Heat pump water heater and machine head assembly thereof

Abstract

The utility model provides a heat pump water heater and a machine head assembly thereof. The machine head assembly comprises a main body provided with a heat exchange air duct and a heat dissipation air duct, the heat exchange air duct is provided with a first air port and a second air port, the first air port is located in the top of the main body, the heat dissipation air duct is provided with a third air port and a fourth air port, and the third air port is communicated with the heat exchange air duct between the first air port and the second air port; the electric control box is located in the heat dissipation air channel; the heat exchanger and the fan assembly are both located in the heat exchange air duct, and the fan assembly is arranged at the first air opening; the heat exchange air duct forms a first air beam flowing from one of the first air opening and the second air opening to the other one of the first air opening and the second air opening through the heat exchanger, and the heat dissipation air duct forms a second air beam flowing from one of the third air opening and the fourth air opening to the other one of the third air opening and the fourth air opening through the electric control box. According to the scheme, the electric control box does not need to be sealed, and when the refrigerant leaks, refrigerant combustion or refrigerant explosion does not occur in the electric control box.

Description

Technical Field

[0001] The present application relates to but is not limited to the technical field of heat pump equipment, and specifically refers to a heat pump water heater and a head assembly thereof. Background Art

[0002] For an integral variable frequency heat pump water heater with side-in and top-out air inlet and outlet for the head assembly, the variable frequency electronic control mainboard (the control module includes the variable frequency electronic control mainboard) generates a large amount of heat. Usually, the front of the variable frequency electronic control mainboard is designed with heat dissipation fins (the radiator includes heat dissipation fins). The heat on the heat dissipation fins is taken away by the air beam, thereby achieving efficient heat dissipation of the variable frequency electronic control mainboard.

[0003] For the integral variable frequency heat pump water heater using flammable and explosive refrigerants, such as Figure 1 and Figure 2 As shown, when a refrigerant leak occurs in the head assembly 10, if the refrigerant enters the electric control box and contacts the ignition-prone electrical components on the variable frequency electric control main board, when the refrigerant concentration in the electric control box reaches the combustion concentration threshold (the fan assembly is not in operation, and the leaked refrigerant is more likely to enter the electric control box, and at this time the refrigerant concentration in the electric control box is more likely to reach the combustion concentration threshold), the refrigerant in the electric control box will be ignited by the energized ignition-prone electrical components and burn or explode. Therefore, the variable frequency electric control main board needs to be isolated from the refrigerant.

[0004] One solution is: Figure 1 and Figure 2 As shown, the electrical control box is sealed and installed vertically within the heat exchange duct where the fan assembly, heat exchanger, compressor, and piping are located. The heat sink fins are exposed outside the electrical control box. When the fan assembly operates, the air flow formed within the heat exchange duct removes heat from the heat sink fins, achieving efficient heat dissipation for the variable frequency electronic control motherboard. In theory, this solution prevents refrigerant from entering the electrical control box if a refrigerant leak occurs within the head assembly 10.

[0005] However, in actual applications, due to the large size of the variable frequency electronic control motherboard, the large number of lead wires from the electronic control box, and the exposed heat dissipation fins outside the electronic control box, the shape of the area where the base box and the cover of the electronic control box meet is irregular. This requires a large number of areas to be sealed, making it extremely difficult to achieve a very effective seal. Therefore, in the actual application of the above solution, when a refrigerant leak occurs within the head assembly 10, there is still the problem of the refrigerant being able to enter the electronic control box and the concentration within the electronic control box reaching the combustion concentration threshold. In other words, when a refrigerant leak occurs within the head assembly 10, refrigerant combustion or explosion may still occur within the electronic control box. Utility Model Content

[0006] The embodiment of the present application provides a head assembly of a heat pump water heater, comprising: a main body having a heat exchange air duct and a heat dissipation air duct, the heat exchange air duct has a first air port and a second air port, the first air port is located at the top of the main body, the heat dissipation air duct has a third air port and a fourth air port, the third air port is connected with the heat exchange air duct between the first air port and the second air port; an electric control box located in the heat dissipation air duct; a heat exchanger and a fan assembly, both located in the heat exchange air duct, and the fan assembly is arranged at the first air port; based on the operation of the fan assembly: the heat exchange air duct forms a first air beam flowing from one of the first air port and the second air port to the other through the heat exchanger, and the heat dissipation air duct forms a second air beam flowing from one of the third air port and the fourth air port to the other through the electric control box.

