Heat pump water heater and machine head assembly thereof
By designing different air ducts and drainage structures in the head assembly of the heat pump water heater, the risk of entering the electronic control box when refrigerant leaks is solved, and the effect of preventing refrigerant from burning or explosion is achieved.
Patent Information
- Application Number
- CN202411749939.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-07
AI Technical Summary
When the refrigerant leaks, the refrigerant is prone to enter the electronic control box, causing the refrigerant to reach the combustion or explosion threshold, and there is a risk of combustion or explosion.
A heat pump water heater head assembly is designed. By setting different air outlets and drainage structures in the heat exchange air duct and the heat dissipation air duct, it ensures that the refrigerant cannot enter the electronic control box when it leaks. When the fan assembly is running, the air beam is guided through the drainage structure to reduce the air volume of refrigerant entering the cooling air duct and prevent the refrigerant concentration from reaching the combustion threshold.
It effectively prevents the refrigerant from reaching combustion or explosion concentration in the electronic control box, and avoids the risk of refrigerant combustion or explosion. Even if the electronic control box is not sealed, refrigerant will not burn or explosion.
Smart Images
Figure CN119573254A_ABST
Abstract
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 side-outlet air inlet and outlet for the machine head, the variable frequency electronic control mainboard (the control module includes the variable frequency electronic control mainboard) generates a large amount of heat. Usually, a heat sink (the radiator includes a heat sink) is designed on the front of the variable frequency electronic control mainboard. The heat on the heat sink is taken away by the wind beam, thereby achieving efficient heat dissipation of the variable frequency electronic control mainboard.
[0003] For an integral variable frequency heat pump water heater that uses flammable and explosive refrigerants, when refrigerant leakage occurs in the machine head, if the refrigerant enters the electric control box and contacts the ignition-prone electrical components 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, at which 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 to seal the electric control box and install it vertically in the heat exchange air duct where the fan assembly, heat exchanger, compressor and pipeline are located. The heat sink is 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 sink, realizing efficient heat dissipation of the variable frequency electric control motherboard. In theory, when the refrigerant leaks inside the machine head, 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 sink 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 solution, when refrigerant leaks inside the machine head, 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 refrigerant leaks inside the machine head, refrigerant combustion or refrigerant explosion may still occur inside the electric control box. Summary of the invention
[0006] An 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, a heat dissipation air duct and a drainage structure, wherein a first air outlet is provided at one end of the heat exchange air duct and a second air outlet is provided at the other end, and a third air outlet is provided at one end of the heat dissipation air duct and a fourth air outlet is provided at the other end; a fan assembly and a heat exchanger are sequentially arranged in the heat exchange air duct along the axial direction of the heat exchange air duct, the fan assembly is arranged to form a wind beam flowing from the second air outlet through the heat exchange air duct to the first air outlet, and the drainage structure is arranged to guide the wind beam at the first air outlet to flow to the third air outlet; and an electrical control box is arranged in the heat dissipation air duct.
[0007] In some exemplary embodiments, the projection of the drainage structure along the axial direction of the heat dissipation air duct is at least partially located within the projection area of the third air outlet along the axial direction of the heat dissipation air duct, and along the flow direction of the air beam in the heat exchange air duct: the third air outlet is located on the downstream side of the drainage structure and faces the drainage structure.
[0008] In some exemplary embodiments, the drainage structure is a drainage baffle, which is located in the first air outlet and connected to the peripheral wall of the first air outlet, and the third air outlet is located on the inner peripheral surface of the first air outlet.
[0009] In some exemplary embodiments, the guide baffle includes an inclined plate segment along the radial direction of the heat exchange air duct: the inclined plate segment is inclined from its radial outer end to its radial inner end and extends toward the direction where the second air outlet is located.
[0010] In some exemplary embodiments, the deflection baffle further includes a vertical plate segment erected in the up-down direction, and the radial outer end of the inclined plate segment is connected to the peripheral wall of the first air outlet through the vertical plate segment.
[0011] In some exemplary embodiments, along the flow direction of the air beam in the heat exchange air duct: the fan assembly is located on the downstream side of the third air outlet, and the heat exchanger is located on the downstream side of the fan assembly.
[0012] In some exemplary embodiments, the electric control box includes a box body, an electric control module and a heat sink, the electric control module is disposed inside the box body, and the heat sink is at least partially located outside the box body and connected to the electric control module.
