A high-efficiency liquid heater and its instantaneous electric water heater

Abstract

This invention discloses a high-efficiency liquid heater and its instantaneous electric water heater, comprising a liquid storage device and a heating element for heating the liquid storage device. The liquid storage device is provided with an inlet, an outlet, and a flow channel connecting the inlet and the outlet. The liquid storage device includes at least two flat liquid storage sections and a connecting section connecting the liquid storage sections. The at least two liquid storage sections are arranged sequentially at intervals to form heating gaps between adjacent liquid storage sections. At least one heating element is arranged in the heating gap, and the heating gap is filled with a thermally conductive material to integrally form the liquid storage device and the heating element. Each liquid storage section has a liquid storage cavity corresponding to its internal structure, and several heat transfer channels isolated from the liquid storage cavity are formed between the upper and lower walls of the corresponding liquid storage cavity. This invention has a simple and reasonable structure, is easy to manufacture, reduces heating energy consumption, and improves heating efficiency.

Description

Technical Field

[0001] This invention relates to the field of heater equipment technology, and in particular to a high-efficiency liquid heater and its instantaneous electric water heater. Background Technology

[0002] A liquid heater is a device that heats a liquid using an electric heating element. For example, a Chinese invention patent (authorization announcement number CN201348353) discloses a liquid heater, the specific technical solution of which includes: several flat heat exchange sections, a connecting section connecting the heat exchange sections, and a heating element and an insulator disposed between the heat exchange sections. Each heat exchange section has a connecting hole at both ends. The connecting section has a through hole and a connecting part near both ends. Both ends of the connecting section are inserted into the connecting hole and abut against the heat exchange section through the connecting part, thereby sealing two adjacent heat exchange sections together through the connecting part. The heat exchangers are connected through through holes, and a gap is formed between two adjacent heat exchangers. The heating element and the insulator located between the heat exchanger and the heating element are sandwiched in the gap. The heating element of the liquid heater is clamped and fixed between the heat exchangers. The contact area between the heating element and the heat exchanger is small and there is a gap between them. The air in the gap will block heat transfer, resulting in low overall heating efficiency and high energy consumption. At the same time, the outer end faces of the two outermost heat exchangers are not heated by the heating element. The heat generated by the heating element needs to be transferred over the outer edge of the heat exchanger to the outermost end face. The heat transfer distance is long, resulting in low overall heating efficiency and room for improvement. Summary of the Invention

[0003] This invention aims to overcome the shortcomings of the prior art by providing a high-efficiency liquid heater with a simple and reasonable overall structure that is easy to manufacture. The liquid storage device and heating element are cast into one piece using a heat-conducting material, resulting in a more stable and reliable overall structure. This effectively increases the contact heat transfer area and improves heating efficiency. Simultaneously, the heat transfer channel effectively reduces the heating and heat transfer distance between the heating element and the outermost end face of the liquid storage section, improving the heating effect of the outermost end face and thus enhancing the overall heating efficiency of the liquid heater. Furthermore, this invention provides an instant electric water heater with the aforementioned characteristics.

[0004] To achieve the above objectives, the present invention provides a high-efficiency liquid heater, including a liquid storage device and a heating element for heating the liquid storage device, wherein the liquid storage device is provided with an inlet, an outlet, and a flow channel communicating between the inlet and the outlet.

[0005] The liquid storage device includes at least two flat liquid storage sections, and the at least two liquid storage sections are arranged sequentially at intervals to form a heating gap between adjacent liquid storage sections. At least one heating element is arranged in the heating gap. The heating gap is also filled with a thermally conductive material to cast the liquid storage device and the heating element into one piece. The thermally conductive material forms a thermally conductive part in the heating gap.

[0006] Each of the liquid storage sections has a liquid storage cavity corresponding to its internal structure, and a plurality of heat transfer channels isolated from the liquid storage cavity are formed between the upper and lower walls of the liquid storage cavity.

[0007] The further configuration includes a heat transfer shell that surrounds the liquid storage device, wherein a heat transfer column is provided at the corresponding heat transfer channel between the heat transfer shell and the heat conduction part.

[0008] The method is further configured such that, during the casting process, the thermally conductive material flows into the heat transfer channel to form a heat transfer column, and flows to the outside of the liquid storage device to form a heat transfer shell.

