CN215491957U - Liquid level detection device and negative oxygen ion generator - Google Patents

Abstract

The utility model provides a liquid level detection device and an oxygen anion generator. The liquid level detection device comprises a hollow pipe body, a metal piece and a response circuit, wherein at least part of the metal piece is arranged in a first cavity inside the hollow pipe body, the first cavity is provided with a first through hole communicated with liquid in a container and a second through hole communicated with air in the container, the inner diameter of the hollow pipe body is smaller than a set value, and the response circuit is used for being electrically connected with the metal piece and the liquid in the first cavity. The liquid level in the hollow pipe body can be detected by the embodiment of the utility model through the response circuit, the metal piece and the closed loop formed by the liquid in the hollow pipe body; through setting up the cavity body that the internal diameter is less than the setting value in the container that holds liquid, under the condition that liquid vibrates in the container, the internal liquid of hollow tube is less along with the range that outside liquid vibrates, consequently reflects the liquid level in the container comparatively accurate through the internal liquid level of detection hollow tube to the liquid level detection accuracy degree of vibrating liquid has been improved.

Description

Liquid level detection device and negative oxygen ion generator

Technical Field

The utility model relates to the field of liquid level detection, in particular to a liquid level detection device and a negative oxygen ion generator.

Background

The liquid level detection is used for measuring the height of liquid in the container, and specific liquid level detection's principle has the multiple, but relevant liquid level detection device all need the liquid position that awaits measuring in the container just can detect under the steady state, when the height of liquid is vibrate in the detection, the liquid level data that it detected can take place the sudden change along with the vibration of liquid, is unfavorable for the accurate liquid level data that vibrates liquid that detects.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a liquid level detection device and a negative oxygen ion generator to solve the technical problem of how to improve the accuracy of detecting the liquid level in the oscillation liquid.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

an embodiment of the present invention provides a liquid level detection apparatus for being disposed in a container that contains liquid, the liquid level detection apparatus including: the container comprises a hollow pipe body, a first cavity is arranged in the hollow pipe body, a first through hole communicated with the first cavity and the container is formed in the lower end of the hollow pipe body, a second through hole communicated with the first cavity and the container is formed in the side wall of the hollow pipe body, the ratio of the distance between the second through hole and the first through hole to the length of the hollow pipe body is larger than a first set value, and the inner diameter of the hollow pipe body is smaller than a second set value; a metallic piece at least partially disposed within the first cavity; one end of the response circuit is electrically connected with the metal piece, and the other end of the response circuit is used for being electrically connected with the liquid; wherein the response circuit is conductive when the liquid contacts the metallic member.

Further, the first set value is 0.9.

Further, the metalwork with the hollow pipe body interval sets up.

Furthermore, the metal pieces are arranged in a plurality, and the metal pieces are arranged in an insulating manner; the first end of each metal piece is located in the first cavity and arranged in a gradient mode in the extending direction of the hollow pipe body, and the second end of each metal piece is connected with the response circuit.

Further, the response circuit includes: a power source; the resistance detection piece is connected with the power supply; one end of the response circuit is electrically connected with the second ends of the metal pieces.

Further, the response circuit comprises a plurality of parallel circuits, one end of each parallel circuit is electrically connected with the second end of the corresponding metal piece, and the other end of each parallel circuit is used for being electrically connected with the liquid.

Further, the parallel circuit includes: a power source; and the conduction induction piece is electrically connected with the power supply and used for prompting the conduction state of the parallel circuit.

Further, a plurality of metal pieces are arranged at intervals; and/or the part of each metal piece close to the second end is covered with an insulating layer.

The embodiment of the utility model provides a negative oxygen ion generator, which comprises: the container is internally provided with a closed second cavity, and the second cavity is used for storing water; the liquid level detection device penetrates through the container and extends into the second cavity so as to detect the water level in the second cavity.

Further, a ratio of a cross-sectional area of the first cavity to a cross-sectional area of the second cavity is less than 0.25.