[0007] In some example embodiments, the heat exchange air duct further has a fifth air port, the fifth air port is located between the first air port and the second air port and is directed to the air inlet area or the air outlet area of the fan assembly, and the third air port is connected with the heat exchange air duct through the fifth air port.

[0008] In some example embodiments, the fan assembly comprises a driving motor and a centrifugal fan wheel, and the fifth air port is directed to the air inlet area or the air outlet area of the centrifugal fan wheel.

[0009] In some example embodiments, the main body comprises: a shell having a sixth air port and a seventh air port, the sixth air port is located at the top wall of the shell, the first air port is connected with the outside of the shell through the sixth air port, and the second air port and the fourth air port are connected with the outside of the shell through the seventh air port; and a support seat having a wind passing hole, which is installed in the shell and separates the inside of the shell into a first chamber, a second chamber and a third chamber, the first chamber is located on one side of the second chamber, the third chamber is located above the first chamber and the second chamber, and the wind passing hole connects the first chamber and the third chamber; wherein the heat exchanger is located in the first chamber, and the fan assembly is located in the third chamber.

[0010] In some example embodiments, the main body further comprises: an air guide ring, which is covered at the sixth air port and connected with the hole wall of the wind passing hole, the fan assembly is located in the air guide ring, the first chamber is connected with the inside of the air guide ring through the wind passing hole, the fifth air port is located on the peripheral wall of the air guide ring, the heat exchange air duct comprises the inside of the air guide ring, the wind passing hole and the first chamber, and the heat dissipation air duct comprises the second chamber.

[0011] In some example embodiments, the lower end of the air guide ring extends into the first chamber and is an air inlet end, the fifth air port is located at the lower end of the peripheral wall of the air guide ring and faces the air inlet area of the fan assembly in the first chamber, and the third air port is located at the shared side wall between the first chamber and the second chamber and is in communication with the fifth air port.

[0012] Based on the operation of the fan assembly, the heat exchange air duct forms a first air beam flowing from the second air port to the first air port through the heat exchanger, and the heat dissipation air duct forms a second air beam flowing from the fifth air port to the fourth air port through the electric control box.

[0013] In some example embodiments, the lower end of the air guide ring is an air inlet end, the fifth air port faces the air outlet area of the fan assembly in the third chamber, and the fifth air port extends towards the top wall of the second chamber to form a connecting air duct in the area outside the air guide ring in the third chamber, and the third air port is located at the top wall of the second chamber and is in communication with the connecting air duct.

[0014] Based on the operation of the fan assembly, the heat exchange air duct forms a first air beam flowing from the second air port to the first air port through the heat exchanger, and the heat dissipation air duct forms a second air beam flowing from the fifth air port to the fourth air port through the electric control box.

[0015] In some example embodiments, the heat exchanger is a bent structure, two ends of the heat exchanger are connected to the shared side wall between the first chamber and the second chamber, and the seventh air port is located at the peripheral wall of the shell.

[0016] In some example embodiments, the shared side wall between the first chamber and the second chamber has a communication hole near the peripheral wall of the shell, and the communication hole is located outside the two ends of the heat exchanger.

[0017] The utility model embodiment further provides a heat pump water heater, including the head assembly of heat pump water heater of any one embodiment described above.

