A steam generator

Abstract

The utility model discloses a steam generator, including metal box and circuit board, the circuit board passes through heat exchange layer and is installed one side of metal box, be provided with resistance on the circuit board, be provided with the runner in the metal box. Through heat exchange layer connection circuit board and metal box, the heat of resistance on circuit board is conducted to the metal box, improves the heat conduction efficiency, improves the electric safety, can realize the miniaturization or microification of steam generator, and easily install.

Description

Technical Field

[0001] This utility model relates to the field of electric heating technology, specifically to a steam generator. Background Technology

[0002] A steam generator is a mechanical device that uses the thermal energy of fuel or other energy sources to heat water into hot water or steam. Existing technology uses large equipment such as boilers and heating coils to generate steam using electric energy. These devices are bulky and difficult to apply to lightweight applications, such as steam mops.

[0003] CN217441597U discloses a micro steam generator that tightly integrates a thick-film heater and a steam generating chamber, allowing the heat generated by the thick-film heater to be quickly and effectively transferred to the steam generating chamber. The power connection structure offers advantages such as reliable connection, secure installation, and low cost. The thick-film heater uses a stainless steel substrate, an electrothermal layer, and an insulating dielectric layer, with the metal substrate tightly fitted to the steam generating chamber. However, in actual production, it is difficult to ensure a tight fit between the metal substrate and the steam generating chamber, resulting in low thermal efficiency. Utility Model Content

[0004] In view of the above-mentioned technical problems existing in the prior art, this utility model provides a steam generator to improve heat exchange efficiency.

[0005] This utility model discloses a steam generator, including a metal box and a circuit board; the circuit board is mounted on one side of the metal box through a heat exchange layer; a resistor is provided on the circuit board; and a flow channel is provided inside the metal box.

[0006] Preferably, the heat exchange layer includes a solder layer; the circuit board is a printed circuit board.

[0007] Preferably, the circuit board is provided with at least two sets of connection components, and the two ends of the resistor are respectively connected to one set of connection components;

[0008] The flow channel is provided with connectors at both ends.

[0009] Preferably, at least one transversely arranged flow segment is provided at intervals within the flow channel;

[0010] The two adjacent flow sections are connected.

[0011] Preferably, the flow channel has an odd number of flow segments.

[0012] Preferably, an even number of flow sections are provided in the flow channel.

[0013] Preferably, the resistor comprises a plurality of laterally extending resistor pieces, with adjacent resistor pieces connected by a connecting portion;

[0014] The resistor is positioned on the upper side of the flow section.

[0015] Preferably, one side of the metal box is provided with at least one positioning element that mates with the circuit board.

[0016] Preferably, it also includes a housing disposed on the outside of the circuit board and the metal box.

[0017] Preferably, the side wall of the housing is provided with a bendable mounting component;

[0018] A thermostat is mounted on the top plate of the housing; the sensor end of the thermostat is attached to the circuit board.

[0019] A through hole is provided on one side of the top plate, and a snap-fit ​​component is provided on the side wall. The top plate is fixed to the side wall by bending the snap-fit ​​component.

[0020] One end of the resistor is connected to the temperature controller via a first connecting line;

[0021] The other end of the resistor is connected to a second connecting line;

[0022] A heat-resistant sleeve is provided on the second connecting line, and the heat-resistant sleeve is clamped between the metal box and the shell.

[0023] Compared with the prior art, the beneficial effects of this utility model are: by connecting the circuit board and the metal box through the heat exchange layer, the heat generated by the resistance on the circuit board is conducted to the metal box, thereby improving the heat conduction efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the steam generator in Example 1;

[0025] Figure 2 This is a cross-sectional view of the metal box in Example 1;

[0026] Figure 3 This is a schematic diagram of the heat exchange layer distribution;

[0027] Figure 4 This is a schematic diagram of the limiting boss structure in Embodiment 2;

[0028] Figure 5 This is a schematic diagram of the steam generator in Example 3;

[0029] Figure 6 This is a cross-sectional view of the metal box in Example 3;

[0030] Figure 7 This is a schematic diagram of the steam generator in Example 4.

[0031] The diagram shows the following markings: 1. Steam generator; 2. Metal box; 21. Connector; 22. Box body; 23. Flow channel; 24. Flow section; 25. Box cover; 26. Shoulder; 27. Positioning component.