[0013] In some exemplary embodiments, the heat dissipation air duct includes a first air duct section, a accommodating cavity, and a second air duct section connected in sequence, the third air outlet is located in the first air duct section, the fourth air outlet is located in the second air duct section, and the electric control box is located in the accommodating cavity.
[0014] In some exemplary embodiments, one of the heat exchange air duct and the heat dissipation air duct is located above the other, the first air outlet is located in front of the second air outlet, and the third air outlet is located in front of the fourth air outlet; the main body includes: a shell, having a front air outlet, a first rear air outlet and a second rear air outlet; an air guide ring and a support seat, both of which are arranged in the shell, and the support seat is located at the upper rear side of the air guide ring, the heat exchange air duct is located between the support seat and the bottom wall of the shell, the heat dissipation air duct is located at the support seat and the air guide ring, the first air outlet and the third air outlet are located at the air guide ring, and the fourth air outlet is located at the support seat, the front air outlet is opposite to the first air outlet, the first rear air outlet is opposite to the second air outlet, and the second rear air outlet is opposite to the fourth air outlet.
[0015] An embodiment of the present application also provides a heat pump water heater, comprising a head assembly of the heat pump water heater described in any of the above embodiments.
[0016] 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 electrical 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 electrical control box; when the fan assembly is running, since a part of the wind beam is blown from the first air port to the outside of the heat exchange air duct, the other part of the wind beam is blown from the third air port through the heat dissipation air duct and from the fourth air port to the outside of the heat dissipation air duct under the guidance of the drainage structure. Therefore, when the refrigerant leaks, the amount of air and the amount of refrigerant entering the heat dissipation air duct are small, and even if a part of the refrigerant in the heat dissipation air duct enters the electrical control box, the refrigerant concentration in the electrical control box will not 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; and, even if the electrical control box is not sealed, refrigerant combustion or refrigerant explosion will not occur inside the electrical control box.
[0017] 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
[0018] 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.
[0019] Figure 1 A schematic diagram of the exploded structure of a head assembly provided in some embodiments of the present application;
[0020] Figure 2 for Figure 1Schematic diagram of the structure of the electronic control box;
[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the middle support seat;
[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the middle air guide ring;
[0023] Figure 5 for Figure 1 The schematic diagram of the cross-sectional structure of the head assembly shown is a schematic diagram of the cross-sectional structure of the head assembly, the cross-sectional position is along the area where the air beam in the heat dissipation air duct flows, and the arrow indicates the flow direction of the air beam;
[0024] Figure 6 for Figure 1 The left side structural diagram of the head assembly shown;
[0025] Figure 7 for Figure 6 AA cross-sectional structural schematic diagram of the nose assembly shown.
[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0027] 110 heat exchange air duct, 111 first air outlet, 112 second air outlet, 120 heat dissipation air duct, 121 third air outlet, 122 fourth air outlet, 123 accommodating groove, 124 second air duct section, 125 first part, 126 second part, 127 cover plate, 130 drainage structure, 131 inclined plate section, 132 vertical plate section, 133 recessed portion, 200 fan assembly, 210 fan box, 220 wind wheel, 230 driving mechanism, 300 heat exchanger, 400 electric control box, 410 bottom box, 420 cover body, 430 radiator, 510 water receiving tray, 520 front side plate, 521 front air outlet, 530 rear side plate, 532 second rear air outlet, 540 top cover, 600 air guide ring, 610 process hole, 700 support seat, 800 compressor, 910 air outlet mesh cover, 920 support vertical plate. DETAILED DESCRIPTION
[0028] 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.
[0029] The head assembly of the heat pump water heater provided in the embodiment of the present application is as follows: Figures 1 to 7As shown, it includes: a main body, the main body has a heat exchange air duct 110, a heat dissipation air duct 120 and a drainage structure 130, one of the heat dissipation air duct 120 and the heat exchange air duct 110 is located above the other (or it can be a mode that one of the heat dissipation air duct 120 and the heat exchange air duct 110 is located on the left side of the other), the front end of the heat exchange air duct 110 is provided with a first air port 111 (the first air port 111 is an air outlet), the rear end is provided with a second air port 112 (the second air port 112 is an air inlet), the front end of the heat dissipation air duct 120 is provided with a third air port 121 (the third air port 112 is an air inlet), and the heat dissipation air duct 120 is provided with a third air port 122 (the third air port 112 is an air inlet). 21 is an air inlet), a fourth air outlet 122 is provided at the rear end (the fourth air outlet 122 is an air outlet); a fan assembly 200 and a heat exchanger 300, the fan assembly 200 and the heat exchanger 300 are sequentially arranged in the heat exchange air duct 110 along the axial direction of the heat exchange air duct 110, the fan assembly 200 is arranged to form a wind beam flowing from the second air outlet 112 through the heat exchange air duct 110 to the first air outlet 111, and the guide structure 130 is arranged to guide the wind beam at the first air outlet 111 to flow to the third air outlet 121; an electronic control box 400, the electronic control box 400 is arranged in the heat dissipation air duct 120.