[0018] The technical solution provided by the embodiment of the present application is that when the fan assembly is not running, since the heat exchanger is located in the heat exchange air duct and the electronic control box is located in the heat dissipation air duct, the heat exchange air duct and the heat dissipation air duct are different air ducts. Therefore, when the refrigerant leaks, the leaked refrigerant cannot enter the electronic control box, so that the refrigerant concentration in the electronic control box will never reach the combustion concentration threshold; when the fan assembly is running, the heat exchange air duct forms a first air beam flowing from one of the first air port and the second air port through the heat exchanger to the other of the first air port and the second air port, and the heat dissipation air duct forms a first air beam flowing from the third air port and the fourth air port One of the second air beams flows through the electronic control box to the other one flowing to the third air outlet and the fourth air outlet. When the refrigerant leaks, the leaked refrigerant is blown out of the main body in the heat exchange air duct, and very little or even no refrigerant passes through the heat dissipation air duct, that is, very little or even no refrigerant can enter the electronic control box, so that the refrigerant concentration in the electronic control box will never reach the combustion concentration threshold; therefore, in this solution, when the refrigerant leaks, refrigerant combustion or refrigerant explosion will not occur inside the electronic control box; moreover, even if the electronic control box is not sealed, refrigerant combustion or refrigerant explosion will not occur inside the electronic control box.

[0019] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention 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 invention and do not constitute a limitation on the technical solution of the present invention.

[0021] Figure 1 A schematic diagram of the exploded structure of the head assembly provided for related technology;

[0022] Figure 2 for Figure 1 The main structural cross-sectional view of the nose assembly shown;

[0023] Figure 3 A schematic diagram of the exploded structure of a handpiece assembly provided in some embodiments of the present application;

[0024] Figure 4 for Figure 3 A schematic diagram of the structure after the air guide ring and the fan assembly are assembled;

[0025] Figure 5 for Figure 3 The schematic diagram of the main structure cross-section of the head assembly is shown, and the arrows indicate the flow directions of the first air beam and the second air beam;

[0026] Figure 6 An exploded structural schematic view of a head assembly provided for another embodiment of the present application;

[0027] Figure 7 An assembled structural schematic view of the air guide ring and the fan assembly in Figure 6

[0028] Figure 8 A front structural sectional schematic view of the head assembly shown in Figure 6

[0029] Figure 9 A top structural sectional schematic view of the head assembly shown in Figure 6

[0030] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0031] 110 heat exchange air duct, 111 first air port, 112 second air port, 113 fifth air port, 120 heat dissipation air duct, 121 third air port, 200 electric control box, 210 heat dissipation fin, 300 heat exchanger, 400 fan assembly, 410 driving motor, 420 centrifugal fan wheel, 510 shell, 511 sixth air port, 512 seventh air port, 520 support seat, 521 air passing hole, 522 seat body, 523 partition plate, 524 communication hole, 530 air guide ring, 531 connecting air duct, 610 first chamber, 620 second chamber, 630 third chamber. DETAILED DESCRIPTION

[0032] To make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the drawings. It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other arbitrarily without conflict.

[0033] The head assembly of the heat pump water heater provided by the embodiments of the present application, like Figures 3 to 9 ​​​As shown, comprising: a main body, the main body having a heat exchange air duct 110 and a heat dissipation air duct 120, the heat exchange air duct 110 having a first air port 111 and a second air port 112, the first air port 111 being located at the top of the main body, the heat dissipation air duct 120 having a third air port 121 and a fourth air port, the third air port 121 being in communication with the heat exchange air duct 110 between the first air port 111 and the second air port 112; an electric control box 200, the electric control box 200 being located in the heat dissipation air duct 120; a heat exchanger 300 and a fan assembly 400, the heat exchanger 300 and the fan assembly 400 being located in the heat exchange air duct 110, and the fan assembly 400 being arranged at the first air port 111; based on the operation of the fan assembly 400: the heat exchange air duct 110 forms a first air beam flowing from one of the first air port 111 and the second air port 112 to the other of the first air port 111 and the second air port 112 through the heat exchanger 300, and the heat dissipation air duct 120 forms a second air beam flowing from one of the third air port 121 and the fourth air port to the other of the third air port 121 and the fourth air port through the electric control box 200 (the second air beam is used for heat dissipation of the electric control box 200).

