Hot water supply device

Abstract

A hot water supply apparatus includes a housing, a water tank, a main body apparatus, a conduit, a first temperature sensor, an electric heater, and a controller. The pipeline comprises a first coil pipe. The height of the first temperature sensor is a first height. And the height of the electric heater is a second height. The controller is configured to determine a heating time of the electric heater or the first coil. And calculating a preset temperature according to the heating time, the first height and the second height. And according to the water temperature, detected by the first temperature sensor, of the water tank and the heating time, the water temperature change temperature is calculated. And the controller adjusts the running state of the heat pump or determines the running state of the electric heater according to the water temperature change temperature and the preset temperature.

Description

Hot water supply equipment

[0001] This application claims priority to the Chinese patent application with application number 202210917212.0 filed on August 1, 2022; priority to the Chinese patent application with application number 202222010063.8 filed on August 1, 2022; priority to the Chinese patent application with application number 202210918589.8 filed on August 1, 2022; priority to the Chinese patent application with application number 202210937190.4 filed on August 5, 2022, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of household appliances, and in particular to a hot water supply device. Background Art

[0003] Hot water supply equipment uses heat to turn cold water into hot water within a certain period of time. Hot water supply equipment has gradually entered people's lives. Depending on the heat source, hot water supply equipment can be divided into different types, such as heat pump water heaters, electric water heaters, or solar water heaters.

[0004] Summary of the Invention

[0005] A hot water supply device is provided. The hot water supply device includes a housing, a water tank, a main unit, piping, a first temperature sensor, an electric heater, and a controller. The water tank is disposed within the housing. The water tank includes an inner tank. The main unit is disposed within the housing and located above the water tank. The main unit is connected to the water tank and configured to supply water and heat to the water tank. The piping is disposed within the main unit and the water tank, interconnecting the main unit and the water tank. The piping includes a first coil. At least a portion of the first coil is disposed within the inner tank and is connected to a heat pump to supply heat to the water in the water tank. At least a portion of the first temperature sensor is disposed within the inner tank. The first temperature sensor is positioned at a first height. The first temperature sensor is configured to detect the temperature of the water in the water tank. At least a portion of the electric heater is disposed within the inner tank. The electric heater is positioned at a second height. The electric heater is configured to heat the water in the water tank. The controller is coupled to the first temperature sensor. The controller is configured to determine a heating time for the electric heater or the first coil. A preset temperature is calculated based on the heating time, the first height, and the second height. A water temperature change is calculated based on the water temperature of the water tank detected by the first temperature sensor and the heating time. The controller adjusts the operating state of the heat pump or determines the operating state of the electric heater based on the water temperature change and the preset temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. However, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the products involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signals, etc.

[0007] FIG1 is a structural diagram of a hot water supply device according to some embodiments;

[0008] FIG2 is a structural diagram of a hot water supply device without a housing according to some embodiments;

[0009] FIG3 is a structural diagram of a hot water supply device with the housing removed from another perspective according to some embodiments;

[0010] FIG4 is an exploded view of a hot water supply device according to some embodiments;

[0011] FIG5 is an exploded view of a hot water supply device according to some embodiments from another perspective;

[0012] FIG6 is a structural diagram of a second side plate in a housing according to some embodiments;

[0013] FIG7 is a partial enlarged view of the circle A in FIG6 ;

[0014] FIG8 is a partial enlarged view of the circle B in FIG6 ;

[0015] FIG9 is a structural diagram of a first sub-side plate in a housing according to some embodiments;

[0016] FIG10 is a structural diagram of a second sub-side plate in a housing according to some embodiments;

[0017] FIG11 is a structural diagram of a fifth side plate in a housing according to some embodiments;

[0018] FIG12 is a partial enlarged view of circle C in FIG11 ;

[0019] FIG13 is a structural diagram of a water tank in a hot water supply device according to some embodiments;

[0020] FIG14 is a cross-sectional view of FIG13;

[0021] FIG15 is a partial enlarged view of circle D in FIG14 ;

[0022] FIG16 is a structural diagram of a main device of a hot water supply device according to some embodiments;

[0023] FIG17 is a structural diagram of a connecting portion according to some embodiments;

[0024] FIG18 is a structural diagram of a second connecting plate according to some embodiments;

[0025] FIG19 is another structural diagram of a hot water supply device with the housing removed according to some embodiments;

[0026] FIG20 is a partial enlarged view of circle E in FIG19 ;

[0027] FIG21 is a partial enlarged view of circle F in FIG19 ;

[0028] FIG22 is another structural diagram of the hot water supply device of some embodiments with the housing removed;

[0029] FIG23 is a partial enlarged view of circle G in FIG22;

[0030] FIG24 is a structural diagram of a water receiving tray in a hot water supply device according to some embodiments;

[0031] FIG25 is a structural diagram of a water receiving tray in a hot water supply device according to some embodiments from another perspective;

[0032] FIG26 is a rear view of a hot water supply apparatus according to some embodiments;

[0033] FIG27 is a structural diagram of a blocking member in a hot water supply device according to some embodiments;

[0034] FIG28 is a block diagram of a hot water supply apparatus according to some embodiments;

[0035] FIG29 is a structural diagram of a water tank in a hot water supply device according to some embodiments;

[0036] FIG30 is a flow chart of a controller of a hot water supply device according to some embodiments;

[0037] FIG31 is another structural diagram of a hot water supply device according to some embodiments;

[0038] FIG32 is another flow chart of a controller of a hot water supply device according to some embodiments;

[0039] FIG33 is another flow chart of a controller of a hot water supply device according to some embodiments;

[0040] FIG34 is another flow chart of a controller of a hot water supply device according to some embodiments;

[0041] FIG35 is another flow chart of a controller of a hot water supply device according to some embodiments;

[0042] FIG. 36 is yet another flow chart of a controller of a hot water supply device according to some embodiments. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0044] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0045] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0046] When describing some embodiments, the word "connected" and its derivatives may be used. The term "connected" should be understood broadly. For example, "connected" can mean fixed, removable, or integrated; it can be directly connected or indirectly connected through an intermediary. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0047] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0048] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0049] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0050] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0051] As used herein, "parallel," "perpendicular," and "equal" include the stated conditions and conditions approximating the stated conditions within an acceptable range of deviation as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0052] In this document, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., to indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to has a specific orientation, is constructed and operates in a specific orientation, and therefore cannot be understood as limiting the present disclosure.

[0053] For ease of description, the directions of up, down, left, right, front, and back in this disclosure are all based on the state of the hot water supply device when in use. The side of the hot water supply device facing the user when in use is defined as the front side, and the opposite side is defined as the back side.

[0054] Typically, hot water supply equipment stores water in a water tank and heats it using a heating device. During the heating process, some of the water in the tank evaporates, generating steam. As a pressure-bearing component of the hot water supply system, the water in the tank generates more steam when the temperature is high, leading to high pressure and a risk of tank rupture. Current technology employs one or more pressure or temperature sensors on the water tank to monitor the pressure or temperature in real time, generating an alarm when the pressure or temperature is too high, thus preventing rupture. However, pressure or temperature sensors are susceptible to damage, making this solution less reliable. Furthermore, current technology cannot promptly determine whether the water tank is heating at high temperatures. Therefore, heating may not be stopped immediately even when the water reaches a high temperature, potentially leading to rupture and posing a significant safety hazard. Furthermore, users are unable to promptly determine whether the heating device is malfunctioning.

[0055] In order to solve the above problems, some embodiments of the present disclosure provide a hot water supply device 100.

[0056] Figure 1 is a structural diagram of a hot water supply device according to some embodiments. As shown in Figure 1, the hot water supply device 100 includes a main device 1, a water tank 2, a shell 3 and a base 4. The main device 1 is configured to supply heat and water to the water tank 2. The water tank 2 is configured to store water. The shell 3 is arranged on the base 4 and covers the main device 1 and the water tank 2 to limit and protect the main device 1 and the water tank 2. The water tank 2 is arranged on the base 4, and the base 4 can prevent the bottom of the water tank 2 from getting wet. The main device 1 is arranged on the side (upper side) of the water tank 2 away from the base 4, and the main device 1 is connected to the water tank 2. The main device 1 and the water tank 2 are arranged along the first direction respectively to reduce the footprint of the hot water supply device 100.

[0057] It should be noted that the first direction is substantially parallel to the height direction of the hot water supply device 100 (refer to the up-down direction shown in FIG1 ). The main unit 1 is part of an external heating device (such as a heat pump or a solar energy supply device), and the main unit 1 can transfer heat provided by the external heating device to the water tank 2 to heat the water.

[0058] In some embodiments, the housing 3 may be prism-shaped. For example, as shown in FIG1 , the housing 3 may be in the shape of a quadrangular prism, so as to facilitate placement of the hot water supply device 100 .

[0059] Figure 2 is a structural diagram of a hot water supply device with the housing removed according to some embodiments. Figure 3 is a structural diagram of a hot water supply device with the housing removed from another perspective according to some embodiments.

[0060] In some embodiments, as shown in Figures 2 and 3, the hot water supply device 100 also includes a first frame 11. The first frame 11 is located at the outermost side of the main device 1, and the first frame 11 is used to define the shape of the main device 1. The first frame 11 includes a first sub-frame 111 and a second sub-frame 112. For example, as shown in Figures 2 and 3, the first frame 11 includes two first sub-frames 111 and four second sub-frames 112. The two first sub-frames 111 are respectively square-shaped and are respectively arranged on both sides (such as the left and right sides) of the main device 1 in the second direction. The two first sub-frames 111 extend respectively along the first direction. The four second sub-frames 112 are respectively linear and are respectively arranged between the two first sub-frames 111 and extend along the second direction. For example, the two ends of the second sub-frame 112 are respectively connected to the two opposite corners of the two first sub-frames 111. Of the four second sub-frames 112, two are located on the side (front side) of the main unit 1 that is close to the fourth side panel 34 (e.g., the front panel), and one is closer to the base 4 than the other. The other two are located on the side (rear side) of the main unit 1 that is away from the fourth side panel 34, and one is closer to the base 4 than the other. The fourth side panel 34 will be described later. It should be noted that the second direction is substantially parallel to the longitudinal direction of the hot water supply device 100 (referring to the left-right direction shown in FIG. 1 ).

