CN219245785U

CN219245785U - Device for judging whether liquid exists in liquid inlet pipe of equipment

Info

Publication number: CN219245785U
Application number: CN202320317550.0U
Authority: CN
Inventors: 周松; 刘上海
Original assignee: Suzhou Eulogy Electrical Appliance Co ltd
Current assignee: Suzhou Eulogy Electrical Appliance Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-06-23
Anticipated expiration: 2033-02-27

Abstract

A device for judging whether liquid exists in a liquid inlet pipe of equipment comprises a light source and a photoresistor, wherein the light source and the photoresistor are arranged on the wall of a pipeline; the photoresistor is arranged close to the light source, and light refraction can induce the intensity of light rays of the pipeline in two states of liquid and non-liquid; the device also comprises a control module for collecting the resistance signal of the photoresistor and analyzing the resistance change, and the control module is electrically connected with the photoresistor. The refraction of light and the characteristics that the resistance of the photoresistor is related to the intensity of light are utilized, the structure is simple, the conception is ingenious, the size of each component is small, the installation is convenient, if the component is arranged on the inner wall of the pipe, the occupied space in the pipe is small, and the flow of liquid in the pipe cannot be influenced.

Description

Device for judging whether liquid exists in liquid inlet pipe of equipment

Technical Field

The utility model relates to the technical field of automation or intelligence, in particular to a device for judging whether liquid exists in a liquid inlet pipe of equipment, wherein the equipment is equipment in household appliances such as a cleaning dust collector, a milk warming device and the like.

Background

In order to prevent the heating device from dry burning, a detection device for detecting whether liquid exists in the pipe is usually installed in a liquid inlet pipeline communicated with the device in the prior art. The detection device comprises a detection device comprising a pressure sensor and a detection device comprising a capacitance resistor.

The pressure sensor has the advantages that the volume is large, the cost is high, the installation procedure is difficult for the pipe with smaller pipe diameter, the space in the pipe can be occupied, and the flow of water flow is influenced.

The detection device containing the capacitance and the resistance needs to be soaked in liquid all the time, the long-term soaking is easy to damage, the detection device needs to be replaced frequently, and the cost and the workload are increased.

Therefore, how to solve the above-mentioned drawbacks of the prior art is a subject to be studied and solved by the present utility model.

Disclosure of Invention

The utility model aims to provide a device for judging whether liquid exists in a liquid inlet pipe of equipment.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the device comprises a light source and a photoresistor, wherein the light source and the photoresistor are arranged on the wall of a pipeline, the light source irradiates towards the interior of the pipeline, and the photoresistor can sense the intensity of light rays in two states of liquid and non-liquid in the pipeline through the refraction of light; the device also comprises a control module for collecting resistance signals of the photoresistors and analyzing the resistance change of the photoresistors, and the control module is electrically connected with the photoresistors.

In the scheme, the photoresistor is a resistor which changes along with the intensity of incident light, the resistance value of the photoresistor is related to the intensity of light, the light intensity is increased, and the resistance is reduced; the light intensity decreases and the resistance increases. When the light irradiated by the light source is in the liquid in the pipeline, the light propagation path can be changed through the refraction of the liquid in the pipeline, the illumination intensity can be changed on the other hand, the light intensity change received in the process from no liquid in the pipeline to no liquid (or in the process from liquid to no liquid) is sensed by utilizing the characteristics of the photoresistor, the change of the photoresistor value is further displayed, and finally, whether the liquid exists in the pipeline is received and analyzed by the control module.

According to a further technical scheme, the pipeline is a light-transmitting pipeline, the light source and the photoresistor are arranged on the outer wall of the pipeline and are respectively positioned on two sides of the liquid level in the pipeline.

According to a further technical scheme, the pipeline is a light-blocking pipeline (a light-tight pipeline), the light source and the photoresistor are arranged on the inner wall of the pipeline and are respectively positioned on two sides of the liquid level in the pipeline, and a connecting line between the light source and the photoresistor cannot be perpendicular to the liquid level in the pipeline.