[0009] The configuration is further defined as follows: several heat transfer channels on the liquid storage section are arranged in a staggered manner and form a turbulence structure inside the liquid storage cavity.

[0010] The liquid storage section is further configured such that: the liquid storage section includes a first heat exchange plate and a second heat exchange plate, the first heat exchange plate is provided with a plurality of downwardly recessed first protrusions and the bottom of the first protrusions is provided with a first through hole;

[0011] The second heat exchange plate is provided with a second protrusion that corresponds to the first protrusion and is raised upward, and a second through hole is provided on the top of the second protrusion;

[0012] The first heat exchange plate and the second heat exchange plate are sealed and connected to form a liquid storage cavity. The bottom of the first convex bulge and the top of the second convex bulge are sealed and connected by a support, and the first through hole and the second through hole are connected.

[0013] The configuration is further defined as follows: in two adjacent liquid storage sections, the second heat exchange plate of the upper liquid storage section has a first communication port and a first abutment edge extending downward along the edge of the first communication port; the first heat exchange plate of the lower liquid storage section has a second communication port corresponding to the first communication port and a second abutment edge extending upward along the edge of the second communication port; the first abutment edge and the second abutment edge are connected to each other to realize the connection between the liquid storage chambers of the two adjacent liquid storage sections.

[0014] A further configuration is made whereby the liquid storage units are connected by a connecting pipe.

[0015] The present invention also provides an instant electric water heater having the above-mentioned high-efficiency liquid heater.

[0016] Compared with existing technologies, the present invention has a simple and reasonable structure. The liquid storage device and the heating element are cast into one piece by using a heat-conducting material, and a heat transfer shell is formed on the outside of the liquid storage device. This effectively increases the contact heat transfer area and improves the heating efficiency. At the same time, a heat transfer channel is formed on the liquid storage part, which effectively shortens the heating heat transfer distance of the heating element to the outermost end face and improves the heating efficiency of the outermost end face. The heat transfer channel forms a turbulence structure in the liquid storage cavity (flow channel) to disturb the liquid flow, which strengthens the pressure resistance and greatly improves the overall heating efficiency of the liquid heater and reduces energy consumption. The instantaneous electric water heater with this liquid heater also has the above advantages. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a high-efficiency liquid heater according to the present invention;

[0018] Figure 2 This is a schematic diagram of the separate structure of a liquid heater (electric heating element).

[0019] Figure 3 This is a schematic diagram of the vertical cross-sectional structure (along the length direction) of the high-efficiency liquid heater of the present invention.

[0020] Figure 4 This is a view of the separated structure of the liquid storage section;

[0021] Figure 5 This is a schematic diagram of a separate structure (electric heating element) for another implementation of a liquid heater.

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

[0023] 100. Liquid storage device; 101. Liquid inlet; 102. Liquid outlet; 1. Liquid storage section; 11. First heat exchange plate; 111. First convex bulge; 112. First through hole; 113. Second abutment edge; 12. Second heat exchange plate; 121. Second convex bulge; 122. Second through hole; 123. First abutment edge; 200. Heating element; 300. Heat-conducting section; 400. Heat transfer shell; 500. Heat transfer column; A. Liquid storage cavity; B. Heat transfer channel. Detailed Implementation

[0024] The following detailed description of a specific embodiment of the present invention is provided in conjunction with 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 invention provides a high-efficiency liquid heater, such as... Figures 1 to 5As shown, the device includes a liquid storage device 100 and a heating element 200 for heating the liquid storage device 100. The liquid storage device 100 is provided with an inlet 101, an outlet 102, and a flow channel connecting the inlet 101 and the outlet 102. The heating element 200 can be an electric heating tube. Figure 2 Heating wire, heating block, heating element ( Figure 5 (e.g., to heat the liquid flowing through the flow channel.)

