Three-way valve, water injection mechanism of three-way valve and electric heating tea tray

Abstract

The three-way valve is characterized in that the three-way valve comprises a horizontal communicating piece and a vertical communicating piece, the interiors of two end openings A and B of the horizontal communicating piece are both necked-down openings, the two ends a and b of a sealing piece both form closed parts, and the sealing piece is located in the horizontal communicating piece and can move in the horizontal communicating piece; the closing part a or b is used for respectively blocking the necking of the corresponding port A or B, so that the closing part b or a is separated from the necking of the corresponding port B or A, and the port B or A is communicated with the port of the vertical communicating piece; the water injection mechanism comprises a reflux water pump and a three-way valve; and heating appliance bases on the electric heating tea tray are respectively connected with a reflux water pump through a water injection mechanism. According to the scheme, the negative pressure generated by the backflow water pump of the use appliance is utilized, the structure of the three-way valve is combined, and a temporary water channel is automatically built for the use appliance, so that the appliances can share the same water container through one hose.

Description

Technical Field

[0001] The present invention belongs to household electric heating appliances and their accessories, and relates to a liquid heater that satisfies the detachable connection between a kettle body and a kettle base. More specifically, it is an electric tea tray and its accessories suitable for adding water to the kettle body from the bottom. Background Art

[0002] Currently, electric couplers have been widely used in electric kettles. It includes an upper coupler and a lower coupler. Multiple annular metal electrodes are arranged in the upper coupler and the lower coupler. The insertion of the upper coupler into the lower coupler makes the corresponding metal electrodes contact to form electrical conduction. This kind of coupler can not only satisfy the separation of the upper and lower couplers to realize the separation of the kettle body and the kettle base, but also satisfy that the bottom of the kettle body can be inserted from any angle and adapted to the kettle base, having the very convenient characteristic in use.

[0003] With the improvement of living standards, consumers have continuously put forward higher requirements for electric kettles. People hope that the water inlet of the electric kettle can also be automatically controlled, that is, it can automatically inject water into the kettle body from the outside. For this purpose, people have proposed to set a water inlet channel in the central opening of the upper coupler and a water inlet pipe in the central opening of the lower coupler. When the kettle body is placed on the kettle base, the water inlet channel is connected to the water inlet pipe to realize the requirement of automatically adding water from the bottom kettle base to the upper kettle body.

[0004] In daily life, for the need of boiling water or making beverages, people also gather multiple utensils together and assemble them on a tea tray with a platform. For example, some tea leaves only need to be brewed with boiling water to meet the requirement of brewing and drinking multiple times, but some tea leaves need to be steamed to let their effective ingredients precipitate. In addition, the tea cups also need to be boiled and disinfected from time to time. All of these require multiple utensils on the platform to meet different requirements of people.

[0005] The following gives several related documents to reveal the current development status of the relevant technology.

[0006] Chinese Patent Invention 201310051578.5 discloses a connector with a one-way valve device. It has a central opening in the lower connector for water to pass through, and a corresponding central opening in the upper connector with a sealing ring, a spring and a one-way valve installed; when the connector is separated, the one-way valve is pressed down by the spring from top to bottom, thus closing the corresponding hole position and preventing water from flowing down; when the upper connector is inserted into the lower connector, the sealing ring of the corresponding opening of the upper connector tightly sleeves the central opening of the lower connector, and the central opening of the lower connector can push open the one-way valve to form a channel, allowing water to flow from the lower connector into the upper connector.

[0007] Chinese Patent Application for Invention 201310601175.3 discloses a cordless electric kettle with water added through a handle. It has a water outlet provided at the base, a water inlet provided at the bottom cover of the kettle, a one-way valve is provided in the bottom cover water inlet, a water inlet pipe is provided in the base water outlet, the kettle body is placed on the base, and the bottom cover water inlet corresponds to the base water outlet, so as to realize that water enters the kettle body from the base through the bottom cover water inlet.

