Heat pump water heater and control method

Abstract

The present application provides a heat pump water heater and a control method. The heat pump water heater includes a head assembly and a water tank assembly with an electric heating device. The head assembly includes: a fan; a housing, provided with a first air inlet and a second air inlet, the first air inlet being provided on the top wall of the housing; a heat pump device including a heat exchanger and a compressor, the heat exchanger and the compressor being provided in the housing, a first air duct being formed between the first air inlet and the heat exchanger, and a second air duct being formed between the second air inlet and the heat exchanger; a control portion including a second control device, the second control device being provided in the first air duct and at least partially located directly below the first air inlet, the second control device being configured to control the electric heating device; wherein the control portion is configured to control the fan, and based on the operation of the electric heating device, the control portion controls the operation of the fan. In this solution, in the electric heating mode, the temperature of the second control device is lower, and the problem of overheating damage will not occur.

Description

Technical Field

[0001] This article relates to electrical equipment technology, particularly a heat pump water heater and a control method. Background Art

[0002] With the development of the economy, people's demand for hot water for bathing has increased, and environmental protection requirements have been improved. Heat pump water heaters are energy-saving water heaters, and their use has gradually expanded with the promotion of environmental protection regulations.

[0003] A heat pump water heater includes a water tank, a heat pump device, two electric heating tubes, and a control device. The control device includes a control box and a control board located within the control box. The control board operates in heat pump mode, heating water via the heat pump device. This mode is energy-efficient, requires a long water heating time, and the water temperature rises slowly. Alternatively, the control board operates in electric heating mode, alternating water heating via two 4.5kW electric heating tubes. This mode shortens the water heating time and increases the water temperature quickly, enabling rapid and continuous hot water output.

[0004] Because the power of the electric heating tube is too large, the relay on the control board used to control the electric heating tube will generate extremely large heat and the temperature will be extremely high. Such continuous long-term operation can easily cause the components on the control board used to control the heat pump device and the relay used to control the electric heating tube to be damaged due to overheating. Summary of the Invention

[0005] The present application provides a heat pump water heater that is less prone to failure.

[0006] The present application also provides a control method for a heat pump water heater.

[0007] The heat pump water heater provided in the present application includes a head assembly and a water tank assembly with an electric heating device, the head assembly including: a fan; a shell, provided with a first air outlet and a second air outlet, the first air outlet being provided on the top wall of the shell; a heat pump device including a heat exchanger and a compressor, the heat exchanger and the compressor being both provided in the shell, a first air duct being formed between the first air outlet and the heat exchanger, and a second air duct being formed between the second air outlet and the heat exchanger; a control part including a second control device, the second control device being provided in the first air duct and at least partially located directly below the first air outlet, the second control device being configured to control the electric heating device; wherein the fan is configured to form a first air beam flowing from one of the first air duct and the second air duct through the heat exchanger to the other of the first air duct and the second air duct, the control part being configured to control the fan, and based on the operation of the electric heating device, the control part controls the operation of the fan.

[0008] In some exemplary embodiments, the second control device includes: a receiving box disposed upright in an up-down direction; and a control board disposed upright inside the receiving box in an up-down direction.

[0009] In some exemplary embodiments, the housing box includes a fireproof box, and the second control device further includes: an insulating bracket fixed in the fireproof box, and the control board is fixed to the insulating bracket and spaced apart from the fireproof box.

[0010] In some exemplary embodiments, the receiving box includes a fireproof box and an insulating box, the insulating box is disposed in the fireproof box, and the control panel is disposed in the insulating box.

[0011] In some exemplary embodiments, the side wall of the storage box is provided with a third air outlet and a fourth air outlet, the control panel is located between the third air outlet and the fourth air outlet, and there is an air outlet gap between the control panel and the storage box, and the air outlet gap connects the third air outlet and the fourth air outlet; based on the operation of the fan, a second air beam is formed inside the storage box, flowing from one of the third air outlet and the fourth air outlet through the air outlet gap to the other of the third air outlet and the fourth air outlet.

[0012] In some exemplary embodiments, a connection terminal is protruded from a side edge of the control board, a wind-passing area is formed between the connection terminal and an end wall of the receiving box, and the wind-passing interval includes the wind-passing area.

[0013] In some exemplary embodiments, the control part further includes a first control device, which is separated from the second control device and is configured to control the heat pump device, and at least one of the first control device and the second control device is configured to control the fan.

[0014] In some exemplary embodiments, the first control device is provided in the first air duct or the second air duct.

[0015] In some exemplary embodiments, the compressor is provided in the first air duct or the second air duct.

[0016] In some exemplary embodiments, the fan is provided in the first air duct or the second air duct.

[0017] In some exemplary embodiments, the electric heating device includes one or more electric heating tubes.

