Heat dissipation structure of portable mass spectrometer and mass spectrometer

Abstract

The utility model relates to the technical field of equipment heat dissipation, and specifically provides a heat dissipation structure of a portable mass spectrometer and a mass spectrometer, the heat dissipation structure comprises a sandwich plate, the sandwich plate is attached to the inner wall of a housing, the sandwich plate and the inner wall of the housing form a chamber, the sandwich plate is provided with a heat conducting sheet penetrating through the sandwich plate, and the heat conducting sheet is provided with a heat conducting wire penetrating through the heat conducting sheet. A fan communicated with the outside is arranged in the cavity, and the fan is a centrifugal fan; according to the utility model, the heat in the shell is transferred into the cavity through the heat-conducting fin, and then the centrifugal fan exhausts hot air in the cavity, so that the interior of the shell is not in direct contact with the outside, dust and other impurities are prevented from entering the mass spectrometer, and meanwhile, the centrifugal fan is small in size, and the air outlet direction is vertical to the air exhaust direction; and the thickness of the chamber is consistent with that of the fan, so that the space is saved, and the volume and portability of the whole mass spectrometer are not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment heat dissipation, and specifically provides a heat dissipation structure of a portable mass spectrometer and a mass spectrometer. Background Art

[0002] A mass spectrometer is an instrument used to separate and detect different isotopes. Based on the principle that charged particles can be deflected in an electromagnetic field, it separates and detects the composition of a substance based on the mass differences of atoms, molecules, or molecular fragments. Using this principle, mass spectrometers are also used to test the sealing of lithium-ion batteries under high vacuum conditions. They can qualitatively and quantitatively detect electrolyte leakage from the test object and display the leakage rate.

[0003] As mass spectrometers become increasingly miniaturized and portable, the various vacuum solenoid valves, gas circuits, and other components in existing mass spectrometers are being integrated into a single gas circuit module as much as possible, and compactly placed in the housing together with the vacuum pump unit. Since mass spectrometers need to operate continuously for extended periods of time, the heat dissipation of the housing is particularly important. Existing heat dissipation methods include passive heat dissipation by providing heat dissipation vents on the side walls of the housing, or by installing a small axial fan on the side walls to blow cool air to lower the temperature of the internal electronic components and vacuum pump unit. Existing vents and blowers alone cannot achieve circulation between the housing and the outside air, resulting in poor heat dissipation and a tendency to introduce external dust. Over time, this can affect the normal operation of the electronic components and, in turn, the service life of the mass spectrometer. Utility Model Content

[0004] The utility model provides a gas leak detection device to solve the problems of inconvenient inspection and disassembly of internal parts and poor heat dissipation of portable small-volume gas leak detection devices in the prior art.

[0005] The technical solution of the utility model is as follows:

[0006] A heat dissipation structure for a portable mass spectrometer includes a sandwich plate, which is attached to the inner wall of a shell. The sandwich plate and the inner wall of the shell form a chamber. A heat conducting plate is provided on the sandwich plate and passes through the sandwich plate. A fan connected to the outside is provided in the chamber, and the fan is a centrifugal fan.

[0007] In this solution, the heat inside the shell is transferred to the chamber through the heat conductive sheet, and the centrifugal fan then discharges the hot air in the chamber, so that the inside of the shell is not in direct contact with the outside world, preventing dust and other impurities from entering the mass spectrometer. At the same time, the air outlet direction of the centrifugal fan is perpendicular to the exhaust direction, so that the thickness of the chamber is consistent with the thinner thickness of the fan, saving space without affecting the volume and portability of the entire mass spectrometer.

[0008] Preferably, one end of the heat conducting plate is arranged in the chamber and is the hot end, and the other end is arranged in the chamber and is the cold end. The fans are arranged at both ends of the chamber, the fan at one end is for air inlet, and the fan at the other end is for air outlet.

[0009] In this solution, fans are installed at both ends of the chamber to form a flowing air duct in the chamber. The hot end of the heat conductor absorbs the heat emitted by the components in the chamber and transmits it to the cold end. The flowing air takes away the heat transferred to the cold end, so that the temperature of the cold end is always lower than that of the hot end, ensuring that the hot end can continuously transfer heat to the cold end, thereby completing the heat dissipation.

