Heat pump water heater and machine head assembly thereof

Abstract

The utility model discloses a heat pump water heater and a machine head assembly thereof, the machine head assembly comprises a shell, a fan box, an evaporator and an electric control box, a mounting cavity is arranged in the shell, and the shell is provided with an air inlet used for communicating the mounting cavity with the outside; the fan box is arranged in the mounting cavity and divides the mounting cavity into a first cavity body and a second cavity body which are spaced, and the air inlet is formed in the cavity wall, away from the fan box, of the first cavity body; the evaporator is arranged in the first cavity and located between the air inlet and the fan box. And the electric control box is arranged in the second cavity and is arranged on the fan box. The heat pump water heater comprises the machine head assembly. According to the technical scheme, the technical problem that an existing heat pump water heater is low in energy efficiency is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, and more specifically, to a heat pump water heater and a head assembly thereof. Background Art

[0002] Heat pump water heater is a kind of high-efficiency, energy-saving and environmentally friendly hot water supply equipment, which is suitable for various occasions such as homes, hotels, swimming pools, factories, etc. It can provide users with economical and sustainable hot water solutions, especially in occasions where a large amount of hot water is required. The use of heat pump water heater can significantly reduce energy consumption and operating costs.

[0003] At present, the head of the heat pump water heater is limited by its structural layout, which makes the energy efficiency of the heat pump water heater not ideal and there are certain safety hazards. Utility Model Content

[0004] The embodiment of the utility model provides a head assembly, which can increase the air intake volume and thus improve energy efficiency.

[0005] The embodiment of the utility model also provides a heat pump water heater.

[0006] The head assembly provided by the embodiment of the utility model includes:

[0007] A housing, wherein a mounting cavity is provided in the housing, and the housing is provided with an air inlet for connecting the mounting cavity with the outside;

[0008] A fan box, the fan box is arranged in the installation cavity and is arranged to divide the installation cavity into a first cavity and a second cavity that are spaced apart from each other, and the air inlet is arranged on a cavity wall of the first cavity away from the fan box;

[0009] an evaporator, the evaporator being disposed in the first cavity and between the air inlet and the fan box;

[0010] An electric control box is arranged in the second cavity and on the fan box.

[0011] In some exemplary embodiments, the evaporator is configured to be arc-shaped or bent, and the end surface of the fan box close to the first cavity is configured to match and fit with the end surface of the evaporator close to the fan box.

[0012] In some exemplary embodiments, the evaporator includes a plurality of heat exchange tubes interconnected with each other, the plurality of heat exchange tubes are stacked, and each heat exchange tube includes a plurality of main bodies arranged side by side and a plurality of U-shaped parts connecting two adjacent main bodies;

[0013] At least one of the main bodies includes a first straight portion, a connecting portion, and a second straight portion connected in sequence, the first straight portion is located on a side of the second straight portion away from the electric control box, and the first straight portion and the second straight portion are arranged at an angle.

[0014] In some exemplary embodiments, a cavity wall of the first cavity is provided with a mounting hole, the axis of the mounting hole is arranged to coincide with the axis of the housing, and the mounting hole is arranged on a side of the evaporator away from the fan box;

[0015] The minimum distance between the edge of the mounting hole and the evaporator is set to be no less than 45 mm.

[0016] In some exemplary embodiments, an angle between the first straight portion and the second straight portion is set to 115° to 145°.

[0017] In some exemplary embodiments, the connecting portion is configured to be in an arc shape, and an axis of the connecting portion is configured to coincide with an axis of the housing.

[0018] In some exemplary embodiments, a heat sink for dissipating heat from the electric control box is further included. A fan cavity is provided in the fan box. The heat sink is disposed in the fan cavity and is connected to the electric control box.

[0019] In some exemplary embodiments, the housing includes a water receiving tray, an outer frame and a top cover, the top cover and the water receiving tray are arranged at intervals in a first direction, the outer frame is located between the water receiving tray and the top cover and forms a ring, and the heat sink is arranged on one side of the fan cavity close to the top cover.

