control effect. It has the advantage of simulating the working environment temperature of the crystal oscillator, and solves the problem that the airtightness detection device for the crystal oscillator cannot fully reflect the true airtightness performance of the crystal oscillator under actual use conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a structural diagram of the main mechanism of the utility model;

[0017] Figure 3 It is a partial structural schematic diagram of the constant temperature detection mechanism of the utility model;

[0018] Figure 4 It is a partial structural schematic diagram of the constant temperature detection mechanism of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the pressurizing mechanism of the utility model.

[0020] In the figure: 1. main body; 101. frame; 102. first cylinder; 103. operating button; 104. emergency stop button; 105. rubber base; 106. touch screen; 2. constant temperature detection mechanism; 201. mounting plate; 202. airtight chamber; 203. sealing cover; 204. semiconductor cooling plate; 205. ceramic heating plate; 206. axial flow fan; 207. first air duct; 208. second air duct; 209. temperature detector; 210. placement groove; 211. pressure sensor; 212. one-way valve; 213. heat dissipation port; 214. sealing ring; 3. pressurizing mechanism; 301. pressurizing tube; 302. inflation tube; 303. sealing groove; 304. second cylinder; 305. plug. DETAILED DESCRIPTION

[0021] See also Figure 1-5 , an airtightness detection device for a constant temperature crystal oscillator, comprising a main body mechanism 1, a constant temperature detection mechanism 2 is fixedly installed on the top of the main body mechanism 1, a pressurizing mechanism 3 is fixedly installed on one side of the constant temperature detection mechanism 2, the constant temperature detection mechanism 2 comprises a mounting plate 201, an airtight chamber 202 is fixedly installed on the top of the mounting plate 201, a sealing cover 203 is movably installed on the top of the airtight chamber 202, a semiconductor cooling plate 204 is fixedly installed inside the airtight chamber 202, a ceramic heating plate 205 is fixedly installed inside the airtight chamber 202, an axial flow fan 206 is fixedly installed on the top of the sealing cover 203, a first air duct 207 is fixedly connected to one side of the axial flow fan 206, a second air duct 208 is fixedly connected to one side of the axial flow fan 206, the first air duct 207 and the second air duct 208 penetrate the sealing cover 203 and are installed inside the airtight chamber 202, and a temperature detector 209 is fixedly installed inside the sealing cover 203;

[0022] During use, the crystal oscillator to be tested is placed inside the airtight chamber 202, and the sealing of the airtight chamber 202 is ensured by the sealing cover 203. The pressurizing mechanism 3 is used to pressurize the inside of the airtight chamber 202 to a suitable pressure. The temperature rise and fall inside the airtight chamber 202 is quickly controlled by the semiconductor cooling plate 204 and the ceramic heating plate 205. During this process, the temperature inside the cavity is monitored by the temperature detector 209 to ensure accurate temperature control. During the heating process, the axial flow fan 206, the first air duct 207, and the second air duct 208 cooperate to keep the air inside the airtight chamber 202 flowing, so that the heat is evenly distributed in the entire space, avoiding local overheating or overcooling that affects the temperature control effect. It has the advantage of simulating the working environment temperature of the crystal oscillator, and solves the problem that the airtightness detection device for the crystal oscillator cannot fully reflect the true airtightness performance of the crystal oscillator under actual use conditions.

[0023] Furthermore, a placement groove 210 is fixedly installed inside the airtight chamber 202, a plurality of heat dissipation openings 213 are opened on one side of the semiconductor cooling plate 204, and a sealing ring 214 is fixedly installed at the bottom of the sealing cover 203;

[0024] During use, the crystal oscillator is placed in the groove 210, and the heat dissipation end of the semiconductor cooling plate 204 is dissipated through a plurality of heat dissipation ports 213 to prevent the heat dissipation end of the semiconductor cooling plate 204 from affecting the inside of the airtight chamber 202, and the airtightness of the connection between the sealing cover 203 and the airtight chamber 202 is ensured by the sealing ring 214.

[0025] Furthermore, a one-way valve 212 is fixedly installed on one side of the airtight chamber 202, and a pressure sensor 211 is fixedly installed inside the airtight chamber 202;

[0026] During use, the one-way valve 212 is used to prevent the gas inside the airtight chamber 202 from leaking out, and the pressure sensor 211 is used to detect the internal air pressure of the airtight chamber 202 to obtain the airtightness data of the crystal oscillator.

[0027] Furthermore, the main mechanism 1 includes a frame 101, and a first cylinder 102 is fixedly mounted on the top of the frame 101;

[0028] During use, the lifting and lowering of the sealing cover 203 is controlled by the first cylinder 102 .

