Heat pump water heater and machine head assembly thereof

Abstract

The invention 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-inlet 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 cooling fins (the radiator includes cooling fins). The heat on the cooling fins is taken away by the wind 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 refrigerant, such as Figure 1 and Figure 2 As shown, when refrigerant leakage occurs in the head assembly 10, if the refrigerant enters the electric control box and contacts the ignition-prone electrical device on the variable frequency electric control main board, then 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 device and burn or explode, so 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 electric control box is sealed and installed vertically in the heat exchange air duct where the fan assembly, heat exchanger, compressor and pipeline are located. The heat dissipation fins are exposed outside the electric control box. When the fan assembly is running, the wind beam formed in the heat exchange air duct takes away the heat on the heat dissipation fins, thereby realizing efficient heat dissipation of the variable frequency electric control mainboard. In theory, when the refrigerant leaks inside the head assembly 10, the refrigerant cannot enter the inside of the electric control box.

[0005] However, in actual application, due to the large size of the variable frequency electric control mainboard, the large number of lead wires of the electric control box, and the heat dissipation fins exposed outside the electric control box, the shape of the matching position of the bottom box and the cover of the electric control box is irregular, and there are many areas that need to be sealed, and the area is particularly large, making it extremely difficult to achieve very effective sealing. Therefore, in the actual application of the above scheme, when the refrigerant leaks inside the head assembly 10, there is still the problem that the refrigerant can enter the electric control box and the concentration in the electric control box can reach the combustion concentration threshold, that is: when the refrigerant leaks inside the head assembly 10, the refrigerant combustion or refrigerant explosion may still occur inside the electric control box. Summary of the invention

[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 having a first air outlet and a second air outlet, the first air outlet being located at the top of the main body, the heat dissipation air duct having a third air outlet and a fourth air outlet, the third air outlet being connected to the heat exchange air duct between the first air outlet and the second air outlet; an electrical control box being located in the heat dissipation air duct; a heat exchanger and a fan assembly being both located in the heat exchange air duct, and the fan assembly being arranged at the first air outlet; based on the operation of the fan assembly: the heat exchange air duct forms a first wind beam flowing from one of the first air outlet and the second air outlet through the heat exchanger to the other of the first air outlet and the second air outlet, and the heat dissipation air duct forms a second wind beam flowing from one of the third air outlet and the fourth air outlet through the electrical control box to the other of the third air outlet and the fourth air outlet.

[0007] In some exemplary embodiments, the heat exchange air duct also has a fifth air outlet, which is located between the first air outlet and the second air outlet and faces the air inlet area or the air outlet area of ​​the fan assembly, and the third air outlet is connected to the heat exchange air duct through the fifth air outlet.

[0008] In some exemplary embodiments, the fan assembly includes a driving motor and a centrifugal wind wheel, and the fifth air outlet faces an air inlet area or an air outlet area of ​​the centrifugal wind wheel.

[0009] In some exemplary embodiments, the main body includes: a shell, the shell having a sixth air outlet and a seventh air outlet, the sixth air outlet is located on the top wall of the shell, the first air outlet is connected to the outside of the shell through the sixth air outlet, and the second air outlet and the fourth air outlet are connected to the outside of the shell through the seventh air outlet; and a support seat with an air hole, which is installed in the shell and divides the interior 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 at the same time, and the air 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 exemplary embodiments, the main body also includes: an air guide ring, which is covered at the sixth air outlet and connected to the hole wall of the air hole, the fan assembly is located in the air guide ring, the first chamber is connected to the interior of the air guide ring through the air hole, the fifth air outlet is located on the surrounding wall of the air guide ring, the heat exchange air duct includes the interior of the air guide ring, the air hole and the first chamber, and the heat dissipation air duct includes the second chamber.

[0011] In some exemplary embodiments, the lower end of the air guide ring extends into the first chamber and is the air inlet end, the fifth air outlet 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 outlet is located on the common side wall between the first chamber and the second chamber, and is connected to the fifth air outlet;

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

[0013] In some exemplary embodiments, the lower end of the air guide ring is an air inlet end, the fifth air port is in the third chamber toward the air outlet area of ​​the fan assembly, and in the area outside the air guide ring in the third chamber: the fifth air port extends toward the top wall of the second chamber to form a connecting air duct, the third air port is located on the top wall of the second chamber, and is connected to 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 outlet through the heat exchanger to the first air outlet, and the heat dissipation air duct forms a second air beam flowing from the fifth air outlet through the electrical control box to the fourth air outlet.