[0030] When the fan assembly 200 is not running, since the heat exchanger 300 is located in the heat exchange air duct 110 and the electric control box 400 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, when the refrigerant leaks (the leaked refrigerant is located in the heat exchange air duct 110), the leaked refrigerant cannot enter the electric control box 400; Figure 5 As shown, when the fan assembly 200 is running, since a part of the wind beam is blown from the first air port 111 to the outside of the heat exchange air duct 110, the other part of the wind beam is blown from the third air port 121 through the heat dissipation air duct 120 and from the fourth air port 122 to the outside of the heat dissipation air duct 120 under the guidance of the drainage structure 130. Therefore, when the refrigerant leaks, the amount of air and the amount of refrigerant entering the heat dissipation air duct 120 are small, and even if a part of the refrigerant in the heat dissipation air duct 120 enters the electric control box 400, the refrigerant concentration in the electric control box 400 will not reach the combustion concentration threshold; therefore, in this scheme, when the refrigerant leaks, the refrigerant combustion or refrigerant explosion will not occur inside the electric control box 400; and, even if the electric control box 400 is not sealed, the refrigerant combustion or refrigerant explosion will not occur inside the electric control box 400.
[0031] It can be, for example Figures 5 to 7 As shown, the heat dissipation duct 120 is located above the heat exchange duct 110; or the heat dissipation duct 120 may be located below the heat exchange duct 110, etc.; all of the above can achieve the purpose of the present application, and its purpose does not deviate from the design concept of the present invention, and will not be repeated here, and should all fall within the protection scope of the present application.
[0032] In some examples, such as Figure 1 , Figures 4 to 7As shown, the air guide structure 130 is an air guide baffle, the third air outlet 121 is located at the rear side of the air guide baffle and faces the air guide baffle, and the projection of the air guide baffle along the axial direction of the heat dissipation air duct 120 is at least partially located in the projection area of the third air outlet 121 along the axial direction of the heat dissipation air duct 120. In this way, a part of the air beam flowing from the second air outlet 112 to the first air outlet 111 through the heat exchange air duct 110 is blown to the outside of the heat exchange air duct 110; another part of the air beam flowing from the second air outlet 112 to the first air outlet 111 through the heat exchange air duct 110 is blown to the air guide baffle, and under the guidance of the air guide baffle, it is blown to the third air outlet 121, and then blown from the fourth air outlet 122 along the heat dissipation air duct 120 to the outside of the heat dissipation air duct 120, so as to achieve heat dissipation and cooling of the electric control box 400.
[0033] To avoid excessive noise from blowing, Figure 1 , Figures 4 to 7 As shown, the width of the guide baffle in the radial direction of the heat exchange air duct 110 should not be too large to ensure that most of the wind beams are blown from the first air outlet 111 to the outside of the heat exchange air duct 110, and a small part of the wind beams are blown from the third air outlet 121 through the heat dissipation air duct 120 and the fourth air outlet 122 to the outside of the heat dissipation air duct 120.
[0034] In some embodiments, Figure 1 , Figure 4 , Figure 5 and Figure 7 As shown, the guide baffle is located in the first air outlet 111 and connected to the peripheral wall of the first air outlet 111, and the third air outlet 121 is located on the inner peripheral surface of the first air outlet 111 and faces the guide baffle. Another part of the wind beam flowing from the second air outlet 112 to the first air outlet 111 through the heat exchange air duct 110 blows toward the guide baffle, forming a high-pressure area on the rear side of the guide baffle. Under the action of wind pressure and the guidance of the guide baffle, the wind beam in the high-pressure area enters the heat dissipation air duct 120 from the third air outlet 121, and then blows along the heat dissipation air duct 120 from the fourth air outlet 122 to the outside of the heat dissipation air duct 120.
[0035] In some embodiments, Figure 5 and Figure 7 As shown, the guide baffle includes an inclined plate segment 131 along the radial direction of the heat exchange air duct 110: the inclined plate segment 131 extends backward from its radial outer end to its radial inner end. In this scheme, the inclined plate segment 131 can better guide the blocked wind beam to flow toward the third air outlet 121.
