Level detection device and system for viscous liquids

Abstract

This application relates to a liquid level detection device and system for viscous liquids. The detection device includes a storage container, a float, and a detection switch. The storage container has a storage chamber, a detection chamber communicating with the storage chamber, a filling port, and a discharging port. The viscous liquid is added to the storage chamber through the filling port and discharged to the target position through the discharging port. The float is installed in the detection chamber and rises or falls with the liquid level of the viscous liquid in the detection chamber. A detection switch is located at a height near the bottom of the detection chamber. When the remaining viscous liquid in the storage chamber is insufficient, the float falls into the detection area of ​​the detection switch. The detection switch outputs a low liquid signal, driving a relevant liquid replenishment device to replenish the liquid or triggering a prompt signal to inform the user to replenish the liquid in time. This application avoids the situation where the float's action is slow due to the high viscosity and poor flowability of the liquid, resulting in inaccurate detection results.

Description

Technical Field

[0001] This application relates to the field of liquid level detection technology, and in particular to a liquid level detection device and system for viscous liquids. Background Technology

[0002] Typical liquid level detection devices use a float and a magnetic detection switch to detect liquid volume. The float contains a magnetic element, and its density is less than the liquid density. As the liquid level changes, the float moves accordingly. A magnetic detection switch is installed at a designated location, with the float within its sensing area. The switch detects the float's magnetic signal. This structure is typically used to detect low liquid levels and remaining liquid, indicating when liquid is low and needs to be added. The magnetic detection switch's sensing of the float provides timely and effective feedback on liquid level and remaining liquid. However, for liquids with higher viscosity, due to the poor flowability, the float may become completely submerged, resulting in a slow response. This can lead to situations where the liquid level is full but the indicator still prompts for adding more liquid, or the indicator disappears after a delay, failing to promptly reflect the need for liquid replenishment. Utility Model Content

[0003] Therefore, it is necessary to address the aforementioned problems with liquid level detection devices for viscous liquids, and to provide a liquid level detection device and system for viscous liquids.

[0004] This application discloses a liquid level detection device for a viscous liquid, comprising a liquid storage container, a liquid storage chamber disposed therein, and a detection chamber, a liquid inlet, and a liquid outlet communicating with the liquid storage chamber. The liquid outlet is located at the bottom of the liquid storage chamber, and the liquid storage chamber is used to store the viscous liquid.

[0005] A float, wherein the float is a hollow structure and is movably disposed within the detection cavity;

[0006] A detection switch is provided at a height near the bottom of the detection chamber. The detection switch is used to check whether the float has fallen to the bottom of the detection chamber. When the float falls to the bottom of the detection chamber and is within the detection area of ​​the detection switch, the detection switch sends a low-liquid signal.

[0007] The first aspect of this application discloses a liquid level detection device for viscous liquids, comprising a storage container, a float, and a detection switch. The storage container has a storage chamber, a detection chamber connected to the storage chamber, a filling port, and a discharging port. The user can add viscous liquid to the storage chamber through the filling port, and the storage container can discharge the liquid to a target position through the discharging port. The float is installed in the detection chamber and rises or falls with the liquid level in the detection chamber. A detection switch is located near the bottom of the detection chamber. When the remaining viscous liquid in the storage chamber is insufficient, the float falls into the detection area of ​​the detection switch. At this time, the detection switch outputs a low-liquidity signal to drive a relevant liquid replenishment device to replenish the liquid or triggers a prompt signal to inform the user to replenish the liquid in time. By making the float a hollow structure, in conjunction with the detection switch, this application avoids the situation where the float is completely immersed in the liquid due to the high viscosity and poor fluidity of the liquid, resulting in slow float response, delayed prompts for adding liquid even after the liquid is full, or delayed disappearance of the prompt, failing to promptly reflect the liquid addition status.

[0008] In one embodiment, the detection switch includes a signal transmitting unit and a signal receiving unit. The signal transmitting unit and the signal receiving unit are externally disposed in the detection cavity and horizontally distributed at opposite ends of the bottom of the detection cavity. The signal transmitting unit is configured to emit a light beam, and the signal receiving unit is configured to receive the light beam. When the float falls to the bottom of the detection cavity, the float blocks the light beam emitted by the signal transmitting unit from being transmitted to the signal receiving unit.

