Heat pump water heater and machine head assembly thereof
By designing separate heat exchange and heat dissipation ducts in the heat pump water heater and using a diversion structure to guide the airflow, the risk of combustion or explosion is avoided when the refrigerant concentration in the control box reaches the threshold in the event of refrigerant leakage. This also ensures the safety and reliability of preventing combustion or explosion when the refrigerant concentration in the control box does not reach the threshold in the event of refrigerant leakage.
Patent Information
- Application Number
- CN202422952564.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-29
Smart Images
Figure CN223460609U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of heat pump equipment, in particular to a heat pump water heater and a head assembly thereof. BACKGROUND
[0002] The air inlet and outlet mode of the head is side-in and side-out, and the frequency conversion heat pump water heater is an integrated type. The frequency conversion electric control main plate (the control module includes the frequency conversion electric control main plate) generates a large amount of heat. The front surface of the frequency conversion electric control main plate is usually designed with a heat dissipation fin (the heat sink includes the heat dissipation fin). The heat on the heat dissipation fin is taken away by the air flow, so as to realize efficient heat dissipation of the frequency conversion electric control main plate.
[0003] For the integrated type frequency conversion heat pump water heater using flammable and explosive refrigerant, when refrigerant leakage occurs in the head, if the refrigerant enters the electric control box and contacts the flammable electrical device on the frequency conversion electric control main plate, the concentration of the refrigerant in the electric control box reaches the combustion concentration threshold value (the fan assembly is in a non-running state, and the leaked refrigerant is more likely to enter the electric control box, so the concentration of the refrigerant in the electric control box is more likely to reach the combustion concentration threshold value), the refrigerant in the electric control box will be ignited by the electrified flammable electrical device and cause combustion or explosion. Therefore, the frequency conversion electric control main plate needs to be isolated from the refrigerant.
[0004] One solution is that the electric control box is sealed and vertically installed in the heat exchange air duct where the fan assembly, the heat exchanger, the compressor and the pipeline are located. The heat dissipation fin is exposed outside the electric control box. The fan assembly operates, and the air flow formed in the heat exchange air duct takes away the heat on the heat dissipation fin, so as to realize efficient heat dissipation of the frequency conversion electric control main plate. In theory, when refrigerant leakage occurs in the head, the refrigerant cannot enter the inside of the electric control box.
[0005] However, in actual application, due to the large size of the frequency conversion electric control main plate, the large number of lead-out wires of the electric control box and the exposure of the heat dissipation fin outside the electric control box, the position and shape of the bottom box and the cover body of the electric control box are irregular. There are too many and large areas that need to be sealed, and it is extremely difficult to achieve very effective sealing. Therefore, in the actual application process, when refrigerant leakage occurs in the head, the above-mentioned solution still has 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 value, that is, when refrigerant leakage occurs in the head, the inside of the electric control box can still cause refrigerant combustion or refrigerant explosion. INVENTION CONTENTS
[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, a heat dissipation air duct and a flow guide structure, one end of the heat exchange air duct is provided with a first air port, the other end is provided with a second air port, one end of the heat dissipation air duct is provided with a third air port, the other end is provided with a fourth air port; a fan assembly and a heat exchanger, which 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 port to the first air port through the heat exchange air duct, and the flow guide structure is arranged to guide the wind beam at the first air port to flow to the third air port; and an electric control box arranged in the heat dissipation air duct.
[0007] In some example embodiments, a projection of the flow guide structure along the axial direction of the heat dissipation air duct is at least partially located in a projection area of the third air port along the axial direction of the heat dissipation air duct, and along the flow direction of the wind beam in the heat exchange air duct: the third air port is located on the downstream side of the flow guide structure and is directed towards the flow guide structure.
[0008] In some example embodiments, the flow guide structure is a flow guide baffle, the flow guide baffle is located in the first air port and connected with the peripheral wall of the first air port, and the third air port is located on the inner peripheral surface of the first air port.
[0009] In some example embodiments, the flow guide baffle comprises an inclined plate segment, and along the radial direction of the heat exchange air duct: the inclined plate segment extends from the radial outer end thereof to the radial inner end thereof and is inclined towards the direction in which the second air port is located.
[0010] In some example embodiments, the flow guide baffle further comprises a vertical plate segment arranged vertically along the up-down direction, and the radial outer end of the inclined plate segment is connected with the peripheral wall of the first air port through the vertical plate segment.
[0011] In some example embodiments, along the flow direction of the wind beam in the heat exchange air duct: the fan assembly is located on the downstream side of the third air port, and the heat exchanger is located on the downstream side of the fan assembly.
