Heating device and water drinking equipment

Abstract

The utility model belongs to the technical field of water drinking equipment, and discloses a heating device and water drinking equipment. The heating device comprises a shell, a heating body and a first temperature detection piece, and the shell is provided with a water inlet and a water outlet; the heating body is arranged in the shell, a heating flow channel is formed in the heating body, and the heating flow channel is communicated with the water inlet and the water outlet; the first temperature detection part is arranged in the shell and comprises a first detection end, the first detection end is located in the heating flow channel, and the first detection end and the axis of the heating flow channel are arranged at intervals in the radial direction of the heating flow channel and the first detection end and the inner wall of the heating flow channel are arranged at intervals. The first detection end is arranged close to the inner wall of the heating flow channel, so that the water temperature detected by the first temperature detection piece is close to the highest water temperature of water in the heating flow channel in the preheating stage, faster response time and more accurate temperature control can be obtained, and control over the preheating working condition can be achieved easily.

Description

Technical Field

[0001] The utility model relates to the technical field of drinking water equipment, in particular to a heating device and drinking water equipment. Background Art

[0002] Water purifiers with instant hot water heating typically include a heater that heats the water. Traditional water purifiers operate simultaneously with the water pump and heater. Because the water absorbs heat and heats up over time, the user's initial water temperature ranges from room temperature to the set temperature. The initial water delivery is warm, and this process takes over seven seconds, resulting in a long water delivery time.

[0003] Some water purifiers have a preheating stage. When hot water is being dispensed, the heater is first started. After a period of heating, the difference between the water temperature in the heater and the target outlet water temperature is shortened. The water pump is then started to pump water out. During the water outlet process, the heating power of the heater is adjusted according to the control algorithm so that the temperature at the outlet gradually approaches the target outlet water temperature. Since the water pump is not started and the water path is not flowing during preheating, the heat convection effect is weak at this time, and heat conduction requires a certain amount of time. The water inlet temperature detection element and the water outlet temperature sensor are both located outside the heater, and the actual water temperature in the heater cannot be directly obtained. Heat conduction requires a certain amount of time, resulting in hysteresis in temperature control. In instant heating heaters, the control accuracy of the preheating condition is 100ms, so the response hysteresis will greatly affect the control accuracy.

[0004] At present, the above problem is generally improved by setting the temperature difference protection time, that is, setting the maximum preheating time. After starting the heating body, when the heating time exceeds the preset maximum preheating time, the water pump is turned on immediately. However, the outlet water temperature difference of this method is generally greater than 10°C, and it takes at least 3 seconds to adjust the outlet water temperature to the set temperature, which affects the user experience. Utility Model Content

[0005] The purpose of the utility model is to provide a heating device and a drinking water device, which can detect the temperature more accurately and quickly and improve the control accuracy of the preheating working condition.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A heating device, comprising:

[0008] a housing, wherein the housing is provided with a water inlet and a water outlet;

[0009] A heating body, the heating body being disposed in the housing, a heating flow channel being formed in the heating body, the heating flow channel being connected to the water inlet and the water outlet;

[0010] A first temperature detection component is arranged on the outer shell, and the first temperature detection component includes a first detection end. The first detection end is located in the heating channel. Along the radial direction of the heating channel, the first detection end is spaced apart from the axis of the heating channel and the inner wall of the heating channel.

[0011] As an optional solution of the above-mentioned heating device, the thermal time constant of the first temperature detection element is less than 0.5s.

[0012] As an optional solution of the above-mentioned heating device, along the radial direction of the heating channel, the distance between the first detection end and the inner wall of the heating channel is 0.5 mm-1.5 mm.

[0013] As an optional solution of the above-mentioned heating device, the first detection end is arranged at an end of the heating flow channel close to the water outlet.

[0014] As an optional solution of the above-mentioned heating device, along the extension direction of the heating flow channel, the distance between the first detection end and the water outlet is less than 20 mm;

[0015] And / or, along the extension direction of the heating channel, the distance between the end of the heating channel close to the water outlet and the water outlet is 9 mm-16 mm.

