阅读说明：本技术 回流阀、加水机构及含有该机构的电热水壶 (Reflux valve, water adding mechanism and electric kettle with same ) 是由 余俊忠 刘小明 余岳 沈滨杰 余铠佳 李璐佳 于 2019-11-29 设计创作，主要内容包括：发明公开了回流阀、含有该回流阀的加水机构及含有该加水机构的电热水壶；回流阀包括第一、二阀体,第一、二阀体分别具有第一、二端口,且两阀体相互密封并在其中形成腔室,特点是,腔室中设有压缩弹簧、活塞件及封闭件,封闭件安装在活塞件上,压缩弹簧通过作用活塞件带动封闭件封闭着第一端口,且腔室内部形成有活塞件被推至第二端口的过水通道。这样,电热水壶其壶体与壶座分离时,回流阀将关闭第一端口,同时,第二端口保持开启,让壶座中进水管道的剩余液体全部或部分快速流至回流阀内部。提供了另一种消除水滴可能滴落或泄漏至底座或平台、防止漏电产生的方案。(The invention discloses a reflux valve, a water adding mechanism containing the reflux valve and an electric kettle containing the water adding mechanism; the backflow valve comprises a first valve body and a second valve body, wherein the first valve body and the second valve body are respectively provided with a first port and a second port, the two valve bodies are mutually sealed and form a cavity, and the backflow valve is characterized in that a compression spring, a piston piece and a sealing piece are arranged in the cavity, the sealing piece is arranged on the piston piece, the compression spring drives the sealing piece to seal the first port by acting on the piston piece, and a water passing channel for pushing the piston piece to the second port is formed in the cavity. Therefore, when the kettle body of the electric kettle is separated from the kettle seat, the first port is closed by the reflux valve, and meanwhile, the second port is kept opened, so that all or part of residual liquid of the water inlet pipeline in the kettle seat can quickly flow into the reflux valve. Another solution is provided to eliminate the possibility of water drops dripping or leaking to the base or platform, preventing electrical leakage.)

1. A backflow valve comprises a first valve body and a second valve body, wherein the first valve body is provided with a first port, the second valve body is provided with a second port, the first valve body and the second valve body are sealed with each other and form a chamber, and the backflow valve is characterized in that a compression spring, a piston piece and a closing piece are arranged in the chamber, the compression spring acts on the piston piece, the closing piece is installed on the piston piece, the compression spring drives the closing piece to close the first port by acting on the piston piece, and a water passing channel for pushing the piston piece to the second port is formed in the chamber.

2. The reflux valve as set forth in claim 1, wherein a retainer ring is formed around the second port in the second valve body, the retainer ring having a gap; the first valve body is provided with a groove at the inner side of the sealing end; a plurality of bulges are formed on the proximal end surface of the second valve body of the piston piece, and gaps are formed among the bulges; the groove, the gap and the gap are used as a water passing channel for the piston piece to be pushed to the second port.

3. The reflux valve as set forth in claim 1, wherein a retainer ring is formed around the second port in the second valve body, the retainer ring defining a plurality of slits; the piston piece is provided with a through hole at the middle position; the closing piece is an I-shaped piece, two ends of the closing piece are provided with two closing surfaces, and the middle of the closing piece is provided with a cross bar; the closing piece is arranged in the through hole by the cross rod, so that a gap is formed between the cross rod and the through hole, and the closing surface can be attached to the through hole for closing; the through hole and the gap are used as a water passing channel for the piston piece to be pushed to the second port.

4. A water adding mechanism comprises a water pump, wherein the water pump pumps water from a water inlet pipe to a water outlet pipe; the method is characterized in that: a return pipe is connected between the water outlet pipe and the water inlet pipe; the return pipe is provided with a valve; the valve and the water pump form a connection relation that the water pump is opened and the valve is closed or the water pump is closed and the valve is opened; a return valve according to any one of claims 1 to 3 connected to the outlet pipe.

5. A watering mechanism according to claim 4, wherein the control of the valve and the water pump is either electrically or hydraulically operable, or one is electrically and the other is hydraulically operable.

6. The watering mechanism according to claim 5, wherein the valve is a solenoid valve, and further comprising a control device for electrically controlling the opening or closing of the water pump and the solenoid valve.

