Stepping heater structure

Abstract

The utility model relates to a stepping heater structure which comprises a heating tank. The heating tank comprises a tank body and an electric heating device arranged at the lower part of the tank body; a water outlet pipe and a temperature probe pipe are arranged at the lower part of the tank body; a water inlet pipe capable of conveying water to the inner cavity of the tank body is arranged at the top end of the tank body; the water inlet pipe comprises an in-tank section located in an inner cavity of the tank body, the bottom end of the in-tank section and the electric heating device are partially overlapped in the height direction, and the temperature probe pipe is completely higher than the electric heating device. An exhaust pipe communicated with the inner cavity of the tank body is arranged at the upper part of the tank body. The stepping water adding and heating device has the advantages that stepping water adding and heating can be achieved; and water can be prevented from flowing back from the water inlet pipe due to pressure rise in the tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of drinking water equipment, in particular to a step-type heater structure. Background Art

[0002] The heating tank of traditional drinking water equipment is to add water to a higher water level in the tank and then turn on the electric heater to heat it; that is, the water in the heating tank is heated in one step; resulting in a long time from the start of heating to the boiling of water, and users may need to wait a long time before they can use the boiled water.

[0003] In addition, there is room for further improvement in the reliability of the heating tanks of traditional drinking water equipment. Utility Model Content

[0004] One purpose of the present invention is to solve or alleviate the above technical problems.

[0005] The means adopted by the utility model is a step-by-step heater structure, which includes a heating tank; the heating tank includes a tank body and an electric heating device arranged at the lower part of the tank body, and the lower part of the tank body is provided with a water outlet pipe and a temperature probe tube; the top of the tank body is provided with a water inlet pipe capable of conveying water to the inner cavity of the tank body; the water inlet pipe includes an inner tank section located in the inner cavity of the tank body, and the bottom end of the inner tank section has an overlapping part with the electric heating device in the height direction, and the temperature probe tube is completely higher than the electric heating device; the upper part of the tank body is provided with an exhaust pipe connected to the inner cavity of the tank body.

[0006] The effects achieved by the utility model are that water can be added and heated step by step, and water can be prevented from flowing back from the water inlet pipe due to pressure increase in the tank.

[0007] According to a further technical solution, an anti-siphon hole is provided in the inner section of the tank, and the anti-siphon hole is higher than the exhaust pipe.

[0008] To prevent water in the tank from flowing back from the water inlet pipe and overflowing from the exhaust pipe.

[0009] According to a further technical solution, the electric heating device is an electric heating tube having two power connection ends, the two power connection ends are vertically arranged and exposed from the tank body, and the bottom end of the tank inner section is located between the two power connection ends in the height direction.

[0010] A further technical solution also includes a liquid level detection electrode, which includes a high water level electrode and a low water level electrode higher than the temperature probe tube.

[0011] According to a further technical solution, the liquid level detection electrode includes an anti-overflow electrode; the anti-overflow electrode is lower than the exhaust pipe and higher than the high water level electrode.

[0012] It can further ensure that the water in the tank will not overflow from the exhaust pipe, which is safer.

[0013] According to a further technical solution, the temperature probe tube includes a probe tube body and a temperature sensor connected to a signal line, and the temperature sensor is arranged in the probe tube body and located in the tank body.

[0014] A further technical solution is that the tank body includes an inner layer of the tank body, which is provided with a probe tube hole edge; the temperature probe tube also includes an elastic seal with an outer extension edge, the elastic seal is embedded in the probe tube body, the signal line of the temperature sensor passes through the elastic seal, and the outer extension edge is abutted against the probe tube hole edge and the probe tube body.

[0015] It is convenient to install the temperature probe tube and can ensure the sealing between the temperature probe tube and the inner layer of the tank.

[0016] In a further technical solution, the inner layer of the tank body is made of metal, and the tank body further includes a heat-insulating layer surrounding the inner layer 111 of the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the stepping heater structure of an embodiment of the present utility model.

[0018] Figure 2 It is a schematic top view of the stepping heater structure of an embodiment of the present utility model.

[0019] Figure 3 2 is a schematic cross-sectional view of the step-type heater structure of an embodiment of the present invention; the cross-section is a plane passing through the axis of the anti-overflow electrode 25 and the axis of the high water level electrode 21.

[0020] Figure 4 1 is a side view schematic diagram of the step-type heater structure of an embodiment of the present utility model; in this figure, a part of the tank body 11 is cut away.

[0021] Figure 5 yes Figure 4 Details of a schematic diagram of DTL1.

[0022] Figure 6 yes Figure 3 Details of 2 schematic diagrams of DTL2.

[0023] Designate the drawings in the specification Figure 4 The following is an abstract.