[0015] In some exemplary embodiments, the heat exchanger is a bent structure, both ends of the heat exchanger are connected to the common side wall between the first chamber and the second chamber, and the seventh air outlet is located on the peripheral wall of the shell.

[0016] In some exemplary embodiments, a communication hole is provided on a common side wall between the first chamber and the second chamber at a position adjacent to the peripheral wall of the shell, and the communication hole is located outside of both ends of the heat exchanger.

[0017] An embodiment of the present invention further provides a heat pump water heater, comprising the head assembly of the heat pump water heater described in any of the above embodiments.

[0018] The technical solution provided in 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 electric 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 electric control box, so that the refrigerant concentration in the electric control box will never reach the combustion concentration threshold; when the fan assembly is running, the heat exchange air duct forms a first wind 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 wind beam flowing from the third air port and the fourth air port One of the second air beams passes through the electrical control box to the third air outlet and the other flows into the fourth air outlet. When the refrigerant leaks, the leaked refrigerant is blown outside 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 electrical control box, so that the refrigerant concentration in the electrical 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 electrical control box; moreover, even if the electrical control box is not sealed, refrigerant combustion or refrigerant explosion will not occur inside the electrical control box.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by 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 the related art;

[0022] Figure 2 for Figure 1 The schematic diagram of the front structural section of the nose assembly shown;

[0023] Figure 3 A schematic diagram of the exploded structure of a head 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 front structural section of the head assembly shown, arrows indicate the flow directions of the first air beam and the second air beam;

[0026] Figure 6Schematic diagram of the exploded structure of the head assembly provided in some other embodiments of the present application;

[0027] Figure 7 for Figure 6 A schematic diagram of the structure after the air guide ring and the fan assembly are assembled;

[0028] Figure 8 for Figure 6 The schematic diagram of the front structural section of the head assembly shown, arrows indicate the flow directions of the first air beam and the second air beam;

[0029] Fig. 9 for Figure 6 A schematic top view structural cross-sectional view of the nose assembly is shown.

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

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

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

[0033] The head assembly of the heat pump water heater provided in the embodiment of the present application is as follows: Figures 3 to 9As shown, the heat exchange air duct 110 and the heat dissipation air duct 120 are included: a main body, the main body has a heat exchange air duct 110 and a heat dissipation air duct 120, the heat exchange air duct 110 has a first air port 111 and a second air port 112, the first air port 111 is located at the top of the main body, the heat dissipation air duct 120 has a third air port 121 and a fourth air port, the third air port 121 is connected to 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 is located in the heat dissipation air duct 120; a heat exchanger 300 and a fan assembly 400, both of which are Located in the heat exchange air duct 110, and the fan assembly 400 is arranged at the first air outlet 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 outlet 111 and the second air outlet 112 through the heat exchanger 300 to the other of the first air outlet 111 and the second air outlet 112, and the heat dissipation air duct 120 forms a second air beam flowing from one of the third air outlet 121 and the fourth air outlet through the electric control box 200 to the other of the third air outlet 121 and the fourth air outlet (the second air beam is used to dissipate heat for 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 and the electric control box 200 is located in the heat dissipation air duct 120, the heat exchange air duct 110 and the heat dissipation air duct 120 are different air ducts. Therefore, when the refrigerant leaks, the leaked refrigerant cannot enter the electric control box 200, so that the refrigerant concentration in the electric control box 200 will never reach the combustion concentration threshold; when the fan assembly 400 is running, the heat exchange air duct 110 forms a first wind beam flowing from one of the first air port 111 and the second air port 112 through the heat exchanger 300 to the other of the first air port 111 and the second air port 112, and the heat dissipation air duct 120 forms a first wind beam flowing from the third air port 121 The second air beam flows from one of the fourth air outlets through the electrical control box 200 to the third air outlet 121 and the other of the fourth air outlets. When the refrigerant leaks, the leaked refrigerant is blown outside 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 electrical control box 200, so that the refrigerant concentration in the electrical control box 200 will never reach the combustion concentration threshold; therefore, in this scheme, when the refrigerant leaks, refrigerant combustion or refrigerant explosion will not occur inside the electrical control box 200; and, even if the electrical control box 200 is not sealed, refrigerant combustion or refrigerant explosion will not occur inside the electrical control box 200.

