CN210842926U - Overflow detection device and dish-washing machine - Google Patents

Abstract

The utility model discloses an overflow detection device, be used for detecting the float switch body and the float of overflow in the dish washer, the float switch body is installed on the positioning frame of dish washer, symmetrical connection has the pterygoid lamina on the wall of positioning frame both sides, and installs two first probes of the conductive type and the second probe that are used for detecting the overflow on the pterygoid lamina, MCU microcontroller series connection in first probe, second probe and the dish washer, MCU microcontroller electric connection alarm device, through the rising contact first probe and the second probe realization detection that rise on water. The dish washing machine comprises the overflow detection device, and the overflow detection device is the overflow detection device. The float microswitch is connected with the metal probes in parallel for use, whether overflow occurs or not is judged through detection logic, and when the float microswitch fails, the two metal probes can be connected with a conductive output signal in water to detect overflow, so that the detection reliability is improved compared with that of only using a float to detect.

Description

Overflow detection device and dish-washing machine

Technical Field

The utility model belongs to the technical field of domestic appliance, especially, relate to an overflow detection device and dish washer.

Background

The dish washer belongs to the wading electrical apparatus, has the problem that many different specification hoses connect in whole dish washer. Along with long-time use, some device interface hoses age along with, the life-span reaches the limit, have the risk of leaking, in order to discover when this hidden danger takes place the timing, avoid causing unnecessary economic loss to the user, general dish washer all can increase overflow detection mechanism at the base, this mechanism generally is float switch, the theory of operation, when water spills to the bottom, a certain amount of water gathers in bottom low-lying place, the buoyancy of water floats the foam float, float protruding department pushes up float top micro-gap switch, the switch action. After the whole machine is powered on, the MCU starts to receive feedback signals, when the floater bulge is jacked to the micro switch above the floater, the float switch feeds back the signals to the MCU, the MCU immediately sends out control instructions as long as receiving the feedback signals, the drainage pump control circuit works, the drainage pump is started to drain water in the dish washing machine, and more water is prevented from overflowing. Then, when the single floater detection fails, the overflow detection can not be carried out; further development and design of the device are needed for this purpose.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an overflow detection device and dish washer to solve background art's problem.

In order to achieve the above object, the utility model discloses an overflow detection device and dish washer's concrete technical scheme as follows:

an overflow water detection device comprises a floater switch body and a floater which are used for detecting overflow water in a dish washing machine, wherein the floater switch body is arranged on a positioning frame of the dish washing machine; the utility model discloses a dish washer, including positioning frame, MCU microcontroller, warning device, positioning frame, locating frame, MCU microcontroller electrical connection alarm device, water rises and contacts first probe and second probe simultaneously through water and makes its conduction current after, thereby triggers the drain pump start of MCU microcontroller electrical control dish washer water-logging, prevents that water from spilling over to the interior water evacuation in the dish washer, and install two first probes of conductive type and the second probe that are used for detecting the overflow on the pterygoid lamina, the MCU microcontroller establishes ties with the dish washer in first probe, second probe, MCU microcontroller electrical connection alarm device.

Furthermore, the first probe and the second probe can respectively and separably penetrate through the round hole in the floater, the first probe, the second probe and the round hole are not in contact, and the bottoms of the first probe and the second probe are on the same horizontal plane with the bottom surface of the floater.

Furthermore, two pterygoid laminas of positioning frame all pass through first probe of threaded connection detachable location, second probe, and first probe and second probe set up respectively on the pterygoid lamina of difference.

Furthermore, the first probe and the second probe are of conductive metal rod structures.

Furthermore, the first probe and the second probe are both of a telescopic conductive rod structure capable of being adjusted in a telescopic mode.

Furthermore, the conductive telescopic rod structure comprises a conductive metal sleeve which is in threaded connection with the wing plate, and a conductive metal rod which is suspended downwards in the conductive metal sleeve, wherein the conductive metal sleeve and the conductive metal rod are in mutual insertion type threaded connection to adjust the total length.

Further, the positioning frame is of an insulating plastic frame structure.

Furthermore, a scale groove for observing and adjusting the length is formed in the conductive metal rod.

A dish washing machine comprises an overflow detection device, wherein the overflow detection device is the overflow detection device.

Compared with the prior art, the utility model discloses following beneficial effect has:

the float microswitch is connected with the metal probes in parallel for use, whether overflow occurs or not is judged through detection logic, and when the float microswitch fails, the two metal probes can be connected with a conductive output signal in water to detect overflow, so that the detection reliability is improved compared with that of only using a float to detect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a block diagram of a system after attaching a first probe and a second probe to an existing dishwasher.

The reference numbers in the figures illustrate: float switch body 1, float 2, positioning frame 3, first probe 4, second probe 5.

Detailed Description

For a better understanding of the objects, structure and function of the invention, reference should be made to the drawings, FIGS. 1-2, which are included to illustrate the invention.

Anti-overflow water detection device touches float 2 after utilizing water to rise in current dish washer, drives float 2 come-up back contact float switch body 1 to switch on this float switch, trigger the MCU microcontroller in the dish washer built-in, recycle MCU microcontroller to drain pump control circuit work, the drain pump is opened, with dish washer water evacuation, prevents that more water from spilling over. The middle of the floater 2 comprises a convex structure, the floater 2 is arranged at the bottommost layer, the floater switch body 1 is fixed above the convex structure of the floater 2 through the positioning frame 3, a gap between the floater 2 and the floater switch body 1 is controlled, and certain buoyancy of water is ensured to enable the floater 2 to float to trigger the floater switch body 1 to act. However, when the float switch described above fails, it is impossible to detect water overflow.

