Dry-burning-resistant water dispenser heater adopting low-voltage control

Abstract

The utility model belongs to the field of electric heating, and particularly relates to an anti-dry-burning water dispenser heater adopting low-voltage control, an anti-dry-burning assembly comprises a PTC (Positive Temperature Coefficient) heating sheet tightly attached to a thick film heating assembly, a low-voltage power supply connected with the PTC heating sheet, a detection resistor connected with the PTC heating sheet and a voltage acquisition module, the voltage acquisition module is used for measuring the voltage at the two ends of the detection resistor, the switch assembly is connected to a power supply circuit of the thick film heating assembly, and the controller is connected with the voltage acquisition module and the switch assembly; the controller is used for controlling the switch-on or switch-off of the switch assembly according to a voltage signal fed back by the voltage acquisition module; the utility model designs the anti-dry-burning water dispenser heater adopting low-voltage control, which is higher in sensitivity and has a better anti-dry-burning effect.

Description

Technical Field

[0001] The utility model belongs to the field of electric heating, and particularly relates to a dry - burning prevention water dispenser heater controlled by low voltage. Background Art

[0002] With the improvement of people's living standards and the increasing demand for healthy drinking water, water dispensers, as a convenient drinking device, have been widely used in families, offices and public places. There are some obvious deficiencies in the traditional design: 1. Uneven heating; 2. Insufficient dry - burning protection design. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the utility model designs a dry - burning prevention water dispenser heater controlled by low voltage, which has higher sensitivity and better dry - burning prevention effect.

[0004] The technical solution of the utility model is as follows:

[0005] A dry - burning prevention water dispenser heater controlled by low voltage, which comprises a tubular carrier, a thick - film heating component is arranged on the surface of the carrier, an upper end cover and a lower end cover are respectively arranged at both ends of the carrier, and an outer shell body sleeved on the carrier and fixedly connected with the upper end cover and the lower end cover. It also includes a dry - burning prevention component. The dry - burning prevention component includes a PTC heating sheet closely attached to the thick - film heating component, and a low - voltage power supply connected to the PTC heating sheet. It also includes a detection resistor connected to the PTC heating sheet, and a voltage acquisition module for measuring the voltage across the detection resistor. It also includes a controller and a switch component. The switch component is connected to the power supply circuit of the thick - film heating component. The controller is connected to the voltage acquisition module and the switch component. The controller controls the on - off of the switch component according to the voltage signal fed back by the voltage acquisition module.

[0006] Furthermore, at least one temperature controller is fixedly arranged on the outer shell body. The surface of the temperature controller is closely attached to the surface of the thick - film heating component, and the temperature controller is connected in series with the thick - film heating component.

[0007] Furthermore, the thick - film heating component includes a first heating thick - film and a second heating thick - film arranged at intervals in an S - shape. The first heating thick - film and the second heating thick - film are arranged at intervals along the length direction of the carrier, and the first heating thick - film and the second heating thick - film share a positive electrode. The switch component is connected to the positive - electrode line of the thick - film heating component.

[0008] Furthermore, the upper end cover includes an upper end cover plate. A lower sleeve is provided at the center of the lower end face of the upper end cover plate. A coaxial second lower sleeve is provided on the periphery of the lower sleeve. A sealing rubber ring is provided between the lower sleeve and the second lower sleeve. The sealing rubber ring is provided with an embedding groove. The end of the carrier is inserted and fitted in the embedding groove. An upper sleeve is provided at the center of the upper end face of the upper end cover. The upper sleeve is communicated with the lower sleeve. A water outlet pipe is provided on the side wall of the upper sleeve. Connecting holes are provided at the four corners of the upper end cover plate.

[0009] Furthermore, a groove is provided inside the second lower sleeve. A convex portion matched with the groove is provided on the corresponding sealing rubber ring.

[0010] Furthermore, four reinforcing rib plates are evenly distributed on the outer peripheral surface of the second lower sleeve.

[0011] Furthermore, an NTC sensor is provided at the end of the upper sleeve.

[0012] Furthermore, the lower end cover includes a lower end cover plate. A first lower sleeve with a sealed lower end is provided at the center of the lower end face of the lower end cover plate. The water inlet pipe is provided on the side of the first lower sleeve. A first upper sleeve is provided on the upper end face of the lower end cover plate. The first upper sleeve is communicated with the first lower sleeve. A second upper sleeve coaxially arranged with the first upper sleeve is further included. A sealing rubber ring is provided between the first upper sleeve and the second upper sleeve. The sealing rubber ring is provided with an embedding groove. The end of the carrier is inserted and fitted in the embedding groove.

