Dry-burning-resistant instant-heating water faucet

Abstract

The anti-dry-burning instant heating faucet comprises a water inlet pipe, a heating device, a Hall switch and a rotor, the water inlet pipe communicates with the heating device, the rotor is arranged in the water inlet pipe, the Hall switch is arranged on a power connection circuit of the heating device, and the Hall switch is turned on when sensing rotation of the rotor. Through the arrangement of the Hall switch and the rotor, the heating device can work only when continuous water flow flows in the water inlet pipe, and once no water flow flows in the water inlet pipe, the power supply current of the heating device is cut off, so that the condition of dry burning is effectively prevented, and the working safety of the instant heating type faucet is improved.

Description

Technical Field

[0001] The present application relates to the technical field of faucets, and in particular to an anti-dry-boiling instant hot water faucet. Background Art

[0002] Instantaneous hot water faucets, also known as electric hot water faucets, are faucets that deliver hot water within 3-5 seconds of being turned on. In recent years, instantaneous hot water faucets have gained widespread adoption due to their ability to dispense both hot and cold water, as well as their ease of installation and simple operation. Existing instantaneous hot water faucets are typically powered on and off by the user triggering a water pressure switch. However, this approach has certain drawbacks: 1. When the user turns off the hot water after using the water, the hot water may not be fully shut off, resulting in an incomplete closure of the valve core. Water can still flow through the gap in the valve core and act on the water pressure switch. Although no water can flow in this situation, as long as the incoming water pressure reaches a certain level, the water pressure switch will be triggered, activating the heating device within the faucet. This can easily lead to dry-boiling. In severe cases, the plastic components within the faucet may deform due to heat, even posing a fire hazard. This poses a significant safety risk and fails to meet safety requirements. 2. When the user is in use, if the operation of quickly switching between hot and cold water is performed, the valve core may not be fully relieved (when in hot water state, the pressure acting on the water pressure switch has no time to be released and it is switched to cold water state. At this time, the water pressure switch is in a closed state all the way and the pressure to start heating is always reached). Or when the water outlet of the instant faucet is connected to some devices with a pressurizing effect (we call it back pressure phenomenon, that is, reverse pressure acts on the water pressure switch), both cold water and hot water will be heated, resulting in the water outlet temperature being too high, and the temperature inside the machine cannot be cooled, causing burns to the user or melting the overheating protector inside the machine and other safety hazards. Utility Model Content

[0003] In order to solve the shortcomings and deficiencies in the above-mentioned prior art, the purpose of this application is to provide an anti-dry-burn instant hot water faucet to effectively improve the working safety of the instant hot water faucet.

[0004] To achieve the above-mentioned purpose, the present application provides an anti-dry-burn instant hot water faucet, comprising a water inlet pipe, a heating device, a Hall switch and a rotor. The water inlet pipe is connected to the heating device, the rotor is arranged in the water inlet pipe, and the Hall switch is arranged in the wiring circuit of the heating device. The Hall switch is turned on when it senses the rotation of the rotor.

[0005] Furthermore, the water inlet pipe includes a first section and a second section that are connected to each other, the second section is connected to the heating device, and the rotor is arranged in the first section and / or the second section.

[0006] Furthermore, the first section is formed by extending from bottom to top.

[0007] Further, the heating device is a cast aluminum heating element.

[0008] Further, a flow regulating valve is provided on the water inlet pipe. The flow regulating valve includes a rotating shaft, and a triggering member is provided on the rotating shaft. The triggering member rotates together with the rotating shaft. A microswitch is provided on the rotation trajectory of the triggering member. The microswitch is also provided on the power connection line of the heating device and is connected in series with the Hall switch.

[0009] Further, the rotation trajectory of the triggering member includes a first region and a second region arranged continuously. One end of the first region away from the second region is the starting position, the connection between the first region and the second region is the first position, one end of the second region away from the first region is the second position, and the microswitch is provided in the second region and is close to the first position.

[0010] Further, the arc length of the triggering member is greater than or equal to the arc length of the second region.

[0011] Further, a guiding inclined surface is provided at one end of the triggering member away from the starting position, and the arc length from the guiding inclined surface to the starting position gradually decreases from top to bottom.

[0012] Further, when the triggering member rotates from the starting position to the first position, the water flow rate flowing from the water inlet pipe to the heating device gradually increases. When the triggering member rotates from the first position to the second position, the water flow rate flowing from the water inlet pipe to the heating device gradually decreases.