[0020] In some exemplary embodiments, a sealing ring is further included, the fan box is provided with a heat dissipation hole connecting the fan cavity and the first cavity, the heat sink is configured to close the heat dissipation hole, and the sealing ring is disposed between the heat sink and the hole wall of the heat dissipation hole.

[0021] In some exemplary embodiments, in the circumference of the housing, the cavity wall of the installation cavity includes a first opening area;

[0022] The air inlet includes a plurality of first openings, the first openings are arranged in the first opening area, and the central angle of the first opening area is set to 80° to 120°.

[0023] In some exemplary embodiments, a fan is further included, wherein an axis of the fan is arranged to intersect with an axis of the housing;

[0024] The center line of the electric control box is set to extend along the radial direction of the housing, and the angle between the axis of the fan and the center line of the electric control box is set to be 80° to 100°.

[0025] The heat pump water heater provided in the embodiment of the utility model comprises the above-mentioned head assembly.

[0026] The heat pump water heater and its head assembly of the embodiment of the utility model separate the air inlet and the electric control box by the fan box, so that the air inlet is no longer affected by the position of the electric control box, the air inlet can be enlarged, the air intake volume can be increased, and the energy efficiency can be improved. At the same time, rainwater entering the installation cavity with the outside wind will not directly contact the electric control box, which can improve the safety of use and make the heat pump water heater suitable for more scenes. The evaporator is bent, which can avoid the installation hole, and the gap between the evaporator and the installation hole is larger, which is conducive to the disassembly and assembly of the magnesium rod in the later stage. The bent evaporator has a larger air inlet area of ​​the evaporator, and when using heat exchange tubes of similar length, the number of layers of the heat exchange tubes is less, and the resistance of the evaporator to the wind flowing into the fan box is smaller, which can improve the heat exchange effect and improve the energy efficiency. The heat sink of the electric control box can be cooled by the cold air passing through the evaporator, which improves the heat dissipation effect, and the heat of the heat sink is also recycled. The electric control box is directly fixed on the fan box, which is simpler and more stable to install, and the bracket for fixing the electric control box is omitted.

[0027] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model 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 utility model and do not constitute a limitation on the technical solution of the utility model.

[0029] Figure 1 is a schematic diagram of a head assembly of the present exemplary embodiment;

[0030] Figure 2 for Figure 1 A partial cross-sectional view of the nose assembly in FIG.

[0031] Figure 3 is a schematic diagram of the installation cavity of this exemplary embodiment;

[0032] Figure 4 for Figure 3 Schematic diagram of the evaporator in FIG.

[0033] Figure 5 is a disassembled schematic diagram of a head assembly of the exemplary embodiment;

[0034] Figure 6 is a schematic diagram of installing the electric control box of this exemplary embodiment;

[0035] Figure 7 is a schematic diagram of compressor installation of this exemplary embodiment;

[0036] Figure 8 This is a schematic diagram of installing the air guide ring of this exemplary embodiment;

[0037] Fig. 9 for Figure 6 AA section view;

[0038] Fig.10 for Fig. 9 A local enlarged schematic diagram of point B in the figure.

[0039] Description of reference numerals:

[0040] 10-housing, 101-top cover, 102-outer frame, 103-chassis, 104-display box, 105-water tray, 106-installation hole, 20-air inlet, 201-first opening, 30-heat dissipation element, 40-installation cavity, 401-first cavity, 402-second cavity, 50-evaporator, 501-heat exchange tube, 502-main body, 503-U-shaped portion, 504-first straight line Part, 505-connecting part, 506-second straight part, 60-electric control box, 602-box body, 603-electrical component, 70-fan box, 701-first opening, 702-second opening, 703-first box body, 704-second box body, 705-fan, 706-fan cavity, 707-first side wall, 708-heat dissipation hole, 709-sealing ring, 80-compressor, 90-air guide ring. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in detail in conjunction with the accompanying drawings below. Note that the embodiments can be implemented in multiple different forms. A person of ordinary skill in the art can easily understand the fact that the methods and contents can be transformed into various forms without departing from the purpose and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the contents described in the following embodiments. In the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other.

