A water system for electric steamer and a control method thereof and electric steamer

Abstract

The present invention relates to the technical field of kitchen appliances, and in particular to a water system for an electric steamer, a control method thereof, and an electric steamer. The water system for an electric steamer provided by the present invention comprises a water level detector, a water outlet pipe, a bottom water pipe, a heating plate, and an emptying mechanism; each time water is supplied to the heating plate, water is first supplied to the heating plate through the water level detector via the water outlet pipe and the bottom water pipe, and after the water level detector detects that the water supply action is completed, the water in the water outlet pipe and the bottom water pipe is discharged outwardly through the emptying mechanism, water flow is generated in the water outlet pipe, driving gas to flow in the water outlet pipe, and then the gas remaining in the water outlet pipe is discharged, and then water is supplied to the water outlet pipe and the bottom water pipe through the water level detector, the inside of the water outlet pipe and the bottom water pipe is filled with water, and the pressure in the water outlet pipe and the bottom water pipe is reduced, thereby solving the problem of high pipeline pressure and water circuit non-conduction caused by air remaining in the water outlet pipe in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen appliances, and in particular to a water system for an electric steamer and a control method thereof, and the electric steamer. Background Art

[0002] An electric steamer is a kitchen appliance that converts water into high-temperature steam for steam cooking of food; a water inlet system is formed by connecting a water tank, a solenoid valve, a water level detector, a steam generator, and a water supply pipe to supply water to the heating plate of the electric steamer.

[0003] When the electric steamer starts working, the CPU of the electronic control system sends signal data, and the water stored in the water tank flows into the water level detector, and then flows into the steam generator at the bottom of the inner cavity through the water outlet pipe. The water level detector sensing probe constantly detects the water level height, and uses the water level in the water level detector to equal the water level in the steam generator to control the water volume in the steam generator, and the steam generator starts heating to generate high-temperature steam to cook food. After cooking is completed, the remaining water in the evaporator and pipelines is drained. However, the pipelines in the water system of the electric steamer are long and tortuous, and the water at the bottom of the heating plate cannot be drained, and some water will remain. The residual water at the bottom of the heating plate makes it impossible to empty the trapped air in the pipe, which will increase the pressure in the pipe, affect the conduction of the water circuit, and eventually lead to failure of water level balance, dry burning of the heating plate, and inability to work normally. Summary of the invention

[0004] (I) The technical problem to be solved by the present invention is that in the water circuit of the existing electric steamer, residual water exists at the bottom of the heating plate, which makes it impossible for the trapped air in the pipe to be emptied, increases the pressure in the pipe, affects the conduction of the water circuit, and finally causes the water level balance to fail, causing the heating plate to dry out and fail to work normally.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a water system for an electric steamer, comprising: a water level detector, a water outlet pipe, a bottom water pipe, a heating plate and an emptying mechanism;

[0007] The outlet pipe has a first end and a second end opposite to each other, and the bottom water pipe has a third end and a fourth end opposite to each other;

[0008] The water outlet of the water level detector is communicated with the first end of the water outlet pipe, the second end of the water outlet pipe is communicated with the third end of the bottom water pipe, and the fourth end of the bottom water pipe is communicated with the inner cavity of the heating plate;

[0009] The draining mechanism is in communication with the bottom water pipe and / or the water outlet pipe and is used for draining the fluid inside the bottom water pipe and the water outlet pipe.

[0010] Furthermore, the emptying mechanism includes a first drain pipe and a drain pump, one end of the first drain pipe is connected to the drain pump, and the other end of the first drain pipe is connected to the bottom water pipe and / or the water outlet pipe.

[0011] Furthermore, the first drainage pipe is connected to the second end of the water outlet pipe and the third end of the bottom water pipe respectively through a three-way joint.

[0012] Furthermore, the emptying mechanism includes a second drain pipe, and the height of the second drain pipe is lower than the height of the outlet pipe and the bottom water pipe;

[0013] One end of the second drain pipe is connected to the bottom water pipe and / or the water outlet pipe, and the other end is connected to atmospheric pressure.

[0014] Furthermore, the second drain pipe is provided with a switch valve.

[0015] Furthermore, the second drainage pipe is connected to the second end of the water outlet pipe and the third end of the bottom water pipe respectively through a three-way joint.

[0016] Furthermore, a water valve is provided on the water outlet pipe and / or the bottom water pipe.

