CN203432646U

CN203432646U - Non-contact liquid level detector

Info

Publication number: CN203432646U
Application number: CN201320463442.0U
Authority: CN
Inventors: 马少军; 谢辉
Original assignee: Guangdong Tonze Electric Co Ltd
Current assignee: Guangdong Tonze Electric Co Ltd
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2014-02-12
Anticipated expiration: 2023-07-31

Abstract

The utility model relates to a non-contact liquid level detector, comprising a control module and a container for containing liquid; the container is made of a non-metal material; a liquid level detecting element is arranged at the outer side of the container; the control module comprises a charging and discharging unit and a timing unit for recording charging and discharging time; the charging and discharging unit is connected with the liquid level detecting unit. The non-contact liquid level detector realizes the detection on existence of liquid in the container under the non-contact condition, and a utensil adopting the detector has the advantages of simple structure, low cost and easiness in cleaning.

Description

A kind of contactless liquid level detector

Technical field

The utility model relates to the induction type field of detecting of liquid container, more specifically, relates to a kind of contactless liquid level detector.

Background technology

In household utensils, such as there being the container of a carrying liquid in soy bean milk making machine, coffee machine, beer brewing machine, air evolution device with humidification function, as water tank or beer can.In prior art, these equipment mostly add by water-level probe, float are set the mode detecting water level height that tongue tube or float add microswitch, and then subcontrol tool or prompting user.

Above-mentioned water-level probe generally all adopts Metallic rod to make, and Metallic rod one end is stretched in liquid reservoir, and one end is connected to control circuit board, but which need to bore a hole on container chamber wall, and carries out effective sealing, and utensil one-piece construction is comparatively complicated; And in water tank, arrange in the mode of float, magnet is set conventionally in float, in water tank outside and top, tongue tube or microswitch are set, when liquid level changes, control circuit board, by the break-make of tongue tube or microswitch, judges whether liquid arrives peak level, but the utensil structure of this mode is also more complicated, as can be seen here, prior art integral body all exists cost higher to the detection of liquid level, not the shortcoming of easy cleaning.

Utility model content

The purpose of this utility model, overcomes the deficiencies in the prior art exactly, and a kind of contactless liquid level detector is provided.Utilize this device can be in noncontact situation to have no liquid to survey in to container, simple in structure, and be easy to clean.

In order to reach the purpose of this utility model, adopt following technical scheme:

A kind of contactless liquid level detector, comprise control module and for the container of carrying liquid, described container is non-metallic material, described outside of containers is provided with level detection element, described control module comprises charge/discharge unit and for recording the timing unit of the time of discharging and recharging, described charge/discharge unit is connected with level detection element.

As a kind of specific embodiment, described level detection element is the spring that sheet metal, derby, tinsel or tinsel turn to.

As a kind of specific embodiment, described level detection element is graphite flake, graphite line.

As a kind of specific embodiment, the material of described container is pottery, plastics or glass.

As a kind of specific embodiment, described container comprises diapire and sidewall, and described level detection element is arranged at container side wall outside or vessel bottom wall outside.

As a kind of specific embodiment, described container comprises diapire and sidewall, and the quantity of described level detection element is more than two, is arranged at respectively container side wall outside and vessel bottom wall outside.

As a kind of specific embodiment, described container comprises diapire and sidewall, and the quantity of described level detection element is more than two, is arranged at respectively the differing heights position outside container side wall.

As a kind of specific embodiment, the minimum distance of described level detection element and container inside wall is between 1mm-50mm.

As a kind of specific embodiment, also comprise the shell for support vessels, described container is fixedly connected with shell.

As a kind of specific embodiment, also comprise the shell for support vessels, described container activities is positioned in shell, between described container outer wall and shell, is reserved with gap.

Compared with prior art, the beneficial effects of the utility model are:

Contactless liquid level detector described in the utility model discharges and recharges time by level detection element being set at chamber wall and monitoring it outward, in having realized in noncontact situation container, there is the detection of no liquid, adopt the utensil of this sniffer to have simple in structure, advantage with low cost, easy to clean.

Accompanying drawing explanation

Fig. 1 is the structural representation of contactless liquid level detector described in embodiment 1.

Fig. 2 is the theory diagram of in the utility model, liquid level in container being responded to.

Fig. 3 is the structural representation of contactless liquid level detector described in embodiment 2.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described further:

Embodiment 1

Referring to Fig. 1-Fig. 2, contactless liquid level detector described in the utility model, comprise control module 3 and for the container 1 of carrying liquid, described container 1 is non-metallic material, described container 1 arranged outside has level detection element 4, described control module 3 comprises charge/discharge unit 31 and for recording the timing unit 32 of the time of discharging and recharging, described timing unit 32 is connected with charge/discharge unit 31, and described charge/discharge unit 31 is connected with level detection element 4.

Above-mentioned level detection element 4 can be metal, is preferably the spring that sheet metal, derby, tinsel or tinsel turn in form, and the spring that wherein tinsel turns to can be placed between chamber wall and shell 51, so that spring pushes against container 1; Level detection element 4 can be also the good non-metal conductor of electric conductivity, and as graphite flake, graphite line, the material of said vesse 1 is pottery, plastics or glass, and the minimum distance of described level detection element 4 and container 1 madial wall is between 1mm-50mm.