[0008] Chinese Patent Application for Invention 201710223140.9 discloses a three-stage connector. A water inlet is provided in the upper connector, and a one-way valve controlled by a spring blocks the backflow of water in the kettle. A water outlet is provided in the lower connector, and the water inlet pipe is sleeved in the spring, so that the water inlet pipe can move up and down in the central hole of the lower connector. When the upper connector is inserted into the lower connector, the water outlet port of the water inlet pipe can abut against the sealing ring to form the connection of the water circuits of the upper and lower connectors.

[0009] Chinese Utility Model Patent 201420495785.X discloses a water adding device for a tea-making machine. It uses a solenoid valve to open the air inlet while closing the water inlet at the end of water adding, and uses a water pump to suck the air inhaled from the air inlet to drain the excess residual liquid in the opening, so that the residual liquid in the opening can also enter the kettle body.

[0010] Chinese Patent Application for Invention 2018107028059 discloses a water connector, an electrical coupler and an electric kettle thereof. It connects a telescopic tube below the water inlet pipe. The water inlet channel presses down the water inlet pipe to make it move downward and compress the telescopic tube. When the water inlet channel is separated from the water inlet pipe, it moves upward to reset the telescopic tube, and can suck the water in the upper part of the water inlet pipe to the lower part of the water inlet pipe to eliminate the water droplets in the upper part of the water inlet pipe.

[0011] Chinese Patent Application for Invention 2019112006054 discloses a reflux valve, a water adding mechanism and an electric kettle containing the mechanism. It installs a reflux pipe and a valve between the water inlet pipe and the water outlet pipe of the water pump. The valve and the water pump form a relationship that the water pump is opened while the valve is closed or the water pump is closed while the valve is opened, and a reflux valve is installed on the water outlet pipe, so that when the water pump stops working, the remaining water in the water outlet pipe can flow back to the water inlet pipe through the reflux valve and the reflux pipe.

[0012] Chinese Utility Model Patent 202022183316.2 discloses an electric tea kettle. It can heat water to boiling by a heater and use steam to spray the tea leaves in the cup to make the tea leaves release effective ingredients. It supplies water to the water inlet pipe by a water pump and uses the water pump to stop water inlet as a reflux channel for the remaining water, so that the remaining water can flow back to the water tank.

[0013] In the prior art, when the upper and lower parts are separated, there is usually excess water left in the central opening or the water inlet pipe at the lower part. This remaining water is likely to form water droplets and fall into the interior of the base. If not drained in time, it will cause water accumulation, overflow, and intrusion into the electrodes, leading to the risk of electric leakage. Therefore, people usually set a drip outlet on the base so that when water droplets fall on the base, they can be drained from the outlet in time. However, this does not fundamentally prevent the possible intrusion of water, and the structure of the solution in the above-mentioned literature is also relatively complex.

[0014] In addition, when multiple appliances are concentrated together and their respective bases are installed on a platform, there is also the problem that the water tank supplies water to different appliances through the bases of each appliance. If a water storage container is configured for each appliance, it is neither practical nor space-saving and will affect the appearance. Even if they can share a water storage container, the water pumps configured at the bases of each appliance must be connected to the water storage container by hoses, and their connecting hoses often get entangled, are easily bent and blocked, and look very messy.

[0015] The object of the present invention is to provide a three-way valve, its water injection mechanism, and an electric tea tray. The three-way valve can achieve communication with different ports, inject water from the same water storage container to different appliances, and enable the remaining water in the water inlet pipe of the corresponding appliance base to flow back to the water storage container when the water injection stops.

[0016] The three-way valve of the present invention is realized by the following solution: A three-way valve, in a T shape, includes a horizontal connecting member and a vertical connecting member. Its feature is that both ends A and B of the horizontal connecting member have reduced openings inside. Both ends a and b of the sealing member form closed parts, and the sealing member is located in the horizontal connecting member. The sealing member can move in the horizontal connecting member, and the corresponding reduced opening of port A or B can be blocked by the closed part a or b respectively, while the closed part b or a is separated from the reduced opening of the corresponding port B or A to make the port B or A communicate with the port of the vertical connecting member.