[0009] The liquid level detection device for viscous liquid in the above embodiments further defines the detection switch to detect whether the float has descended to the bottom of the detection chamber by emitting a light beam and receiving the blocked light signal, thereby determining the amount of viscous liquid remaining in the storage chamber. Through the cooperation between the signal transmitting unit, the signal receiving unit and the float, the detection device of this application has a simple structure and is sensitive and reliable in operation.

[0010] In one embodiment, when the bottom of the float abuts against the bottom of the detection chamber, the float at least partially falls into the detection area of ​​the detection switch.

[0011] The liquid level detection device for viscous liquid in the above embodiment further specifies that when the bottom of the float comes into contact with the bottom of the storage chamber, it indicates that the viscous liquid stored in the storage chamber is almost consumed. When the bottom of the float comes into contact with the bottom of the storage chamber, part of the float falls into the detection area of ​​the detection switch, thereby triggering the detection switch to output a liquid shortage signal. This avoids the detection switch from being missed due to the float being too small and sinking to the bottom of the detection chamber just falling into the gap between the bottom of the detection chamber and the detection area.

[0012] In one embodiment, the detection chamber is distributed along the height direction of the liquid storage container. The detection chamber has a cavity connection port and a vent port at its two ends from bottom to top. The detection chamber can be connected to the liquid storage chamber through the cavity connection port or the vent port. The horizontal height of the vent port on the liquid storage chamber is greater than the horizontal height of the liquid filling port on the liquid storage chamber.

[0013] The liquid level detection device for viscous liquid in the above embodiments further defines that the detection chamber is provided with a vent, and the horizontal height of the vent in the liquid storage chamber is greater than that of the liquid filling port in the liquid storage chamber. Even if the viscous liquid added to the liquid storage chamber is momentarily higher than the height of the liquid filling port, it will not obstruct the communication between the vent and the outside atmosphere, ensuring that the liquid level in the detection chamber changes with the liquid level in the liquid storage chamber after the liquid level in the liquid storage chamber exceeds the cavity connection port.

[0014] In one embodiment, the detection chamber can be divided into an interconnected active channel and a venting channel from bottom to top. The diameter of the active channel is larger than the diameter of the float, and the diameter of the float is larger than the diameter of the venting channel. The venting channel has a vent at one end away from the active channel, and the horizontal height of the active channel on the liquid storage chamber is lower than the horizontal height of the liquid filling port on the liquid storage chamber.

[0015] The liquid level detection device for viscous liquids in the above embodiments further defines the dimensional relationship between the float diameter, the venting channel diameter, and the moving channel diameter. This limits the float's range of motion within the detection chamber, preventing the float from rising too high and taking too long to descend, which could lead to insufficient liquid level and prevent the detection switch from outputting a low-liquid signal in time. Furthermore, by making the float diameter smaller than the venting channel diameter, the device prevents the float from crossing the venting channel and entering the storage chamber, thus preventing detection failure.

[0016] In one embodiment, the liquid storage container includes a container body and a partition. The partition is installed inside the container body and divides the space inside the container body into a liquid storage chamber and a detection chamber. The upper end of the partition forms the venting channel with the container body, and the lower end of the partition forms the moving channel with the container body.

[0017] In one embodiment, the cavity wall of the active channel is provided with a plurality of protruding and spaced-apart anti-sticking ribs.

[0018] The liquid level detection device for viscous liquid in the above embodiments further defines that multiple anti-sticking ribs are provided on the movable channel. These multiple anti-sticking ribs protrude from the cavity wall and are spaced apart. Based on the above design, the contact area between the float and the cavity wall of the movable channel is reduced, avoiding the situation where the viscous liquid remaining on the cavity wall sticks to the float and cannot move due to the excessive contact area between the float and the cavity wall of the movable channel, thus causing the liquid level detection function to fail.