[0013] Furthermore, a flow guiding rod is further provided inside the carrier. Both ends of the flow guiding rod are tapered. Spiral blades are provided on the surface of the flow guiding rod. A plurality of support blocks are respectively provided at both ends of the flow guiding rod. The support blocks are connected with the upper end cover and the lower end cover.

[0014] In summary, the present utility model has the following beneficial effects:

[0015] The present utility model improves the method for preventing dry burning of the water dispenser heater. The present utility model judges the dry burning of the heater through an independent detection system, and then controls whether the thick film heating component continues to work. The detection system and the thick film heating system are relatively independent and there is no problem of mutual interference, overcoming the interference situation existing in the prior art when the PTC heating sheet is connected in series with the thick film heating component. At the same time, the present utility model controls the detection system through a controller, with a faster and more accurate response, improving the accuracy and reliability of the dry burning prevention detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0017] Figure 2 is a half-section three-dimensional schematic diagram of the present utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of the upper end cover and the carrier of the present utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the lower end cover of the present utility model;

[0020] Figure 5 This is a connection schematic diagram of the dry-burning prevention component and the thick-film heating component of the present utility model;

[0021] In the figure, 1 is the carrier,

[0022] 2 is the thick-film heating component, 20 is the first heating thick film, 21 is the second heating thick film,

[0023] 3 is the upper end cover, 30 is the upper end cover plate, 31 is the lower sleeve, 32 is the second lower sleeve, 320 is the groove, 33 is the sealing rubber ring, 330 is the embedding groove, 331 is the convex part, 34 is the upper sleeve, 340 is the water outlet pipe, 35 is the connection hole, 321 is the reinforcing rib plate, 341 is the NTC sensor,

[0024] 4 is the lower end cover, 40 is the lower end cover plate, 41 is the first lower sleeve, 410 is the water inlet pipe, 42 is the first upper sleeve, 43 is the second upper sleeve, 44 is the sealing rubber ring, 440 is the embedding groove, 45 is the connection hole,

[0025] 5 is the outer shell, 50 is the thermostat,

[0026] 6 is the flow guide rod, 60 is the spiral blade, 61 is the support block.

[0027] 7 is the dry-burning prevention component, 70 is the PTC heating sheet, 71 is the low-voltage power supply, 72 is the detection resistor, 73 is the voltage acquisition module, 74 is the controller, 75 is the switch component. Detailed implementation manners

[0028] The following further illustrates the present invention in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the embodiments cited do not limit the present invention.

[0029] It should be noted that when an element is referred to as being "disposed on" or "fixed to" another element, it can be directly on the other element or there can be an intermediate element. When an element is referred to as being "fixed to" another element or "fixedly connected" to another element, the connection between them can be a detachable fixing method or a non-detachable fixing method. When an element is considered to be "connected" or "rotatably connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions are only for the purpose of illustration and do not represent the only implementation.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] The terms such as "first", "second", "third", etc. used in the present invention do not represent specific quantities and orders, but are only used for name distinction.

[0032] See Figure 1 and Figure 5 As shown, a dry-burning prevention water dispenser heater controlled by low voltage includes a tubular carrier 1. A thick film heating component 2 is provided on the surface of the carrier 1. Upper end caps 3 and lower end caps 4 are respectively provided at both ends of the carrier 1, and a housing 5 sleeved on the carrier 1 and fixedly connected to the upper end cap 3 and the lower end cap 4. It also includes a dry-burning prevention component 7. The dry-burning prevention component 7 includes a PTC heating sheet 70 closely attached to the thick film heating component, a low voltage power supply 71 connected to the PTC heating sheet, a detection resistor 72 connected to the PTC heating sheet, a voltage acquisition module 73 for measuring the voltage across the detection resistor, a controller 74 and a switch component 75. The switch component 75 is connected in the power supply circuit of the thick film heating component. Specifically, the switch component is a switch that can be controlled by an external signal. When the switch component is turned on, the thick film heating component is powered on to work. When the switch component is turned off, the thick film heating component loses power and does not work. The controller 74 is connected to the voltage acquisition module and the switch component. The controller controls the on or off of the switch component according to the voltage signal fed back by the voltage acquisition module.

[0033] The present utility model improves the anti-dry burning method of the water dispenser heater. The present utility model judges the dry burning of the heater through an independent detection system, and then controls whether the thick film heating component continues to work. The detection system and the thick film heating system are relatively independent and there is no problem of mutual interference, overcoming the interference situation existing in the prior art when the PTC heating sheet is connected in series with the thick film heating component. At the same time, the present utility model controls the detection system through a controller, with faster and more accurate response, improving the accuracy and reliability of anti-dry burning detection.

