Ptc heater for liquid heating or liquid vaporization

Abstract

The utility model discloses a kind of PTC heater for liquid heating or liquid vaporization, the heating main body has heating cavity, inlet pipe and outlet pipe are equipped with in heating main body and communicate with heating cavity, a convex block is equipped in heating cavity, convex block has hollow cavity, heating module is set in hollow cavity, assembly port communicates with hollow cavity, heating module is inserted into convex block from assembly port, outlet pipe is set on the end face away from assembly port, heating module has two heating surfaces, the two end walls of convex block opposite to heating surface form heat-conducting wall, and heating surface is formed in the two wall surfaces exposed to heating cavity, and there is spacing between the cavity wall of convex block and heating cavity. Compared with prior art, heat is conducted to heating surface by convex block and the liquid flowing through heating surface is heated or vaporized, the integration structure of both is realized, hot water and dry steam are formed in one product, and the structure is simple, the production cost is low.

Description

Technical Field

[0001] This utility model relates to a PTC heater, and more particularly to a PTC heater for liquid heating or liquid vaporization. Background Technology

[0002] As consumers demand higher levels of home cleaning effectiveness, cleaning appliances with hot water and steam functions are becoming increasingly popular. Hot water can effectively dissolve grease and improve cleaning efficiency, while high-temperature steam can achieve deep sterilization and mite removal.

[0003] Currently, the technical solutions on the market mainly take the following two forms:

[0004] 1. Split-type heating system: This system consists of a separate liquid heating tank and a steam generator, connected by complex piping and valves. This approach has inherent drawbacks such as large system size, complex structure, significant heat loss, and slow response speed (especially long steam preheating time).

[0005] 2. Simple steam generator: Some products use a single heating chamber to heat the liquid to boiling before outputting steam. This method produces steam with high water content (humid steam) and low dryness, and it also suffers from the problem of "repeatedly boiled water," where water that is not sprayed out in time is repeatedly evaporated, which may produce scale and odor.

[0006] Therefore, there is an urgent need in this field for an integrated heating solution that is compact, has high thermal efficiency, can quickly generate dry steam, and can switch between hot water and steam on demand or work together. Utility Model Content

[0007] The purpose of this invention is to provide a PTC heater for liquid heating or liquid vaporization. The technical problem to be solved is to achieve integrated heating and steam generation with a simple structure.

[0008] To solve the above problems, the present invention adopts the following technical solution: A PTC heater for liquid heating or liquid vaporization includes a heating module and a heating body. The heating module is disposed in the heating body, which has a heating cavity. An inlet pipe and an outlet pipe communicating with the heating cavity are provided on the heating body. A protruding bump is provided in the heating cavity. The bump has a hollow cavity. The heating module is disposed in the hollow cavity. One end of the bump extends to and penetrates the corresponding end face of the heating body to form an assembly port. The assembly port communicates with the hollow cavity. The heating module is inserted into the bump through the assembly port. The outlet pipe is disposed on the end face away from the assembly port. The inlet pipe and the outlet pipe are disposed on the heating body away from each other. The heating module has two heating surfaces. The two end walls of the bump and the heating surfaces opposite to each other form heat-conducting walls, and the two walls exposed in the heating cavity form heating surfaces. There is a gap between the bump and the cavity wall of the heating cavity so that the liquid entering the heating cavity contacts the heating surface and is heated or vaporized after heating.

[0009] Furthermore, a temperature and electrical control unit is provided on the outer wall of the heating body.

[0010] Furthermore, a detachable electrical control box is provided on the outer wall of the heating body, and the temperature and electrical control unit is located in the electrical control box.

[0011] Furthermore, the electrical control box is provided with an embedding strip, and the outer wall of the heating body is provided with an embedding groove that matches the embedding strip. The electrical control box is inserted into the embedding groove through the embedding strip and fixed to the heating body.

[0012] Furthermore, the temperature and electrical control unit includes at least one of a thermistor, a temperature controller, and a fuse.

[0013] Furthermore, the heating module includes a heating component, a baffle, an insulating baffle, and an insert. The baffle is U-shaped and covers the heating surface of the heating component. The insulating baffle includes a first insulating baffle and a second insulating baffle. The first insulating baffle is U-shaped and covers the baffle. The second insulating baffle is U-shaped and surrounds the three sides of the heating component except for the wire. The insert is disposed in the gap between the hollow cavity and the heating component.