The liquid level detection device comprises a hollow pipe body, a metal piece and a response circuit, wherein the metal piece is at least partially arranged in a first cavity in the hollow pipe body, the first cavity is provided with a first through hole communicated with liquid in a container and a second through hole communicated with air in the container, the inner diameter of the hollow pipe body is smaller than a set value, and the response circuit is used for being electrically connected with the metal piece and the liquid in the first cavity. The liquid level in the hollow pipe body can be detected by the embodiment of the utility model through the response circuit, the metal piece and the closed loop formed by the liquid in the hollow pipe body; through setting up the cavity body that the internal diameter is less than the setting value in the container that holds liquid, under the condition that liquid vibrates in the container, the internal liquid of hollow tube is less along with the range that outside liquid vibrates, consequently reflects the liquid level in the container comparatively accurate through the internal liquid level of detection hollow tube to the liquid level detection accuracy degree of vibrating liquid has been improved.

Drawings

FIG. 1 is a schematic structural diagram of a liquid level detection apparatus provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a response circuit according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a response circuit according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of a response circuit according to another embodiment of the present invention;

fig. 5 is a schematic structural diagram of an oxygen anion generator according to an embodiment of the present invention.

Description of reference numerals:

1. a container; 11. an air inlet pipe; 12. an air outlet pipe; 13. a fixing member; 14. a connecting member; 15. a seal member; 1a, a second cavity; 20. a liquid level detection device; 2a, a first cavity; 2b, a first through hole; 21. a hollow tube body; 22. a metal member; 23. a response circuit; 23a, a resistance detection member; 23b, a conduction induction piece; 24. a parallel circuit.

Detailed Description

Various combinations of the specific features in the embodiments described in the detailed description may be made without contradiction, for example, different embodiments may be formed by different combinations of the specific features, and various possible combinations of the specific features in the present invention will not be further described in order to avoid unnecessary repetition.

The individual features described in the embodiments can be combined in any suitable manner without departing from the scope, for example different embodiments and aspects can be formed by combining different features. In order to avoid unnecessary repetition, various possible combinations of the specific features of the utility model will not be described further.

In the following description, the term "first/second/so" is used merely to distinguish different objects and does not mean that there is a common or relationship between the objects. It should be understood that the description of the "upper", "lower", "outer" and "inner" directions as related to the orientation in the normal use state, and the "left" and "right" directions indicate the left and right directions indicated in the corresponding schematic drawings, and may or may not be the left and right directions in the normal use state.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The liquid level detection device can be applied to various scenes in which the height of liquid in a container containing the liquid needs to be detected; a scene comprising a container being an open container or a container being a closed non-open container; including scenes in which the material of the container is metallic or non-metallic; including situations where the container is a mixture of liquid and other substances or where only liquid is present in the container. The liquid may include various types, may be water, or various solutions, among others. Those skilled in the art should understand that the kind of liquid contained in the container and the function and structure of the container are not limited to the structure of the liquid level detection device.