[0034] When the fan assembly 400 is not running, since the heat exchanger 300 is located in the heat exchange air duct 110, the electric control box 200 is located in the heat dissipation air duct 120, and the heat exchange air duct 110 and the heat dissipation air duct 120 are different air ducts, therefore, when refrigerant leaks, the leaked refrigerant cannot enter the electric control box 200, so the refrigerant concentration in the electric control box 200 will not reach the combustion concentration threshold; when the fan assembly 400 is running, the heat exchange air duct 110 forms a first air beam flowing from one of the first air port 111 and the second air port 112 to the other of the first air port 111 and the second air port 112 through the heat exchanger 300, and the heat dissipation air duct 120 forms a second air beam flowing from one of the third air port 121 and the fourth air port to the other of the third air port 121 and the fourth air port through the electric control box 200, when refrigerant leaks, the leaked refrigerant is blown out of the main body in the heat exchange air duct 110, and very little or even no refrigerant passes through the heat dissipation air duct 120, that is, very little or even no refrigerant can enter the electric control box 200, so the refrigerant concentration in the electric control box 200 will not reach the combustion concentration threshold; therefore, in the case of refrigerant leakage, the inside of the electric control box 200 will not cause refrigerant combustion or refrigerant explosion; and even if the electric control box 200 is not sealed, the inside of the electric control box 200 will not cause refrigerant combustion or refrigerant explosion.

[0035] Among them, as Figure 3 , Figure 5 , Figure 6 , Figure 8 and Figure 9As shown, the electric control box 200 includes a box body with a bottom box and a cover, a heat dissipation fin 210, and a variable frequency electric control mainboard. The variable frequency electric control mainboard is located in the bottom box, the cover is covered on the bottom box, the heat dissipation fin 210 is located outside the box body and connected with the variable frequency electric control mainboard, and the second air flow passes through the heat dissipation fin 210 to realize heat dissipation and cooling of the variable frequency electric control mainboard. The bottom box and the cover do not need to be sealed.

[0036] In some examples, as shown in Figures 3 to 5 As shown, the heat exchange air duct 110 also has a fifth air port 113 located between the first air port 111 and the second air port 112 and facing the air inlet area of the fan assembly 400. The third air port 121 is connected with the heat exchange air duct 110 through the fifth air port 113. When the fan assembly 400 operates, the heat exchange air duct 110 forms the first air flow flowing from one of the first air port 111 and the second air port 112 to the other of the first air port 111 and the second air port 112 through the heat exchanger 300, the heat dissipation air duct 120 forms the second air flow flowing from the fourth air port to the third air port 121 through the electric control box 200, and the second air flow finally enters the heat exchange air duct 110 from the fifth air port 113.

[0037] In some embodiments, as shown in Figure 5 As shown, the fan assembly 400 includes a driving motor 410 and a centrifugal fan wheel 420, and the fifth air port 113 faces the air inlet area of the centrifugal fan wheel 420. The air inlet area of the centrifugal fan wheel 420 is located at the end of the centrifugal fan wheel 420. Under the negative pressure suction of the air inlet area of the centrifugal fan wheel 420, the heat dissipation air duct 120 can form a stable second air flow.

[0038] In some embodiments, as shown in Figure 3 and Figure 5 As shown, the main body includes a shell 510 having a sixth air port 511 and a seventh air port 512, the sixth air port 511 being located at the top wall of the shell 510, the first air port 111 being connected with the outside of the shell 510 through the sixth air port 511, the second air port 112 and the fourth air port being connected with the outside of the shell 510 through the seventh air port 512, and a support seat 520 having a wind passing hole 521, the support seat 520 being installed in the shell 510 and separating the inside of the shell 510 into a first chamber 610, a second chamber 620 and a third chamber 630. In the horizontal direction, the first chamber 610 is located on one side of the second chamber 620, and in the height direction, the third chamber 630 is located above the first chamber 610 and the second chamber 620. The wind passing hole 521 connects the first chamber 610 and the third chamber 630. The heat exchanger 300 is located in the first chamber 610, and the fan assembly 400 is located in the third chamber 630.

[0039] As shown in Figure 3 and Figure 5As shown, the support base 520 includes a base body 522 with the air passage hole 521 and a partition plate 523 erected below and connected to the base body 522, the first chamber 610 and the second chamber 620 are located on both sides of the partition plate 523, and the third chamber is located above the base body 522, and the partition plate 523 forms a common side wall between the first chamber 610 and the second chamber 620.