[0029] Further, two groups of operating buttons 103 are fixedly installed on one side of the rack 101, an emergency stop button 104 is fixedly installed on one side of the rack 101, and a touch display screen 106 is fixedly installed on the top of the rack 101;

[0030] During use, two sets of operating buttons 103 are used to control the start and stop of the detection process, which is simple and quick. The emergency stop button 104 can quickly terminate the ongoing detection process to avoid further damage to the equipment when the machine fails. At the same time, the touch screen 106 can display the

[0031] Furthermore, a plurality of rubber bases 105 are fixedly mounted on the bottom of the frame 101;

[0032] During use, the frame 101 is supported by a plurality of rubber bases 105 , which ensures the stability of the frame 101 and plays a certain buffering role.

[0033] Further, the pressurizing mechanism 3 includes a pressurizing tube 301, a gas charging tube 302 is fixedly installed on one side of the pressurizing tube 301, a sealing groove 303 is opened inside the pressurizing tube 301, a second cylinder 304 is fixedly installed on one side of the pressurizing tube 301, a plug 305 is fixedly installed on one side of the second cylinder 304, and the plug 305 is slidably installed inside the pressurizing tube 301;

[0034] During use, the detection gas enters the interior of the airtight chamber 202 through the inflation tube 302 and the pressurizing tube 301 in turn, thereby increasing the pressure inside the airtight chamber 202. Through the cooperation among the second cylinder 304, the plug 305, and the sealing groove 303, the opening and closing of the internal passage of the pressurizing tube 301 are flexibly controlled, and cooperates with the one-way valve 212 to form a double insurance to prevent the gas leakage of the airtight chamber 202.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An airtightness detection device for a constant temperature crystal oscillator, comprising a main body (1), a constant temperature detection mechanism (2) fixedly mounted on the top of the main body (1), a pressurizing mechanism (3) fixedly mounted on one side of the constant temperature detection mechanism (2), Features: The constant temperature detection mechanism (2) comprises a mounting plate (201), an airtight chamber (202) is fixedly mounted on the top of the mounting plate (201), a sealing cover (203) is movably mounted on the top of the airtight chamber (202), a semiconductor cooling plate (204) is fixedly mounted inside the airtight chamber (202), a ceramic heating plate (205) is fixedly mounted inside the airtight chamber (202), an axial flow fan (206) is fixedly mounted on the top of the sealing cover (203), a first air duct (207) is fixedly connected to one side of the axial flow fan (206), a second air duct (208) is fixedly connected to one side of the axial flow fan (206), the first air duct (207) and the second air duct (208) pass through the sealing cover (203) and are mounted inside the airtight chamber (202), and a temperature detector (209) is fixedly mounted inside the sealing cover (203).

2. The airtightness detection device for a constant temperature crystal oscillator according to claim 1, Features: A placement groove (210) is fixedly installed inside the airtight chamber (202), a plurality of heat dissipation openings (213) are opened on one side of the semiconductor cooling plate (204), and a sealing ring (214) is fixedly installed at the bottom of the sealing cover (203).

3. The airtightness detection device for a constant temperature crystal oscillator according to claim 1, Features: A one-way valve (212) is fixedly installed on one side of the airtight chamber (202), and a pressure sensor (211) is fixedly installed inside the airtight chamber (202).

4. The airtightness detection device for a constant temperature crystal oscillator according to claim 1, Features: The main body mechanism (1) comprises a frame (101), and a first cylinder (102) is fixedly mounted on the top of the frame (101).

5. The airtightness detection device for a constant temperature crystal oscillator according to claim 4, Features: Two groups of operating buttons (103) are fixedly mounted on one side of the frame (101), an emergency stop button (104) is fixedly mounted on one side of the frame (101), and a touch display screen (106) is fixedly mounted on the top of the frame (101).

6. The airtightness detection device for a constant temperature crystal oscillator according to claim 4, Features: A plurality of rubber bases (105) are fixedly mounted on the bottom of the frame (101).

7. The airtightness detection device for a constant temperature crystal oscillator according to claim 1, Features: The pressurizing mechanism (3) comprises a pressurizing tube (301), an air charging tube (302) is fixedly mounted on one side of the pressurizing tube (301), a sealing groove (303) is provided inside the pressurizing tube (301), a second cylinder (304) is fixedly mounted on one side of the pressurizing tube (301), a plug (305) is fixedly mounted on one side of the second cylinder (304), and the plug (305) is slidably mounted inside the pressurizing tube (301).

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