The following describes a specific structure of the liquid level detection apparatus according to the embodiment of the present invention. As shown in fig. 1, the liquid level detection device is adapted to be at least partially disposed in a container 1 containing a liquid for detecting a level of the liquid in the container 1. The liquid level detection device in the embodiment of the present invention includes a hollow tube body 21, a metal member 22, and a response circuit 23. Specifically, the inside first cavity 2a that is equipped with of hollow tube body 21, the lower extreme of hollow tube body 21 are equipped with the first through-hole 2b of first cavity 2a of intercommunication and container 1, and first through-hole 2b is used for leading to the liquid in the container 1 to first cavity 2a in, and the lower extreme of hollow tube body 21 can be the cavity tube body 21's of liquid level detection device under normal use state below. The lateral wall of the hollow pipe body 21 is provided with a second through hole 2c communicating the first cavity 2a and the container 1, and the second through hole 2c is used for communicating the gas in the container 1 with the gas in the first cavity 2a, so that the gas pressure in the first cavity 2a and the container 1 is balanced. The second through-hole 2c is located as far away from the lower end of the hollow tube body 21 as possible; specifically, the ratio of the distance between the second through hole 2c and the first through hole 2b to the length of the hollow tube 21 is greater than a first set value, and the distance between the first through hole 2b and the second through hole 2c may be the distance from the end face of the first through hole 2b to the axis of the second through hole 2 c. Since the second through hole 2c is disposed on the hollow tube 21, the distance between the first through hole 2b and the second through hole 2c is smaller than the length of the hollow tube 21, and thus the first set value is smaller than 1. In a normal use state, the hollow tube 21 may be provided entirely in the container 1, or a portion near the lower end may be provided in the container 1 and a portion near the upper end may protrude outside the container 1. The hollow pipe body 21 can be a slender hollow column, and the ratio of the length to the inner diameter of the slender hollow pipe body is more than 3; the cross-sectional shape and area (cross-sectional area perpendicular to the longitudinal direction of the hollow tube 21) of the first cavity 2a in the hollow tube 21 may be the same or different; in the case where the first cavity 2a is a cylindrical space, the inner diameter of the hollow tube body 21 is the radius of any cross section of the first cavity 2 a; in the case that the first cavity 2a is not a cylindrical space, the first cavity may be converted into a cylindrical standard cavity having the same length as the first cavity, and the inner diameter of the hollow tube 21 is the radius of any cross section of the cylindrical standard cavity. The first cavity 2a of the hollow tubular body 21 is in communication with the container 1 requiring the provision of a corresponding first through hole 2 b. The inner diameter of the hollow tube body 21 is smaller than a second set value, which may be 1 cm. In one embodiment, the inner diameter of the hollow tube 21 is set to 0.4 cm. Alternatively, the thickness of the hollow tube 21 may or may not vary along the length direction (the up-down direction shown in fig. 1) of the hollow tube 21, and for convenience of processing, the thickness is preferably constant along the length direction.

In one embodiment, as shown in fig. 1, the ratio of the distance between the second through holes 2c and the first through holes 2b to the length of the hollow tube 21 is greater than a first predetermined value, which may be 0.9. Optionally, the ratio of the distance between the second through holes and the first through holes to the length of the hollow tube body is 0.95. The second through hole is arranged far away from the first through hole as far as possible, the risk that the second through hole is sealed due to the fact that the second through hole is covered by the detection liquid can be reduced, and the risk that the air pressure of the first cavity and the air pressure of the container are unbalanced is further reduced.

Under the condition of liquid level in liquid level detection device detection container 1, liquid in container 1 passes through second through-hole 2b and gets into first cavity 2a, because first through-hole 2c has communicated the gas between first cavity 2a and the container 1, therefore atmospheric pressure in first cavity 2a equals with atmospheric pressure in the container 1, in the steady state of liquid level in container 1, liquid level in the container 1 equals with the liquid level in first cavity 2a, because the internal diameter of hollow body 21 is less than the setting value, make under the condition that the liquid in the container 1 vibrates, the internal diameter of hollow body 21 is less, the range that liquid can vibrate in first cavity 2a is less relatively, make the liquid in first cavity 2a comparatively more steady, the difficult sudden change that takes place of data that the detection liquid level process obtained, improve the degree of accuracy of liquid level detection. The liquid level of the oscillation liquid in the container can be obtained by detecting the liquid level in the first cavity.

According to the embodiment of the utility model, the hollow pipe body with the inner diameter smaller than the set value is arranged in the container for containing the liquid, and under the condition that the external liquid is vibrated, the vibration amplitude of the liquid in the hollow pipe body along with the external liquid is smaller, so that the liquid level in the hollow pipe body is more stable, and the accuracy for detecting the liquid level in the hollow pipe body is more accurate compared with the accuracy for directly detecting the liquid level of the vibrated liquid in the container.

In some embodiments, the hollow tubular body may be a thin-walled tubular body. Specifically, the ratio of the outer diameter to the inner diameter of the hollow tube 21 is smaller than a third preset value, for example, the third preset value may be 2; the outer diameter may be determined in a manner similar to that of the inner diameter described above; when the hollow pipe body 21 is a cylinder, the outer diameter of the hollow pipe body 21 is the radius of the outer ring of any cross section of the hollow pipe body 21; in the case where the hollow pipe body 21 is not a cylinder, the hollow pipe body 21 may be converted into a hollow cylinder having the same length, and the outer diameter of the hollow pipe body 21 is the size of the radius of the outer ring of any cross section of the hollow cylinder. Under the certain circumstances of cavity body internal diameter, the external diameter of cavity body is less for the volume of cavity body reduces, inserts the volume of liquid through reducing the cavity body, thereby has reduced the cavity body and has brought the influence that the liquid level riseed because of getting into liquid, and then has improved the accuracy that the liquid level detected.