[0018] The control method of the heat pump water heater provided in this application includes:

[0019] Obtaining a first control instruction for operating the electric heating device;

[0020] In response to the first control instruction, the electric heating device is controlled and the fan is controlled.

[0021] In some exemplary embodiments, the step of controlling the electric heating device and the fan includes:

[0022] controlling the operation of the electric heating device, recording the operation time t1 of the electric heating device, and when t1 ≥ the first set time T1, controlling the fan to operate, and then obtaining a second control instruction to stop the operation of the electric heating device;

[0023] In response to the second control instruction, the electric heating device is controlled to stop, the fan is controlled to continue running, the running time t2 of the fan is recorded, and when t2-t1≥time threshold T2, the fan is controlled to stop.

[0024] In some exemplary embodiments, the step of controlling the electric heating device and the fan includes:

[0025] controlling the operation of the electric heating device, recording the operating time t1 of the electric heating device, and when t1 ≥ the first set time T1, controlling the fan and the heat pump device to operate, and then obtaining a second control instruction to stop the operation of the electric heating device;

[0026] In response to the second control instruction, the electric heating device is controlled to stop, the fan and the heat pump device are controlled to continue running, the running time t2 of the fan is recorded, and when t2-t1≥time threshold T2, the fan and the heat pump device are controlled to stop.

[0027] In some exemplary embodiments, the step of controlling the electric heating device and the fan includes:

[0028] controlling the operation of the electric heating device, recording the operating time t1 of the electric heating device, and when t1 ≥ the first set time T1, controlling the fan and the heat pump device to operate, and then obtaining a second control instruction to stop the operation of the electric heating device;

[0029] In response to the second control instruction, the electric heating device and the heat pump device are controlled to stop, the fan is controlled to continue running, the running time t2 of the fan is recorded, and when t2-t1≥time threshold T2, the fan is controlled to stop.

[0030] Compared with the related art, the heat pump water heater provided by this application has a second control device arranged in the first air duct, and the fan is also operated in the electric heating mode. The first air beam will cool the second control device to dissipate heat, thereby reducing the temperature of the second control device. In this way, the second control device is not easily overheated and damaged. Therefore, the heat pump water heater provided by this solution is less likely to malfunction.

[0031] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. Other advantages of the present application can be realized and obtained through the solutions described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0033] Figure 1 A schematic diagram of the three-dimensional structure of a heat pump water heater provided in some embodiments of the present application;

[0034] Figure 2 for Figure 1 The schematic diagram of the cross-sectional top view of the heat pump water heater with the shell removed;

[0035] Figure 3 for Figure 1 The three-dimensional structure diagram of the heat pump water heater with the shell removed is shown;

[0036] Figure 4 for Figure 1 A schematic diagram of an exploded structure of an example of a second control device;

[0037] Figure 5 for Figure 4 A schematic diagram of the structure after the first box body, the second box body, the wire collar and the control board are assembled;

[0038] Figure 6 for Figure 1 A schematic diagram of an exploded structure of another example of the second control device;

[0039] Figure 7 for Figure 6 A schematic diagram of the structure after the first box body, the second box body, the wire collar and the control board are assembled;

[0040] Figure 8 for Figure 1 A schematic diagram of an exploded structure of another example of the second control device;

[0041] Figure 9 for Figure 8A schematic diagram of the structure after the first box body, insulating bracket and control board are assembled;

[0042] Figure 10 for Figure 1 The diagram shows a partial cross-sectional view of the heat pump water heater in a use state, wherein the arrow indicates the flow direction of the first air beam;

[0043] Figure 11 for Figure 1 The cross-sectional structural schematic diagram of the heat pump water heater in another use state is shown, and the arrow indicates the flow direction of the first air beam;

[0044] Figure 12 A flow chart of a control method for a heat pump water heater provided in some embodiments of the present application;

[0045] Figure 13 Flowchart of a control method for a heat pump water heater provided in some other embodiments of the present application;

[0046] Figure 14 A flow chart of a control method for a heat pump water heater provided in some embodiments of the present application;

[0047] Figure 15 This is a flow chart of a control method for a heat pump water heater provided in some further embodiments of the present application.

[0048] in, Figures 1 to 11 The corresponding relationship between the reference numerals and component names is as follows:

[0049] 100 head assembly, 110 fan, 120 housing, 121 first air outlet, 122 second air outlet, 131 heat exchanger, 132 compressor, 140 first control device, 150 second control device, 151 fireproof box, 152 insulation box, 153 control board, 154 insulation bracket, 155 third air outlet, 156 fourth air outlet, 157 terminal block, 158 air flow area, 159 wire collar, 200 water tank assembly, 210 electric heating device, 310 first box body, 320 first box cover, 330 second box body, 340 second box cover. DETAILED DESCRIPTION

[0050] This application describes multiple embodiments, but this description is exemplary rather than restrictive, and it will be apparent to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described herein. Although many possible feature combinations are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0051] This application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive solution defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other inventive solutions to form another unique inventive solution defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the appended claims and their equivalents, the embodiments are not subject to other limitations. In addition, various modifications and changes may be made within the scope of protection of the appended claims.