According to a further technical scheme, a plurality of light sources and photoresistors are arranged, the light sources and the photoresistors are arranged correspondingly, the corresponding arrangement of the light sources and the photoresistors can be that one light source corresponds to one photoresistor, and a plurality of groups are arranged, so that the influence of damage of the light sources or the photoresistors in a certain group on a judging result is avoided; or a plurality of light sources are arranged corresponding to one photoresistor, so that a plurality of groups can be arranged, and the influence of damage of a certain light source on a judging result is avoided; the light source (or a plurality of light sources) can be arranged corresponding to a plurality of photoresistors, and the arrangement can be used in the situation that when liquid exists, in order to ensure that the light source is refracted, the photoresistors are positioned in a refracted light path, and the liquid level influences the angle of refraction and influences the light path, so that the photoresistors can be arranged to capture the light path.

According to a further technical scheme, the control module comprises a signal receiving device electrically connected with the photoresistor and a signal transmitting device electrically connected with the equipment, and the signal receiving device is electrically connected with the signal transmitting device, so that when the signal receiving device judges that no liquid exists in the pipeline, signals can be timely transmitted to the signal transmitting device, the signal transmitting device transmits the signals to the equipment, and the equipment stops heating in time after receiving the signals, so that equipment damage is avoided.

According to a further technical scheme, the device further comprises an alarm, the alarm is electrically connected with the signal transmitting device of the control module, and therefore when no liquid exists in the pipeline, the signal transmitting device transmits a signal to the alarm, and the alarm gives an alarm.

The utility model has the following advantages:

the light source and the photoresistor are arranged on the wall of the pipeline by utilizing the refraction principle of light, and the light of the light source forms a light path by taking air as a propagation medium when no liquid exists in the pipeline by utilizing the characteristics of the resistance value of the photoresistor and the intensity of the light; when liquid exists in the pipeline, the light of the light source takes the liquid and air as propagation media respectively, so that the light is refracted in the propagation process and deviates from the original light path; the device has the advantages that the device is simple in structure, ingenious in conception, small in size of each component and convenient to install, occupies small space in a pipe if the device is arranged on the inner wall of the pipe, and cannot influence the flow of liquid in the pipe.

Drawings

FIG. 1 is a schematic diagram of a pipeline according to an embodiment of the present utility model without liquid;

FIG. 2 is a schematic diagram of the structure of the pipeline according to the embodiment of the utility model when liquid is present in the pipeline.

In the above figures: 1. a pipe; 2. a light source; 3. a photoresistor; 4. a control module; 5. a signal receiving device; 6. an apparatus; 7. a signal transmitting device; 8. an alarm; A. an optical path; B. a liquid surface.

Description of the embodiments

The utility model is further described below with reference to the accompanying drawings and examples:

examples: the present utility model will be described in detail with reference to the drawings, wherein modifications and variations are possible in light of the teachings of the present utility model, without departing from the spirit and scope of the present utility model, as will be apparent to those of skill in the art upon understanding the embodiments of the present utility model.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Singular forms such as "a," "an," "the," and "the" are intended to include the plural forms as well, as used herein.

As used herein, the term "comprising" is intended to be inclusive and not limited to.

The term (terms) as used herein generally has the ordinary meaning of each term as used in this field, in this disclosure, and in the special context, unless otherwise noted. Certain terms used to describe the present disclosure are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in connection with the description herein.