[0012] In some example embodiments, the electric control box comprises a box body, an electric control module and a heat sink, the electric control module is arranged in the box body, and the heat sink is at least partially located outside the box body and connected with the electric control module.
[0013] In some example embodiments, the heat dissipation air duct comprises a first air duct segment, a containing cavity and a second air duct segment which are sequentially connected, the third air port is located in the first air duct segment, the fourth air port is located in the second air duct segment, and the electric control box is located in the containing cavity.
[0014] In some example 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 comprises: 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 on 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.
[0015] The application also provides a heat pump water heater comprising the head assembly of any of the above embodiments.
[0016] The technical scheme provided by 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 refrigerant leaks, the leaked refrigerant cannot enter the electric control box; when the fan assembly is running, part of the air flow is blown out of the heat exchange air duct from the first air outlet, and the other part of the air flow is guided by the flow guide structure to pass through the heat dissipation air duct from the third air outlet to the fourth air outlet, so that when refrigerant leaks, the amount of air entering the heat dissipation air duct is small, and the amount of refrigerant is small, even if part of the refrigerant in the heat dissipation air duct enters the electric control box, the concentration of the refrigerant in the electric control box will not reach the combustion concentration threshold; therefore, in the case of refrigerant leakage, the internal part of the electric control box will not burn or explode; and even if the electric control box is not sealed, the internal part of the electric control box will not burn or explode.
[0017] Other features and advantages of the application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the application can be realized and achieved by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0018] The accompanying drawings are included to provide a further understanding of the technical scheme of the application, and constitute a part of the specification, and are used together with the embodiments of the application to explain the technical scheme of the application, and do not constitute a limitation on the technical scheme of the application.
[0019] Figure 1 The exploded structural schematic view of the head assembly provided for some embodiments of the application;
[0020] Figure 2 The exploded structural schematic view of the head assembly provided for some embodiments of the application;Figure 1 Structure diagram of the electric control box;
[0021] Figure 3 For Figure 1 Structure diagram of the support seat;
[0022] Figure 4 For Figure 1 Structure diagram of the air guide ring;
[0023] Figure 5 For Figure 1 Structure diagram of the head assembly shown in the figure, the cutting position is along the area where the air flow passes through the heat dissipation air duct, and the arrow indicates the air flow direction;
[0024] Figure 6 For Figure 1 Structure diagram of the head assembly shown in the figure, the cutting position is along the area where the air flow passes through the heat dissipation air duct, and the arrow indicates the air flow direction;
[0025] Figure 7 For Figure 6 Structure diagram of the head assembly shown in the figure, the cutting position is along the area where the air flow passes through the heat dissipation air duct, and the arrow indicates the air flow direction.
[0026] In the drawings, the components represented by each reference numeral are listed as follows:
[0027] 110 heat exchange air duct, 111 first air port, 112 second air port, 120 heat dissipation air duct, 121 third air port, 122 fourth air port, 123 accommodating groove, 124 second air duct section, 125 first part, 126 second part, 127 cover plate, 130 flow guide structure, 131 inclined plate section, 132 vertical plate section, 133 recess, 200 fan assembly, 210 fan box, 220 fan wheel, 230 driving mechanism, 300 heat exchanger, 400 electric control box, 410 bottom box, 420 cover body, 430 heat sink, 510 water receiving tray, 520 front side plate, 521 front air port, 530 rear side plate, 532 second rear air port, 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 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 in the present application and the features in the embodiments can be combined with each other arbitrarily without conflict.
[0029] The head assembly of the heat pump water heater provided by the embodiments of the present application, like 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 way 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 outlet 111 (the first air outlet 111 is an air outlet), the rear end is provided with a second air outlet 112 (the second air outlet 112 is an air inlet), the front end of the heat dissipation air duct 120 is provided with a third air outlet 121 (the third air outlet 112 is an air inlet), and the heat dissipation air duct 120 is provided with a third air outlet 122 (the third air outlet 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 arranged in the heat exchange air duct 110 in sequence 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 diversion 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. Therefore, 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 air beam is blown from the first air port 111 to the outside of the heat exchange air duct 110, the other part of the air beam is guided by the drainage structure 130 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. Therefore, when the refrigerant leaks, the air volume and refrigerant volume entering the heat dissipation air duct 120 are small. Even if a part of the refrigerant in the heat dissipation air duct 120 enters the electrical control box 400, the refrigerant concentration in the electrical control box 400 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 400; and even if the electrical control box 400 is not sealed, refrigerant combustion or refrigerant explosion will not occur inside the electrical 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 this application, and its purpose does not deviate from the design concept of the present utility model, and will not be repeated here, and should all fall within the scope of protection of this application.