[0019] In some embodiments, the bottom of the liquid storage chamber is inclined upwards in all directions around the liquid outlet, and the detection chamber is located away from the liquid outlet.

[0020] The liquid level detection device for viscous liquid in the above embodiment further defines the bottom of the liquid storage chamber as inclined upwards from the liquid outlet, so that when the remaining amount of viscous liquid in the liquid storage chamber is low, it can still slide down to the liquid outlet by its own weight along the inclined path.

[0021] In one embodiment, the detection device further includes a prompting device electrically connected to the detection switch. The prompting device is used to receive the low-liquidity signal and issue a prompting signal, which includes one or a combination of sound, light, or information push.

[0022] The liquid level detection device for viscous liquid in the above embodiments is further defined as having a prompting device. When the detection switch triggers and outputs a low liquid signal, the prompting device can issue one or a combination of prompting signals, such as sound, light, or information push, to remind the user to replenish the liquid in time.

[0023] The second aspect of this application provides a liquid level detection system for viscous liquids, the system comprising a controller and a liquid level detection device for viscous liquids as described above; the controller is electrically connected to the detection switch and the indicator device respectively, the controller is used to convert the received liquid shortage signal and output a control signal to the indicator device to control the indicator device to output an indicator signal. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a liquid level detection device for a viscous liquid in one embodiment.

[0025] Figure label:

[0026] 10 Liquid storage container, 11 Container body, 12 Partition, 121 First connecting plate, 122 Second connecting plate, 123 Third connecting plate, 101 Liquid storage chamber, 102 Detection chamber, 103 Liquid filling port, 104 Liquid outlet, 105 Vent port, 106 Vent channel, 107 Chamber connection port, 108 Movable channel, 110 Anti-sticking rib;

[0027] 20 Detection switch, 21 Signal transmitting unit, 22 Signal receiving unit;

[0028] 30 floats. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0031] like Figure 1 As shown, this embodiment provides a liquid level detection device for viscous liquids, including:

[0032] The liquid storage container 10 has a liquid storage chamber 101 inside, as well as a detection chamber 102, a liquid inlet 103 and a liquid outlet 104 connected to the liquid storage chamber 101. The liquid outlet 104 is located at the bottom of the liquid storage chamber 101. The liquid storage chamber 101 is used to store viscous liquid.

[0033] The float 30 has a hollow structure and is movably disposed within the detection cavity 102;

[0034] The detection switch 20 is set at a height near the bottom of the detection chamber 102. The detection switch 20 is used to check whether the float 30 falls to the bottom of the detection chamber 102. When the float 30 falls to the bottom of the detection chamber 102 and is within the detection area of ​​the detection switch 20, the detection switch 20 sends a low liquid signal.

[0035] The liquid storage container 10 can be, but is not limited to, a metal or non-metal shell structure. For example, the liquid storage container 10 can be a plastic shell structure. The liquid storage container 10 can be divided into a storage chamber 101 and a detection chamber 102. The storage chamber 101 can be provided with a filling port 103 and a dispensing port 104. The storage chamber 101 can store viscous liquids such as dish soap, hand sanitizer, and shower gel. Users can add viscous liquids to the storage chamber 101 through the filling port 103, and the viscous liquids in the storage chamber 101 can be discharged to the target location through the dispensing port 104. Since the storage chamber 101 and the detection chamber 102 are interconnected, a portion of the viscous liquid in the storage chamber 101 enters the detection chamber 102.

[0036] The float 30 can be a hollow shell structure with a density lower than that of the viscous liquid. For example, the float 30 can be a cylindrical shell structure made of PP material. The float 30 can move within the detection chamber 102. Specifically, when the viscous liquid in the storage chamber 101 increases, the viscous liquid in the detection chamber 102 also increases, and the float 30 rises as the viscous liquid in the detection chamber 102 increases; conversely, when the viscous liquid in the storage chamber 101 is gradually consumed, the viscous liquid in the detection chamber 102 decreases, and the float 30 descends as the viscous liquid in the detection chamber 102 decreases. It should be noted that the float 30 can also be made of corrosion-resistant stainless steel or other alloy materials. In addition, the shape of the float 30 is not limited to cylindrical; it can also be spherical, elliptical, etc.

