A heating device and a toilet

Abstract

This utility model discloses a heating device and a toilet. The heating device includes a housing, a heating element, a first temperature control unit, and a second temperature control unit. The first temperature control unit is configured to activate when the temperature value measured by the first temperature sensing element is greater than or equal to a first set temperature, thereby cutting off the power supply circuit of the heating element to achieve dry-burn protection. The second temperature control unit is configured to activate when the temperature value measured by the second temperature sensing element is greater than or equal to a second set temperature, thereby cutting off the power supply circuit of the heating element, so that the water temperature at the outlet is lower than the second set temperature. The first set temperature is higher than the second set temperature. This heating device has the advantages of good heating protection safety and timely and rapid triggering of protection action.

Description

Technical Field

[0001] This utility model relates to the field of heating equipment technology, and more specifically, to a heating device and a toilet. Background Technology

[0002] Smart toilets are equipped with a heating device that heats water to provide warm water. The heating device typically includes a heating chamber and a mixing chamber. The heating chamber contains a heating element, and the water heated in the heating chamber flows into the mixing chamber, ensuring a more even water temperature. The heating device also features a heating protection function to ensure user safety. Currently, heating devices typically use a temperature control unit to implement the heating protection function, which includes a temperature control switch and / or a temperature fuse.

[0003] In existing technologies, a temperature control unit is typically installed in the mixing chamber to ensure that the outlet water temperature of the heating device does not exceed the limit, and another temperature control unit is installed on the outer wall of the heating chamber to ensure that the heating element does not dry-burn. For example, a temperature fuse is installed on the outer wall of the heating chamber to ensure that the heating element does not dry-burn. When the temperature control unit is installed on the outer wall of the heating chamber, the temperature sensing part of the temperature control unit is installed outside the housing. When the temperature sensing part performs temperature sensing operation, it needs to detect the temperature inside the housing of the heating device through the housing. The heat transfer efficiency of this process is low, as the heat transfer process involves the heat source, air, housing, and temperature sensing part of the temperature control unit. Therefore, the existing temperature control method of installing a temperature control unit on the outer wall of the heating chamber to perform dry-burn protection has the problems of low sensitivity and delayed triggering of protection action. Utility Model Content

[0004] This application provides a heating device and a toilet. The first temperature sensing part of the first temperature control unit of the heating device is located in the heating cavity. The first temperature sensing part directly measures the temperature in the heating cavity. When the temperature value measured by the first temperature sensing part is greater than or equal to the first set temperature, the first temperature control unit triggers the dry-burn protection action. The first temperature sensing part directly measures the temperature in the heating cavity, and has high measurement sensitivity. The first temperature control unit can trigger the dry-burn protection action in a timely and rapid manner.

[0005] The technical solution of this application embodiment is as follows:

[0006] A heating device, comprising:

[0007] The housing includes a heating chamber, a mixing chamber, and a connecting channel that connects the two and guides the fluid in the heating chamber to the mixing chamber. The heating chamber has an inlet for water to enter the housing, and the mixing chamber has an outlet for water to flow out of the housing.

[0008] A heating element is at least partially disposed within the heating chamber, and the heating element is configured to heat the water in the heating chamber.

[0009] A first temperature control unit includes a first temperature sensing element disposed within the heating cavity. The first temperature control unit is electrically connected to the power supply circuit of the heating element. The first temperature control unit is configured to activate when the temperature value measured by the first temperature sensing element is greater than or equal to a first set temperature, thereby cutting off the power supply circuit of the heating element to achieve dry-burn protection.

[0010] The second temperature control unit includes a second temperature sensing part disposed in the communicating flow channel. The second temperature control unit is electrically connected to the power supply circuit of the heating element. The second temperature control unit is configured to operate when the temperature value measured by the second temperature sensing part is greater than or equal to a second set temperature, so as to cut off the power supply circuit of the heating element and make the water temperature at the outlet lower than the second set temperature. The first set temperature is higher than the second set temperature.

[0011] A toilet includes a heating device as described in the above embodiments.

[0012] The technical effects of the heating device in this application embodiment are as follows:

[0013] The heating device provided in this application embodiment has a first temperature sensing part of the first temperature control unit disposed inside the heating cavity. When the temperature value measured by the first temperature sensing part is greater than or equal to a first set temperature, the first temperature control unit can cut off the power supply circuit of the heating element to prevent the heating element of the heating device from dry burning without water. The first temperature control unit mainly ensures that the circuit is quickly cut off when the heating element is dry burning without water. Since the first temperature sensing part directly measures the temperature inside the heating cavity, unlike the temperature sensing parts of the temperature control units installed on the outer wall of the heating cavity in the prior art, which need to conduct heat through the shell and air, the first temperature sensing part of this application has high sensitivity and good accuracy in measuring the dry burning situation of the heating element. In contrast, the temperature control units of the prior art installed on the outer wall of the heating cavity are prone to delays in triggering the dry burning protection action. When the heating element is dry burning without water, the first temperature sensing part of the first temperature control unit of this application can quickly detect the abnormal temperature rise inside the heating cavity. When the temperature inside the heating cavity is greater than or equal to the first set temperature, the first temperature control unit can quickly and timely trigger the protection action, avoiding the delayed triggering of the dry burning protection action.