[0035] Among them, Figure 3 , Figure 5 , Figure 6 , Figure 8 and Fig. 9As shown, the electric control box 200 includes a box body with a bottom box and a cover body, a heat sink 210 and a variable frequency electric control mainboard. The variable frequency electric control mainboard is located in the bottom box, the cover body is installed on the bottom box, the heat sink 210 is located outside the box body and connected to the variable frequency electric control mainboard, and the second air beam contacts the heat sink 210 to achieve heat dissipation and cooling of the variable frequency electric control mainboard. In this solution, no sealing treatment is required between the bottom box and the cover body.

[0036] In some examples, such as Figures 3 to 5 As shown, the heat exchange air duct 110 also has a fifth air outlet 113, which is located between the first air outlet 111 and the second air outlet 112 and faces the air inlet area of ​​the fan assembly 400, and the third air outlet 121 is connected to the heat exchange air duct 110 through the fifth air outlet 113. When the fan assembly 400 is in operation: the heat exchange air duct 110 forms a first air beam flowing from one of the first air outlet 111 and the second air outlet 112 through the heat exchanger 300 to the other of the first air outlet 111 and the second air outlet 112, and the heat dissipation air duct 120 forms a second air beam flowing from the fourth air outlet through the electrical control box 200 to the third air outlet 121, and the second air beam finally enters the heat exchange air duct 110 from the fifth air outlet 113.

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

[0038] In some embodiments, Figure 3 and Figure 5 As shown, the main body includes: a shell 510, the shell 510 has a sixth air outlet 511 and a seventh air outlet 512, the sixth air outlet 511 is located on the top wall of the shell 510, the first air outlet 111 is connected to the outside of the shell 510 through the sixth air outlet 511, and the second air outlet 112 and the fourth air outlet are connected to the outside of the shell 510 through the seventh air outlet 512; and a support base 520 with an air hole 521, the support base 520 is installed in the shell 510 and divides the interior 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 at the same time, and the air hole 521 connects 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.

[0039] Among them, Figure 3 and Figure 5As shown, the support seat 520 includes a seat body 522 having an air hole 521 and a vertical partition plate 523, wherein the partition plate 523 is located below the seat body 522 and is connected to the seat 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 seat 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, Figures 3 to 5 As shown, the main body also includes: an air guide ring 530, the air guide ring 530 cover is arranged at the sixth air outlet 511 and is connected to the hole wall of the air hole 521, the fan assembly 400 is located in the air guide ring 530, the first chamber 610 is connected with the interior of the air guide ring 530 through the air hole 521, the fifth air outlet 113 is located on the peripheral wall of the air guide ring 530, the heat exchange air duct 110 includes the interior of the air guide ring 530, the air hole 521 and the first chamber 610, and the heat dissipation air duct 120 includes the second chamber 620.

[0041] Among them, 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 (that is, 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 at the lower end of the peripheral wall of the air guide ring 530, and faces the air inlet area of ​​the centrifugal wind wheel 420 in the first chamber 610 (the air inlet area of ​​the centrifugal wind wheel 420 is located at the lower end of the centrifugal wind wheel 420), and the third air port 121 is located on the common side wall between the first chamber 610 and the second chamber 620 (that is, the partition plate 523), and is connected to the fifth air port 113 (that is, one end of the fifth air port 113 faces the air inlet area of ​​the centrifugal wind wheel 420, and the other end is connected to 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 is in operation, the heat exchange air duct 110 forms a first air beam flowing from the second air port 112 through the heat exchanger 300 to the first air port 111 (the first air beam eventually blows from the sixth air port 511 to the outside of the housing 510), and the heat dissipation air duct 120 forms a second air beam flowing from the fourth air port through the electric control box 200 to the fifth air port 113 (the second air beam eventually enters the heat exchange air duct 110 and blows from the sixth air port 511 to the outside of the housing 510). Among them, a 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, Figure 3As shown, the heat exchanger 300 is a bent structure, and the two ends of the heat exchanger 300 are connected to the common side wall between the first chamber 610 and the second chamber 620. The seventh air port 512 is located on the peripheral wall of the shell 510 and is an air inlet. The heat exchanger 300 may be set as a U-shaped heat exchanger; or the heat exchanger 300 may be set as a C-shaped heat exchanger; or the heat exchanger 300 may be set as a V-shaped heat exchanger, etc. All of the above can achieve the purpose of this application, and the purpose does not deviate from the design concept of the present invention, and will not be repeated here, and all should belong to the protection scope of this application.

[0043] In some embodiments, in the circumferential direction of the shell 510 , two ends of the heat exchanger 300 are connected to two ends of the partition plate 523 , and the top of the heat exchanger 300 is sealed with the seat body 522 .