[0042] In the present specification, ordinal numbers such as “first”, “second” and “third” are provided to avoid confusion among constituent elements, and are not intended to limit the number.

[0043] In this specification, for the sake of convenience, the words and phrases indicating the orientation or positional relationship, such as "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., are used to illustrate the positional relationship of the constituent elements with reference to the drawings. This is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction in which each constituent element is described. Therefore, it is not limited to the words and phrases described in the specification, and can be appropriately replaced according to the situation.

[0044] In this specification, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate, or the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0045] In this specification, "electrical connection" includes the case where components are connected together through an element having some electrical function. There is no particular limitation on the "element having some electrical function" as long as it can transmit and receive electrical signals between the connected components. Examples of "element having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having various functions.

[0046] In this specification, "parallel" means a state where the angle formed by two straight lines is greater than -10° and less than 10°, and therefore, also includes a state where the angle is greater than -5° and less than 5°. In addition, "perpendicular" means a state where the angle formed by two straight lines is greater than 80° and less than 100°, and therefore, also includes a state where the angle is greater than 85° and less than 95°.

[0047] The triangles, rectangles, trapezoids, pentagons or hexagons in this specification are not in the strict sense, and may be approximate triangles, rectangles, trapezoids, pentagons or hexagons, etc. There may be some small deformations caused by tolerances, and there may be chamfers, arc edges and deformations.

[0048] The term "about" in the embodiments of the present disclosure means that the limits are not strictly defined and a numerical value within the range of process and measurement errors is allowed.

[0049] Figure 1 is a schematic diagram of a head assembly of this exemplary embodiment, Figure 2 for Figure 1 A partial cross-sectional view of the nose assembly in FIG. Figure 3 is a schematic diagram of the installation cavity of this exemplary embodiment. This exemplary embodiment provides a head assembly, such as Figures 1 to 3 As shown, the head assembly includes a housing 10, a fan box 70 and an evaporator 50 located in the housing 10. The housing 10 encloses a mounting cavity 40, and the housing 10 has an air inlet 20, which can communicate with the outside and the mounting cavity 40. The fan box 70 can be located in the mounting cavity 40, and the fan box 70 is configured to divide the mounting cavity 40 into two cavities, which can be a first cavity 401 and a second cavity 402 separated from each other. The air inlet 20 is located on the cavity wall of the first cavity 401, and is located on the side of the first cavity 401 away from the fan box 70. The evaporator 50 can be located in the first cavity 401, and the evaporator 50 is arranged between the air inlet 20 and the fan box 70. The electric control box 60 can be located in the second cavity 402, so that the electric control box 60 and the air inlet 20 are separated, and the electric control box 60 is installed on the fan box 70. The heat pump water heater and its head assembly in this example separate the air inlet 20 and the electric control box 60 through the fan box 70, so that the air inlet 20 is no longer affected by the position of the electric control box, and the air inlet 20 can be enlarged, the air intake volume can be increased, and the energy efficiency can be improved. At the same time, rainwater entering the installation cavity 40 with the outside wind will not directly contact the electric control box, which can improve the safety of use and make the heat pump water heater suitable for more scenarios.

