Instant heating body assembly for drinking water equipment

Abstract

The utility model discloses an instant heating type heating body assembly for drinking water equipment, which comprises a heating pipe, a water inlet end cover, a water outlet end cover and a heating electrode, the heating pipe is of a cylindrical structure, and the water inlet end cover and the water outlet end cover are respectively arranged at an inlet end and an outlet end of the heating pipe in a sealing fit mode. One end of the heating electrode is sleeved on the heating pipe, and the other end of the heating electrode is connected with an external power supply; a plurality of protruding parts are arranged on the inner wall of the heating pipe in the flowing direction, and every two adjacent protruding parts in the flowing direction are arranged in a staggered mode. According to the utility model, the lug bosses are arranged on the inner wall of the heating pipe, so that the direct effective contact area between the heating pipe and water is effectively increased, and the heating efficiency is improved; meanwhile, violent turbulent flow can be formed through the action of the protruding parts which are arranged in a staggered mode and water flow, so that generation of bubbles is effectively reduced, and the service life of the heating pipe is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of drinking water heating technology, and in particular to an instant heating element assembly for drinking water equipment. Background Technology

[0002] Instantaneous heating elements are now widely used in household appliances such as water dispensers and water purifiers. They eliminate the need for pre-boiling water and long waiting times, providing instant heating and great convenience to consumers. However, existing instantaneous heating elements used in household water dispensers, such as straight-tube heating elements made of quartz or silicon nitride, suffer from problems. Because the inner wall of the heating tube is smooth, the fluid (water) is in a relatively stable laminar flow state during heating, which easily leads to the formation of tiny bubbles on the inner surface. This results in reduced heat transfer capacity and decreased thermal efficiency. Simultaneously, the formation of bubbles reduces the surface area of ​​the inner tube, increasing its power density. Furthermore, the temperature inside the bubbles is higher than the surrounding water temperature, causing the tube wall occupied by the bubbles to be in a dry-burning state. Prolonged operation under this condition significantly reduces the lifespan of the heating element.

[0003] To address the aforementioned issues, a prior Chinese patent application (CN107007153A) proposed a solution for a spiral heating device for a fast-heating water dispenser. This solution involves installing a threaded rod inside the heating tube, allowing water to flow spirally along the gap between the threaded rod and the heating tube. This results in a longer and more stable water channel, effectively improving thermal efficiency. The spiral operation also reduces bubble formation, thus extending the lifespan of the heating tube. However, installing a threaded rod inside the heating tube increases the manufacturing cost of the heating element assembly and also increases water resistance, significantly affecting flow rate, leaving room for improvement. Utility Model Content

[0004] This invention aims to overcome the shortcomings of the prior art by providing an instant heating element assembly for drinking water equipment. The heating tube with protrusions on its inner wall can be easily sintered using a mold, making it convenient to manufacture and cost-effective. At the same time, the protrusions effectively increase the effective contact area between the heating tube and the water flow, thereby improving thermal efficiency. Furthermore, the staggered arrangement of the protrusions interacts with the water flow to create intense turbulence, effectively reducing the generation of bubbles and thus extending the lifespan of the heating tube.

[0005] To achieve the above objectives, this utility model provides an instant heating element assembly for a drinking water device, including a heating tube, an inlet end cap, an outlet end cap, and a heating electrode. The heating tube has a cylindrical structure. The inlet end cap and the outlet end cap are respectively sealed and fitted at the inlet and outlet ends of the heating tube. One end of the heating electrode is sleeved on the heating tube, and the other end is connected to an external power source. The inner wall of the heating tube has a plurality of protrusions arranged along the flow direction, and adjacent protrusions in the flow direction are staggered.

[0006] The configuration is further defined as follows: a plurality of the protrusions are arranged in a ring-shaped interval on the radial inner wall of the heating tube and in a multi-ring-shaped interval on the axial inner wall of the heating tube.

[0007] The protrusion is further configured as follows: the protrusion is a circular convex hull structure.

[0008] The water inlet cap is further configured to have an inlet bend for guiding the fluid to form a vortex at the inlet of the heating pipe.

[0009] The heating element is further configured to be a PTC ceramic tube, which is integrally sintered using a mold.

[0010] The further configuration includes a housing disposed outside the heating tube, the housing comprising two constraint members disposed outside the inlet end cap and the outlet end cap respectively, and at least one connecting member connecting the two constraint members.