In some embodiments, as shown in fig. 1, the length direction of the hollow pipe 21 is consistent with the height direction (the up-down direction shown in fig. 1) of the container 1, the first through hole 2b of the hollow pipe 21 is arranged at one end (the lower end shown in fig. 1) of the hollow pipe 21 close to the bottom of the container 1, and the first cavity 2a can communicate with the liquid at a lower liquid level in the container 1 by arranging the first through hole 2b as close to the bottom of the container 1 as possible, so that the detectable range of the liquid level is expanded. The angle arrangement of the hollow pipe body and the height direction of the container in the embodiment of the utility model does not influence the liquid level detection device to realize the function of detecting the liquid level in the container. For example, in other embodiments, the hollow tube body can be arranged at a set included angle with the height direction of the container, and only by arranging a second through hole 2c communicated with the container on the hollow tube body, the liquid can be circulated into the first cavity by utilizing the atmospheric pressure principle, and the liquid level in the first cavity is detected, so that the detection of the liquid level in the container is realized.

As shown in fig. 1, the liquid level detection device further comprises a metal piece 22 and a response circuit 23. The metal pieces 22 may be one or more than one. The metal piece 22 may be partially disposed in the first cavity 2a, or the metal piece 22 may be entirely disposed in the first cavity 2a, and the metal piece 22 refers to an object having a conductive property. The shape of the metal member 22 is not limited in the embodiments of the present invention, and the metal member 22 may be a wire having a cross-sectional area smaller than a certain value in a length extending direction thereof. Specifically, the metal member 22 may be a conductive steel wire having strong rust preventive properties. The metal member 22 is electrically connected to one end of the response circuit 23, and the other end of the response circuit 23 is used for electrically connecting to the liquid. The electrical connection may be through a tight arrangement, with conduction achieved in direct contact; or the electric connection can be realized through the conducting wire under the condition of arranging a certain distance. Optionally, one end of the response circuit 23 may be connected to the metal member 22 through a wire, or may be in close contact with the metal member to achieve electrical conduction; the other end of the response circuit 23 and the other end of the metal piece 22 can be arranged at intervals, and under the condition that liquid is in contact with the metal piece 22, the liquid with the conductive property connects the metal piece 22 and the response circuit 23, so that the response circuit 23 is conducted, and the liquid level condition can be judged according to whether the response circuit is conducted or the relevant circuit parameters conducted in the response circuit.

The liquid level in the hollow pipe body can be detected by the embodiment of the utility model through the response circuit, the metal piece and the liquid in the hollow pipe body to form a closed loop. Through setting up the hollow pipe body that the internal diameter is less than the setting value in the container that holds liquid, under the condition that liquid vibrates in the container, the internal liquid of hollow pipe is less along with the range that outside liquid vibrates to it is comparatively accurate to measure the liquid level in the container with the internal liquid level of hollow pipe, has consequently improved the liquid level detection degree of accuracy that vibrates liquid.

In some embodiments, the response circuit may be entirely disposed in the first cavity and integrated with the liquid level detection device, or partially disposed in the first cavity and coated by the related joint to form a closed product, thereby improving the safety of the liquid level detection device; the response circuit may also be disposed entirely outside the first cavity. The position relation between the response circuit and the hollow tube body in the embodiment of the utility model does not influence the function of the response circuit for electrically connecting the metal piece and the liquid.