[0013] Further, when the triggering member rotates from the second position to the first position, the water flow rate flowing from the water inlet pipe to the heating device gradually increases. When the triggering member rotates from the first position to the starting position, the water flow rate flowing from the water inlet pipe to the heating device gradually decreases.

[0014] Compared with the prior art, the present utility model has the following beneficial technical effects: Through the setting of the Hall switch and the rotor, only when there is continuous water flow in the water inlet pipe can the heating device work. Once there is no water flow in the water inlet pipe, the supply current of the heating device is disconnected, effectively preventing the occurrence of dry burning and improving the working safety of the instant hot water faucet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an anti-dry burning instant hot water faucet according to an embodiment of the present application;

[0016] Figure 2 is Figure 1 the exploded view in

[0017] Figure 3 is Figure 2 the assembly drawing of the medium flow regulating valve and the water inlet pipe;

[0018] Figure 4 is Figure 3 the explosion diagram of;

[0019] Figure 5 the structural schematic diagram of the rotating shaft and the trigger member in an embodiment of the present application;

[0020] Figure 6 the working principle diagram of the heating device in an embodiment of the present application;

[0021] Figure 7 the working principle diagram of the heating device in an embodiment of the present application;

[0022] Figure 8 the schematic diagram of the rotation trajectory of the trigger member in an embodiment of the present application. Detailed implementation manners

[0023] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present application. On the contrary, they are merely examples of the devices consistent with some aspects of the present application as detailed in the appended claims.

[0024] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application should have the ordinary meanings understood by those of ordinary skill in the technical field to which the present utility model belongs. The words such as "a" or "an" used in the specification and claims of the present application do not represent a limitation in quantity, but mean that there is at least one. The words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms of "a", "the" and "said" used in the specification and appended claims of the present application are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0025] Please refer to Figures 1 - 7As shown in the figure, an anti-dry-burning instant hot water faucet includes a water outlet faucet 1, a water inlet pipe 2, a heating device, a microswitch 4, and a flow regulating valve 5. The water inlet pipe 2 is connected to the heating device, and the heating device is connected to the water outlet faucet 1. The flow regulating valve 5 is used to adjust the water flow rate from the water inlet pipe 2 to the heating device. The microswitch 4 is arranged on the power connection line of the heating device and on the rotation track of the flow regulating valve 5. After the flow regulating valve 5 is opened and rotated by a certain angle, the microswitch 4 is triggered by the flow regulating valve 5, causing the heating device to work. The heating device heats the water flowing into it and provides hot water through the water outlet faucet 1.

[0026] In this embodiment, the anti-dry-burning instant hot water faucet is also provided with a Hall switch 6 and a rotor (not shown in the figure). The rotor is arranged in the water inlet pipe 2. The Hall switch 6 is arranged on the power connection line of the heating device and is connected in series with the microswitch 4. When the Hall switch 6 senses the rotation of the rotor, it conducts. That is, when there is water flow in the water inlet pipe 2, the rotor rotates, and the Hall switch 6 conducts. Combined with the triggering of the microswitch 4, the heating device will start heating. Of course, without setting the microswitch 4, the heating of the heating device can also be controlled only by the cooperation between the Hall switch 6 and the rotor. The Hall switch 6 senses the rotation of the rotor and then conducts, which is the same as the prior art and will not be elaborated here.

[0027] When there is no water flow in the water inlet pipe 2, even if there is a certain degree of water pressure in the water inlet pipe 2 and the microswitch 4 is triggered, the heating device will not heat. And in the case of a sudden water cut-off, there is no continuous water flowing into the water inlet pipe 2, and the Hall switch 6 will also disconnect, that is, the power supply current of the heating device is disconnected, and the heating device stops heating, effectively preventing the heating device from dry burning and improving the working safety of the instant hot water faucet.

[0028] The water inlet pipe 2 includes a first section 21 and a second section 22 that are connected and communicate with each other. The second section 22 is connected to the heating device. There is one rotor and one Hall switch 6. Please refer to Figure 6 As shown in the figure, at this time, the rotor can be arranged in the first section 21 or in the second section 22. Of course, there can also be multiple rotors. At this time, there are also multiple Hall switches 6 and they are arranged in one-to-one correspondence with the rotors. The multiple Hall switches 6 are connected in series on the power connection line. Please refer to Figure 7 As shown in the figure, the rotor can be arranged in the first section 21, or in the second section 22, or in both the first section 21 and the second section 22.