[0011] The water inlet cap and the water outlet cap each include a cap body portion that is sleeved on the port of the heating tube, and an interface portion that is connected to the sleeve portion.

[0012] Each of the aforementioned constraint members includes a U-shaped frame that is fitted onto the interface portion and presses against the cover portion, and a blocking member that is connected between the two sides of the opening of the U-shaped frame and presses against the end of the interface portion.

[0013] The connecting member is further configured as follows: the connecting member is a U-shaped groove, and the connecting member is sleeved on the ends of the two U-shaped frames and fixedly connected to each other by screws.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] 1. The heating tube and the protrusions on its inner wall can be integrally sintered by mold, which is convenient to manufacture and has low manufacturing cost;

[0016] 2. Several protrusions were added inside the heating tube, which greatly increased the surface area inside the heating element, increasing the effective contact area with water. This facilitates the rapid transfer of heat to the heated liquid. At the same time, under the condition of fixed power, according to the power density calculation formula ρ=P / S, the increase in surface area S reduces the power density of the heating element. Lower power density is beneficial to improving the life of the heating tube.

[0017] 3. When water enters the heating element, it impacts the protrusions on the inner wall of the heating tube, forcing the water to disperse. At the same time, the protrusions are arranged in an alternating pattern in the direction of water flow. In this way, the water is constantly dispersed and then rejoined to create intense turbulent motion inside the heating tube. This intense water flow makes it difficult for tiny bubbles to form on the inner wall of the heating tube, because bubbles are very easily broken by the disturbance caused by turbulence.

[0018] 4. By changing the water inlet angle through the inlet bend, a vortex is formed at the water inlet in the heating tube. The vortex continuously spreads forward along the flow direction in the heating tube and then flows out from the outlet of the heating tube. Under these complex water flow conditions, turbulence will be further generated. The vortex motion in the turbulence increases the fluid pull, causing the heated liquid to continuously scour the inner wall of the heating tube, further preventing the generation and accumulation of bubbles. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of an instant heating element assembly for a drinking water device according to this utility model;

[0020] Figure 2 This is a schematic diagram of the axial cross-sectional structure of the heating element assembly;

[0021] Figure 3 This is a schematic diagram of the partially separated structure of the heating element assembly.

[0022] The following reference numerals are marked on the accompanying drawings:

[0023] 100. Heating element; 101. Protrusion; 110. Inlet cap; 120. Outlet cap; 121. Cover; 122. Interface; 130. Heating electrode; 140. Inlet bend; 200. Outer shell; 210. Restraining member; 211. U-shaped frame; 212. Blocking member; 220. Connecting member. Detailed Implementation

[0024] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0025] This utility model discloses an instant heating element assembly for a drinking water device, such as... Figure 1 As shown, it includes a heating tube 100, an inlet cap 110, an outlet cap 120, and a heating electrode 130. The heating tube 100 is a cylindrical straight tube structure. The inlet cap 110 and the outlet cap 120 are respectively sealed at the inlet and outlet ends of the heating tube 100. One end of the heating electrode 130 is fitted onto the heating tube 100, and the other end is connected to an external power source. In this way, the heating tube 100 can heat the water flowing through its inner cavity by heating the heating electrode 130.

[0026] In this embodiment, the inner wall of the heating tube 100 is provided with a plurality of protrusions 101 along the flow direction of the water flow, and adjacent two protrusions 101 in the flow direction are staggered. The protrusions 101 are preferably circular convex structures. In this way, the arrangement of the protrusions 101 not only increases the effective contact area between the inner wall of the heating tube 100 and the water flow, but also the staggered arrangement of the protrusions 101 can make the water flow continuously dispersed and continuously merged to form a violent turbulent motion inside the heating tube 100. This violent water flow makes it difficult for tiny air bubbles to be generated on the inner wall of the heating tube 100, thereby ensuring the service life of the heating tube 100.

[0027] In the above scheme, a number of protrusions 101 are arranged in a ring structure with circumferential intervals on the radial inner wall of the heating pipe 100 and in multiple rings with intervals on the axial (water flow direction) inner wall of the heating pipe 100, with the protrusions 101 on adjacent rings being staggered.

[0028] In this embodiment, the heating tube 100 is a PTC ceramic tube, which is integrally sintered by a mold. By improving the mold, it is easy to add tiny protrusions 101 on the inner wall of the heating tube 100. In this way, while ensuring the heating effect of the heating tube 100, the manufacturing of the heating tube 100 is greatly simplified and the manufacturing cost is reduced.