[0052] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps in the specific order described. As will be understood by those skilled in the art, other orders of steps are also possible. Therefore, the specific order of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can readily understand that these orders can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0053] The heat pump water heater provided by this application is Figures 1 to 3 、 Figure 10 and Figure 11As shown, the head assembly 100 and the water tank assembly 200 with the electric heating device 210 are included. The head assembly 100 includes: a fan 110; a shell 120, the shell 120 is provided with a first air outlet 121 and a second air outlet 122, the first air outlet is provided on the top wall of the shell; a heat pump device including a heat exchanger 131 and a compressor 132, the heat exchanger 131 and the compressor 132 are both provided in the shell 120, a first air duct is formed between the first air outlet 121 and the heat exchanger 131, and a second air duct is formed between the second air outlet 122 and the heat exchanger 131; and a second control device The control part of the device 150 is arranged, and the second control device 150 is arranged in the first air duct and is at least partially located directly below the first air outlet 121. The second control device 150 is arranged to control the electric heating device 210; wherein, the fan 110 is arranged to form a first air beam flowing from one of the first air duct and the second air duct through the heat exchanger 131 to the other of the first air duct and the second air duct. The control part is arranged to control the fan 110 and the heat pump device, and based on the operation of the electric heating device 210, the control part controls the operation of the fan 110 to perform air cooling and heat dissipation on the second control device 150.

[0054] In the heat pump water heater, the second control device 150 is arranged in the first air duct. The electric heating device 10 is operated in the electric heating mode. The fan 110 is also operated in the electric heating mode. The first air beam will cool the second control device 150 to reduce the temperature of the second control device 150. In this way, the second control device 150 is not easily overheated and damaged. Therefore, the heat pump water heater provided by this solution is less likely to malfunction.

[0055] In some examples, the control part also includes a first control device 140, which is separated from the second control device 150 and is configured to control the heat pump device, and at least one of the first control device 140 and the second control device 150 is configured to control the fan 110.

[0056] Since the first control device 140 and the second control device 15 are separated, in the electric heating mode, the heat generated by the second control device 150 is less likely to be transferred to the first control device 140. Therefore, the temperature of the first control device 140 is lower and the problem of overheating damage will not occur. Therefore, the heat pump water heater provided by this solution is less prone to failure.

[0057] like Figure 10 As shown, the fan 110 rotates in the forward direction, and the outside air is blown from the first air outlet 121 through the first air duct, the heat exchanger 131, and the second air duct in sequence, and then blown to the outside from the second air outlet 122. In this process, the first air beam will cool the second control device 150, thereby reducing the temperature of the second control device 150; Figure 11As shown, the fan 110 rotates in the reverse direction, and the outside air flows from the second air outlet 122 through the second air duct, the heat exchanger 131, and the first air duct, and then blows out of the first air outlet 121 to the outside. During this process, the first air beam cools the second control device 150, thereby reducing the temperature of the second control device 150. A wire collar 159 is provided at the bottom of the second control device 150. The head assembly 100 is located above the water tank assembly 200. The electric heating device 210 is led upward and passes through the wire collar 159 to connect to the second control device 150.

[0058] It may be that the first control device 140 is arranged in the first air duct; or it may be that the second control device 150 is arranged in the second air duct; it may be that the compressor 132 is arranged in the first air duct; or it may be that the compressor 132 is arranged in the second air duct; it may be that the fan 110 is arranged in the first air duct; or it may be that the fan 110 is arranged in the second air duct; it may be that the electric heating device 210 includes an electric heating tube; or it may be that the electric heating device 210 includes multiple electric heating tubes, and the multiple electric heating tubes may be two electric heating tubes or three electric heating tubes, etc.; all of the above can achieve the purpose of this application, and its purpose does not deviate from the design idea of the present invention, and will not be repeated here, and should all fall within the scope of protection of this application.

[0059] like Figures 1 to 3 、 Figure 10 and Figure 11 As shown, the following is a detailed description of the technical solution in which the first control device 140 is arranged in the first air duct, the compressor 132 is arranged in the first air duct, the fan 110 is arranged in the second air duct, and the electric heating device 210 includes two electric heating tubes spaced apart in an upper and lower manner.

[0060] In some examples, the second control device 150 includes: a container box vertically disposed in the first air duct; and a control board 153 vertically disposed inside the container box. The control board 153 includes a relay.