[0040] In some embodiments, as shown in Figures 3 to 5 As shown, the main body further includes: an air guide ring 530 covering the sixth air port 511 and connected to the hole wall of the air passage hole 521, the fan assembly 400 is located in the air guide ring 530, the first chamber 610 is in communication with the inside of the air guide ring 530 through the air passage hole 521, the fifth air port 113 is located on the peripheral wall of the air guide ring 530, the heat exchange air duct 110 includes the inside of the air guide ring 530, the air passage hole 521 and the first chamber 610, and the heat dissipation air duct 120 includes the second chamber 620.

[0041] In some embodiments, as shown in Figure 5 As shown, the lower end of the air guide ring 530 extends into the first chamber 610 and is the air inlet end (i.e., the first air port 111 is the air outlet, and the second air port 112 is the air inlet), the fifth air port 113 is located on the lower end of the peripheral wall of the air guide ring 530 and faces the air inlet area of the centrifugal fan 420 in the first chamber 610 (the air inlet area of the centrifugal fan 420 is located at the lower end of the centrifugal fan 420), and the third air port 121 is located on the common side wall (i.e., the partition plate 523) between the first chamber 610 and the second chamber 620 and is in communication with the fifth air port 113 (i.e., one end of the fifth air port 113 faces the air inlet area of the centrifugal fan 420, and the other end is in communication with the third air port 121, at this time, the fourth air port is the air inlet, and the third air port 121 is the air outlet). When the fan assembly 400 operates, the heat exchange air duct 110 forms a first air beam flowing from the second air port 112 to the first air port 111 through the heat exchanger 300 (the first air beam is finally blown out of the sixth air port 511 to the outside of the shell 510), and the heat dissipation air duct 120 forms a second air beam flowing from the fourth air port to the fifth air port 113 through the electric control box 200 (the second air beam is finally introduced into the heat exchange air duct 110 and blown out of the sixth air port 511 to the outside of the shell 510). Part of the seventh air port 512 is opposite to the second air port 112 (this part is the air inlet), and the other part is opposite to the fourth air port (this part is also the air inlet).

[0042] In some embodiments, as shown in Figure 3As shown, the heat exchanger 300 is in a bent structure, two ends of the heat exchanger 300 are connected with the common side wall between the first chamber 610 and the second chamber 620, and the seventh air port 512 is located on the peripheral wall of the shell 510 and is an air inlet. It can be that the heat exchanger 300 is arranged as a U-shaped heat exchanger; or it can be that the heat exchanger 300 is arranged as a C-shaped heat exchanger; or it can be that the heat exchanger 300 is arranged as a V-shaped heat exchanger, etc.; all of the above can achieve the purpose of the present application, and the design idea is not deviated from the design idea of the present application, and will not be described here again, and all should be within the protection scope of the present application.

[0043] In some embodiments, on the periphery of the shell 510, two ends of the heat exchanger 300 are connected with two ends of the partition plate 523, and the top of the heat exchanger 300 is sealingly matched with the seat body 522.

[0044] In some other examples, as shown in Figures 6 to 9 As shown, the heat exchange air duct 110 further has a fifth air port 113, the fifth air port 113 is located between the first air port 111 and the second air port 112 and faces the air outlet area of the fan assembly 400, the third air port 121 is connected with the heat exchange air duct 110 through the fifth air port 113, and when the fan assembly 400 operates: the heat exchange air duct 110 forms a first air beam flowing from one of the first air port 111 and the second air port 112 to the other through the heat exchanger 300, a part of the first air beam directly blows to the outside of the main body, and another part of the first air beam enters the fifth air port 113 and blows to the heat dissipation air duct 120, so that the heat dissipation air duct 120 forms a second air beam flowing from the third air port 121 to the fourth air port through the electric control box 200, that is, another part of the first air beam is the second air beam.

