CN210417056U - Liquid filling device and system for filling liquid - Google Patents

Abstract

The utility model provides a liquid adds filling device and is used for adding the system of filling liquid. In one implementation, the liquid filling apparatus includes: the air pipe, wherein, supply the compressed air to the airtight container which holds liquid through the said air pipe; a switch arranged on the gas pipe for controlling the on/off of the gas pipe; the conduction relief valve is arranged on the gas conveying pipe and used for opening pressure relief when the gas pressure in the gas conveying pipe exceeds a certain threshold value; a barometer disposed on the gas delivery conduit for measuring a pressure of the gas in the gas delivery conduit; and a liquid transport tube, wherein the liquid in the closed vessel is supplied to a target vessel via the liquid transport tube by means of a pressure applied to a liquid surface in the closed vessel by the supplied compressed air.

Description

Liquid filling device and system for filling liquid

Technical Field

The present invention relates generally to a device for filling liquid and a system for filling liquid, and more particularly, to a device and corresponding system for filling liquid into a target container using pressure generated by compressed air.

Background

As one of the most important inventions in the twentieth century, the advent of semiconductor integrated circuits has been driving aspects of human technological progress. In the field of semiconductor manufacturing, post-package/chip testing is a very important link. The chip test includes detecting whether the chip can normally operate under various operating environments/states, for example, detecting whether the chip can achieve a specified function/achieve a specified performance at a specific temperature (low temperature, high temperature)/temperature range. Temperature control during chip testing usually requires the use of a liquid such as cooling liquid or heat conducting liquid filled into a corresponding container/pipe of the chip testing equipment, and liquid filling is a relatively frequent operation during chip testing.

One conventional means of priming the liquid in the prior art is to use a charge pump, which typically comprises a battery and a turbo pump. When the charge pump works, the electric power provided by the storage battery drives the turbine pump to pump the liquid in the liquid tank containing the cooling liquid or the heat-conducting liquid into a target container/pipeline of the chip testing equipment. The work of charge pump relies on the battery, and frequent charge demand makes charge pump be difficult to manage and maintain, and among the daily work, thereby operating personnel can meet often and just discover when needing to use that charge pump does not fill the condition that the electric charge influences the job schedule. In addition, the battery and the turbo pump themselves, as well as the circuit structure in the charge pump, are also prone to malfunction or damage. These result in a relatively high cost and short life for the charge pump. In addition, the charge pump has a large overall weight due to the presence of the battery and the turbo pump, and is inconvenient to move and carry.

Another conventional means of filling the target container/tube of the chip testing apparatus with a cooling or heat conducting liquid is to use a plastic hose with a bladder. One end of the hose is inserted into the cooling or heat conducting liquid in the liquid tank, while the other end is inserted into/connected to the container/pipe of the chip testing apparatus. In operation, the operator must repeatedly squeeze and release the bladder by hand to draw the coolant or heat transfer fluid into the hose and into the target vessel/conduit. However, such manual operation is very laborious and inefficient, and the frequent squeezing of the rubber bladder makes the bladder easily broken to cause liquid leakage.

Not only during chip testing, filling liquids is a frequently involved operation in many other production/manufacturing environments, even daily life. The conventional means of filling liquids described above do not meet the practical requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure, not fragile and easy to operate's liquid adds filling device and corresponding system for overcome the above-mentioned defect at least that exists among the prior art.

According to the utility model discloses an aspect provides a liquid adds filling device, liquid adds filling device can include: the air pipe, wherein, supply the compressed air to the airtight container which holds liquid through the said air pipe; a switch arranged on the gas pipe for controlling the on/off of the gas pipe; the conduction relief valve is arranged on the gas conveying pipe and used for opening pressure relief when the gas pressure in the gas conveying pipe exceeds a certain threshold value; a barometer disposed on the gas delivery conduit for measuring a pressure of the gas in the gas delivery conduit; and a liquid transport tube, wherein the liquid in the closed vessel is supplied to a target vessel via the liquid transport tube by means of a pressure applied to a liquid surface in the closed vessel by the supplied compressed air.