Referring to fig. 1-2, a device for judging whether liquid exists in a liquid inlet pipe of equipment comprises a light source 2 and a photoresistor 3 which are arranged on the wall of a pipeline 1, wherein the pipeline 1 is a pipeline 1 for conveying liquid to equipment 6, and as long as the liquid exists in the pipeline 1, the liquid flows into the equipment 6, so that the equipment 6 is prevented from continuously working under the condition of water shortage; the light source 2 irradiates towards the inside of the pipeline 1, and the photoresistor 3 can sense the intensity of light rays in the pipeline 1 in two states of liquid and no liquid through the refraction of light; this includes two cases, case one (not shown in this case diagram): when the pipeline 1 is free of liquid, the photoresistor 3 is not positioned on the light path A of the light source 2, at the moment, the light received by the photoresistor 3 is weaker, and the resistance value of the photoresistor 3 is larger; when the pipeline 1 is provided with liquid, the light path A of the light source 2 is deflected by light refraction, the photoresistor 3 is just positioned on the deflected light path A, the illumination intensity received by the photoresistor 3 is enhanced, the resistance value of the photoresistor 3 is reduced, and the control module 4 can judge whether the liquid exists in the pipe through the change of the resistance value of the photoresistor 3.

And a second case: when the pipeline 1 is free of liquid, the photoresistor 3 is positioned on the light path A of the light source 2, at the moment, the light received by the photoresistor 3 is stronger, and the resistance value of the photoresistor 3 is smaller; when the pipeline 1 is provided with liquid, a propagation medium of the liquid is more between the light source 2 and the photoresistor 3, so that the light source 2 refracts in the propagation process, the light path A of the light source 2 deflects through the refraction of light and deviates from the photoresistor 3, the illumination intensity received by the photoresistor 3 is weakened at the moment, the resistance value of the photoresistor 3 is increased, and the control module 4 can judge whether the liquid exists in the pipe through the change of the resistance value. The structural design in the second case is simpler, so that the second case is preferable in the design, in this case, if the pipe 1 is a light-transmitting pipe 1, the light source 2 and the photoresistor 3 may be disposed on the outer wall or the inner wall of the pipe 1, and the light source and the photoresistor are respectively disposed on two sides of the liquid level B in the pipe. If the pipeline 1 is a light-blocking pipeline 1 (namely a light-proof pipeline), the light source 2 and the photoresistor 3 are arranged on the inner wall of the pipeline 1 and are respectively positioned on two sides of the liquid level B in the pipeline; the connection line between the light source 2 and the photoresistor 3 in the two cases cannot be perpendicular to the liquid level B in the pipe, if the liquid level B in the pipe is perpendicular, the refraction phenomenon cannot occur, so that the illumination intensity received by the photoresistor 3 has no obvious change when the liquid exists, and whether the liquid exists in the pipe cannot be judged. The light source 2 and the photoresistor 3 may be provided in plurality, and each light source 2 and each photoresistor 3 are correspondingly arranged, where the corresponding arrangement may be that one light source 2 is arranged corresponding to one photoresistor 3, and the arrangement may be that the photoresistors 3 are located in the light path a when no liquid exists, so that a plurality of groups are arranged, and thus, the damage of the light source 2 or the photoresistor 3 in a certain group is avoided to influence the judging result; or a plurality of light sources 2 are arranged corresponding to one photoresistor 3, and the arrangement can be used for arranging the photoresistors 3 in the light path A when no liquid exists, so that a plurality of groups can be arranged, and the influence of damage of a certain light source 2 on a judging result is avoided; it is also possible that one light source 2 (or a plurality of light sources 2) is arranged corresponding to a plurality of photoresistors 3, and this arrangement can be used in the case that when there is liquid, in order to ensure that the light source 2 is refracted, the photoresistors 3 are located in the refracted light path a, and because the liquid level affects the angle of refraction and affects the light path, a plurality of photoresistors 3 can be arranged to capture the light path a.

