Air duct joint and heat pump water heater

Abstract

The utility model belongs to air energy heat exchange equipment technical field, specifically disclose a kind of air pipe joint, air pipe joint is used to connect air pipe assembly and the host of heat pump water heater, air pipe assembly includes inner tube and outer tube, and air pipe joint includes joint main body and end, and the wind cavity is formed in joint main body inside, and still be provided with the first vent, second vent and the exit of communicating wind cavity on joint main body, and the inner diameter of exit is greater than the inner diameter of first vent. The heat pump water heater of application above-mentioned air pipe joint is easy to install, and the requirement of low installation environment.

Description

Technical Field

[0001] This utility model relates to the technical field of air source heat exchange equipment, and in particular to a duct connector and a heat pump water heater. Background Technology

[0002] Heat pump water heaters typically have an air inlet and an air outlet, which are not coaxial. In order to introduce outdoor air into the heat pump water heater and to expel the hot air generated inside the heat pump water heater to the outside, a pipe needs to be connected to each of the air inlet and the air outlet, and two holes need to be made in the wall for the two pipes to pass through to the outside. The two pipes occupy a lot of space, have high requirements for the installation environment, and require the two pipes to pass through the holes made in the wall, making the installation difficult. Utility Model Content

[0003] One of the technical problems solved by this utility model is to provide a duct connector that can reduce the installation difficulty of heat pump water heaters and has low requirements for the installation environment.

[0004] The second technical problem solved by this utility model is to provide a heat pump water heater that is easy to install and has low requirements for the installation environment.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] A duct connector includes a connector body, an air cavity is formed inside the connector body, and a first vent, a second vent, and a through-hole are provided on the connector body to communicate with the air cavity. The inner diameter of the through-hole is larger than the inner diameter of the first vent.

[0007] Compared with the prior art, the duct connector of this utility model has the following advantages: The duct connector is designed to connect the air inlet and air outlet of the heat pump water heater through the connector body, and is used to introduce air into the room and to lead air out of the room through two pipes. One of them can be inserted into the first vent of the connector body to connect to the air inlet or air outlet of the heat pump water heater, and then pass out from the through-outlet. The other can be sleeved on the pipe that passes out from the through-outlet and connect to the air cavity inside the connector body through the through-outlet to connect to the air outlet or air inlet. That is, the duct connector can nest the pipe that introduces air into the room and the pipe that leads air out of the room, which not only reduces the space occupied and the environmental requirements for the installation environment, but also only requires drilling a hole in the wall, reducing the installation difficulty of the heat pump water heater.

[0008] In one embodiment, there are at least two outlets, each with a different direction, and the duct connector further includes an end cap, which is selectively fitted onto any of the outlets.

[0009] In one embodiment, the first vent and the second vent are disposed at the bottom of the connector body, and the through outlet includes a first through outlet, which is disposed at the top of the connector body and coaxially disposed with the first vent.

[0010] In one embodiment, the first vent and the second vent are disposed at the bottom of the connector body, and the through-hole includes a second through-hole disposed on the side of the connector body, wherein the axis of the second through-hole and the axis of the first vent are located in the same vertical plane.

[0011] In one embodiment, the connector body includes an upper housing and a lower housing, the first vent and the second vent are both disposed on the lower housing, and the second through-hole is formed by the upper housing and the lower housing together.

[0012] In one embodiment, one of the upper housing and the lower housing is provided with a connecting recess, and the other of the upper housing and the lower housing is provided with a connecting protrusion. The upper housing is connected to the lower housing through the mutually cooperating connecting protrusion and connecting recess.

[0013] In one embodiment, a second plug portion is further provided on the connecting protrusion, and a plurality of second plug portions are spaced apart on the connecting protrusion.

[0014] In one embodiment, a limiting step is formed on the inner wall of the first vent; and / or, the second vent is configured as a funnel shape with an inner diameter that gradually increases from one end connected to the air cavity to the other end.

[0015] In one embodiment, the connector body has a protruding annular first insertion portion coaxial with the through-hole.

[0016] The second technical problem mentioned above is solved by the following technical solution:

[0017] A heat pump water heater includes a main unit, a duct assembly, and a duct connector as described above. The main unit has an air inlet and an air outlet. The duct connector is connected to the main unit and is connected to the air inlet and the air outlet through a first vent and a second vent, respectively. The duct assembly includes an inner tube and an outer tube. One end of the inner tube passes through the first vent, and the other end of the inner tube passes through any of the outlets. The outer tube is sleeved on the inner tube and fixed to the outlet. A first ventilation channel is formed between the inner tube and the outer tube.