[0036] In some embodiments, Figure 5 and Figure 7As shown, the guide baffle also includes a vertical plate section 132 erected in the up-down direction, the radial outer end of the inclined plate section 131 is connected to the peripheral wall of the first air outlet 111 through the vertical plate section 132, and a recessed portion 133 is formed between the rear side surface of the inclined plate section 131, the rear side surface of the vertical plate section 132 and the peripheral wall of the first air outlet 111, and the recessed portion 133 is a high-pressure area. Among them, the third air outlet 121 is arranged to be at least partially located in the recessed portion 133 and facing the inclined plate section 131, so that the inclined plate section 131 can better guide the wind beam at the recessed portion 133 from the third air outlet 121 into the heat dissipation air duct 120.
[0037] It can be, for example Figure 5 and Figure 7 As shown, the fan assembly 200 is located at the rear side of the third air outlet 121, and the heat exchanger 300 is located at the rear side of the fan assembly 200. Then, when the fan assembly 200 is running, a wind beam is formed in the heat exchange air duct 110, which flows from the second air outlet 112 to the first air outlet 111 in sequence through the heat exchanger 300 and the fan assembly 200; or, the heat exchanger 300 is located at the front side of the third air outlet 121, and the fan assembly 200 is located at the rear side of the third air outlet 121. Then, when the fan assembly 200 is running, a wind beam is formed in the heat exchange air duct 110, which flows from the second air outlet 112 to the first air outlet 111 in sequence through the heat exchanger 300 and the fan assembly 200. 2 is a wind beam flowing from the fan assembly 200 to the heat exchanger 300; or it may be that the heat exchanger 300 is located at the rear side of the third air outlet 121, and the fan assembly 200 is located at the rear side of the heat exchanger 300, then the fan assembly 200 is operated, and a wind beam is formed in the heat exchange air duct 110, flowing from the second air outlet 112 to the first air outlet 111 through the fan assembly 200 and the heat exchanger 300 in sequence; the above can achieve the purpose of the present application, and its purpose does not deviate from the design concept of the present invention, and will not be repeated here, and should belong to the protection scope of the present application.
[0038] In some examples, such as Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, the electric control box 400 includes a box body, an electric control module and a radiator 430. The electric control module is arranged in the box body, and the radiator 430 is at least partially located outside the box body and connected to the electric control module. The box body includes a bottom box 410 and a cover body 420. The cover body 420 is mounted on the bottom box 410. There is no need to set a sealing structure between the cover body 420 and the bottom box 410. Even if the refrigerant enters the electric control box 400, the amount of the refrigerant entering the electric control box 400 is very small. The concentration of the refrigerant in the electric control box 400 will not reach the combustion concentration threshold, and the concentration of the refrigerant in the electric control box 400 is always much less than the combustion concentration threshold. It can be that the electric control module is set as a variable frequency electric control mainboard.
[0039] In some examples, such as Figure 1 , Figure 3 , Figure 5 and Figure 7 As shown, the heat dissipation air duct 120 includes a first air duct section, a receiving cavity and a second air duct section 124. The first air duct section is located at the front side of the receiving cavity and is connected to the receiving cavity. The third air port 121 is located at the front end of the first air duct section (on the lower side wall), the second air duct section 124 is located at the rear side of the receiving cavity and is connected to the receiving cavity, the fourth air port 122 is located at the rear end of the second air duct section 124, and the electric control box 400 is located in the receiving cavity. The wind beam passes through the first air duct section, the receiving cavity and the second air duct section 124 in sequence from the third air port 121, and finally blows out from the fourth air port 122. In the process of passing through the receiving cavity, the wind beam contacts the radiator 430, takes away the heat on the radiator 430, and realizes heat dissipation and cooling of the electric control module. Among them, the first air duct section and the second air duct section 124 each include two. Of course, the first air duct section can be set to one, three or four, and the second air duct section 124 can be set to one, three or four, etc., all of which can achieve the purpose of this application. The purpose does not deviate from the design concept of the present invention and will not be repeated here. They should all fall within the protection scope of this application.
