CN218916475U

CN218916475U - Water tank water level detection device, system and steaming and baking box

Info

Publication number: CN218916475U
Application number: CN202223193809.XU
Authority: CN
Inventors: 胡国根; 洪坤; 方献良
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-25
Anticipated expiration: 2032-11-30

Abstract

The utility model provides a water tank water level detection device, a system and a steaming oven, wherein a water tank is provided with a transparent water tank wall, the outer side of the transparent water tank wall is provided with a folding hole, and the detection device comprises: a luminous tube for emitting incident light to the wall of the transparent water tank; the receiving tube is arranged in pairs with the luminous tubes and is used for receiving light emitted by the luminous tubes and reflected by the wall of the transparent water tank; the photoelectric converter is electrically connected with the receiving tube and is used for converting the optical signals received by the receiving tube into electric signals; and the processor is electrically connected with the photoelectric converter and used for acquiring the electric signals transmitted from the photoelectric converter and outputting the water level height. The utility model does not destroy the original structure of the water tank, relies on an external device to detect the water level of the water tank, has low cost and can detect the height of a plurality of sections of water levels.

Description

Water tank water level detection device, system and steaming and baking box

Technical Field

The utility model relates to the field of water level detection, in particular to a water level detection device and system for a water tank and an oven.

Background

The existing photoelectric sensors are used for water level detection, and are generally made into a component by means of structures with special optical designs, such as a cone shape, a strip shape and the like, and are installed on a water tank and contacted with water.

Disclosure of Invention

The utility model aims to overcome the defect that a sensor is needed to be arranged in a water tank to detect the water level of the water tank in the prior art, and provides a water tank water level detection device, a water tank water level detection system and a steaming and baking box.

The utility model solves the technical problems by the following technical scheme:

in a first aspect, there is provided a detection apparatus for a water level of a water tank having a transparent water tank wall, an outside of the transparent water tank wall being provided with a folding hole, the detection apparatus comprising:

the luminous tube is used for emitting incident light to the wall of the transparent water tank;

the receiving pipes are arranged in pairs with the luminous tubes and are used for receiving light emitted by the luminous tubes and reflected by the transparent water tank wall;

a photoelectric converter electrically connected to the receiving tube for converting an optical signal received by the receiving tube into an electrical signal;

and the processor is electrically connected with the photoelectric converter and is used for acquiring the electric signals transmitted from the photoelectric converter and outputting the water level height.

Optionally, the luminous tube and the receiving tube are arranged in a plurality of pairs at different height positions.

Optionally, the detection device further comprises a controller, wherein the controller is electrically connected with the luminous tube and is used for sending a PWM modulation signal to the luminous tube so as to control the luminous tube to send PWM modulated incident light.

Optionally, the light emitted by the luminous tube is infrared light.

Optionally, the detection device further comprises a display, and the display is electrically connected with the processor and used for displaying the water level height in the water tank.

Optionally, a light blocking member is disposed between the light emitting tube and the receiving tube.

In a second aspect, a water tank water level detection system is provided, including the water tank, a water tank seat, and the water tank water level detection device in the first aspect, where the water tank is embedded in the water tank seat.

Optionally, the tank wall of the tank includes an outer tank wall and an inner tank wall.

Optionally, the luminous tube and the receiving tube are arranged on the same side surface of the water tank seat.

In a third aspect, there is provided a steaming oven comprising the water level detection system of the water tank of the second aspect.

The utility model has the positive progress effects that: the original structure of the water tank is not damaged, the water level of the water tank is detected by an external device, the cost is low, and the height of a plurality of sections of water levels can be detected.

Drawings

Fig. 1 is a schematic structural diagram of a water level detection device for a water tank according to an exemplary embodiment of the present utility model;

fig. 2 is a view illustrating an incident light path when water is present in a water tank water level detection apparatus according to an exemplary embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a water tank water level detection system according to an exemplary embodiment of the present utility model;

FIG. 4 is a graph of the path of incident light on the tank wall when there is no water in the tank provided by an exemplary embodiment of the present utility model;

fig. 5 is a graph showing the path of incident light on the wall of a water tank when water is present in the water tank according to an exemplary embodiment of the present utility model.