[0016] As an optional solution of the above-mentioned heating device, the first temperature detecting member further includes:

[0017] a mounting body, the mounting body being passed through one end of the shell along the axial direction of the heating flow channel and connected to the shell;

[0018] The detection part is connected to the end of the installation body extending into the shell, the detection part extends radially along the heating flow channel, and the end of the detection part close to the inner wall of the heating flow channel is the detection end.

[0019] As an optional solution of the above-mentioned heating device, the housing includes:

[0020] a tube shell, wherein both axial ends of the tube shell are open;

[0021] A first end cap and a second end cap are connected to the upper and lower ends of the tube shell respectively, the first end cap is provided with a water inlet, the second end cap is provided with a water outlet, and the first temperature detection element is provided on the second end cap;

[0022] The heating body includes a heating tube, which is arranged in the tube shell, and has two ends sealedly connected to the first end cover and the second end cover respectively, and the heating flow channel is formed in the heating tube.

[0023] As an optional solution of the above-mentioned heating device, the heating device further includes a guide member arranged in the heating flow channel, and the guide member is used to guide the water in the heating flow channel to flow in a curved manner.

[0024] As an optional solution of the above-mentioned heating device, the heating device also includes a second temperature detection member arranged on the shell, the second temperature detection member includes a second detection end, and the second detection end is located in the water inlet and outside the heating flow channel.

[0025] A drinking water device comprises the above-mentioned heating device.

[0026] Beneficial effects of the utility model:

[0027] In the heating device provided by the present invention, the first detection end is located in the heating flow channel and detects the actual water temperature in the heating flow channel. This enables the first temperature detection element to obtain a more accurate water temperature when the water in the heating flow channel is stationary or flowing, effectively improving the accuracy of the thermal control algorithm and facilitating the control of the preheating condition.

[0028] The first detection end is spaced apart from the axis of the heating channel and from the inner wall of the heating channel. That is, the first detection end is arranged close to the inner wall of the heating channel, so that the water temperature detected by the first temperature detection component is close to the highest water temperature of the water in the heating channel during the preheating stage, which can obtain faster response time and more accurate temperature control, and is conducive to the control of the preheating working condition.

[0029] The drinking water equipment provided by the utility model includes the above-mentioned heating device, which can detect the temperature more accurately and quickly, and improve the control accuracy of the preheating working condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the heating device provided by the utility model.

[0031] In the picture:

[0032] 10. Outer shell; 11. Tube shell; 12. First end cover; 121. Water inlet; 13. Second end cover; 131. Water outlet; 20. Heating element; 21. Heating flow channel; 30. First temperature detection element; 31. Mounting body; 32. Detection part; 321. First detection end; 40. Second temperature detection element; 50. Flow guide; 51. Column; 52. Spiral flow guide structure; 60. Temperature controller. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] This embodiment provides a drinking water device with an instant heating function. The drinking water device can be a direct drinking machine or a water dispenser.

[0038] The drinking water device includes a water pump, a heating device, and a water outlet structure, which are connected in sequence. The heating device is connected to the water pump and the water outlet structure. When the drinking water device is in operation, the water is pumped into the heating device by the water pump, heated to the required temperature by the heating device, and then flows out through the water outlet structure for the user to use.

[0039] To reduce the amount of cold water flowing out of the front end when users draw hot water, the heating device incorporates a preheating phase and a water-discharging phase upon startup. During the preheating phase, the heating device is activated, and the water pump is stopped to preheat the stationary water within the heating device. During the water-discharging phase, the heating device continues to operate, and the water pump is activated. After passing through the heating device, the water enters the water-discharging structure. During this process, the heating device continuously heats the water, achieving instantaneous hot water output. By adding a preheating phase, the water within the heating device is heated, and after the water pump is activated, hot water is directly discharged, reducing the amount of cold water discharged, thereby better controlling the actual outlet water temperature.

[0040] like Figure 1 As shown, the heating device includes a housing 10 and a heating body 20. The housing 10 is provided with a water inlet 121 and a water outlet 131. The heating body 20 is disposed within the housing 10. The heating body 20 is hollow and forms a heating flow channel 21. The heating flow channel 21 is respectively connected to the water outlet 131 and the water inlet 121. Water enters the heating flow channel 21 through the water inlet 121, is heated by the heating body 20, and then flows out through the water outlet 131.