Optionally, in one example of the above aspect, the switch may be a self-locking switch.

Optionally, in one example of the above aspect, the switch may be a self-resetting switch.

Alternatively, in one example of the above aspect, the purge valve and the barometer may be integrated into one component.

Optionally, in one example of the above aspect, the liquid filling apparatus may further include a housing that may house at least the switch, the relief valve, and the barometer.

Optionally, in one example of the above aspect, the housing may be provided with one or more vents.

Optionally, in an example of the above aspect, the liquid filling apparatus may further comprise a magnetic base.

Alternatively, in one example of the above aspect, at least one segment of the infusion tube may be a metal hose, one end of the metal hose is a liquid outlet end of the infusion tube, and the other end of the metal hose is fixed to the housing.

Alternatively, in one example of the above aspect, the other end of the metal hose may be fixed to the housing by a threaded fastener.

Alternatively, in one example of the above aspect, the liquid may be a cooling liquid.

Alternatively, in one example of the above aspect, the liquid may be a thermally conductive liquid.

Optionally, in one example of the above aspect, the target container may be part of a chip testing apparatus.

According to another aspect of the present invention, there is provided a system for filling liquid, the system may include: a compressed air preparation device; and a liquid filling apparatus as described herein, wherein the air outlet end of the compressed air preparation apparatus is in communication with the air inlet end of the air delivery pipe of the liquid filling apparatus.

Drawings

The practice of the present invention is illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to the same or similar parts and in which:

fig. 1 is a schematic diagram in accordance with some implementations of the present invention;

fig. 2 illustrates an exemplary apparatus according to one implementation of the invention;

fig. 3 illustrates an exemplary apparatus according to one implementation of the invention; and

fig. 4 illustrates an exemplary system in accordance with one implementation of the invention.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth. However, it is understood that implementations of the invention may be practiced without these specific details. In other instances, well-known circuits, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

Reference throughout this specification to "one implementation," "an example implementation," "some implementations," "various implementations," or the like, means that the implementation of the invention described may include a particular feature, structure, or characteristic, however, it is not necessary for every implementation to include the particular feature, structure, or characteristic. In addition, some implementations may have some, all, or none of the features described for other implementations.

In the following description and claims, the terms "coupled" and "connected," along with their derivatives, may be used. It should be understood that these terms are not intended as synonyms for each other. Rather, in particular implementations, "connected" is used to indicate that two or more elements are in direct physical or electrical contact with each other, and "coupled" is used to indicate that two or more elements cooperate or interact with each other, but they may or may not be in direct physical or electrical contact.

Reference is now made to fig. 1, which is a schematic illustration of some implementations in accordance with the present invention.

In order to enable the liquid contained in the closed container 180 to be supplied to the target container 190 through the liquid transfer tube 125, as shown in fig. 1, in some implementations of the present invention, an air transfer tube 105 is provided for supplying compressed air to the closed container 180. As shown in fig. 1, in some implementations of the present invention, a switch 110 is disposed on the gas delivery conduit 105. The switch 110 is used to control the on/off of the gas delivery conduit 105.

As shown in FIG. 1, in some implementations of the present invention, a pressure relief valve 115 is also disposed on the air delivery conduit 105. The conduction relief valve 115 is used for opening pressure relief when the air pressure in the air delivery pipe 105 exceeds a certain threshold value. Further, as shown in FIG. 1, in some implementations of the present invention, a barometer 120 is also disposed on the air delivery conduit 105. The barometer 120 is used to measure the air pressure in the air delivery conduit 105.