[0061] Figure 4 is an exploded view of a hot water supply device according to some embodiments. Figure 5 is an exploded view of a hot water supply device according to some embodiments from another perspective.

[0062] In some embodiments, as shown in Figures 4 and 5, the housing 3 includes a first side panel 31, a second side panel 32, a third side panel 33, a fourth side panel 34, and a fifth side panel 35. The first side panel 31 is arranged opposite to the base 4 and is parallel to the plane in which the second direction and the third direction are located. The second side panel 32, the third side panel 33, the fourth side panel 34, and the fifth side panel 35 are respectively arranged on the side (lower side) of the first side panel 31 close to the base 4 and are respectively connected to the first side panel 31. The second side panel 32 is arranged opposite to the third side panel 33, and the fourth side panel 34 is arranged opposite to the fifth side panel 35. For example, the second side panel 32 is arranged on the side (right side) of the main unit 1 and the water tank 2 away from the third side panel 33, and the fourth side panel 34 is arranged on the side (front side) of the main unit 1 and the water tank 2 away from the fifth side panel 35. The fifth side panel 35 is used to limit and protect the main unit 1 and the water tank 2. The second side plate 32 , the third side plate 33 , the fourth side plate 34 and the fifth side plate 35 extend along the first direction respectively.

[0063] It should be noted that the third direction is substantially parallel to the width direction of the hot water supply device 100 (refer to the front-to-back direction shown in FIG. 1 ).

[0064] FIG6 is a structural diagram of a second side plate in a housing according to some embodiments.

[0065] 6 , the second side panel 32 includes a second side panel body 320 and a first flange 321 . The first flange 321 is disposed around the second side panel body 320 and extends toward the third side panel 33 .

[0066] In some examples, as shown in FIG6 , the first flange 321 includes a first sub-flange 3211, a second sub-flange 3212, a third sub-flange 3213, and a fourth sub-flange 3214. The first sub-flange 3211 is disposed opposite the second sub-flange 3212. For example, the first sub-flange 3211 is disposed on a side (upper side) of the second side panel body 320 away from the base 4. The third sub-flange 3213 is disposed opposite the fourth sub-flange 3214. For example, the third sub-flange 3213 is disposed on a side (front side) of the second side panel body 320 closer to the fourth side panel 34.

[0067] Figure 7 is a partial enlarged view of the circle A in Figure 6. Figure 8 is a partial enlarged view of the circle B in Figure 6.

[0068] In some embodiments, as shown in Figure 7 , the third sub-flange 3213 has a screw hole and a first connection hole 361. As shown in Figure 8 , the fourth sub-flange 3214 is provided with a first hook set 371. Since the second side panel 32 and the third side panel 33 have the same shape and size, the corresponding portion of the third side panel 33 is also provided with a screw hole, a first connection hole 361, and a first hook set 371.

[0069] In some embodiments, as shown in FIG4 , the fourth side panel 34 includes a first sub-side panel 341 and a second sub-side panel 342. The first sub-side panel 341 is connected to the second sub-side panel 342, and the second sub-side panel 342 is located on a side (lower side) of the first sub-side panel 341 that is closer to the base 4. The first sub-side panel 341 and the second sub-side panel 342 are separate components.

[0070] FIG9 is a structural diagram of a first sub-side plate in a housing according to some embodiments.

[0071] 9 , the first sub-side plate 341 includes a first sub-side plate body 340 and a second flange 343. The second flange 343 surrounds the first sub-side plate body 340 and extends toward the main device 1.

[0072] In some embodiments, as shown in Figure 9, the first sub-side panel 341 also includes a connecting assembly 345, which is arranged on a side (rear side) of the first sub-side panel body 340 close to the main device 1 and is located on a side (upper side) of the first sub-side panel body 340 away from the water tank 2. The first sub-side panel 341 is connected to the first frame 11 through the connecting assembly 345. For example, as shown in Figure 9, the connecting assembly 345 includes a first flat plate 3450 and two second flat plates 3451, and the two second flat plates 3451 are respectively arranged on both sides of the first flat plate 3450. Screw holes are provided on the first flat plate 3450. Among the two second sub-frames 112 located on the front side of the main device 1, a screw hole is provided on the second sub-frame 112 farthest from the water tank 2, which can be matched with the screw hole on the first flat plate 3450 to fix the connecting assembly 345 to the second sub-frame 112 by screws.

[0073] In some embodiments, in the first direction, the height of the first sub-side panel 341 is greater than the height of the first frame 11, so that the connecting assembly 345 can be arranged above the first frame 11. In this way, screws can be inserted through the connecting assembly 345 and the second sub-frame 112 along the first direction to fix the first sub-side panel 341.

[0074] In some embodiments, as shown in FIG9 , the first sub-side panel 341 further includes a viewing window 7 . The viewing window 7 is disposed on and extends through the first sub-side panel body 340 . The viewing window 7 is used to secure a wired controller 6 . For example, as shown in FIG1 , the hot water supply device 100 further includes a wired controller 6 , which is disposed on the viewing window 7 so that the user can view the wired controller 6 through the viewing window 7 . The wired controller 6 is configured to set parameters of the hot water supply device 100 .

[0075] 9 , the first sub-side panel 341 further includes a plug-in portion 344 disposed on the second flange 343. The plug-in portion 344 is located on a side (lower side) of the second flange 343 that is close to the second sub-side panel 342 and protrudes toward the second sub-side panel 342.

[0076] FIG10 is a structural diagram of a second sub-side plate in a housing according to some embodiments.

[0077] In some embodiments, as shown in FIG10 , the second sub-side panel 342 includes a second sub-side panel body 346 and a third flange 347. The third flange 347 is disposed around the second sub-side panel body 346 and extends toward a side (the rear side) proximal to the fifth side panel 35. A second hook set 372 is provided on the third flange 347, and the second hook set 372 is connected (e.g., clipped) to the first connection hole 361 to securely connect the second sub-side panel 342 to the second side panel 32 and the third side panel 33.

[0078] In some embodiments, the third flange 347 has an insertion hole, which is corresponding to the plug-in portion 344 of the first sub-side plate 341. The plug-in portion 344 is plugged into the insertion hole to fix the first sub-side plate 341 and the second sub-side plate 342 together.

[0079] In some embodiments, as shown in Figure 10, the second sub-side panel 342 also includes a mounting piece 348. The mounting piece 348 is arranged on the third flange 347 and is close to the first sub-side panel 341. The mounting piece 348 extends in a direction close to the first sub-side panel 341. Screw holes are provided on the mounting piece 348. The first frame 11 is located on the side (rear side) of the mounting piece 348 close to the main device 1, and the first sub-frame 111 and the second sub-frame 112 are respectively provided with screw holes corresponding to the screw holes of the mounting piece 348. Screws can be passed through the mounting piece 348, the first sub-frame 111 and the second sub-frame 112 to fix the mounting piece 348, the first sub-frame 111 and the second sub-frame 112 in connection.

[0080] In some embodiments of the present disclosure, the provision of a connection assembly 345 and mounting tabs 348 eliminates the need for screw holes on the side of the fourth side panel 34 facing away from the main unit 1 (the front side) or on both sides (the left and right sides) of the fourth side panel 34. This allows the screw holes on the first and second sub-side panels 341, 342 to be obscured after installation, improving the aesthetics of the hot water supply device 100. Furthermore, when the main unit 1 or water tank 2 requires repair, only the first or second sub-side panel 341, 342 need to be removed for maintenance, facilitating inspection of the hot water supply device 100.

[0081] Figure 11 is a structural diagram of a fifth side plate in a housing according to some embodiments. Figure 12 is a partial enlarged view of circle C in Figure 11 .

[0082] In some embodiments, as shown in Figures 11 and 12, the fifth side panel 35 includes a fifth side panel body 350 and a fourth flange 353. The fourth flange 353 is disposed at the edge of the fifth side panel body 350 and extends toward the fourth side panel 34. For example, the fourth flange 353 includes a fifth sub-flange 3521, a sixth sub-flange 3522, and a seventh sub-flange 3523. The fifth sub-flange 3521 is disposed on the side (upper side) of the fifth side panel body 350 away from the base 4, while the sixth sub-flange 3522 and the seventh sub-flange 3523 are disposed opposite each other. For example, the sixth sub-flange 3522 and the seventh sub-flange 3523 are disposed on either side (left and right) of the fifth side panel body 350, respectively. The sixth sub-flange 3522 has a second connection hole 362 for connecting with the first hook set 371. Similarly, the seventh sub-flange 3523 also has a second connection hole 362 for connecting with the first hook set 371 of the third side panel 33.

[0083] In some embodiments, the fifth side plate 35 is connected to the first frame 11. For example, the fifth side plate 35 has screw holes, and the two second sub-frames 112 located on the rear side of the main device 1 have screw holes corresponding to the screw holes in the fifth side plate 35. In this way, the fifth side plate 35 can be fixedly connected to the second sub-frames 112 using screws.

[0084] In some embodiments, the fourth side panel 34 has the same size as the fifth side panel 35. For example, the height of the fourth side panel 34 is the same as the height of the fifth side panel 35, and the width of the fourth side panel 34 is the same as the width of the fifth side panel 35, so as to improve the aesthetics of the hot water supply device 100.

[0085] In some embodiments, the ends of the second side panel 32 , the third side panel 33 , the fourth side panel 34 and the fifth side panel 35 away from the base 4 (such as the upper end) have the same height so that the first side panel 31 is in a horizontal plane, thereby facilitating the installation of the first side panel 31 .

[0086] In some embodiments, the first side panel 31, the second side panel 32, the third side panel 33, the second sub-side panel 342, and the fifth side panel 35 can be sheet metal parts, and the second side panel 32, the third side panel 33, and the second sub-side panel 342 can be painted using a powder coating process so that the second side panel 32, the third side panel 33, and the second sub-side panel 342 have the same color (e.g., white), thereby improving the aesthetics of the hot water supply device 100. It should be noted that the first sub-side panel 341 can be painted using a spray coating process to be a different color (e.g., silver-gray) from the second side panel 32, the third side panel 33, and the second sub-side panel 342, so that the first sub-side panel 341 is more conspicuous, thereby facilitating the user's observation of the wired controller 6.

[0087] In some embodiments, the second side plate 32 , the third side plate 33 , the fourth side plate 34 , and the fifth side plate 35 may be made of steel or other metal materials.