[0017] In this way, when the port A of the horizontal connecting member is subjected to a negative pressure, the sealing member can move towards the port A, the closed part a will leave the reduced opening of the port A, making the port A communicate with the port of the vertical connecting member. At the same time, the closed part b will block the reduced opening of the port B to make it closed and unable to communicate with the port of the vertical connecting member; when the port B of the horizontal connecting member is subjected to a negative pressure, the sealing member can move towards the port B, the closed part b will leave the reduced opening of the port B, making the port B communicate with the port of the vertical connecting member. At the same time, the closed part a will block the reduced opening of the port A to make it closed and unable to communicate with the port of the vertical connecting member.

[0018] Thus, when the three-way valve is used for water inlet, the water inlet pipe is connected to the port of the vertical connecting member, and a negative pressure can be applied at port A or B. At this time, water can be led from the port of the vertical connecting member to port A or B where the negative pressure is applied. This three-way valve can be used to select the water inlet path of the water flow.

[0019] The water injection mechanism of the present invention can be realized by the following first solution: A water injection mechanism includes two return water pumps. Its characteristic is that it also includes the above-mentioned three-way valve. Among them, the two ports A and B of the horizontal connecting member are respectively connected to the water inlet ends of the two return water pumps.

[0020] In this way, when one of the return water pumps works, a negative pressure can be generated at the corresponding port where it is installed. Since this port is connected to the port of the vertical connecting member, the water in the water inlet pipe can be introduced through the port of the vertical connecting member and guided to this port. Therefore, the mechanism has the function of allowing people to choose to use the return water pump and automatically matching the water inlet path.

[0021] In addition, when the return water pump stops working, no negative pressure is generated at the corresponding port where it is installed. At this time, the remaining water at the water outlet end of the return water pump can flow back along the original route through the water inlet end of the return water pump and the corresponding port of the horizontal connecting member to the port of the vertical connecting member, enabling the mechanism to also have the function of guiding and collecting the remaining water.

[0022] The water injection mechanism of the present invention can be realized by the following second solution: A water injection mechanism includes three return water pumps. Its characteristic is that it also includes two of the above-mentioned three-way valves. Among them, one port of the horizontal connecting member of the first three-way valve is connected to the port of the vertical connecting member of the second three-way valve, and the two ports of the horizontal connecting member of the second three-way valve and the other port of the horizontal connecting member of the first three-way valve are respectively connected to the water inlet ends of the three return water pumps.

[0023] In this way, if the return water pump selected to work is directly connected to the port of the horizontal connecting member of the first three-way valve, then open this port of the horizontal connecting member of the first three-way valve, and the other port of the horizontal connecting member of the first three-way valve is closed, making the opened port communicate with the port of the vertical connecting member of the first three-way valve. Water can be introduced through the port of the vertical connecting member of the first three-way valve and guided to this port; if the return water pump selected to work is connected to the port of the horizontal connecting member of the second three-way valve, then open the corresponding installed port of the horizontal connecting member of the second three-way valve, and open this port on the same side of the horizontal connecting member of the first three-way valve through the port of the vertical connecting member of the second three-way valve, making the opened port communicate with the port of the vertical connecting member of the first three-way valve. Water can be introduced through the port of the vertical connecting member of the first three-way valve and guided to the port corresponding to the return water pump selected to work. Therefore, the mechanism also provides the function of allowing people to choose to use the return water pump and automatically matching the water inlet path.

[0024] In addition, when the selected return water pump stops working, no negative pressure is generated at the corresponding installed port. At this time, the water inlet path still exists, and the remaining water at the water outlet end of the selected return water pump can flow back along the original path to the vertical connection port of the first three-way valve, enabling the mechanism to also play a role in guiding and collecting the remaining water.

