Heating body and household appliance

Abstract

The utility model discloses a heating body, which comprises a shell (1) and a heating pipe (2) arranged in the shell (1), and is characterized in that a heat conduction piece (3) arranged along the axial direction of the heating pipe (2) is arranged in the heating pipe (2), the peripheral wall of the heat conduction piece (3) is provided with an external thread (31) spirally extending along the axial direction of the heat conduction piece (3), and the external thread (31) is tightly attached to the inner peripheral wall of the heating pipe (2). The heat conduction part (3) is provided with an external thread (31), so that a flow channel (20) extending spirally is formed between the outer peripheral wall of the heat conduction part (3) and the inner peripheral wall of the heating pipe (2), and the heat conduction part (3) is in heat conduction connection with the heating pipe (2) through the external thread (31). The utility model also discloses a household appliance using the heating body. Compared with the prior art, the heating body can avoid vaporization caused by high local water temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a heating body and a household appliance. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for the quality of life. Household electric water heaters with quick heating function are widely used. For example, quick heating faucets, quick heating electric water heaters, quick heating electric kettles, etc. The use of these quick heating household electric water heaters enables people to get hot water in a very short time when they need it, which greatly facilitates people's lives. They have many advantages such as instant heating when powered on, instant shut-off when powered off, and fast heating speed.

[0003] The quick-heating heating body generally includes a shell and a heating tube arranged in the shell. Its specific structure can be found in the Chinese patent "A kind of instant heating body" with patent application number CN202122975880.2.

[0004] In the quick-heating heating body, there must be a part of the water that heats up quickly, and another part of the water that heats up slowly, and there is a difference in the heating speed. When the temperature is set high, due to the high power and high power density, when the water contacts the heating body, it is easy to produce local high temperature, thereby generating a large amount of water vapor. The water vapor prevents the subsequent water from contacting the heating body, so more water vapor will be generated, forming a positive feedback. Therefore, the quick-heating heating body is prone to spraying steam when it discharges high-temperature water, posing a safety hazard. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide a heating body capable of preventing vaporization caused by high local water temperature in view of the current status of the prior art.

[0006] The second technical problem to be solved by the utility model is to provide a household appliance using the above-mentioned heating body.

[0007] The technical solution adopted by the utility model to solve the first technical problem mentioned above is: a heating body, including a shell and a heating tube arranged in the shell, characterized in that: a heat-conducting part arranged along its axial direction is provided in the heating tube, and the peripheral wall of the heat-conducting part has an external thread extending spirally along its axial direction, and the external thread is tightly attached to the inner peripheral wall of the heating tube, so that a flow channel extending spirally is formed between the outer peripheral wall of the heat-conducting part and the inner peripheral wall of the heating tube, and the heat-conducting part is thermally connected to the heating tube through the external thread.

[0008] In order to guide the water entering the flow channel to flow more smoothly and evenly, the end surface of the heat conducting member close to the water inlet end of the flow channel has a first slope that gradually approaches the heating tube along the flow direction of the water.

[0009] In order to make the water flow more gentle and the temperature more uniform, the end surface of the heat conducting member close to the water outlet end of the flow channel has a second inclined surface that gradually moves away from the heating tube along the flow direction of the water.

[0010] In order to form a swirling mixture when the water comes out and ensure that the water temperature is relatively uniform, the two ends of the heating tube are sealed and installed on the shell through sealing rings. The sealing ring is provided with a water hole connected to the flow channel. The sealing ring close to the water outlet end of the flow channel is recorded as a water outlet sealing ring. The inner peripheral wall of the water hole of the water outlet sealing ring has a turbulent structure that can cause water to rotate and flow through the water hole.

[0011] In order to facilitate the processing of the spoiler structure, at least a part of the water through hole of the water outlet sealing ring is a variable diameter section, the diameter of the variable diameter section gradually decreases along the flow direction of the water flow, and at least two guide grooves arranged in sequence along the circumferential direction are opened on the inner circumferential wall of the variable diameter section, and each guide groove extends in a spiral shape along the direction of the diameter contraction of the variable diameter section, and all the guide grooves constitute the spoiler structure.

[0012] In order to make full use of the entire flow channel, the sealing ring close to the water inlet end of the flow channel is recorded as a water inlet sealing ring, and the shell is provided with a water inlet and a water outlet. The water inlet end of the flow channel is connected with the water inlet through the water hole of the water inlet sealing ring, and the water outlet end of the flow channel is connected with the water outlet through the water hole of the water outlet sealing ring.

[0013] In order to ensure that the pipeline is always full and the pipeline flow is stable, the water inlet and the water outlet are respectively located at the bottom and the top of the shell.