[0024] Detail 1 DTL1; Detail 2 DTL2; heating tank 1; tank body 11; tank inner layer 111; probe tube hole edge 112; insulation layer 119; electric heating device 12; power terminal 121; insulating member 122; water inlet pipe 13; conveying device 131; tank inner section 132; anti-siphon hole 133; water outlet pipe 14; water outlet pipe valve 141; exhaust pipe 15; sewage pipe 18; fixing bracket 19; liquid level detection electrode 2; high water level electrode 21; low water level electrode 22; anti-overflow electrode 25; temperature probe tube 3; temperature sensor 31; signal line 319; probe tube body 32; elastic sealing member 33; outer extension edge 331. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention will be described below with reference to the accompanying drawings.

[0026] As a specific embodiment, the step-by-step heater structure of the embodiment of the present invention includes a heating tank 1 .

[0027] The heating tank 1 comprises a tank body 11 and an electric heating device 12 mounted at the bottom of the tank body 11. The bottom of the tank body 11 is provided with a water outlet pipe 14 and a temperature probe tube 3. Both lower portions are defined by a plane located halfway up the height of the tank body 11's interior. As is conventional, the water outlet pipe 14 is equipped with an outlet valve 141. A mounting bracket 19 is fixed to the top of the tank body 11, and a drain pipe 18 is located at the bottom of the tank body 11.

[0028] A water inlet pipe 13 is provided at the top of the tank body 11 for delivering water to the inner cavity of the tank body 11. Typically, a delivery device 131 such as a water pump is provided on the water inlet pipe 13. The delivery device 131 allows water to flow through the water inlet pipe 13 and deliver water to the tank body 11. As can be easily understood, the water delivered to the tank body 11 through the water inlet pipe 13 is generally at a relatively low temperature.

[0029] The water inlet pipe 13 includes an in-tank section 132 located within the interior of the tank body 11. The bottom end of the in-tank section 132 overlaps vertically with the electric heater 12, and the temperature probe tube 3 is completely higher than the electric heater 12. For example, the electric heater 12 is a heating pipe and has two electrical terminals 121, which are vertically arranged and exposed from the tank body 11. The bottom end of the in-tank section 132 is located vertically between the two terminals 121, resulting in a vertical overlap between the bottom end of the in-tank section 132 and the electric heater 12. Typically, the central portion of the electric heater 12 is spirally shaped to increase its contact surface with the water.

[0030] The upper portion of the tank body 11 is provided with an exhaust pipe 15 that communicates with the interior of the tank body 11. An anti-siphon hole 133 is provided in the inner section 132, which is higher than the exhaust pipe 15. If the water source connected to the other end of the water inlet pipe 13 is lower or the internal pressure of the tank body 11 is too low, the water in the tank body 11 may be drawn out of the water inlet pipe 13 due to siphoning. Therefore, the anti-siphon hole 133 is provided in the inner section 132, which is higher than the exhaust pipe 15, to prevent the water in the tank body 11 from flowing back through the water inlet pipe 13 and overflowing out of the exhaust pipe 15.

[0031] The working principle is as follows: the water inlet pipe 13 transports water into the tank body 11, and the water level in the tank body 11 gradually rises until it completely or partially exceeds the electric heating device 12. The electric heating device 12 is then turned on to heat the water to boiling water (the temperature probe tube 3 detects that the temperature has risen to about 100 degrees Celsius and lasts for a period of time). After that, the water inlet pipe 13 transports a certain volume of water or a certain time into the tank body 11. At this time, the water temperature in the tank body 11 will drop to below the boiling water temperature. Repeating the above process can achieve step-by-step water addition and heating; during the step-by-step water addition and heating process, the user can wait for a short time before opening the water outlet valve 141 and using boiled water. It is easy to understand that the electric heating device 12, the temperature probe tube 3, and the water outlet valve 141 are all electrically connected to the control panel to achieve the above-mentioned automatic control of step-by-step water addition and heating.

[0032] The steam generated during the step-by-step water addition and heating process is condensed and discharged from the exhaust pipe 15 (a condenser of the prior art is provided in the exhaust pipe 15, but this will reduce its exhaust performance), which can prevent the pressure in the tank body 11 from increasing and causing water to flow back from the water inlet pipe 13.

[0033] As one specific embodiment, the system further includes liquid level detection electrodes 2, which include a high water level electrode 21 and a low water level electrode 22 located above the temperature probe tube 3. As will be readily understood, the liquid level detection electrodes 2 are electrically connected to a control panel, etc., to achieve their function. The overflow prevention electrode 25 serves as a signal source for activating the electric heating device 12, while the high water level electrode 21 serves as a signal source for stopping water flow through the water inlet pipe 13.