[0041] When the water pump is not working, water is retained in the heating flow channel 21. In the preheating stage, the water pump is not working, the heating device is started, and the heating body 20 is energized to heat the water in the heating flow channel 21 to reduce the cold water in the water intake stage.

[0042] In order to control the preheating temperature, the prior art provides a temperature sensor at the water outlet 131 of the heating device, or attaches the temperature sensor to the heating body 20 to detect the water temperature at the outlet or the temperature of the heating body 20. Since the water in the heating channel 21 does not flow during the preheating phase, the heat convection rate is slow, and heat transfer takes a certain amount of time, resulting in a deviation between the water temperature at the water outlet 131 and the water temperature in the heating channel 21. The temperature sensor cannot detect the actual change in the water temperature inside the heating body 20 in a timely manner, resulting in hysteresis in the temperature control. This hysteresis may cause the water temperature in the heating body 20 to exceed the preset range, affecting the user experience and device performance.

[0043] To address the above-mentioned issues, the heating device further includes a first temperature sensing member 30, which is disposed on the housing 10 and includes a first sensing end 321. The first sensing end 321 is located within the heating channel 21. Compared to a temperature sensing member disposed at the water outlet 131 to detect the outlet water temperature, or a temperature sensing member attached to the heating body 20 to detect the surface temperature of the heating body 20, in this embodiment, the first sensing end 321 of the first temperature sensing member 30 is located within the heating channel 21 and detects the actual water temperature within the heating channel 21. This enables the first temperature sensing member 30 to obtain a more accurate water temperature whether the water within the heating channel 21 is stationary or flowing, effectively improving the accuracy of the thermal control algorithm and facilitating control of the preheating condition.

[0044] Furthermore, along the radial direction of the heating channel 21, the first detection end 321 is spaced apart from the axis of the heating channel 21 and is spaced apart from the inner wall of the heating channel 21. That is, the first detection end 321 is arranged close to the inner wall of the heating channel 21, so that the water temperature detected by the first temperature detection component 30 is close to the highest water temperature of the water in the heating channel 21 during the preheating stage, which can obtain a faster response time and more accurate temperature control, and is conducive to the control of the preheating working condition.

[0045] In this embodiment, the first temperature detection member 30 may be a thermistor. The resistance value of the thermistor can change with the temperature, and the thermistor has high sensitivity, small size, is easy to process into various shapes, and has good stability and overload capacity.

[0046] In other embodiments, the first temperature detecting component 30 may also be of other structures as long as it can detect the water temperature.

[0047] To achieve high-precision, rapid preheating temperature control, positioning the first detection end 321 within the heating channel 21 to ensure accurate temperature detection is a key factor. Shortening the thermal time constant of the first temperature detection element 30 is another important factor. The thermal time constant is a key parameter of a thermistor. Also known as thermal response time, it refers to the time it takes for a thermistor to reach 63% of the ambient temperature change value when the temperature changes. A smaller thermal time constant indicates better thermistor performance.

[0048] Since the control accuracy of the preheating condition is high, generally not exceeding 100ms, the smaller the thermal time constant of the first temperature detection component 30 is, the more conducive it is to timely and accurate preheating temperature control. For this reason, in this embodiment, the thermal time constant of the first temperature detection component 30 is less than 0.5s, reducing the temperature detection hysteresis caused by the long thermal convection time in the preheating stage.

[0049] Optionally, the distance between the first detection end 321 and the inner wall of the heating channel 21 along the radial direction of the heating channel 21 is 0.5 mm to 1.5 mm. Within this range, the water temperature detected by the first detection end 321 is closer to the maximum water temperature in the heating channel 21, and a certain distance from the inner wall of the heating channel 21 prevents the first detection end 321 from directly contacting the heating element 20, which would lead to inaccurate temperature detection.

[0050] Exemplarily, along the radial direction of the heating channel 21, typical but non-limiting data of the distance between the first detection end 321 and the inner wall of the heating channel 21 is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, and 1.5mm.