[0037] The detection switch 20 can be used to detect whether the float 30 has fallen into the detection area of ​​the detection switch 20. Specifically, based on the height of the detection switch 20 near the bottom of the detection chamber 102, when the remaining viscous liquid in the storage chamber 101 is insufficient, the float 30 descends to the bottom of the detection chamber 102 and falls into the detection area of ​​the detection switch 20. At this time, it can be determined that the remaining viscous liquid in the storage chamber 101 is insufficient and needs to be replenished. The detection switch 20 generates a low-liquidity signal to drive the relevant replenishment device to replenish the liquid or trigger a prompt signal to inform the user to handle the situation in time. Furthermore, after replenishing the storage chamber 101, the float 30 gradually rises and moves away from the detection area as the viscous liquid increases, and the detection switch 20 stops outputting the low-liquidity signal. It should be noted that the detection switch 20 can stop outputting the low-liquidity signal after the float 30 leaves the detection area, or it can stop outputting the low-liquidity signal after a delay after the float 30 leaves the detection area.

[0038] The liquid level detection device for viscous liquid provided in this application includes a liquid storage container 10, a float 30, and a detection switch 20. The liquid storage container 10 has a storage chamber 101, a detection chamber 102 communicating with the storage chamber 101, a filling port 103, and a discharging port 104. The user can add viscous liquid into the storage chamber 101 through the filling port 103, and the liquid storage container 10 can discharge the liquid to the target position through the discharging port 104. The float 30 is installed in the detection chamber 102 and can rise or fall with the liquid level of the viscous liquid in the detection chamber 102. A detection switch 20 is located at a height near the bottom of the detection chamber 102. When the remaining viscous liquid in the storage chamber 101 is insufficient, the float 30 falls into the detection area of ​​the detection switch 20. At this time, the detection switch 20 outputs a low liquid signal to drive a relevant liquid replenishment device to replenish the liquid or trigger a prompt signal to inform the user to replenish the liquid in time. This application, by setting the float 30 to a hollow structure and cooperating with the detection switch 20, can avoid the situation where the float 30 is completely immersed in the liquid due to the high viscosity and poor fluidity of the liquid, resulting in a slow action response of the float 30. This can lead to situations where the liquid is full but the prompt still appears that liquid needs to be added or the prompt disappears after a delay, and the liquid addition status cannot be reflected in a timely manner.

[0039] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the detection switch 20 includes a signal transmitting unit 21 and a signal receiving unit 22, the signal transmitting unit 21 and the signal receiving unit 22 are externally placed in the detection cavity 102 and horizontally distributed at opposite ends of the bottom of the detection cavity 102, the signal transmitting unit 21 is configured to emit a light beam, and the signal receiving unit 22 is configured to receive a light beam. When the float 30 falls to the bottom of the detection cavity 102, the float 30 blocks the light beam emitted by the signal transmitting unit 21 from being transmitted to the signal receiving unit 22.

[0040] The liquid level detection device for viscous liquid in the above embodiment further defines the detection switch 20 to detect whether the float 30 has descended to the bottom of the detection chamber 102 by emitting a light beam and receiving the blocked light signal, thereby determining the amount of viscous liquid remaining in the storage chamber 101. Through the cooperation between the signal transmitting unit 21, the signal receiving unit 22 and the float 30, the detection device of this application has a simple structure and is sensitive and reliable in operation.

[0041] The signal transmitting unit 21 can be used to emit light. For example, the signal transmitting unit 21 can emit near-infrared or infrared light. The signal receiving unit 22 can be used to receive the light emitted by the signal transmitting unit 21. Specifically, when the signal receiving unit 22 receives the light beam emitted by the signal transmitting unit 21, it proves that the float 30 has not fallen into the detection area of ​​the detection switch 20, indicating that the viscous liquid in the storage chamber 101 is sufficient and no replenishment is needed; when the signal receiving unit 22 does not receive the light beam emitted by the signal transmitting unit 21, it indicates that the light transmission path between the two is blocked by the float 30, and at this time the remaining viscous liquid in the storage chamber 101 is insufficient and replenishment is needed.