[0034] As one specific embodiment, the liquid level detection electrode 2 includes an anti-overflow electrode 25; the anti-overflow electrode 25 is lower than the exhaust pipe 15 and higher than the high water level electrode 21. When the water level reaches the exhaust pipe 15, the water inlet pipe 13 can no longer supply water to the tank body 11, further ensuring that the water in the tank body 11 does not overflow from the exhaust pipe 15, which is more safe.

[0035] As one of the specific embodiments, the temperature probe tube 3 includes a probe tube body 32 and a temperature sensor 31 connected to a signal line 319. The probe tube body 32 is usually made of metal to improve thermal conductivity. The temperature sensor 31 is arranged in the probe tube body 32 and is located in the tank body 11.

[0036] As one specific embodiment, the tank body 11 includes an inner tank layer 111, for example, made of metal. The tank body 11 also includes an insulation layer 119 surrounding the inner tank layer 111. The inner tank layer 111 is provided with a probe tube hole rim 112. As will be readily understood, the interior of the probe tube hole rim 112 is a hole extending through the inner tank layer 111. A probe tube body 32 is embedded within the probe tube hole rim 112. The temperature probe tube 3 also includes an elastic seal 33 having an outer extension rim 331, made of silicone or other elastic material. The elastic seal 33 is embedded in the probe tube body 32, and the signal line 319 of the temperature sensor 31 passes through the elastic seal 33. The outer extension rim 331 abuts against the probe tube hole rim 112 and the probe tube body 32. This facilitates installation of the temperature probe tube 3 while ensuring a seal between the temperature probe tube 3 and the inner tank layer 111.

[0037] The terms "first", "second", etc., used in this invention do not indicate any order, quantity or importance, but are only used to distinguish.

[0038] As used in this invention, the terms "a", "an", etc. do not indicate a limitation of quantity, but rather indicate the presence of at least one of the referenced item.

[0039] For example, terms indicating orientation or position used in this utility model, such as top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, below, etc., are intended to reflect relative positions rather than absolute positions.

[0040] As used in this disclosure, terms such as "substantially," "entirely," "approximately," and "closely" are qualifiers intended to indicate that a characteristic exists but a certain degree of deviation is permitted. The amount of such deviation may vary depending on the specific context; for example, the specific context of dimensional deviation may include, but is not limited to, standards related to dimensional tolerances.

Claims

1. A step-type heater structure, comprising a heating tank (1); the heating tank (1) comprises a tank body (11) and an electric heating device (12) arranged at the lower portion of the tank body (11); a water outlet pipe (14) and a temperature probe pipe (3) are arranged at the lower portion of the tank body (11); Its characteristics are: The top of the tank body (11) is provided with a water inlet pipe (13) capable of conveying water to the inner cavity of the tank body (11); the water inlet pipe (13) includes an inner tank section (132) located in the inner cavity of the tank body (11); the bottom end of the inner tank section (132) overlaps with the electric heating device (12) in the height direction, and the temperature probe tube (3) is completely higher than the electric heating device (12); and the upper part of the tank body (11) is provided with an exhaust pipe (15) communicating with the inner cavity of the tank body (11).

2. The step heater structure according to claim 1, wherein: The inner section (132) of the tank is provided with an anti-siphon hole (133), and the anti-siphon hole (133) is higher than the exhaust pipe (15).

3. The step heater structure according to claim 1, wherein: The electric heating device (12) is an electric heating pipe and has two power connection ends (121). The two power connection ends (121) are vertically arranged and exposed from the tank body (11). The bottom end of the tank inner section (132) is located between the two power connection ends (121) in the height direction.

4. The step heater structure according to claim 1, wherein: The invention also comprises a liquid level detection electrode (2), which comprises a high water level electrode (21) and a low water level electrode (22) higher than the temperature probe tube (3).

5. The step heater structure according to claim 4, wherein: The liquid level detection electrode (2) comprises an anti-overflow electrode (25); the anti-overflow electrode (25) is lower than the exhaust pipe (15) and higher than the high water level electrode (21).

6. The step heater structure according to claim 1, wherein: The temperature probe tube (3) comprises a probe tube body (32) and a temperature sensor (31) connected to a signal line (319); the temperature sensor (31) is arranged in the probe tube body (32) and is located in the tank body (11).

7. The step heater structure according to claim 6, wherein: The tank body (11) includes a tank inner layer (111), and the tank inner layer (111) is provided with a probe tube hole edge (112); the temperature probe tube (3) also includes an elastic sealing member (33) provided with an outer extension edge (331), the elastic sealing member (33) is embedded in the probe tube body (32), a signal line (319) of the temperature sensor (31) passes through the elastic sealing member (33), and the outer extension edge (331) and the probe tube hole edge (112) are in contact with the probe tube body (32).

8. The step heater structure according to claim 7, wherein: The inner layer (111) of the tank body is made of metal, and the tank body (11) further comprises a heat-insulating layer (119) surrounding the inner layer (111) of the tank body.

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