Hot water tank and water purifier comprising same

Abstract

The utility model provides a hot water tank and a water purifier comprising the same. The hot water tank comprises a main water tank, a heating body is inserted into a main water storage cavity of the main water tank, and the heating body is located in the bottom area and / or the middle area of the main water storage cavity; the auxiliary water tank is arranged on one side of the main water tank, and a liquid level probe is arranged in an auxiliary water storage cavity of the auxiliary water tank; wherein a communicating opening for communicating the main water storage cavity with the auxiliary water storage cavity is formed in the side, close to the auxiliary water tank, of the main water tank, the communicating opening is located in the bottom area, and the position, in the main water storage cavity, of the heating body is higher than the position, in the height direction, of the communicating opening. The auxiliary water tank is additionally arranged, the main water storage cavity of the main water tank and the auxiliary water storage cavity of the auxiliary water tank achieve the same liquid level through the communication port, and the liquid level probe is installed in the auxiliary water storage cavity, so that the situation that boiling water flows to the surface of the liquid level probe due to heating of a heating body in the main water storage cavity, and probe recognition errors are caused is avoided; and the identification accuracy of the liquid level probe is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hot water tank and purifier containing it. BACKGROUND

[0002] The prior art in the heating purifier all has hot water tank, and the hot water tank will install liquid level probe or liquid level float ball, these hot water tanks always will occur when the electric heating body in the hot water tank is heating, liquid level will keep jumping from low to high liquid level, the reason is that a large amount of water vapor will be produced in the hot water tank when heating, will make the hot water in the tank boil, these boiling water flow to the surface of liquid level probe, and the probe will think that the liquid level in the tank has reached the water level, in fact, it is not, leading to probe identification error. SUMMARY

[0003] The utility model solves the technical problem that the liquid level probe in the hot water tank is easily affected by the boiling water, leading to probe identification error, and provides a hot water tank and purifier containing it.

[0004] The utility model solves the above technical problem through the following technical scheme:

[0005] A hot water tank, characterized in that the hot water tank comprises:

[0006] A main water tank is provided with a main water storage cavity, the main water storage cavity comprises a bottom region, a middle region and a top region from bottom to top along the height direction of the hot water tank, a heating body is inserted into the main water storage cavity, the heating body is located in the bottom region and / or the middle region, the bottom region is communicated with a water inlet pipe, and the middle region is communicated with a water outlet pipe;

[0007] A sub water tank is arranged on one side of the main water tank, and the sub water tank is provided with a sub water storage cavity, and the sub water storage cavity is provided with a liquid level probe;

[0008] The side of the main water tank close to the sub water tank is provided with a communication port communicated with the main water storage cavity and the sub water storage cavity, the communication port is located in the bottom region, and along the height direction, the position of the heating body in the main water storage cavity is higher than the position of the communication port.

[0009] In the technical scheme, the main water storage cavity of the main water tank and the sub water storage cavity of the sub water tank are connected through the communication port to realize the same liquid level, and the liquid level probe is installed in the sub water storage cavity, so that the boiling water generated by the heating of the heating body in the main water storage cavity does not flow to the surface of the liquid level probe, the probe identification error is avoided, and the identification accuracy of the liquid level probe is ensured.

[0010] Preferably, the main water tank comprises a tank body, and the main water storage cavity is arranged in the tank body.

[0011] The tank body comprises a top cover and a bottom plate arranged oppositely along the height direction, and a side plate connected between the top cover and the bottom plate, and the top cover, the bottom plate and the side plate surround to form the main water storage cavity.

[0012] The bottom plate is provided with a water inlet, the water inlet pipe is in communication with the water inlet, the side plate is provided with a water outlet, and the water outlet pipe is in communication with the water outlet.

[0013] In the technical scheme, the specific arrangement of the main water tank is improved through the above arrangement.

[0014] Preferably, the hot water tank further comprises a water blocking component, the water blocking component is arranged in the main water storage cavity corresponding to the water inlet and located above the water inlet along the height direction, the orthogonal projection of the water inlet along the height direction is located within the outer periphery of the water blocking component, and a flow guide channel is formed between the water blocking component and the bottom plate and communicates the water inlet and the bottom region.