[0029] Among them, the first section 21 extends upward. The first section 21 can extend vertically or be inclined upward. In this embodiment, the second section 22 is arranged horizontally, and the flow regulating valve 5 is arranged at the connection between the first section 21 and the second section 22.

[0030] The flow regulating valve 5 includes a valve core, a rotating shaft 51 connected to the valve core, and a housing 52 sleeved on one end of the rotating shaft 51 away from the valve core. The valve core is arranged in the water inlet pipe 2, and the valve core is not visible in the figure. By rotating the housing 52, the rotating shaft 51 and the valve core are driven to rotate, so as to adjust the water flow rate flowing from the water inlet pipe 2 to the heating device. In this embodiment, a trigger 53 is arranged on the rotating shaft 51, and the trigger 53 rotates together with the rotating shaft 51. The micro switch 4 is arranged on the rotation track 7 of the trigger 53.

[0031] In this embodiment, a circular connecting seat 55 is sleeved on the outer periphery of the rotating shaft 51, and the trigger 53 is arc-shaped and protrudes from the outer periphery of the circular connecting seat 55.

[0032] Please refer to Figure 8 As shown, the rotation track 7 of the trigger 53 includes a continuously arranged first area 71 and a second area 72. One end of the first area 71 away from the second area 72 is the starting position 73, the connection point of the first area 71 and the second area 72 is the first position 74, one end of the second area 72 away from the first area 71 is the second position 75. The micro switch 4 is arranged in the second area 72 and is close to the first position 74. When the trigger 53 is located at the starting position 73, one end of the trigger 53 is also located at the starting position 73, the other end of the trigger 53 is located in the first area 71, and a guiding inclined surface 531 is arranged at one end of the trigger 53 away from the starting position 73. The arc length from the guiding inclined surface 531 to the starting position 73 gradually decreases from top to bottom. When the trigger 53 rotates a certain angle and contacts the micro switch 4, the trigger 53 continues to rotate. Under the action of the guiding inclined surface 531, the micro switch 4 is triggered downward by the trigger 53 to realize the conduction of the power connection circuit of the heating device.

[0033] When the trigger member 53 rotates from the starting position 73 to the first position 74, the water flow rate from the water inlet pipe 2 to the heating device gradually increases. At this time, the water flowing out of the water outlet faucet 1 is cold water. When the trigger member 53 rotates from the first position 74 to the second position 75, the water flow rate from the water inlet pipe 2 to the heating device gradually decreases. At this time, the micro switch 4 is triggered by the trigger member 53, and the heating device is in the heating working state. When the heating power of the heating device is constant, when the trigger member 53 rotates from the first position 74 to the second position 75, the water temperature of the water flowing out of the water outlet faucet 1 gradually increases, and vice versa. When the trigger member 53 rotates from the second position 75 to the first position 74, the water flow rate from the water inlet pipe 2 to the heating device gradually increases, and the water temperature of the water flowing out of the water outlet faucet 1 gradually decreases. When the heating power of the heating device is adjustable, when the trigger member 53 rotates from the first position 74 to the second position 75 or from the second position 75 to the first position 74, the heating device can adjust its heating power according to the water flow rate. When the water flow rate is larger, the heating power increases, and when the water flow rate is smaller, the heating power decreases, so that the water temperature of the water flowing out of the water outlet faucet 1 is a constant water temperature. When the trigger member 53 rotates from the first position 74 to the starting position 73, the micro switch 4 returns to the initial state, the heating device stops heating, and the water flow rate from the water inlet pipe 2 to the heating device gradually decreases. With such a setting, when the instant hot water faucet is in use, it only needs to be rotated unidirectionally, first discharging cold water and then hot water, unlike the existing bidirectional rotation. When rotating bidirectionally, it is very easy to turn in the wrong direction, resulting in the situation of being scalded. And when rotating from the second position 75 to the first position 74 and then to the starting position, the heat remaining in the heating device can be quickly carried away by the cold water, which can improve the service life of the heating device.

[0034] When the trigger member 53 is at the starting position 73, the water outlet faucet 1 does not discharge water. When the trigger member 53 rotates from the starting position 73 to the first position 74, the water outlet faucet 1 discharges cold water. When the trigger member 53 rotates from the first position 74 to the second position 75, the water outlet faucet 1 discharges hot water. When the trigger member 53 rotates from the second position 75 to the first position 74, the water outlet faucet 1 discharges hot water. When the trigger member 53 rotates from the first position 74 to the starting position 73, the water outlet faucet 1 discharges cold water. When the trigger member 53 rotates to the starting position, the water outlet faucet 1 does not discharge water.