[0014] The second temperature control unit is mainly used for over-temperature protection of the heating device. It determines whether the water in the heating device's internal cavity is heating normally, ensuring that the water flowing from the outlet will not scald the user. In this application, the second temperature sensing element of the second temperature control unit is located at the connecting flow channel, improving the accuracy of over-temperature protection. Existing temperature control units for outlet over-temperature protection typically have their sensing elements located in the mixing chamber. When abnormal heating occurs in the heating chamber, the abnormally heated water flows into the mixing chamber and mixes with the lower-temperature water, thus cooling it down. Therefore, the existing approach of placing the sensing element in the mixing chamber for outlet over-temperature protection cannot promptly and quickly measure abnormal heating in the heating device's water circuit. In contrast, the second temperature sensing element of this application is located in the connecting flow channel between the heating chamber and the mixing chamber, allowing for timely detection of abnormal heating in the heating chamber, unaffected by the low-temperature water in the mixing chamber, thus avoiding delays in the heating device's over-temperature protection action.

[0015] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0017] Figure 1 This is a schematic diagram of the structure of a heating device according to an embodiment of this application;

[0018] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the heating device;

[0019] Figure 3 This is a schematic diagram of the housing of an embodiment of this application, viewed from one angle.

[0020] Figure 4 for Figure 3 A schematic diagram of the shell structure viewed from another angle;

[0021] Figure 5 This is a schematic diagram of the structure of a first temperature control unit according to an embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the structure of the second temperature control unit according to an embodiment of this application;

[0023] Figure 7This is a schematic diagram of the structure in which the heating element and the support base are installed together according to an embodiment of this application;

[0024] Figure 8 This is a schematic diagram of the cross-sectional structure of a heating device according to an embodiment of this application, cut along a cross section;

[0025] Figure 9 for Figure 8 A magnified structural diagram of a portion of section A in the middle;

[0026] Figure 10 for Figure 8 A schematic diagram of the cross-sectional structure of the heating device taken along another section;

[0027] Figure 11 for Figure 10 A magnified structural diagram of part B;

[0028] Figure 12 This is a schematic diagram of the structure in which the heating element and the support base are installed together according to another embodiment of this application;

[0029] Figure 13 for Figure 8 A schematic diagram of the heating device cut along another cross section;

[0030] Figure 14 This is a schematic diagram of the electrical connection between the first temperature control unit, the second temperature control unit, and the heating element according to an embodiment of this application. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0032] Please refer to the instruction manual appendix. Figures 1 to 13 The diagram shows the structure of the heating device. Figure 1 , Figure 2 , Figure 4 , Figure 8 and Figure 13As shown in the figure, this application provides a heating device, which includes a housing 1, a heating element 2, a first temperature control unit 3, and a second temperature control unit 4. The housing 1 has a heating chamber 11, a mixing chamber 12, and a connecting channel 13 that connects the two and guides fluid from the heating chamber 11 to the mixing chamber 12. The heating chamber 11 has an inlet 14 for water to enter the housing 1, and the mixing chamber 12 has an outlet 15 for water to exit the housing 1. The heating element 2 is at least partially disposed within the heating chamber 11 and is configured to heat the water in the heating chamber 11. The first temperature control unit 3 includes a first temperature sensing part 31 disposed within the heating chamber 11, and is electrically connected to the power supply circuit of the heating element 2. The first temperature control unit 3 is configured to activate when the temperature value measured by the first temperature sensing unit 31 is greater than or equal to the first set temperature, thereby cutting off the power supply circuit of the heating element 2 to achieve dry-burn protection. The second temperature control unit 4 includes a second temperature sensing unit 41 disposed in the connecting channel 13, and the second temperature control unit 4 is electrically connected to the power supply circuit of the heating element 2. The second temperature control unit 4 is configured to activate when the temperature value measured by the second temperature sensing unit 41 is greater than or equal to the second set temperature, thereby cutting off the power supply circuit of the heating element 2, so that the water temperature at the outlet 15 is lower than the second set temperature. The first set temperature is higher than the second set temperature.

[0033] Specifically, Figure 1 , Figure 10 and Figure 13 The arrows in the diagram indicate the direction of water flow from the heating device. For example... Figure 1 , Figure 2 Figure 10 and Figure 13 As shown, the water flow path of the heating device in this embodiment is as follows: water enters the heating chamber 11 from the inlet 14, enters the mixing chamber 12 through the connecting channel 13 between the heating chamber 11 and the mixing chamber 12, and finally flows out from the outlet 15.