In some embodiments, the fluid level condition may be obtained by responding to whether the circuit is conducting. For example, when the response circuit is turned on, it indicates that the metal piece and the response circuit are electrically connected through liquid, so that the current liquid level is known to be greater than or equal to the minimum distance between the current metal piece and the bottom of the container, and when the minimum distance between the metal piece and the bottom of the container is known, the range in which the liquid level is located can be obtained. In another embodiment, the fluid level condition may be determined by responding to relevant circuit parameters detected in the circuit, including but not limited to resistance values, voltage values, and the like. For example, the metal piece is connected to different liquid levels, the resistance value in the response circuit is different, and the liquid level condition in the container can be obtained by detecting the change condition of the resistance value in the response circuit.

In some embodiments, as shown in fig. 1, in the case where the metal member 22 is provided in plurality, the plurality of metal members 22 are provided with insulation therebetween. The insulation may be to isolate the metal members 22 from each other or to wrap the insulating material so as not to interfere with each other, so that the metal members 22 are not electrically conductive. Specifically, a plurality of metal pieces can be arranged at intervals, and contact conduction is avoided in an interval mode through the metal pieces, so that the metal pieces can be independently communicated with the response circuit. A first end (a lower end in fig. 1) of each metal member 22 is located in the first cavity 2a, and the other end opposite to the first end of the metal member 22 is a second end of the metal member 22, and the second end may be disposed in the first cavity, and the second end may also be disposed outside the first cavity. In another embodiment, an insulating layer may be further coated on a portion of each metal part near the second end to achieve insulation between the plurality of metal parts, specifically, the portion of the metal part near the second end may be formed by coating the metal part with the insulating layer starting from the first end, and the coated length may account for more than 70% of the length of the metal part, and specifically, the coated length may be set to 95% of the length of the metal part. So that the uncoated part is available for contact with liquid and the metal pieces of the coated part can be arranged closely to reduce the space required for installation.

In some embodiments, as shown in fig. 1, the first ends of the metal pieces 22 are arranged in a gradient manner in the length extending direction (the up-down direction in fig. 1) of the hollow tube 21, and the gradient arrangement may be that the first ends are arranged in sequence at certain intervals in the extending direction of the hollow tube 21. According to the embodiment of the utility model, the first ends of the metal pieces are arranged in the extending direction of the hollow pipe body in a gradient manner, and the second end of each metal piece is connected with the response circuit, so that the parallel connection of the metal pieces and the response circuit is realized. The corresponding liquid level can be judged by detecting the response condition of a single metal piece and the position of the second end, and the liquid level in the first cavity can also be judged by detecting resistance data connected in parallel to the response circuit.

In some embodiments, as shown in FIG. 2, the response circuit 23 includes a power source U and a resistance sensing element 23 a. The resistance detection element 23a is connected to a power source U, the power source U is used for providing energy required by the resistance detection element 23a, the resistance detection element 23a is used for detecting a resistance value in a loop of the response circuit 23, and one end of the response circuit 23 is electrically connected to the second ends of the plurality of metal elements 22. Specifically, the first ends of the metal pieces are arranged in a gradient mode in the extending direction of the hollow pipe body, the second end of each metal piece is connected with the response circuit, when the first ends of the metal pieces are in contact with liquid, the corresponding metal pieces are conducted with the response circuit, along with the rising of the liquid level, the number of the metal pieces conducted with the response circuit is larger, the number of resistors connected in parallel to the response circuit is larger, the total resistance value in the response circuit is smaller, the resistance value detected by the resistance detection piece arranged in the main circuit of the response circuit is smaller, the number of the metal pieces connected into the response circuit can be obtained according to the resistance value detected by the resistance detection piece, and the liquid level in the second cavity can be obtained according to the number of the metal pieces connected into the response circuit.

In some embodiments, as shown in fig. 3, the response circuit 23 includes a plurality of parallel circuits 24, one end of each parallel circuit 24 is electrically connected to the second end of a corresponding one of the metal pieces 22, and the other end of each parallel circuit 24 is used for electrically connecting to the liquid. The other end of the optional parallel circuit 24 may be directly connected to the hollow tube 21 having conductive properties. By providing a plurality of parallel circuits 24, it is possible to respond individually to a signal after each metal element 22 is turned on. Meanwhile, damaged parts in each parallel circuit are conveniently replaced, and the maintenance cost is reduced.