[0061] In some embodiments, as Figure 8 and Figure 9 As shown, the accommodating box includes a fireproof box 151, and the second control device 150 also includes: an insulating bracket 154, the insulating bracket 154 is fixed in the fireproof box 151, and the control board 153 is fixed on the insulating bracket 154 and spaced apart from the fireproof box 151 to prevent the strong electricity on the control board 153 from being conducted to the fireproof box 151.

[0062] In this solution, the fireproof box 151 is a sheet metal part, and the insulating box 152 inside the fireproof box 151 is omitted. Since the sheet metal part has good thermal conductivity, the first air beam has a better heat dissipation effect on the control board 153.

[0063] In one embodiment, if Figure 1 、 Figure 2 、 Figure 10 and Figure 11 As shown, the first air vent 121 is provided on the top wall of the housing 120, the second air vent 122 is located on the peripheral wall of the housing 120, the heat exchanger 131 separates the first air vent 121 and the second air vent 122, and the fireproof box 151 is located directly below the first air vent 121. The opposite side walls of the fireproof box 151 are provided with a third air vent and a fourth air vent (not shown in this embodiment). The control board 153 is located between the third and fourth air vents. A wind gap is provided between the control board 153 and the fireproof box 151, and the wind gap connects the third and fourth air vents. The third air vent faces the heat exchanger 131, and the fourth air vent faces away from the heat exchanger 131. When the fan 110 is running in the forward direction, under the action of the first air beam, a second air beam is formed inside the fireproof box 151, flowing from the fourth air outlet through the air gap to the third air outlet. The second air beam blows out of the fireproof box 151 from the third air outlet and removes the heat of the control board 153. Then, it passes through the heat exchanger 131 with the first air beam and is blown to the outside through the second air outlet 122. When the fan 110 is running in the reverse direction, under the action of the first air beam, a second air beam is formed inside the fireproof box 151, flowing from the third air outlet through the air gap to the fourth air outlet. The second air beam blows out of the fireproof box 151 from the fourth air outlet and removes the heat of the control board 153. Then, it blows out of the first air outlet 121 with the first air beam to the outside. This solution has a better heat dissipation effect on the control board 153.

[0064] Furthermore, if Figure 9 As shown, a terminal block 157 is protruding from the side edge of the control panel 153. A draft zone (not shown in this embodiment) is formed between the terminal block 157 and the end wall of the fireproof box 151 (i.e., the end wall of the fireproof box 151 adjacent to the terminal block 157). The draft zone includes a draft zone. Since the heat generated at the terminal block 157 is relatively high, the draft zone can enhance the heat dissipation effect of the terminal block 157. The insulating bracket 154 can include four mounting brackets, which secure the four corners of the control panel, forming a draft zone between adjacent mounting brackets.

[0065] Among them, the third air outlet and the fourth air outlet are both set as grille holes, and one of the third air outlet and the fourth air outlet is set in the middle of one side wall of the fireproof box 151, and the other of the third air outlet and the fourth air outlet is set at a group of relative edges of the other side wall of the fireproof box 151, so that the second air beam has better circulation.

[0066] Furthermore, if Figure 8 As shown, the fireproof box 151 is a split structure, and includes a first box body 310 and a first box cover 320 that are detachably assembled together.

[0067] In other embodiments, Figure 4 and Figure 5 As shown, the housing box includes a fireproof box 151 and an insulating box 152. The insulating box 152 is arranged in the fireproof box 151, and the control board 153 is arranged in the insulating box 152. The insulating box 152 is used to prevent the strong electricity on the control board 153 from being guided to the fireproof box 151. In this solution, the first wind beam cools the fireproof box 151 to reduce the heat of the control board 153.

[0068] Further, if Figure 1 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 10 and Figure 11 As shown, the first air vent 121 is provided on the top wall of the shell 120, the second air vent 122 is located on the peripheral wall of the shell 120, the heat exchanger 131 separates the first air vent 121 and the second air vent 122, the fireproof box 151 is located directly below the first air vent 121, and the opposite side walls of the fireproof box 151 and the opposite side walls of the insulation box 152 are provided with a third air vent 155 and a fourth air vent 156. The two third air vents 155 are located at the control One side of the plate 153 is connected, and the two fourth air vents 156 are located on the other side of the control board 153 and are connected. There is an air gap between the control board 153 and the insulating box 152. The air gap connects the third air vent 155 of the insulating box 152 and the fourth air vent 156 of the insulating box 152. The third air vent 155 of the fireproof box 151 faces the heat exchanger 131, and the fourth air vent 156 of the fireproof box 151 faces away from the heat exchanger 131. The fan 110 is running in the forward direction. Under the action of the first air beam, the interior of the fireproof box 151 forms a second air beam that flows from the fourth air outlet 156 of the fireproof box 151 through the fourth air outlet 156 of the insulation box 152, the air gap, the third air outlet 155 of the insulation box 152, and the third air outlet 155 of the fireproof box 151. The second air beam blows out of the fireproof box 151 from the third air outlet 155 of the fireproof box 151 and takes away the heat of the control board 153. Then, it passes through the heat exchanger 131 with the first air beam and flows out from the second air outlet 122. Blowing to the outside; the fan 110 runs in reverse, and under the action of the first air beam, a second air beam is formed inside the fireproof box 151, which flows from the third air outlet 155 of the fireproof box 151 through the third air outlet 155 of the insulating box 152, the air gap, and the fourth air outlet 156 of the insulating box 152 to the fourth air outlet 156 of the fireproof box 151. The second air beam blows out of the fireproof box 151 from the fourth air outlet 156 of the fireproof box 151 and takes away the heat of the control board 153, and then blows to the outside from the first air outlet 121 along with the first air beam.

