PTC steam generator

Abstract

The utility model provides a PTC (Positive Temperature Coefficient) steam generator, which comprises a PTC heating core, one end of the PTC heating core is connected with a power cable, the other end of the PTC heating core penetrates into a shell, a sealing ring and a support are respectively inserted into two ends of the PTC heating core, and the support and the shell are connected into a whole through a fixing structure. The shell, the PTC heating core, the support and the sealing ring form a sealed cavity, a water inlet is formed in one end face of the shell, and a plurality of steam outlet holes are formed in the other end face, away from the water inlet, of the shell. Compared with the prior art, the steam generator has the advantages that the PTC heating element with the automatic temperature control characteristic is adopted in the steam generator, heat can be rapidly generated, steam can be generated, and automatic temperature control is safe and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to physical field, especially heating device, concretely a kind of PTC steam generator BACKGROUND

[0002] The utility model relates to a kind of PTC steam generator.

[0003] PTC heater is widely used in various projects needing heating due to constant temperature self-regulation and dry burning resistance.

[0004] In addition to being used for air or liquid heating, PTC heater can also be applied to household appliances with high-temperature sterilization and disinfection, such as humidifiers, robotic vacuum cleaners, steam mops, washing and ironing products. However, most of these products currently use traditional electric heating wires, electric heating tubes or electromagnetic steam generators, which often have the disadvantages of large size, slow heating speed and uncontrollable temperature. UTILITY MODEL CONTENTS

[0005] To solve the above problems, the utility model provides a kind of PTC steam generator, and is committed to improving product performance. The utility model provides the following technical scheme:

[0006] A kind of PTC steam generator, including a PTC heating core, PTC heating core one end is connected with power cable, the other end is inserted into a shell, in the both ends of PTC heating core each insert a sealing ring and support, support is connected with shell by fixed structure and is integrated, shell, PTC heating core and support, sealing ring form a sealed chamber, one end surface of shell is equipped with water inlet, in the other end surface of shell away from water inlet is equipped with multiple steam outlet holes.

[0007] Further, the PTC heating core is provided with a power connection end electrode sheet, and the other power connection end is an aluminum pipe.

[0008] Further, the electrode sheet and the insulating layer in the PTC heating core are arranged at the gas outlet hole end of the shell.

[0009] Further, an upper isolation rib is arranged on the upper surface of the aluminum pipe close to the water inlet side to isolate the entering liquid in the steam generation area, and a lower isolation rib is arranged on the lower surface of the aluminum pipe close to the steam outlet side, which cooperates with the groove in the inner wall of the shell to isolate the small amount of overflow water to prevent the water from flowing out directly from the steam outlet hole.

[0010] Further, an isolation rib strip A is arranged on one side of the shell, and the shape of the isolation rib strip A matches the side wall of the aluminum pipe to isolate most of the liquid in the steam generation area.

[0011] Further, an isolation rib B is arranged on the inner side wall of the steam outlet hole of the shell, steam drops are isolated in the PTC heater, and the steam drops are prevented from flowing out of the steam outlet hole.

[0012] Further, a bracket groove is arranged on each of the left, right, upper and lower brackets, the width of the bracket groove matches the width of the shell connecting block, a wedge-shaped protrusion is arranged at the middle position of the bottom of the left and right bracket grooves, when the shell connecting block is inserted into the bracket groove, the wedge-shaped protrusion is just clamped into the square hole of the shell connecting block, a circular protrusion is arranged at the middle position of the bottom of the upper and lower bracket grooves, when the shell connecting block is inserted into the bracket groove, the circular protrusion is clamped into the circular hole of the shell connecting block, the height of the circular protrusion protrudes from the outer surface of the shell, after assembly, the circular protrusion is fixed and connected with the bracket and the shell by using a hot riveting process.

[0013] Further, the PTC heating core is connected with a temperature controller and is arranged in the shell, when the temperature is higher than the preset opening threshold of the temperature controller, the temperature controller is opened, when the temperature drops to the preset closing threshold of the temperature controller, the temperature controller is closed, and the product continues to work.

[0014] Further, the steam outlet hole of the shell can adopt any one of a plurality of circular small holes or a narrow rectangular shape as an outlet mode.

[0015] Further, the shell and the bracket are both made of high-temperature-resistant plastic materials and are injection molded.