[0010] Preferably, the chamber includes a bottom cavity arranged at the bottom of the shell and a side cavity arranged at the side of the shell, the bottom cavity and the side cavity are connected, the air inlet fan is arranged in the bottom cavity, and the air outlet fan is arranged in the side cavity.

[0011] In this scheme, since the fan adopts a centrifugal fan and the cold air is at the bottom and the hot air is at the top, the fan installed in the bottom cavity can suck in the outside cold air from the ground and send it into the cavity. The fan in the side cavity discharges the hot air in the cavity from the side, and the cold air is input from the bottom. After heat exchange, the hot air is discharged from the higher side to form a good air duct, thereby improving the heat dissipation efficiency.

[0012] Preferably, a plurality of fans are respectively provided in the bottom cavity and the side cavity to improve the heat dissipation effect in the cavity.

[0013] Preferably, heat pipes are arranged at intervals in the chamber, the heat pipes are connected to the heat conducting sheet, and heat dissipation fins are arranged at the output ends of the heat pipes. In this solution, the heat pipes are arranged in the chamber, and the heat pipes transfer heat instead of air, which has better thermal conductivity and can further reduce the space of the chamber.

[0014] Preferably, the fan inlet and outlet are both connected to the outside world, and the heat dissipation fins are located at the fan outlet. In this solution, the heat pipe directly transfers heat to the fan outlet, allowing the fan to blow cold air directly to cool the heat dissipation fins, effectively improving the heat dissipation effect of the heat pipe. At the same time, no air flow is generated in the chamber, preventing the formation of condensation water. At the same time, hot air does not pass through the fan, effectively preventing the fan temperature from rising and increasing energy consumption.

[0015] Preferably, the heat conducting sheet at the hot end contacts components in the housing.

[0016] In this solution, the heat conducting sheet can be set at different heights according to the actual layout of the components inside the shell, and in contact with the heating element. For example, the heat conducting sheet set at the gas path module is inserted into the gas path module or is in close contact with the surface of the gas path module, while the heat conducting sheet set at the vacuum pump is in close contact with the pump body, so that the heating element can quickly transfer heat to the heat conducting sheet.

[0017] Preferably, the fan's air inlet is provided with a dust screen. Although the chamber is not connected to the interior of the housing and dust cannot enter the housing, it may still accumulate in the chamber and affect the heat dissipation of the fan. The dust screen can intercept dust and other impurities outside, and subsequent cleaning can be carried out by simply removing the dust screen.

[0018] A portable mass spectrometer is provided with the heat dissipation structure of the portable mass spectrometer, and further comprises a shell and components arranged inside the shell.

[0019] By electrically connecting the fan to the power supply of the mass spectrometer, when the mass spectrometer starts working, the fan starts automatically, the heat conductive sheet transfers the heat inside the shell to the chamber, and the centrifugal fan then discharges the hot air in the chamber, so that the inside of the shell is not in direct contact with the outside world, preventing dust and other impurities from entering the mass spectrometer. At the same time, the air outlet direction of the centrifugal fan is perpendicular to the exhaust direction, so that the thickness of the chamber is consistent with the thickness of the fan, which saves space and does not affect the volume and portability of the entire mass spectrometer.

[0020] Preferably, the shell includes an upper shell cover and a lower basket bottom that are adapted to each other, the upper shell cover and the lower basket bottom are detachably connected, the left and right sides of the lower basket bottom are provided with notches, and right-angled bent plates adapted to the notches are provided on both sides of the upper shell cover.

[0021] Since the components are modularized and integrated in the outer shell, the single shell structure is not easy to observe the internal modules. At the same time, the integrated structural setting makes the modules relatively compact, and there is not enough space to disassemble the internal modules. Therefore, in this solution, the outer shell is divided into two detachably connected parts, and the upper shell cover can be opened quickly and at any time, which facilitates rapid observation, heat dissipation and cleaning of the interior. At the same time, the detachable setting of the internal modules is also more conducive to the inspection and replacement of internal components; and since there are notches on both sides of the bottom of the lower basket, when the upper shell cover is opened, the low sides formed by the notches on both sides of the bottom of the lower basket can expose the components on both sides, so that maintenance personnel have enough space to apply force from the side to disassemble the components on both sides first, and continuously provide disassembly space for subsequent disassembly, effectively avoiding the problem of disassembly difficulty and damage to internal modules caused by insufficient disassembly space in the prior art.