[0069] Furthermore, if Figure 6 and Figure 7As shown, a terminal block 157 is protruding from the side edge of the control board 153. A wind-passing area 158 is formed between the terminal block 157 and the end wall of the insulating box 152 (i.e., the end wall of the insulating box 152 adjacent to the terminal block 157). The wind-passing area includes the wind-passing area 158. The heat generated at the terminal block 157 is relatively high, and the wind-passing area 158 can improve the heat dissipation effect of the terminal block 157. The insulating box 152 may have multiple protruding latches inside to fix the edge of the control board, and the wind-passing area 158 is formed between adjacent latches.

[0070] Among them, such as Figure 3 、 Figure 6 and Figure 7 As shown, the third air vent 155 of the fireproof box 151 and the fourth air vent 156 of the fireproof box 151 are both set as grille holes, the third air vent 155 of the insulation box 152 and the fourth air vent 156 of the insulation box 152 are both set as through holes, and one of the third air vent 155 of the fireproof box 151 and the fourth air vent 156 of the fireproof box 151 is set in the middle of one side wall of the fireproof box 151, and the other of the third air vent 155 of the fireproof box 151 and the fourth air vent 156 of the fireproof box 151 is set at a set of opposite edges of the other side wall of the fireproof box 151, and the insulation box 152 is set at the third air vent 155 of the fireproof box 151 and the fourth air vent 156 of the fireproof box 151. One of the third air outlet 155 of the box 152 and the fourth air outlet 156 of the insulating box 152 is arranged in the middle of one side wall of the insulating box 152, and the other of the third air outlet 155 of the insulating box 152 and the fourth air outlet 156 of the insulating box 152 is arranged at a set of opposite edges of the other side wall of the insulating box 152. The third air outlet 155 of the fireproof box 151 and the third air outlet 155 of the insulating box 152 correspond in position, and the fourth air outlet 156 of the fireproof box 151 and the fourth air outlet 156 of the insulating box 152 correspond in position, so that the circulation of the second air beam is better.

[0071] Furthermore, if Figure 6 and Figure 7 As shown, the fireproof box 151 is a split structure and includes a first box body 310 and a first box cover 320 that are detachably assembled together. The insulating box 152 is a split structure and includes a second box body 330 and a second box cover 340 that are detachably assembled together. Alternatively, the first box cover 320 and the second box cover 340 may be assembled together; alternatively, the first box body 310 and the second box body 330 may be assembled together.

[0072] The control method of the heat pump water heater provided by this application is as follows: Figures 12 to 15 Shown, including:

[0073] Obtaining a first control instruction for operating the electric heating device 210;

[0074] In response to the first control instruction, the electric heating device 210 is controlled and the fan 110 is controlled.

[0075] In response to the first control instruction, the electric heating device 210 is controlled to operate, and the fan 110 is controlled to operate. The first air beam will cool the second control device 150 to reduce the temperature of the second control device 150. In this way, the second control device 150 is less likely to be damaged by overheating. Therefore, the heat pump water heater provided by this solution is less likely to malfunction.

[0076] In some examples, such as Figure 12 and Figure 13 As shown, the steps of controlling the electric heating device 210 and the fan 110 include:

[0077] Controlling the operation of the electric heating device 210, recording the operation time t1 of the electric heating device 210, and when t1 ≥ the first set time T1, controlling the fan 110 to operate, and then obtaining a second control instruction to stop the operation of the electric heating device 210;

[0078] In response to the second control instruction, the electric heating device 210 is controlled to stop, the fan 110 is controlled to continue running, the running time t2 of the fan 110 is recorded, and when t2-t1≥time threshold T2, the fan 110 is controlled to stop.

[0079] In the electric heating mode, the fan 110 cools the second control device 150 to reduce the temperature of the second control device 150. The fan 110 can be operated by controlling the fan 110 to rotate forward or reverse.