[0034] like Figure 10As shown, the first temperature sensing part 31 of the first temperature control unit 3 is disposed inside the heating cavity 11. The first temperature sensing part 31 can measure the temperature inside the heating cavity 11. The first temperature control unit 3 is electrically connected to the power supply circuit of the heating element 2. When the temperature value measured by the first temperature sensing part 31 is greater than or equal to the first set temperature, the first temperature control unit 3 can cut off the power supply circuit of the heating element 2 to prevent the heating element 2 from dry burning without water. The first temperature control unit 3 mainly ensures that the heating element 2 of the heating device quickly cuts off the circuit when it is dry burning without water. Since the first temperature sensing part 31 directly measures the temperature inside the heating cavity 11, the first temperature sensing part 31 does not need to conduct heat through the shell and air like the temperature sensing part of the temperature control unit installed on the outer wall of the heating cavity 11 in the prior art. Therefore, the first temperature sensing part 31 of this application has high sensitivity and good accuracy in measuring the dry burning of the heating element 2. In contrast, the temperature control unit installed on the outer wall of the heating cavity 11 in the prior art is prone to delays in triggering the dry burning protection action.

[0035] For example, in the prior art, temperature control units such as temperature fuses are installed on the outer wall of the heating chamber 11. The temperature fuse needs to sense temperature changes inside the heating chamber 11 through the housing 1 and air. The temperature fuse cannot detect the dry-burning condition of the heating element 2 in a timely manner, resulting in a delay in triggering the dry-burning protection action. In this application, when the heating element 2 experiences dry-burning, the first temperature control unit 3 can quickly detect the abnormal temperature rise inside the heating chamber 11. When the temperature inside the heating chamber 11 is greater than or equal to the first set temperature, the first temperature control unit 3 can quickly and timely trigger the protection action, cutting off the power supply circuit to the heating element 2 to ensure that the heating device will not catch fire or be damaged.

[0036] Optionally, the first temperature sensing part 31 can be configured as the temperature sensing surface of a temperature sensor to measure the temperature inside the heating chamber 11. The first temperature control unit 3 can be configured as a temperature controller or a temperature control switch. The first temperature control unit 3 may include a first actuator (not shown in the figure), which is electrically connected to the first temperature sensing part 31 and electrically connected to the power supply circuit of the heating element 2. The first actuator can be configured as an electronic component such as a relay. When the first actuator detects that the temperature value measured by the first temperature sensing part 31 is greater than or equal to the first set temperature, the first actuator cuts off the power supply circuit of the heating element 2. The first set temperature refers to the temperature value inside the heating chamber 11 measured by the first temperature sensing part 31 when the heating tube 21 just begins to dry-burn without water. Optionally, the first set temperature is 120°C.

[0037] like Figure 13As shown, the second temperature sensing part 41 of the second temperature control unit 4 is located in the cavity of the connecting flow channel 13 between the heating cavity 11 and the mixing cavity 12. The second temperature sensing part 41 can measure the temperature of the cavity inside the connecting flow channel 13. The second temperature control unit 4 is electrically connected to the power supply circuit of the heating element 2. When the temperature measured by the second temperature sensing part 41 is greater than or equal to the second set temperature, the power supply circuit of the heating element 2 is cut off. The second temperature control unit 4 is mainly used for over-temperature protection of the heating device. The second temperature control unit 4 can determine whether the water circuit inside the heating device is heating up normally, ensuring that the water flowing out of the outlet 15 of the heating device will not scald the human body.

[0038] Optionally, the second temperature sensing part 41 can be configured as the temperature sensing surface of a temperature sensor. The second temperature control unit 4 can be configured as a temperature controller or a temperature control switch. The second temperature control unit 4 includes a second actuator (not shown in the figure), which can be configured as an electronic component such as a relay. The second actuator is electrically connected to the power supply circuit of the heating element 2 and electrically connected to the second temperature sensing part 41. When the second actuator detects that the temperature value measured by the second temperature sensing part 41 is greater than or equal to the second set temperature, the second actuator cuts off the power supply circuit of the heating element 2. The second set temperature refers to the temperature value measured by the second temperature sensing part 41 when the water circuit inside the heating device just experiences an abnormal temperature rise, making the outlet water temperature of the heating device unsuitable for human use. Optionally, the second set temperature is 65°C.

[0039] The second temperature sensing part 41 of the second temperature control unit 4 is located at the connecting flow channel 13, which can improve the accuracy of over-temperature protection for the heating device. Existing temperature control units for outlet water over-temperature protection are typically located in the mixing chamber 12. When an abnormal temperature rise occurs in the water path of the heating chamber 11, the abnormally heated water flows into the mixing chamber 12 and mixes with the low-temperature water in the mixing chamber 12, thus lowering its temperature. Therefore, the existing method of placing the temperature control unit in the mixing chamber 12 to perform outlet water over-temperature protection cannot promptly measure abnormal temperature rises in the water path of the heating device. However, the second temperature sensing part 41 of this application is located in the connecting flow channel 13 between the heating chamber 11 and the mixing chamber 12, which can promptly measure abnormal temperature rises in the heating chamber 11, unaffected by the low-temperature water in the mixing chamber 12. The second temperature control switch 4 of this application can avoid delays in the over-temperature protection action of the heating device.