With continued reference to fig. 1, the inlet end of the infusion tube 125 is inserted below the liquid level in the sealed container 180, for example, may be inserted into the bottom of the sealed container 180. The closed vessel 180 and the infusion tube 125 constitute a communicating vessel. As compressed air is continuously supplied to the enclosed container 180 through the air delivery conduit 105 via the switch 110, the pressure relief valve 115, and the barometer 120, the pressure experienced by the liquid level in the enclosed container 180 gradually increases. Due to the sufficient pressure difference between the liquid levels at the two ends of the communicating vessel, the liquid in the sealed container 180 flows towards the liquid outlet end through the liquid inlet end of the liquid conveying pipe 125 and finally flows into the target container 190.

Referring now to fig. 2, shown is a block diagram of an exemplary apparatus 200 in accordance with one implementation of the present invention.

As shown in fig. 2, the example fluid filling apparatus 200 is used to supply fluid contained in a containment vessel 280 to a target vessel 290. In accordance with one implementation of the present disclosure, the example apparatus 200 may include an air delivery conduit 205, a switch 210, a conduction relief valve 215, a barometer 220, and an infusion tube 225.

As shown in fig. 2, the air delivery pipe 205 is used to supply compressed air to the closed container 280 containing liquid. In some examples, the compressed air may be derived from a compressed air output already provided in an existing industrial or production environment, and in other examples, the compressed air may be derived from a separately provided compressed air preparation device, such as an air pump, for example, although the invention is not limited thereto.

As shown in fig. 2, in accordance with one implementation of the present invention, a switch 210 is disposed on the air delivery conduit 205 for controlling the on/off of the air delivery conduit 205.

In some examples, the switch 210 may be implemented as a self-locking switch. For example, the switch 210 may be a toggle self-locking switch that is turned on and held when an operator toggles the switch handle in one direction (e.g., downward), and compressed air may flow freely through the switch. And when the operator then toggles the switch lever in the opposite direction (e.g., up), the switch is opened, thereby preventing the flow of compressed air through the switch. By utilizing the self-locking switch, once the switch is switched on, the liquid filling operation can be automatically carried out, and only an operator needs to dial the switch handle once again when the operation is finished, so that the operation process is simplified, and the possibility of simultaneously operating a plurality of liquid filling devices in a time period is also realized.

In other examples, switch 210 may also be implemented as a self-resetting switch. For example, the switch 210 may be a push button type self-resetting switch that is turned on when an operator holds down a switch button by hand, and compressed air may freely flow through the switch. Once the operator's hand is released, the switch button automatically resets and the switch returns to the off state, thereby preventing the flow of compressed air through the switch. The self-reset switch is particularly suitable for working scenes that an operator is required to monitor the filling operation of one liquid filling device in real time so as to control the air pressure at any time, control the liquid flow, avoid accidents and the like.

Although the self-locking switch and the self-resetting switch are described herein using a toggle type self-locking switch and a push button type self-resetting switch as examples, respectively, it will be readily understood by those skilled in the art that each of the self-locking switch and the self-resetting switch may be implemented in other forms than the above. Moreover, other types of switches besides self-locking switches and self-resetting switches may also be employed to implement switch 210, and the invention is not limited in this respect to a particular implementation.

As shown in fig. 2, in accordance with one implementation of the present invention, a conduction relief valve 215 is also disposed on the air delivery conduit 205, which is used to open a pressure relief when the air pressure in the air delivery conduit 205 exceeds a certain threshold.

In some examples, the wastegate valve 215 may typically be a three-way structure, with the left and right pipes in direct communication, and compressed air may pass freely. The upper end is provided with a pressure relief mechanism, when the air pressure in the pipeline exceeds a certain threshold value, the pressure relief mechanism is automatically opened to release the pressure outwards, and when the air pressure is reduced to be below the threshold value, the pressure relief mechanism is automatically closed, so that the damage to the air pipe 205/the closed container 280 caused by overhigh air pressure in the air pipe 205/the closed container 280 can be avoided.