[0014] In order to improve the detection accuracy of the temperature sensor, a temperature sensor for monitoring the outlet water temperature is provided on the housing, and the detection end of the temperature sensor extends into the water hole of the outlet water sealing ring.

[0015] In order to facilitate heat transfer, the interior of the heat conducting element is a hollow structure.

[0016] The technical solution adopted by the utility model to solve the second technical problem is: a household appliance using the above-mentioned heating body.

[0017] Compared with the prior art, the advantages of the utility model are: by arranging a heat-conducting member in the heating tube, on the one hand, the volume of the flow channel becomes smaller, so that the residual water inside the heating body becomes less, and the spiral flow channel can extend the water flow heating path, so the temperature rise rate of the internal water in the initial heating of the heating body can be increased; on the other hand, the heat-conducting member is in close contact with the heating tube, and the heat of the heating tube can be conducted through the heat-conducting member, and the heat conduction area is greatly increased, so the heating rate during heating is greatly improved, and the internal heated water temperature can be made more uniform, avoiding the problem of vaporization caused by high local water temperature after heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the heating body in the embodiment of the household appliance of the utility model;

[0019] Figure 2 for Figure 1 A longitudinal cross-sectional view of

[0020] Figure 3 for Figure 1 Schematic diagram of the three-dimensional decomposition of

[0021] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure of the middle water outlet sealing ring. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0024] like Figures 1 to 4 As shown, a preferred embodiment of the utility model is a household appliance with a heating body. The household appliance can be a drinking water device, a beverage making device, a water heater or an instant hot water tap, etc. The heating body includes a housing 1, a heating tube 2, a heat conducting member 3, a sealing ring 4 and a temperature sensor 5.

[0025] The shell 1 is in the shape of an elongated strip and is arranged vertically, and has a water inlet 11 and a water outlet 12 at its bottom and top respectively.

[0026] The heating tube 2 is vertically arranged in the housing 1 .

[0027] The interior of the heat-conducting member 3 is a hollow structure, and is arranged in the heating tube 2 along the axial direction. In this embodiment, the peripheral wall of the heat-conducting member 3 has an external thread 31 extending in a spiral shape along the axial direction thereof, and the external thread 31 is tightly attached to the inner peripheral wall of the heating tube 2, so that a flow channel 20 extending in a spiral shape is formed between the outer peripheral wall of the heat-conducting member 3 and the inner peripheral wall of the heating tube 2, and the heat-conducting member 3 is thermally connected to the heating tube 2 through the external thread 31. Since water enters the bottom of the shell 1 and exits the top of the shell 1, the water flows from bottom to top in the flow channel 20. In this way, on the one hand, the volume of the flow channel 20 becomes smaller, so that the residual water inside the heating body becomes less, and the spiral flow channel 20 can extend the water flow heating path, so the water temperature rise rate of the internal water in the initial stage of heating of the heating body can be increased, that is, the water outlet temperature rate can be increased; on the other hand, the heat conductor 3 is in close contact with the heating tube 2, and the heat of the heating tube 2 can be conducted through the heat conductor 3, and the heat conduction area is greatly increased. Therefore, the heating rate during heating is greatly improved, and the internal heated water temperature can be made more uniform, avoiding the problem of vaporization caused by high local water temperature after heating.

[0028] In addition, the end face of the bottom end of the heat conductor 3 has a first slope 32 that gradually approaches the heating tube 2 along the water flow direction, which can guide the water entering the flow channel 20 to be smoother and more even; the end face of the top end of the heat conductor 3 has a second slope 33 that gradually moves away from the heating tube 2 along the water flow direction, making the water outflow smoother, the temperature more uniform, and allowing the water outflow to more easily contact the temperature sensor 5 described below.

[0029] There are two sealing rings 4, which are respectively marked as a water inlet sealing ring and a water outlet sealing ring. The bottom end and the top end of the heating tube 2 are sealed and installed on the housing 1 through the water inlet sealing ring and the water outlet sealing ring respectively. A water hole 41 is opened on the sealing ring 4, and the water inlet end of the flow channel 20 is connected to the water inlet 11 through the water hole 41 of the water inlet sealing ring, and the water outlet end of the flow channel 20 is connected to the water outlet 12 through the water hole 41 of the water outlet sealing ring. In this embodiment, the lower half of the water hole 41 of the water outlet sealing ring is a variable diameter section 411, the diameter of the variable diameter section 411 gradually decreases along the flow direction of the water flow, and a plurality of guide grooves 4111 arranged in sequence along the circumferential direction are provided on the inner peripheral wall of the variable diameter section 411, and each guide groove 4111 extends in a spiral shape along the diameter contraction direction of the variable diameter section 411, and all the guide grooves 4111 constitute a turbulent structure to make the water flow rotate and flow through the water hole 41, so that the heated water forms a vortex mixture, which can make the heated water temperature more uniform, and the detection after passing through the temperature sensor 5 described below is more accurate, there will be no error, and local vaporization can be avoided to form positive feedback and cause steam spray.