[0022] Beneficial effects of the utility model:

[0023] This utility model transfers heat from the housing to the chamber via a heat conducting sheet, and a centrifugal fan then expels the hot air from the chamber, isolating the interior of the housing from direct contact with the outside world and preventing dust and other impurities from entering the mass spectrometer. Furthermore, the centrifugal fan is compact, and the air outlet and exhaust directions are perpendicular, ensuring that the chamber thickness matches the fan thickness, reducing the chamber's footprint without compromising the overall size and portability of the mass spectrometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the heat dissipation structure of the utility model;

[0026] Figure 2 This is a bottom view schematic diagram of the heat dissipation structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the back of the heat dissipation structure of the utility model;

[0028] Figure 4 This is another schematic diagram of the heat dissipation structure of the utility model;

[0029] Figure 5 Schematic diagram of the mass spectrometer of the present invention.

[0030] In the above drawings, the corresponding reference numerals are as follows:

[0031] 1-shell, 11-upper shell cover, 12-lower basket bottom, 2-sandwich board, 21-side cavity, 22-bottom cavity, 3-heat conducting plate, 4-fan, 5-heat pipe, 6-heat dissipating fins, 7-components, 8-foot pads. DETAILED DESCRIPTION

[0032] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely described through the specific implementation of the embodiments of the present invention.

[0033] Example 1:

[0034] like Figure 1 The heat dissipation structure of a portable mass spectrometer shown in the figure includes a sandwich plate 2, which is attached to the inner wall of the housing 1. The sandwich plate 2 and the inner wall of the housing 1 form a chamber. The sandwich plate 2 is provided with a heat conducting sheet 3 passing through the sandwich plate 2. A fan 4 connected to the outside is provided in the chamber. The fan 4 is a centrifugal fan.

[0035] In this embodiment, it is necessary to ensure that the interior of the mass spectrometer is relatively sealed except when it is under inspection and maintenance. The fan 4 is electrically connected to the power supply of the mass spectrometer, and when the mass spectrometer starts working, the fan 4 will automatically start. The heat conducting plate 3 is made of copper alloy and has good thermal conductivity. The heat conducting plate 3 can well transfer the heat inside the shell 1 to the chamber through the heat conducting plate 3. The centrifugal fan then discharges the hot air in the chamber, so that the interior of the shell 1 is not in direct contact with the outside world, preventing dust and other impurities from entering the interior of the mass spectrometer. It should be noted that the air outlet direction of the centrifugal fan is perpendicular to the exhaust direction, so that the thickness of the chamber is consistent with the thin thickness of the fan 4, so that the fan 4 can be set in a narrow chamber, making the entire heat dissipation structure more compact, without affecting the volume and portability of the entire mass spectrometer.

[0036] The heat conducting sheet 3 at the hot end contacts the components 7 within the housing 1, and the height of each heat conducting sheet 3 is adjusted according to the height of the internal components. The diagram only provides an example of a uniform arrangement. During actual production and installation, the heat conducting sheets 3 do not necessarily need to be evenly arranged. Instead, the heat conducting sheets 3 are positioned according to the layout of the components 7 to provide installation locations for the pump unit. Specifically, for example, the heat conducting sheet 3 at the gas path module can be inserted into the gas path module or closely attached to the surface of the gas path module, while the heat conducting sheet 3 at the vacuum pump is in close contact with the pump body, facilitating rapid heat transfer from the heating element to the heat conducting sheet 3.