[0034] Furthermore, at least one thermostat 50 is also fixed on the outer shell 5. In the present utility model, there are two thermostats on the outer shell. The surface of the thermostat is in close contact with the surface of the thick film heating component. The thermostat and the thick film heating component are connected in series. Since the thick film heating component of the present utility model uses two-way heating, the two thermostats respectively detect the temperature of one of the ways.

[0035] Furthermore, referring to Figure 3 As shown, the thick film heating component 2 includes a first heating thick film 20 and a second heating thick film 21 arranged at intervals in an S shape. The first heating thick film 20 and the second heating thick film 21 are arranged at intervals along the length direction of the carrier, and the first heating thick film and the second heating thick film share a common positive electrode. The thick film heating component of the present utility model is set in two gears. When using the first gear, only the first heating thick film is turned on. When using the second gear, the first heating thick film and the second heating thick film are connected at the same time. And the first heating thick film and the second heating thick film of the present utility model are arranged along the length direction of the carrier. When different gears are selected, the designer can completely heat the flowing process of water in the carrier along the length direction, overcoming the problems of short heating distance and poor heating effect existing in the prior art when using the winding method.

[0036] Referring to Figure 2 As shown, the upper end cover 3 includes an upper end cover plate 30. A lower sleeve 31 is provided at the center of the lower end surface of the upper end cover plate 30. A coaxial second lower sleeve 32 is provided outside the lower sleeve 31. A sealing rubber ring 33 is provided between the lower sleeve 31 and the second lower sleeve 32. The sealing rubber ring 33 is provided with an embedding groove 330. The end of the carrier 1 is inserted and fitted in the embedding groove 330. An upper sleeve 34 is provided at the center of the upper end surface of the upper end cover 3. The upper sleeve 34 is communicated with the lower sleeve 31. A water outlet pipe 340 is provided on the side wall of the upper sleeve 34. Connection holes 35 are provided at the four corners of the upper end cover plate. The structure of the upper end cover is defined here, which is convenient for the assembly between the upper end cover and the carrier and also ensures the sealing effect between the two.

[0037] A groove 320 is provided inside the second lower casing 32 described above. A convex portion 331 that mates with the groove is provided on the corresponding sealing rubber ring 33. The cooperation between the convex portion and the groove plays a limiting role to prevent the sealing ring from rotating between the lower casing and the second lower casing.

[0038] Four reinforcing rib plates 321 are evenly distributed on the outer peripheral surface of the second lower casing 32. The setting of the reinforcing rib plates improves the structural strength of the upper end cover. At the same time, during the assembly with the outer casing, it also provides a positioning to prevent assembly errors by the staff.

[0039] An NTC sensor 341 is provided at the end of the upper casing 34 described above. The provided NTC sensor is used to detect the liquid temperature to further ensure that the device will not be in a dry-burning state.

[0040] See Figure 2 and Figure 4 As shown, the lower end cover 4 includes a lower end cover plate 40. A first lower casing 41 for lower end sealing is provided at the center of the lower end surface of the lower end cover plate 40. The water inlet pipe 410 is provided on the side of the first lower casing 41. A first upper casing 42 is provided on the upper end surface of the lower end cover plate 40, and the first upper casing 42 communicates with the first lower casing 41. It also includes a second upper casing 43 coaxially arranged with the first upper casing 42. A sealing rubber ring 44 is provided between the first upper casing 42 and the second upper casing 43. The sealing rubber ring 44 is provided with an embedding groove 440. The end of the carrier 1 is inserted and fitted into the embedding groove. Connection holes 45 are provided at the four corners of the lower end cover.

[0041] A diversion rod 6 is further provided inside the carrier 1 described above. Both ends of the diversion rod 6 are tapered. With this tapered structural design, the water flow is diverted to reduce the impact force of the water flow entering the carrier on the diversion rod. A spiral blade 60 is provided on the surface of the diversion rod 6. The provided spiral blade forms a spiral diversion area between the diversion rod and the inner wall of the carrier. The water flow spirally advances along the diversion area inside the carrier, increasing the travel of the liquid inside the carrier and enhancing the contact time between the liquid and the thick film heating component, thereby ensuring the heating effect of the heating pipe of the water dispenser. Multiple support blocks are respectively provided at both ends of the diversion rod. Specifically, in this embodiment, four support blocks are provided. The support blocks are connected to the upper end cover and the lower end cover, and the four support blocks are evenly distributed at 90 degrees, ensuring the reliability of the fixation of the diversion rod inside the carrier.