[0050] In some exemplary embodiments, Figures 1 to 3 As shown, the housing 10 includes a top cover 101, an outer frame 102, and a bottom plate 103 arranged in sequence in a first direction, the bottom plate 103 includes a water receiving tray 105, the first direction is perpendicular to the water receiving tray 105, the water receiving tray 105 is spaced apart from the top cover 101 in the first direction, and the outer frame 102 is sandwiched between the top cover 101 and the bottom plate 103 and connected to the top cover 101 and the bottom plate 103 respectively. The outer frame 102 is in a circular ring shape, and the top cover 101, the outer frame 102, and the water receiving tray 105 form a cylindrical shape, that is, the housing 10 is cylindrical, and the axis of the housing 10 is the axis of the cylinder of the housing 10. The space enclosed by the outer frame 102 constitutes the installation cavity 40.

[0051] In some exemplary embodiments, Figures 1 to 3 As shown, the fan box 70 is installed on the water tray 105, and the fan box 70 is separated from the outer frame 102 at one end in the second direction, and the space between the two forms a first cavity 401; the fan box 70 is separated from the outer frame 102 at one end in the third direction, and the space between the two forms a second cavity 402; the second direction and the third direction intersect and are both perpendicular to the first direction. In this example, the second direction is perpendicular to the third direction. Therefore, the first cavity 401 is located on one side of the fan box 70 in the second direction, and the second cavity 402 is located on one side of the fan box 70 in the third direction. The fan box 70 separates the first cavity 401 and the second cavity 402.

[0052] In some exemplary embodiments, Figures 1 to 3 As shown, the outer frame 102 includes a first opening area K1 and a second opening area K2 along its circumference, which can be understood as the cavity wall of the installation cavity 40 may include a first opening area K1 and a second opening area K2 in the circumferential direction. A plurality of first openings 201 are provided in the first opening area K1, and the plurality of first openings 201 are evenly distributed in the first opening area K1, and the plurality of first openings 201 constitute the air inlet 20. In this example, the first opening 201 is an oblong hole, but is not limited thereto. For example, the first opening 201 may be a circular hole, a rectangular hole, an elliptical hole, a diamond hole or a fan-shaped hole, etc. The second opening area K2 may be provided with a second opening (not shown in the figure), and the second opening serves as an air outlet. As a result, the airflow can enter the installation cavity 40 from the air inlet 20 as shown by the dotted arrow, and then flow out of the installation cavity 40 through the air outlet.

[0053] Figure 4 for Figure 3 Schematic diagram of an evaporator in FIG. 1 , in some exemplary embodiments, as shown in FIG. Figures 2 to 4 As shown, the evaporator 50 is erected on the water receiving tray 105 and is installed on the water receiving tray 105 through a fixing assembly. The evaporator 50 is bent, which is different from the related flat plate structure. The evaporator 50 includes a plurality of heat exchange tubes 501, and the plurality of heat exchange tubes 501 are arranged to be interconnected, and the plurality of heat exchange tubes 501 are arranged in layers. Each heat exchange tube 501 includes a plurality of main bodies 502 and a plurality of U-shaped parts 503. The plurality of main bodies 502 are arranged side by side in the first direction, and any two adjacent main bodies 502 are connected through the U-shaped parts 503. At least one main body 502 includes a first straight part 504, a second straight part 506, and a connecting part 505. The two ends of the second straight part 506 are respectively connected to one end of the first straight part 504 and one end of the second straight part 506. The first straight part 504 is inclined relative to the second straight part 506, that is, the two are arranged at an angle, so that. The evaporator 50 of this example is bent, so that the heat exchange area of ​​the evaporator 50 is larger and the energy efficiency is high.

[0054] In some exemplary embodiments, Figure 3 and Figure 4 As shown, the angle between the first straight portion 504 and the second straight portion 506 can be α, wherein the angle value of α can be 115° to 145°. By adjusting the size of the angle α, it can be ensured that the connecting portion 505 can withstand the tensile stress during the bending process, thereby ensuring the strength and service life of the evaporator 50.