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

[0045] In some embodiments, Figure 8 As shown, the fan assembly 400 includes a driving motor 410 and a centrifugal wind wheel 420, and the fifth air port 113 faces the air outlet area of ​​the centrifugal wind wheel 420. The air outlet area of ​​the centrifugal wind wheel 420 is located at the periphery of the centrifugal wind wheel 420, and under the positive pressure blowing of the air outlet area of ​​the centrifugal wind wheel 420, the heat dissipation air duct 120 can form a stable and flowing second air beam.

[0046] In some embodiments, Figure 6 and Figure 8As shown, the main body includes: a shell 510, the shell 510 has a sixth air outlet 511 and a seventh air outlet 512, the sixth air outlet 511 is located on the top wall of the shell 510, the first air outlet 111 is connected to the outside of the shell 510 through the sixth air outlet 511, and the second air outlet 112 and the fourth air outlet are connected to the outside of the shell 510 through the seventh air outlet 512; and a support base 520 with an air hole 521, the support base 520 is installed in the shell 510 and divides the interior 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 at the same time, and the air hole 521 connects 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] Among them, Figure 6 and Figure 8 As shown, the support seat 520 includes a seat body 522 having an air hole 521 and a vertical partition plate 523, wherein the partition plate 523 is located below the seat body 522 and is connected to the seat 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 seat body 522, and the partition plate 523 forms a common side wall between the first chamber 610 and the second chamber 620.

[0048] In some embodiments, Figures 6 to 8 As shown, the main body also includes: an air guide ring 530, the air guide ring 530 cover is arranged at the sixth air outlet 511 and is connected to the hole wall of the air hole 521, the fan assembly 400 is located in the air guide ring 530, the first chamber 610 is connected with the interior of the air guide ring 530 through the air hole 521, the fifth air outlet 113 is located on the peripheral wall of the air guide ring 530, the heat exchange air duct 110 includes the interior of the air guide ring 530, the air hole 521 and the first chamber 610, and the heat dissipation air duct 120 includes the second chamber 620.

[0049] Among them, Figure 8As shown, the lower end of the air guide ring 530 is the air inlet end (that is, 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 facing the air outlet area of ​​the centrifugal wind wheel 420, and in the area outside the air guide ring 530 in the third chamber 630: the fifth air outlet 113 extends toward 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 (that is, the fifth air outlet 113 is in the third chamber 630, one end of the fifth air outlet 113 extends toward the air outlet area of ​​the centrifugal wind wheel 420, and the other end extends toward the top wall of the second chamber 620 to form a connecting air duct 531), and the third air outlet 121 is located on the top wall of the second chamber 620, and is connected to 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 flowing from the second air outlet 112 to the first air outlet 111 through the heat exchanger 300 (a part of the first air beam is directly blown to the outside of the main body, and another part of the first air beam enters the fifth air outlet 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 fifth air outlet 113 to the fourth air outlet through the electric control box 200 (that is, another part of the first air beam is the second air beam). Among them, a 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, Figure 6 As shown, the heat exchanger 300 is a bent structure, and the two ends of the heat exchanger 300 are connected to the common 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. The heat exchanger 300 may be set as a U-shaped heat exchanger; or the heat exchanger 300 may be set as a C-shaped heat exchanger; or the heat exchanger 300 may be set as a V-shaped heat exchanger, etc.; all of the above can achieve the purpose of this application, and its purpose does not deviate from the design concept of the present invention, and will not be repeated here, and all should belong to the protection scope of this application.

[0051] In some embodiments, Fig. 9 As shown, a connecting hole 524 is provided on the common side wall between the first chamber 610 and the second chamber 620, adjacent to the peripheral wall of the shell 510. The connecting hole 524 is located on the outside of both ends of the heat exchanger 300, so that the second air beam can reach the second air outlet 112 from the connecting hole 524 under the negative pressure suction action of the second air outlet 112, and then pass through the heat exchanger 300 and be blown out of the heat exchange air duct 110 from the first air outlet 111. In this scheme, the heat of the electric control box 200 taken away by the second air beam can be heat exchanged with the heat exchanger 300, which is beneficial to improving the heating efficiency of the heat pump water heater.

[0052] Among them, Fig. 9As shown, in the circumferential direction of the housing 510, one end of the partition plate 523 is spaced from the circumferential wall of the housing 510 to form a wind passing space, and the wind passing space is the connecting hole 524. In the circumferential direction of the housing 510, both ends of the heat exchanger 300 are connected to both ends of the partition plate 523, and the top of the heat exchanger 300 and the seat 522 are sealed.