The device also comprises a control module 4 for collecting the resistance signal of the photoresistor 3 and analyzing the resistance change, wherein the control module 4 comprises a signal receiving device 5 electrically connected with the photoresistor 3 and a signal transmitting device 7 electrically connected with the equipment 6, and the signal receiving device 5 is electrically connected with the signal transmitting device 7. The device further comprises an alarm 8, which alarm 8 is electrically connected to the signal emitting means 7 of the control module 4. Therefore, when the signal receiving device 5 determines that no liquid exists in the pipeline 1, the signal can be timely transmitted to the signal transmitting device 7, the signal transmitting device 7 transmits the signal to the equipment 6 and the alarm 8, the equipment 6 stops working timely after receiving the signal, and the alarm 8 gives out an alarm to prompt staff, so that the equipment 6 is finally prevented from being damaged.

According to the above structure composition, the working principle of the utility model is now as follows:

when the light resistor 3 and the light source 2 are arranged on the inner wall of the tube, and when no liquid exists in the tube, light of the light source 2 is transmitted along a straight line by taking air as a medium, at the moment, the light resistor 3 is positioned in a light path A of the light source 2, the light received by the light resistor 3 is strong, and the resistance value of the light resistor 3 is small; when liquid exists in the pipe, the light of the light source 2 takes the liquid and air as propagation mediums respectively, refraction is carried out, the original propagation path is changed, namely, the light path A is shifted, the photoresistor 3 is not positioned in the shifted light path A any more, the illumination received by the photoresistor 3 is weaker, the resistance value of the photoresistor 3 is larger, and thus, when the pipeline 1 is changed from no liquid to liquid, the resistance value of the photoresistor 3 is changed from small to large; similarly, when the pipeline 1 is changed from liquid to non-liquid, the resistance of the photoresistor 3 is changed from large to small, the control module 4 can judge whether liquid exists or not through the change of the resistance, when the signal receiving device 5 judges that no liquid exists in the pipeline 1, the signal can be timely transmitted to the signal transmitting device 7, the signal transmitting device 7 transmits the signal to the equipment 6 and the alarm 8, the equipment 6 stops heating in time after receiving the signal, the alarm 8 gives an alarm to prompt staff, and finally the equipment 6 is prevented from being damaged.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims

1. A device for judging whether equipment feed liquor pipe is interior to have liquid, its characterized in that: the device comprises a light source (2) and a photoresistor (3) which are arranged on the wall of the pipeline (1), wherein the light source (2) irradiates towards the interior of the pipeline (1), and the photoresistor (3) can sense the intensity of light in the pipeline (1) in two states of liquid and non-liquid through the refraction of light;

the device also comprises a control module (4) for collecting resistance signals of the photoresistor (3) and analyzing the resistance change, and the control module (4) is electrically connected with the photoresistor (3).

2. The device for determining the presence of a liquid in a liquid inlet pipe of an apparatus according to claim 1, wherein: the pipeline (1) is a light-transmitting pipeline (1), the light source (2) and the photoresistor (3) are arranged on the outer wall of the pipeline (1), and the light source and the photoresistor are respectively positioned on two sides of the liquid level (B) in the pipeline.

3. The device for determining the presence of a liquid in a liquid inlet pipe of an apparatus according to claim 1, wherein: the pipeline (1) is a light-blocking pipeline (1), the light source (2) and the photoresistor (3) are arranged on the inner wall of the pipeline (1), and the light source and the photoresistor are respectively positioned on two sides of the liquid level (B) in the pipeline.

4. The device for determining the presence of a liquid in a liquid inlet pipe of an apparatus according to claim 1, wherein: the light sources (2) and the photoresistors (3) are all provided with a plurality of light sources, and the light sources (2) and the photoresistors (3) are correspondingly arranged.

5. The device for determining the presence of a liquid in a liquid inlet pipe of an apparatus according to claim 1, wherein: the control module (4) comprises a signal receiving device (5) electrically connected with the photoresistor (3) and a signal transmitting device (7) electrically connected with the equipment (6), and the signal receiving device (5) is electrically connected with the signal transmitting device (7).

6. The device for determining the presence of a liquid in a liquid inlet tube of an apparatus according to claim 5, wherein: the device also comprises an alarm (8), and the alarm (8) is electrically connected with a signal transmitting device (7) of the control module (4).