[0030] The temperature sensor 5 is mounted on the top of the housing 1 to monitor the temperature of the water flowing out. In this embodiment, the detection end of the temperature sensor 5 extends into the water hole 41 of the water outlet sealing ring.

[0031] The working principle of this embodiment is as follows: when working, the water flow entering from the water inlet 11 enters the flow channel 20 through the water hole 41 of the water inlet sealing ring. In the process of flowing through the flow channel 20, the water fully exchanges heat with the heating tube 2 and the heat conductor 3. The heating speed is fast and the heating is uniform, avoiding the problem of vaporization caused by local high water temperature. Finally, the hot water is discharged to the water outlet 12 through the water hole 41 of the water outlet sealing ring.

[0032] In the prior art, most machines that use fast-heating heaters generally adopt the method of lowering the maximum temperature setting, or preventing a large amount of steam spray by increasing the subsequent water vapor separation structure. For this solution, since the heating speed is uniform, the problem of local excessive temperature is avoided, so the accuracy of the detection of the water outlet temperature is also improved, and it can truly and accurately reflect the actual temperature, thereby improving the accuracy of temperature control and the setting value of the maximum temperature. At the same time, after improving the heater itself, the prevention structures such as water vapor separation at the rear end can be greatly reduced, thereby improving the availability and usability of the heater.

Claims

1. A heating element, comprising a shell (1) and a heating tube (2) arranged in the shell (1), characterized in that: The heating tube (2) is provided with a heat-conducting member (3) arranged along its axial direction, and the peripheral wall of the heat-conducting member (3) has an external thread (31) extending in a spiral shape along its axial direction, and the external thread (31) is tightly attached to the inner peripheral wall of the heating tube (2), so that a flow channel (20) extending in a spiral shape is formed between the outer peripheral wall of the heat-conducting member (3) and the inner peripheral wall of the heating tube (2), and the heat-conducting member (3) is heat-conductingly connected to the heating tube (2) via the external thread (31).

2. The heating element according to claim 1, characterized in that: The end surface of the heat conducting member (3) close to the water inlet end of the flow channel (20) has a first inclined surface (32) which gradually approaches the heating tube (2) along the flow direction of the water.

3. The heating element according to claim 1, characterized in that: The heat conducting member (3) has a second inclined surface (33) on its end surface close to the water outlet end of the flow channel (20), which gradually moves away from the heating tube (2) along the flow direction of the water.

4. The heating element according to claim 1, characterized in that: The two ends of the heating tube (2) are sealed and mounted on the housing (1) via sealing rings (4); the sealing ring (4) is provided with a water hole (41) connected to the flow channel (20); the sealing ring (4) close to the water outlet end of the flow channel (20) is referred to as a water outlet sealing ring; the inner peripheral wall of the water hole (41) of the water outlet sealing ring has a flow disturbance structure capable of causing water to rotate and flow through the water hole (41).

5. The heating element according to claim 4, characterized in that: At least part of the water hole (41) of the water outlet sealing ring is a variable diameter section (411), the diameter of which gradually decreases along the flow direction of the water flow, and at least two guide grooves (4111) arranged in sequence along the circumferential direction are provided on the inner peripheral wall of the variable diameter section (411), each guide groove (4111) extending in a spiral shape along the direction of the diameter contraction of the variable diameter section (411), and all the guide grooves (4111) constitute the flow disturbance structure.

6. The heating element according to claim 4, characterized in that: The sealing ring (4) on the side close to the water inlet end of the flow channel (20) is recorded as a water inlet sealing ring. The shell (1) has a water inlet (11) and a water outlet (12). The water inlet end of the flow channel (20) is connected to the water inlet (11) through the water through hole (41) of the water inlet sealing ring, and the water outlet end of the flow channel (20) is connected to the water outlet (12) through the water through hole (41) of the water outlet sealing ring.

7. The heating element according to claim 6, characterized in that: The water inlet (11) and the water outlet (12) are respectively located at the bottom and the top of the shell (1).

8. The heating element according to claim 4, characterized in that: The housing (1) is provided with a temperature sensor (5) for monitoring the temperature of water outlet, and the detection end of the temperature sensor (5) extends into the water through hole (41) of the water outlet sealing ring.

9. The heating element according to any one of claims 1 to 8, characterized in that: The interior of the heat conducting element (3) is a hollow structure.

10. A household appliance using the heating element according to any one of claims 1 to 9.

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