[0051] To reduce the number of components in the heating device, the first detection end 321 can be located at the end of the heating channel 21 near the water outlet 131. During the water outlet phase, the temperature detected by the first detection end 321 is close to the water outlet temperature of the heating device. This allows the first detection element to be used for temperature control during both the preheating phase and the water outlet phase, eliminating the need for an additional temperature detection element at the water outlet 131. This simplifies the structure, reduces the number of components, and controls the size and cost of the heating device.

[0052] Optionally, along the extension direction of the heating channel 21, the distance between the first detection end 321 and the water outlet 131 is less than 20 mm, so as to avoid the distance between the two being too long, resulting in excessive heat loss during the flow of water, and thus causing large deviation in the outlet water temperature, which is beneficial to improving the accuracy of temperature control in the water outlet stage.

[0053] Preferably, the distance between the first detection end 321 and the water outlet 131 is less than 16 mm. For example, along the extension direction of the heating flow channel 21, typical but non-limiting data of the distance between the first detection end 321 and the water outlet 131 are 15 mm, 14 mm, 13 mm, 12 mm, 11 mm, and 10 mm.

[0054] Optionally, along the extension direction of the heating channel 21, the distance between the end of the heating channel 21 near the water outlet 131 and the water outlet 131 is 9 mm to 16 mm. Within this range, the distance between the water outlet 131 and the heating channel 21 is small, and the water heated by the heating channel 21 can flow out quickly through the water outlet 131, reducing heat loss during the flow process.

[0055] Preferably, the distance between the end of the heating channel 21 near the water outlet 131 and the water outlet 131 is 11.5 mm to 14 mm. For example, along the extension direction of the heating channel 21, typical but non-limiting data of the distance between the end of the heating channel 21 near the water outlet 131 and the water outlet 131 are 11.5 mm, 12 mm, 12.5 mm, 13 mm, 13.5 mm, and 14 mm.

[0056] In this embodiment, the heater 20 is a thick-film heater. Thick-film heaters are manufactured by mixing superconducting ceramic material powder with an organic binder solvent to form a paste. The paste is then printed onto a substrate using screen printing in the form of circuit wiring or patterns. The film is then sintered through a rigorous heat treatment process to form a superconducting thick film. The film has a superconducting transition temperature above 90K and a zero-resistance temperature above 80K.

[0057] Specifically, the first detection end 321 is located in the thick film covering area of ​​the thick film heating body to directly contact the heated water, thereby improving the accuracy of temperature detection.

[0058] Combine Figure 1 As shown, the housing 10 includes a tube shell 11 and two end caps, namely a first end cap 12 and a second end cap 13. Both axial ends of the tube shell 11 are open. One axial end of the tube shell 11 is removably connected to the first end cap 12, which is provided with a water inlet 121. The other axial end of the tube shell 11 is removably connected to the second end cap 13, which is provided with a water outlet 131. The first temperature detection member 30 is disposed on the second end cap 13. Both the first end cap 12 and the second end cap 13 are removably connected to the tube shell 11, facilitating the installation of the first temperature detection member 30 and the heating element 20, and facilitating after-sales maintenance of the heating device.

[0059] In order to facilitate the first temperature detection component 30 to detect the water temperature within the coverage range of the thick film heating body, the first temperature detection component 30 includes an installation body 31 and a detection part 32. The installation body 31 is passed through one end of the outer shell 10 along the axial direction of the heating channel 21 and is connected to the outer shell 10; the detection part 32 is connected to the end of the installation body 31 extending into the outer shell 10, and extends radially along the heating channel 21, wherein the end of the detection part 32 close to the inner wall of the heating channel 21 is the first detection end 321.

[0060] Specifically, the mounting body 31 is inserted through the second end cap 13 to position the first temperature detector 30 close to the outlet of the heating channel 21. The mounting body 31 cooperates with the second end cap 13 to install the detection portion 32 within the heating channel 21 without requiring holes in the heater 20 or the tube shell 11, ensuring the heating efficiency of the heater 20 and improving the sealing performance of the housing 10. The detection portion 32 extends radially along the heating channel 21, forming a roughly L-shaped arrangement between the mounting body 31 and the detection portion 32. This shortens the distance between the first detection end 321 of the detection portion 32 and the inner wall of the heating channel 21, thereby improving the accuracy of temperature detection.