[0042] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further defines that when the bottom of the float 30 abuts against the bottom of the detection cavity 102, the float 30 at least partially falls into the detection area of ​​the detection switch 20.

[0043] The liquid level detection device for viscous liquid in the above embodiment further specifies that when the bottom of the float 30 abuts against the bottom of the liquid storage chamber 101, it indicates that the viscous liquid stored in the liquid storage chamber 101 is almost consumed. When the bottom of the float 30 abuts against the bottom of the liquid storage chamber 101, part of the float 30 falls into the detection area of ​​the detection switch 20, thereby triggering the detection switch 20 to output a liquid shortage signal. This avoids the detection switch 20 from being untriggered due to the small size of the float 30 sinking to the bottom of the detection chamber 102 and falling into the gap between the bottom of the detection chamber 102 and the detection area.

[0044] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the detection chamber 102 is distributed along the height direction of the liquid storage container 10, and the two ends of the detection chamber 102 from bottom to top are respectively provided with a cavity connection port 107 and a vent port 105. The detection chamber 102 can be connected to the liquid storage chamber 101 through the cavity connection port 107 or the vent port 105. The horizontal height of the vent port 105 on the liquid storage chamber 101 is greater than the horizontal height of the liquid filling port 103 on the liquid storage chamber 101.

[0045] The liquid level detection device for viscous liquid in the above embodiment further defines that the detection chamber 102 is provided with a vent 105, and the horizontal height of the vent 105 in the liquid storage chamber 101 is greater than the horizontal height of the liquid inlet 103 in the liquid storage chamber 101. Even if the viscous liquid added into the liquid storage chamber 101 is momentarily higher than the height of the liquid inlet 103, it will not obstruct the communication between the vent 105 and the external atmosphere, ensuring that the liquid level in the detection chamber 102 changes with the liquid level change of the liquid storage chamber 101 after the liquid level in the liquid storage chamber 101 exceeds the cavity connection port 107.

[0046] The cavity connection port 107 can be used to introduce viscous liquid from the storage cavity 101 into the detection cavity 102; the vent port 105 can be used to connect the detection cavity 102 with the external atmosphere, thereby balancing the air pressure and ensuring that the liquid level in the detection cavity 102 changes with the liquid level in the storage cavity 101 after the liquid level in the storage cavity 101 exceeds the cavity connection port 107.

[0047] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the detection cavity 102 can be divided into an interconnected movable channel 108 and a venting channel 106 from bottom to top. The diameter of the movable channel 108 is larger than the diameter of the float 30, and the diameter of the float 30 is larger than the diameter of the venting channel 106. A vent 105 is provided at one end of the venting channel 106 away from the movable channel 108, and the horizontal height of the movable channel 108 on the liquid storage cavity 101 is lower than the horizontal height of the liquid filling port 103 on the liquid storage cavity 101.

[0048] The liquid level detection device for viscous liquid in the above embodiment further defines the dimensional relationship between the diameter of the float 30, the diameter of the venting channel 106, and the diameter of the moving channel 108. This limits the range of motion of the float 30 within the detection chamber 102, preventing the float 30 from rising too high and requiring a longer time to descend, which could lead to insufficient liquid level and prevent the detection switch 20 from outputting a low-liquid signal in time. Furthermore, by making the diameter of the float 30 smaller than the diameter of the venting channel 106, the float 30 is prevented from crossing the venting channel 106 and entering the storage chamber 101, thus preventing detection failure.

[0049] The diameter of the float 30 is larger than the diameter of the venting channel 106 but smaller than the diameter of the moving channel 108. Therefore, the float 30 can float up and down within the moving channel 108, but the float 30 cannot cross the moving channel 108 to enter the venting channel 106, thus limiting the range of motion of the float 30.

[0050] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the liquid storage container 10 includes a container body 11 and a partition 12, the partition 12 is installed inside the container body 11, and the partition 12 divides the space inside the container body 11 into a liquid storage chamber 101 and a detection chamber 102; the upper end of the partition 12 forms a ventilating channel 106 with the container body 11, and the lower end of the partition 12 forms an active channel 108 with the container body 11.