[0040] The heating device of this application embodiment has a first temperature sensing unit 31 in the heating chamber 11 and a second temperature sensing unit 41 in the connecting flow channel 13. A first set temperature is higher than a second set temperature, thus providing temperature protection devices upstream and downstream of the flow path within the heating device's inner cavity. The first temperature control unit 3 is mainly used for dry-burn protection of the heating element 2 when there is no water; the first temperature control unit 3 does not trigger protection during normal heating and water flow. The second temperature control unit 4 is mainly used for overheat protection of the heating device's outlet water. The combined use of the two temperature control units improves the safety of the heating protection of the heating device of this application.

[0041] In one exemplary embodiment, such as Figure 10 and Figure 11 As shown, the heating element 2 is a heating tube 21, and the minimum distance H between the first temperature sensing part 31 and the outer peripheral wall of the heated tube 21 is in the range of 0 to 2 mm.

[0042] Specifically, when the heating element 21 is dry-burning without water, the heating wire of the heating element 21 maintains a sustained peak heating characteristic. This necessitates the timely and rapid detection by the first temperature sensing unit 31 of any abnormal temperature rise on the surface of the heating element 21. Since air is a poor thermal conductor, the closer the first temperature sensing unit 31 is to the heating element 21, the better. This helps to shorten the time it takes for the first temperature control unit 3 to execute the dry-burning protection action, reducing the heat generated by the heating element 21 and minimizing damage to the heating device. Preferably, the minimum distance between the first temperature sensing unit 31 and the outer peripheral wall of the heating element 21 is set to 0–2 mm, which can effectively protect the heating element 21 from dry-burning.

[0043] Figure 11 In the illustrated embodiment, the first temperature sensing part 31 is planar, and the outer peripheral surface of the heating tube 21 is curved. The gap between the first temperature sensing part 31 and the outer peripheral wall of the heating tube 21 can ensure normal water flow within the heating chamber 11. It is understood that, depending on the type of temperature sensor selected, the temperature sensing surface of the first temperature sensing part 31 can also be configured as a curved surface, a dotted surface, or other shapes, all of which are within the scope of protection of this application.

[0044] In one exemplary embodiment, such as Figure 8 and Figure 9 As shown, the heating element 2 is a heating tube 21, and the first temperature sensing part 31 is disposed opposite to the outer peripheral wall of the heating tube 21, and the first temperature sensing part 31 is vertically disposed on the side of the outer peripheral wall of the heating tube 21.

[0045] Specifically, Figure 9 The arrows indicate the directions of the heating tube 21: upward, downward, leftward, and rightward. The first temperature sensing part 31 can be located on the left or right side of the outer peripheral wall of the heating tube 21, both of which are within the scope of protection of this application. Figure 9As shown, when the heating tube 21 heats the water in the heating chamber 11, the high-temperature water rises and the low-temperature water sinks. After vaporization, the steam floats on the surface of the water above the heating tube 21 in the heating chamber 11. The temperature above the heating tube 21 is higher, making the first temperature sensing element 31 more prone to false triggering when positioned above the heating tube 21. However, if the first temperature sensing element 31 is positioned below the heating tube 21, the lower water temperature below it will delay the protection action in case of dry burning. Therefore, the best effect of executing the dry burning protection action is achieved when the first temperature sensing element 31 is positioned on the side of the outer peripheral wall of the heating tube 21.

[0046] Figure 9 In the embodiment shown, the first temperature sensing part 31 is disposed opposite to the outer peripheral wall of the heating tube 21, and the first temperature sensing part 31 is vertically disposed on the side of the outer peripheral wall of the heating tube 21, rather than disposed above or below or diagonally above or diagonally below the outer peripheral wall of the heating tube 21. The approach of this embodiment can improve the accuracy of the first temperature control unit 3 in performing the dry burning protection action.

[0047] In one exemplary embodiment, such as Figures 8 to 11 As shown, the heating element 2 is a heating tube 21, and the first temperature sensing part 31 is in direct contact with the inner cavity of the heating chamber 11.

[0048] Specifically, the first temperature sensing part 31 is in direct contact with the inner cavity of the heating chamber 11, without the need for heat transfer through a medium, thus making the temperature sensing most rapid and the first temperature sensing part 31 highly sensitive.

[0049] Optionally, the first temperature sensing part 31 is covered with a metal layer, which separates the first temperature sensing part 31 from the water. The first temperature sensing part 31 does not directly contact the water, thus increasing the thermal conductivity distance between the heat source and the first temperature sensing part 31. This reduces the sensitivity of the protection action of the first temperature control unit 3, but the response speed of the protection action of the first temperature control unit 3 can be improved by lowering the first set temperature.

[0050] exist Figure 10 In the embodiment shown, the heating tube 21 is a U-shaped heating tube. It can be understood that the heating tube 21 of this application can also be set in other shapes, all of which are within the protection scope of this application.