[0015] In the technical scheme, the water blocking component is arranged to prevent the water from entering the main water storage cavity from the water inlet and being too concentrated to impact upward, slow down the flow rate of the water entering, and avoid the cold water entering the main water storage cavity and the hot water in the main water storage cavity from mixing too fast to cause the water temperature in the main water storage cavity to decrease suddenly.

[0016] Preferably, the water blocking component comprises a water blocking main body and a supporting part, the water blocking main body is arranged along a direction perpendicular to the height direction, the supporting part is arranged along the height direction, one end of the supporting part is connected to one side of the water blocking main body, and the other end of the supporting part is connected to the bottom plate, and the bottom plate, the supporting part and the water blocking main body surround to form the flow guide channel.

[0017] In the technical scheme, the specific arrangement of the water blocking component is improved through the above arrangement.

[0018] Preferably, the hot water tank further comprises a sewage pipe, and the bottom plate is provided with a sewage outlet, and the sewage pipe is in communication with the sewage outlet.

[0019] In the technical scheme, the sewage outlet and the sewage pipe are arranged to drain the sewage in the main water storage cavity and ensure that the water quality in the main water storage cavity is clean.

[0020] Preferably, the hot water tank further comprises an exhaust pipe, the exhaust pipe is inserted into the main water storage cavity, and an air inlet of the exhaust pipe is located at the top region of the main water storage cavity.

[0021] In the technical solution, the exhaust pipe is arranged, and the air inlet of the exhaust pipe is arranged at the top region of the main water storage cavity, so that the hot steam in the main water storage cavity can be exhausted, and the excess water can also be exhausted when the main water storage cavity is full of water, thereby preventing the main water tank from being broken due to pressure.

[0022] Preferably, the number of the liquid level probes is multiple, and the multiple liquid level probes are used to detect water levels at different heights.

[0023] The bottom of the main water tank and the bottom of the auxiliary water tank are flush along the height direction.

[0024] Along the height direction, the highest position of the heating body in the main water storage cavity is lower than the lowest liquid level of the main water storage cavity.

[0025] In the technical solution, the bottom of the main water tank and the bottom of the auxiliary water tank are flush along the height direction, so that the size of the hot water tank in the height direction is more compact.

[0026] Preferably, the hot water tank further comprises a heat preservation shell, and the heat preservation shell is arranged outside the main water tank and the auxiliary water tank.

[0027] In the technical solution, the heat preservation shell is arranged, so that the hot water in the main water tank and the auxiliary water tank can be effectively preserved.

[0028] Preferably, the main water tank comprises a tank body, and the main water storage cavity is arranged in the tank body.

[0029] The main water tank further comprises an extension part, one end of the extension part is connected with the outer wall of the tank body, the other end of the extension part extends outward, and the extension part is arranged in the heat preservation shell.

[0030] In the technical solution, the extension part arranged in the heat preservation shell can better fix the heat preservation shell.

[0031] A water purifier comprises the hot water tank.

[0032] The positive progress effect of the utility model lies in that:

[0033] The utility model discloses a hot water tank, which comprises a main water tank and an auxiliary water tank. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is the three-dimensional structure schematic view of the hot water tank of a preferred embodiment of the utility model.

[0035] Figure 2 It is the three-dimensional structure schematic view of the hot water tank of a preferred embodiment of the utility model.

[0036] Figure 3 It is the three-dimensional structure schematic view of the hot water tank of a preferred embodiment of the utility model.

[0037] Figure 4 It is the three-dimensional structure schematic view of the hot water tank of a preferred embodiment of the utility model.

[0038] Figure 5 It is the three-dimensional structure schematic view of the hot water tank of a preferred embodiment of the utility model.

[0039] Figure 6 It is the three-dimensional structure schematic view of the hot water tank of a preferred embodiment of the utility model.

[0040] Figure 7 It is the three-dimensional structure schematic view of the hot water tank of a preferred embodiment of the utility model.