[0040] In some examples, such as Figure 1 , Figure 5 and Figure 7 As shown, the main body includes: a shell, the shell has a front air outlet 521, a first rear air outlet and a second rear air outlet 532; an air guide ring 600 and a support seat 700, the air guide ring 600 and the support seat 700 are both arranged in the shell, and the support seat 700 is located at the upper rear side of the air guide ring 600, the front end face of the support seat 700 is matched with the rear side face of the upper end of the air guide ring 600, the heat exchange air duct 110 is located between the support seat 700 and the bottom wall of the shell, the heat dissipation air duct 120 is located at the support seat 700 and the air guide ring 600, the first air outlet 111 and the third air outlet 121 are located at the air guide ring 600, the fourth air outlet 122 is located at the support seat 700, the front air outlet 521 is opposite to the first air outlet 111, the first rear air outlet is opposite to the second air outlet 112, and the second rear air outlet 532 is opposite to the fourth air outlet 122. The fan assembly 200 and the heat exchanger 300 are located below the support base 700 , and the fan assembly 200 is located between the air guide ring 600 and the heat exchanger 300 .
[0041] It can be, for example Figure 1 and Figure 3 As shown, the second rear air outlet 232 is located on the peripheral wall of the shell; or it may be that the second rear air outlet 232 is located on the top wall of the shell, etc.; all of the above can achieve the purpose of the present application, and its purpose does not deviate from the design concept of the present invention, and will not be repeated here, and should all fall within the protection scope of the present application.
[0042] In one embodiment, if Figures 3 to 5 , Figure 7As shown, the first air duct section includes a first portion 125 and a second portion 126 , the first portion 125 is located on the upper portion of the air guide ring 600 , the second portion 126 is located on the support seat 700 , and the third air outlet 121 is located on the first portion 125 .
[0043] Among them, Figure 1 , Figure 5 and Figure 7 As shown, the fan assembly 200 includes a fan box 210, a wind wheel 220 and a driving mechanism 230. The wind wheel 220 (the wind wheel 220 is such as an axial flow wind wheel) is located in the fan box 210 and is in driving connection with the driving mechanism 230. The heat exchanger 300 is an arc-shaped heat exchanger (the arc-shaped heat exchanger is such as a C-shaped heat exchanger 300 or a U-shaped heat exchanger 300 or a V-shaped heat exchanger 300, etc.), the concave side of the arc-shaped heat exchanger faces forward, the compressor 800 is arranged on the concave side of the arc-shaped heat exchanger, and the two ends of the arc-shaped heat exchanger located in the circumferential direction of the shell are the same as the ends of the fan box 210 located in the circumferential direction of the shell. The two ends are matched one by one, the fan box 210 is matched with the air guide ring 600, the support seat 700 is located above the arc heat exchanger and the fan box 210, and is sealed with the arc heat exchanger and the fan box 210 (it can be that the support seat 700 and the arc heat exchanger are sealed by sponge; or it can be that the support seat 700 and the arc heat exchanger are sealed by a small gap match, etc.; it can be that the support seat 700 and the fan box 210 are sealed by sponge; or it can be that the support seat 700 and the fan box 210 are abutted and sealed, etc.). The support seat 700 is sealed with the air guide ring 600 (it can be that the support seat 700 and the air guide ring 600 are sealed by sponge; or it can be that the support seat 700 and the air guide ring 600 are abutted and sealed, etc.).
[0044] In addition, if Figure 1 , Figure 3 and Figure 5 As shown, the top surface of the support seat 700 is provided with a receiving groove 123 with an opening facing upward, the electric control box 400 is arranged in the receiving groove 123, the groove cover of the receiving groove 123 is provided with a cover plate 127, and the receiving groove 123 and the cover plate 127 together form a receiving cavity.
[0045] Furthermore, if Figure 1 and Figure 5As shown, the housing includes a water receiving tray 510, an arc-shaped front side plate 520, an arc-shaped rear side plate 530 and a top cover 540 (the notch of the receiving groove 123 can also be sealed by the top cover 540, in which case the cover plate 127 can be omitted, and the structure is simpler). The lower end of the front side plate 520 and the lower end of the rear side plate 530 are both matched with the water receiving tray 510, the upper end of the front side plate 520 and the upper end of the rear side plate 530 are both matched with the top cover 540, and the circumferential ends of the front side plate 520 and the circumferential ends of the rear side plate 530 are matched one by one. The front air outlet 521 is located at the front side plate 520, and an air outlet mesh cover 910 is provided at the front air outlet 521. The first rear air outlet and the second rear air outlet 532 are located at the rear side plate 530. A support plate 920 is also provided between the two ends of the arc-shaped heat exchanger in the circumferential direction of the shell and the fan box 210. The support plate 920 is used to support the support seat 700. Figure 4 and Figure 7 As shown, a process hole 610 is provided at the front end of the first portion 125 , and the upper portion of the rear side surface of the front side plate 520 covers the process hole 610 , so that the process hole 610 is closed.