[0080] In one embodiment, if Figure 10 and Figure 12 As shown, a control method for a heat pump water heater includes:

[0081] Obtaining a first control instruction for operating the electric heating device 210;

[0082] If there is no response to the first control instruction, the step of obtaining the first control instruction for operating the electric heating device 210 is executed;

[0083] In response to the first control instruction, the electric heating device 210 is controlled to operate;

[0084] Recording the operating time t1 of the electric heating device 210 and determining whether the first determination condition t1 ≥ T1 is satisfied;

[0085] Based on the fact that the first determination condition is not satisfied, the step of recording the operating time t1 of the electric heating device 210 and determining whether the first determination condition t1 ≥ T1 is satisfied is executed;

[0086] Based on the first determination condition being met, the fan 110 is controlled to rotate in the forward direction;

[0087] Obtaining a second control instruction to stop the electric heating device 210;

[0088] If there is no response to the second control instruction, executing the step of obtaining the second control instruction to stop the electric heating device 210;

[0089] In response to the second control instruction, the electric heating device 210 is controlled to stop, and the fan 110 is controlled to continue to rotate in the forward direction;

[0090] Recording the running time t2 of the fan 110 continuing to run, and determining whether the second determination condition t2-t1≥T2 is met;

[0091] If the second determination condition is not satisfied, the steps of recording the operating time t2 of the fan 110 continuing to operate and determining whether the second determination condition t2-t1≥T2 is satisfied are performed;

[0092] Based on the second determination condition being met, the fan 110 is controlled to stop, and then the step of obtaining the first control instruction for operating the electric heating device 210 is executed.

[0093] In another embodiment, Figure 11 and Figure 13 As shown, a control method for a heat pump water heater includes:

[0094] Obtaining a first control instruction for operating the electric heating device 210;

[0095] If there is no response to the first control instruction, the step of obtaining the first control instruction for operating the electric heating device 210 is executed;

[0096] In response to the first control instruction, the electric heating device 210 is controlled to operate;

[0097] Recording the operating time t1 of the electric heating device 210 and determining whether the first determination condition t1 ≥ T1 is satisfied;

[0098] Based on the fact that the first determination condition is not satisfied, the step of recording the operating time t1 of the electric heating device 210 and determining whether the first determination condition t1 ≥ T1 is satisfied is executed;

[0099] If the first determination condition is met, the fan 110 is controlled to rotate in the reverse direction;

[0100] Obtaining a second control instruction to stop the electric heating device 210;

[0101] If there is no response to the second control instruction, executing the step of obtaining the second control instruction to stop the electric heating device 210;

[0102] In response to the second control instruction, the electric heating device 210 is controlled to stop, and the fan 110 is controlled to continue to rotate in the reverse direction;

[0103] Recording the running time t2 of the fan 110 continuing to run, and determining whether the second determination condition t2-t1≥T2 is met;

[0104] If the second determination condition is not satisfied, the steps of recording the operating time t2 of the fan 110 continuing to operate and determining whether the second determination condition t2-t1≥T2 is satisfied are performed;

[0105] Based on the second determination condition being met, the fan 110 is controlled to stop, and then the step of obtaining the first control instruction for operating the electric heating device 210 is executed.

[0106] In other examples, such as Figure 14 As shown, the steps of controlling the electric heating device 210 and the fan 110 include:

[0107] Controlling the operation of the electric heating device 210, recording the operation time t1 of the electric heating device 210, and when t1 ≥ the first set time T1, controlling the fan 110 and the heat pump device to operate, and then obtaining a second control instruction to stop the operation of the electric heating device 210;

[0108] In response to the second control instruction, the electric heating device 210 is controlled to stop, and the fan 110 and the heat pump device are controlled to continue running. The running time t2 of the fan 110 is recorded, and when t2-t1≥time threshold T2, the fan 110 and the heat pump device are controlled to stop.

[0109] In the electric heating mode, the second control device 150 is cooled by the fan 110, and the heat pump device is started to allow the heat exchanger 131 to absorb the heat emitted by the second control device 150 to heat the water in the water tank assembly 200, thereby lowering the temperature of the second control device 150.

[0110] Preferably, the fan 110 is configured to rotate in the forward direction, which helps the heat exchanger 131 absorb the heat emitted by the second control device 150 and the compressor 132. Of course, the fan 110 can also be configured to rotate in the reverse direction, which helps improve the heat dissipation effect of the second control device 150.