[0051] In one exemplary embodiment, such as Figure 2 , Figure 8 and Figure 10As shown, the heating device also includes a flow guide 5, which is disposed within the heating chamber 11. The flow guide 5 and the inner wall of the heating chamber 11 enclose a heating space, and at least a portion of the heating element 2 is inserted into the heating space. The heating element 2, the inner wall of the heating chamber 11, and the flow guide 5 together form a heating channel 16. The water inlet 161 of the heating channel 16 is connected to the water inlet 14; the water outlet 162 of the heating channel 16 is connected to the connecting channel 13.

[0052] The first temperature sensing unit 31 is located in the upstream region of the water flow direction of the heating channel 16.

[0053] Specifically, the heating device is provided with a flow guide 5. The heating element 2, the inner wall of the heating chamber 11 and the flow guide 5 together form a heating channel 16. Thus, the heating device of this application is an instant heating device. The extension direction of the heating channel 16 is the same as the extension direction of the heating element 2. The water in the heating channel 16 surrounds the outside of the outer peripheral wall of the heating element 2, which can improve the heating efficiency of the heating device.

[0054] In the heating chamber, the water temperature on the outer peripheral wall surface of the heating tube 21 is higher, while the water temperature further away from the outer peripheral wall surface of the heating tube 21 is lower. This causes the water on the outer peripheral wall surface of the heating tube 21 to heat up rapidly and vaporize. The vaporized water expands in volume, propelling the water flow downstream, and heat accumulates on the downstream side of the heating channel 16. Therefore, the water temperature upstream of the heating channel 16 is lower, and the water temperature increases further downstream. Thus, when the heating chamber 11 is in a water-heating state, the first temperature sensing unit 31, located in the upstream region of the heating channel 16, is less likely to be falsely triggered. The location of the first temperature sensing unit 31 in the upstream region of the heating channel 16 ensures that the first temperature control unit 3 only performs the dry-burning protection action, and that abnormal water temperature rise during water heating in the heating chamber 11 will not falsely trigger the action.

[0055] In one exemplary embodiment, such as Figure 10 , Figure 11 and Figure 12 As shown, the heating element 2 includes a heating part 22 and a non-heating part 23. The non-heating part 23 is located upstream of the water flow direction of the heating part 22. One end of the non-heating part 23 is connected to the heating part 22, and the other end of the non-heating part 23 is located at the water inlet 161 of the heating channel 16.

[0056] At least a portion of the first temperature sensing part 31 is directly opposite the junction 24 of the non-heating part 23 and the heating part 22.

[0057] Specifically, Figure 12The arrows in the diagram indicate the direction of water flow in the heating channel 16 outside the outer peripheral wall of the lower part of the heating tube 21. The first temperature sensing part 31 is positioned close to the heating part 22, which helps ensure the sensitivity of the first temperature control unit 3 in performing the dry-burning protection action. The first temperature sensing part 31 is also positioned close to the non-heating part 23, which helps ensure that the first temperature control unit 3 will not trigger the protection action when the heating tube 21 is not dry-burning. Therefore, in this embodiment, at least a portion of the first temperature sensing part 31 is positioned directly opposite the junction 24 of the non-heating part 23 and the heating part 22. This improves the sensitivity of the first temperature control unit 3 in performing the dry-burning protection action and ensures that the first temperature control unit 3 will not mistakenly trigger the protection action when the heating tube 21 is not dry-burning.

[0058] like Figure 12 As shown, the heating element 2 is provided with a non-heating part 23. One end of the non-heating part 23 is located at the water inlet 161 of the heating channel 16, that is, the non-heating part 23 is provided at the connection between the heating element 2 and the support base 6. This helps to ensure that the support base 6 and the exposed wiring parts on the support base 6 will not be damaged by high temperature. It can be understood that... Figure 12 The two ends of the U-shaped heating tube 21 connected to the support base 6 are provided with non-heating parts 23.

[0059] In one exemplary embodiment, such as Figure 10 , Figure 11 and Figure 12 As shown, at least a portion of the first temperature sensing part 31 is disposed directly opposite to the outer peripheral wall between the first and second positions of the heating tube 21.

[0060] The first position is along Figure 12 The water flow direction shown is offset by 7.5 mm from the junction 24 towards the upstream side of the heating pipe 21, and the second position is along... Figure 12 The water flow direction shown is offset by 7.5 mm from the junction 24 to the downstream side of the heating pipe 21.

[0061] Specifically, at least a portion of the first temperature sensing part 31 is disposed directly opposite to the outer peripheral wall between the first and second positions of the junction 24 of the heating tube 21, thereby expanding the installation position range of the first temperature sensing part 31. At least a portion of the first temperature sensing part 31 can be disposed along... Figure 12 The water flow direction shown is offset by 7.5mm from the junction 24 to the upstream side of the heating tube 21. This is more conducive to ensuring that the first temperature control unit 3 will not accidentally trigger the protection action when the heating tube 21 is not dry-burning.