[0055] In some exemplary embodiments, Figure 3 and Figure 4As shown, the connecting portion 505 is arc-shaped. By setting the connecting portion 505 to be arc-shaped, the air inlet surface of the evaporator 50 can be enlarged, and the airflow is uniform, so that the evaporator 50 has a higher energy efficiency. In some exemplary embodiments, the axis of the arc formed by the connecting portion 505 coincides with the axis of the outer frame 102, and the center angle corresponding to the arc formed by the connecting portion 505 can be 110° to 130°. If the center angle corresponding to the arc formed by the connecting portion 505 is too large, the overall length of the evaporator 50 will be larger and more volume will be required. If the center angle corresponding to the arc formed by the connecting portion 505 is too small, the heat exchange area of ​​the evaporator 50 will increase only slightly, and it will be unfavorable for heat exchange.

[0056] In some exemplary embodiments, the connection portion 505 may also be in a bent shape, for example, the connection portion 505 may be in a wave shape or a broken line shape. The wave-shaped connection portion 505 increases the heat exchange area of ​​the evaporator 50 and improves the energy efficiency.

[0057] In some exemplary embodiments, Figure 3 and Figure 4 As shown, the bent evaporator 50 of this example includes at least two layers of heat exchange tubes 501. Compared with the existing flat-plate structure evaporator 50, under the premise that the length of the heat exchange tubes 501 is similar, the number of layers of the heat exchange tubes 501 is less, and the evaporator 50 has less resistance to the wind flowing into the fan box 70, which can improve the heat exchange effect and improve energy efficiency.

[0058] Figure 5 FIG. 1 is a schematic diagram of a disassembled head assembly of the exemplary embodiment. In some exemplary embodiments, as shown in FIG. Figures 3 to 5 As shown, the fan box 70 is a hollow structure, and the fan box 70 is provided with a first opening 701 and a second opening 702 at both ends of the second direction, respectively, so that the fan box 70 is open at both ends of the second direction, so that the airflow can pass through the fan box 70. The end surface of the fan box 70 with the first opening 70 can match the bending shape of the evaporator 50 to form a V-shape, so that the evaporator 50 is in the first cavity 401 and can be attached to the end surface of the fan box 70 with the first opening 701, and the airflow can enter the fan box 70 only after passing through the evaporator 50. The fan box 70 includes a first box body 703 and a second box body 704 as an integrated piece, the second box body 704 is at one end of the first box body 703 in the third direction, the second box body 704 protrudes from one side of the first box body 703 in the second direction and is close to the outer frame 102, so that the fan box 70 of this example is different from the rectangular shape of the existing fan box 70 and is of a special shape.

[0059] In some exemplary embodiments, Figures 3 to 5As shown, the first straight portion 504 of the evaporator 50 is perpendicular to the second direction, and the first straight portion 504 of the evaporator 50 is attached to the first box body 703 of the fan box 70; the second straight portion 506 of the evaporator 50 is attached to the second box body 704 of the fan box 70, and the second straight portion 506 is located on the side of the first straight portion 504 close to the electric control box 60. The size of the above-mentioned angle α also affects the shape of the fan box 70 whose shape matches the evaporator 50. A suitable angle α can make the fan box 70 form a first cavity 401 that is sufficient to accommodate the electric control box 60. When installing the evaporator 50 and the fan box 70, the fan box 70 can be fixed first, and then the posture of the evaporator 50 can be adjusted, and then the evaporator 50 can be translated toward the fan box 70 along the second direction until the evaporator 50 moves to the first opening 701 of the fan box 70, and then the evaporator 50 is fixed.

[0060] In some exemplary embodiments, Figure 2 and Figure 3 As shown, the first opening area K1 is a part of the cavity wall of the first cavity 401, so that the airflow entering from the first opening area K1 directly flows into the first cavity 401. In this example, the center angle corresponding to the first opening area K1 can be 80° to 120°, and the center angle of the opening area of ​​the existing head assembly is about 80° or less. The arrangement of the first opening area K1 in this example can increase the air intake area by about, and the air intake volume can be increased by more than 13%.