[0017] In another aspect, an embodiment of the present invention provides an electric steamer, comprising a water tank, a water inlet solenoid valve, and any one of the above-mentioned water system for an electric steamer;

[0018] The water outlet of the water tank is communicated with the water inlet solenoid valve through a pipeline, and the water inlet solenoid valve is communicated with the water inlet of the water level detector through a pipeline.

[0019] Furthermore, the electric steamer also includes a control mechanism, and the control mechanism is electrically connected to the water inlet solenoid valve and the water level detector.

[0020] In another aspect, an embodiment of the present invention provides a method for controlling a water system of an electric steamer, comprising:

[0021] The water level detector supplies water to the heating plate through the outlet pipe and the bottom water pipe;

[0022] After the water level detector detects that the water supply action is completed, the draining system is controlled to drain the fluid in the bottom water pipe and the outlet pipe;

[0023] Water is then supplied to the heating plate through a water level detector.

[0024] Further, the emptying mechanism is a drainage pump; controlling the emptying system to empty the fluid in the bottom water pipe and the outlet pipe includes:

[0025] The drainage pump is controlled to work intermittently for multiple times, each time working for 0.5s and pausing for 1s, so that the water in the water outlet pipe and the bottom water pipe is led to the first drainage pipe, driving the gas in the water outlet pipe to flow, and the gas in the water outlet pipe is discharged to the first drainage pipe and the inner cavity of the heating plate.

[0026] The beneficial effects of the present invention are as follows: the water circuit system for an electric steamer provided by the present invention comprises a water level detector, a water outlet pipe, a bottom water pipe, a heating plate and an emptying mechanism; each time water starts to be supplied to the heating plate, water is first supplied to the heating plate via the water outlet pipe and the bottom water pipe through the water level detector, and after the water level detector detects that the water supply action is completed, the water in the water outlet pipe and the bottom water pipe is discharged outwardly through the emptying mechanism, water flow is generated in the water outlet pipe, driving the gas to flow in the water outlet pipe, thereby discharging the gas remaining in the water outlet pipe, and then water is supplied to the water outlet pipe and the bottom water pipe through the water level detector, the inside of the water outlet pipe and the bottom water pipe is filled with water, the pressure in the water outlet pipe and the bottom water pipe is reduced, and the problem of high pipeline pressure and water circuit non-conduction caused by air remaining in the water outlet pipe in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A side view of the water system for an electric steamer provided in Embodiment 1 of the present invention;

[0029] Figure 2 This is a bottom view of the water system for the electric steamer provided in Embodiment 1 of the present invention.

[0030] Icons: 1-water level detector; 2-water outlet pipe; 3-bottom water pipe; 4-heating plate; 5-drain pump; 6-first drain pipe; 7-three-way connector. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] like Figure 1 and Figure 2 As shown, this embodiment provides a water system for an electric steamer, comprising: a water level detector 1, a water outlet pipe 2, a bottom water pipe 3, a heating plate 4 and an emptying mechanism; the water outlet pipe 2 has a first end and a second end opposite to each other, and the bottom water pipe 3 has a third end and a fourth end opposite to each other; the water outlet of the water level detector 1 is connected to the first end of the water outlet pipe 2, the second end of the water outlet pipe 2 is connected to the third end of the bottom water pipe 3, and the fourth end of the bottom water pipe 3 is connected to the inner cavity of the heating plate 4; the emptying mechanism is connected to the bottom water pipe 3 and / or the water outlet pipe 2, and is used for emptying the fluid inside the bottom water pipe 3 and the water outlet pipe 2.

[0034] The water circuit system for an electric steamer provided by the present invention comprises a water level detector 1, a water outlet pipe 2, a bottom water pipe 3, a heating plate 4 and an emptying mechanism. When water is supplied to the heating plate 4 each time, water is first supplied to the heating plate 4 through the water level detector 1 via the water outlet pipe 2 and the bottom water pipe 3. After the water level detector 1 detects that the water supply action is completed, the water in the water outlet pipe and the bottom water pipe 3 is discharged outwardly through the emptying mechanism, water flow is generated in the water outlet pipe 2, driving the gas to flow in the water outlet pipe 2, and then the gas remaining in the water outlet pipe 2 is discharged. Then, water is supplied to the water outlet pipe 2 and the bottom water pipe 3 through the water level detector 1, the inside of the water outlet pipe 2 and the bottom water pipe 3 are filled with water, and the pressure in the water outlet pipe 2 and the bottom water pipe 3 is reduced, thereby solving the problem of high pipeline pressure and water circuit non-conduction caused by air remaining in the water outlet pipe 2 in the prior art.

[0035] The water supply of the water system of the electric steamer is carried out through the water level detector 1, specifically, the water level detector 1 is connected with the water outlet pipe 2, the water outlet pipe 2 is connected with the bottom water pipe 3, and the bottom water pipe 3 is connected with the inner cavity of the heating plate 4, wherein the induction probe of the water level detector 1 detects the water level height at all times, the water level in the water level detector 1 is equal to the water level height in the inner cavity of the heating plate 4, and the atmospheric pressure is used to keep the water level height of the water level detector 1 and the inner cavity of the heating plate 4 constant; after the electric steamer stops working, the water in the water outlet pipe 2 and the bottom water pipe 3 will be discharged, but because the pipes in the water system are long and tortuous, the water cannot be completely discharged , some water will still remain in the water outlet pipe 2 and the bottom water pipe 3. When the electric steamer uses the water level detector 1 to pass water to the inner cavity of the heating plate 4 through the water outlet pipe 2 and the bottom water pipe 3 next time, since there is residual water in the inner cavity of the heating plate 4 and the bottom water pipe 3, no gas residue will be formed between the water newly passed into the water outlet pipe 2 and the residual water. The residual gas will increase the pressure inside the water outlet pipe 2 and the bottom water pipe 3, affecting the conduction of the water path, and the liquid level height detected by the water level detector 1 meets the requirements of the heating plate 4, but in fact there is not enough water in the inner cavity of the heating plate 4, which eventually causes the heating plate 4 to dry-burn and fail to work.

[0036] In the present embodiment, when starting work, water is first passed into the water outlet pipe 2. After the water level detector 1 detects that the water supply is completed, the emptying mechanism is started to discharge the water in the water outlet pipe 2 and the bottom water pipe 3. Water flow is generated in the water outlet pipe 2, which drives the gas to flow in the water outlet pipe 2, thereby discharging the residual gas in the water outlet pipe 2. Then, water is supplied to the water outlet pipe 2 and the bottom water pipe 3 through the water level detector 1. The inside of the water outlet pipe 2 and the bottom water pipe 3 are filled with water, thereby reducing the pressure in the water outlet pipe 2 and the bottom water pipe 3. At this time, the water path from the water level detector 1 to the heating plate 4 is connected, which solves the problem of water level balance failure and prevents the heating plate 4 from drying out.

[0037] like Figure 2 In the embodiment shown, the emptying mechanism includes a first drain pipe 6 and a drain pump 5, one end of the first drain pipe 6 is connected to the drain pump 5, and the other end is connected to the water outlet pipe 2; since the bottom water pipe 3 and the first drain pipe 6 are connected, the water inside the water outlet pipe 2 and the bottom water pipe 3 is guided to the first drain pipe 6 by the drain pump 5 and discharged through the first drain pipe 6. While the first drain pipe 6 drains water, water flow is generated in the water outlet pipe 2, driving the gas to be discharged into the inner cavity of the heating plate 4, and the gas is discharged from the water channel therefrom. The remaining space will be filled with water in the water level detector 1. At this point, the air in the water channel is basically discharged, and the pressure in the water channel is reduced to a level that basically cannot affect the water level balance of this water channel system.

[0038] Optionally, in this embodiment, the first drain pipe 6 may be connected to the bottom water pipe 3. Since the outlet pipe 2 and the bottom water pipe 3 are connected, the purpose of discharging the gas and water in the outlet pipe 2 and the bottom water pipe 3 can be achieved through the drainage pump 5 and the first drain pipe 6.

[0039] like Figure 2 As shown, in this embodiment, the first drain pipe 6 is connected with the bottom water pipe 3 and the outlet pipe 2 respectively. Specifically, the first drain pipe 6 is connected with the second end of the outlet pipe 2 and the third end of the bottom water pipe 3 respectively through a three-way joint 7; the conduction at the junction of the drainage waterway and the inlet waterway can help to dredge the inlet waterway and reduce the pressure at the junction of the inlet waterway and the drainage waterway.

[0040] Of course, in this embodiment, when the first drain pipe 6 is connected to the outlet pipe 2 and the bottom water pipe 3 respectively, two outlet pipes 2 can also be set, and then the drainage pump 5 is connected to the outlet pipe 2 and the bottom water pipe 3 respectively through the two first drain pipes 6.

[0041] The drainage pump 5 and the first drainage pipe 6 of this embodiment can not only assist the water system in discharging gas and thereby conduct the water path, but can also drain the electric steamer. That is, when the electric steamer is finished working, the drainage pump 5 is started to guide the water in the water outlet pipe 2, the bottom water pipe 3 and the inner cavity of the heating plate 4 to the first drainage pipe for discharge.

[0042] Preferably, a water valve is provided on the water outlet pipe 2, and the water valve can control the conduction and closing of the water outlet pipe 2, so that when the electric steamer starts working, if the drain pump 5 is not started, the residual gas in the water outlet pipe 2 can also be discharged through the water valve; specifically, when the water level detector 1 passes water into the water outlet pipe 2, the water valve on the water level detector 1 is closed to increase the water pressure, and when the increased water pressure is greater than the pressure increased by the residual air in the water outlet pipe 2, the water valve is opened, and the water in the water outlet pipe 2 can discharge the air through the heating plate 4, thereby improving the conduction capacity of the water path; wherein the water valve can be a solenoid valve.

[0043] Embodiment 2

[0044] The technical solutions of this embodiment are substantially the same as those of the first embodiment, with the main difference being that the emptying mechanism described in this embodiment includes a second drain pipe, the position height of the second drain pipe being lower than the position heights of the outlet pipe 2 and the bottom water pipe 3; one end of the second drain pipe is connected to the bottom outlet pipe 2, and the other end is connected to atmospheric pressure.

[0045] In this embodiment, the emptying mechanism is a second drain pipe, the height of the second drain pipe is lower than the height of the water outlet pipe 2 and the bottom water pipe 3, and the end of the second drain pipe connected to the atmospheric pressure is first sealed when not in use; when the electric steamer is working, water is first passed into the water outlet pipe 2, and after the water level detector 1 detects that the water supply is completed, the second drain pipe is started and opened to connect the second drain pipe with the external atmospheric pressure. Since the position of the second drain pipe is lower than the water outlet pipe 2 and the bottom water pipe 3, the water in the water outlet pipe 2 and the bottom water pipe 3 will flow to the second drain pipe under the action of its own gravity, and water flow is generated in the water outlet pipe 2, driving the gas to flow in the water outlet pipe 2, and then the gas remaining in the water outlet pipe 2 is discharged, and then water is supplied to the water outlet pipe 2 and the bottom water pipe 3 through the water level detector 1, and the inside of the water outlet pipe 2 and the bottom water pipe 3 is filled with water, reducing the pressure in the water outlet pipe 2 and the bottom water pipe 3; at this time, the water path from the water level detector 1 to the heating plate 4 is connected, which solves the problem of water level balance failure and prevents the heating plate 4 from drying out.

[0046] It should be noted that in this embodiment, the second drain pipe can also be connected to the bottom water pipe 3. Since the outlet pipe 2 and the bottom water pipe 3 are connected, the purpose of discharging gas and water in the outlet pipe 2 and the bottom water pipe 3 through the second drain pipe can be achieved.

[0047] Preferably, in this embodiment, the second drain pipe is connected with the bottom water pipe 3 and the outlet pipe 2 respectively, specifically, the second drain pipe is connected with the second end of the outlet pipe 2 and the third end of the bottom water pipe 3 respectively through a three-way joint 7; the conduction at the junction of the drainage waterway and the inlet waterway can help to dredge the inlet waterway and reduce the pressure at the junction of the inlet waterway and the drainage waterway.

[0048] Furthermore, a switch valve is provided on the second drain pipe, and the conduction and closing of the second drain pipe can be controlled by the switch valve, so as to control the exhaust of gas in the outlet pipe 2; wherein the switch valve can be a solenoid valve, which is connected to the control mechanism and can realize automatic control.

[0049] Embodiment 3

[0050] This embodiment provides an electric steamer, comprising a water tank, a water inlet solenoid valve and the water system for the electric steamer described in the above-mentioned embodiment one or embodiment two; the water outlet of the water tank is connected to the water inlet solenoid valve through a pipeline, and the water inlet solenoid valve is connected to the water inlet of the water level detector 1 through a pipeline.

[0051] The electric steamer provided in the present embodiment adopts an emptying mechanism in its water system; each time water is supplied to the heating plate 4, water is first supplied to the heating plate 4 through the water level detector 1 via the water outlet pipe 2 and the bottom water pipe 3; after the water level detector 1 detects that the water supply action is completed, the water in the water outlet pipe 2 and the bottom water pipe 3 is discharged outwardly through the emptying mechanism, water flow is generated in the water outlet pipe 2, driving the gas to flow in the water outlet pipe 2, thereby discharging the gas remaining in the water outlet pipe 2; then water is supplied to the water outlet pipe 2 and the bottom water pipe 3 through the water level detector 1, the water outlet pipe 2 and the bottom water pipe 3 are filled with water, the pressure in the water outlet pipe 2 and the bottom water pipe 3 is reduced, and the problem of dry burning is avoided.

[0052] Optionally, the electric steamer also includes a control mechanism, which is electrically connected to the water inlet solenoid valve and the water level detector 1; when water does not contact the probe in the water level detector 1, it is fed back to the electronic control system, and the electronic control system receives a water-free signal, then opens the water inlet solenoid valve, and the water in the water tank enters the water level detector 1 through the water inlet solenoid valve, and then enters the inner cavity of the heating plate 4 through the water outlet pipe 2 and the bottom water pipe 3; conversely, when the water contacts the probe in the water level detector 1, the feedback signal is given to the control mechanism that the water is filled to the set water level, and the control mechanism receives a water presence signal, then closes the water inlet solenoid valve to stop the water supply, wherein the control mechanism can also control the operation of the switch valve and the drain pump 5.

[0053] Embodiment 4

[0054] The present embodiment provides a control method for a water system of an electric steamer, comprising: a water level detector 1 supplies water to a heating plate 4 through a water outlet pipe 2 and a bottom water pipe 3; after the water level detector 1 detects that the water supply action is completed, the emptying system is controlled to empty the fluid in the bottom water pipe 3 and the water outlet pipe; and then water is supplied to the heating plate 4 through the water level detector 1.

[0055] Preferably, the emptying mechanism is a drain pump 5; controlling the emptying system to empty the fluid in the bottom water pipe 3 and the outlet pipe includes: controlling the drain pump 5 to work intermittently for multiple times, each time working for 0.5s, and pausing for 1s, so that the water in the outlet pipe 2 and the bottom water pipe 3 is led to the first drain pipe 6, driving the gas flow in the outlet pipe 2, and the gas in the outlet pipe 2 is discharged to the first drain pipe 6 and the inner cavity of the heating plate 4; at this point, the air in the water circuit is basically discharged, and the pressure in the water circuit is reduced to a level that basically cannot affect the water level balance of this water circuit system.

[0056] Let's talk about the working principle of the electric steamer water system in detail.

[0057] Each time water starts to be supplied to the heating pan 4, the control mechanism first controls the water inlet solenoid valve to open, the water outlet of the water tank is connected to the water inlet solenoid valve through a pipeline, the water inlet solenoid valve is connected to the water inlet of the water level detector 1 through a pipeline, and then the water enters the inner cavity of the heating pan 4 through the water outlet pipe 2 and the bottom water pipe 3;

[0058] When the water level detector 1 detects that the water supply action is completed, the control mechanism controls the water inlet solenoid valve to close, and then the control mechanism controls the drainage pump 5 to open, and controls the drainage pump 5 to work intermittently for multiple times, each time working for 0.5s, and pausing for 1s, so that the water in the water outlet pipe 2 and the bottom water pipe 3 is led to the first drainage pipe 6, driving the gas in the water outlet pipe 2 to flow, and the gas in the water outlet pipe 2 is discharged to the drainage pipe and the inner cavity of the heating plate 4; then water is supplied to the water outlet pipe 2 and the bottom water pipe 3 through the water level detector 1, and the inside of the water outlet pipe 2 and the bottom water pipe 3 is filled with water, reducing the pressure in the water outlet pipe 2 and the bottom water pipe 3.

[0059] In summary, the water system for an electric steamer provided by the present invention comprises a water level detector, a water outlet pipe, a bottom water pipe, a heating plate and an emptying mechanism; each time water is supplied to the heating plate, water is first supplied to the heating plate via the water outlet pipe and the bottom water pipe through the water level detector, and after the water level detector detects that the water supply action is completed, the water in the water outlet pipe and the bottom water pipe is discharged outwardly through the emptying mechanism, water flow is generated in the water outlet pipe, driving the gas to flow in the water outlet pipe, thereby discharging the gas remaining in the water outlet pipe, and then water is supplied to the water outlet pipe and the bottom water pipe through the water level detector, the inside of the water outlet pipe and the bottom water pipe is filled with water, reducing the pressure in the water outlet pipe and the bottom water pipe, thereby solving the problem of high pipeline pressure and water circuit non-conduction caused by air remaining in the water outlet pipe in the prior art.