[0025] The water injection mechanism of the present invention can also be implemented by the following third solution: A water injection mechanism includes four return water pumps. Its characteristic is that it further includes three of the above-mentioned three-way valves. Among them, the two vertical connection ports of the first three-way valve and the second three-way valve are respectively connected to the two horizontal connection ports of the third three-way valve, and the four horizontal connection ports of the first three-way valve and the second three-way valve are respectively connected to the four water inlet ends of the four return water pumps.

[0026] In this way, a certain return water pump can be made to work. The operation of the first three-way valve or the second three-way valve on the same side and the opening of the corresponding horizontal connection port of the first three-way valve or the second three-way valve are determined by the position of the corresponding installed port of the return water pump, and then the corresponding horizontal connection port of the third three-way valve is also opened.

[0027] Thus, when a certain return water pump is selected to work, a water inlet path is formed from the vertical connection port of the third three-way valve, the corresponding horizontal connection port of the third three-way valve, the vertical connection port of the corresponding first three-way valve or second three-way valve on the same side, the corresponding horizontal connection port of the corresponding first three-way valve or second three-way valve on the same side, and the selected return water pump. The mechanism also provides the function of allowing people to select a return water pump and automatically matching the water inlet path.

[0028] In addition, when the selected return water pump stops working, no negative pressure is generated at the corresponding installed port. At this time, the water inlet path still exists, and the remaining water at the water outlet end of the selected return water pump can flow back along the original path to the vertical connection port of the third three-way valve, enabling the mechanism to also play a role in guiding and collecting the remaining water.

[0029] The electric tea tray of the present invention is implemented by the following solution: An electric tea tray includes a platform and two heating appliance bases installed on the platform. Its characteristic is that it further includes the water injection mechanism of the above-mentioned first solution, and the water inlets of the two heating appliance bases are respectively connected to the water outlet ends of the two return water pumps.

[0030] In this way, when the vertical connecting part port of the three-way valve is connected to the water storage container located below, the operation of the return water pump can be selected according to the use of the appliance. Based on the operation of the return water pump, the corresponding port of the horizontal connecting part can be selected to open, and the water flow direction is determined. Thus, a temporary water flow path can be constructed according to the use of the appliance, enabling two heating appliances to share the same water storage container.

[0031] The electric tea tray of the present invention can also be realized by the following solution: An electric tea tray includes a platform and three heating appliance bases installed on the platform. Its characteristic is that it also includes the water injection mechanism of the above second solution, and the water inlets of the three heating appliance bases are respectively connected to the water outlet ends of three return water pumps.

[0032] In this way, when the vertical connecting part port of the first three-way valve is connected to the water storage container located below, the operation of the return water pump can be selected according to the use of the appliance. Based on the operation of the return water pump, the corresponding port of the horizontal connecting part can be selected to open, and the water flow direction is determined. Thus, a temporary water flow path can be constructed according to the use of the appliance, enabling three heating appliances to share the same water storage container.

[0033] The electric tea tray of the present invention can also be realized by the following solution: An electric tea tray includes a platform and four heating appliance bases installed on the platform. Its characteristic is that it also includes the water injection mechanism of the above third solution, and the water inlets of the four heating appliance bases are respectively connected to the water outlet ends of four return water pumps.

[0034] In this way, when the vertical connecting part port of the third three-way valve is connected to the water storage container located below, the operation of the return water pump can be selected according to the use of the appliance. Based on the operation of the return water pump, the corresponding port of the horizontal connecting part can be selected to open, and the water flow direction is determined. Thus, a temporary water flow path can be constructed according to the use of the appliance, enabling four heating appliances to share the same water storage container.

[0035] For the three-way valve, its water injection mechanism and the electric tea tray of the present invention, only by setting a sealing member at the horizontal connecting part, it can automatically match the selected heating appliance or return water pump for use, and can utilize the negative pressure generated by it to open one port of the closed part of the sealing member and block the other port to construct a temporary water inlet path, and realize water inlet for the selected heating appliance or return water pump. Its structure is not only effective but also very simple.