[0032] 3. Circuit board; 32. Resistor; 33. Resistor element; 34. Connecting part; 4. Heat exchange layer;

[0033] 5. Connecting component; 51. Connecting base; 52. First connecting wire; 53. Second connecting wire; 6. Thermostat; 7. Housing; 71. Side wall; 72. Top plate; 73. Clamping piece; 74. Through hole; 75. Mounting piece; 76. Heat-resistant sleeve. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The present invention will now be described in further detail with reference to the accompanying drawings:

[0036] Example 1 provides a steam generator 1, such as Figures 1-7 As shown, it includes a metal box 2 and a circuit board 3; a heat exchange layer 4 is provided between the circuit board 3 and the metal box 2, i.e. Figure 3 The circuit board 3 is mounted on one side of the metal box 2 via the heat exchange layer 4; a resistor 32 is provided on the circuit board 3 for heating; and a flow channel 23 is provided inside the metal box 2.

[0037] By connecting the circuit board 3 and the metal box 2 through the heat exchange layer, the heat generated by the resistor 32 on the circuit board 3 is conducted to the metal box 2, thereby improving the heat conduction efficiency.

[0038] The heat exchange layer 4 includes, but is not limited to, a solder layer. The circuit board 3 is a printed circuit board. The water flow temperature in the flow channel inside the metal box 2 is uneven, with a low inlet temperature and a high downstream temperature. The heat exchange layer can redistribute or balance the heat of the circuit board 3, preventing an increase in the temperature difference between the front and rear ends of the resistor 32 and resulting in a more uniform temperature distribution.

[0039] like Figure 1 The circuit board 3 is provided with at least two sets of connection components 5. The two ends of the resistor 32 are respectively connected to one set of connection components 5 for electrical connection of the circuit board 3. The two ends of the flow channel 23 are respectively provided with connectors 21.

[0040] Specifically, one connector 21 and a set of connecting assemblies 5 are located on the left side of the steam generator 1; another connector and a set of connecting assemblies 5 are located on the right side of the steam generator 1. The connector 21 and the set of connecting assemblies 5 on the same side are spaced apart in height and / or front-to-back direction. More specifically, Figure 1 The connector 21 on the left side is located on the back and bottom of the paper; the connecting assembly 5 is located on the front and top. This avoids or reduces interference between different components, facilitating installation or production assembly; on the other hand, it improves the degree of separation between water and electricity, enhancing safety.

[0041] In one specific embodiment, the metal box 2 can be a single piece.

[0042] In another specific embodiment, such as Figure 2 The metal box 2 includes a box body 22, and a flow channel 23 is disposed in a groove of the box body 22; the box cover 25 is installed on the outside of the groove. More specifically, a shoulder 26 is provided in the groove, and the box cover 25 is welded to the shoulder 26, which facilitates the installation and sealing of the box cover 25.

[0043] Multiple transversely arranged flow sections 24 are spaced apart within the flow channel 23, with adjacent flow sections 24 interconnected. The number of flow sections 24 is odd, such as 3-5 sections. In a specific test, the outlet water temperature of the three-flow-section steam generator was 60.7-53.4 degrees Celsius, with an average temperature of 56.2 degrees Celsius over 40-120 seconds, and a thermal efficiency of 96.3%. Under the same conditions, the outlet water temperature of the five-flow-section steam generator was 58.8-54.9 degrees Celsius, with an average temperature of 56.2 degrees Celsius over 40-120 seconds, and a thermal efficiency of 95.2%. During the test, a large current was not used for ease of thermal efficiency calculation; the five-flow-section outlet water temperature is more uniform, but considering the product size and processing difficulty, the three-flow-section model was preferred.

[0044] In another specific test, the resistance of resistor 32 was 1.8 ohms, and it could generate 270W of power at 22V, which could continuously and effectively produce steam.

[0045] like Figure 4 and Figure 5 In Embodiment 2, at least one positioning element 27 that cooperates with the circuit board 3 is provided on one side of the metal box 2, which facilitates installation and positioning. Figure 4 A positioning element 27 is provided on the left and right sides of the top of the metal box 2. Figure 5 A positioning element 27 is provided on the top of the metal box 2. More specifically, the positioning element 27 mates with the notch of the circuit board 3.

[0046] like Figure 5 and Figure 6 In Example 3, the flow channel has an even number of flow sections 24, and the two connectors 21 are distributed on the same side of the housing 22. Figure 5 The left side; the connecting component 5 of circuit board 3 is located on the opposite side, i.e., the right side. This facilitates wiring and further enables the separation of water and electricity.

[0047] In addition, to ensure electrical safety, the inner and outer sides of the resistor 32 on the circuit board 3 can be covered with an insulating layer.

[0048] The resistor 32 includes a plurality of laterally extending resistor pieces 33, and adjacent resistor pieces 33 are connected by a connecting part 34. Specifically, the resistor pieces 33 are disposed opposite to the flow section 24, that is, the resistor pieces 33 are disposed on the upper side of the flow section 24. Figure 5 An even number of resistors are shown. Resistor 32 is a single unit.