[0018] Compared with the prior art, the heat pump water heater described in this utility model has the following advantages: the inner tube in the duct assembly can be inserted into the first ventilation port of the connector body to connect to the air inlet or outlet of the heat pump water heater, and then pass out from the outlet. The outer tube can be sleeved on the inner tube and connect to the air cavity inside the connector body through the outlet, thereby connecting to the air outlet or air inlet. The nested duct assembly not only reduces the space occupied and lowers the environmental requirements for the installation environment, but also only requires drilling a hole in the wall for the duct assembly to pass through, reducing the installation difficulty of the heat pump water heater. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the duct connector provided in the embodiment of this utility model;

[0020] Figure 2 This is an exploded structural diagram of the duct joint provided in the embodiments of this utility model;

[0021] Figure 3 This is a cross-sectional view of the duct connector provided in one embodiment of the present utility model from one angle;

[0022] Figure 4 This is a cross-sectional view of the duct connector provided in this embodiment of the present utility model from another angle;

[0023] Figure 5 This is a structural schematic diagram of the upper shell at one angle provided in an embodiment of the present utility model;

[0024] Figure 6 This is a structural schematic diagram of the upper shell provided in another embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the lower housing provided in an embodiment of the present utility model;

[0026] Figure 8 This is a cross-sectional view of the duct assembly provided in this embodiment of the present invention assembled at the first through-outlet of the duct joint;

[0027] Figure 9 This is a cross-sectional view of the duct assembly provided in this embodiment of the present invention assembled at the second through-outlet of the duct joint;

[0028] Figure 10 This is a schematic diagram of the structure of the heat pump water heater provided in the embodiment of this utility model;

[0029] Figure 11 This is a partial cross-sectional view of the duct assembly provided in this embodiment of the present invention assembled in a heat pump water heater;

[0030] Figure 12This is a schematic diagram of the structure of the fan cover of the heat pump water heater provided in the embodiment of this utility model.

[0031] Label Explanation:

[0032] 10. Duct connector; 1. Connector body; 11. Upper shell; 111. Upper enclosure; 112. Upper flange; 113. Connecting protrusion; 114. Second insertion part; 12. Lower shell; 121. Lower enclosure; 122. First vent; 123. Second vent; 124. Lower flange; 125. Connecting recess; 127. Limiting step; 127a. First limiting step; 127b. Second limiting step; 128. First protrusion; 129. Second protrusion; 13. Through-hole; 13a. First through-hole; 13b. Second through-hole; 14. First insertion part; 2. End cap; 21. Slot;

[0033] 20. Duct assembly; 201. Inner duct; 2011. Bend; 2012. Straight duct; 202. Outer duct; 203. First ventilation duct; 204. Second ventilation duct;

[0034] 30. Main unit; 301. Fan cover; 3011. Air inlet; 3012. Air outlet; 3013. Third connector; 3014. Fourth connector; 302. Heat pump unit. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] This utility model provides a duct connector 10 and a heat pump water heater in its embodiments. The duct connector 10 can be used in air source heat exchange equipment, including but not limited to heat pump water heaters. Figures 10-12 As shown, the heat pump water heater includes a main unit 30, a duct assembly 20, and the aforementioned duct connector 10. The main unit 30 includes a heat pump unit 302 and a fan cover 301. The fan cover 301 is mounted on the heat pump unit 302. The fan cover 301 has an air inlet 3011 and an air outlet 3012. The duct connector 10 connects the air inlet 3011, the air outlet 3012, and the duct assembly 20.

[0040] The duct assembly 20 includes an inner duct 201 and an outer duct 202 sleeved on the inner duct 201. A first ventilation channel 203 is formed between the inner duct 201 and the outer duct 202, and a second ventilation channel 204 is formed inside the inner duct 201. Specifically, the inner duct 201 and the outer duct 202 are coaxially arranged to improve the uniformity of airflow within the first ventilation channel 203.