[0061] In this embodiment, the heating body 20 includes a heating tube, which is hollow and has a heating flow channel 21 formed inside. The heating tube is arranged in the tube shell 11, and its two ends are respectively sealed with the first end cover 12 and the second end cover 13, thereby preventing water from entering the gap between the heating tube and the tube shell 11, ensuring that water enters the heating tube through the water inlet 121 of the first end cover 12 and is discharged through the water outlet 131 on the second end cover 13.

[0062] Optionally, the first end cover 12 and the second end cover 13 may be connected to the tube shell 11 by screws, clamping or threads, etc., to facilitate disassembly.

[0063] In order to seal the assembly gap between the heating tube and the two end covers, the heating device further includes a seal. A seal is provided between the first end cover 12 and the heating tube and between the second end cover 13 and the heating tube to prevent water leakage in the heating channel 21.

[0064] Optionally, the first end cover 12 and the second end cover 13 both include a cover plate and an inner flange, a through hole is provided on the cover plate, the inner flange is provided around the through hole and extends toward the inner side of the tube shell 11, both axial ends of the heating tube are sleeved on the inner flange, and the seal can be clamped and fixed between the heating tube and the inner flange, or the seal can be clamped and fixed between the heating tube and the cover plate.

[0065] Optionally, the inner flange and the heating tube may be connected by threaded fitting, which not only improves stability but also provides a sealing effect through the fitting inner and outer threads.

[0066] In order to improve the heating effect of water in the heating channel 21, the heating device also includes a guide member 50 arranged in the heating channel 21. The guide member 50 is used to guide the water in the heating channel 21 to flow in a curved manner, extend the flow path of the water in the heating channel 21, and thus improve the heating effect.

[0067] In this embodiment, the guide member 50 includes a column 51 and a spiral guide structure 52 formed on the outer peripheral wall of the column 51. After water enters the heating flow channel 21, it will flow in a spiral under the guidance of the spiral guide structure 52 to extend the flow path.

[0068] Optionally, the spiral guide structure 52 may be a spirally extending ridge or a spirally extending groove.

[0069] Optionally, the column 51 may be a hollow structure or a solid structure.

[0070] In other embodiments, the flow guide 50 may be a spiral body as a whole, such as a spirally extending blade.

[0071] In this embodiment, the heating device further includes a second temperature sensing member 40 disposed on the housing 10. The second temperature sensing member 40 includes a second sensing end located within the water inlet 121 and outside the heating flow channel 21. The second temperature sensing member 40 is used to detect the water temperature at the water inlet 121 of the heating device to facilitate control of the outlet water temperature.

[0072] like Figure 1 As shown, the water inlet 121 can be set on the axial end surface of the first end cover 12, and the second temperature detection component 40 can extend radially along the first end cover 12 and extend into the first end cover 12 from the circumferential side wall of the first end cover 12.

[0073] In other embodiments, the second temperature detection component 40 may also extend axially along the first end cover 12, and the second temperature detection component 40 extends from the axial end face of the first end cover 12 into the first end cover 12. Correspondingly, the water inlet 121 may be arranged on the circumferential side wall of the first end cover 12.

[0074] Alternatively, the water outlet 131 may be provided on a circumferential sidewall of the second end cap 13 or on an axial end surface of the second end cap 13. The mounting body 31 of the first temperature sensing member 30 may extend from the circumferential sidewall of the second end cap 13 into the housing 10, as long as the first sensing end 321 is positioned close to the inner wall of the heating channel 21.

[0075] In other embodiments, the positions of the water inlet 121 , the water outlet 131 , the first temperature detecting element 30 and the second temperature detecting element 40 can be adjusted according to actual needs.

[0076] In this embodiment, the water inlet 121 is provided at the bottom end of the housing 10 , and the water outlet 131 is provided at the top end of the housing 10 , so that water flows from top to bottom in the heating channel 21 to improve the heating effect.