[0046] The heat pump water heater (not shown in the figure) provided in the embodiment of the present application includes the head assembly of the heat pump water heater described in any of the above embodiments.
[0047] 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.
[0048] To summarize, 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 electrical 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 electrical control box; when the fan assembly is running, since a part of the wind beam is blown from the first air port to the outside of the heat exchange air duct, the other part of the wind beam is blown from the third air port through the heat dissipation air duct and from the fourth air port to the outside of the heat dissipation air duct under the guidance of the drainage structure. Therefore, when the refrigerant leaks, the amount of air and the amount of refrigerant entering the heat dissipation air duct are small, and even if a part of the refrigerant in the heat dissipation air duct enters the electrical control box, the refrigerant concentration in the electrical control box will not 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; and, even if the electrical control box is not sealed, refrigerant combustion or refrigerant explosion will not occur inside the electrical control box.
[0049] 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.
[0050] 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.
[0051] 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: The main body has a heat exchange air duct, a heat dissipation air duct and a drainage structure, wherein one end of the heat exchange air duct is provided with a first air outlet and the other end is provided with a second air outlet, and one end of the heat dissipation air duct is provided with a third air outlet and the other end is provided with a fourth air outlet; A fan assembly and a heat exchanger are sequentially arranged in the heat exchange air duct along the axial direction of the heat exchange air duct, the fan assembly is configured to form a wind beam flowing from the second air outlet through the heat exchange air duct to the first air outlet, and the guide structure is configured to guide the wind beam at the first air outlet to flow to the third air outlet; The electric control box is arranged in the heat dissipation duct.
2. The head assembly according to claim 1, characterized in that: The projection of the drainage structure along the axial direction of the heat dissipation air duct is at least partially located within the projection area of the third air outlet along the axial direction of the heat dissipation air duct, and along the flow direction of the air beam in the heat exchange air duct: the third air outlet is located on the downstream side of the drainage structure and faces the drainage structure.
3. The head assembly according to claim 2, characterized in that: The drainage structure is a drainage baffle, which is located in the first air outlet and connected to the peripheral wall of the first air outlet. The third air outlet is located on the inner peripheral surface of the first air outlet.
4. The head assembly according to claim 3, characterized in that: The guide baffle includes an inclined plate section along the radial direction of the heat exchange air duct: the inclined plate section is inclined from its radial outer end to its radial inner end and extends toward the direction where the second air outlet is located.
5. The head assembly according to claim 4, characterized in that: The deflection baffle further includes a vertical plate section erected in the up-down direction, and the radial outer end of the inclined plate section is connected to the peripheral wall of the first air outlet through the vertical plate section.
6. The head assembly according to any one of claims 1 to 5, characterized in that: Along the flow direction of the air beam in the heat exchange air duct: the fan assembly is located on the downstream side of the third air outlet, and the heat exchanger is located on the downstream side of the fan assembly.
7. The head assembly according to any one of claims 1 to 5, characterized in that: The electric control box comprises a box body, an electric control module and a radiator. The electric control module is arranged in the box body, and the radiator is at least partially located outside the box body and connected to the electric control module.
8. The head assembly according to any one of claims 1 to 5, characterized in that: The heat dissipation air duct comprises a first air duct section, a receiving cavity and a second air duct section which are connected in sequence. The third air outlet is located in the first air duct section, the fourth air outlet is located in the second air duct section, and the electric control box is located in the receiving cavity.
9. The head assembly according to any one of claims 1 to 5, characterized in that: One of the heat exchange air duct and the heat dissipation air duct is located above the other, the first air outlet is located in front of the second air outlet, and the third air outlet is located in front of the fourth air outlet; the main body includes: A housing having a front air outlet, a first rear air outlet and a second rear air outlet; The air guide ring and the support seat are both arranged in the shell, and the support seat is located at the upper rear side of the air guide ring, the heat exchange air duct is located between the support seat and the bottom wall of the shell, the heat dissipation air duct is located between the support seat and the air guide ring, the first air outlet and the third air outlet are located in the air guide ring, the fourth air outlet is located in the support seat, the front air outlet is opposite to the first air outlet, the first rear air outlet is opposite to the second air outlet, and the second rear air outlet is opposite to the fourth air outlet.
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.