[0041] Explanation of reference signs

[0042] Hot water tank 1

[0043] Main water tank 10

[0044] Main water storage cavity 11

[0045] Bottom area 111

[0046] Middle area 112

[0047] Top area 113

[0048] Communication port 12

[0049] Tank body 13

[0050] Top cover 131

[0051] Bottom plate 132

[0052] Side plate 133

[0053] Extension part 14

[0054] Fixed part 16

[0055] Sewage outlet 17

[0056] Auxiliary water tank 20

[0057] Auxiliary water storage cavity 21

[0058] water inlet pipe 31

[0059] water outlet pipe 32

[0060] drain pipe 34

[0061] exhaust pipe 35

[0062] air inlet 351

[0063] blind pipe 36

[0064] liquid level probe 40

[0065] high liquid level probe 41

[0066] medium liquid level probe 42

[0067] low liquid level probe 43

[0068] heating body 51

[0069] safety cover 52

[0070] water blocking component 60

[0071] water guiding passage 61

[0072] water blocking main body 62

[0073] supporting part 63

[0074] first temperature controller bracket 71

[0075] second temperature controller bracket 72

[0076] fixing bracket 73

[0077] temperature control probe 80

[0078] heat preservation shell 90

[0079] height direction H DETAILED DESCRIPTION

[0080] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numbers represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application, and all other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative labor fall within the scope of protection of the present application.

[0081] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0082] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0083] As shown in Figures 1 to 7 The utility model provides a hot water tank 1. The hot water tank 1 includes: main water tank 10 and auxiliary water tank 20.

[0084] The main water tank 10 is provided with a main water storage cavity 11, and the main water storage cavity 11 sequentially includes a bottom region 111, a middle region 112 and a top region 113 from bottom to top along the height direction H of the hot water tank 1, a heating body 51 is inserted into the main water storage cavity 11, the heating body 51 is located in the bottom region 111 and / or the middle region 112, the bottom region 111 is communicated with the water inlet pipe 31, and the middle region 112 is communicated with the water outlet pipe 32.

[0085] The auxiliary water tank 20 is arranged on one side of the main water tank 10, and the auxiliary water tank 20 is provided with an auxiliary water storage cavity 21, and the auxiliary water storage cavity 21 is provided with a liquid level probe 40.

[0086] The main water tank 10 is provided with a communication port 12 communicated with the main water storage cavity 11 and the auxiliary water storage cavity 21 on the side close to the auxiliary water tank 20, the communication port 12 is located in the bottom region 111, and the position of the heating body 51 in the main water storage cavity 11 is higher than the position of the communication port 12 along the height direction H.

[0087] In this way, by adding the auxiliary water tank 20, the main storage cavity 11 of the main water tank 10 and the auxiliary storage cavity 21 of the auxiliary water tank 20 are connected through the communication port 12 to have the same liquid level, and the liquid level probe 40 is installed in the auxiliary storage cavity 21, so that the boiling water generated by the heating body 51 in the main storage cavity 11 cannot flow to the surface of the liquid level probe 40, and the identification error of the liquid level probe 40 is avoided, and the identification accuracy of the liquid level probe 40 is ensured. The heating body 51 is located in the bottom region 111 and / or the middle region 112, that is, the heating body 51 can be located in the bottom region 111 and the middle region 112, or the heating body 51 can be located only in the bottom region 111, or the heating body 51 can be located only in the middle region 112.

[0088] Specifically, the main water tank 10 includes a tank body 13, and the main storage cavity 11 is arranged in the tank body 13. The tank body 13 includes a top cover 131 and a bottom plate 132 arranged opposite along the height direction H, and a side plate 133 connected between the top cover 131 and the bottom plate 132, and the top cover 131, the bottom plate 132 and the side plate 133 surround to form the main storage cavity 11. The bottom plate 132 is provided with a water inlet, and the water inlet pipe 31 is communicated with the water inlet. The side plate 133 is provided with a water outlet, and the water outlet pipe 32 is communicated with the water outlet. The water inlet pipe 31 is communicated with the water inlet, that is, the water inlet pipe 31 is communicated with the bottom region 111 of the main storage cavity 11 through the water inlet. The water outlet pipe 32 is communicated with the water outlet, that is, the water outlet pipe 32 is communicated with the middle region 112 of the main storage cavity 11 through the water outlet.