[0014] Furthermore, the heating surface of the protrusion is provided with spaced-apart raised strips.

[0015] Furthermore, the cross-section of the protrusion is rectangular or trapezoidal.

[0016] Furthermore, the longitudinal section of the protrusion is rectangular or trapezoidal.

[0017] Furthermore, the heating body, protrusion, inlet pipe, and outlet pipe are integrally formed.

[0018] Compared with the prior art, this utility model achieves an integrated structure by setting a protrusion in the heating chamber and setting a heating module in the protrusion. The protrusion conducts heat to the heating surface and heats or vaporizes the liquid flowing through the heating surface, realizing the formation of hot water and dry steam in one product. Moreover, the structure is simple and the production cost is low. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of this utility model.

[0020] Figure 2 This is an exploded view of the present invention.

[0021] Figure 3 This is a cross-sectional view of the present invention. Figure 1 .

[0022] Figure 4 This is a cross-sectional view of the present invention. Figure 2 .

[0023] Figure 5 This is a schematic diagram of the water flow direction of this utility model.

[0024] Figure 6 This is a schematic diagram of the heating module of this utility model.

[0025] Figure 7 This is a schematic diagram of the temperature and electrical control unit of this utility model. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 4 As shown, this utility model discloses a PTC heater for liquid heating or liquid vaporization, including a heating body 2 and a heating module 1, wherein:

[0028] The heating body 2 is a one-piece die-cast aluminum alloy shell, which is rectangular in shape. It has two side end faces along its length and four main wall faces. The heating body 2 has a heating cavity 21 that extends through one side end face of the heating body 2. A cover plate 7 is provided on this side end face. The end of the cover plate 7 opposite to the side end face has a circumferential protrusion 71. The protrusion 71 is adapted to the shape of the through hole on the side end face. A sealing ring 72 is provided between the protrusion 71 and the through hole. The cover plate 7 is fastened to the heating body 2 with screws. An outlet pipe 23 is provided on the cover plate 7. A protruding bump 24 is provided in the heating cavity 21. The heating module 1 is disposed in the hollow cavity. One end of the protrusion 24 extends to and through the other end face of the heating body 2 to form an assembly port 255. The assembly port 255 communicates with the hollow cavity. The heating module 1 is inserted into the protrusion 24 through the assembly port 255. The heating module 1 has two heating surfaces. The two end walls of the protrusion 24 opposite to the heating surfaces form heat-conducting walls. Heating surfaces 241 are formed on the two walls exposed in the heating cavity 21. There is a gap between the protrusion 24 and the heating cavity 21 so that the liquid entering the heating cavity 21 contacts the heating surface and is heated or vaporized after heating. The inlet pipe 22 is disposed on the main wall away from the outlet pipe 23.

[0029] like Figures 1 to 4 As shown, the inlet pipe 22 is located on the main wall near the assembly port 255, while the outlet pipe 23 is located on the end of the cover plate 7 away from the inlet pipe 22, so as to achieve sufficient heating of the liquid.

[0030] like Figure 2 As shown, a first connecting ear 73 and a second connecting ear 27 are respectively provided on the cover plate 7 and the heating body 2. The first connecting ear 73 and the second connecting ear 27 are respectively provided with screw holes for fastening by screws.

[0031] from Figure 5 As can be seen, after the liquid enters the heating chamber 21 from the inlet pipe 22, it is guided by the protrusion 24 on the opposite end surface of the inlet pipe 22, so that the liquid flows down from both sides, allowing the liquid to fully contact the heating surface, and finally flows out from the outlet pipe 23.

[0032] like Figure 3 As shown, in this invention, the heating surface of the protrusion 24 is provided with protruding strips 25 that are evenly spaced apart, so that the heating surface has a concave-convex surface, thereby increasing the contact area of ​​the liquid.

[0033] In this invention, the protrusion 24 extends along the length of the heating body 2, and the cross-section of the protrusion 24 is rectangular or trapezoidal. Of course, the longitudinal section of the protrusion 24 can also be rectangular or trapezoidal, thereby guiding the liquid and ensuring that the liquid does not remain in the heating chamber 21 after heating.