[0035] As for the way of water flow rate change brought by the internal structure of the flow regulating valve 5, it can be achieved only by changing the ceramic sheet structure that controls the water flow rate inside the valve core, which belongs to the prior art and will not be elaborated here.

[0036] In this embodiment, one end of the trigger member 53 is located at the starting position 73. The arc length of the trigger member 53 is less than the arc length of the first region 71, so that the instant hot water faucet can effectively supply cold water. The arc length of the trigger member 53 is greater than or equal to the arc length of the second region 72. When the other end of the trigger member 53 rotates to the second position 75, the micro switch 4 is still triggered by the trigger member 53, ensuring the effective operation of the heating device.

[0037] A limiting block 54 is provided on the rotation trajectory of the trigger member 53. The limiting block 54 is close to the guiding inclined surface 531, and the height of the limiting block 54 is close to the height of the trigger member 53. The limiting block 54 is arranged on the side of the second position 75 away from the first position 74. When the trigger member 53 rotates to the second position 75, the trigger member 53 abuts against the limiting block 54. Through the arrangement of the limiting block 54, the rotation of the trigger member 53 and the rotating shaft 51 can be effectively limited. Of course, the limiting block 54 can also be arranged on the rotation trajectories of one or more of the rotating shaft 51, the circular connecting disc 55, and the housing 52, as long as the rotation trajectory of the trigger member 53 can be effectively limited.

[0038] In order to better fix the limiting block 54 and the microswitch 4, in this embodiment, a mounting seat 23 is integrally provided on the water inlet pipe 2.

[0039] The heating device can be a water storage cavity, and a heating element is arranged in the water storage cavity. The water flow in the water storage cavity is heated by the heating element. The heating device preferably uses a cast aluminum heating element 3.

[0040] Through the cooperation of the Hall switch 6 and the rotor, and the arrangement of the microswitch 4, the dry burning prevention performance of the instant hot water faucet is greatly improved, the working safety of the instant hot water faucet is ensured, and the supply of cold and hot water is adjusted unidirectionally, reducing the probability of being scalded.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of protection of this application.

Claims

1. An anti-dry-burning instant hot water faucet, comprising a water inlet pipe and a heating device that are connected and communicated with each other, characterized in that, It further includes a Hall switch, a rotor, and a flow regulating valve provided on the water inlet pipe. The rotor is provided inside the water inlet pipe, and the Hall switch is provided on the power connection line of the heating device. When the Hall switch senses the rotation of the rotor, it conducts. The flow regulating valve includes a rotating shaft, and a trigger is provided on the rotating shaft. The trigger rotates together with the rotating shaft. A micro switch is provided on the rotation trajectory of the trigger, and the micro switch is also provided on the power connection line of the heating device and is connected in series with the Hall switch.

2. The anti-dry burning instant hot water faucet according to claim 1, characterized in that, The water inlet pipe includes a first section and a second section that are connected and communicate with each other. The second section communicates with the heating device, and the rotor is provided inside the first section and / or the second section.

3. The anti-dry-burning instant hot water faucet according to claim 2, wherein The first section extends upward from the bottom.

4. The anti-dry-burning instant hot water faucet according to claim 1, wherein, The heating device is a cast aluminum heating body.

5. The anti-dry-burning instant hot water faucet according to claim 1, wherein, The rotation trajectory of the trigger includes a continuously arranged first area and a second area. One end of the first area far from the second area is the starting position, the connection between the first area and the second area is the first position, and one end of the second area far from the first area is the second position. The micro switch is provided in the second area and is close to the first position.

6. The anti-dry burning instant hot water faucet according to claim 5, wherein, The arc length of the trigger is greater than or equal to the arc length of the second area.

7. The anti-dry-burning instant hot water faucet according to claim 5, characterized in that, A guiding inclined surface is provided at one end of the trigger far from the starting position, and the arc length from the guiding inclined surface to the starting position gradually decreases from top to bottom.

8. The anti-dry-burning instant hot water faucet according to claim 5, wherein, When the trigger rotates from the starting position to the first position, the water flow rate from the water inlet pipe to the heating device gradually increases. When the trigger rotates from the first position to the second position, the water flow rate from the water inlet pipe to the heating device gradually decreases.

9. The anti-dry-burning instant hot water faucet according to claim 8, wherein, When the trigger rotates from the second position to the first position, the water flow rate from the water inlet pipe to the heating device gradually increases. When the trigger rotates from the first position to the starting position, the water flow rate from the water inlet pipe to the heating device gradually decreases.

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