[0088] Figure 13 is a structural diagram of a water tank in a hot water supply device according to some embodiments. Figure 14 is a cross-sectional view of Figure 13. Figure 15 is a partial enlarged view of circle D in Figure 14.

[0089] In some embodiments, as shown in Figures 13 to 15 , the hot water supply device 100 further includes a pipeline 8 . The pipeline 8 is disposed within the main device 1 and the water tank 2 , and the main device 1 and the water tank 2 are connected via the pipeline 8 . The pipeline 8 includes a heating coil 80 , an inlet pipe 83 , and an outlet pipe 84 . The heating coil 80 is configured to transfer heat to the water in the water tank 2 , thereby heating the water. The inlet pipe 83 and the outlet pipe 84 extend from the top of the main device 1 into the water tank 2 . The inlet end of the inlet pipe 83 and the outlet end of the outlet pipe 84 are respectively located above the first side panel 31 . The inlet pipe 83 is configured to deliver water from an external water source to the water tank 2 . The outlet pipe 84 is configured to discharge the water from the water tank 2 . The water flowing out of the outlet pipe 84 can be used for domestic use, swimming pool use, or other purposes. For example, the outlet pipe 84 can be connected to a faucet, floor heating, or shower to meet user needs.

[0090] In some embodiments, as shown in FIG4 , the housing 3 further includes a mounting opening 311. The mounting opening 311 is disposed on the first side panel 31 and is adjacent to the fifth side panel 35. The outlet and inlet ends of the heating coil 80 are respectively disposed through the mounting opening 311, and the outlet and inlet ends of the heating coil 80 extend in a direction away from the water tank 2.

[0091] In some embodiments, as shown in Figure 14, the heating coil 80 includes a first coil 81 and a second coil 82. The first coil 81 is connected to a heat pump located outside the hot water supply device 100, and is configured to supply heat to the water in the water tank 2 to heat the water. The inlet end and the outlet end of the first coil 81 are respectively located on the side (upper side) of the first side plate 31 away from the base 4. The first coil 81 includes a first sub-coil and a second sub-coil. The first sub-coil is arranged in the main body device 1. The second sub-coil is arranged in the water tank 2. The first sub-coil is connected to the second sub-coil. The heat transmitted by the heat pump enters the second sub-coil through the first sub-coil to heat the water in the water tank 2.

[0092] The second coil 82 is connected to a solar energy supply device located outside the hot water supply apparatus 100 and is configured to supply heat to the water in the water tank 2 to heat the water. The inlet and outlet ends of the second coil 82 are respectively located on the upper side of the first side panel 31. The second coil 82 includes a third sub-coil and a fourth sub-coil. The third sub-coil is disposed within the main unit 1. The fourth sub-coil is disposed within the water tank 2 and is connected to the fourth sub-coil. Heat transmitted by the solar energy supply device passes through the third sub-coil and enters the fourth sub-coil to heat the water in the water tank 2.

[0093] In some embodiments, as shown in FIG14 , the hot water supply device 100 further includes an electric heater 85. The electric heater 85 is disposed on the water tank 2, with at least a portion of the electric heater 85 extending into the water tank 2. The electric heater 85 is configured to heat the water in the water tank 2. The electric heater 85 is disposed on a side (upper side) of the second and fourth sub-coils that is away from the base 4 to provide additional heat to the water tank 2.

[0094] The user can select at least one of the solar energy supply device, the heat pump, and the electric heater 85 through the wired controller 6 to heat the water in the water tank 2 according to different situations.

[0095] For example, when the second coil 82 is unable to heat the water in the water tank 2 to the set temperature due to insufficient sunlight, the water in the water tank 2 can be heated by using at least one of the first coil 81 or the electric heater 85 .

[0096] When the heat pump has difficulty heating the water in the water tank 2 to the set temperature due to the low temperature of the external environment or the heat pump is in a frosted state, the water in the water tank 2 can be heated by using at least one of the second coil 82 or the electric heater 85.

[0097] When there is insufficient sunlight and the ambient temperature is low, the water in the water tank 2 can be heated to a set temperature by using the electric heater 85 .

[0098] Of course, the user can also select at least one of the second coil 82, the first coil 81 or the electric heater 85 to heat the required amount of water to the set temperature to meet the heat demand.

[0099] In some embodiments, the first coil 81 has heating and cooling functions. That is, the first coil 81 can heat or cool the water in the water tank 2 to meet the user's needs for hot water and cold water.

[0100] For example, when the first coil 81 serves as the evaporator of the heat pump, the outdoor heat exchanger of the heat pump serves as the condenser. The refrigerant condenses and releases heat in the outdoor heat exchanger of the heat pump. The refrigerant evaporates in the first coil 81 and absorbs heat from the water in the water tank 2 to lower the temperature of the water in the water tank 2, thereby cooling the water in the water tank 2.

[0101] When the first coil 81 serves as the condenser of the heat pump, the outdoor heat exchanger of the heat pump serves as the evaporator. The refrigerant evaporates in the outdoor heat exchanger of the heat pump and absorbs heat from the outdoor environment. The refrigerant condenses in the first coil 81 and releases heat to the water in the water tank 2 to increase the temperature of the water in the water tank 2, thereby heating the water in the water tank 2.

[0102] In some embodiments, the portion of the first coil 81 located in the water tank 2 (the second sub-coil) and the portion of the second coil 82 located in the water tank 2 (the fourth sub-coil) are concentrically or eccentrically arranged. Furthermore, the portions of the first coil 81 and the second coil located in the water tank 2 are located near the bottom of the water tank 2 to disturb the bottom water flow within the water tank 2, thereby enhancing the heat exchange efficiency between the first coil 81 and the second coil 82 and the water.

[0103] It should be noted that the concentric arrangement of the first coil 81 and the second coil 82 may mean that the central axis of the spiral extension trajectory of the first coil 81 coincides with the central axis of the spiral extension trajectory of the second coil 82. The eccentric arrangement of the first coil 81 and the second coil 82 may mean that the central axis of the spiral extension trajectory of the first coil 81 and the central axis of the spiral extension trajectory of the second coil 82 do not coincide. Furthermore, parameters such as the heat exchange area, tube type, and tube length of the first coil 81 and the second coil 82 can be selected based on heating requirements.

[0104] For example, the layout of the first and second coils 81, 82 is determined based on their respective lengths. If the first coil 81 is longer than the second coil 82, the portion of the first coil 81 located within the water tank 2 is located on the side (outside) of the portion of the second coil 82 located within the water tank 2 that is closer to the housing 3. If the second coil 82 is longer than the first coil 81, the portion of the first coil 81 located within the water tank 2 is located on the side (inside) of the portion of the second coil 82 located within the water tank 2 that is farther from the housing 3.

[0105] FIG16 is a structural diagram of a main device of a hot water supply device according to some embodiments.

[0106] In some embodiments, as shown in FIG16 , the hot water supply device 100 further includes a nut 87 and a connecting portion 88 . One end of the nut 87 is connected to one end (the inlet or outlet) of the heating coil 80 , and the other end is connected to the connecting portion 88 . For example, the nut 87 has a threaded hole, and the portion of the heating coil 80 near the nut 87 (e.g., the upper portion of the heating coil) is provided with external threads. This portion is threadedly engaged with the nut 87 .

[0107] FIG. 17 is a structural diagram of a connection portion according to some embodiments.

[0108] In some embodiments, as shown in FIG17 , the connection portion 88 includes a first connection tube 881, a second connection tube 882, and a first connection plate 883. The second connection tube 882 is connected to the first connection tube 881 and is located at one end (the lower end) of the first connection tube 881 that is close to the nut 87. The second connection tube 882 is provided with an external thread, and the second connection tube 882 can be screwed to the nut 87 via the external thread. The first connection plate 883 is provided at the connection between the first connection tube 881 and the second connection tube 882. The first connection plate 883 is provided with a screw hole.

[0109] In some embodiments, the connection portion 88 may be a single piece to reduce water leakage.

[0110] In some embodiments, the outer diameter of the second connecting pipe 882 can be smaller than the inner diameter of the heating coil 80. For example, the outer diameter of the second connecting pipe 882 is smaller than the inner diameters of the first and third sub-coils, so that the second connecting pipe 882 can be inserted into the first and third sub-coils, thereby allowing the liquid in the first and third sub-coils to flow directly into the second connecting pipe 882.

[0111] FIG. 18 is a structural diagram of a second connecting plate according to some embodiments.

[0112] In some embodiments, as shown in Figures 16 and 18, the hot water supply device 100 also includes a second connecting plate 12. The second connecting plate 12 is connected to a portion (such as the top) of the first frame 11 near the first side plate 31, and the second connecting plate 12 includes a third through hole 611. The connecting portion 88 is passed through the third through hole 611 and is fixedly connected to the second connecting plate 12 via the first connecting plate 883. For example, as shown in Figure 18, the second connecting plate 12 includes a first sub-connecting plate 121 and a second sub-connecting plate 122. The first sub-connecting plate 121 is provided with a first sub-through hole 1210, and the second sub-through hole 1220 is provided with a second sub-through hole 1220. One side of the first sub-through hole 1210 and the second sub-through hole 1220 is open, and the opening directions of the first sub-through hole 1210 and the second sub-through hole 1220 are opposite. The first sub-connecting plate 121 and the second sub-connecting plate 122 are plugged together so that the first sub-through hole 1210 and the second sub-through hole 1220 partially overlap, and the overlapping portion forms the third through hole 611. During installation, the connecting portion 88 can be inserted from the open side of the first sub-through hole 1210, and then the first sub-connecting plate 121 and the second sub-connecting plate 122 are plugged together to securely clamp the connecting portion 88 to the second connecting plate 12.

[0113] In some embodiments, the hot water supply device 100 further includes a third connecting pipe. The third connecting pipe is disposed on a side (upper side) of the heating coil 80 away from the base 4. One end of the third connecting pipe is connected to one end of the heating coil 80 (e.g., the outlet or inlet end of the heating coil 80), and the other end is connected to a heat pump or solar energy supply device. For example, the third connecting pipe is connected to the heating coil 80 via a connecting portion 88. In this manner, the hot water supply device 100 can exchange heat with the heat pump or solar energy supply device via the third connecting pipe.