Detailed Description

The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.

Fig. 1 is a schematic structural diagram of a device for detecting water level in a water tank, the water tank 17 has a transparent water tank wall 16, a folding hole is provided on the outer side of the transparent water tank wall 16, the device comprises: a luminous tube 14, a receiving tube 15, a photoelectric converter and a processor; the luminous tube 14 and the receiving tube 15 are arranged in pairs, the luminous tube 14 emits incident light to the transparent water tank wall 16, the receiving tube 15 receives the light emitted by the luminous tube 14 and reflected by the transparent water tank wall 16, the photoelectric converter is electrically connected with the receiving tube 15, the light signal received by the receiving tube 15 is converted into an electric signal, and the processor is electrically connected with the photoelectric converter, acquires the electric signal transmitted from the photoelectric converter and outputs the water level height.

In one embodiment, the tank 17 has at least one transparent tank wall 16 to ensure that incident light can enter the transparent tank wall 16.

When the water tank is free of water, as shown in fig. 1, incident light emitted by the light emitting tube 14 is totally reflected to the receiving tube 15 through the inner wall 13 of the water tank;

when water exists in the water tank, as shown in fig. 2, a part of incident light emitted by the luminous tube 14 is totally reflected to the receiving tube 15 through the inner wall 13 of the water tank, and the other part of the incident light is refracted into the water in the water tank 17, and the light received by the receiving tube 15 is less than the light received by the receiving tube 15 when the corresponding height in the water tank is free of water;

in the specific implementation process, a light quantity threshold value and a corresponding voltage threshold value which can distinguish whether water exists at the same height can be determined according to a pre-experiment;

the photoelectric converter converts the optical signal received by the receiving tube 15 into an electric signal, and the processor compares the received electric signal with a preset voltage threshold value to determine whether water exists in the water tank 17;

when the light quantity received by the receiving tube 15 is smaller than the light quantity threshold value (the voltage value of the corresponding electric signal is smaller than the voltage threshold value), judging that the corresponding height in the water tank 17 is water, and when the light quantity received by the receiving tube 15 is larger than the light quantity threshold value (the voltage value of the corresponding electric signal is larger than the voltage threshold value), judging that the corresponding height in the water tank 17 is water-free;

wherein the light quantity threshold value is determined according to the actual situation.

In one embodiment, the luminous tube 14 and the receiving tube 15 are arranged in a plurality of pairs at different height positions, so that the height of the multi-section water level can be detected, and the practicability of the detection device is improved;

wherein, the emission angle of the luminous tube 14 is 60 degrees or 120 degrees, which is set by oneself according to practical conditions.

In one embodiment, the detecting device further includes a controller electrically connected to the light emitting tube 14, and configured to send a PWM modulation signal to the light emitting tube 14, so as to control the light emitting tube 14 to emit PWM modulated incident light, eliminate interference of ambient light on the incident light, make the detecting device not need to control a dark condition, and also can be used in sunlight, so that universality and practicability of the detecting device are improved.

In one embodiment, the light emitted by the light emitting tube 14 is infrared light, which has low power consumption and prolongs the service life of the light emitting tube.

In one embodiment, the detection device further comprises a display electrically connected to the processor for displaying the level of water in the water tank, and visualizing the level of water.

In one embodiment, a light blocking member is provided between the light emitting tube 14 and the receiving tube 15 to prevent incident light from directly entering the receiving tube 15.

The embodiment of the utility model also provides a water tank water level detection system, which comprises a water tank 17, a water tank seat 31 and the water tank water level detection device provided by any embodiment; the water tank 17 is embedded in the water tank seat 31, and can be seen in fig. 3.