[0032] In some examples, such as Figure 1 、 Figures 4 to 7As shown, the flow guide structure 130 is a flow guide baffle, the third air port 121 is located at the back side of the flow guide baffle and faces the flow guide baffle, and the projection of the flow 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 port 121 along the axial direction of the heat dissipation air duct 120. In this way, a part of the air flow from the second air port 112 to the first air port 111 through the heat exchange air duct 110 blows out of the heat exchange air duct 110; another part of the air flow from the second air port 112 to the first air port 111 through the heat exchange air duct 110 blows towards the flow guide baffle and then blows towards the third air port 121 under the guidance of the flow guide baffle, and then blows out of the heat dissipation air duct 120 at the fourth air port 122 along the heat dissipation air duct 120, thereby achieving the heat dissipation and cooling of the electric control box 400.
[0033] In order to avoid excessive blowing noise, as shown in Figure 1 , Figures 4 to 7 , the width of the flow guide baffle in the radial direction of the heat exchange air duct 110 should not be too large, so as to ensure that most of the air flow blows from the first air port 111 to the outside of the heat exchange air duct 110, and a small part of the air flow blows from the third air port 121 to the outside of the heat dissipation air duct 120 through the heat dissipation air duct 120 at the fourth air port 122.
[0034] In some embodiments, as shown in Figure 1 , Figure 4 , Figure 5 and Figure 7 , the flow guide baffle is located in the first air port 111 and connected to the peripheral wall of the first air port 111, and the third air port 121 is located on the inner peripheral surface of the first air port 111 and faces the flow guide baffle. Another part of the air flow from the second air port 112 to the first air port 111 through the heat exchange air duct 110 blows towards the flow guide baffle, forming a high pressure area at the back side of the flow guide baffle, and the air flow in the high pressure area enters the heat dissipation air duct 120 under the action of air pressure and the guidance of the flow guide baffle, and then blows out of the heat dissipation air duct 120 at the fourth air port 122 along the heat dissipation air duct 120.
[0035] In some embodiments, as shown in Figure 5 and Figure 7 , the flow guide baffle includes an inclined plate segment 131, which extends rearwardly and inclines from the radial outer end to the radial inner end of the heat exchange air duct 110. This scheme can better guide the air flow blocked by the inclined plate segment 131 to flow towards the third air port 121.
[0036] In some embodiments, as shown in Figure 5 and Figure 7As shown, the flow guide baffle further comprises a vertical plate segment 132 vertically erected along the up-down direction, the radially outer end of the inclined plate segment 131 is connected with the peripheral wall of the first air port 111 through the vertical plate segment 132, a recess 133 is formed between the rear side of the inclined plate segment 131, the rear side of the vertical plate segment 132 and the peripheral wall of the first air port 111, and the recess 133 is a high pressure area. The third air port 121 is arranged to be at least partially located in the recess 133 and faces the inclined plate segment 131, so that the inclined plate segment 131 can better guide the air flow from the third air port 121 into the heat dissipation air duct 120 at the recess 133.
[0037] As shown in Figure 5 and Figure 7 , the fan assembly 200 is located at the rear side of the third air port 121, and the heat exchanger 300 is located at the rear side of the fan assembly 200. When the fan assembly 200 operates, the air flow in the heat exchange air duct 110 flows from the second air port 112 to the first air port 111 through the heat exchanger 300 and the fan assembly 200 in sequence. Alternatively, the heat exchanger 300 is located at the front side of the third air port 121, and the fan assembly 200 is located at the rear side of the third air port 121. When the fan assembly 200 operates, the air flow in the heat exchange air duct 110 flows from the second air port 112 to the heat exchanger 300 through the fan assembly 200. Alternatively, the heat exchanger 300 is located at the rear side of the third air port 121, and the fan assembly 200 is located at the rear side of the heat exchanger 300. When the fan assembly 200 operates, the air flow in the heat exchange air duct 110 flows from the second air port 112 to the first air port 111 through the fan assembly 200 and the heat exchanger 300 in sequence. 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. All of them should be within the protection scope of the present application.
[0038] As shown in Figure 1 , Figure 2 , Figure 5 and Figure 7 , the electric control box 400 comprises a box body, an electric control module and a heat sink 430. The electric control module is arranged in the box body, and the heat sink 430 is at least partially located outside the box body and connected with the electric control module. The box body comprises a bottom box 410 and a cover 420. The cover 420 is covered on the bottom box 410. No sealing structure is required between the cover 420 and the bottom box 410. Even if the refrigerant enters the electric control box 400, the amount of refrigerant entering the electric control box 400 is very small, and the concentration of refrigerant in the electric control box 400 will not reach the combustion concentration threshold. Moreover, the concentration of refrigerant in the electric control box 400 is always far less than the combustion concentration threshold. The electric control module can be a variable frequency electric control mainboard.