[0036] The three-way valve, its water injection mechanism and electrothermal tea tray of the present invention can form a connection between a certain port of the horizontal connecting member and the port of the vertical connecting member when a negative pressure is applied to the certain port of the horizontal connecting member. Thus, an inlet path can be temporarily constructed according to the operation of the selected heating appliance or the return water pump, so as to inject water from the same water storage container into the selected heating appliance. Therefore, multiple heating appliances can share the same water storage container.

[0037] For the three-way valve, its water injection mechanism and electrothermal tea tray of the present invention, when the application of negative pressure at a certain port of the horizontal connecting member stops, the temporarily constructed inlet path between it and the port of the vertical connecting member during the application of negative pressure still exists. Thus, it can be used as a return path for the remaining water of the selected heating appliance or the return water pump, so that each heating appliance or each return water pump can recycle its remaining water to the water storage container after the water inlet stops. Brief Description of the Drawings

[0038] Figure 1 It is a schematic cross-sectional view of a specific implementation structure of the inventive three-way valve; Figure 2 It is Figure 1 A schematic cross-sectional view of the assembled three-way valve; Figure 3 It is a schematic view of the first specific implementation structure of the inventive water injection mechanism; Figure 4 It is a schematic view of the second specific implementation structure of the inventive water injection mechanism; Figure 5 It is a schematic view of the third specific implementation structure of the inventive water injection mechanism; Figure 6 It is a schematic view of a specific implementation structure of the inventive electrothermal tea tray; Figure 7 It is a schematic view of another specific implementation structure of the inventive electrothermal tea tray; Figure 8 It is a schematic view of yet another specific implementation structure of the inventive electrothermal tea tray. Detailed Description of the Invention

[0039] Referring to Figure 1 , the three-way valve is in a T shape and includes a vertical connecting member 1 and a horizontal connecting member 2. Its three ports A, B, and C are all interconnected. Among them, the two ports A and B at both ends of the horizontal connecting member are both constricted inside. Both ends a and b of the seal 3 form closed parts, and the seal 3 is located in the horizontal connecting member 2. The seal 3 can move in the horizontal connecting member 1. The closed part a blocks the corresponding port A, and the closed part b is separated from the corresponding port B to keep the port B connected to the port C of the vertical connecting member. Or the closed part b blocks the constriction of the corresponding port B, and the closed part a is separated from the constriction of the corresponding port A to keep the port A connected to the port C of the vertical connecting member.

[0040] Referring to Figure 2, the seal 3 can be made of silicone rubber. It is located in the housing, and the reserved length is stretched and cut off after being made.

[0041] Referring to Figure 3 , the first water injection mechanism includes Figure 1 the three-way valve and two return water pumps shown in the figure. Among them, the two ports A and B of the horizontal connecting piece are respectively connected to the water inlet ends 41a and 42b of the two return water pumps 41 and 42.

[0042] In this way, by selecting one of the return water pumps 41 or 42 to work, water can be sent from the port C of the vertical connecting piece to their respective return water pumps 41 and 42.

[0043] When the return water pump 41 is selected to work, negative pressure can be generated at the installed port A. At this time, this port A is connected to the port C of the vertical connecting piece. Through the port C of the vertical connecting piece, water can be introduced, guided to this port A, enter the return water pump 41, and be sent to the water outlet end 41c of the return water pump 41.

[0044] When the return water pump 41 stops working, negative pressure is no longer generated at its corresponding installed port A. At this time, the remaining water at the water outlet end 41c of the return water pump 41 can flow back to the port C of the vertical connecting piece along the original route through the return water pump 41 and the port A of the horizontal connecting piece.

[0045] When the return water pump 42 is selected to work, negative pressure can be generated at the installed port B. At this time, this port B is connected to the port C of the vertical connecting piece. Through the port C of the vertical connecting piece, water can be introduced, guided to this port B, enter the return water pump 42, and be sent to the water outlet end 42d of the return water pump 42.