[0034] like Figures 1 to 4 as well as Figure 7 As shown, a temperature and electrical control unit 3 is provided on the outer wall of the heating body 2. Preferably, it is located on the main wall surface of the heating body 2 opposite to the heating surface. The temperature and electrical control unit 3 is fixed to the heating body 2 by an electrical control box 8 that can be separated from the heating body 2.

[0035] like Figure 7 As shown, the electrical control box 8 includes a cover plate 82 above a lower cover plate 83 with a box cavity. The upper cover plate 82 and the lower cover plate 83 are made of plastic material. The lower cover plate 83 is connected to the heating body 2. The temperature and electrical control unit 3 is disposed in the box cavity of the lower cover plate 83. An insert strip 81 is provided on the surface of the lower cover plate 81 opposite to the main wall surface of the heating body 2. The two ends of the insert strip 81 have grooves. Figure 2 As shown, an embedding groove 26 is provided on the main wall surface that contacts the lower cover plate 83. The embedding groove 26 has an embedding opening at one end of the main wall surface opposite to the embedding opening 25. The embedding groove 26 is adapted to the embedding strip 81. The upper cover plate 83 and the lower cover plate 82 are sealed together by ultrasonic welding. The lower cover plate 82 is further fixed to the heating body 2 by screw fastening.

[0036] In this utility model, the temperature and electrical control unit 3 includes a thermistor (NTC) 4, a temperature controller 5, and a fuse 6. The lower cover plate 83 has compartments for independently accommodating the thermistor 4, the temperature controller 5, and the fuse 6. The thermistor with overcurrent protection, together with the temperature controller 5 and the fuse 6, forms a double protection line.

[0037] In this invention, the output terminals of the heating module 1 and the temperature and electrical control unit 3 are sealed with glue to achieve an overall protection level of IP65, making it suitable for complex environments such as humid and dusty environments.

[0038] like Figure 7As shown, the heating module 1 includes a heating component 11, a U-shaped baffle 14, an insulating baffle 12, and an insert 13. The insert 13 is disposed in the gap between the hollow cavity of the protrusion 24 and the heating component 11. The insert 13 is used to ensure that the heating surface of the heating component 11 can be in close contact with the two heat-conducting walls of the hollow cavity. The insert is made of a heat-conducting metal material. Specifically, the heating component 11 includes a PTC element 111 and an electrode plate 112 disposed outside the PTC element 111. The baffle 14 is wrapped around the outer surface of the electrode plate 112. The insulating baffle 12 includes a first insulating baffle 121 and a second insulating baffle 122. The first insulating baffle 121 is U-shaped and is wrapped around the baffle 14. The second insulating baffle 122 is U-shaped and surrounds the three sides of the heating component 11 other than the conductor of the electrode plate 112.

[0039] This invention controls the flow rate of the liquid pump in the device (cleaning equipment such as a washer-mop combo machine) to control the flow rate of the liquid entering the heating chamber 21, thereby controlling the heating or vaporization of the liquid.

[0040] This utility model is applicable to cleaning equipment, such as washing and mopping machines, handheld cleaning machines, etc.

[0041] This can be understood as follows: Hot water mode: The liquid pump starts with a water flow rate greater than 50ml / min, a large amount of liquid flows into the heating chamber, is heated by the heating module, and then flows out directly as hot water.

[0042] Steam mode: The liquid pump starts with a water flow rate of less than 10ml / min. A small amount of liquid is quantitatively injected into the heating chamber and instantly heated to above the saturation temperature by the heating module in the chamber (within a few seconds), generating superheated steam with high dryness and then discharged.

[0043] Of course, you can also set a mixed steam and hot water mode: the liquid pump starts with a water flow of 30ml / min, which can first spray high-temperature hot water to dissolve stains, and then spray high-temperature steam for sterilization and disinfection. Alternatively, depending on the cleaning procedure, it can work alternately or in combination to achieve "strong cleaning + sterilization" in one step.

[0044] This utility model features high integration and compact structure: it integrates liquid heating and steam generation functions into a single main body, eliminating complex connecting pipes and external components, significantly reducing volume and lowering material and assembly costs;

[0045] Extremely high thermal efficiency: The heat generated by the PTC is efficiently transferred to the medium, and the overall thermal efficiency can be improved by more than 15%;

[0046] The spaced convex strips on the heating surface increase the heating area, allowing the unit liquid to be completely vaporized instantly, producing dry, fresh 105°C steam, avoiding the problem of "thousand-times-boiled water", and the preheating time is extremely short, achieving "instant use".