[0039] As shown in Figure 1 , Figure 3 , Figure 5 andFigure 7 As shown, the heat dissipation air duct 120 includes a first air duct section, a containing cavity and a second air duct section 124, the first air duct section is located at the front side of the containing cavity and communicates with the containing cavity, the third air outlet 121 is located at the front end (of the lower side wall) of the first air duct section, the second air duct section 124 is located at the rear side of the containing cavity and communicates with the containing cavity, the fourth air outlet 122 is located at the rear end of the second air duct section 124, and the electric control box 400 is located in the containing cavity. The air flow passes through the first air duct section, the containing cavity and the second air duct section 124 in turn from the third air outlet 121, and finally blows out from the fourth air outlet 122. In the process of passing through the containing cavity, the air flow contacts the heat sink 430 and carries away the heat on the heat sink 430, thereby achieving the purpose of cooling the electric control module. The first air duct section and the second air duct section 124 each include two. Of course, the first air duct section can be provided as one, three or four, and the second air duct section 124 can be provided as one, three or four. 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. They all belong to the protection scope of the present application.
[0040] In some examples, as shown in Figure 1 , Figure 5 and Figure 7 , the main body includes: a shell having 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, both of which are 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 cooperates 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 between the support seat 700 and the air guide ring 600, the first air outlet 111 and the third air outlet 121 are located in the air guide ring 600, the fourth air outlet 122 is located in 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 seat 700, and the fan assembly 200 is located between the air guide ring 600 and the heat exchanger 300.
[0041] It can be, as shown in Figure 1 and Figure 3 , the second rear air outlet 232 is located on the peripheral wall of the shell; or it can be, the second rear air outlet 232 is located on the top wall of the shell, etc. 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. They all belong to the protection scope of the present application.
[0042] In an embodiment, as shown in Figures 3 to 5 , Figure 7As shown, the first air duct section includes a first part 125 and a second part 126, the first part 125 is located at the upper part of the air guide ring 600, and the second part 126 is located at the support base 700, and the third air port 121 is located at the first part 125.
[0043] As shown in Figure 1 , Figure 5 and Figure 7 , the fan assembly 200 includes a fan box 210, a fan wheel 220, and a driving mechanism 230, the fan wheel 220 (such as an axial flow fan 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 (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 at 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 matched with the two ends of the fan box 210 located in the circumferential direction of the shell one by one. The fan box 210 is matched with the air guide ring 600, and the support base 700 is located above the arc-shaped heat exchanger and the fan box 210 and is in sealing cooperation with the arc-shaped heat exchanger and the fan box 210 (it can be that the support base 700 and the arc-shaped heat exchanger are sealed by sponge; or it can be that the support base 700 and the arc-shaped heat exchanger are in sealing cooperation in the way of small gap, etc.; it can be that the support base 700 and the fan box 210 are sealed by sponge; or it can be that the support base 700 and the fan box 210 are in abutting sealing, etc.). The support base 700 is in sealing cooperation with the air guide ring 600 (it can be that the support base 700 and the air guide ring 600 are sealed by sponge; or it can be that the support base 700 and the air guide ring 600 are in abutting sealing, etc.).
[0044] In addition, as shown in Figure 1 , Figure 3 and Figure 5 , the top surface of the support base 700 is provided with an accommodating groove 123 with an opening facing upward, the electric control box 400 is arranged in the accommodating groove 123, the groove opening of the accommodating groove 123 is covered with a cover plate 127, and the accommodating groove 123 and the cover plate 127 jointly form an accommodating cavity.
[0045] Furthermore, as shown in Figure 1 and Figure 5As shown, the shell comprises a water pan 510, an arc-shaped front side plate 520, an arc-shaped rear side plate 530 and a top cover 540 (the slot opening of the containing 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 matched with the water pan 510. The upper end of the front side plate 520 and the upper end of the rear side plate 530 are matched with the top cover 540. 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 port 521 is located on the front side plate 520, and the front air port 521 is provided with an air outlet mesh cover 910. The first rear air port and the second rear air port 532 are located on the rear side plate 530. The arc-shaped heat exchanger is provided with a support vertical plate 920 between the circumferential ends of the shell and the fan box 210, and the support vertical plate 920 is used to support the support seat 700. As shown in Figure 4 and Figure 7 As shown, the front end of the first part 125 is provided with a process hole 610, and the upper part of the rear side 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 by the embodiment of the present application comprises the head assembly of the heat pump water heater of any of the above-mentioned 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-mentioned embodiments, and will not be described here.