[0062] In some embodiments, the first temperature control unit 3 is configured as a manually reset temperature controller or a disposable temperature controller. After the first temperature control unit 3 is triggered, the power supply circuit of the heating element 2 can only be manually connected; otherwise, the heating function cannot be used. The triggering of the first temperature control unit 3 may lead to customer complaints. To ensure customer rights, the heating condition when there is water in the heating chamber 11 (whether the water is still or flowing) needs to be considered, and the first temperature control unit 3 must not be falsely triggered. Setting the upstream temperature control switch within 7.5mm upstream and downstream of the junction 24 of the heating tube 21 can reduce the probability of false triggering.

[0063] It is understood that the first and second positions in this application are not limited to being offset by 7.5 mm from the junction 24 to the upstream and downstream sides of the heating tube 21. The specific positions of the first and second positions can be adaptively adjusted according to the size of the heating cavity 11 and the heating power of the heating tube 21.

[0064] In one exemplary embodiment, such as Figure 14 As shown, both the first temperature control unit 3 and the second temperature control unit 4 are connected in series with the power supply circuit of the heating element 2.

[0065] Specifically, the heating device also includes a main control board. The first temperature control unit 3 and the second temperature control unit 4 are connected in series with the power supply circuit of the heating element 2 and then connected to the main control board of the heating device. In this way, the first temperature control unit 3 and the second temperature control unit 4 can cut off the power supply circuit of the heating element 2. The dual temperature control protection improves the safety of the heating device of this application.

[0066] The first temperature control unit 3 primarily protects the heating element 2 from dry burning when there is no water. When water is normally flowing through the heating chamber 11, the first temperature control unit 3 does not perform the power-off protection action for the heating element 2. The second temperature control unit 4 is mainly used for over-temperature protection of the heating device. The second temperature control unit 4 can determine whether the temperature rise in the water circuit of the heating device is normal, ensuring that the water temperature at the outlet 15 will not scald the human body and that the water temperature at the outlet does not exceed 65℃.

[0067] Furthermore, the second temperature control unit 4 not only protects the heating device from performing the temperature rise process according to the user's normal water temperature, but also protects the first temperature control unit 3 from being falsely triggered when there is water in the heating chamber 11. Specifically, when a heating abnormality occurs due to water in the heating chamber 11, even if there is no water flow in the heating chamber 11, the water vaporizes and expands during heating, causing the water to be pushed downstream. Moreover, the water vaporization rate is much faster than the water heat conduction rate, resulting in the water in the heating chamber 11 boiling, while the water temperature at the location of the first temperature control unit 3 is still not very high. The vaporization and expansion in the heating chamber 11 pushes the water downstream, and the water temperature on the downstream side of the heating channel 16 is higher. The second temperature control unit 4, which is closer to the downstream side of the heating channel 16, will first cut off the power supply circuit of the heating element 2. The heating device stops heating, thereby slowing down the temperature rise of the water on the upstream side of the heating channel 16, thus protecting the first temperature control unit 3 from being falsely triggered when there is water.

[0068] Furthermore, the second temperature control unit 4 also provides dry-burn protection, forming a dual dry-burn protection function with the first temperature control unit 3. Specifically, the second temperature control unit 4 is farther from the heat source than the first temperature control unit 3. The housing 1 is typically made of injection-molded plastic. When the heating element 2 experiences dry burning, air conducts heat slowly. When the temperature inside the heating chamber 11 becomes high enough to scorch the plastic of the housing 1, the scorched plastic will produce a large amount of smoke. This smoke is essentially high-temperature vaporized grease. The plastic vaporization produces a large amount of gas, and the smoke flows downstream along the heating channel 16. The second temperature control unit 4, which is closer to the downstream side of the heating channel 16, comes into contact with the high-temperature smoke first. Because the protection temperature (i.e., the second set temperature) of the second temperature control unit 4 is low, a certain amount of smoke can trigger the protection action of the second temperature control unit 4. Therefore, the first temperature control unit 3 and the second temperature control unit 4 can provide dual dry-burn protection, thereby greatly improving the reliability of the dry-burn protection of the heating device of this application.

[0069] In one exemplary embodiment, the first set temperature is in the range of 80°C to 120°C, and the second set temperature is in the range of 42°C to 48°C.

[0070] Specifically, the first temperature control unit 3 primarily protects the heating element 2 from dry burning by quickly cutting off the circuit. When the heating element 2 is dry burning, if the temperature value detected by the first temperature sensing unit 31 is greater than or equal to the first set temperature, the first temperature control unit 3 triggers a protection action, cutting off the power supply circuit to the heating element 2 to ensure that the heating device does not catch fire or emit smoke. The first temperature control unit 3 also needs to avoid triggering the protection action when the heating chamber 11 is being used for normal water heating, and the heating device should not be triggered by ambient temperature during transportation. Therefore, the first set temperature corresponding to the first temperature control unit 3 needs to be set relatively high.

[0071] The second temperature control unit 4 performs the water temperature over-temperature protection action to ensure that the water temperature at the outlet of the heating device will not scald the human body. The second temperature control unit 4 is mainly used to determine whether the temperature rise of the water circuit of the heating device is normal and does not allow the outlet water temperature to exceed 65℃.

[0072] As can be seen from the above analysis, the second set temperature corresponding to the second temperature control unit 4 is lower than the first set temperature corresponding to the first temperature control unit 3.