[0061] Figure 6 FIG. 1 is a schematic diagram of installing the electric control box of the exemplary embodiment. In some exemplary embodiments, as shown in FIG. Figures 1 to 6 As shown, the electric control box 60 can be directly fixed on the fan box 70 by fasteners, eliminating the bracket for fixing the electric control box 60 on the water receiving tray 105, making the structure more compact and saving a certain amount of space. The electric control box 60 may include a box body and electrical components located in the box body, and the fan box 70 includes a first side wall 707 at one end of the fan box 70 in the third direction. The electric control box 60 is fixed on the first side wall 707, and the first side wall 707 may be provided with at least one positioning structure for positioning the electric control box 60. In addition, the outer frame 102 is provided with an opening corresponding to the electric control box 60 and has a detachable display box 104. The display box 104 can cover the opening corresponding to the electric control box 60. By removing the display box 104, the electric control box 60 can be exposed, which is convenient for subsequent repair and maintenance. The first opening area K1 and the electric control box 60 are blocked by the fan box 70, and the electric control box 60 is located on the leeward side of the fan box 70.

[0062] In some exemplary embodiments, Figures 1 to 5As shown, a mounting hole 106 is provided on the water receiving tray 105, and the mounting hole 106 is located on the cavity wall of the first cavity 401, and is used for positioning and mounting a magnesium rod (not shown in the figure). The mounting hole 106 can be a circular hole and is centrally arranged on the water receiving tray 105, so that the axis of the mounting hole 106 coincides with the axis of the housing 10. The mounting hole 106 is located on one side of the evaporator 50, and the minimum distance between the edge of the mounting hole 106 and the evaporator 50 can be S, and the value of S can be not less than 45 mm to ensure the distance of the mounting hole 106.

[0063] Figure 7 FIG. 1 is a schematic diagram of the compressor installation of the exemplary embodiment. In some exemplary embodiments, as shown in FIG. Figure 3 , Figure 5 and Figure 7 As shown, the head assembly further includes a compressor 80 , which is located in the first cavity 401 and is mounted on the water receiving tray 105 by fasteners, and the compressor 80 is spaced apart from the evaporator 50 .

[0064] Figure 8 FIG. 1 is a schematic diagram of installing the air guide ring of the exemplary embodiment. In some exemplary embodiments, as shown in FIG. Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, the head assembly further includes an air guide ring 90, which can be mounted on the fan box 70 to guide the air flow in the fan box 70 to flow to the air outlet. The air guide ring 90 is located on a side of the fan box 70 away from the evaporator 50 in the first direction.

[0065] Fig. 9 for Figure 6 AA cross-sectional view, in some exemplary embodiments, as Figure 8 and Fig. 9 As shown, the head assembly also includes a fan 705, which can be installed in the fan box 70 through a bracket. When the fan 705 is working, it can generate an airflow passing through the head assembly. The fan 705 can be an axial flow fan, and the fan 705 can include a motor and a fan blade. The motor drives the fan blade to rotate. The axis of the fan 705 can be C1, and the axis C1 can intersect with the axis of the housing 10, but is not limited to this. For example, the axis C1 does not intersect with the axis of the housing 10. The center line of the electric control box 60 is C2, and the center line of the electric control box 60 can be a straight line passing through the geometric center of the electric control box 60 and perpendicular to the axis of the housing 10. The center line C2 can extend along the radial direction of the housing 10 and intersect with the axis of the housing 10. The angle between the axis C1 and the center line C2 can be β, β = 90° ± 10°, so that the electric control box 60 and the fan 705 are more compact, and the first opening area is larger, with a larger opening area, and the air intake is increased.