[0029] In this embodiment, the water inlet cap 110 is connected to a water inlet bend 140 for guiding the fluid to form a vortex at the inlet of the heating tube 100. The water inlet bend 140 changes the direction of fluid inflow, which facilitates the formation of a vortex at the inlet of the heating tube 100. The vortex continuously diffuses forward along the flow direction inside the heating tube 100 and then flows out from the outlet of the heating tube 100. Under these complex water flow conditions, turbulence will be further generated. The vortex motion in the turbulence increases the fluid pull, causing the heated liquid to continuously scour the inner wall of the heating tube 100, further preventing the generation and accumulation of bubbles, thereby ensuring the service life of the heating tube 100.

[0030] In this embodiment, the heating element assembly also includes a housing 200 disposed outside the heating tube 100. The housing 200 can protect the heating tube 100. The housing 200 includes two constraint members 210 disposed outside the water inlet end cap 110 and the water outlet end cap 120 respectively, and at least one connecting member 220 connected between the two constraint members 210. The connecting member 220 is used to tighten and hold the constraint members 210 at both ends. The two constraint members 210 are used to clamp and constrain the water inlet and outlet end caps 120 so that they are securely installed on the port of the heating tube 100, ensuring the pressure resistance of the end caps and the heating tube 100.

[0031] In the above scheme, both the inlet cap 110 and the outlet cap 120 include a cap body 121 that mates with the port of the heating pipe 100, and an interface 122 connected to the cap body 121; the constraint member 210 includes a U-shaped frame 211 that is sleeved on the interface 122 and presses against the cap body 121, and a blocking member 212 that is installed between the openings of the U-shaped frame 211 and presses against the end of the interface 122; the connecting member 220 is a U-shaped groove, and the connecting member 220 is sleeved on both ends. The ends of the U-shaped frame 211 are fixedly connected by screws. In this embodiment, there are two connecting members 220 arranged with their slots facing each other to surround the heating tube. Thus, the constraint members 210 at both ends are tightened by at least one connecting member 220 so that the inlet and outlet end caps 120 are firmly installed on the port of the heating tube 100. At the same time, the bottom wall of the connecting member 220 can also be used as a plane for installing other functional components (such as thermostats), thereby greatly improving the integration rate of the heating element assembly and reducing its size.

[0032] The above-disclosed embodiments are merely examples of the present utility model. However, the present utility model is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. An instant heating element assembly for a drinking water device, comprising a heating tube, an inlet end cap, an outlet end cap, and a heating electrode, wherein the heating tube has a cylindrical structure, the inlet end cap and the outlet end cap are respectively sealed and fitted at the inlet and outlet ends of the heating tube, and one end of the heating electrode is sleeved on the heating tube and the other end is connected to an external power source; characterized in that, The inner wall of the heating tube has several protrusions arranged along the flow direction, and adjacent protrusions in the flow direction are staggered.

2. The instant heating element assembly for a drinking water device according to claim 1, characterized in that, The protrusions are arranged in a ring-shaped interval on the radial inner wall of the heating tube and in a multi-ring-shaped interval on the axial inner wall of the heating tube.

3. The instant heating element assembly for a drinking water device according to claim 1, characterized in that, The protrusion is a circular convex hull structure.

4. The instant heating element assembly for a drinking water device according to claim 1, characterized in that, The inlet cap is connected to an inlet bend for guiding the fluid to form a vortex at the inlet of the heating pipe.

5. The instant heating element assembly for a drinking water device according to claim 1, characterized in that, The heating element is a PTC ceramic tube, which is integrally sintered using a mold.

6. The instant heating element assembly for a drinking water device according to claim 1, characterized in that, It also includes a housing disposed outside the heating tube, the housing comprising two constraint members disposed outside the water inlet end cap and the water outlet end cap respectively, and at least one connecting member connected between the two constraint members.

7. The instant heating element assembly for a drinking water device according to claim 6, characterized in that, Both the inlet cap and the outlet cap include a cap body that is fitted onto the port of the heating tube, and an interface portion connected to the fitting body. Each of the aforementioned constraint members includes a U-shaped frame that is fitted onto the interface portion and presses against the cover portion, and a blocking member that is connected between the two sides of the opening of the U-shaped frame and presses against the end of the interface portion.

8. The instant heating element assembly for a drinking water device according to claim 7, characterized in that, The connecting component is a U-shaped groove, which is sleeved on the ends of the two U-shaped frames and is fixedly connected to each other by screws.

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