Further, as shown in fig. 2, according to one implementation of the present invention, a barometer 220 is also arranged on the gas delivery pipe 205 for measuring the pressure in the gas delivery pipe 205.

By observing the real-time readings of the barometer 220, the operator can determine whether the air pressure within the air delivery conduit 205/sealed container 280 is within a normal range and accordingly can take immediate action to eliminate possible anomalies.

It should be noted that although the pressure relief valve 215 and the air pressure gauge 220 are shown as two separate components for ease of explanation in the description herein, in some examples, the pressure relief valve 215 and the air pressure gauge 220 may be integrated into one component, which makes the internal structure of the apparatus 200 simpler and more compact.

As described above, the pressure applied to the liquid surface in the closed container 280 is gradually increased by the compressed air supplied to the closed container 280 through the switch 210, the conduction relief valve 215 and the air pressure gauge 220 via the air pipe 205, so that the liquid in the closed container 280 flows in the direction of the liquid outlet end through the liquid inlet end of the liquid pipe 225 inserted below the liquid surface, and finally flows into the target container 290.

Optionally, in accordance with one implementation of the present invention, the example liquid filling apparatus 200 may further include a housing 270 that houses at least the switch 210, the conduction relief valve 215, and the barometer 220. The housing 270 may be fabricated from any suitable material/material combination, and in some examples, at least a portion (e.g., a bottom surface) of the housing 270 may be made of a ferromagnetic material. In addition, the shape of the housing 270 may be a rectangular parallelepiped, a cube, a cylinder, or other various shapes depending on actual requirements.

According to one implementation of the present invention, the housing 270 is provided with a plurality of openings through which the gas pipe 205 and the infusion pipe 225 can pass. It will be appreciated that the housing 270 may also be provided with openings corresponding to the operable, viewable, etc. portions of one or more of the components it houses, for example, the housing 270 may be provided with openings that respectively accommodate the switch handle portion of the switch 205 and the dial portion of the barometer 220. The openings may be arranged on any surface of the housing 270 in any direction, depending on the particular needs. In addition, in some examples, one or more vents may also be disposed on the housing 270, for example, the vents may be disposed on a bottom surface of the housing 270. One purpose of the vent is to facilitate venting of the pressure relief valve 215 when needed.

Further, in some examples, at least a segment of the infusion tube 225 may be a metal hose. For example, the infusion tube 225 may be provided with a metal hose throughout its length from its inlet end (which, in use, is inserted below the liquid level in the closed container 280) to its outlet end (which, in use, is inserted into the target container 290), at least from the outlet end to the point where the infusion tube 225 contacts the housing 270 (as indicated by arrow 275 in fig. 2), so that the placement of the infusion tube 225 (and more particularly, its outlet end) may be easily adjusted relative to the opening of the target container 290 during operation.

Further, in some examples, at the contact location indicated by arrow 275, a threaded fastener may be provided or secured to the housing 270 and the corresponding end of the metal hose may be provided with a mating threaded fastener. The end of the infusion tube 225 can be fixed to the housing 270 with high strength by means of screw fastening. Meanwhile, because the exemplary liquid filling device 200 of the present invention has a simple structure and a light weight, the metal hose can be directly used as the handle of the device 200 in some cases, so that the device 200 can be conveniently moved and carried. It is noted that other ways of securing the metal hose to the housing are possible, and the invention is not limited in this respect to a particular implementation.

Further, in some examples, a section on the outlet end side of the gas pipe 205 and a section on the inlet end side of the liquid pipe 225 are inserted into the closed container 280 through an upper cover that is fitted to an opening (not shown) in the top of the closed container 280. In some examples, the portion of the air pipe 205 extending into the sealed container 280 has a short length, for example, the air outlet end can be closed near the upper cover of the sealed container 280, and the compressed air discharged from the air outlet end is directly supplied above the liquid level in the sealed container 280 during use. The portion of tubing 225 that extends into capsule 280 is relatively long, and in some instances, the inlet end of the tubing can touch the bottom of capsule 280. Further, optionally, in some examples, the respective sections of the gas delivery tube 205 and the infusion tube 225 from the top cover of the sealed container 280 to the housing 270 may be wrapped in the same tube sleeve, making the exemplary device 200 more compact in shape and further reducing the chance of failure.