[0066] Fig.10 for Fig. 9In the locally enlarged schematic diagram of B in FIG. 1 , in some exemplary embodiments, as shown in FIG. Fig. 9 and Fig.10 As shown, the head assembly also includes a heat sink 30, which can provide heat dissipation for the electric control box 60. The electric control box 60, that is, the heat of the electric control box 60 is transferred to the heat sink 30 and transferred to the outside through the heat sink 30, so as to ensure that the electric control box 60 can work at a suitable temperature, ensure the working effect, and avoid overheating failure of the electrical components. The fan box 70 has a fan cavity 706 to form the above-mentioned hollow structure, and the heat sink 30 is installed in the fan cavity 706. The fan cavity 706 can quickly take away the heat of the heat sink 30, thereby improving the heat dissipation effect.

[0067] In some exemplary embodiments, Fig. 9 and Fig.10 As shown, the electric control box 60 includes a box body 602 and an electric device 603 located in the box body 602. The electric device 603 may be a circuit board, and the heat sink 30 may be connected to the electric device 603. A heat dissipation hole 708 is provided on the cavity wall of the fan cavity 706, and the heat dissipation hole 708 connects the fan cavity 706 and the first cavity 401. The heat dissipation element 30 may be a heat sink, and the fins of the heat sink are all located in the fan cavity 706. The heat dissipation element 30 may block the heat dissipation hole 708 to prevent the fan 705 from throwing water toward the electric control box 60. In some exemplary embodiments, the heat dissipation element 30 may be installed close to the top cover 101 of the housing 10, so that even if water enters the fan cavity 706, the heat dissipation element 30 will be soaked.

[0068] In some exemplary embodiments, Fig. 9 and Fig.10 As shown, a sealing ring 709 is provided between the circumferential edge of the heat sink 30 and the hole wall of the heat dissipation hole 708. The sealing ring 709 forms a ring along the edge of the heat dissipation hole 708. The sealing ring 709 can further ensure sealing to prevent water thrown onto the heat sink 30 by the fan 705 from flowing along the heat sink 60 to the electrical components in the electric control box 60.

[0069] In some exemplary embodiments, Fig. 9 As shown, when the head assembly is working, the fan 705, the evaporator 50, and the compressor 80 are all turned on, generating airflow. The airflow can enter the first cavity 401 first as shown by the dotted arrow, and the airflow passes through the evaporator 50 and enters the fan cavity 705. The evaporator 50 absorbs the heat of the airflow, which can reduce the temperature of the airflow, and the airflow becomes cold wind. The absorbed heat heats the water to be heated. The airflow with a lower temperature can take away the heat of the heat sink 60. Compared with the existing head assembly in which the heat sink 60 only dissipates heat naturally, the heat dissipation effect of the head assembly in this example can be significantly improved. The airflow in the fan cavity 705 flows out of the head assembly after passing through the fan 705.

[0070] In some exemplary embodiments, a heat pump water heater includes a water tank assembly and a head assembly as described in any of the above embodiments, wherein the head assembly and the water tank assembly are assembled together.

[0071] In combination with the above embodiments, the heat pump water heater and its head assembly in this example separate the air inlet 20 and the electric control box through the fan box 70, so that the air inlet 20 is no longer affected by the position of the electric control box, the air inlet 20 can be enlarged, the air intake volume can be increased, and the energy efficiency can be improved. At the same time, rainwater entering the installation cavity 40 with the outside wind can be prevented from directly contacting the electric control box, which can improve the safety of use and make the heat pump water heater suitable for more scenes. The evaporator 50 is bent, which can avoid the mounting hole 106, and the gap between it and the mounting hole 106 is larger, which is conducive to the disassembly and assembly of the magnesium rod in the later stage. The bent evaporator 50 has a larger air inlet area of ​​the evaporator 50, and when using a heat exchange tube 501 of similar length, the number of layers of the heat exchange tube 501 is less, and the evaporator 50 has less resistance to the wind flowing into the fan box 70, which can improve the heat exchange effect and improve the energy efficiency. The heat sink of the electric control box can be cooled by the cold air passing through the evaporator 50, which improves the heat dissipation effect, and the heat of the heat sink is also recycled. The electric control box is directly fixed on the fan box 70, so the installation is simpler and more stable, and the bracket for fixing the electric control box is omitted.