In some embodiments, as shown in fig. 3, the parallel circuit 24 includes a power source U and a conduction sensing piece 23 b. The conduction sensing member 23b is electrically connected to the power supply U and is used to indicate the conduction state of the parallel circuit 24. The power source U may be provided in plural, and plural power sources U are individually provided in each of the parallel circuits 24. The conduction sensing member 23b includes a signal lamp, an alarm, and the like, which are responsive to an acousto-optic signal perceptively sensed.

In some embodiments, as shown in fig. 4, one power source U may be provided, one power source U is connected to a plurality of parallel circuits 24, and one resistance detection element 23a may be provided to be connected to the power source, and by connecting the conduction sensing element 23b to a branch of the metal element 22 connected to the response circuit 23, when the metal element 22 is connected to the response circuit 23, the conduction sensing element 23b correspondingly sends a signal to prompt that a set liquid level is reached, or a precise liquid level is obtained through detection and analysis by the resistance detection element.

The embodiment of the utility model also discloses a negative oxygen ion generator. As shown in fig. 5, the negative oxygen ion generator can be regarded as a closed hollow container 1, the second cavity 1a inside the container holds water, compressed air is introduced into the second cavity 1a from the air inlet pipe 11, the compressed air impacts water in the second cavity 1a to generate a gas-water mixture containing a large number of bubbles, kinetic energy formed by the compressed air acts on water molecules in the water to break the water molecules and crack the water molecules into positive and negative oxygen ions, and the negative oxygen ions are combined with the air to form negative oxygen ion gas, so that the gas-water mixture contains a large number of negative oxygen ions, and the negative oxygen ion gas is led out through the air outlet pipe 12. During the process of impacting water by compressed air, the water in the negative oxygen ion generator can vibrate. The negative oxygen ion generator in the embodiment of the present invention further includes the liquid level detection device 20 in any one of the above embodiments. The container 1 is internally provided with a closed second cavity 1a, the closed second cavity 1a can be of a non-open structure, and the closed second cavity 1a can be communicated with the outside by arranging an air inlet pipe 11 and an air outlet pipe 12. The second cavity 1a is used for storing water. The liquid level detection device 20 is used for detecting the height of water in the second cavity 1a, the liquid level detection device 20 penetrates through the container 1 and extends into the second cavity 1a, the liquid level detection device 20 can be partially arranged in the second cavity 1a, and the liquid level detection device 20 can also be completely arranged in the second cavity. Alternatively, one end of the liquid level detection device 20 is connected to the container 1, and the other end opposite to the one end is inserted into the second cavity 1 a. According to the embodiment of the utility model, the hollow pipe body with the inner diameter smaller than the set value is arranged in the negative oxygen ion generator, the water in the second cavity is in a vibration state under the working state of the negative oxygen ion generator, the vibration amplitude of the water in the hollow pipe body along with the external liquid is smaller, and the water level in the negative oxygen ion generator is obtained by detecting the height of the water in the hollow pipe body, so that the detection interference degree of the vibration water level in the negative oxygen ion generator is reduced.

In some embodiments, as shown in fig. 5, the negative oxygen ion generator further comprises a fixing member 13, the fixing member 13 is provided with a through hole penetrating at least one end of the fixing member 13, and the response circuit can be arranged in the through hole, thereby improving the compactness of the liquid level detection device. The first end of the hollow pipe body penetrates through the through hole and is fixed with the fixing piece. The hollow tube is disposed in the second cavity, the fixing member 13 penetrates the container, and the outer side of the fixing member 13 is in threaded connection with the connecting member 14. The optional fixing member 13 is provided with external threads on the outer side thereof, and the inner wall of the connecting member 14 is provided with internal threads, and the fixing member 13 and the connecting member 14 are engaged with each other through the internal threads and the external threads. Alternatively, the connecting member 14 abuts against the surface of the container 1 and is threadedly connected to the hollow tube body or the fixing member.

In some embodiments, the oxygen anion generator further comprises a seal. The sealing member is used for tightly connecting the hollow pipe body and the container. Alternatively, as shown in fig. 5, in the case where the fixing member 13 is provided, the sealing member 15 is used to tightly connect the fixing member 13 with the container 1. The tight connection can be realized by arranging a sealing part to isolate the gap between the container and the hollow pipe body or the fixing part, so that the risk that water in the container flows out from the gap is reduced.