[0045] In some embodiments, as shown in Figure 8 As shown, the fan assembly 400 includes a driving motor 410 and a centrifugal fan wheel 420, and the fifth air port 113 faces the air outlet area of the centrifugal fan wheel 420. Among them, the air outlet area of the centrifugal fan wheel 420 is located on the peripheral part of the centrifugal fan wheel 420, and under the positive pressure blowing of the air outlet area of the centrifugal fan wheel 420, the heat dissipation air duct 120 can form a stable second air beam.

[0046] In some embodiments, as shown in Figure 6 and Figure 8As shown in the figure, the main body comprises: a shell 510, the shell 510 having a sixth air port 511 and a seventh air port 512, the sixth air port 511 being located at the top wall of the shell 510, the first air port 111 being connected with the outside of the shell 510 through the sixth air port 511, the second air port 112 and the fourth air port being connected with the outside of the shell 510 through the seventh air port 512; and a support seat 520 having a wind passing hole 521, the support seat 520 being installed in the shell 510 and separating the inside of the shell 510 into a first chamber 610, a second chamber 620 and a third chamber 630, the first chamber 610 being located at one side of the second chamber 620 in the horizontal direction, the third chamber 630 being located above the first chamber 610 and the second chamber 620 in the height direction, and the wind passing hole 521 connecting the first chamber 610 and the third chamber 630; wherein the heat exchanger 300 is located in the first chamber 610, and the fan assembly 400 is located in the third chamber 630.

[0047] As shown in the figure, Figure 6 and Figure 8 As shown in the figure, the support seat 520 comprises a seat body 522 having a wind passing hole 521 and a vertical partition plate 523, the partition plate 523 being located below the seat body 522 and connected with the seat body 522, the first chamber 610 and the second chamber 620 being located at two sides of the partition plate 523, and the third chamber being located above the seat body 522, the partition plate 523 forming a common side wall between the first chamber 610 and the second chamber 620.

[0048] As shown in the figure, Figures 6 to 8 As shown in the figure, the main body further comprises: an air guide ring 530, the air guide ring 530 being covered at the sixth air port 511 and connected with the hole wall of the wind passing hole 521, the fan assembly 400 being located in the air guide ring 530, the first chamber 610 being connected with the inside of the air guide ring 530 through the wind passing hole 521, the fifth air port 113 being located at the peripheral wall of the air guide ring 530, the heat exchange air duct 110 comprising the inside of the air guide ring 530, the wind passing hole 521 and the first chamber 610, and the heat dissipation air duct 120 comprising the second chamber 620.

[0049] As shown in the figure, Figure 8As shown, the lower end of the air guide ring 530 is the air inlet end (i.e., the first air outlet 111 is the air outlet, and the second air outlet 112 is the air inlet), the fifth air outlet 113 is in the third chamber 630 and extends towards the air outlet area of the centrifugal fan 420, and the area outside the air guide ring 530 in the third chamber 630: the fifth air outlet 113 extends towards the top wall of the second chamber 620 (the top wall of the second chamber 620 is the bottom wall of the third chamber 630) to form a connecting air duct 531 (i.e., the fifth air outlet 113 is in the third chamber 630, one end of the fifth air outlet 113 extends towards the air outlet area of the centrifugal fan 420, and the other end of the fifth air outlet 113 extends towards the top wall of the second chamber 620 to form the connecting air duct 531), and the third air outlet 121 is located on the top wall of the second chamber 620 and is in communication with the connecting air duct 531 (at this time, the third air outlet 121 is the air inlet, and the fourth air outlet is the air outlet). When the fan assembly 400 is running, the heat exchange air duct 110 forms a first air beam that flows from the second air outlet 112 to the first air outlet 111 through the heat exchanger 300 (part of the first air beam directly blows to the outside of the main body, and another part of the first air beam enters the fifth air outlet 113 to blow to the heat dissipation air duct 120, so that the heat dissipation air duct 120 forms a second air beam that flows from the fifth air outlet 113 to the fourth air outlet through the electric control box 200 (i.e., another part of the first air beam is the second air beam). Among them, part of the seventh air outlet 512 is opposite to the second air outlet 112 (this part is the air inlet), and the other part is opposite to the fourth air outlet (this part is the air outlet).