[0111] In one embodiment, if Figure 10 and Figure 14 As shown, a control method for a heat pump water heater includes:

[0112] Obtaining a first control instruction for operating the electric heating device 210;

[0113] If there is no response to the first control instruction, the step of obtaining the first control instruction for operating the electric heating device 210 is executed;

[0114] In response to the first control instruction, the electric heating device 210 is controlled to operate;

[0115] Recording the operating time t1 of the electric heating device 210 and determining whether the first determination condition t1 ≥ T1 is satisfied;

[0116] Based on the fact that the first determination condition is not satisfied, the step of recording the operating time t1 of the electric heating device 210 and determining whether the first determination condition t1 ≥ T1 is satisfied is executed;

[0117] Based on the first determination condition being met, the fan 110 is controlled to rotate in the forward direction, and the heat pump device is controlled to operate;

[0118] Obtaining a second control instruction to stop the electric heating device 210;

[0119] If there is no response to the second control instruction, executing the step of obtaining the second control instruction to stop the electric heating device 210;

[0120] In response to the second control instruction, the electric heating device 210 is controlled to stop, the fan 110 is controlled to continue to rotate forward, and the heat pump device is controlled to continue to operate;

[0121] Recording the running time t2 of the fan 110 continuing to run, and determining whether the second determination condition t2-t1≥T2 is met;

[0122] If the second determination condition is not satisfied, the steps of recording the operating time t2 of the fan 110 continuing to operate and determining whether the second determination condition t2-t1≥T2 is satisfied are performed;

[0123] Based on the second determination condition being met, the fan 110 and the heat pump device are controlled to stop, and then the step of obtaining the first control instruction for operating the electric heating device 210 is executed.

[0124] In some other examples, such as Figure 15 As shown, the steps of controlling the electric heating device 210 and the fan 110 include:

[0125] Controlling the operation of the electric heating device 210, recording the operation time t1 of the electric heating device 210, and when t1 ≥ the first set time T1, controlling the fan 110 and the heat pump device to operate, and then obtaining a second control instruction to stop the operation of the electric heating device 210;

[0126] In response to the second control instruction, the electric heating device 210 and the heat pump device are controlled to stop, and the fan 110 is controlled to continue running. The running time t2 of the fan 110 is recorded, and when t2-t1≥time threshold T2, the fan 110 is controlled to stop.

[0127] In the electric heating mode, the second control device 150 is cooled by the fan 110, and the heat pump device is started to allow the heat exchanger 131 to absorb the heat emitted by the second control device 150 to heat the water in the water tank assembly 200, thereby lowering the temperature of the second control device 150.

[0128] Preferably, the fan 110 is configured to rotate in the forward direction, which helps the heat exchanger 131 absorb the heat emitted by the second control device 150 and the compressor 132. Of course, the fan 110 can also be configured to rotate in the reverse direction, which helps improve the heat dissipation effect of the second control device 150.

[0129] In one embodiment, if Figure 10 and Figure 15 As shown, a control method for a heat pump water heater includes:

[0130] Obtaining a first control instruction for operating the electric heating device 210;

[0131] If there is no response to the first control instruction, the step of obtaining the first control instruction for operating the electric heating device 210 is executed;

[0132] In response to the first control instruction, the electric heating device 210 is controlled to operate;

[0133] Recording the operating time t1 of the electric heating device 210 and determining whether the first determination condition t1 ≥ T1 is satisfied;

[0134] Based on the fact that the first determination condition is not satisfied, the step of recording the operating time t1 of the electric heating device 210 and determining whether the first determination condition t1 ≥ T1 is satisfied is executed;

[0135] Based on the first determination condition being met, the fan 110 is controlled to rotate in the forward direction, and the heat pump device is controlled to operate;

[0136] Obtaining a second control instruction to stop the electric heating device 210;

[0137] If there is no response to the second control instruction, executing the step of obtaining the second control instruction to stop the electric heating device 210;

[0138] In response to the second control instruction, the electric heating device 210 and the heat pump device are controlled to stop, and the fan 110 is controlled to continue to rotate in the forward direction;

[0139] Recording the running time t2 of the fan 110 continuing to run, and determining whether the second determination condition t2-t1≥T2 is met;

[0140] If the second determination condition is not satisfied, the steps of recording the operating time t2 of the fan 110 continuing to operate and determining whether the second determination condition t2-t1≥T2 is satisfied are performed;

[0141] Based on the second determination condition being met, the fan 110 is controlled to stop, and then the step of obtaining the first control instruction for operating the electric heating device 210 is executed.

[0142] To sum up, in the heat pump water heater provided by the present application, the second control device is arranged in the first air duct, and the fan is also operated in the electric heating mode. The first air beam will cool the second control device to dissipate heat, thereby reducing the temperature of the second control device. In this way, the second control device is not easily overheated and damaged. Therefore, the heat pump water heater provided by this solution is less likely to malfunction.