[0114] In some embodiments, the hot water supply device 100 further includes a power cord. The power cord is mounted on the second connecting plate 12. One end of the power cord (the wiring port / outlet) is located above the first side panel 31, and the other end of the power cord extends into the mounting opening 311. The power cord of an external power source is arranged above the hot water supply device 100 and is connected to the one end of the power cord. Because the mounting opening 311 is close to the fifth side panel 35, the power cord of the external power source connected to the power cord can be located on the rear side of the hot water supply device 100.

[0115] Figure 19 is another structural diagram of a hot water supply device with the housing removed according to some embodiments. Figure 20 is a partial enlarged view of circle E in Figure 19. Figure 21 is a partial enlarged view of circle F in Figure 19.

[0116] In some embodiments, as shown in FIG19 , the main device 1 includes an electrical box 89. The electrical box 89 is disposed within the first frame 11 and is close to the fourth side panel 34. Thus, when the fourth side panel 34 is removed, the electrical box 89 can be directly seen.

[0117] In some embodiments, as shown in Figures 19 to 21, the electrical box 89 includes a box body 891, a door body 892, a first rotating shaft 893, and a second rotating shaft 894. The box body 891 can be a sheet metal part, and the side (front side) of the box body 891 near the fourth side panel 34 is open to form a first opening. The door body 892 is arranged on the front side of the box body 891 and is configured to open or close the first opening. The size and shape of the door body 892 match the size and shape of the first opening so that the door body 892 can completely close the first opening. The door body 892 is pivotally connected to the box body 891 via the first rotating shaft 893. For example, one side (such as the left or right side) of the door body 892 is pivotally connected to the box body 891 via the first rotating shaft 893. The second rotating shaft 894 is connected to the first frame 11 and the box body 891 respectively, so that the box body 891 can be pivotally connected to the first frame 11 via the second rotating shaft 894. For example, one side (eg, the left side or the right side) of the box body 891 is pivotally connected to the first frame 11 via a second rotating shaft 894 .

[0118] In some embodiments, the electrical box 89 further includes components. The components are located within the box body 891. When the components are damaged, the components within the box body 891 can be directly replaced or repaired by simply opening the door 892, thereby facilitating the inspection of the electrical box 89.

[0119] Figure 22 is another structural diagram of the hot water supply device of some embodiments with the housing removed. Figure 23 is a partial enlarged view of circle G in Figure 22. It should be noted that in order to show the structure of the rear side of the electrical box 89, Figure 21 removes the electrical box 89.

[0120] In some embodiments, as shown in Figures 22 and 23 , the main device 1 further includes a water pump 13, an electric heating element 14, and an electric three-way valve 15. An installation space is provided on the side (rear side) of the electrical box 89 away from the fourth side panel 34. The water pump 13, the electric heating element 14, and the electric three-way valve 15 are each located within the installation space and adjacent to the electrical box 89.

[0121] When at least one of the water pump 13, the electric heating component 14 and the electric three-way valve 15 is damaged, just remove the first sub-side panel 341 and then rotate the electrical box 89 around the second rotating shaft 894 to directly see the water pump 13, the electric heating component 14 and the electric three-way valve 15, which is convenient for maintenance and replacement of the main unit 1.

[0122] In some embodiments, as shown in FIG14 , the water tank 2 includes an inner liner 21 and a wrapping layer 22 . The inner liner 21 has a cavity 211 therein. The cavity 211 is used to hold water. The wrapping layer 22 is sleeved on the outer side of the inner liner 21 .

[0123] In some embodiments, the inner liner 21 is a single piece. Compared to a split inner liner 21, a single piece inner liner 21 can reduce water leakage, thereby increasing the service life of the inner liner 21.

[0124] In some embodiments, the water tank 2 can be prepared using an integrated foaming process. For example, a second opening is provided at one end of the inner liner 21. The inner liner 21 is placed and fixed so that the end of the inner liner 21 provided with the second opening faces downward. After an isolation bag is sleeved on the outside of the inner liner 21, a foaming mold is sleeved on the outside of the isolation bag to squeeze the isolation bag so that it fits the inner liner 21. Then, a foaming filler is injected into the sealed cavity between the foaming mold and the inner liner 21 sleeved with the isolation bag. The foaming filler foams and solidifies in the sealed cavity to form a wrapping layer 22. After the foaming filler has completed foaming, the wrapping layer 22 is taken out and placed according to the installation position in the hot water supply device 100 to remove the isolation bag in the wrapping layer 22, thereby obtaining the wrapping layer 22.

[0125] In some embodiments, the inner liner 21 includes a first end cap, a second end cap, and a body. The body is connected between the first end cap and the second end cap. The inner liner 21 can be made of stainless steel.

[0126] In some embodiments, the wrapping layer 22 may be made of a polyurethane rigid foam material to keep the inner liner 21 warm, thereby reducing heat exchange between the inner liner 21 and the external environment.

[0127] In some embodiments, the cross-section of the wrapping layer 22 on the horizontal plane may be a polygon (eg, a hexagon) to improve the supporting strength of the wrapping layer 22 .

[0128] In some embodiments, the hot water supply device 100 further includes an anode rod and a first temperature sensor 101 (as shown in FIG14 ). At least one portion of the electric heater 85, at least one portion of the anode rod, and at least one portion of the first temperature sensor 101 respectively extend into the cavity 211 of the inner tank 21. The anode rod is used to prevent water from corroding the inner tank 21. The first temperature sensor 101 is used to detect the water temperature in the water tank 2. It should be noted that the anode rod can be a magnesium rod. Through the principle of electrochemical corrosion protection, the magnesium rod is used as the anode and the metal inner tank (inner tank 21) is used as the cathode, so that the sacrificial anode protects the cathode to protect the metal inner tank.

[0129] In some embodiments, as shown in Figure 19 , the hot water supply device 100 further includes a first mounting hole 612. The first mounting hole 612 is located in the middle of the water tank 2. The electric heater 85 is mounted in the first mounting hole 612, extending along the second direction. For example, as shown in Figure 19 , the water tank 2 further includes a second mounting hole 614 and a third mounting hole 613. The anode rod is mounted in the third mounting hole 613. The first temperature sensor 101 is mounted in the second mounting hole 614. The first mounting hole 612, the second mounting hole 614, and the third mounting hole 613 are arranged sequentially away from the base 4 and extend through the wrapping layer 22 and the inner tank 21 to communicate with the cavity 211. If at least one of the anode rod, the first temperature sensor 101, or the electric heater 85 is damaged, the anode rod, the first temperature sensor 101, and the electric heater 85 can be directly accessed by removing the second sub-side plate 342, thereby facilitating maintenance of the hot water supply device 100.

[0130] In some embodiments, a portion (lower portion) of the water tank 2 located at the front side and close to the base 4 is provided with a sewage outlet, and the sewage outlet is configured to discharge the filtered sewage in the water tank 2.

[0131] In some embodiments, as shown in Figure 13, the hot water supply device 100 further includes a water receiving tray 5. The water receiving tray 5 is disposed between the water tank 2 and the main unit 1 and is connected to both the main unit 1 and the water tank 2. This allows the water tank 2 to support the water receiving tray 5, which in turn supports the main unit 1. This eliminates the need for additional support components between the water tank 2 and the main unit 1, reducing the number of components in the hot water supply device 100 and lowering costs. Furthermore, the water receiving tray 5 is disposed on the side of the wrapping layer 22 away from the base 4 (the upper side), which reduces heat loss from the wrapping layer 22 on its upper side.

[0132] In some embodiments, the water tray 5 includes multiple screw holes. For example, the water tray 5 includes four screw holes, and corresponding screw holes are provided at each end of the two second sub-frames 112 located on the front side of the first frame 11. The four screw holes in the water tray 5 mate with the four screw holes in the first frame 11, so that the first frame 11 is fixedly connected to the water tray 5 via screws.

[0133] Figure 24 is a structural diagram of a water receiving tray in a hot water supply device according to some embodiments. Figure 25 is a structural diagram of a water receiving tray in a hot water supply device according to some embodiments from another perspective. Figure 26 is a rear view of a hot water supply device according to some embodiments.

[0134] In some embodiments, as shown in Figures 24 and 25, the water receiving tray 5 includes a bottom plate 51, a plurality of baffles 52, and a drainage hole 511. The plurality of baffles 52 are arranged around the bottom plate 51, and the plurality of baffles 52 extend in a direction away from the base 4. The drainage hole 511 is provided on the bottom plate 51, and is close to the connection between two adjacent baffles 52. The drainage hole 511 is located at the lowest position of the bottom plate 51. For example, the surface (upper surface) of the bottom plate 51 close to the main device 1 is a slope, and the drainage hole 511 is located at the lowest point of the upper surface of the bottom plate 51, so that the condensed water flows from the upper surface of the bottom plate 51 into the drainage hole 511 and is discharged from the drainage hole 511, which is conducive to draining the condensed water in the water receiving tray 5.

[0135] For example, as shown in FIG26 , the hot water supply device 100 further includes a drain pipe 510, and the housing 3 further includes a fourth mounting hole 615. The fourth mounting hole 615 is provided on the fifth side panel 35 and is located in the middle of the fifth side panel 35 and close to one side (e.g., the left or right side) of the fifth side panel 35. The drain pipe 510 is provided through the fourth mounting hole 615 and is connected to the drain hole 511 to quickly drain the condensed water flowing out of the drain hole 511. In addition, the fourth mounting hole 615 is located near the bottom of the water receiving tray 5. In this way, the condensed water in the water receiving tray 5 can flow out along the drain pipe 510 due to gravity, without the need for an additional water pump for drainage.

[0136] In some embodiments, the upper surface of the bottom plate 51 is an inclined plane.

[0137] In some embodiments, as shown in FIG24 , the water receiving tray 5 includes four baffles 52. In the first direction, the four baffles 52 are higher than the bottom plate 51. In addition, the water receiving tray 5 also includes a plurality of positioning posts 520. The plurality of positioning posts 520 are arranged on a surface (upper surface) of a baffle 52 close to the main device 1, and the plurality of positioning posts 520 are symmetrically arranged. The plurality of positioning posts 520 abut against the outer side of the bottom of the first frame 11 to position the first frame 11, thereby positioning the main device 1, and avoiding positional misalignment between the main device 1 and the water receiving tray 5 during installation.