[0050] In some embodiments, as shown in Figure 6 The heat exchanger 300 is a bent structure, and the two ends of the heat exchanger 300 are connected to the shared side wall between the first chamber 610 and the second chamber 620, and the seventh air outlet 512 is located on the peripheral wall of the shell 510. It can be that the heat exchanger 300 is arranged as a U-shaped heat exchanger, or it can be that the heat exchanger 300 is arranged as a C-shaped heat exchanger, or it can be that the heat exchanger 300 is arranged as a V-shaped heat exchanger, etc.; all of the above can achieve the purpose of the present application, and the design idea is not deviated from the present application, and will not be described here, and all should be within the protection scope of the present application.

[0051] In some embodiments, as shown in Figure 9 The shared side wall between the first chamber 610 and the second chamber 620 has a communication hole 524 near the position of the peripheral wall of the shell 510, and the communication hole 524 is located outside the two ends of the heat exchanger 300, so that the second air beam can reach the second air outlet 112 from the communication hole 524 under the negative pressure suction of the second air outlet 112, and then be blown out from the first air outlet 111 through the heat exchanger 300. In this scheme, the heat of the electric control box 200 carried away by the second air beam can be exchanged with the heat exchanger 300, which is conducive to improving the heating efficiency of the heat pump water heater.

[0052] Among them, as shown in Figure 9As shown, one end of the partition plate 523 is spaced apart from the peripheral wall of the shell 510 to form an air passing interval, that is, the communication hole 524. In the peripheral direction of the shell 510, the two ends of the heat exchanger 300 are connected to the two ends of the partition plate 523, and the top of the heat exchanger 300 is sealingly connected to the seat body 522.

[0053] The heat pump water heater (not shown in the figure) provided by the embodiment of the utility model has all the advantages of the head assembly of the heat pump water heater provided by any of the above-mentioned embodiments, and will not be described here again.

[0054] The heat pump water heater has all the advantages of the head assembly of the heat pump water heater provided by any of the above-mentioned embodiments, and will not be described here again.

[0055] In summary, the technical scheme provided by the embodiment of the application, when the fan assembly is not running, the heat exchanger is located in the heat exchange air duct, the electric control box is located in the heat dissipation air duct, and the heat exchange air duct and the heat dissipation air duct are different air ducts, so that when the refrigerant leaks, the leaked refrigerant cannot enter the electric control box, so that the refrigerant concentration in the electric control box always does not reach the combustion concentration threshold; when the fan assembly is running, the heat exchange air duct forms a first air beam that flows from one of the first air port and the second air port to the other of the first air port and the second air port through the heat exchanger, and the heat dissipation air duct forms a second air beam that flows from one of the third air port and the fourth air port to the other of the third air port and the fourth air port through the electric control box, so that when the refrigerant leaks, the leaked refrigerant is blown out of the main body in the heat exchange air duct, and very little or even no refrigerant passes through the heat dissipation air duct, that is, very little or even no refrigerant can enter the electric control box, so that the refrigerant concentration in the electric control box always does not reach the combustion concentration threshold; therefore, when the refrigerant leaks, the inside of the electric control box will not burn or explode; and even if the electric control box is not sealed, the inside of the electric control box will not burn or explode.

[0056] In the description in the utility model, it needs to be explained that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "edge", "opposite", "four corners", "periphery", "mouth structure" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the structure indicated has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0057] In the description of the embodiments of the utility model, unless another definite provision and limitation, the term "connect", "directly connect", "indirectly connect", "fixedly connect", "install", "assemble" should do broad sense understanding, for example, can be fixedly connected, also can be detachable connection, or integrally connect, the term "install", "connect", "fixedly connect" can be directly connected, also can indirectly connect through intermediate medium, can be two elements inside the intercommunication. For the ordinary skill in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0058] Although the embodiments disclosed by the utility model are as above, the content described is only the embodiment adopted for facilitating the understanding of the utility model, and is not used to limit the utility model. Any person skilled in the art of the utility model can make any modification and change in the implementation form and details without departing from the spirit and scope of the utility model disclosed, but the patent protection scope of the utility model still needs to be defined by the appended claims.