7. An electric kettle comprises a kettle body and a kettle seat, wherein the kettle body is provided with a water inlet channel, and the kettle seat is provided with a water inlet pipeline; characterized in that the kettle also comprises a watering mechanism of any one of the claims 4 to 6, wherein the watering mechanism is arranged in the kettle seat; in the water adding mechanism, the water outlet pipe is positioned at a position higher than the water inlet pipe; in the kettle seat, the water inlet pipeline is communicated with the second port, and the water inlet pipeline is positioned at a higher position than the second port.

8. The electric kettle according to claim 7, wherein the other end of the water inlet pipe is connected with a water tank.

Technical Field

The invention belongs to an electric kettle and accessories thereof, and relates to a valve suitable for feeding water from the upper part of a kettle seat through the bottom of the kettle body, in particular to a backflow valve capable of enabling residual water in a water inlet pipeline of the kettle seat to flow backwards when the kettle body is separated from the kettle seat, a water feeding mechanism containing the backflow valve and an electric kettle containing the water feeding mechanism.

Background

At present, an electric coupler is widely used in an electric kettle, and includes a lower coupler and an upper coupler, a plurality of annular metal electrodes are respectively arranged in the lower coupler and the upper coupler, and the upper coupler is inserted into the lower coupler to realize electric communication by the contact of the corresponding metal electrodes. The coupler not only can separate the upper coupler from the lower coupler to separate the kettle body from the kettle seat, but also can ensure that the kettle body can be inserted from any direction and is matched with the kettle seat, and has the characteristic of convenient use.

Along with the improvement of life of people, consumers put forward higher requirements on electric heating kettles, people hope that the water inlet of the electric heating kettles can be automatically controlled, namely, the water can be automatically added into the kettle body from the outside, therefore, people propose that a water inlet channel is arranged in a central opening of an upper coupler, a sealing sleeve and a valve are arranged in the water inlet channel, a water inlet pipeline is arranged in a central opening of a lower coupler, the sealing sleeve can be sleeved on a water inlet pipeline which is arranged on a kettle seat by a kettle body, the valve is pushed open by the water inlet pipeline, a water path from the water inlet pipeline to the water inlet channel is formed, further, people independently take out the sealing sleeve, the valve, the water inlet channel and the water inlet pipeline from an electric coupler to form an independent device and apply the independent device to the kettle, and the requirement that water enters the water inlet channel from the water.

Several relevant documents are presented below to reveal the current state of the art.

Chinese patent 201310051578.5 discloses a connector with a valve device, wherein the center of the lower connector is provided with a hole for water to pass through, and the center of the upper connector is provided with a sealing ring, a spring and a valve; when the connectors are separated, the valve is pressed by the spring from top to bottom, so that the corresponding opening is sealed, and water cannot flow downwards; when the upper connector is inserted into the lower connector, the sealing ring of the upper connector corresponding to the opening is tightly sleeved on the central opening of the lower connector, and the central opening of the lower connector is used for ejecting the valve to form a channel, so that water can flow into the upper connector from the lower connector.

The Chinese patent application 201310601175.3 discloses a cordless electric kettle with water added through a handle, wherein a water outlet is arranged on a base, a water inlet is arranged on a bottom cover of the kettle, a valve is arranged in the water inlet of the bottom cover, a water inlet pipeline is arranged in the water outlet of the base, the kettle body is placed on the base, and the water inlet of the bottom cover is correspondingly placed with the water outlet of the base, so that water enters the kettle body from the base through the water inlet of the bottom cover.

The Chinese patent application 201710223140.9 discloses a three-section connector, wherein a water inlet is arranged in an upper connector, a spring control valve is used for blocking the backflow of water in a kettle, a water outlet is arranged in a lower connector, a water inlet pipeline is sleeved in the spring, the water inlet pipeline can move up and down in a central hole of the lower connector, and when the upper connector is inserted into the lower connector, a water outlet port of the water inlet pipeline can be abutted against a sealing ring to form the communication of water paths of the upper connector and the lower connector.

Chinese utility model patent 201420495785.X discloses a water adding device of tea machine, and it adopts the solenoid valve to open the air inlet when adding water and finishing closing the water inlet to utilize the water pump will follow the inspiratory air of air inlet and come unnecessary raffinate in the evacuation trompil, let the raffinate get into the kettle body in the trompil.