[0089] Preferably, the hot water tank 1 further comprises a water blocking component 60, which is arranged in the main storage cavity 11 corresponding to the water inlet and located above the water inlet along the height direction H. The orthogonal projection of the water inlet along the height direction H is located within the outer periphery of the water blocking component 60, and a flow guide channel 61 is formed between the water blocking component 60 and the bottom plate 132 to communicate the water inlet and the bottom region 111. In this way, by arranging the water blocking component 60, the water entering the main storage cavity 11 from the water inlet is prevented from being too concentrated and upwardly impacting, the flow rate of the water entering is slowed down, and the rapid mixing of the cold water entering the main storage cavity 11 and the hot water in the main storage cavity 11 is avoided, so that the water temperature in the main storage cavity 11 is not suddenly reduced, that is, the cold water is slowly lifted from the bottom of the main storage cavity 11 to lift the hot water, so that the cold water and the hot water are mixed as little as possible, and the influence on the hot water flowing to the water outlet is reduced as much as possible.

[0090] The water blocking component 60 includes a water blocking body 62 and a supporting part 63. The water blocking body 62 is arranged along a direction perpendicular to the height direction H, and the supporting part 63 is arranged along the height direction H. One end of the supporting part 63 is connected to one side of the water blocking body 62, and the other end is connected to the bottom plate 132. The bottom plate 132, the supporting part 63 and the water blocking body 62 surround to form the flow guide channel 61.

[0091] Specifically, the number of the support portions 63 is two, respectively denoted as a first support portion and a second support portion, both of which are arranged along the height direction H, and one end of each of the first support portion and the second support portion is connected to the opposite sides of the water blocking main body 62, and the other end of each of the first support portion and the second support portion is connected to the bottom plate 132, and the bottom plate 132, the first support portion, the water blocking main body 62 and the second support portion together form the flow guide channel 61. However, the number of the support portions 63 is not limited to two, and in other embodiments, the number of the support portions 63 can also be one.

[0092] In the present embodiment, the hot water tank 1 further comprises a blowdown pipe 34, and a blowdown opening 17 is formed in the bottom plate 132, and the blowdown pipe 34 is in communication with the blowdown opening 17. In this way, by arranging the blowdown opening 17 and the blowdown pipe 34, the main water storage cavity 11 can be blown down, so as to ensure the water quality of the main water storage cavity 11.

[0093] The hot water tank 1 further comprises an exhaust pipe 35, the exhaust pipe 35 is inserted into the main water storage cavity 11, and the air inlet 351 of the exhaust pipe 35 is located at the top area 113 of the main water storage cavity 11. In this way, by arranging the exhaust pipe 35 and arranging the air inlet 351 of the exhaust pipe 35 at the top area 113 of the main water storage cavity 11, the hot steam in the main water storage cavity 11 can be discharged, and at the same time, when the main water storage cavity 11 is full of water, the excess water can also be discharged, so as to prevent the main water tank 10 from being broken under pressure.

[0094] In the present embodiment, the number of the liquid level probes 40 is multiple, and the multiple liquid level probes 40 are used to detect different water levels at different heights, so as to detect the water level in the auxiliary water tank 20. In the present embodiment, the liquid level probes 40 are connected to the top wall of the auxiliary water tank 20. In other embodiments, the liquid level probes 40 can also be connected to the side wall of the auxiliary water tank 20, or can be connected to other positions considered appropriate by those skilled in the art.

[0095] It should be noted that when the number of the liquid level probes 40 is multiple, the lowest position of the liquid level probes 40 along the height direction H refers to the lowest position of the liquid level probe 40 among the multiple liquid level probes 40.

[0096] In the present embodiment, the multiple liquid level probes 40 include a high liquid level probe 41, a middle liquid level probe 42 and a low liquid level probe 43, and the three liquid level probes 40 detect different water level heights of the auxiliary water storage cavity 21 of the auxiliary water tank 20, so as to obtain the water level height of the main water tank 10. In other embodiments, only one liquid level probe 40 can also be arranged, or the number of the liquid level probes 40 can be adopted according to other considerations of those skilled in the art.