[0072] Although the embodiments disclosed in the present disclosure are as above, the contents described are only embodiments adopted to facilitate understanding of the present disclosure and are not intended to limit the present disclosure. Any technician in the field to which the present disclosure belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present disclosure, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A head assembly, characterized in that: include: A housing, wherein a mounting cavity is provided in the housing, and the housing is provided with an air inlet for connecting the mounting cavity with the outside; A fan box, the fan box is arranged in the installation cavity and is arranged to divide the installation cavity into a first cavity and a second cavity that are spaced apart from each other, and the air inlet is arranged on a cavity wall of the first cavity away from the fan box; an evaporator, the evaporator being disposed in the first cavity and between the air inlet and the fan box; An electric control box is arranged in the second cavity and on the fan box.

2. The head assembly according to claim 1, characterized in that: The evaporator is configured to be in an arc shape or a bent shape, and the end surface of the fan box close to the first cavity is configured to match and fit with the end surface of the evaporator close to the fan box.

3. The head assembly according to claim 2, characterized in that: The evaporator comprises a plurality of heat exchange tubes interconnected with each other, the plurality of heat exchange tubes are stacked, and each heat exchange tube comprises a plurality of main bodies arranged side by side and a plurality of U-shaped parts connecting two adjacent main bodies; At least one of the main bodies includes a first straight portion, a connecting portion, and a second straight portion connected in sequence, the first straight portion is located on a side of the second straight portion away from the electric control box, and the first straight portion and the second straight portion are arranged at an angle.

4. The head assembly according to claim 2, characterized in that: A mounting hole is provided on the cavity wall of the first cavity, the axis of the mounting hole is arranged to coincide with the axis of the housing, and the mounting hole is arranged on a side of the evaporator away from the fan box; The minimum distance between the edge of the mounting hole and the evaporator is set to be no less than 45 mm.

5. The head assembly according to claim 3, characterized in that: The included angle between the first straight portion and the second straight portion is set to 115° to 145°.

6. The head assembly according to claim 3, characterized in that: The connecting portion is configured to be in an arc shape, and the axis of the connecting portion is configured to coincide with the axis of the housing.

7. The head assembly according to claim 1, characterized in that: It also includes a heat sink for dissipating heat from the electric control box. A fan cavity is provided in the fan box. The heat sink is arranged in the fan cavity and is connected to the electric control box.

8. The head assembly according to claim 7, characterized in that: The housing comprises a water receiving tray, an outer frame and a top cover, wherein the top cover and the water receiving tray are spaced apart in a first direction, the outer frame is located between the water receiving tray and the top cover and forms a ring, and the heat sink is arranged on one side of the fan cavity close to the top cover.

9. The head assembly according to claim 7, characterized in that: It also includes a sealing ring, the fan box is provided with a heat dissipation hole connecting the fan cavity and the first cavity, the heat dissipation element is configured to close the heat dissipation hole, and the sealing ring is arranged between the heat dissipation element and the hole wall of the heat dissipation hole.

10. The head assembly according to any one of claims 1 to 9, characterized in that: In the circumferential direction of the housing, the cavity wall of the installation cavity includes a first opening area; The air inlet includes a plurality of first openings, the first openings are arranged in the first opening area, and the central angle of the first opening area is set to 80° to 120°.

11. The head assembly according to any one of claims 1 to 9, characterized in that: Also included is a fan, wherein the axis of the fan is arranged to intersect with the axis of the housing; The center line of the electric control box is set to extend along the radial direction of the housing, and the angle between the axis of the fan and the center line of the electric control box is set to be 80° to 100°.

12. A heat pump water heater, characterized in that: It comprises a head assembly as described in any one of claims 1 to 11.

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