Disclosure of Invention

The invention aims to provide a reflux valve, a water adding mechanism comprising the reflux valve and an electric kettle comprising the water adding mechanism, wherein when a water inlet channel is separated from a water inlet pipeline, a first port of the reflux valve can be closed by the reflux valve to prevent water from entering a valve body from the first port, and meanwhile, a second port of the reflux valve is kept opened to allow all or part of residual liquid in the water inlet pipeline to flow into the valve body, so that another scheme for eliminating possible dripping or leakage of water drops to a base or a platform and preventing electric leakage is provided.

The reflux valve of the invention is realized by the following scheme:

a backflow valve comprises a first valve body and a second valve body, wherein the first valve body is provided with a first port, the second valve body is provided with a second port, the first valve body and the second valve body are sealed with each other and form a chamber, and the backflow valve is characterized in that a compression spring, a piston piece and a closing piece are arranged in the chamber, the compression spring acts on the piston piece, the closing piece is installed on the piston piece, the compression spring drives the closing piece to close the first port by acting on the piston piece, and a water passing channel for pushing the piston piece to the second port is formed in the chamber.

Preferably, in the above-mentioned backflow valve, a check ring is formed around the second port inside the second valve body, and the check ring has a gap; the first valve body is provided with a groove at the inner side of the sealing end; a plurality of bulges are formed on the proximal end surface of the second valve body of the piston piece, and gaps are formed among the bulges; the groove, the gap and the gap can be used as a water passing channel which is pushed to the second port by the piston piece. Thus, when water pressure pushes the piston member to the second port, water may enter the gap from the groove through the gap and exit the second port from the gap.

Preferably, in the above-mentioned backflow valve, a retainer ring is formed around the second port inside the second valve body, and the retainer ring forms a plurality of gaps; the piston piece is provided with a through hole at the middle position; the closing piece is an I-shaped piece, two ends of the closing piece are provided with two closing surfaces, and the middle of the closing piece is provided with a cross bar; the closing piece is arranged in the through hole by the cross rod, so that a gap is formed between the cross rod and the through hole, and the closing surface can be attached to the through hole for closing; the through hole and the gap can be used as a water passing channel which is pushed to the second port by the piston piece. Thus, water pressure can overcome the spring force of the compression spring to press the piston member to the second port, the retainer ring can move the closure member a short distance so that the outer closure surface is disengaged from the through-hole, and water can flow from the through-hole out of the second port through the gap.

The water adding mechanism is realized by the following scheme:

a water adding mechanism comprises a water pump, wherein the water pump pumps water from a water inlet pipe to a water outlet pipe; the method is characterized in that: a return pipe is connected between the water outlet pipe and the water inlet pipe; the return pipe is provided with a valve; the valve and the water pump form a connection relation that the water pump is opened and the valve is closed or the water pump is closed and the valve is opened; the water outlet pipe is connected with the reflux valve.

Preferably, in the above water adding mechanism, the control of the valve and the water pump may be electric, hydraulic or one electric and the other hydraulic.

Preferably, in the water adding mechanism, the valve is an electromagnetic valve, and the water adding mechanism further comprises a control device, and the control device is used for electrically controlling the opening or closing of the water pump and the electromagnetic valve.

The electric kettle of the invention is realized by the following scheme:

an electric kettle comprises a kettle body and a kettle seat, wherein the kettle body is provided with a water inlet channel, and the kettle seat is provided with a water inlet pipeline; the water adding mechanism is arranged in the kettle seat; in the water adding mechanism, the water outlet pipe is positioned at a position higher than the water inlet pipe; in the kettle seat, the water inlet pipeline is communicated with the second port, and the water inlet pipeline is positioned at a higher position than the second port.

Preferably, in the electric kettle, the other end of the water inlet pipe is connected with the water tank.

Like this, when the kettle body is placed on the kettle seat, inlet channel and inlet channel intercommunication, at this moment, if open the water pump, the water pump will be taken water from the inlet tube to the outlet pipe, and under hydraulic effect, will overcome compression spring's elasticity, make the piston spare remove, let the closure spare leave first port earlier, water can get into the cavity from first port, afterwards, the piston spare will be pressed to the second port, then, water will continue to get into the backward flow valve cavity to flow out from the second port by water channel, through inlet channel and get into in the kettle body. When the water pump is closed, water is stopped to enter the water pump and the valve is opened, the rest water in the water outlet pipe flows to the water inlet pipe through the backflow pipe, and can flow to the water return tank through the water inlet pipe.