Referring now to fig. 3, shown is a block diagram of an exemplary apparatus 300 in accordance with one implementation of the present invention.

The gas delivery tube 305, the switch 310, the pressure-relief valve 315, the barometer 320, the liquid delivery tube 325, and the housing 370 in fig. 3 may respectively correspond to the gas delivery tube 205, the switch 210, the pressure-relief valve 215, the barometer 220, the liquid delivery tube 225, and the housing 270 in fig. 2, and specifically refer to the details discussed above in conjunction with fig. 2, and therefore the repeated details are not repeated here. The various possible variations of the exemplary apparatus 200 of fig. 2 described above are equally applicable to the exemplary apparatus 300 described in connection with fig. 3.

As shown in fig. 3, in addition to the components described above, the example liquid filling apparatus 300 may also include a magnetic base 330. In some examples, the magnetic base 330 is secured within the housing 370, such as on a bottom surface of the housing 370, and an aperture is also provided in the housing 370 that accommodates the switch portion of the magnetic base 330. In use, by rotating the switch handle of the magnetic base 330 to the "on" position, the entire housing 370 can be attached to the surface of the operating platform or instrument housing containing ferromagnetic material, thereby effectively avoiding the device 300 from being displaced due to accidental touch during operation.

As can be seen from the detailed description in conjunction with fig. 2 and 3, the present invention provides exemplary liquid filling apparatuses 200 and 300 that are simple in construction and easy to operate. The example liquid filling apparatus 200 and 300 have no components that are more susceptible to wear or failure, and therefore have a longer service life and reduced use costs. Moreover, preferably, the major components of the example liquid filling apparatus 200 and 300 may each be contained within a housing, which may provide a more robust overall apparatus, further extending service life and reducing use costs. Additionally, the example liquid filling apparatus 200 and 300 do not require power on their own, and are suitable for use in some high safety demanding environments.

Next, an exemplary operation process of a liquid filling apparatus according to one implementation of the present invention is described with particular reference to a chip testing environment.

As mentioned above, one task in the chip testing process in the semiconductor manufacturing process is to detect whether the chip to be tested can achieve the specified function/performance at a specific temperature/temperature range, and the temperature control is usually achieved by filling the corresponding container/pipe of the chip testing apparatus with a liquid such as a cooling liquid or a heat-conducting liquid.

For the example of filling with cooling fluid, the cooling fluid is typically contained in a container (e.g., container 380 shown in fig. 3), which may be self-contained or commercially available. The container 380 is, for example, a bucket or a can, and the closure of the container 380 is achieved by an upper lid that mates with an opening at the top of the container 380. The cooling fluid will be poured into the target container 390 through an opening at the top of a cooling device container (e.g., container 390 shown in fig. 3) of the chip testing apparatus. Additionally, on some existing chip testing equipment, a compressed air output has been provided from which the compressed air required for the operation of a liquid filling device (e.g., device 300 shown in fig. 3) according to one implementation of the present invention can be obtained directly. Before starting to fill the cooling liquid, the preparation process comprises the following steps: connecting the air inlet end of the air pipe 305 of the device 300 with the compressed air output end of the chip testing equipment; the air outlet end of the air pipe 305 of the device 300 and the liquid inlet end of the infusion pipe 325 of the device 300 penetrate through the upper cover of the container 380 and are inserted into the container 380, and then the upper cover is tightly covered; the housing 370 of the device 300 is placed on the top surface of the cooling device container 390, then the switch of the magnetic base 330 of the device 300 is turned "on", the magnetic force generated by the magnetic base 330 causes the housing 370 to be attracted to the top surface of the cooling device container 390 to prevent the housing 370 from being moved randomly, and then the outlet end of the infusion tube 325 is inserted into the opening at the top of the cooling device container 390.