The designed overflow water detection device has a double detection mechanism as shown in fig. 1, even if a float switch fails, detection can still be realized by two metal probes, the structure mainly comprises a float switch body 1 and a float 2 which are used for detecting overflow water in the dish washing machine in the prior art, the float switch body 1 is arranged on a positioning frame 3 of the dish washing machine, and the positioning frame 3 is an insulating plastic frame structure; the main innovation and improvement points of the design are as follows: the wing plates are symmetrically connected to two side walls of the positioning frame 3, two conductive first probes 4 and two conductive second probes 5 for detecting overflow are installed on the wing plates, the two probes are connected into an MCU (microprogrammed control unit) in the prior art, the MCU is electrically connected with a drain pump for controlling the water in the dish washing machine, and after current is conducted between the first probes 4 and the second probes 5, the drain pump is switched on to directly drain the water in the dish washing machine. Wherein, first probe 1, the separable circular hole in the round hole that passes on the float of second probe 5 is bigger than two probe diameters to make 2 floats and can not disturb two probes, the probe bottom is on same horizontal plane with 2 bottom surfaces of float. First probe 4, second probe 5 and the MCU microcontroller in the dish washer establish ties, MCU microcontroller electric connection alarm device, through the aquatic rise simultaneously contact first probe 4 and second probe 5 make its conduction current after to trigger the drain pump start of MCU microcontroller electrical control dish washer water, to the interior water evacuation in the dish washer prevent that water from spilling over.

The first probe 4 and the second probe 5 are conductive metal rod structures. The combination of float switch body 1 and float 2 is similar first switch, and the combination of first probe 4, second probe 5 is similar second switch, and above-mentioned two are equivalent to double-pole switch, and the water that washes the dishes is electrically conductive quality of water, consequently rises back contact two probes simultaneously, will lead to two probe switchings, and alarm device can select for use bee calling organ or the bulb of scintillation, sends out the police dispatch newspaper and realizes detecting. The dish washing water is manually cleaned in advance to prevent overflow.

In a further improvement, the first probe 4 and the second probe 5 are both of a telescopic conductive rod structure. The elongation of the first probe 4 and the second probe 5 can be self-adjusted according to the requirement of the user, and the self-adjustment is used for detecting different liquid levels. The conductive telescopic rod structure comprises a conductive metal sleeve which is in threaded connection with the wing plate, and a conductive metal rod which is suspended downwards in the conductive metal sleeve, wherein the conductive metal sleeve and the conductive metal rod are in threaded connection in a mutual insertion mode, so that the total length is adjusted. Set up the scale groove of observing regulation length on the electrically conductive metal pole, be convenient for observe regulation length on one side, adjust on the other side for the detection liquid level height after the regulation is more accurate.

The system block diagram of fig. 2 and the following determination methods: after the whole machine is powered on, the MCU starts to receive feedback signals and judges the feedback signals of the float switch or the metal probe, the MCU immediately sends out a control instruction as long as receiving any one of the feedback signals, the drainage pump control circuit works, the drainage pump is started to empty the water in the dish washing machine, and more water is prevented from overflowing. Meanwhile, the MCU sends an instruction to close other loads to operate, and the display interface displays an overflow fault and reminds a user to contact after-sale maintenance.

In addition, the overflow detecting device designed above can be used not only in a dishwasher, but also in other machines and equipment requiring overflow detection, such as a washing machine.

The working principle is as follows: increased two probes in the MCU microcontroller in original dish washer inside, even when float switch is inefficacy, utilize the first probe 4 of contact simultaneously behind the water come-up, second probe 5, just as first probe 4, the switch that second probe 5 is constituteed is just swelled by water and is switched on the closure like the switch, thereby trigger MCU microcontroller, recycle MCU microcontroller to drain pump control circuit work, the drain pump is opened, with the dish washer water evacuation, prevent that more water from spilling over.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims (9)

1. An overflow detection device comprises a float switch body (1) and a float (2) which are used for detecting overflow, wherein the float switch body (1) is arranged on a positioning frame (3); the method is characterized in that: the utility model discloses a water overflow alarm device, including positioning frame (3), locating frame, MCU microcontroller, locating frame, locating.

2. An overflow detecting device according to claim 1, wherein the first probe (4) and the second probe (5) can separately pass through a circular hole on the float (2), the first probe (4), the second probe (5) and the circular hole are not in contact, and the bottoms of the first probe (4) and the second probe (5) are on the same horizontal plane with the bottom surface of the float (2).

3. An overflow detecting device according to claim 1, wherein the two wings of the positioning frame (3) are detachably connected to the first probe (4) and the second probe (5) by screw threads, and the first probe (4) and the second probe (5) are respectively arranged on different wings.

4. An overflow detecting device as claimed in claim 1, wherein the first and second probes (4, 5) are made of conductive metal rod.

5. The overflow detection device of claim 1, wherein the first probe (4) and the second probe (5) are both telescopic conductive rod structures.

6. The overflow water detecting device of claim 5, wherein the conductive telescopic rod structure comprises a conductive metal sleeve screwed on the wing plate, and a conductive metal rod suspended downward in the conductive metal sleeve, and the total length of the conductive metal sleeve and the conductive metal rod is adjusted by adopting a mutual insertion type screw connection.

7. An overflow detecting device as claimed in claim 6, wherein the positioning frame (3) is of an insulating plastic frame structure.

8. The overflow detecting device of claim 7, wherein the conductive metal rod is provided with a scale groove for observing and adjusting the length.

9. A dishwasher comprising an overflow detecting means, characterized in that the overflow detecting means is the overflow detecting means as claimed in any one of claims 1 to 8.

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