[0041] refer to Figure 1 and Figure 2As shown, the duct connector 10 includes a connector body 1 and a cap 2. The connector body 1 has an internal air cavity. The connector body 1 also has a first ventilation port 122, a second ventilation port 123, and a through-hole 13 connected to the air cavity. The first ventilation port 122 and the second ventilation port 123 are used to connect the air inlet 3011 and the air outlet 3012, respectively. One end of the inner tube 201 is inserted into the first ventilation port 122, and the other end extends out of the through-hole 13. The outer tube 202 is fixedly connected to the second ventilation port 123. It should be emphasized that the inner diameter of the through-hole 13 is larger than the inner diameter of the first ventilation port 122, so that when the inner tube 201 connected to the first ventilation port 122 of the connector body 1 extends out of the through-hole 13, a gap is formed between it and the through-hole 13, thereby connecting the second ventilation channel 204 and the air cavity. When installing the heat pump water heater, the inner tube 201 in the duct assembly 20 can be inserted into the first ventilation port 122 of the connector body 1 to connect to the air inlet 3011 or air outlet 3012 of the heat pump water heater, and then pass out through the outlet 13. The outer tube 202 can be sleeved on the inner tube 201 and connected to the air cavity inside the connector body 1 through the outlet 13, thereby connecting to the air outlet 3012 or air inlet 3011. That is, the setting of the duct connector 10 allows the air outlet and air inlet pipes to be nested to form the duct assembly 20, which not only reduces the space occupied and reduces the environmental requirements of the installation environment, but also only requires drilling a hole in the wall for the duct assembly 20 to pass through, reducing the installation difficulty of the heat pump water heater. It is understandable that the first vent 122 can serve as both an air inlet and an air outlet for the connector body 1. When the first vent 122 is the air inlet and the second vent 123 is the air outlet, outdoor air enters the air cavity of the connector body 1 through the first ventilation channel 203, then enters the main unit of the air source heat exchanger through the second vent 123 and the air inlet 3011 for heat exchange, and then enters the second ventilation channel 204 through the air outlet 3012 and the first vent 122 before being discharged outdoors. At this time, the first vent... The air duct 203 is the air inlet duct, and the second ventilation duct 204 is the air outlet duct. When the first ventilation port 122 is the air outlet and the second ventilation port 123 is the air inlet, outdoor air enters the second ventilation duct 204 and then enters the main unit through the first ventilation port 122 and the air inlet 3011 for heat exchange. After heat exchange, it enters the air cavity of the connector body 1 through the air outlet 3012 and the second ventilation port 123, and then is discharged to the outside through the first ventilation duct 203. At this time, the first ventilation duct 203 is the air outlet duct and the second ventilation duct 204 is the air inlet duct.

[0042] In some embodiments, based on the placement of the air inlet and outlet on the duct assembly 20 (the air inlet is located on the side wall of the outer duct 202, and the air outlet is located at the end of the inner duct 201 that extends out of the outer duct 202), air enters from the second ventilation channel 204 and exits through the first ventilation channel 203. In this configuration, the first vent 122 is the air inlet, and the second vent 123 is the air outlet. At this time, refer to... Figure 3 As shown, the second vent 123 is configured as a funnel shape with an inner diameter that gradually increases from one end of the connecting air cavity to the other end, which is conducive to increasing the air intake of the air source heat exchange equipment and improving energy efficiency.

[0043] In some embodiments, the inner pipe 201 of the duct assembly 20 is a 75mm diameter PVC pipe, and the outer pipe 202 is a 125mm diameter PVC pipe. Therefore, the design size of the first ventilation opening 122 should allow the insertion of a 75mm diameter PVC pipe, while the size of the through-hole 13 should allow the insertion or connection of a 125mm diameter PVC pipe. In actual design, the sizes of the through-hole 13 and the first ventilation opening 122 can be adaptively adjusted according to the diameter of the pipe used in the duct assembly 20.

[0044] To further improve applicability, there are at least two outlets 13, with different orientations, so that the duct assembly 20 can pass through holes opened in different directions to the outside. In addition, the duct connector 10 also includes a cap 2, which is selectively fitted to any of the outlets 13.

[0045] According to the actual installation requirements, one end of the inner tube 201 of the duct assembly 20 is inserted into the first ventilation port 122 and fixedly connected to the connector body 1. The other end can be selected to pass through any outlet 13 from different directions to exit the connector body 1. Other outlets 13 are blocked by the end cap 2. Then, the outer tube 202 is fixed to the outlet 13 through which the inner tube 201 passes to form the first ventilation channel 203 connecting the ventilation cavity, which meets the requirements of coaxial air inlet and outlet and adapts to the duct requirements of various installation scenarios. In some embodiments, the air inlet 3011 and the air outlet 3012 are both located on the top of the main unit 30. In this case, the first vent 122 and the second vent 123 are both located at the bottom of the connector body 1. In some installation scenarios, the duct assembly 20 needs to pass through the ceiling above the air source heat exchange equipment. Based on this, the outlet 13 includes a first outlet 13a coaxial with the first vent 122. In this case, the inner tube 201 and the outer tube 202 of the duct assembly 20 can both be straight tubes, for example, the inner tube 201 and the outer tube 202 are both PVC straight tubes.