[0037] One of the preferred chamber arrangement schemes is that one end of the heat conducting sheet 3 is arranged in the chamber as the hot end, and the other end is arranged in the chamber as the cold end. The fans 4 are arranged at both ends of the chamber, with the fan 4 at one end being the air inlet and the fan 4 at the other end being the air outlet. Figure 4 As shown, a flowing air duct is formed in the chamber, and the hot end of the heat conducting plate 3 absorbs the heat emitted by the components 7 in the chamber and transmits it to the cold end. The flowing air takes away the heat transferred to the cold end, so that the temperature of the cold end is always lower than that of the hot end, ensuring that the hot end can continuously transfer heat to the cold end, thereby completing the heat dissipation.

[0038] Furthermore, the chamber includes a bottom cavity 22 arranged at the bottom of the shell 1 and a side cavity 21 on the side of the shell 1, the bottom cavity 22 and the side cavity 21 are connected, the air inlet fan 4 is arranged in the bottom cavity 22, and the air outlet fan 4 is arranged in the side cavity 21.

[0039] In this solution, because fan 4 is a centrifugal fan with cool air at the bottom and hot air at the top, fan 4 located in bottom chamber 22 draws in cool air from the ground and delivers it into the chamber. Fan 4 in side chamber 21 exhausts the hot air from the side, while cool air is drawn in from the bottom. After heat exchange, the hot air is exhausted from the higher side, forming a good air duct and improving heat dissipation efficiency. It should be noted that when fan 4 is located at the bottom, the selected mass spectrometer should be equipped with feet 8 to allow its bottom to be suspended in the air.

[0040] In this embodiment, another arrangement of the chamber is that a heat pipe 5 is arranged in the chamber, the heat pipe 5 is connected to the heat conducting sheet 3, and a heat dissipation fin 6 is provided at the output end of the heat pipe 5. Figures 1 to 3 shown.

[0041] Specifically, the air inlet and outlet of the fan 4 are both connected to the outside world, and the heat dissipation fins 6 are provided at the air outlet of the fan 4. A heat pipe 5 is provided in the chamber to transfer heat instead of air. The heat pipe 5 has better thermal conductivity and can further reduce the space of the chamber. The heat pipe 5 directly transfers heat to the air outlet of the fan 4, so that the fan 4 blows cold air to directly cool the heat dissipation fins 6, effectively improving the heat dissipation effect of the heat pipe 5. At the same time, no air flow is generated in the chamber, preventing the generation of condensed water. At the same time, hot air does not pass through the fan 4, which can also effectively prevent the fan 4 from increasing its temperature and increasing energy consumption.

[0042] In the above scheme, two fans 4 are provided in the side cavity 21 and the bottom cavity 22. According to actual conditions, multiple heat pipes 5 are connected to the same heat dissipation fin 6, and heat is dissipated by one fan 4. Due to limited height, some mass spectrometer models need to be equipped with a connection socket 9 on the side. There is no space to set up a fan 4 and arrange the heat pipe 5. In this case, it is not necessary to set up the side cavity 21. Only the heat pipe 5, heat conductive plate 3 and fan 4 in the bottom cavity 22 are needed to work.

[0043] Furthermore, a dust screen is provided at the air inlet of the fan 4. Although the chamber is not connected to the interior of the housing 1 and dust cannot enter the housing 1, it may still accumulate in the chamber and affect the heat dissipation of the fan 4. The dust screen can intercept dust and other impurities outside, and subsequent cleaning can be carried out by simply removing the dust screen.

[0044] Example 2:

[0045] A portable mass spectrometer, such as Figures 1 to 5 As shown, the heat dissipation structure of the portable mass spectrometer is provided, and further includes a housing 1 and a component 7 ( Figure 5 Component 7 is not shown).

[0046] By electrically connecting the fan 4 to the power supply of the mass spectrometer, when the mass spectrometer starts working, the fan 4 starts automatically, the heat conducting sheet 3 transfers the heat inside the shell 1 to the chamber, and the centrifugal fan then discharges the hot air in the chamber, so that the inside of the shell 1 is not in direct contact with the outside world, preventing dust and other impurities from entering the mass spectrometer. At the same time, the air outlet direction of the centrifugal fan is perpendicular to the exhaust direction, so that the thickness of the chamber is consistent with the thin thickness of the fan 4, saving space without affecting the volume and portability of the entire mass spectrometer.