[0049] like Figure 7 The steam generator of embodiment 4 also includes a housing 7 disposed outside the circuit board 3 and the metal box 2.

[0050] The housing 7 has a bendable mounting piece 75 on its side wall 71. The mounting piece 75 can be bent and pulled out to install it into an external mechanism.

[0051] A thermostat 6, also known as a temperature protector, is installed on the top plate 72 of the housing 7. The detection end of the thermostat 6 extends toward the circuit board 3, that is, the detection end is attached to the circuit board 3.

[0052] The housing 7 can be made of sheet metal. A through hole 74 is provided on one side of the top plate 72, and a snap-fit ​​part 73 is provided on the side wall 71. The top plate 72 and the side wall 71 are fixed by bending the snap-fit ​​part 73.

[0053] Connecting bracket 51 is provided with connecting wires. Specifically, one connecting bracket 51 is connected to the thermostat 6 via a first connecting wire 52. The other connecting bracket 51 is connected to a second connecting wire 53. A portion of the second connecting wire 53 is installed inside the housing 7 to change the direction of the second connecting wire 53. A heat-resistant sleeve 76 is provided on the second connecting wire 53, and the heat-resistant sleeve 76 is clamped between the metal box 2 and the housing 7, ensuring heat dissipation space for the metal box 2.

[0054] The metal box 2 has a melting point between 640-800 degrees Celsius and can be made of aluminum or aluminum alloy. The soldering temperature of the brazing layer is 610-638 degrees Celsius, enabling favorable soldering operations, and the circuit board can withstand long-term operation at 500 degrees Celsius without damage. The steam generator can withstand a long-term operating temperature of 200 degrees Celsius. The connecting components are existing technology and commercially available products can be used; therefore, they will not be described in detail here.

[0055] In its first aspect, this invention uses a circuit board 3 to generate heat, which is then transferred to a metal box 2 via a heat exchange layer 4, heating the fluid within the flow channel 23 to produce hot water or steam, thus improving thermal efficiency. In its second aspect, the connection component 5 of the circuit board and the metal box 2 separate water and electricity, improving electrical safety. An even number of resistors 33 and an even number of flow channels 23 can be used, or an odd number of resistors 33 and an odd number of flow channels 23 can be used. In its third aspect, the steam generator is fixed by a housing 7, while retaining sufficient space for heat dissipation. In its fourth aspect, based on the efficient heat exchange and resistance design, the steam generator can be miniaturized or micro-sized, and is easy to install.

[0056] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A steam generator, characterized by, It includes a metal box (2) and a circuit board (3); the circuit board (3) is mounted on one side of the metal box (2) through a heat exchange layer (4); A resistor (32) is provided on the circuit board (3); a flow channel (23) is provided inside the metal box (2).

2. The steam generator of claim 1, wherein The heat exchange layer (4) includes a brazing layer; The circuit board (3) is a printed circuit board.

3. The steam generator of claim 1, wherein, At least two sets of connection components (5) are provided on the circuit board (3), and the two ends of the resistor (32) are respectively connected to a set of connection components (5); The flow channel (23) is provided with connectors (21) at both ends.

4. The steam generator according to claim 1, characterized in that, At least one transversely arranged flow segment (24) is provided at intervals within the flow channel (23); The two adjacent flow segments (24) are connected.

5. The steam generator according to claim 4, characterized in that, The flow channel (23) is provided with an odd number of flow sections (24).

6. The steam generator according to claim 4, characterized in that, An even number of flow segments (24) are provided in the flow channel (23).

7. The steam generator according to claim 4, characterized in that, The resistor (32) includes a plurality of laterally extending resistor pieces (33), and two adjacent resistor pieces (33) are connected by a connecting part (34); The resistor (33) is disposed on the upper side of the flow section (24).

8. The steam generator according to claim 1, characterized in that, The metal box (2) has at least one positioning element (27) that cooperates with the circuit board (3) on one side.

9. The steam generator according to claim 1, characterized in that, It also includes a housing (7) disposed on the outside of the circuit board (3) and the metal box (2).

10. The steam generator according to claim 9, characterized in that, A bendable mounting piece (75) is provided on the side wall (71) of the housing (7); A temperature controller (6) is installed on the top plate (72) of the housing (7); the detection end of the temperature controller (6) is attached to the circuit board (3); A through hole (74) is provided on one side of the top plate (72), and a snap-fit ​​part (73) is provided on the side wall (71). The snap-fit ​​part (73) is bent to fix the top plate (72) on the side wall (71); One end of the resistor (32) is connected to the thermostat (6) via a first connecting line (52); the other end of the resistor (32) is connected to a second connecting line (53); a heat-resistant sleeve (76) is provided on the second connecting line (53), and the heat-resistant sleeve (76) is clamped between the metal box (2) and the shell (7).

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