[0073] The first set temperature can be set to any value within the range of 80℃ to 120℃, and the second set temperature can be set to any value within the range of 42℃ to 48℃.

[0074] In an exemplary embodiment, the first temperature control unit 3 is a manually reset temperature controller or a disposable temperature controller.

[0075] Specifically, the first temperature control unit 3 is configured as a manually reset type thermostat, meaning that the first temperature control unit 3 cannot automatically reset, which improves the safety of the heating device. Since the heating device experiences high temperatures when dry-burning, which may lead to damage such as deformation of the casing 1, the first temperature control unit 3 is configured not to automatically reset. This means that when the heating device is dry-burning, once the first temperature control unit 3 is triggered, the circuit to the heating element 2 cannot be reconnected, requiring manual operation to determine when the power supply circuit to the heating element 2 is turned on.

[0076] The first temperature control unit 3 is set as a disposable temperature controller. When the heating device is dry-burning, the first temperature control unit 3 will be damaged after being triggered, thereby disconnecting the circuit of the heating element 2. It is necessary to manually replace the first temperature control unit 3 to reconnect the power supply circuit of the heating element 2. This can improve the safety of the heating device and avoid damage to the heating device caused by prolonged dry-burning.

[0077] In an exemplary embodiment, the second temperature control unit 4 is an automatic reset temperature controller, a manual reset temperature controller, or a PTC temperature controller.

[0078] Specifically, the second temperature control unit 4 can be set as an automatic reset temperature controller, that is, the second temperature control unit 4 can be automatically reset. When the temperature in the connecting channel 13 cools down, the second temperature control unit 4 will automatically close again. This eliminates the need for manual operation to connect the power supply circuit of the heating element 2, simplifying manual operation.

[0079] The second temperature control unit 4 can also be set as a manual reset temperature controller, which can be closed manually, allowing the user to decide when to use the heating function of the heating device.

[0080] The second thermostat 4 can also be set as a PTC thermostat. A PTC thermostat is a thermistor device based on semiconductor materials. Its resistance increases with increasing temperature. When the outlet water temperature of the heating device is too high, the resistance of the PTC thermostat will increase sharply, thereby limiting the current flow and preventing the equipment from overheating and being damaged. PTC thermostats have unique temperature response characteristics and accurate measurement capabilities.

[0081] In one exemplary embodiment, such as Figure 4 and Figure 13 As shown, the connecting channel 13 and the mixing chamber 12 are both located above the heating chamber 11. The connecting channel 13 includes an upstream channel 131 connected to the heating chamber 11 and a downstream channel 132 connected to the mixing chamber 12. The second temperature sensing part 41 is provided in the downstream channel 132.

[0082] Specifically, since the high-temperature water in the heating chamber 11 floats upward and the low-temperature water sinks downward, the connecting channel 13 and the mixing chamber 12 are both located above the heating chamber 11. This facilitates the flow of the high-temperature water heated by the heating element 2 in the heating chamber 11 to the side of the mixing chamber 12, and also facilitates the rise of steam bubbles in the heating chamber 11 and their discharge from the mixing chamber 12.

[0083] The second temperature sensing unit 41 is located in the downstream flow channel 132 of the connecting flow channel 13. In this way, the second temperature sensing unit 41 is located close to the mixing chamber 12. The water temperature in the mixing chamber 12 is close to the water temperature at the outlet 15. The water temperature value measured by the second temperature sensing unit 41 is also close to the water temperature at the outlet 15 of the heating device. This helps the second temperature control unit 4 to ensure that the water temperature at the outlet of the heating device meets the needs of human use.

[0084] In one exemplary embodiment, such as Figure 2 , Figure 3 , Figure 4 and Figure 13 As shown, one end of the housing 1 is provided with an opening 17 that communicates with both the heating chamber 11 and the mixing chamber 12. The heating device also includes a support base 6, which is connected to the housing 1 and covers the opening 17. One end of the heating element 2 is supported on the support base 6.

[0085] The side wall of the housing 1 is provided with a first mounting port 18 for installing the first temperature control unit 3, and the top wall of the housing 1 is provided with a second mounting port 19 for installing the second temperature control unit 4.

[0086] Specifically, one end of the housing 1 is provided with an opening 17 that communicates with both the heating chamber 11 and the mixing chamber 12. The opening 17 is covered by a support base 6, which simplifies the manufacturing process of the housing 1 and facilitates the assembly process of the heating device. The support base 6 and the housing 1 together form the heating chamber 11 and the mixing chamber 12. The support base 6 also serves to support the wiring wires connecting the heating element 2 and the mounting wires of the heating element 2.

[0087] The first mounting port 18 is used to install and fix the first temperature control unit 3, and the second mounting port 19 is used to install and fix the second temperature control unit 4. Figure 3 In the embodiment of the housing 1 shown, the inlet 14, outlet 15, first mounting port 18 and second mounting port 19 are all located near the opening end of the housing 1, which helps to simplify the processing and forming process of the housing 1.