[0048] In summary, the technical scheme provided by the embodiment of the present 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. Therefore, when the refrigerant leaks, the leaked refrigerant cannot enter the electric control box. When the fan assembly is running, a part of the wind beam blows from the first air port to the outside of the heat exchange air duct, and another part of the wind beam blows from the third air port to the outside of the heat dissipation air duct through the heat dissipation air duct under the guidance of the flow guide structure. Therefore, when the refrigerant leaks, the amount of air entering the heat dissipation air duct is small, and the amount of refrigerant is small. Even if a part of the refrigerant in the heat dissipation air duct enters the electric control box, the concentration of the refrigerant in the electric control box will not reach the combustion concentration threshold. Therefore, in this scheme, the internal part of the electric control box will not burn or explode when the refrigerant leaks. Moreover, even if the electric control box is not sealed, the internal part of the electric control box will not burn or explode.
[0049] In the description of 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, and are only for the convenience of describing the utility model and simplifying the description, and do 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 limiting the utility model.
[0050] In the description of the utility model embodiment, unless otherwise explicitly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; the terms "installation", "connection", "fixed connection" can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.
[0051] Although the embodiments disclosed by the utility model are as above, the content described is only the embodiment adopted for the convenience of understanding 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 heat pump water heater comprises: a main body having a heat exchange air duct, a heat dissipation air duct and a flow guide structure, one end of the heat exchange air duct being provided with a first air port and the other end being provided with a second air port, one end of the heat dissipation air duct being provided with a third air port and the other end being provided with a fourth air port; a fan assembly and a heat exchanger arranged in the heat exchange air duct in sequence along the axial direction of the heat exchange air duct, the fan assembly being arranged to form an air flow from the second air port to the first air port through the heat exchange air duct, and the flow guide structure being arranged to guide the air flow at the first air port to the third air port; an electric control box arranged in the heat dissipation air duct.
2. The nose assembly of claim 1, wherein, The projection of the flow guide structure along the axial direction of the heat dissipation air duct is at least partially located in the projection area of the third air port along the axial direction of the heat dissipation air duct, and along the flow direction of the air flow in the heat exchange air duct, the third air port is located on the downstream side of the flow guide structure and faces the flow guide structure.
3. The nose assembly of claim 2, wherein, The flow guide structure is a flow guide baffle, the flow guide baffle is located in the first air port and connected with the peripheral wall of the first air port, and the third air port is located on the inner peripheral surface of the first air port.
4. The nose assembly of claim 3, wherein, The flow guide baffle comprises an inclined plate segment, and along the radial direction of the heat exchange air duct, the inclined plate segment extends from the radial outer end to the radial inner end thereof in a direction inclined towards the second air port.
5. The nose assembly of claim 4, wherein, The flow guide baffle further comprises a vertical plate segment arranged vertically along the up-down direction, and the radial outer end of the inclined plate segment is connected with the peripheral wall of the first air port through the vertical plate segment.
6. The handpiece assembly of any one of claims 1 to 5, wherein, Along the flow direction of the air flow in the heat exchange air duct, the fan assembly is located on the downstream side of the third air port, and the heat exchanger is located on the downstream side of the fan assembly.
7. The handpiece assembly of any one of claims 1 to 5, wherein, The electric control box comprises a box body, an electric control module arranged in the box body, and a heat sink at least partially located outside the box body and connected with the electric control module.
8. The handpiece assembly of any one of claims 1 to 5, wherein, The heat dissipation air duct comprises a first air duct segment, a containing cavity and a second air duct segment connected in sequence, the third air port is located in the first air duct segment, the fourth air port is located in the second air duct segment, and the electric control box is located in the containing cavity.
9. The handpiece assembly of any one of claims 1 to 5, wherein, One of the heat exchange air duct and the heat dissipation air duct is located above the other, the first air port is located on the front side of the second air port, and the third air port is located on the front side of the fourth air port; the main body comprises: a shell having a front air port, a first rear air port and a second rear air port; an air guide ring and a support seat, both arranged in the shell, and the support seat is located on 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 port and the third air port are located in the air guide ring, the fourth air port is located in the support seat, the front air port is opposite to the first air port, the first rear air port is opposite to the second air port, and the second rear air port is opposite to the fourth air port.
10. A heat pump water heater, characterized by, The machine head assembly of the heat pump water heater comprises any one of the heat pump water heaters according to claims 1 to 9.