[0016] Compared with the prior art, the PTC heating element with the self-temperature control characteristic is adopted in the steam generator, steam can be rapidly generated, and the self-temperature control is safe and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced, and obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0018] Fig. 1 It is a PTC steam generator schematic diagram

[0019] Fig. 2 It is a PTC steam generator explosion schematic diagram

[0020] Fig. 3 It is a PTC steam generator cross-sectional schematic diagram

[0021] 1 - housing; 101 - inlet; 102 - steam outlet; 103 - spacer rib A; 104 - housing inner recess; 105 - spacer rib B; 106 - housing connecting block; 2 - sealing ring; 3 - bracket; 301 - bracket recess; 302A - circular protrusion; 302B - wedge-shaped protrusion; 4 - PTC heating core; 401 - aluminum tube; 4011 - upper spacer rib; 4012 - lower spacer rib; 402 - PTC element; 403 - insulation film; 404 - electrode sheet; 5 - power cable; 6 - temperature controller; 7 - steam main generation area; DETAILED DESCRIPTION

[0022] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. The same reference numbers in the drawings indicate the same or similar elements throughout the several aspects. Although various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically noted.

[0023] It should be understood that the terms "inner", "outer", "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] The design will be further described below in conjunction with the structural description of the drawings.

[0025] As Figs. 1-3 A PTC steam generator includes a PTC heating core 4, one end of which is connected to a power cable 5, and the other end of which penetrates into a housing 1. A sealing ring 2 and a bracket 3 are inserted into both ends of the PTC heating core 4. The bracket 3 is connected to the housing 1 by a fixing structure to form an integral whole. The housing 1, the PTC heating core 4, the bracket 3, and the sealing ring 4 form a sealed chamber. One end surface of the housing 1 is provided with a water inlet 101, and the other end surface of the housing 1 away from the water inlet is provided with a plurality of steam outlets 102.

[0026] The PTC heating core 4 described above differs from the PTC heating core of the prior art in the number of metal electrode sheets used. The PTC heating core of the prior art generally places a PTC heating element between two metal electrode sheets, then wraps an insulation layer outside, and finally inserts it into an aluminum tube to heat and solidify it into a whole PTC heating core. This scheme provides only one electrode sheet 404, and the other electrode utilizes the aluminum tube 401 to connect the external power supply. The cable 5 is directly welded or riveted on the aluminum tube 401. Since the aluminum tube 401 is entirely located in the plastic housing 1 and the plastic bracket 2, the overall housing of the product is not electrified. The structure is simplified, and the safety and reliability of the product are also ensured.

[0027] Further, in order to improve the temperature of the steam main generating area 7, the electrode sheet 404 and the insulating layer 403 are arranged at the end of the shell air outlet hole 102, so that the temperature of the upper end of the steam main generating area 7 is slightly higher, the PTC heating core 402 is in direct contact with the aluminum pipe 401, and the loss of intermediate heat transfer is reduced.

[0028] The upper isolation rib 4011 is arranged on the upper plane of the PTC heating core aluminum pipe 401 close to the water inlet side, so as to isolate the entering liquid in the steam generating area. The lower isolation rib 4012 is arranged on the lower plane of the aluminum pipe 401 close to the steam air outlet hole 102 side of the shell 1, which cooperates with the groove 104 in the inner wall of the shell 1. The main function is to isolate a small amount of overflow water, prevent water from flowing out directly from the steam air outlet hole, and cause the product to drip water. Secondly, the lower isolation rib 4012 also has the function of supporting and fixing the aluminum pipe 401.

[0029] An isolation rib strip A 103 is arranged on one side of the inner wall of the shell 1, the shape of the isolation rib strip A 103 matches the side wall of the aluminum pipe 401, and most of the liquid is isolated in the steam generating area 7. The other function of the isolation rib strip 103 is to support the aluminum pipe.

[0030] An isolation rib B 105 is arranged on the inner wall of the steam air outlet hole 102 of the shell 1, so as to isolate the steam water droplets in the PTC heater and prevent the water droplets from flowing out of the steam air outlet hole 102.

[0031] The bracket 3 is provided with a bracket groove 301 on the left, right, top and bottom, the width of the bracket groove 301 matches the width of the shell 1 connecting block 106, the bottom of the left and right bracket grooves 301 is provided with a wedge-shaped protrusion 302B, when the shell connecting block 106 is inserted into the groove 301, the wedge-shaped protrusion 302B is just clamped into the square hole 106B of the shell connecting block, the bottom of the top and bottom bracket grooves 301 is provided with a circular protrusion 302A, when the shell connecting block 106 is inserted into the bracket groove 301, the circular protrusion 302A is clamped into the circular hole 106A of the shell connecting block, the height of the circular protrusion 302A protrudes from the outer surface of the shell 1, after assembly, the circular protrusion 302A is fixed and connected with the bracket 3 and the shell 1 by using hot riveting process.

[0032] Further, in order to control the temperature, the PTC heating core 4 is connected with a temperature controller 6 and arranged in the shell 1. When the temperature is higher than the preset disconnection threshold of the temperature controller 6, the temperature controller 6 is disconnected, so as to avoid high temperature damage to the shell 1 and ensure use safety. When the temperature drops to the preset closing threshold of the temperature controller 6, the temperature controller 6 is closed, and the product continues to work.