[0138] In some embodiments, as shown in FIG25 , the water tray 5 further includes reinforcing ribs 53. The reinforcing ribs 53 are provided on the surface (lower surface) of the bottom plate 51 away from the main device 1 and extend away from the main device 1. The reinforcing ribs 53 are plugged into a portion (upper portion) of the wrapping layer 22 that is adjacent to the water tray 5, thereby securing the reinforcing ribs 53 to the wrapping layer 22.

[0139] In some embodiments, as shown in FIG15 , the water tray 5 further includes a groove 50. The groove 50 is disposed on the side (lower side) of the baffle 52 away from the main device 1. For example, as shown in FIG15 , the baffle 52 includes a first sub-baffle 521, a second sub-baffle 522, and a third sub-baffle 523. One end (lower end) of the first sub-baffle 521 is connected to the bottom plate 51, and the other end (upper end) is connected to one end of the second sub-baffle 522. The other end of the second sub-baffle 522 is connected to one end (upper end) of the third sub-baffle 523. The third sub-baffle 523 is located on the side of the first sub-baffle 521 away from the bottom plate 51.

[0140] The portion (upper portion) of the wrapping layer 22 near the water receiving tray 5 protrudes to form a protrusion 220. The protrusion 220 engages with the groove 50 to increase the contact area between the baffle 52 and the wrapping layer 22, thereby improving the support force of the wrapping layer 22 on the baffle 52 and the strength of the baffle 52.

[0141] In some embodiments, in the first direction, the orthographic projection of the bottom plate 51 on the horizontal plane can cover the orthographic projection of the main device 1 on the horizontal plane, so that the condensed water generated by the main device 1 can flow into the bottom plate 51, preventing the condensed water from flowing to the outside of the water receiving tray 5.

[0142] In some embodiments, as shown in FIG24 , the water receiving tray 5 further includes a plurality of second through holes 616 , and the plurality of second through holes 616 are provided on the bottom plate 51 . The inner diameter of the second through hole 616 is greater than or equal to the outer diameter of the pipeline 8 (such as the heating coil 80 , the water inlet pipe 83 , and the water outlet pipe 81 ) so that the pipeline 8 is passed through the second through hole 616 . For example, as shown in FIG24 and FIG25 , the water receiving tray 5 includes six second through holes 616 . Two second through holes 616 are respectively used to install the inlet end and the outlet end of the first coil 81 . Two second through holes 616 are respectively used to install the inlet end and the outlet end of the second coil 82 . Two second through holes 616 are respectively used to install the water inlet pipe 83 and the water outlet pipe 84 . In this way, the heating coil 80 (the first coil 81 and the second coil 82) in the water tank 2 passes through the water receiving tray 5 and is connected to the heating coil 80 in the main device 1, and the water inlet pipe 83 and the water outlet pipe 84 in the water tank 2 pass through the water receiving tray 5 and are connected to the water inlet pipe 83 and the water outlet pipe 84 in the main device 1 respectively.

[0143] In some embodiments, the outer surfaces of the heating coil 80, the water inlet pipe 83, and the water outlet pipe 84 located between the water receiving tray 5 and the inner tank 21 are respectively tightly attached to the wrapping layer 22, and the wrapping layer 22 has a closed-cell structure to prevent condensed water on the pipe 8 from flowing into the wrapping layer 22. The closed-cell structure refers to a structure having multiple spaced-apart cells, and the multiple cells are not connected to each other.

[0144] In some embodiments, as shown in FIG24 , the edge of the second through hole 616 extends away from the water tank 2 to form a fifth flange 363 for positioning the pipe 8. A gap is provided between the pipe 8 and the inner side of the fifth flange 363 to facilitate application of waterproof glue between the fifth flange 363 and the pipe 8, thereby further preventing condensed water on the surface of the pipe 8 above the water receiving tray 5 from flowing through the second through hole 616 into the wrapping layer 22.

[0145] In some embodiments, since the water receiving tray 5 is disposed on the top of the water tank 2 , the power cord of the water tank 2 can pass through the water receiving tray 5 and be connected to the electrical box 89 .

[0146] In some embodiments, as shown in Figure 13, the hot water supply device 100 also includes a safety valve 86. As shown in Figures 24 and 25, the water receiving tray 5 also includes a first through hole 617, and the safety valve 86 is inserted into the first through hole 617. A portion of the safety valve 86 is located on the side (upper side) of the water receiving tray 5 away from the water tank 2, and another portion of the safety valve 86 extends into the cavity 211 of the inner tank 21, and another portion of the safety valve 86 is located on the side of the cavity 211 close to the water receiving tray 5. The safety valve 86 is configured to relieve pressure on the water tank 2. When the pressure in the water tank 2 is too high or the water temperature exceeds a set value, the safety valve 86 can relieve pressure on the water tank 2 to prevent the water tank 2 from exploding due to excessive pressure or temperature. The safety valve 86 is connected to the electrical box 89 so that the electrical box 89 provides electrical energy to the safety valve 86.

[0147] In some embodiments, the safety valve 86 includes a pressure relief port located on the upper side of the water receiving pan 5. When the safety valve 86 releases pressure from the water tank 2, water discharged from the pressure relief port flows onto the bottom plate 51 of the water receiving pan 5 and then drains through the drain hole 511. This eliminates the need for a separate drain pipe for the safety valve 86, saving costs.

[0148] In some embodiments, the hot water supply device 100 further includes a support foot disposed between the inner tank 21 and the base 4 .

[0149] 22 , the hot water supply device 100 further includes a tray 90, which is disposed on a side of the base 4 away from the water tank 2. The tray 90 may be a wooden structure to prevent electric shock accidents caused by water leakage from the water tank 2.

[0150] FIG. 27 is a structural diagram of a blocking member in a hot water supply device according to some embodiments.

[0151] In some embodiments, as shown in Figure 27, the hot water supply device 100 also includes a blocking member 91. The blocking member 91 is provided at the water outlet end of the water inlet pipe 83 in the water tank 2. The blocking member 91 has a cylindrical structure. The end of the blocking member 91 away from the water inlet pipe 83 is closed, and a plurality of water outlet holes 911 are provided on the side of the blocking member 91. Water from an external water source flows into the blocking member 91 from the water inlet pipe 83, and flows into the inner tank 21 from the plurality of water outlet holes 911. In this way, the water can be evenly discharged into the inner tank 21 through the blocking member 91, thereby preventing the water flowing out of the water inlet pipe 83 from directly impacting the top of the water tank 2 and affecting the normal water inlet and outlet in the water tank 2.

[0152] FIG. 28 is a block diagram of a hot water supply apparatus according to some embodiments.

[0153] 28 , the hot water supply device 100 further includes a controller 895 , and the controller 895 is located in the electrical box 89 . The first temperature sensor 101 is coupled to the controller 895 , so that the controller 895 receives the water temperature detected by the first temperature sensor 101 .

[0154] The controller 895 includes a processor. The processor may include a central processing unit (CPU), a microprocessor, or an application specific integrated circuit (ASIC), and may be configured to perform the corresponding operations described in the controller 895 when the processor executes a program stored in a non-transitory computer-readable medium coupled to the controller 895. The non-transitory computer-readable storage medium may include a magnetic storage device (e.g., a hard disk, a floppy disk, or a tape), a smart card, or a flash memory device (e.g., an erasable programmable read-only memory (EPROM), a card, a stick, or a keyboard drive).

[0155] FIG. 29 is a structural diagram of a water tank in a hot water supply device according to some embodiments.

[0156] As shown in Figure 29, the height of the first temperature sensor 101 is a first height H1, the height of the inner tank 21 is a fifth height H5, and the first height H1 is less than or equal to half of the fifth height H5 (H1 ≤ H5 / 2). The height of the electric heater 85 is a second height He, and the second height He is less than or equal to half of the fifth height H5 (He ≤ H5 / 2). For example, the first temperature sensor 101 is located on the side of the electric heater 85 away from the base 4 (the upper side) and in the middle of the water tank 2.

[0157] Figure 30 is a flow chart of a controller of a hot water supply device according to some embodiments. As shown in Figure 30 , when the first coil 81 or the electric heater 85 is heating, the controller 895 is configured to execute steps 11 to 14.

[0158] In step 11 , the controller 895 determines the heating time Δt of the first coil 81 or the electric heater 85 .

[0159] For example, when the first coil 81 heats from a first time t1 to a second time t2, the first heating time Δtr (heating time Δt) of the first coil 81 is the difference between the second time t2 and the first time t1 (Δt = t1 - t2). Alternatively, when the electric heater 85 heats from a third time t3 to a fourth time t4, the second heating time Δtd (heating time Δt) of the electric heater 85 is the difference between the fourth time t4 and the third time t3 (Δtd = t4 - t3). It should be noted that the controller 895 includes a timer configured to measure the heating time of the water tank 2. The timer can be implemented in hardware or software.

[0160] In step 12 , the controller 895 calculates the preset temperature T according to the heating time Δt, the first height H1 , and the second height He.

[0161] The preset temperature T satisfies the following formula (preset function): T=a×△t+b×H1+c×Hd+d; (1)

[0162] Here, the preset distance Hd is the absolute value of the difference between the first height H1 of the first temperature sensor 101 and the second height He of the electric heater 85 (Hd=|H1-He|), that is, the distance between the first temperature sensor 101 and the electric heater 85. a, b, c, and d are preset parameters.

[0163] In step 13 , the controller 895 calculates the water temperature change ΔT based on the water temperature detected by the first temperature sensor 101 and the heating time Δt.

[0164] For example, when the first coil 81 is heated from a first time t1 to a second time t2, the first temperature sensor 101 detects the water temperature as a first water temperature Tr1 at the first time t1 and as a second water temperature Tr2 at the second time t2. The first change value ΔTr (water temperature change ΔT) is the difference between the second water temperature Tr2 and the first water temperature Tr1 (ΔTr = Tr2 - Tr1). Alternatively, when the electric heater 85 is heated from a third time t3 to a fourth time t4, the first temperature sensor 101 detects the water temperature as a third water temperature Td1 at the third time t3 and as a fourth water temperature Td2 at the fourth time t4. The second change value ΔTd (water temperature change ΔT) is the difference between the fourth water temperature Td2 and the third water temperature Td1 (ΔTd = Td2 - Td1).