[0047] Safe and reliable: Multi-layer protection, with internal insulation material forming leakage protection, and external dual electronic (temperature control fuse over-temperature protection, NTC over-temperature protection) protection measures, combined with the inherent self-limiting temperature characteristics of PTC element (its own resistance increases and power decreases when the temperature is too high), fundamentally improving the safety level of the product.

[0048] Modular design simplifies assembly; it optimizes traditional assembly methods by combining multiple modules, greatly improving work efficiency.

Claims

1. A PTC heater for liquid heating or liquid vaporization, comprising a heating module (1) and a heating body (2), wherein the heating module (1) is disposed in the heating body (2), characterized in that: The heating body (2) has a heating cavity (21). An inlet pipe (22) and an outlet pipe (23) communicating with the heating cavity (21) are provided on the heating body (2). A protruding protrusion (24) is provided in the heating cavity (21). The protrusion (24) has a hollow cavity. The heating module (1) is disposed in the hollow cavity. One end of the protrusion (24) extends to the corresponding end face of the heating body (2) and penetrates the corresponding end face of the heating body (2) to form an assembly port (255). The assembly port (255) communicates with the hollow cavity. The heating module (1) is fed from the assembly port. (255) Insert into the protrusion (24), the outlet pipe (23) is set on the end face away from the assembly port (255), the inlet pipe (22) and the outlet pipe (23) are set on the heating body (2) away from each other, the heating module (1) has two heating surfaces, the protrusion (24) and the two end walls opposite to the heating surfaces form heat-conducting walls, and the two walls exposed in the heating cavity (21) form heating surfaces, there is a gap between the protrusion (24) and the cavity wall of the heating cavity (21) so that the liquid entering the heating cavity (21) contacts the heating surface and is heated or vaporized after heating.

2. The PTC heater for liquid heating or liquid vaporization according to claim 1, characterized in that: The outer wall of the heating body (2) is provided with a temperature and electrical control unit (3).

3. The PTC heater for liquid heating or liquid vaporization according to claim 2, characterized in that: The heating body (2) has a separable electrical control box (8) on its outer wall, and the temperature and electrical control unit (3) is located in the electrical control box (8).

4. The PTC heater for liquid heating or liquid vaporization according to claim 3, characterized in that: The electrical control box (8) is provided with an embedding strip (81), and the outer wall of the heating body (2) is provided with an embedding groove (26) that is compatible with the embedding strip (81). The electrical control box (8) is inserted into the embedding groove (26) through the embedding strip (81) and fixed on the heating body (2).

5. The PTC heater for liquid heating or liquid vaporization according to claim 4, characterized in that: The temperature and electrical control unit (3) includes at least one of a thermistor (4), a temperature controller (5), and a fuse (6).

6. The PTC heater for liquid heating or liquid vaporization according to claim 1, characterized in that: The heating module (1) includes a heating component (11), a baffle (14), an insulating baffle (12), and an insert (13). The baffle (14) is U-shaped and covers the heating surface of the heating component (11). The insulating baffle (12) includes a first insulating baffle (121) and a second insulating baffle (122). The first insulating baffle (121) is U-shaped and covers the baffle (14). The second insulating baffle (122) is U-shaped and surrounds the three sides of the heating component (11) except for the wires. The insert (13) is disposed in the gap between the hollow cavity and the heating component (11).

7. The PTC heater for liquid heating or liquid vaporization according to any one of claims 1-6, characterized in that: The heating surface of the protrusion (24) is provided with spaced protruding strips (25).

8. The PTC heater for liquid heating or liquid vaporization according to claim 7, characterized in that: The cross-section of the protrusion (24) is rectangular or trapezoidal.

9. The PTC heater for liquid heating or liquid vaporization according to claim 7, characterized in that: The longitudinal section of the protrusion (24) is rectangular or trapezoidal.

10. The PTC heater for liquid heating or liquid vaporization according to claim 1, characterized in that: The heating body (2), protrusion (24), inlet pipe (22), and outlet pipe (23) are integrally formed structures.

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