Next, by turning the switch 310 of the apparatus 300 to "on", compressed gas is supplied to the closed vessel 380 through the gas pipe 305 via the switch 310, the relief valve 315, and the barometer 320, and the coolant starts flowing from the closed vessel 380 to the target vessel 390 through the liquid pipe 325 by the pressure applied to the surface of the coolant in the closed vessel 380 by the supplied compressed air.

During the filling process, the operator can determine whether the air pressure in the air pipe 305/sealed container 380 is normal by observing the reading of the barometer 320. The operation of the device 300 can be stopped at any time by toggling the switch 310 of the device 300 to off, if desired. In addition, when the air pressure in the air pipe 305/the closed container 380 exceeds a certain threshold value, the pressure relief mechanism of the conduction pressure relief valve 315 is automatically opened to release the pressure outwards until the air pressure is reduced below the threshold value.

When an operator knows that the chiller tank 390 is full of coolant by observing a graduated float disposed near an opening at the top of the chiller tank 390, the operation of the device 300 can be stopped by toggling the switch 310 of the device 300 "off".

While the process of priming the cooling device container 390 of the chip testing apparatus with cooling fluid from the container 380 has been described in connection with the exemplary fluid priming device 300, it will be appreciated by those skilled in the art that priming thermally conductive fluid into the corresponding container of the chip testing apparatus may also be accomplished using the exemplary fluid priming device 300. Further, the processes described above may also be similarly implemented using the example liquid filling apparatus 200 described in detail in connection with fig. 2. By means of the liquid filling device 200 or 300, the working efficiency of the operator of the chip testing apparatus is improved, and the necessary downtime of the chip testing apparatus during filling of the cooling liquid or the heat transfer liquid is shortened.

Furthermore, although the operation of the exemplary liquid filling apparatus of one implementation of the present invention has been described above in connection with a chip testing environment, it will be understood by those skilled in the art that the present invention is not limited to the specific examples described above, but rather, the present invention may be widely applied to a variety of production/life scenarios where liquid filling is required.

Fig. 4 illustrates a block diagram of an exemplary system 400 in accordance with one implementation of the present invention.

As shown in fig. 4, the example system 400 may include a liquid filling apparatus 410 and a compressed air preparation apparatus 420. The liquid filling apparatus 410 may correspond to, for example, the liquid filling apparatus 200 described in conjunction with fig. 2, or the liquid filling apparatus 300 described in conjunction with fig. 3, and may specifically refer to what is discussed in detail in conjunction with fig. 2 and 3, and therefore repeated content is not described herein again. The compressed air preparation device 420 is used to provide compressed air, and in some examples, the compressed air preparation device 420 may be an air pump. The air outlet end of the compressed air preparation device 420 is communicated with the air inlet end of the air conveying pipe of the liquid filling device 410.

Some exemplary implementations of the present invention are described below.

The utility model discloses an in the scheme one, provide a liquid with filling device, liquid with filling device includes: the air pipe, wherein, supply the compressed air to the airtight container which holds liquid through the said air pipe; a switch arranged on the gas pipe for controlling the on/off of the gas pipe; the conduction relief valve is arranged on the gas conveying pipe and used for opening pressure relief when the gas pressure in the gas conveying pipe exceeds a certain threshold value; a barometer disposed on the gas delivery conduit for measuring a pressure of the gas in the gas delivery conduit; and a liquid transport tube, wherein the liquid in the closed vessel is supplied to a target vessel via the liquid transport tube by means of a pressure applied to a liquid surface in the closed vessel by the supplied compressed air.

In an alternative example of the first aspect (aspect two), the switch is a self-locking switch.