[0165] In step 14 , the controller 895 adjusts the operating state of the heat pump or determines the operating state of the electric heater 85 according to the water temperature change ΔT and the preset temperature T.

[0166] When the hot water supply device 100 uses a heat pump to heat water, the first coil 81 supplies heat to the water in the water tank 2. The first coil 81 is heated from the first time t1 to the second time t2. The first temperature sensor 101 detects that the water temperature in the water tank 2 is a first water temperature Tr1 at the first time t1 and a second water temperature Tr2 at the second time t2.

[0167] Based on the first time t1 and the second time t2, the controller 895 calculates the first heating time Δtr (heating time Δt) of the first coil 81. The first heating time Δtr is the absolute value of the difference between the second time t2 and the first time t1 (Δtr=|t2-t1|).

[0168] Then, based on the first heating time Δtr, the first height H1, and the second height He, the controller 895 calculates the first preset temperature T0 (preset temperature T). In this case, a=a1, b=b1, c=0, d=c1 in formula (1), and the first preset temperature T0 satisfies the following formula (first preset function): T0=a1×Δtr+b1×H1+c1; (2)

[0169] It should be noted that, since the electric heater 85 is in the off state when the hot water supply device 100 only uses the heat pump to heat water, the parameter of the electric heater 85 (preset distance Hd) in formula (1) does not affect the operation of the hot water supply device 100, that is, c=0.

[0170] Then, the controller 895 calculates a first change value ΔTr based on the first water temperature Tr1 and the second water temperature Tr2. The first change value ΔTr is the absolute value of the difference between the second water temperature Tr2 and the first water temperature Tr1 (ΔTr=|Tr2-Tr1|).

[0171] When the first change value ΔTr is greater than or equal to the first preset temperature T0, the controller 895 determines that the water temperature in the water tank 2 is too high and controls the heat pump to turn off, so that the first coil 81 stops heating the water in the water tank 2. When the first change value ΔTr is less than the first preset temperature T0, the controller 895 determines that the water temperature in the water tank 2 is low and controls the heat pump to turn on, so that the first coil 81 heats the water in the water tank 2.

[0172] It should be noted that since the calculation formula for the first preset temperature T0 (Formula (2)) is a binary function of the first heating time Δtr and the first height H1, the first preset temperature T0 can change with changes in the first heating time Δtr and the first height H1. In this way, when the controller 895 starts and stops the heat pump based on the first change value ΔTr and the first preset temperature T0, it can effectively eliminate the interference of the first heating time Δtr and the first height H1 on the first preset temperature T0, thereby improving the accuracy of calculating the first preset temperature T0.

[0173] When the hot water supply device 100 uses the electric heater 85 to heat water, the electric heater 85 heats the water from the third time t3 to the fourth time t4. The first temperature sensor 101 detects that the water temperature in the water tank 2 is a third water temperature Td1 at the third time t3 and a fourth water temperature Td2 at the fourth time t4.

[0174] Based on the third time t3 and the fourth time t4, the controller 895 calculates the second heating time Δtd (heating time Δt) of the electric heater 85. The second heating time Δtd is the absolute value of the difference between the fourth time t4 and the third time t3 (Δtd=|t4-t3|).

[0175] Then, the controller 895 calculates the second preset temperature Ts (preset temperature T) based on the second heating time Δtd, the first height H1, and the second height He. In this case, a=a2, b=b2, c=c2 in formula (1), and the second preset temperature Ts satisfies the following formula (second preset function): Ts=a2×Δtd+b2×H1+c2×Hd+d; (3)

[0176] Then, the controller 895 calculates a second change value ΔTd based on the third water temperature Td1 and the fourth water temperature Td2. The second change value ΔTd is the absolute value of the difference between the fourth water temperature Td2 and the third water temperature Td1 (ΔTd=|Td2-Td1|).

[0177] When the second change value ΔTd is greater than or equal to the second preset temperature Ts, the controller 895 determines that the electric heater 85 is operating normally. When the second change value ΔTd is less than the second preset temperature Ts, the controller 895 determines that the electric heater 85 is malfunctioning.

[0178] It should be noted that since the calculation formula for the second preset temperature Ts (Formula (3)) is a three-variable function of the second heating time Δtd, the first height H1, and the preset distance Hd, the second preset temperature Ts can change with changes in the second heating time Δtd, the first height H1, and the preset distance Hd. In this way, when the controller 895 determines the operating state of the electric heater 85 based on the second change value ΔTd and the second preset temperature Ts, it can effectively eliminate the interference of the second heating time Δtd, the first height H1, and the preset distance Hd on the second preset temperature Ts, thereby improving the accuracy of calculating the second preset temperature Ts.

[0179] FIG. 31 is another structural diagram of a hot water supply device according to some embodiments.

[0180] As shown in Figure 31, the hot water supply device 100 also includes a relay 106, a first thermostat 104, a second thermostat 105, a second temperature sensor 102, a third temperature sensor 103, a wire 107, a connecting wire 108, and a temperature control switch 898. The relay 106, the first thermostat 104, the second thermostat 105, and the electric heater 85 are connected in series via the wire 107 to form a power circuit. The relay 106, the first thermostat 104, the second thermostat 105, and the temperature control switch 898 are configured to connect or disconnect the power circuit of the electric heater 85. The relay 106, the first thermostat 104, and the second thermostat 105 are disposed within the main unit 1. The first temperature sensor 101, the electric heater 85, the second temperature sensor 102, and the third temperature sensor 103 are each disposed within the water tank 2, with the second temperature sensor 102 and the third temperature sensor 103 disposed between the first temperature sensor 101 and the electric heater 85.

[0181] The second temperature sensor 102, the third temperature sensor 103, and the relay 106 are respectively coupled to the controller 895. The controller 895 is further configured to receive the water temperatures detected by the second temperature sensor 102 and the third temperature sensor 103, and control the relay 106 to connect or disconnect the power circuit of the electric heater 85 to control the electric heater 85 to turn on or off.

[0182] The second temperature sensor 102 and the first thermostat 104 are connected via a connecting line 108. The second temperature sensor 102 absorbs the heat of the water in the water tank 2, and the absorbed heat can be transferred to the first thermostat 104 via the connecting line 108. A first probe is provided in the first thermostat 104, and the first probe is filled with liquid. The liquid has the characteristic of thermal expansion and contraction. The thermal expansion and contraction characteristic may refer to the characteristic that the volume increases with increasing temperature and decreases with decreasing temperature. For example, after absorbing a certain amount of heat, the temperature of the first probe increases, and the liquid in the first probe expands, thereby increasing the volume of the first probe and disconnecting the power circuit of the electric heater 85. After releasing a certain amount of heat, the temperature of the first probe decreases, and the liquid in the first probe contracts, thereby decreasing the volume of the first probe and connecting the power circuit of the electric heater 85.

[0183] The third temperature sensor 103 and the second thermostat 105 are connected via a connecting line 108. After the third temperature sensor 103 absorbs heat from the water in the water tank 2, the absorbed heat can be transferred to the second thermostat 105 via the connecting line 108. A second probe is provided within the second thermostat 105. The second probe is filled with liquid. After absorbing a certain amount of heat, the temperature of the second probe rises, and the liquid within the second probe expands, thereby increasing the volume of the second probe. The power circuit of the electric heater 85 is disconnected. After releasing a certain amount of heat, the temperature of the second probe decreases, and the liquid within the second probe contracts, thereby reducing the volume of the second probe and connecting the power circuit of the electric heater 85.

[0184] In some embodiments, as shown in FIG29 , the height of the second temperature sensor 102 is a third height H2, and the height of the third temperature sensor 103 is a fourth height H3. The second temperature sensor 102 and the third temperature sensor 103 can be at the same height (H2=H3). Of course, in some embodiments, the second temperature sensor 102 and the third temperature sensor 103 can also be at different heights (H2≠H3).

[0185] In some embodiments, the distance between the second temperature sensor 102 and the first temperature sensor 101 is a first distance Hd2, and the distance between the third temperature sensor 103 and the first water temperature sensor 102 is a second distance Hd3. In other words, the difference between the third height H2 of the second temperature sensor 102 and the first height H1 of the first temperature sensor 101 is the first distance Hd2, and the difference between the fourth height H3 of the third temperature sensor 103 and the first height H1 of the first temperature sensor 101 is the second distance Hd3. When the second temperature sensor 102 and the third temperature sensor 103 are at the same height, the first distance Hd2 and the second distance Hd3 are the same.

[0186] In some embodiments, the first distance Hd2 and the second distance Hd3 are respectively smaller than the preset distance Hd.

[0187] 32 is another flow chart of a controller of a hot water supply device according to some embodiments.

[0188] In some embodiments, as shown in FIG32 , when the hot water supply device 100 includes the second temperature sensor 102 and the third temperature sensor 103 , when the hot water supply device 100 uses the electric heater 85 to heat water, the controller 895 is configured to perform steps 21 to 24 .

[0189] In step 21 , the controller 895 calculates a first change temperature of the second temperature sensor 102 within the third heating time Δtp and a second change temperature of the third temperature sensor 103 within the third heating time Δtp.

[0190] The third heating time Δtp is the heating time of the electric heater 85. For example, the electric heater 85 heats from the fifth time t5 to the sixth time t6, and the third heating time is the difference between the sixth time t6 and the fifth time t5.

[0191] The first temperature change is the change in water temperature detected by the second temperature sensor 102 during the third heating time Δtp, and the second temperature change is the change in water temperature detected by the third temperature sensor 103 during the third heating time Δtp. For example, the second temperature sensor 102 detects the water temperature in the water tank 2 as a fifth water temperature Tm1 at the fifth time t5 and as a sixth water temperature Tm2 at the sixth time t6. The third temperature sensor 103 detects the water temperature in the water tank 2 as a seventh water temperature Tn1 at the fifth time t5 and as an eighth water temperature Tn2 at the sixth time t6. The first temperature change is the difference between the sixth water temperature Tm2 and the fifth water temperature Tm1, and the second temperature change is the difference between the eighth water temperature Tn2 and the seventh water temperature Tn1.

[0192] In step 22, the controller 895 determines whether the first change temperature is greater than the third preset temperature Ta, or whether the second change temperature is greater than the fourth preset temperature Tb. If so, the controller 895 executes step 23; if not, the controller 895 executes step 24.