[0046] When the return water pump 42 stops working, negative pressure is no longer generated at its corresponding installed port B. At this time, the remaining water at the water outlet end 42d of the return water pump 42 can flow back to the port C of the vertical connecting piece along the original route through the return water pump 42 and the port B of the horizontal connecting piece.

[0047] Therefore, when negative pressure is generated at one end port of the horizontal connecting piece, that end port will form a connection with the port of the vertical connecting piece.

[0048] Thus, the mechanism has the function of allowing people to select and use the return water pump and temporarily automatically constructing the water inlet and the path for recycling the remaining water.

[0049] Referring to Figure 4 , the second water injection mechanism includes two Figure 1A three-way valve and three return water pumps. Among them, for the first three-way valve 31, its horizontal connecting part port 31A is connected to the vertical connecting part port 32C of the second three-way valve 32. For the second three-way valve 32, its two horizontal connecting part ports 32A and 32B and the horizontal connecting part port 31B of the first three-way valve are respectively connected to the water inlet ends of three return water pumps 40, 41, and 42.

[0050] The specific working conditions are as follows: If the selected return water pump for operation is 40, then open port 31B and close port 31A, so that port 31B is connected to port 31C. Water can be introduced through port 31C and directed to port 31B to supply water to the return water pump 40.

[0051] If the selected return water pump for operation is 41, then open port 32A and close port 32B, and open port 31A and close port 31B through port 32C, so that port 31A is connected to port 31C. Thus, water can be introduced through port 31C and directed to the port corresponding to the water inlet end 41a of the selected return water pump 41 for operation through port 31A, port 32C, and port 32A. Additionally, when the selected return water pump 41 stops working, at this time, the remaining water at the water outlet end 41c of the selected return water pump 41 can still flow back to port 31C along the original path through port 32A, port 32C, and port 31A.

[0052] If the selected return water pump for operation is 42, then open port 32B and close port 32A, and open port 31A and close port 31B through port 32C, so that port 31B is connected to port 31C. In this way, water can be introduced through port 31C and directed to the port corresponding to the water inlet end 42b of the selected return water pump 42 for operation through port 31A, port 32C, and port 32B. Additionally, when the selected return water pump 42 stops working, at this time, the remaining water at the water outlet end 42d of the selected return water pump 42 can still flow back to port 31C along the original path through port 32B, port 32C, and port 31A.

[0053] Therefore, the mechanism also provides people with the option to select and use return water pumps, automatically matches the water inlet path, and also has the functions of guiding and collecting the remaining water.

[0054] Refer to Figure 5 and the third water injection mechanism includes three Figure 1The shown three-way valves 31, 32, 33 and four reflux pumps 40, 41, 42, 43, wherein, for the first three-way valve 32 and the second three-way valve 33, their two vertical connecting part ports are respectively connected to the two horizontal connecting part ports 31A, 31B of the third three-way valve 31, and for the first three-way valve 32 and the second three-way valve 33, their four horizontal connecting part ports 32A, 32B, 33A, 33B are respectively connected to the four water inlet ends 41a, 42b, 40e, 43h of the four reflux pumps.

[0055] In this way, when selecting the reflux pump 41 or 42 to work, the first three-way valve 32 can be selected to work according to the position of the reflux pump, so that the corresponding installed horizontal connecting part port 32A or 32B of the first three-way valve 32 is opened, and then the corresponding port 31A of the horizontal connecting part of the third three-way valve 31 is also opened. Thus, a water flow path can be temporarily and automatically constructed from the vertical connecting part port 31C of the third three-way valve 31 to the corresponding reflux pump 41 or 42; when selecting the reflux pump 40 or 43 to work, the second three-way valve 33 can be selected to work according to the position of the reflux pump, so that the corresponding installed horizontal connecting part port 33A or 33B of the second three-way valve 33 is opened, and then the corresponding port 31B of the horizontal connecting part of the third three-way valve 31 is also opened. Thus, a water flow path can be temporarily and automatically constructed from the vertical connecting part port 31C of the third three-way valve 31 to the corresponding reflux pump 40 or 42; in addition, when selecting the reflux pump to stop working, the remaining water can flow from the water outlet end of the reflux pump through the water inlet end of the reflux pump and return to the vertical connecting part port 31C of the third three-way valve 31 through the originally temporarily constructed water flow path.