[0088] In some exemplary embodiments, such as Figure 2 and Figure 13 As shown, the heating device also includes a sealing element 7, which is located between the opening 17 end of the housing 1 and the support base 6. The sealing element 7 can ensure the sealing of the heating chamber 11 and the mixing chamber 12.

[0089] This application provides a toilet that includes a heating device as described in any of the exemplary embodiments above.

[0090] Specifically, the toilet provided in this application includes a heating device as described in any of the exemplary embodiments above, and therefore has the structural features and advantages of the heating device described in any of the exemplary embodiments above, which will not be repeated here.

[0091] It is understood that the heating device of this application embodiment can be applied not only to toilets, but also to other devices that require water heating.

[0092] In the description of this application, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0093] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0094] Although the embodiments disclosed in this application are as described above, the content described is merely for the purpose of understanding this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be defined by the appended claims.

Claims

1. A heating device, characterized in that, include: The housing includes a heating chamber, a mixing chamber, and a connecting channel that connects the two and guides the fluid in the heating chamber to the mixing chamber. The heating chamber has an inlet for water to enter the housing, and the mixing chamber has an outlet for water to flow out of the housing. A heating element is at least partially disposed within the heating chamber, and the heating element is configured to heat the water in the heating chamber. The first temperature control unit includes a first temperature sensing element disposed in the heating cavity. The first temperature control unit is electrically connected to the power supply circuit of the heating element. The first temperature control unit is configured to activate when the temperature value measured by the first temperature sensing element is greater than or equal to a first set temperature, so as to cut off the power supply circuit of the heating element to achieve dry burning protection. and The second temperature control unit includes a second temperature sensing part disposed in the communicating flow channel. The second temperature control unit is electrically connected to the power supply circuit of the heating element. The second temperature control unit is configured to operate when the temperature value measured by the second temperature sensing part is greater than or equal to a second set temperature, so as to cut off the power supply circuit of the heating element and make the water temperature at the outlet lower than the second set temperature. The first set temperature is higher than the second set temperature.

2. The heating device of claim 1, wherein The heating element is a heating tube; wherein: The minimum distance between the first temperature sensing element and the outer peripheral wall of the heating tube is in the range of 0 to 2 mm; and / or, The first temperature sensing element is disposed opposite to the outer peripheral wall of the heating tube, and the first temperature sensing element is vertically disposed on the side of the outer peripheral wall of the heating tube; and / or, The first temperature sensing part is in direct contact with the inner cavity of the heating chamber.

3. The heating device of claim 2, wherein, It also includes a flow guide, which is disposed inside the heating chamber. The flow guide and the inner wall of the heating chamber enclose a heating space, and at least a portion of the heating element is inserted into the heating space. The heating element, the inner wall of the heating chamber, and the flow guide together form a heating channel. The water inlet of the heating channel is connected to the water inlet. The water outlet of the heating channel is connected to the connecting channel. The first temperature sensing part is located in the upstream region of the water flow direction of the heating channel.

4. The heating device according to claim 3, characterized in that, The heating element includes a heating part and a non-heating part. The non-heating part is located upstream of the heating part in the direction of water flow. One end of the non-heating part is connected to the heating part, and the other end of the non-heating part is located at the water inlet of the heating channel. At least a portion of the first temperature sensing part is directly opposite the junction of the non-heating part and the heating part.

5. The heating device of claim 4, wherein, At least a portion of the first temperature sensing part is disposed opposite to the outer peripheral wall between the first position and the second position of the heating tube; wherein, the first position is offset by 7.5 mm from the junction to the upstream side of the heating tube along the water flow direction, and the second position is offset by 7.5 mm from the junction to the downstream side of the heating tube along the water flow direction.

6. The heating device according to any one of claims 1 to 5, characterized in that, Both the first temperature control unit and the second temperature control unit are connected in series with the power supply circuit of the heating element.

7. The heating device according to claim 5, characterized in that, The first set temperature is in the range of 80℃ to 120℃, and the second set temperature is in the range of 42℃ to 48℃.

8. The heating device according to any one of claims 1 to 5, characterized in that, The first temperature control unit is a manually reset temperature controller or a disposable temperature controller; and / or, the second temperature control unit is an automatically reset temperature controller, a manually reset temperature controller, or a PTC temperature controller.

9. The heating device according to any one of claims 1 to 5, characterized in that, The connecting channel and the mixing chamber are both located above the heating chamber. The connecting channel includes an upstream channel connected to the heating chamber and a downstream channel connected to the mixing chamber. The second temperature sensing part is located in the downstream channel.

10. The heating device according to any one of claims 1 to 5, characterized in that, One end of the housing is provided with an opening that communicates with both the heating chamber and the mixing chamber. The heating device also includes a support base, which is connected to the housing and covers the opening. One end of the heating element is supported on the support base. The side wall of the housing is provided with a first mounting port for installing the first temperature control unit, and the top wall of the housing is provided with a second mounting port for installing the second temperature control unit.

11. A toilet characterized by Includes the heating device as described in any one of claims 1 to 10.

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