[0193] In step 23 , the controller 895 controls the electric heater 85 to operate normally.

[0194] In step 24 , the controller 895 determines that the electric heater 85 is malfunctioning.

[0195] The third preset temperature Ta and the fourth preset temperature Tb respectively satisfy the following formulas: Ta=a3×△tp+b3×H2+c3×Hd2+d1; (4) Tb=a4×△tp+b4×H3+c4×Hd3+d2; (5)

[0196] Here, a3, b3, c3, a4, b4, c4, d1, and d2 are preset parameters respectively.

[0197] When the first change temperature is greater than or equal to the third preset temperature Ta, and the second change temperature is greater than or equal to the fourth preset temperature Tb, the controller 895 determines that the electric heater 85 is operating normally. When the first change temperature is less than the third preset temperature Ta, or the second change temperature is less than the fourth preset temperature Tb, the controller 895 determines that the electric heater 85 is malfunctioning.

[0198] It should be noted that the second preset temperature Ts is lower than the third preset temperature Ta, and the third preset temperature Ta is lower than the fourth preset temperature Tb.

[0199] In some embodiments, the hot water supply device 100 operates in a first mode and a second mode. In the first mode, the hot water supply device 100 heats the water in the water tank 2 using only the heat pump or the electric heater 85. In the second mode, the hot water supply device 100 heats the water in the water tank 2 using the first coil 81 and the electric heater 85. This second mode allows the water in the water tank 2 to be quickly heated to a high temperature.

[0200] FIG. 33 is yet another flow chart of a controller of a hot water supply device according to some embodiments.

[0201] In some embodiments, as shown in FIG. 33 , when the hot water supply device 100 operates in the first mode, the controller 895 is configured to perform steps 31 to 34 .

[0202] In step 31 , the controller 895 obtains the current water temperature Tp detected by the first temperature sensor 101 .

[0203] In step 32, based on the current water temperature Tp, the controller 895 determines whether the current water temperature Tp is greater than or equal to the first preset water temperature. If so, the controller 895 executes step 33; if not, the controller 895 executes step 34.

[0204] In step 33 , the controller 895 controls the heat pump or the electric heater 85 to turn off to stop heating the water in the water tank 2 .

[0205] In step 34 , the controller 895 controls the heat pump or the electric heater 85 to turn on to heat the water in the water tank 2 .

[0206] The first preset water temperature is the temperature of hot water required by the user, and the first preset water temperature can be set by the controller 895.

[0207] FIG. 34 is yet another flow chart of a controller of a hot water supply device according to some embodiments.

[0208] In some embodiments, as shown in FIG. 34 , when the hot water supply device 100 operates in the second mode, the controller 895 is configured to perform steps 41 to 44 .

[0209] In step 41 , the controller 895 obtains the current water temperature Tp detected by the first temperature sensor 101 .

[0210] In step 42, the controller 895 determines whether the current water temperature Tp is greater than or equal to the first limited water temperature based on the current water temperature Tp detected by the first temperature sensor 101. If so, the controller 895 executes step 43; otherwise, the controller 895 executes step 44.

[0211] In step 43 , the controller controls the relay 106 to disconnect the power circuit of the electric heater 85 and controls the heat pump to turn off.

[0212] In step 44 , the controller controls the relay 106 to connect the power circuit of the electric heater 85 .

[0213] After disconnecting the power circuit of the electric heater 85, the controller 895 issues a fault alarm and controls the heat pump and the electric heater 85 to stop heating. By disconnecting the power circuit of the electric heater 85 when the current water temperature Tp is greater than or equal to the first limit water temperature, the electric heater 85 is protected and safety accidents caused by a failure of the electric heater 85 are avoided.

[0214] It should be noted that the first limited water temperature can be set according to user needs and is less than or equal to the difference between the highest water temperature of the water tank 2 and a fifth threshold. The fifth threshold can be set according to the position of the first temperature sensor 101.

[0215] In some embodiments, when the controller 895 determines that the current water temperature Tp is greater than or equal to the first limited water temperature, and the controller 895 determines that the power circuit of the electric heater 85 is not disconnected, the first thermostat 104 is configured to disconnect the power circuit of the electric heater 85 when the second temperature sensor 102 detects that the first current water temperature Tp1 is greater than or equal to the first set temperature, and to connect the power circuit of the electric heater 85 when the second temperature sensor 102 detects that the first current water temperature Tp1 is less than the first set temperature; and / or, the second thermostat 105 is configured to disconnect the power circuit of the electric heater 85 when the third temperature sensor 103 detects that the second current water temperature Tp2 is greater than or equal to the first set temperature, and to connect the power circuit of the electric heater 85 when the third temperature sensor 103 detects that the second current water temperature Tp2 is less than the first set temperature.

[0216] It should be noted that the controller 895 receives the water temperatures detected by the second temperature sensor 102 and the third temperature sensor 103, and determines the relationship between the current water temperature Tp detected by the second temperature sensor 102 and the third temperature sensor 103 and the first set temperature. When the controller 895 determines that at least one of the first current water temperature Tp1 or the second current water temperature Tp2 is greater than or equal to the first set temperature, the controller 895 generates a fault alarm and controls the heat pump to shut down.

[0217] FIG. 35 is yet another flow chart of a controller of a hot water supply device according to some embodiments.

[0218] In some embodiments, as shown in Figure 35, when the controller 895 determines that the current water temperature Tp is greater than or equal to the first limited water temperature, the second temperature sensor 102 detects that the first current water temperature Tp1 is greater than or equal to the first set temperature, and the controller 895 determines that the power circuit of the electric heater 85 is not disconnected, the controller 895 is also configured to execute steps 51 to 54.

[0219] In step 51 , the controller 895 obtains the second current water temperature Tp2 detected by the third temperature sensor 103 .

[0220] In step 52, the controller 895 determines whether the second current water temperature Tp2 detected by the third temperature sensor 103 is greater than or equal to the second set temperature. If so, the controller 895 executes step 53; if not, the controller 895 executes step 54.

[0221] In step 53 , the controller 895 controls the temperature control switch 898 (such as a bimetallic strip) in the power circuit of the electric heater 85 to be disconnected, so as to cut off the power circuit of the electric heater 85 .

[0222] In step 54 , the controller 895 controls the electric heater 85 to operate normally.

[0223] If the third temperature sensor 103 detects that the second current water temperature Tp2 is greater than or equal to the second set temperature, the controller 895 controls the temperature control switch 898 in the power circuit of the electric heater 85 to disconnect, thereby cutting off the power circuit of the electric heater 85. This prevents the electric heater 85 from heating the gas in the water tank 2 when there is no liquid water in the water tank 2, which could cause excessive pressure in the water tank 2 and damage it. Furthermore, convection heat transfer between the heated gas and the third temperature sensor 103 could also increase the temperature of the third temperature sensor 103, thereby damaging the temperature sensor.

[0224] It should be noted that, as shown in FIG31 , the temperature control switch 898 is provided in the power circuit of the electric heater 85 to connect or disconnect the power circuit of the electric heater 85 .

[0225] After step 53, the controller 895 performs a fault alarm and notifies the personnel to perform maintenance. When the maintenance is completed, the personnel need to manually confirm that the maintenance is completed and turn on the power circuit of the electric heater 85 to restart the electric heater 85.

[0226] It should be noted that a current sensor or a voltage sensor may be provided in the power circuit of the electric heater 85, and the controller 895 may be coupled to the current sensor or the voltage sensor. In this way, the controller 895 can determine whether the power circuit of the electric heater 85 is disconnected based on the current or voltage signal detected by the current sensor or the voltage sensor.

[0227] In some embodiments, the hot water supply device 100 further includes a pressure sensor and a fourth temperature sensor 110 .

[0228] The pressure sensor is disposed at the top of the water tank 2 and is configured to measure the pressure P at the top of the water tank 2. When there is a lot of water vapor at the top of the cavity 211 of the inner tank 21, the pressure sensor can measure the pressure P of the water vapor.

[0229] The fourth temperature sensor 110 is disposed at one end (top) of the water tank 2 near the water tray 5, with at least a portion of the fourth temperature sensor 110 located at the top of the inner tank 21. The fourth temperature sensor 110 is configured to measure the temperature at the top of the cavity 211. When a high amount of water vapor is present at the top of the inner tank 21, the fourth temperature sensor 110 can measure the temperature of the water vapor. The fourth temperature sensor 110 is located at a sixth height H4.

[0230] FIG. 36 is yet another flow chart of a controller of a hot water supply device according to some embodiments.

[0231] In some embodiments, as shown in FIG. 36 , the controller 895 is further configured to perform steps 61 to 64 .

[0232] In step 61 , the controller 895 obtains the temperature detected by the fourth water temperature sensor 110 .

[0233] In step 62, the controller 895 determines whether the temperature detected by the fourth water temperature sensor 110 is greater than or equal to the fifth preset temperature, or whether the pressure value P detected by the pressure sensor is greater than or equal to the preset pressure. If so, the controller 895 executes step 63; if not, the controller 895 executes step 64.

[0234] In step 63 , the safety valve 86 is controlled to open to release the pressure in the water tank 2 .

[0235] In step 64 , the safety valve 86 is controlled to close.

[0236] After step 63 , the controller 895 issues a fault alarm and controls the heat pump and the electric heater 85 to turn off to stop heating.

[0237] In some embodiments, the first distance Hd2 is greater than or equal to a first threshold, and the difference between the fifth height H5 and the sixth height H4 is less than or equal to a second threshold. The first threshold or the second threshold can be determined based on the specific structure of the water tank. Furthermore, the difference between the fifth preset temperature and the second preset temperature is greater than or equal to a third threshold, and the second preset temperature and the first preset temperature are both greater than or equal to a fourth threshold. The third and fourth thresholds can be set based on the corresponding sensor locations.

[0238] It should be noted that the first limited water temperature is lower than the first set temperature, the first set temperature is lower than the second set temperature, and the second set temperature is lower than the fifth preset temperature.