In an optional example of the first aspect (aspect three), the switch is a self-resetting switch.

In an alternative example of the first aspect (aspect four), the relief valve and the barometer are integrated into one component.

In an optional example (case five) of any one of the first to fourth cases, the liquid filling apparatus further includes a casing that accommodates at least the switch, the relief valve, and the barometer.

In an optional example (scheme six) of the scheme five, one or more vent holes are formed in the shell.

In an optional example of the fifth aspect (aspect seven), the liquid filling apparatus further includes a magnetic base.

In an optional example (scheme eight) of the fifth scheme, at least one section of the infusion tube is a metal hose, one end of the metal hose is a liquid outlet end of the infusion tube, and the other end of the metal hose is fixed on the shell.

In an alternative example of the eighth aspect (the ninth aspect), the other end of the metal hose is fixed to the housing by a threaded fastener.

In an alternative example (case ten) of the case one, the liquid is a cooling liquid.

In an alternative example of the first aspect (aspect eleven), the liquid is a heat-conductive liquid.

In an alternative example of aspect one (aspect twelve), the target container is part of a chip testing apparatus.

In a thirteenth aspect of the present invention, there is provided a system for filling liquid, the system comprising: a compressed air preparation device; and the liquid filling device in any one of the above schemes, wherein the air outlet end of the compressed air preparation device is communicated with the air inlet end of the air pipe of the liquid filling device.

What has been described above includes examples of the disclosed architecture. It is, of course, not possible to describe every conceivable combination of components and/or methodologies, but one of ordinary skill in the art may recognize that many further combinations and permutations are possible. Accordingly, the novel architecture is intended to embrace all such alterations, modifications and variations that fall within the spirit and scope of the appended claims.

Claims (13)

1. A liquid filling apparatus, comprising:

the air pipe, wherein, supply the compressed air to the airtight container which holds liquid through the said air pipe;

a switch arranged on the gas pipe for controlling the on/off of the gas pipe;

the conduction relief valve is arranged on the gas conveying pipe and used for opening pressure relief when the gas pressure in the gas conveying pipe exceeds a certain threshold value;

a barometer disposed on the gas delivery conduit for measuring a pressure of the gas in the gas delivery conduit; and

a liquid transport tube, wherein the liquid in the closed vessel is supplied to a target vessel via the liquid transport tube by means of a pressure applied to a liquid surface in the closed vessel by the supplied compressed air.

2. A liquid filling apparatus according to claim 1, wherein the switch is a self-locking switch.

3. The liquid filling apparatus of claim 1, wherein the switch is a self-resetting switch.

4. A liquid filling apparatus according to claim 1, wherein the pressure relief valve and the gas pressure gauge are integrated as one component.

5. A liquid filling apparatus according to any of claims 1-4, further comprising a housing containing at least the switch, the conduction relief valve and the gas pressure gauge.

6. A liquid filling apparatus according to claim 5, wherein the housing is provided with one or more vents.

7. The liquid filling apparatus of claim 5, further comprising a magnetic base.

8. The liquid filling apparatus of claim 5, wherein at least one segment of the liquid conveying tube is a metal hose, one end of the metal hose is a liquid outlet end of the liquid conveying tube, and the other end of the metal hose is fixed to the housing.

9. The liquid filling apparatus of claim 8, wherein the other end of the metal hose is secured to the housing by a threaded fastener.

10. The liquid filling apparatus of claim 1, wherein the liquid is a coolant.

11. The liquid filling apparatus of claim 1, wherein the liquid is a thermally conductive liquid.

12. The liquid filling apparatus of claim 1, wherein the target container is part of a chip testing device.

13. A system for filling a liquid, the system comprising:

a compressed air preparation device; and

liquid filling apparatus according to any one of the preceding claims,

the air outlet end of the compressed air preparation device is communicated with the air inlet end of the air conveying pipe of the liquid filling device.

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