[0051] The partition 12 may include a first connecting plate 121, a second connecting plate 122, and a third connecting plate 123 connected in sequence. The first connecting plate 121 is located at the lower end of the liquid storage chamber 101, and the third connecting plate 123 is located at the upper end of the liquid storage chamber 101. The distance between the first connecting plate 121 and the container body 11 is relatively large, resulting in a larger diameter of the movable channel 108 formed between the first connecting plate 121 and the container body 11. The distance between the third connecting plate 123 and the container body 11 is relatively small, resulting in a smaller diameter of the ventilated channel 106 formed between the third connecting plate 123 and the container body 11.

[0052] It should be noted that a sealed mounting cavity is provided on the first connecting plate 121, and one of the signal transmitting unit 21 or the signal receiving unit 22 can be installed in the mounting cavity.

[0053] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the cavity wall of the active channel 108 is provided with a plurality of protruding and spaced anti-sticking ribs 110.

[0054] The liquid level detection device for viscous liquid in the above embodiment further defines that the movable channel 108 is provided with a plurality of anti-sticking ribs 110. The plurality of anti-sticking ribs 110 protrude from the cavity wall and are spaced apart. Based on the above design, the contact area between the float 30 and the cavity wall of the movable channel 108 is reduced, so as to avoid the viscous liquid remaining on the cavity wall sticking to the float 30 and preventing it from moving due to the excessive contact area between the float 30 and the cavity wall of the movable channel 108, thus causing the liquid level detection function to fail.

[0055] The anti-sticking rib 110 can be a protruding structure extending from the cavity wall of the movable channel 108. The protruding structure can be distributed at the top, bottom and periphery of the movable channel 108. The protruding structure is small in size and can prevent the float 30 from directly contacting the cavity wall of the movable channel 108.

[0056] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the bottom of the liquid storage chamber 101 is inclined upward in all directions around the liquid outlet 104, and the detection chamber 102 is set away from the liquid outlet 104.

[0057] The liquid level detection device for viscous liquid in the above embodiment further defines the bottom of the liquid storage chamber 101 as inclined upwards from the liquid outlet 104 as the center, so that when the remaining amount of viscous liquid in the liquid storage chamber 101 is low, it can still slide down to the liquid outlet 104 by its own weight along the inclined direction.

[0058] In addition to the features of the above embodiments, this embodiment further specifies that: the detection device also includes a prompting device, which is electrically connected to the detection switch 20. The prompting device is used to receive a low liquid signal and issue a prompting signal, which includes one or a combination of sound, light, or information push.

[0059] The liquid level detection device for viscous liquid in the above embodiment is further defined by having a prompting device on the detection device. When the detection switch 20 triggers and outputs a low liquid signal, the prompting device can issue one or a combination of prompting signals such as sound, light or information push according to the low liquid signal to remind the user to replenish the liquid in time.

[0060] This embodiment provides a liquid level detection system for viscous liquids, including a controller and a liquid level detection device for viscous liquids as described above; the controller is electrically connected to the detection switch 20 and the prompting device respectively, and the controller is used to convert the received liquid shortage signal and output a control signal to the prompting device to control the prompting device to output a prompt signal.

[0061] The controller can connect to multiple external devices, such as display devices and liquid dispensing devices. For example, the controller is a microcontroller, electrically connected to the aforementioned viscous liquid level detection device, display device, and liquid dispensing device. When the detection device outputs a low-liquidity signal, the controller receives the signal and outputs control signals to control the display device, liquid dispensing device, and prompting device. Upon receiving the control signal, the display device shows that the storage chamber 101 is currently low on liquid. Upon receiving the control signal, the prompting device outputs one or a combination of prompt signals, such as sound, light, or information push notifications. Upon receiving the control signal, the liquid dispensing device can automatically replenish the storage chamber 101. It should be noted that the liquid dispensing device is electrically driven, requiring no manual intervention, thus improving the system's intelligence.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A liquid level detection device for a viscous liquid, characterized in that, include: A liquid storage container (10) is provided with a liquid storage chamber (101), and a detection chamber (102), a liquid inlet (103) and a liquid outlet (104) communicating with the liquid storage chamber (101). The liquid outlet (104) is distributed at the bottom of the liquid storage chamber (101). The liquid storage chamber (101) is used to store viscous liquid. A float (30) is a hollow structure and is movably disposed within the detection cavity (102); A detection switch (20) is set at a height close to the bottom of the detection chamber (102). The detection switch (20) is used to check whether the float (30) falls to the bottom of the detection chamber (102). When the float (30) falls to the bottom of the detection chamber (102) and is within the detection area of ​​the detection switch (20), the detection switch (20) sends a low liquid signal.