[0056] The specific working conditions are as follows: If the selected working reflux pump is 41, then the port 32A is opened and the port 32B is closed, and the port 31A is opened and the port 31B is closed through the port 32C, so that the port 31A is communicated with the port 31C. Thus, water can be introduced from the port 31C, through the port 31A, the port 32C, the port 32A, and be guided to the port corresponding to the water inlet end 41a of the selected working reflux pump 41. In addition, when the reflux pump 41 stops working, its remaining water can flow from the water outlet end 41C of the reflux pump 41 through the water inlet end 41a of the reflux pump 41, and return to the port 31C through the port 32A, the port 32C, the port 31A.

[0057] If the selected return water pump for operation is 42, then open port 32B and close port 32A, and open port 31A and close port 31B through port 32C to connect port 31A with port 31C. Thus, water can be introduced from port 31C, pass through port 31A, port 32C, and port 32B, and be directed to the port corresponding to the water inlet end 42b of the selected return water pump 42 for operation. Additionally, when the return water pump 42 stops operating, the remaining water can flow from the water outlet end 42d of the return water pump 42 through the water inlet end 42b of the return water pump 42, and return to port 31C through port 32B, port 32C, and port 31A.

[0058] If the selected return water pump for operation is 40, then open port 33A and close port 33B, and open port 31B and close port 31A through port 33C to connect port 31B with port 31C. Thus, water can be introduced from port 31C, pass through port 31B, port 33C, and port 33A, and be directed to the port corresponding to the water inlet end 40e of the selected return water pump 40 for operation. Additionally, when the return water pump 40 stops operating, the remaining water can flow from the water outlet end 40f of the return water pump 40 through the water inlet end 40e of the return water pump 40, and return to port 31C through port 33A, port 33C, and port 31B.

[0059] If the selected return water pump for operation is 43, then open port 33B and close port 33A, and open port 31B and close port 31A through port 33C to connect port 31B with port 31C. Thus, water can be introduced from port 31C, pass through port 31B, port 33C, and port 33B, and be directed to the port corresponding to the water inlet end 43h of the selected return water pump 43 for operation. Additionally, when the return water pump 43 stops operating, the remaining water can flow from the water outlet end 43g of the return water pump 43 through the water inlet end 43h of the return water pump 43, and return to port 31C through port 33B, port 33C, and port 31B.

[0060] Therefore, the mechanism also has a return water pump for people to select and use, and can temporarily and automatically construct its water flow path to complete water inlet and realize the recovery of remaining water by selecting the return water pump.

[0061] The return water pumps mentioned in the above first, second, and third water injection mechanisms can select the water pump in a Chinese utility model patent 202022183316.2 for an electric tea kettle.

[0062] Refer to Figure 6 , the electric tea tray includes a platform 5 and two heating appliance bases 6 installed on the platform 5, and also includes Figure 3 a water injection mechanism, and the water inlets of the two heating appliance bases are respectively connected to the water outlet ends of two return water pumps.

[0063] In this way, when the vertical connecting member port C is connected to the water storage container located below, the return water pumps 41 or 42 can be selected to work according to the use of the appliance. By the operation of the return water pumps 41 or 42, the corresponding ports A and B of the horizontal connecting member are selected to be opened, and the flow direction of the water is determined. Thus, a water flow path can be temporarily and automatically constructed according to the use of the appliance, enabling two heating appliances to share the same water storage container.

[0064] Referring to Figure 7 , the electric tea tray includes a platform 5 and three heating appliance bases 6 installed on the platform 5, and also includes Figure 4 a water injection mechanism, and the water inlets of the three heating appliance bases are respectively connected to the water outlet ends of the three return water pumps.