Said vesse 1 comprises diapire and sidewall, as required, described level detection element 4 can be arranged at container 1 sidewall outside or container 1 bottom wall outer, as needs the different liquid levels in exploration vessel 1, a plurality of level detection elements 4 can be arranged to the differing heights position outside container 1 sidewall; As need the minimum liquid level in container 1, level detection element 4 can be arranged to container 1 bottom wall outer or sidewall outside near the position of diapire.Obviously, those skilled in the art also can carry out other possible permutation and combination to the quantity of liquid level sensor 4 and setting position.

In the present embodiment, the quantity of described level detection element 4 is three, wherein high-order detection metal 41 and low level are surveyed the differing heights position that metal 42 is positioned at container 1 sidewall outside, if at container 1 sidewall arranged outside multi-level detecting element more, just can to water level, carry out multistage control respectively, bottom surface is surveyed metal 43 and is positioned at container 1 diapire, for whether having liquid in the minimum liquid level of exploration vessel 1 or exploration vessel.

Based on said structure and setting, the contactless liquid level detector principle of work described in the present embodiment is as follows:

Referring to Fig. 2, level detection element 4 is equivalent to a pad, form an inductance capacitance with ground, in the situation that environment is constant around, capacitance is fixed as small value, there is the fixing time that discharges and recharges, and when add tap water 2(or other conducting liquids in container 1) after, be equivalent to have conductor close to level detection element 4, between tap water 2 and level detection element 4, can form distributed capacitance (coupling capacitance), now be equivalent in the detection port of control module 4 electric capacity in parallel, increased on the whole the electric capacity of level detection element 4, therefore time induction type detecting module 4 being discharged and recharged also can correspondingly increase.Whether control module 3 discharges and recharges the variation of time by detecting induction type detecting module 4, thereby in inspection instrument 1, have tap water 2 to exist, and according to this judged result controling appliance work or give user with prompting.

Choose that in container 1, to have or not the two states of tap water 2 be the detection process that example illustrates liquid level sensing device described in the utility model below.Referring to Fig. 1 and Fig. 2, after liquid level sensing device energising, metal 41 is surveyed to a high position in charge/discharge unit 31 periodicity or the aperiodicity ground of control module 3, low level surveys metal 42 or bottom surface detection metal 43 discharges and recharges operation, and 32 pairs of timing units discharge and recharge the time of operation continuously and transfer to control module 3 to compare, when adding tap water and arriving or surpass the position of level detection element 4 correspondences in container 1, the time that discharges and recharges to level detection element 4 will inevitably change, control module 3 detects the variation of this time, and judge that thus container 1 is inherent to the high-order metal 41 of surveying, the correspondence position that low level is surveyed metal 42 or bottom surface detection metal 43 has or not tap water 2 to exist.

Should be appreciated that, the contactless principle of contactless liquid level detector is also applicable to other embodiment of this instructions described in the present embodiment.

Embodiment 2

Referring to Fig. 3, the present embodiment is from the different of embodiment 1, and in embodiment 1, shell 51 is fixedly connected with container 1, particularly, container 1 by opening week along being connected as a single entity with shell 51 and being supported by shell 51.

In the present embodiment, the shell 52 of device forms one for holding the cavity volume of container 1, and described container 1 is positioned in shell 52 actively, between container 1 outer wall and shell 52 inwalls, form gap, based on this setup, container 1 dismounting easily, is convenient to clean and use.

Should be appreciated that, above specific embodiment is just explained in detail preferred implementation of the present utility model, but the utility model is not limited to above-mentioned embodiment.In a word, in the cognition that one skilled in the relevant art possesses, above-described embodiment can also be made various variations under the prerequisite that does not depart from the utility model aim, and these distortion are all in the scope of the utility model claim protection.

Claims

1. a contactless liquid level detector, comprise control module and for the container of carrying liquid, it is characterized in that, described container is non-metallic material, described outside of containers is provided with level detection element, described control module comprises charge/discharge unit and for recording the timing unit of the time of discharging and recharging, described charge/discharge unit is connected with level detection element.

2. contactless liquid level detector as claimed in claim 1, is characterized in that, described level detection element is the spring that sheet metal, derby, tinsel or tinsel turn to.

3. contactless liquid level detector as claimed in claim 1, is characterized in that, described level detection element is graphite flake, graphite line.

4. contactless liquid level detector as claimed in claim 1, is characterized in that, the material of described container is pottery, plastics or glass.

5. contactless liquid level detector as claimed in claim 1, is characterized in that, described container comprises diapire and sidewall, and described level detection element is arranged at container side wall outside or vessel bottom wall outside.

6. contactless liquid level detector as claimed in claim 1, is characterized in that, described container comprises diapire and sidewall, and the quantity of described level detection element is more than two, is arranged at respectively container side wall outside and vessel bottom wall outside.

7. contactless liquid level detector as claimed in claim 1, is characterized in that, described container comprises diapire and sidewall, and the quantity of described level detection element is more than two, is arranged at respectively the differing heights position outside container side wall.

8. contactless liquid level detector as claimed in claim 1, is characterized in that, the minimum distance of described level detection element and container inside wall is between 1mm-50mm.

9. contactless liquid level detector as claimed in claim 1, is characterized in that, also comprises the shell for support vessels, and described container is fixedly connected with shell.

10. contactless liquid level detector as claimed in claim 1, is characterized in that, also comprises the shell for support vessels, and described container activities is positioned in shell, between described container outer wall and shell, is reserved with gap.