[0026] In the above scheme, such as Figure 2 and Figure 3 As shown, the liquid storage device 100 includes at least two liquid storage sections 1, which are stacked sequentially at intervals to form a heating gap between adjacent liquid storage sections 1. At least one heating element 200 is arranged in the heating gap, and a thermally conductive material is also filled in the heating gap to cast the liquid storage device 100 (at least two liquid storage sections 1) and the heating element 200 into one piece. The thermally conductive material forms a thermally conductive part 300 in the heating gap. This effectively ensures the overall structural stability of the liquid heater, increases the heat transfer area, reduces thermal inertia, greatly improves heating efficiency, and reduces energy consumption. The thermally conductive material is preferably a metal such as aluminum, iron, or copper.

[0027] In the above scheme, such as Figure 3 As shown, each liquid storage section 1 of the liquid storage device 100 has a liquid storage cavity A corresponding to its internal structure. A heat transfer channel B, isolated from the liquid storage cavity A, is formed between the upper and lower walls of the liquid storage section 1 and the liquid storage cavity A. In this way, the heat generated by the heating element 200 located on the inner side can be directly conducted to the outer side through the heat transfer channel B, effectively shortening the heat transfer distance and improving the heating efficiency. At the same time, during the casting process, the liquid storage device 100 and the heating element 200 are placed in a specific mold, and then molten heat-conducting material is injected into the mold to store the liquid storage device. The liquid storage device 100 and the heating element 200 are cast as one piece. Molten heat-conducting material forms a heat-conducting part 300 in the heating gap. The heat-conducting material flows to the outside of the liquid storage device 100 to correspond to the heat transfer shell 400, and flows into the heat transfer channel B to form a heat transfer column 500 structure. The heating element 200 can directly transfer heat to the outermost end face through this heat transfer column 500 structure. This greatly simplifies the overall manufacturing of the liquid heater, ensures the stability of the overall structure, increases the contact heat transfer area, reduces thermal inertia, and improves heating efficiency.

[0028] In the above scheme, the specific details are as follows: Figure 4The liquid storage section 1 includes a first heat exchange plate 11 and a second heat exchange plate 12. The first heat exchange plate 11 has a plurality of downwardly recessed first protrusions 111, and the bottom of each first protrusion 111 has a first through hole 112. The second heat exchange plate 12 has a plurality of upwardly raised second protrusions 121, and the top of each second protrusion 121 has a second through hole 122. The first heat exchange plate 11 and the second heat exchange plate 12 are welded together in a sealing fit to form a liquid storage cavity A. At this time, the bottom of the first protrusion 111 of the first heat exchange plate 11 is connected to the second heat exchange plate 12. The top of the second protrusion 121 of the heat exchange plate 12 is welded together in a sealed fit, and the first through hole 112 and the second through hole 122 are connected to form a heat transfer channel B. Preferably, the heat transfer channels B on the liquid storage part 1 are staggered to form a turbulence structure in the liquid storage cavity A. Specifically, the first protrusion 111 on the first heat exchange plate 11 and the second protrusion 121 on the second heat exchange plate 12 are staggered. The turbulence structure formed by the heat transfer channels B in the liquid storage cavity A disturbs the liquid flow, which can effectively enhance heat transfer and improve heating efficiency.

[0029] In the above scheme, each liquid storage unit 1 of the liquid storage device 100 of this patent can be used individually or connected in series as a whole. When used individually, each liquid storage unit 1 has an inlet 101 and an outlet 102. When connected in series, the entire liquid storage device 100 has only one inlet 101 and one outlet 102, and the liquid storage units 1 are provided with a communication structure to connect multiple liquid storage chambers A in series to form a flow channel. The structure forms a structure in which liquid flows in from the inlet 101 and flows through each liquid storage chamber A in sequence, and finally flows out from the outlet 102. In this embodiment, the specific details are as follows: Figure 2 and Figure 4 As shown, in two adjacent liquid storage sections 1, the second heat exchange plate 12 of the upper liquid storage section 1 has a first communication port and a downwardly extending first abutment edge 123 is provided along the edge of the first communication port. The first heat exchange plate 11 of the lower liquid storage section 1 has a second communication port corresponding to the first communication port and an upwardly extending second abutment edge 113 is provided along the edge of the second communication port. The first abutment edge 123 and the second abutment edge 113 abut against each other and are welded together to realize the connection between the liquid storage chambers A of the two adjacent liquid storage sections 1. The first abutment edge and the second abutment edge 113 cooperate to form a communication structure between the liquid storage sections 1. In this way, all structures are integrated on the heat exchange plate. By stacking and welding the heat exchange plates together, a liquid storage device 100 that connects the liquid storage sections 1 is formed, which greatly simplifies the manufacturing of the liquid storage device 100 and the overall manufacturing of the liquid heater. Similarly, the connection between the liquid storage sections 1 can also be realized by a detachable or integrally connected connecting pipe.