In some embodiments, as shown in fig. 5, the ratio of the cross-sectional area of the first cavity 2a to the cross-sectional area of the second cavity 1a is less than 0.25, and the ratio of the cross-sectional area of the first cavity 2a to the cross-sectional area of the second cavity 1a may be 0.1. In the case where the hollow tubular body and the container are standard cylinders, the cross-sectional area refers to the cross-sectional area of the object in the direction of extension. In the case where the hollow tubular body and the container are non-standard cylinders, the cross-sectional area refers to the smallest cross-sectional area of the object in the direction of extension. The cross-sectional area of the first cavity and the cross-sectional area of the second cavity are smaller than a set value, so that the interference of the hollow pipe body with the oscillating water level in the container is reduced, and the accuracy of water level detection in the negative oxygen ion generator is improved.

In some embodiments, the hollow tube body is disposed in a direction of a center line of the second cavity. As shown in fig. 5, the center line of the second cavity 1a may be a line of the geometric center of the container in the height extending direction. The water level on the central line direction of second cavity 1a vibrates the water level that the range vibrates the edge of relative second cavity and vibrates the range and want little, consequently through setting up the hollow body on the central line direction of second cavity, reduces the range that the internal water level of hollow tube vibrates, reduces the internal water level of hollow tube and receives the degree of disturbing, and then has promoted the degree of accuracy that detects the water level that vibrates among the negative oxygen ion generator.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

1. A liquid level detection device for being disposed in a container containing a liquid, comprising:

the container comprises a hollow pipe body, a first cavity is arranged in the hollow pipe body, a first through hole communicated with the first cavity and the container is formed in the lower end of the hollow pipe body, a second through hole communicated with the first cavity and the container is formed in the side wall of the hollow pipe body, the ratio of the distance between the second through hole and the first through hole to the length of the hollow pipe body is larger than a first set value, and the inner diameter of the hollow pipe body is smaller than a second set value;

a metallic piece at least partially disposed within the first cavity;

one end of the response circuit is electrically connected with the metal piece, and the other end of the response circuit is used for being electrically connected with the liquid;

wherein the response circuit is conductive when the liquid contacts the metallic member.

2. The fluid level detection apparatus of claim 1, wherein the first set point is 0.9.

3. The fluid level detection device of claim 1, wherein the metal member is spaced from the hollow tube.

4. The liquid level detection device according to claim 1 or 3, wherein the metal members are arranged in a plurality, and the metal members are arranged in an insulating manner; the first end of each metal piece is located in the first cavity and arranged in a gradient mode in the extending direction of the hollow pipe body, and the second end of each metal piece is connected with the response circuit.

5. The fluid level detection apparatus of claim 4, wherein the response circuit comprises:

a power source;

the resistance detection piece is connected with the power supply;

one end of the response circuit is electrically connected with the second ends of the metal pieces.

6. The apparatus of claim 4, wherein the response circuit comprises a plurality of parallel circuits, one end of each parallel circuit being electrically connected to the second end of a corresponding one of the metallic members, the other end of each parallel circuit being adapted to be electrically connected to the liquid.

7. The fluid level detection apparatus of claim 6, wherein the parallel circuit comprises:

a power source;

and the conduction induction piece is electrically connected with the power supply and used for prompting the conduction state of the parallel circuit.

8. The liquid level detection device of claim 4, wherein a plurality of the metal pieces are arranged at intervals;

and/or the presence of a gas in the gas,

a portion of each of the metal pieces near the second end is covered with an insulating layer.

9. An oxygen anion generator, comprising:

the container is internally provided with a closed second cavity, and the second cavity is used for storing water;

the fluid level detection device of any one of claims 1-8, extending through the container into the second cavity to detect a level of fluid in the second cavity.

10. The oxygen anion generator of claim 9, wherein a ratio of a cross-sectional area of the first cavity to a cross-sectional area of the second cavity is less than 0.25.

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