[0239] In addition, since the first temperature sensor 101, the second temperature sensor 102, the third temperature sensor 103, and the fourth temperature sensor 110 are located at different positions of the water tank 2, at the same time, the temperatures detected by the first temperature sensor 101, the second temperature sensor 102, the third temperature sensor 103, and the fourth temperature sensor 110 are different. For example, at the same time, the temperature detected by the fourth temperature sensor 110 is greater than the temperature detected by the third temperature sensor 103, the temperature detected by the third temperature sensor 103 is greater than the temperature detected by the second temperature sensor 102, and the temperature detected by the second temperature sensor 102 is greater than the temperature detected by the first temperature sensor 101.

[0240] Those skilled in the art will understand that the scope of the present invention is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims

1. A hot water supply device, comprising: case; A water tank is disposed in the housing, and the water tank includes an inner tank; a main device, disposed in the housing and located above the water tank, the main device being connected to the water tank and configured to supply water and heat to the water tank; a pipeline, disposed in the main device and the water tank, communicating the main device and the water tank, the pipeline comprising a first coil, at least a portion of the first coil being disposed in the inner tank, and the first coil being connected to a heat pump to supply heat to the water in the water tank; a first temperature sensor, at least a portion of which is disposed in the inner tank, the first temperature sensor being at a first height and configured to detect the water temperature in the water tank; an electric heater, at least a portion of which is disposed in the inner tank, the electric heater having a second height and configured to heat water in the water tank; as well as a controller coupled to the first temperature sensor, the controller being configured to: determining a heating time of the electric heater or the first coil; Calculating a preset temperature according to the heating time, the first height, and the second height; Calculating the water temperature change temperature based on the water temperature detected by the first temperature sensor and the heating time; The controller adjusts the operating state of the heat pump or determines the operating state of the electric heater according to the water temperature change temperature and the preset temperature.

2. The hot water supply device according to claim 1, wherein: The preset temperature is a preset function of the heating time, the first height, and a preset distance, and the preset distance is an absolute value of a difference between the first height and the second height.

3. The hot water supply device according to claim 2, wherein: When the first coil supplies heat to the water tank, the heating time is a first heating time, the water temperature change is equal to a first change value of the water temperature in the water tank during the first heating time, the preset temperature is a first preset temperature, and the first preset temperature is a first preset function of the first heating time and the first height. The controller is configured as follows: If the first change value is greater than or equal to the first preset temperature, determining that the water temperature in the water tank is high and controlling the heat pump to be turned off; If the first change value is less than the first preset temperature, it is determined that the water temperature in the water tank is low and the heat pump is controlled to start.

4. The hot water supply device according to claim 3, wherein: When the first coil is heated from a first time to a second time, the first heating time is the absolute value of the difference between the second time and the first time; The water temperature detected by the first temperature sensor at the first time is a first water temperature, the water temperature detected at the second time is a second water temperature, and the first change value is an absolute value of a difference between the second water temperature and the first water temperature.

5. The hot water supply device according to claim 2, wherein: When the electric heater is running, the heating time is a second heating time, the water temperature change is a second change value of the water temperature of the water tank within the second heating time, the preset temperature is a second preset temperature, and the second preset temperature is a second preset function of the second heating time, the first height, and the preset distance, and the controller is configured as follows: If the second change value is greater than or equal to the second preset temperature, it is determined that the electric heater is operating normally; If the second change value is less than the second preset temperature, it is determined that the electric heater is faulty.

6. The hot water supply device according to claim 5, wherein: When the electric heater heats from the third time to the fourth time, the second heating time is the absolute value of the difference between the fourth time and the third time; The water temperature detected by the first temperature sensor at the third time is a third water temperature, the water temperature detected at the fourth time is a fourth water temperature, and the second change value is the absolute value of the difference between the fourth water temperature and the third water temperature.

7. The hot water supply device according to claim 6, further comprising: a second temperature sensor disposed in the water tank and coupled to the controller, the second temperature sensor being at a third height and configured to detect a water temperature in the water tank; as well as a third temperature sensor, disposed in the water tank and coupled to the controller, the height of the third temperature sensor being a fourth height, and the third temperature sensor being configured to detect the water temperature of the water tank; A difference between the third height of the second temperature sensor and the first height of the first temperature sensor is a first distance, a difference between the fourth height of the third temperature sensor and the first height of the first temperature sensor is a second distance, and the first distance is equal to the second distance.

8. The hot water supply device according to claim 7, wherein: The controller is configured to: calculating a first changed temperature of the second temperature sensor within a third heating time and a second changed temperature of the third temperature sensor within the third heating time; If it is determined that the first changed temperature is lower than the third preset temperature, or the second changed temperature is lower than the fourth preset temperature, it is determined that the electric heater is faulty; If it is determined that the first change temperature is greater than or equal to the third preset temperature, and the second change temperature is greater than or equal to the fourth preset temperature, it is determined that the electric heater is operating normally; wherein, The third preset temperature is the change value of the water temperature detected by the second temperature sensor during the third heating time, and the fourth preset temperature is the change value of the water temperature detected by the third temperature sensor during the third heating time. The second preset temperature is lower than the third preset temperature, and the third preset temperature is lower than the fourth preset temperature.

9. The hot water supply device according to claim 8, wherein: The third preset temperature is a ternary function of the third heating time, the third height, and the first distance, and the fourth preset temperature is a ternary function of the third heating time, the fourth height, and the second distance.

10. The hot water supply device according to claim 7, wherein: The first distance is smaller than the preset distance and is greater than or equal to a first threshold, and the second distance is smaller than the preset distance.

11. The hot water supply device according to claim 1, wherein: When the first coil or the electric heater supplies heat to the water tank, the controller is configured to: If the current water temperature in the water tank detected by the first temperature sensor is lower than a first preset water temperature, controlling the electric heater or the first coil to supply heat to the water tank to heat the water in the water tank; If the current water temperature in the water tank detected by the first temperature sensor is greater than or equal to the first preset water temperature, the electric heater or the first coil is controlled to stop supplying heat to the water tank.

12. The hot water supply device according to claim 1, further comprising: a relay, provided in the main device, configured to control the on / off of a power supply circuit of the electric heater; A first thermostat, provided in the main device, wherein the first thermostat is configured to control the on / off of a power supply circuit of the electric heater; a second thermostat, provided in the main device, the second thermostat being configured to control the on / off of a power supply circuit of the electric heater, the relay, the first thermostat, the second thermostat, and the electric heater being connected in series via wires to form the power supply circuit of the electric heater; a second temperature sensor disposed in the water tank and connected to the first thermostat via a connecting line, the second temperature sensor being coupled to the controller and configured to detect a water temperature in the water tank and transfer heat of the water in the water tank to the first thermostat via the connecting line; as well as a third temperature sensor disposed in the water tank and connected to the second thermostat via the connecting line, the third temperature sensor being coupled to the controller and configured to detect the water temperature of the water tank and transfer heat of the water in the water tank to the second thermostat via the connecting line; in When the first coil and the electric heater jointly supply heat to the water tank, the first temperature sensor detects the current water temperature in the water tank, and the controller is configured to: If the current water temperature is lower than a first limit water temperature, controlling the relay to connect the power supply circuit of the electric heater; If the current water temperature is greater than or equal to the first limited water temperature, the relay is controlled to disconnect the power circuit of the electric heater, and the heat pump is controlled to be turned off to stop heating the water in the water tank.

13. The hot water supply device according to claim 12, wherein: The hot water supply equipment meets at least one of the following requirements: When the current water temperature is greater than or equal to the first limited water temperature, and the controller determines that the power circuit of the electric heater is not disconnected, the first thermostat is configured to: If the first current water temperature detected by the second temperature sensor is lower than the first set temperature, connecting the power circuit of the electric heater; If the first current water temperature detected by the second temperature sensor is greater than or equal to the first set temperature, disconnecting the power circuit of the electric heater; or, When the current water temperature is greater than or equal to the first limited water temperature, and the controller determines that the power circuit of the electric heater is not disconnected, the second thermostat is configured to: If the second current water temperature detected by the third temperature sensor is lower than the first set temperature, connecting the power circuit of the electric heater; If the second current water temperature detected by the third temperature sensor is greater than or equal to the first set temperature, the power circuit of the electric heater is disconnected.

14. The hot water supply device according to claim 13, further comprising a temperature control switch, wherein the temperature control switch is provided in the power circuit of the electric heater and is configured to connect or disconnect the power circuit of the electric heater, wherein: When the second temperature sensor detects that the first current water temperature is greater than or equal to the first set temperature, and the controller determines that the power circuit of the electric heater is not disconnected, the controller is further configured to: If the second current water temperature detected by the third temperature sensor is greater than or equal to the second set temperature, controlling the temperature control switch to be turned off to cut off the power circuit of the electric heater; If the second current water temperature detected by the third temperature sensor is lower than the second set temperature, the electric heater is controlled to operate normally.

15. The hot water supply device according to claim 14, wherein: The inner tank is provided with a cavity, and the hot water supply device further comprises: a safety valve, located on a side of the water tank close to the main device, with another portion of the safety valve extending into the cavity and located on a side of the cavity close to the water receiving tray, the safety valve being configured to relieve pressure in the water tank; a fourth temperature sensor configured to detect a temperature of a portion of the cavity close to the main device; and a pressure sensor configured to detect the pressure inside the water tank; The controller is configured to: If the temperature detected by the fourth temperature sensor is greater than or equal to a fifth preset temperature, or the pressure value detected by the pressure sensor is greater than or equal to a preset pressure, the safety valve is controlled to open to relieve the pressure of the water tank.

16. The hot water supply device according to claim 15, wherein: The height of the inner container is a fifth height, the height of the fourth temperature sensor is a sixth height, and a difference between the fifth height and the sixth height is less than or equal to a second threshold.

17. The hot water supply device according to claim 15, wherein: The first limited water temperature is lower than the first set temperature, the first set temperature is lower than the second set temperature, and the second set temperature is lower than the fifth preset temperature.

18. The hot water supply device according to claim 17, wherein: The difference between the fifth preset temperature and the second preset temperature is greater than or equal to a third threshold, and the second preset temperature and the first preset temperature are respectively greater than or equal to a fourth threshold.

19. The hot water supply device according to any one of claims 12 to 18, wherein: The first limited water temperature is less than or equal to the difference between the maximum water temperature of the water tank and a fifth threshold.

20. The hot water supply device according to any one of claims 1 to 19, wherein: The height of the inner container is the fifth height, the first height is less than or equal to half of the fifth height, and the second height is less than or equal to half of the fifth height.

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