[0097] The bottoms of the main water tank 10 and the auxiliary water tank 20 are flush along the height direction H. In this way, by arranging the bottoms of the main water tank 10 and the auxiliary water tank 20 to be flush along the height direction H, the size of the hot water tank 1 in the height direction H can be more compact.

[0098] In the height direction H, the highest position of the heating body 51 in the main water storage cavity 11 is lower than the lowest liquid level of the main water storage cavity 11. In this way, by setting the highest position of the heating body 51 in the main water storage cavity 11 in the height direction H to be lower than the lowest liquid level of the main water storage cavity 11, the situation of dry burning caused by no water in the main water storage cavity 11 is prevented.

[0099] The main water tank 10 further comprises a fixing portion 16 located in the main water storage cavity 11 for fixing one end of the air inlet 351 of the exhaust pipe 35. The fixing portion 16 can be installed on the inner wall surface of the top cover 131 of the tank body 13, or on the inner wall surface of the side plate 133 of the tank body 13.

[0100] The side wall of the main water tank 10 is further fixed with a first temperature controller bracket 71, a second temperature controller bracket 72 and a fixing bracket 73. The first temperature controller bracket 71 is used to fix a manual temperature controller (not shown in the figure), and the second temperature controller bracket 72 is used to fix an automatic temperature controller (not shown in the figure). Alternatively, the first temperature controller bracket 71 is used to fix an automatic temperature controller, and the second temperature controller bracket 72 is used to fix a manual temperature controller. The automatic temperature controller is used to adjust the heating temperature of the heating body 51 according to the detected water temperature. The manual temperature controller is used for the user to manually adjust the heating temperature of the heating body 51. The fixing bracket 73 is used to fix the entire hot water tank 1 on the corresponding machine.

[0101] The hot water tank 1 further comprises a temperature control probe 80 installed in the blind pipe 36 inserted into the main water tank 10, which is used to detect the water temperature in the main water tank 10. In the height direction H, the blind pipe 36 is between the heating body 51 and the water outlet.

[0102] The heating body 51 is a heating pipe. The tubular structure can improve the contact area between the heating part and the water, so that the heating effect is better. The shape of the heating pipe is set to a spiral structure to improve the concentrated heating efficiency of the heating pipe. With the same heating effect, the required energy consumption is reduced, the heating power per unit area is small, the noise is smaller, and the user experience is improved.

[0103] A safety cover 52 corresponding to the position of the heating pipe is provided outside the main water tank 10. The safety cover 52 is used to isolate the strong current of the electric heating pipe located outside the main water tank 10.

[0104] Preferably, the hot water tank 1 further comprises a heat preservation shell 90 surrounding the outside of the main water tank 10 and the auxiliary water tank 20. In this way, by setting the heat preservation shell 90, the heat preservation effect on the hot water in the main water tank 10 and the auxiliary water tank 20 can be effectively achieved. It should be noted that in the Figures 4 to 7 In order to better show the structure of the outside of the main water tank 10 and the auxiliary water tank 20, the heat preservation shell 90 is removed.

[0105] The main water tank 10 further comprises an extension part 14, one end of which is connected to the outer wall of the tank body 13 and the other end of which extends outward, and the extension part 14 is inserted into the heat preservation shell 90. In this way, by arranging the extension part 14 which can be arranged in the heat preservation shell 90, the heat preservation shell 90 can be better fixed.

[0106] In the embodiment, the heat preservation shell 90 is polyurethane, but is not limited thereto, and can be other heat preservation materials. The main water tank 10 and the auxiliary water tank 20 are made of stainless steel material to avoid corrosion of the internal water to the main water tank 10 and the auxiliary water tank 20.

[0107] The operation process of the hot water tank 1 in the embodiment is as follows: when the main water tank 10 is filled with water, the temperature decreases, and the heating body 51 is started to heat. When the heating body 51 heats, there is a boiling time, and the boiling water in the main water tank 10 moves upward. However, since the main water tank 10 and the auxiliary water tank 20 are only connected through the communication port 12 in the bottom region 111, the pressure of the boiling water in the main water tank 10 is discharged through the air inlet 351 of the exhaust pipe 35, and the kinetic energy of the hot water flowing into the auxiliary water tank 20 is greatly reduced. In this way, the liquid level probe 40 in the water tank does not appear the phenomenon of boiling water adhesion, and the problem of false reporting of the liquid level height does not occur. Moreover, since the main water storage cavity 11 of the main water tank 10 and the auxiliary water storage cavity 21 of the auxiliary water tank 20 are connected through the communication port 12 to have the same liquid level, the liquid level probe 40 in the auxiliary water storage cavity 21 detects the liquid level in the auxiliary water storage cavity 21, that is, detects the liquid level in the main water storage cavity 11.