When the folding holes are not formed in the outer wall 12 of the water tank, all incident light is refracted out of the inner wall 13 of the water tank, and a part of light is not totally reflected, but the water tank wall 16 of the water tank 17 in the water tank water level detection system provided by the embodiment of the utility model comprises the outer wall 12 of the water tank and the inner wall 13 of the water tank, the folding holes are formed in the outer wall 12 of the water tank, so that the incident light emitted by the luminous tube 14 is refracted along different angles, and therefore, a part of light can be totally reflected, and the receiving tube 15 can receive the totally reflected light;

wherein, the folding holes on the outer wall 12 of the water tank can be frosted or dense small concave holes are arranged.

The principle of operation of the refractive holes in the outer wall of the tank is further described below with reference to fig. 4 and 5:

when the water in the water tank is not contained, as shown in fig. 4, the light-emitting tube 14 emits incident light to the water tank outer wall 12, the incident light enters the water tank outer wall 12 to be refracted, light with a small refraction angle enters the water tank inner wall 13 and then enters the water tank 17, the light with a large refraction angle is totally reflected by the water tank inner wall 13 due to the incident angle alpha > beta, and cannot pass through the water tank inner wall 13, and the light passes through the refraction Kong Sheshe of the water tank outer wall 12 to be provided to the receiving tube 15, wherein the incident angle is A, the refraction angle is B, and the incident angle A > refraction angle B;

when water exists in the water tank, as shown in fig. 5, the light emitting tube 14 emits incident light to the water tank outer wall 12, the incident light enters the water tank outer wall 12 to be refracted, light with a small refraction angle enters the water tank inner wall 13 and then enters the water tank 17, only a small amount of light is totally reflected due to the fact that the water is close to the water tank refractive index of the plastic material, and the rest of light enters the water in the water tank 17, wherein C is the refraction angle at which the incident light enters the water tank inner wall 13 to be refracted, and the light received by the receiving tube 15 is smaller than the light received by the receiving tube 15 when water exists in the water tank.

In one embodiment, light emitting tube 14 and receiving tube 15 are disposed on the same side of water tank mount 31, so that receiving tube 15 receives incident light emitted by light emitting tube 14.

The embodiment of the utility model also provides a steaming and baking box, which comprises the water level detection system of the water tank provided by any embodiment.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims

1. A detection device for water level of a water tank, characterized in that the water tank is provided with a transparent water tank wall, and a folding hole is arranged on the outer side of the transparent water tank wall, and the detection device comprises:

2. The apparatus for detecting a water level of a water tank as claimed in claim 1, wherein said luminous tube and said receiving tube are provided in a plurality of pairs at different height positions.

3. The apparatus for detecting a water level of a water tank as claimed in claim 1, wherein the apparatus further comprises a controller electrically connected to the light emitting tube for transmitting a PWM modulation signal to the light emitting tube to control the light emitting tube to emit the PWM-modulated incident light.

4. The apparatus for detecting a water level of a water tank as claimed in claim 1, wherein the light emitted from said luminous tube is infrared light.

5. The water tank level detection apparatus as recited in any one of claims 1 to 4, further comprising a display electrically connected to the processor for displaying the level of water in the water tank.

6. The water tank water level detecting device as claimed in any one of claims 1 to 4, wherein a light blocking member is provided between the light emitting tube and the receiving tube.

7. A water tank water level detection system comprising the water tank of claim 1, a water tank base, and the water tank water level detection device of any one of claims 1 to 6; wherein the water tank is embedded in the water tank seat.

8. The water tank level detection system as recited in claim 7, wherein the tank wall of the tank includes an outer tank wall and an inner tank wall.

9. The water level detection system of claim 7, wherein the light emitting tube and the receiving tube are disposed on a same side of the water tank base.

10. An oven comprising a system for detecting the water level of a tank as claimed in any one of claims 7 to 9.