[0033] Further, the steam air outlet hole 102 of the shell can adopt any one of a plurality of circular small holes or a narrow rectangular shape as the air outlet mode.

[0034] Further, the shell 1 and the support 3 are both made of high-temperature-resistant plastic material by injection molding.

[0035] Embodiments of the application have been described above, with the understanding that these descriptions are exemplary only, and are not intended to be exhaustive or to limit the scope of the embodiments disclosed. Many modifications and variations are possible in light of the above teachings. It is contemplated that the use of the terms "including," "comprising," "having," "containing," or "including" and variations thereof, are intended to be equivalent to the term "consisting of" or "consisting of." The use of the term "about" in relation to a geographic location is intended to mean within 10% of the stated geographic location. The use of the term "about" in relation to a numerical value is intended to mean within 10% of the stated numerical value. The use of the term "about" in relation to a numerical value is intended to mean within 10% of the stated numerical value. The use of the term "about" in relation to a numerical value is intended to mean within 10% of the stated numerical value. The use of the term "about" in relation to a numerical value is intended to mean within 10% of the stated numerical value. The use of the term "about" in relation to a numerical value is intended to mean within 10% of the stated numerical value. The use of the term "about" in relation to a numerical value is intended to mean

Claims

1. A PTC steam generator, characterized in that: It includes a PTC heating element (4), one end of which is connected to a power cable (5), and the other end is inserted into a housing (1). A sealing ring (2) and a bracket (3) are inserted into each end of the PTC heating element (4). The bracket (3) and the housing (1) are connected as one unit by a fixing structure. The housing (1), the PTC heating element (4), the bracket (3), and the sealing ring (2) form a sealed chamber. One end face of the housing (1) is provided with a water inlet (101), and the other end face of the housing (1) away from the water inlet is provided with multiple steam vents (102).

2. A PTC steam generator according to claim 1, characterized in that: The PTC heating core (4) has one power connection electrode plate (404) and another power connection aluminum tube (401).

3. A PTC steam generator according to claim 2, characterized in that: The electrode sheet (404) and the insulating layer (403) in the PTC heating core are placed at the air outlet (102) end of the outer shell (1).

4. A PTC steam generator according to claim 3, characterized in that: An upper isolation rib (4011) is provided on the upper surface of the PTC heating core aluminum tube (401) near the water inlet (101) to isolate the incoming liquid in the steam generation area. A lower isolation rib (4012) is provided on the lower surface of the aluminum tube (401) near the steam outlet (102), which cooperates with the groove (104) on the inner wall of the outer shell (1) to isolate a small amount of overflowing water and prevent water from flowing directly out of the steam outlet (102).

5. A PTC steam generator according to claim 4, characterized in that: An isolation rib A (103) is provided on the inner wall of one side of the outer shell (1). The shape of the isolation rib A (103) matches the side wall of the aluminum tube (401) to isolate most of the liquid in the steam generation area.

6. A PTC steam generator according to claim 5, characterized in that: An isolation rib B (105) is provided on the inner wall of the steam outlet (102) of the outer shell (1) to isolate the steam water droplets inside the PTC heater and prevent the water droplets from flowing out of the steam outlet (102).

7. A PTC steam generator according to claim 6, characterized in that: The bracket (3) is provided with a bracket groove (301) on the left, right, top and bottom. The width of the bracket groove (301) matches the width of the outer shell connecting block (106). A wedge-shaped protrusion (302B) is provided at the middle position of the bottom of the left and right bracket grooves (301). When the outer shell connecting block (106) is inserted into the bracket groove (301), the wedge-shaped protrusion (302B) fits into the square hole (106B) of the outer shell connecting block. A circular protrusion (302A) is provided at the middle position of the bottom of the top and bottom bracket grooves (301). When the outer shell connecting block (106) is inserted into the bracket groove (301), the circular protrusion (302A) fits into the circular hole (106A) of the outer shell connecting block. The circular protrusion (302A) protrudes from the outer surface of the outer shell (1). After assembly, the circular protrusion (302A) is fixedly connected to the bracket (3) and the outer shell (1) by hot riveting process.

8. A PTC steam generator according to any one of claims 1 to 7, characterized in that: The PTC heating element (4) is connected in series with a thermostat (6) and installed inside the housing (1). When the temperature is higher than the preset disconnection threshold of the thermostat (6), the thermostat (6) disconnects. When the temperature drops to the preset closing threshold of the thermostat (6), the thermostat (6) closes and the product continues to work.

9. A PTC steam generator according to claim 8, characterized in that: The steam vent (102) of the outer casing (1) can be any of the following forms: multiple small circular holes or a narrow rectangle.

10. A PTC steam generator according to claim 9, characterized in that: The outer shell (1) and the bracket (3) are both injection molded from high-temperature resistant plastic materials.

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