[0108] The embodiment further provides a water purifier, which comprises the hot water tank 1 as described above.

[0109] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to the embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A hot water tank characterised in that, The hot water tank comprises: a main water tank, a main water storage cavity is arranged in the main water tank, the main water storage cavity comprises a bottom region, a middle region and a top region from bottom to top along the height direction of the hot water tank, a heating body is arranged in the main water storage cavity, the heating body is arranged in the bottom region and / or the middle region, the bottom region is communicated with a water inlet pipe, and the middle region is communicated with a water outlet pipe; a sub water tank, the sub water tank is arranged on one side of the main water tank, a sub water storage cavity is arranged in the sub water tank, and a liquid level probe is arranged in the sub water storage cavity; wherein a communication port for communicating the main water storage cavity and the sub water storage cavity is arranged on the side of the main water tank close to the sub water tank, the communication port is arranged in the bottom region, and along the height direction, the position of the heating body in the main water storage cavity is higher than the position of the communication port.

2. The hot water tank of claim 1, wherein The main water tank comprises a tank body, and the main water storage cavity is arranged in the tank body; The tank body comprises a top cover and a bottom plate arranged oppositely along the height direction, and a side plate connected between the top cover and the bottom plate, and the top cover, the bottom plate and the side plate surround to form the main water storage cavity; A water inlet is arranged on the bottom plate, the water inlet pipe is communicated with the water inlet, a water outlet is arranged on the side plate, and the water outlet pipe is communicated with the water outlet.

3. The hot water tank of claim 2, wherein The hot water tank further comprises a water blocking component, the water blocking component is arranged in the main water storage cavity corresponding to the water inlet, and is arranged above the water inlet along the height direction, the orthogonal projection of the water inlet along the height direction is located within the outer periphery of the water blocking component, and a flow guide channel for communicating the water inlet and the bottom region is formed between the water blocking component and the bottom plate.

4. The hot water tank of claim 3, wherein The water blocking component comprises a water blocking main body and a supporting part, the water blocking main body is arranged along a direction perpendicular to the height direction, the supporting part is arranged along the height direction, one end of the supporting part is connected to one side of the water blocking main body, and the other end is connected to the bottom plate, and the bottom plate, the supporting part and the water blocking main body surround to form the flow guide channel.

5. The hot water tank of claim 2, wherein The hot water tank further comprises a blowdown pipe, and a blowdown port is arranged on the bottom plate, and the blowdown pipe is communicated with the blowdown port.

6. The hot water tank of claim 1, wherein The hot water tank further comprises an exhaust pipe, the exhaust pipe is arranged in the main water storage cavity, and the air inlet of the exhaust pipe is arranged in the top region of the main water storage cavity.

7. The hot water tank of claim 1, wherein The number of the liquid level probes is multiple, and the multiple liquid level probes are used for detecting water levels at different heights; and / or, The bottoms of the main water tank and the sub water tank are flush along the height direction; and / or, Along the height direction, the highest position of the heating body in the main water storage cavity is lower than the lowest liquid level of the main water storage cavity.

8. The water heater of claim 1 wherein, The hot water tank further comprises a heat preservation shell, and the heat preservation shell surrounds the outside of the main water tank and the sub water tank.

9. The hot water tank of claim 8, wherein, The main water tank comprises a tank body, and the main water storage cavity is arranged in the tank body; The main water tank further comprises an extension part, one end of the extension part is connected to the outer wall of the tank body, and the other end extends outward, and the extension part is arranged in the heat preservation shell.

10. A water purifier characterized by comprising: The hot water tank comprises the hot water tank according to any one of claims 1-9.

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