Preferably, in the electric kettle, the kettle base is provided with a pair of contact switches, the contact switches are limited by the kettle body, and the water pump is limited by the communication of the contact switches.

Therefore, when the kettle body is placed on the kettle seat, the contact switch is communicated in a contact way, and if the switch of the water pump is also turned on, the power supply supplies power to the water pump; if the switch of the water pump is turned on, the contact switch is disconnected when the kettle body is lifted or separated from the kettle seat, and at the moment, the power supply stops supplying power to the water pump, so that the occurrence of an accident situation can be avoided.

According to the reflux valve, the water adding mechanism and the electric kettle comprising the same, as two passages are formed in the water adding mechanism, and the water pump and the valves are opened and closed in turn, water can be pumped from the water inlet pipe to the water outlet pipe from the water tank through the water pump during water inlet, and is delivered to the interior of the kettle body through the water inlet pipeline and the water inlet channel through the reflux valve, so that the water adding function is completed; when the water pump is closed and water is stopped to be added, and the valve is opened, the closing piece seals the first port under the action of the compression spring through the piston piece, water is prevented from continuously entering the valve body through the first port, water in the water outlet pipe can flow back to the water inlet pipe through the return pipe and flows into the water tank, meanwhile, residual water in the water inlet pipeline completely or partially flows back to the valve body through the second port, the water level of the residual water in the water inlet pipeline is lowered, and the effect that water drops cannot overflow or leak out in the water inlet pipeline when the kettle body is lifted up or separated from the kettle seat can be achieved.

According to the reflux valve, the water adding mechanism and the electric kettle with the mechanism, when the water pump is closed and water adding is stopped and the valve is opened, the sealing member in the reflux valve seals the first port under the action of the compression spring through the piston member, and meanwhile, most of liquid in the valve body can be discharged from the first port to the water outlet pipe, flows into the water inlet pipe through the reflux pipe and flows back to the water tank, so that enough space can be vacated in the valve body of the reflux valve, negative pressure is formed in the space, and all or most of residual water in the water inlet pipeline can flow to the valve body through the second port.

This backflow valve, add water mechanism and contain electric kettle of this mechanism, when closing the water pump and stopping to add water, the back flow is opened immediately to the valve, and simultaneously, piston spare can react rapidly under compression spring effect in the backflow valve, move rapidly and extrude the valve body with a large amount of water from first port to first port, for remaining water gets into the valve body and has prepared the space rapidly in the inlet channel, make remaining water can flow into the valve body from the second port rapidly in the inlet channel, have the effect of accelerating the inlet channel water backward flow.

In addition, the electric kettle created by the invention has the advantages that the kettle seat is provided with the pair of contact switches, the contact conduction of the contact switches is limited by the effect of the kettle body, and the opening of the water pump is limited by the conduction of the contact switches, so that the contact switches are disconnected by any lifting operation of the kettle body, the work of the water pump can be cut off, and the phenomenon of spraying caused by the continuous work of the water pump is prevented.

Drawings

FIG. 1 is a schematic view of a split configuration of one embodiment of the reflux valve of the present invention;

FIG. 2 is a schematic diagram of a cross-sectional view of the backflow valve assembly of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the operating state of the reflux valve of FIG. 2;

FIG. 4 is a schematic view of the structure of the water adding mechanism of the present invention;

FIG. 5 is a schematic view of the structure of the electric kettle of the present invention;

FIG. 6 is a schematic view of a split configuration of another embodiment of the reflux valve of the present invention;

FIG. 7 is a schematic illustration in cross-section of the backflow valve assembly of FIG. 6;

FIG. 8 is a schematic cross-sectional view of the operating state of the return valve of FIG. 7;

FIG. 9 is a schematic view of another water adding mechanism of the present invention;

fig. 10 is a schematic view of another electric kettle structure of the present invention.

Detailed Description

The following description of embodiments of the invention refers to the accompanying drawings: