Liquid heater with anti-dry-burning protection device

Abstract

The utility model discloses a liquid heater with an anti-dry-burning protection device, which comprises a base and a container, a shell is arranged at the bottom of the container, the anti-dry-burning protection device is arranged inside the bottom wall of the shell and comprises a microswitch, a spring and a silicon rubber case, the microswitch is fixedly connected with the shell, and the spring is fixedly connected with the silicon rubber case. The spring is arranged between the microswitch and the silica gel sleeve, one end of the silica gel sleeve extends to the outer side of the shell, and an ejector rod in contact with the microswitch is arranged in the silica gel sleeve. The anti-dry-burning protection device can protect the heater to be electrified to work only when enough liquid exists in the heater, so that the working safety of the whole machine is ensured, and the condition of dry burning is avoided.

Description

Technical Field

[0001] The utility model relates to the field of electrical appliances, in particular to a liquid heater provided with an anti-dry burning protection device. Background Art

[0002] A liquid heater is a modern small household appliance that can quickly boil water. Its main function is to heat liquid. If there is no liquid in the container of an existing liquid heater, the heater will also heat the container and cause dry burning. First, dry burning will burn the internal components of the electric kettle, such as the thermostat, circuit, etc. If it is dry burned for a long time, it may even cause a fire. Utility Model Content

[0003] The utility model solves the problem that the existing liquid heater causes dry burning of the container.

[0004] The technical solution adopted by the utility model is: a liquid heater provided with an anti-dry-burning protection device, comprising a base and a container, a shell is provided at the bottom of the container, an anti-dry-burning protection device is provided inside the bottom wall of the shell, the anti-dry-burning protection device comprises a micro switch, a spring and a silicone sleeve, the micro switch is fixedly connected to the shell, the spring is provided between the micro switch and the silicone sleeve, one end of the silicone sleeve extends to the outside of the shell, and a top rod in contact with the micro switch is provided in the silicone sleeve.

[0005] Furthermore, the bottom wall of the shell is provided with a mounting portion for an anti-dry burning protection device.

[0006] Furthermore, the mounting portion is formed by surrounding side walls, a mounting column is arranged in the middle of the side walls of the mounting portion, a mounting plate is arranged on the edge of the micro switch, and the mounting plate is screwed to the mounting column by screws.

[0007] Furthermore, a limiting ring is provided at the edge of the silicone sleeve, and the outer diameter of the limiting ring is larger than the hole diameter through which the silicone sleeve passes through the shell.

[0008] Furthermore, a mounting groove is provided in the silicone sleeve, the push rod is arranged in the mounting groove, and the spring is sleeved on the outer side of the push rod.

[0009] Compared with the prior art, the utility model has the beneficial effect that: the anti-dry burning protection device can protect the heater from being powered on only when there is enough liquid in the heater, thereby ensuring the safe operation of the whole machine and preventing the occurrence of dry burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the front view of the utility model;

[0011] Figure 2 It is an exploded view of the utility model;

[0012] Figure 3This is a schematic diagram of the anti-dry burning protection device and the housing installation structure of the utility model;

[0013] Figure 4 It is a cross-sectional view of the anti-dry burning protection device and the housing of the utility model;

[0014] Figure 5 This is a schematic diagram of the structure of the silicone sleeve of the utility model.

[0015] Figure numerals: base 10; container 20; shell 30; anti-dry burning protection device 40; micro switch 41; spring 42; silicone sleeve 43; push rod 44; mounting portion 50; mounting column 51; limit ring 46; mounting plate 45. DETAILED DESCRIPTION

[0016] like Figures 1 to 5 A liquid heater provided with an anti-dry-burning protection device comprises a base 10 and a container 20, wherein a shell 30 is provided at the bottom of the container 20, and an anti-dry-burning protection device 40 is provided inside the bottom wall of the shell 30, wherein the anti-dry-burning protection device 40 comprises a micro switch 41, a spring 42 and a silicone sleeve 43, wherein the micro switch 41 is fixedly connected to the shell 30, the spring 42 is provided between the micro switch 41 and the silicone sleeve 43, one end of the silicone sleeve 43 extends to the outside of the shell 30, and a top rod 44 in contact with the contact of the micro switch 41 is provided in the silicone sleeve 43.