[0065] In this way, when the first three-way valve 31 vertical connecting member port 31C is connected to the water storage container located below, the return water pumps 40, 41, and 42 can be selected to work according to the use of the appliance. By the operation of the return water pumps 40, 41, and 42, the corresponding ports of the horizontal connecting member are selected to be opened, and the flow direction of the water is determined. Thus, a water flow path can be temporarily and automatically constructed according to the use of the appliance, enabling three heating appliances to also share the same water storage container.

[0066] Referring to Figure 8 , the electric tea tray includes a platform 5 and four heating appliance bases 6 installed on the platform 5, and also includes Figure 5 a water injection mechanism, and the water inlets of the four heating appliance bases are respectively connected to the water outlet ends of the four return water pumps.

[0067] In this way, when the third three-way valve 31 vertical connecting member port 31C is connected to the water storage container located below, the return water pumps 40, 41, 42, and 43 can be selected to work according to the use of the appliance. By the operation of the return water pumps 40, 41, 42, and 43, the corresponding ports of the horizontal connecting member are selected to be opened, and the flow direction of the water is determined. Thus, a water flow path can be temporarily and automatically constructed according to the use of the appliance, enabling four heating appliances to also share the same water storage container.

[0068] From the above three embodiments of the electric teapot, it can be seen that by using the negative pressure generated by the return water pump of the appliance in use and combining the characteristics of the three-way valve structure, a temporary water passage can be automatically built for the appliance in use to supply water and recycle the remaining water, enabling multiple appliances to share a water container. In particular, only one hose can be used to draw water from the water container or recycle the remaining water back to the water container to meet the use of each appliance, thus demonstrating its advantages.

Claims

1. A three-way valve, in a T shape, includes a horizontal connecting member and a vertical connecting member, characterized in that, Both ports A and B of the horizontal connecting member have reduced openings inside. Both ends a and b of the seal form closed portions, and the seal is located in the horizontal connecting member. The seal can move in the horizontal connecting member, and the reduced opening of the corresponding port A or B is blocked by the closed portion a or b of the seal, while the closed portion b or a is separated from the reduced opening of the corresponding port B or A to keep the port B or A in communication with the port of the vertical connecting member.

2. A water injection mechanism, comprising two reflux water pumps, characterized in that, It further includes the three-way valve described above. Among them, the two ports A and B of the horizontal connecting member are respectively connected to the water inlet ends of two return water pumps.

3. A water injection mechanism, comprising three return water pumps, characterized in that, It further includes two three-way valves described above. Among them, one port of the horizontal connecting member of the first three-way valve is connected to the port of the vertical connecting member of the second three-way valve, and the two ports of the horizontal connecting member of the second three-way valve and the other port of the horizontal connecting member of the first three-way valve are respectively connected to the water inlet ends of three return water pumps.

4. A water injection mechanism includes four return water pumps. Characteristically, it further includes three of the above-mentioned three-way valves, wherein, The two ports of the vertical connecting members of the first three-way valve and the second three-way valve are respectively connected to the two ports of the horizontal connecting member of the third three-way valve, and the four ports of the horizontal connecting members of the first three-way valve and the second three-way valve are respectively connected to the four water inlet ends of four return water pumps.

5. An electric tea tray, comprising a platform and two heating appliance bases mounted on the platform, characterized in that, It further includes the water injection mechanism of claim 2. The water inlet ports of two heating appliance bases are respectively connected to the water outlet ends of two return water pumps.

6. An electric tea tray, comprising a platform and three heating appliance bases installed on the platform, characterized in that, It further includes the water injection mechanism of claim 3. The water inlet ports of three heating appliance bases are respectively connected to the water outlet ends of three return water pumps.

7. An electric tea tray, comprising a platform and four heating appliance bases installed on the platform, characterized in that, It further includes the water injection mechanism of claim 4. The water inlet ports of four heating appliance bases are respectively connected to the water outlet ends of four return water pumps.

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