[0060] In the description of the present invention, it should be noted that the terms "upper", "lower", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the inside of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water system for an electric steamer, the electric steamer comprising a control mechanism, characterized in that: The water system comprises: a water level detector (1), a water outlet pipe (2), a bottom water pipe (3), a heating plate (4) and an emptying mechanism; The water outlet pipe (2) has a first end and a second end opposite to each other, and the bottom water pipe (3) has a third end and a fourth end opposite to each other; The water outlet of the water level detector (1) is in communication with the first end of the water outlet pipe (2), the second end of the water outlet pipe (2) is in communication with the third end of the bottom water pipe (3), and the fourth end of the bottom water pipe (3) is in communication with the inner cavity of the heating plate (4); The draining mechanism is in communication with the bottom water pipe (3) and / or the water outlet pipe (2) and is used for draining the fluid inside the bottom water pipe (3) and the water outlet pipe (2); The control mechanism receives a water level signal detected by the water level detector (1); when the control mechanism detects that there is no water in the water level detector (1), the control mechanism controls the water level detector (1) to supply water to the heating plate (4) through the water outlet pipe (2) and the bottom water pipe (3); When the control mechanism detects that the water level detector (1) has been filled to a set water level, the control mechanism controls the draining mechanism to drain the water in the water outlet pipe (2) and the bottom water pipe (2) outwards; After the water in the water outlet pipe (2) and the bottom water pipe (3) is drained, the control mechanism controls the water level detector (1) to supply water to the water outlet pipe (2) and the bottom water pipe (3), so that the inside of the water outlet pipe (2) and the bottom water pipe (3) are filled with water.

2. The water system for an electric steamer according to claim 1, characterized in that: The emptying mechanism comprises a first drain pipe (6) and a drain pump (5); one end of the first drain pipe (6) is connected to the drain pump (5), and the other end is connected to the bottom water pipe (3) and / or the water outlet pipe (2).

3. The water system for an electric steamer according to claim 2, characterized in that: The first drainage pipe (6) is respectively connected to the second end of the water outlet pipe (2) and the third end of the bottom water pipe (3) through a three-way joint (7).

4. The water system for an electric steamer according to claim 1, characterized in that: The emptying mechanism comprises a second drain pipe, the height of the second drain pipe being lower than the height of the outlet pipe (2) and the bottom water pipe (3); One end of the second drainage pipe is connected to the bottom water pipe (3) and / or the water outlet pipe (2), and the other end is connected to atmospheric pressure.

5. The water system for an electric steamer according to claim 4, characterized in that: The second drain pipe is provided with a switch valve.

6. The water system for an electric steamer according to claim 4, characterized in that: The second drainage pipe is respectively connected to the second end of the water outlet pipe (2) and the third end of the bottom water pipe (3) through a three-way joint (7).

7. The water system for an electric steamer according to claim 1, characterized in that: The water outlet pipe and / or the bottom water pipe (3) is provided with a water valve.

8. An electric steamer, characterized in that: It comprises a water tank, a water inlet solenoid valve and a water system for an electric steamer as claimed in any one of claims 1 to 7; The water outlet of the water tank is connected to the water inlet solenoid valve through a pipeline, and the water inlet solenoid valve is connected to the water inlet of the water level detector (1) through a pipeline.

9. The electric steamer according to claim 8, characterized in that: The electric steamer also includes a control mechanism, which is electrically connected to the water inlet solenoid valve and the water level detector (1).

10. A method for controlling a water system of an electric steamer according to any one of claims 2 to 7, comprising: The water level detector (1) supplies water to the heating plate (4) through the water outlet pipe (2) and the bottom water pipe (3); After the water level detector (1) detects that the water supply action is completed, it controls the drainage pump (5) to start, and drains the fluid in the bottom water pipe (3) and the water outlet pipe through the first drainage pipe (6); Water is supplied to the heating pan (4) via a water level detector (1).

11. The control method of the waterway system according to claim 10, characterized in that: The emptying mechanism is a drainage pump (5); controlling the emptying system to empty the fluid in the bottom water pipe (3) and the outlet pipe comprises: The drainage pump (5) is controlled to work intermittently for multiple times, each time working for 0.5 seconds and pausing for 1 second, so that the water in the water outlet pipe (2) and the bottom water pipe (3) is led to the first drainage pipe (6), driving the gas in the water outlet pipe (2) to flow, and the gas in the water outlet pipe (2) is discharged to the first drainage pipe (6) and the inner cavity of the heating plate (4).

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