[0017] When in use, the container 20 is arranged on the top of the base 10, and the silicone sleeve 43 on the outer side of the bottom of the shell 30 abuts against the upper surface of the base 10. The spring 42 is preset to bear the weight coefficient of the liquid in the container. If the weight of the liquid in the container 20 does not reach the weight borne by the spring 42 coefficient, the spring 42 cannot shrink and the push rod 44 fails to push the contact of the micro switch 41, that is, the entire liquid heater is not connected to the power supply and cannot heat. When the liquid injected into the container 20 reaches the preset weight, the spring 42 is compressed by pressure and the push rod 44 of the silicone sleeve 43 will contact the contact of the micro switch 41, so that the liquid heater contacts the power supply to start heating the liquid. The anti-dry-burning protection device 40 can protect the heater from being powered on only when there is enough liquid in it, thereby ensuring the safety of the entire machine and preventing dry-burning.

[0018] The bottom wall of the shell 30 is provided with a mounting portion 50 of the anti-dry-burning protection device 40, and the mounting portion 50 is formed by being surrounded by side walls. A mounting column 51 is provided in the middle of the side wall of the mounting portion 50, and a mounting plate 45 is provided on the edge of the micro switch 41. The mounting plate 45 is screwed to the mounting column 51 by screws, so that the micro switch 41 is fixedly mounted to the shell 30.

[0019] A limiting ring 46 is provided on the edge of the silicone sleeve 43, and the outer diameter of the limiting ring 46 is larger than the aperture of the silicone sleeve 43 passing through the shell 30. When in use, one end of the silicone sleeve 43 passes through the bottom of the shell 30 and contacts the upper surface of the base 10. The limiting ring 46 of the silicone sleeve 43 can prevent the silicone sleeve 43 from falling off from the shell 30.

[0020] During specific implementation, a mounting groove is provided in the silicone sleeve 43 , the push rod 44 is provided in the mounting groove, the spring 42 is sleeved on the outside of the push rod 44 , one end of the spring 42 abuts against the silicone sleeve 43 and the other end abuts against the micro switch 41 .

Claims

1. A liquid heater provided with an anti-dry burning protection device, Features: The invention comprises a base (10) and a container (20), wherein a shell (30) is provided at the bottom of the container (20), an anti-dry-burning protection device (40) is provided inside the bottom wall of the shell (30), and the anti-dry-burning protection device (40) comprises a micro switch (41), a spring (42) and a silicone sleeve (43), wherein the micro switch (41) is fixedly connected to the shell (30), the spring (42) is provided between the micro switch (41) and the silicone sleeve (43), one end of the silicone sleeve (43) extends to the outside of the shell (30), and a top rod (44) in contact with the micro switch (41) is provided in the silicone sleeve (43); the bottom wall of the shell (30) is provided A mounting portion (50) of an anti-dry-burning protection device (40) is provided; the mounting portion (50) is formed by being surrounded by a side wall, a mounting column (51) is provided in the middle of the side wall of the mounting portion (50), a mounting plate (45) is provided at the edge of the micro switch (41), and the mounting plate (45) is screwed to the mounting column (51) by screws; a limiting ring (46) is provided at the edge of the silicone sleeve (43), and the outer diameter of the limiting ring (46) is larger than the hole diameter of the silicone sleeve (43) passing through the shell (30); a mounting groove is provided in the silicone sleeve (43), the push rod (44) is provided in the mounting groove, and the spring (42) is sleeved on the outer side of the push rod (44).

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