[0042] In summary, the present utility model has the following beneficial effects:

[0043] The present utility model improves the anti-dry burning method of the water dispenser heater. The present utility model judges the dry burning of the heater through an independent detection system, and then controls whether the thick film heating component continues to work. The detection system and the thick film heating system are relatively independent and there is no problem of mutual interference, overcoming the interference situation existing in the prior art when the PTC heating sheet is connected in series with the thick film heating component. At the same time, the present utility model controls the detection system through a controller, with faster and more accurate response, improving the accuracy and reliability of anti-dry burning detection.

[0044] Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

Claims

1. A low-pressure controlled anti-dry-burn water dispenser heater, comprising a tubular carrier, a thick film heating component is provided on the surface of the carrier, an upper end cover and a lower end cover are provided at both ends of the carrier, and an outer shell is sleeved on the carrier and fixedly connected to the upper end cover and the lower end cover, characterized in that: It also includes an anti-dry-burning component, which includes a PTC heating sheet tightly attached to the thick film heating component, and a low-voltage power supply connected to the PTC heating sheet, a detection resistor connected to the PTC heating sheet, and a voltage acquisition module, which is used to measure the voltage across the detection resistor, a controller and a switch component, which is connected to the power supply circuit of the thick film heating component, the controller is connected to the voltage acquisition module and to the switch component, and the controller controls the connection or disconnection of the switch component according to the voltage signal fed back by the voltage acquisition module.

2. The anti-dry-burn water dispenser heater using low-voltage control according to claim 1, characterized in that: At least one temperature controller is fixed on the outer shell, the surface of the temperature controller is in close contact with the surface of the thick film heating component, and the temperature controller and the thick film heating component are connected in series.

3. The anti-dry-burn water dispenser heater using low-voltage control according to claim 1, characterized in that: The thick film heating component comprises a first heating thick film and a second heating thick film arranged in an S-shaped interval. The first heating thick film and the second heating thick film are arranged in an S-shaped interval along the length direction of the carrier, and the first heating thick film and the second heating thick film share a positive electrode. The switch component is connected to the positive electrode circuit of the thick film heating component.

4. The anti-dry-burn water dispenser heater using low-voltage control according to claim 1, characterized in that: The upper end cover includes an upper end cover plate, a lower sleeve is provided at the center of the lower end surface of the upper end cover plate, a coaxial second lower sleeve is provided on the periphery of the lower sleeve, a sealing rubber ring is provided between the lower sleeve and the second lower sleeve, the sealing rubber ring is provided with an embedding groove, the end of the carrier is inserted and fitted in the embedding groove, an upper sleeve is provided at the center of the upper end surface of the upper end cover, the upper sleeve is connected with the lower sleeve, a water outlet pipe is provided on the side wall of the upper sleeve, and connecting holes are provided at the four corners of the upper end cover plate.

5. The anti-dry-burn water dispenser heater using low-voltage control according to claim 4, characterized in that: The second lower sleeve is provided with a groove inside, and the corresponding sealing rubber ring is provided with a protrusion matched with the groove.

6. A low-voltage controlled anti-dry-burn water dispenser heater according to claim 4 or 5, characterized in that: Four reinforcing rib plates are evenly distributed on the outer circumferential surface of the second lower casing.

7. The anti-dry-burn water dispenser heater using low-voltage control according to claim 4, characterized in that: The end of the upper sleeve is provided with an NTC sensor.

8. The anti-dry-burn water dispenser heater using low-voltage control according to claim 1, characterized in that: The lower end cover includes a lower end cover plate, a first lower sleeve with a lower end seal is provided at the center of the lower end surface of the lower end cover plate, a water inlet pipe is provided on the side of the first lower sleeve, a first upper sleeve is provided on the upper end surface of the lower end cover plate, and the first upper sleeve is connected to the first lower sleeve, and also includes a second upper sleeve coaxially arranged with the first upper sleeve, a sealing rubber ring is provided between the first upper sleeve and the second upper sleeve, the sealing rubber ring is provided with an embedding groove, and the end of the carrier is inserted and fitted in the embedding groove.

9. The anti-dry-burn water dispenser heater using low-voltage control according to claim 1, characterized in that: A guide rod is also provided inside the carrier, and the two ends of the guide rod are tapered. The surface of the guide rod is provided with spiral blades. The two ends of the guide rod are respectively provided with a plurality of support blocks, and the support blocks are connected to the upper end cover and the lower end cover.

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