[0030] The present invention also provides an instant electric water heater having the above-mentioned high-efficiency liquid heating element, which heats water to produce hot water, and thus the instant electric water heater also has all the advantages of the above-mentioned high-efficiency liquid heater.

[0031] Compared with existing technologies, the present invention has a simple and reasonable structure. The liquid storage device and the heating element are cast into one piece by using a heat-conducting material, and a heat transfer shell is formed on the outside of the liquid storage device. This effectively increases the contact heat transfer area and improves the heating efficiency. At the same time, a heat transfer channel is formed on the liquid storage part, which effectively shortens the heating heat transfer distance of the heating element to the outermost end face and improves the heating efficiency of the outermost end face. The heat transfer channel forms a turbulence structure in the liquid storage cavity (flow channel) to disturb the liquid flow, which strengthens the pressure bearing capacity of the liquid storage part and greatly improves the overall heating efficiency of the liquid heater and reduces energy consumption. The instantaneous electric water heater with this liquid heater also has the above advantages.

[0032] The above-disclosed embodiments are merely examples of the present invention. However, the present invention 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 invention.

Claims

1. A high-efficiency liquid heater, comprising a liquid storage device and a heating element for heating the liquid storage device, wherein the liquid storage device is provided with an inlet, an outlet, and a flow channel communicating between the inlet and the outlet; Its features are, The liquid storage device includes at least two flat liquid storage sections, and the at least two liquid storage sections are arranged sequentially at intervals to form a heating gap between adjacent liquid storage sections. At least one heating element is arranged in the heating gap. The heating gap is also filled with a thermally conductive material to cast the liquid storage device and the heating element into one piece. The thermally conductive material forms a thermally conductive part in the heating gap. Each of the liquid storage sections has a liquid storage cavity corresponding to its internal structure, and a plurality of heat transfer channels isolated from the liquid storage cavity are formed between the upper and lower walls of the liquid storage cavity. It also includes a heat transfer shell that is wrapped around the outside of the liquid storage device, and a heat transfer column is provided at the corresponding heat transfer channel between the heat transfer shell and the heat conduction part. During the casting process, the thermally conductive material flows into the heat transfer channel to form a heat transfer column and flows to the outside of the liquid storage device to form a heat transfer shell. The liquid storage section includes a first heat exchange plate and a second heat exchange plate. The first heat exchange plate is provided with a plurality of downwardly recessed first protrusions and a first through hole is provided on the bottom of the first protrusion. The second heat exchange plate is provided with a second protrusion that corresponds to the first protrusion and is raised upward, and a second through hole is provided on the top of the second protrusion; The first heat exchange plate and the second heat exchange plate are sealed and connected to form a liquid storage cavity. The bottom of the first convex bulge and the top of the second convex bulge are sealed and connected by a support, and the first through hole and the second through hole are connected to form a heat transfer channel.

2. The high-efficiency liquid heater according to claim 1, characterized in that, The heat transfer channels on the liquid storage section are staggered and form a turbulence structure inside the liquid storage cavity.

3. A high-efficiency liquid heater according to claim 1, characterized in that, In two adjacent liquid storage sections, the second heat exchange plate of the upper liquid storage section has a first connecting port and a first abutting edge extending downward along the edge of the first connecting port. The first heat exchange plate of the lower liquid storage section has a second connecting port corresponding to the first connecting port and a second abutting edge extending upward along the edge of the second connecting port. The first abutting edge and the second abutting edge abut and connect to each other to realize the connection between the liquid storage chambers of the two adjacent liquid storage sections.

4. A high-efficiency liquid heater according to claim 1, characterized in that, The liquid storage units are connected by a connecting pipe.

5. An instantaneous electric water heater, characterized in that, The high-efficiency liquid heater as described in any one of claims 1-4.

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