[0143] In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "relative", "four corners", "periphery", ""mouth"-shaped structure", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0144] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be understood in a broad sense. For example, they may refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" may refer to a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0145] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As is well known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable, and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those skilled in the art that communication media generally embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

Claims

1. A heat pump water heater, characterized in that: The machine head assembly comprises a water tank assembly with an electric heating device, and the machine head assembly comprises: Fan; The housing is provided with a first air outlet and a second air outlet, wherein the first air outlet is provided on the top wall of the housing; A heat pump device comprising a heat exchanger and a compressor, wherein the heat exchanger and the compressor are both disposed in the housing, a first air duct is formed between the first air outlet and the heat exchanger, and a second air duct is formed between the second air outlet and the heat exchanger; a control portion including a second control device, the second control device being disposed in the first air duct and at least partially located directly below the first air outlet, the second control device being configured to control the electric heating device, the control portion further comprising a first control device, the first control device being spaced apart from the second control device and being configured to control the heat pump device; Wherein, the fan is configured to form a first air beam flowing from one of the first air duct and the second air duct through the heat exchanger to the other of the first air duct and the second air duct, the control part is configured to control the fan, and based on the operation of the electric heating device, the control part controls the operation of the fan.

2. The heat pump water heater according to claim 1, characterized in that The second control device includes: A receiving box is vertically arranged in an up-down direction; and The control panel is vertically arranged inside the accommodating box along the up-down direction.

3. The heat pump water heater according to claim 2, characterized in that The housing box includes a fireproof box, and the second control device further includes: The insulating bracket is fixed in the fireproof box. The control panel is fixed on the insulating bracket and spaced apart from the fireproof box.

4. The heat pump water heater according to claim 2, characterized in that: The accommodating box includes a fireproof box and an insulating box. The insulating box is arranged in the fireproof box, and the control panel is arranged in the insulating box.

5. The heat pump water heater according to any one of claims 2 to 4, characterized in that: The side wall of the storage box is provided with a third air outlet and a fourth air outlet, the control panel is located between the third air outlet and the fourth air outlet, and an air passage gap is provided between the control panel and the storage box, the air passage gap communicating with the third air outlet and the fourth air outlet; Based on the operation of the fan, a second air beam is formed inside the storage box, flowing from one of the third air outlet and the fourth air outlet through the air passage gap to the other of the third air outlet and the fourth air outlet.

6. The heat pump water heater according to claim 5, characterized in that A connection terminal is protruded from the side edge of the control board, and a wind-passing area is formed between the connection terminal and the end wall of the accommodating box, and the wind-passing interval includes the wind-passing area.

7. The heat pump water heater according to any one of claims 1 to 4, characterized in that: At least one of the first control device and the second control device is further configured to control the fan, and the first control device is provided in the first air duct or the second air duct; The compressor is arranged in the first air duct or the second air duct; The fan is arranged in the first air duct or the second air duct.

8. The heat pump water heater according to any one of claims 1 to 4, characterized in that: The electric heating device includes one or more electric heating tubes.

9. A control method for a heat pump water heater according to any one of claims 1 to 8, characterized in that: include: Obtaining a first control instruction for operating the electric heating device; In response to the first control instruction, the electric heating device is controlled and the fan is controlled.

10. The control method according to claim 9, characterized in that: The steps of controlling the electric heating device and the fan include: controlling the operation of the electric heating device, recording the operation time t1 of the electric heating device, and when t1 ≥ the first set time T1, controlling the fan to operate, and then obtaining a second control instruction to stop the operation of the electric heating device; In response to the second control instruction, the electric heating device is controlled to stop, the fan is controlled to continue running, the running time t2 of the fan is recorded, and when t2-t1≥time threshold T2, the fan is controlled to stop.

11. The control method according to claim 9, characterized in that: The steps of controlling the electric heating device and the fan include: controlling the operation of the electric heating device, recording the operating time t1 of the electric heating device, and when t1 ≥ the first set time T1, controlling the fan and the heat pump device to operate, and then obtaining a second control instruction to stop the operation of the electric heating device; In response to the second control instruction, the electric heating device is controlled to stop, the fan and the heat pump device are controlled to continue running, the running time t2 of the fan is recorded, and when t2-t1≥time threshold T2, the fan and the heat pump device are controlled to stop.

12. The control method according to claim 9, characterized in that: The steps of controlling the electric heating device and the fan include: controlling the operation of the electric heating device, recording the operating time t1 of the electric heating device, and when t1 ≥ the first set time T1, controlling the fan and the heat pump device to operate, and then obtaining a second control instruction to stop the operation of the electric heating device; In response to the second control instruction, the electric heating device and the heat pump device are controlled to stop, the fan is controlled to continue running, the running time t2 of the fan is recorded, and when t2-t1≥time threshold T2, the fan is controlled to stop.

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