Claims

1. A head assembly for a heat pump water heater, the head assembly comprising: The application relates to a heat exchanger, which comprises: a main body having a heat exchange air duct and a heat dissipation air duct, the heat exchange air duct having a first air port and a second air port, the first air port being located at the top of the main body, the heat dissipation air duct having a third air port and a fourth air port, the third air port being connected with the heat exchange air duct between the first air port and the second air port; an electric control box located in the heat dissipation air duct; a heat exchanger and a fan assembly, both of which are located in the heat exchange air duct, and the fan assembly is arranged at the first air port; based on the operation of the fan assembly, the heat exchange air duct forms a first air flow from one of the first air port and the second air port to the other through the heat exchanger, and the heat dissipation air duct forms a second air flow from one of the third air port and the fourth air port to the other through the electric control box.

2. The nose assembly of claim 1, wherein, The heat exchange air duct further has a fifth air port, which is located between the first air port and the second air port and faces the air inlet area or the air outlet area of the fan assembly, and the third air port is connected with the heat exchange air duct through the fifth air port.

3. The nose assembly of claim 2, wherein, The fan assembly comprises a driving motor and a centrifugal fan wheel, and the fifth air port faces the air inlet area or the air outlet area of the centrifugal fan wheel.

4. The nose assembly of claim 2 or 3, wherein, The main body comprises: a shell having a sixth air port and a seventh air port, the sixth air port being located at the top wall of the shell, the first air port being connected with the outside of the shell through the sixth air port, and the second air port and the fourth air port being connected with the outside of the shell through the seventh air port; and a supporting seat having a through hole, which is installed in the shell and separates the inside of the shell into a first chamber, a second chamber and a third chamber, the first chamber being located on one side of the second chamber, the third chamber being located above the first chamber and the second chamber, and the through hole connecting the first chamber and the third chamber; wherein the heat exchanger is located in the first chamber, and the fan assembly is located in the third chamber.

5. The nose assembly of claim 4, wherein, The main body further comprises: an air guide ring, which is arranged at the sixth air port and connected with the hole wall of the through hole, the fan assembly being located in the air guide ring, the first chamber being connected with the inside of the air guide ring through the through hole, the fifth air port being located at the circumferential wall of the air guide ring, the heat exchange air duct comprising the inside of the air guide ring, the through hole and the first chamber, and the heat dissipation air duct comprising the second chamber.

6. The handpiece assembly of claim 5, wherein, The lower end of the air guide ring extends into the first chamber and is an air inlet end, the fifth air port is located at the lower end of the circumferential wall of the air guide ring and faces the air inlet area of the fan assembly in the first chamber, and the third air port is located at the common side wall between the first chamber and the second chamber and is connected with the fifth air port in a butt joint mode; based on the operation of the fan assembly, the heat exchange air duct forms a first air flow from the second air port to the first air port through the heat exchanger, and the heat dissipation air duct forms a second air flow from the fourth air port to the fifth air port through the electric control box.

7. The handpiece assembly of claim 5, wherein, The lower end of the air guide ring is an air inlet end, the fifth air port extends towards an air outlet area of the fan assembly in the third chamber, and in the third chamber, the fifth air port extends towards a top wall of the second chamber to form a connecting air duct, and the third air port is located on the top wall of the second chamber and communicates with the connecting air duct; Based on the operation of the fan assembly, the heat exchange air duct forms a first air beam flowing from the second air port to the first air port through the heat exchanger, and the heat dissipation air duct forms a second air beam flowing from the fifth air port to the fourth air port through the electric control box.

8. The handpiece assembly of claim 4, wherein, The heat exchanger is a bent structure, two ends of the heat exchanger are connected to a common side wall between the first chamber and the second chamber, and the seventh air port is located on the peripheral wall of the shell.

9. The handpiece assembly of claim 8, wherein, The common side wall between the first chamber and the second chamber has a communication hole near the peripheral wall of the shell, and the communication hole is located outside the two ends of the heat exchanger.

10. A heat pump water heater, characterized by, A head assembly of a heat pump water heater comprising the heat exchanger according to any one of claims 1 to 9.

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