[0077] Optionally, the heating device further includes a thermostat 60 disposed on the housing 10. The thermostat 60 can cut off power to the heating device when the temperature of the housing 10 is abnormal, thereby ensuring electrical safety. For example, the thermostat 60 can be a snap-action thermostat. For example, two or more thermostats 60 can be provided.

[0078] It should be noted here that the first temperature detection component 30, the second temperature detection component 40 and the temperature controller 60 are all existing technologies in this field. This embodiment can adopt any temperature detection component and temperature controller 60 in the existing technology. Their structure, working principle and connection circuit are no longer specifically introduced in this embodiment.

[0079] Optionally, the drinking water equipment further comprises a water tank, the water tank is connected to the inlet of the water pump, and the water outlet structure is connected to the outlet end of the heating device.

[0080] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A heating device, characterized in that: include: A housing (10), wherein the housing (10) is provided with a water inlet (121) and a water outlet (131); a heating body (20), the heating body (20) being disposed in the housing (10), a heating flow channel (21) being formed in the heating body (20), the heating flow channel (21) being in communication with the water inlet (121) and the water outlet (131); A first temperature detecting member (30) is provided in the housing (10), and the first temperature detecting member (30) includes a first detecting end (321). The first detecting end (321) is located in the heating channel (21), and along the radial direction of the heating channel (21), the first detecting end (321) is spaced apart from the axis of the heating channel (21) and is spaced apart from the inner wall of the heating channel (21).

2. The heating device according to claim 1, characterized in that The thermal time constant of the first temperature detection element (30) is less than 0.5s.

3. The heating device according to claim 1, characterized in that Along the radial direction of the heating channel (21), the distance between the first detection end (321) and the inner wall of the heating channel (21) is 0.5 mm to 1.5 mm.

4. The heating device according to any one of claims 1 to 3, characterized in that: The first detection end (321) is arranged at an end of the heating flow channel (21) close to the water outlet (131).

5. The heating device according to claim 3, characterized in that Along the extension direction of the heating flow channel (21), the distance between the first detection end (321) and the water outlet (131) is less than 20 mm; And / or, along the extension direction of the heating channel (21), the distance between the end of the heating channel (21) close to the water outlet (131) and the water outlet (131) is 9 mm-16 mm.

6. The heating device according to any one of claims 1 to 3, characterized in that: The first temperature detecting member (30) further comprises: An installation body (31), the installation body (31) is provided through one end of the housing (10) along the axial direction of the heating flow channel (21) and is connected to the housing (10); A detection portion (32), the detection portion (32) is connected to an end of the mounting body (31) extending into the housing (10), the detection portion (32) extends radially along the heating channel (21), and an end of the detection portion (32) close to the inner wall of the heating channel (21) is the first detection end (321).

7. The heating device according to any one of claims 1 to 3, characterized in that: The housing (10) comprises: A tube shell (11), wherein both axial ends of the tube shell (11) are open; A first end cover (12) and a second end cover (13) are respectively connected to the upper and lower ends of the tube shell (11); the first end cover (12) is provided with a water inlet (121); the second end cover (13) is provided with a water outlet (131); and the first temperature detecting element (30) is provided on the second end cover (13); The heating body (20) comprises a heating tube, which is arranged in the tube shell (11) and has two ends sealedly connected to the first end cover (12) and the second end cover (13) respectively, and the heating flow channel (21) is formed in the heating tube.

8. The heating device according to any one of claims 1 to 3, characterized in that: The heating device further comprises a flow guide (50) arranged in the heating flow channel (21), and the flow guide (50) is used to guide the water in the heating flow channel (21) to flow in a curved manner.

9. The heating device according to any one of claims 1 to 3, characterized in that: The heating device further comprises a second temperature detecting member (40) arranged on the housing (10), the second temperature detecting member (40) comprising a second detecting end, the second detecting end being located inside the water inlet (121) and outside the heating flow channel (21).

10. A drinking water device, characterized in that: The heating device comprises the heating device according to any one of claims 1 to 9.

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