[0053] A heat pump water heater (not shown in the figure) provided in an embodiment of the present invention comprises a head assembly of the heat pump water heater described in any of the above embodiments.

[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 embodiments, which will not be described in detail here.

[0055] In summary, the technical solution provided in 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 wind 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 wind beam flowing from the third air port and the fourth air port One of the second air streams in the opening passes through the electrical 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 outside 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 electrical control box, so that the refrigerant concentration in the electrical control box will never reach the combustion concentration threshold; therefore, in this scheme, when the refrigerant leaks, refrigerant combustion or refrigerant explosion will not occur inside the electrical control box; moreover, even if the electrical control box is not sealed, refrigerant combustion or refrigerant explosion will not occur inside the electrical control box.

[0056] 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred structure has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", and "assembly" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", and "fixed connection" can be a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention 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 invention, but the patent protection scope of the present invention shall still be defined by the attached claims.

Claims

1. A head assembly of a heat pump water heater, characterized in that: include: 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 to the heat exchange air duct between the first air port and the second air port; An electric control box, located in the heat dissipation duct; 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 outlet; 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 outlet and the second air outlet through the heat exchanger to the other of the first air outlet and the second air outlet, and the heat dissipation air duct forms a second air beam flowing from one of the third air outlet and the fourth air outlet through the electrical control box to the other of the third air outlet and the fourth air outlet.

2. The head assembly according to claim 1, characterized in that: The heat exchange air duct also has a fifth air outlet, which is located between the first air outlet and the second air outlet and faces the air inlet area or the air outlet area of ​​the fan assembly. The third air outlet is connected to the heat exchange air duct through the fifth air outlet.

3. The head assembly according to claim 2, characterized in that: The fan assembly includes a driving motor and a centrifugal wind wheel, and the fifth air outlet faces an air inlet area or an air outlet area of ​​the centrifugal wind wheel.

4. The head assembly according to claim 2 or 3, characterized in that: The subject includes: a housing, the housing having a sixth air port and a seventh air port, the sixth air port being located on a top wall of the housing, the first air port being connected to the outside of the housing through the sixth air port, and the second air port and the fourth air port being connected to the outside of the housing through the seventh air port; and A support base with an air hole is installed in the shell and divides the interior of the shell into a first chamber, a second chamber and a third chamber, wherein 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 at the same time, and the air hole communicates the first chamber with 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 head assembly according to claim 4, characterized in that: The subject also includes: The air guide ring is covered at the sixth air outlet and connected to the hole wall of the air hole. The fan assembly is located in the air guide ring. The first chamber is connected to the interior of the air guide ring through the air hole. The fifth air outlet is located on the peripheral wall of the air guide ring. The heat exchange air duct includes the interior of the air guide ring, the air hole and the first chamber. The heat dissipation air duct includes the second chamber.

6. The head assembly according to claim 5, characterized in that: The lower end of the air guide ring extends into the first chamber and is the air inlet end. The fifth air outlet 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. The third air outlet is located on the common side wall between the first chamber and the second chamber and is connected to the fifth air outlet. Based on the operation of the fan assembly: the heat exchange air duct forms a first air beam flowing from the second air outlet through the heat exchanger to the first air outlet, and the heat dissipation air duct forms a second air beam flowing from the fourth air outlet through the electrical control box to the fifth air outlet.

7. The head assembly according to claim 5, characterized in that: The lower end of the air guide ring is an air inlet end, the fifth air port is in the third chamber toward the air outlet area of ​​the fan assembly, and in the area outside the air guide ring in the third chamber: the fifth air port extends toward the top wall of the second chamber to form a connecting air duct, the third air port is located on the top wall of the second chamber, and is connected to 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 outlet through the heat exchanger to the first air outlet, and the heat dissipation air duct forms a second air beam flowing from the fifth air outlet through the electrical control box to the fourth air outlet.

8. The head assembly according to claim 4, characterized in that: The heat exchanger is a bent structure, both ends of the heat exchanger are connected to the common side wall between the first chamber and the second chamber, and the seventh air outlet is located on the peripheral wall of the shell.

9. The head assembly according to claim 8, characterized in that: A communication hole is provided on the common side wall between the first chamber and the second chamber at a position adjacent to 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 in that: The invention comprises a head assembly of a heat pump water heater as claimed in any one of claims 1 to 9.

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