2. The liquid level detection device for viscous liquids according to claim 1, characterized in that, The detection switch (20) includes a signal transmitting unit (21) and a signal receiving unit (22). The signal transmitting unit (21) and the signal receiving unit (22) are externally placed in the detection cavity (102) and horizontally distributed at opposite ends of the bottom of the detection cavity (102). The signal transmitting unit (21) is configured to emit a light beam, and the signal receiving unit (22) is configured to receive a light beam. When the float (30) falls to the bottom of the detection cavity (102), the float (30) blocks the light beam emitted by the signal transmitting unit (21) from being transmitted to the signal receiving unit (22).

3. The liquid level detection device for viscous liquids according to claim 2, characterized in that, When the bottom of the float (30) comes into contact with the bottom of the detection cavity (102), the float (30) falls at least partially into the detection area of ​​the detection switch (20).

4. The liquid level detection device for viscous liquids according to claim 1, characterized in that, The detection chamber (102) is distributed along the height direction of the liquid storage container (10). The detection chamber (102) has a cavity connection port (107) and a vent (105) at its two ends from bottom to top. The detection chamber (102) can be connected to the liquid storage chamber (101) through the cavity connection port (107) or the vent (105). The horizontal height of the vent (105) on the liquid storage chamber (101) is greater than the horizontal height of the liquid filling port (103) on the liquid storage chamber (101).

5. The liquid level detection device for viscous liquids according to claim 4, characterized in that, The detection chamber (102) can be divided into an interconnected movable channel (108) and a venting channel (106) from bottom to top. The diameter of the movable channel (108) is larger than the diameter of the float (30), and the diameter of the float (30) is larger than the diameter of the venting channel (106). The venting port (105) is provided at one end of the venting channel (106) away from the movable channel (108), and the horizontal height of the movable channel (108) on the liquid storage chamber (101) is lower than the horizontal height of the liquid filling port (103) on the liquid storage chamber (101).

6. The liquid level detection device for viscous liquids according to claim 5, characterized in that, The liquid storage container (10) includes a container body (11) and a partition (12). The partition (12) is installed inside the container body (11) and divides the space inside the container body (11) into a liquid storage chamber (101) and a detection chamber (102). The upper end of the partition (12) forms the ventilation channel (106) with the container body (11), and the lower end of the partition (12) forms the movement channel (108) with the container body (11).

7. The liquid level detection device for viscous liquids according to claim 5, characterized in that, The cavity wall of the active channel (108) is provided with a plurality of protruding and spaced anti-sticking ribs (110).

8. The liquid level detection device for viscous liquids according to claim 1, characterized in that, The bottom of the liquid storage chamber (101) is inclined upwards in all directions around the liquid outlet (104), and the detection chamber (102) is located away from the liquid outlet (104).

9. The liquid level detection device for viscous liquids according to any one of claims 1-8, characterized in that, It also includes a prompting device, which is electrically connected to the detection switch (20). The prompting device is used to receive the low fluid signal and issue a prompting signal, which includes one or a combination of sound, light or information push.

10. A liquid level detection system for a viscous liquid, characterized in that, The device includes a controller and a liquid level detection device for viscous liquid as described in claim 9 above; the controller is electrically connected to the detection switch (20) and the prompting device respectively, and the controller is used to convert the received low liquid signal and output a control signal to the prompting device to control the prompting device to output a prompt signal.

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