[0047] Since the components 7 are modularized and integrated in the outer shell 1, the single shell 1 structure is not easy to observe the internal modules. At the same time, the integrated structural setting makes the modules relatively compact, and there is not enough space to disassemble the internal modules.

[0048] Therefore, in this embodiment, the shell 1 includes an upper shell cover 11 and a lower basket bottom 12 that are adapted to each other. The upper shell cover 11 and the lower basket bottom 12 are detachably connected. Notches are provided on the left and right sides of the lower basket bottom 12, and right-angled bent plates adapted to the notches are provided on both sides of the upper shell cover 11.

[0049] Specifically, the outer shell 1 is divided into two detachably connected parts, and the upper shell cover 11 can be opened quickly and at any time, which facilitates quick observation, heat dissipation and cleaning of the interior. At the same time, the detachable setting of the internal module is also more conducive to the inspection and replacement of the internal components 7; and because there are notches on both sides of the lower basket bottom 12, when the upper shell cover 11 is opened, the low side surfaces formed by the notches on both sides of the lower basket bottom 12 can expose the components 7 on both sides, so that maintenance personnel have enough space to apply force from the side and first disassemble the components 7 on both sides, thereby continuously providing disassembly space for subsequent disassembly, effectively avoiding the problem of disassembly difficulty and damage to the internal module caused by insufficient disassembly space in the prior art.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of protection claimed by the present invention.

Claims

1. A heat dissipation structure for a portable mass spectrometer, characterized in that: The invention comprises a sandwich plate (2), wherein the sandwich plate (2) is attached to the inner wall of a shell (1), wherein the sandwich plate (2) and the inner wall of the shell (1) form a chamber, wherein a heat conducting plate (3) passing through the sandwich plate (2) is provided on the sandwich plate (2), and a fan (4) communicating with the outside is provided in the chamber, wherein the fan (4) is a centrifugal fan.

2. The heat dissipation structure of a portable mass spectrometer according to claim 1, characterized in that: One end of the heat conducting plate (3) is arranged in the chamber, which is the hot end, and the other end is arranged in the chamber, which is the cold end. The fan (4) is arranged at both ends of the chamber, with the fan (4) at one end taking in air and the fan (4) at the other end discharging air.

3. The heat dissipation structure of a portable mass spectrometer according to claim 2, characterized in that: The chamber comprises a bottom chamber (22) arranged at the bottom of the shell (1) and a side chamber (21) on the side of the shell (1); the bottom chamber (22) and the side chamber (21) are connected; the air inlet fan (4) is arranged in the bottom chamber (22), and the air outlet fan (4) is arranged in the side chamber (21).

4. The heat dissipation structure of a portable mass spectrometer according to claim 3, characterized in that: A plurality of fans (4) are respectively arranged in the bottom cavity (22) and the side cavity (21).

5. The heat dissipation structure of a portable mass spectrometer according to claim 4, characterized in that: Heat pipes (5) are arranged at intervals in the chamber, the heat pipes (5) are connected to the heat conducting plate (3), and heat dissipation fins (6) are provided at the output ends of the heat pipes (5).

6. The heat dissipation structure of a portable mass spectrometer according to claim 5, characterized in that: The air inlet and air outlet of the fan (4) are both connected to the outside world, and the heat dissipation fins (6) are arranged at the air outlet of the fan (4).

7. The heat dissipation structure of a portable mass spectrometer according to any one of claims 2 to 6, characterized in that: The heat conducting sheet (3) at the hot end contacts the components (7) in the housing (1).

8. The heat dissipation structure of a portable mass spectrometer according to claim 1, characterized in that: The air inlet of the fan (4) is provided with a dustproof net.

9. A portable mass spectrometer, characterized in that: A heat dissipation structure of a portable mass spectrometer according to any one of claims 1 to 8 is provided, further comprising a housing (1) and components (7) arranged inside the housing (1).

10. The portable mass spectrometer according to claim 9, characterized in that: The housing (1) comprises an upper shell cover (11) and a lower basket bottom (12) adapted to each other, the upper shell cover (11) and the lower basket bottom (12) being detachably connected, the left and right sides of the lower basket bottom (12) being provided with notches, and right-angled bent plates adapted to the notches being provided on both sides of the upper shell cover (11).

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