[0046] In other installation scenarios, the duct assembly 20 extends from the wall on the side of the air source heat exchanger. To improve the applicability of these installation scenarios, refer to... Figure 4As shown, the outlet 13 includes a second outlet 13b disposed on the side of the connector body 1. The axis of the second outlet 13b is located in the same vertical plane as the axis of the first vent 122. At this time, the inner pipe 201 in the duct assembly 20 includes a straight pipe section 2012 and a bent pipe section 2011. One end of the bent pipe section 2011 is connected to the outlet 13, and the other end is connected to the straight pipe section 2012. The end of the straight pipe section 2012 away from the bent pipe section 2011 extends out from the second outlet 13b.

[0047] Furthermore, multiple second through-outlets 13b are provided, and at least two of the second through-outlets 13b have collinear axes, meaning the two second through-outlets 13b face opposite directions, allowing the duct assembly 20 to exit from two walls facing opposite directions respectively. For example, three second through-outlets 13b are provided, with two having collinear axes and the axis of the third perpendicular to the other two. Of course, depending on the actual installation scenario, two, four, or five second through-outlets 13b can also be provided; no specific limitation is made here, and the angle between the line connecting the second through-outlet 13b and the first vent 122 and the second vent 123 can also be adjusted according to actual needs.

[0048] Taking the example where the through-wall opening for the duct assembly is located in the ceiling above the air source heat exchange equipment, the duct assembly 20 should be installed according to the following reference: Figure 8 As shown, the second outlet 13b is sealed by the end cap 2. One end of the inner tube 201 is inserted into the first ventilation port 122, and the other end passes through the first outlet 13a and forms a gap with the first outlet 13a. The outer tube 202 can be connected to the first outlet 13a of the connector body 1 to connect the first ventilation channel 203 and the air cavity.

[0049] For example, when the through-wall hole is located in the wall to which one of the second through-outlets 13b points, refer to Figure 9 As shown, the first through-hole 13a and the remaining second through-holes 13b are all sealed by the end cap 2. One end of the inner tube 201 is inserted into the first ventilation port 122, and the other end passes through the second through-hole 13b and forms a gap with the second through-hole 13b. The outer tube 202 can be connected to the second through-hole 13b of the connector body 1 to connect the first ventilation channel 203 and the air cavity.

[0050] refer to Figure 5As shown, to reduce the difficulty of connecting the outer tube 202 and the end cap 2 to the duct connector 10, the connector body 1 is also provided with a protruding annular first insertion part 14 coaxial with the outlet 13. The end cap 2 and the outer tube 202 can both be fitted onto the first insertion part 14 to achieve an interference fit with the connector body 1. Correspondingly, the end cap 2 is provided with a slot 21 for the first insertion part 14 to be inserted, so as to further improve the stability of the connection between the end cap 2 and the connector body 1. It can be understood that the specific shape of the first insertion part 14 is adapted to the current state of the outer tube 202. For example, when the outer tube 202 is a round tube, the first insertion part 14 is a ring; when the outer tube 202 is a square tube, the first insertion part 14 is a square ring. Based on the premise that the outer tube 202 is usually a round tube, in some embodiments, the first insertion part 14 is annular.

[0051] At the same time, refer to Figures 7-9 As shown, in order to limit the depth of the inner tube 201 inserted into the connector body 1, a limiting step 127 is formed on the inner wall of the first vent 122, and one end of the inner tube 201 located in the connector body 1 can abut against the limiting step 127.

[0052] refer to Figure 7 As shown, in order to facilitate the assembly of the connector body 1 at the air inlet 3011 and the air outlet 3012, the connector body 1 includes a first protrusion 128 and a second protrusion 129. The first ventilation port 122 is formed on the first protrusion 128, and the second ventilation port 123 is formed on the second protrusion 129.

[0053] Understandably, the temperature difference between the air flowing inside the inner tube 201 and the air flowing in the air cavity is significant. In some embodiments, the connector body 1 is made of expanded polyethylene (EPP), which, compared to existing adapters made of sheet metal, offers better insulation, reduces the likelihood of condensation, and decreases the possibility of condensation seeping into the main unit 30. Furthermore, it is lightweight and environmentally friendly. Specifically, the color of the EPP can be adjusted to match the color of the air source heat exchange equipment to achieve concealed installation. For example, if the air outlet 3012 and air inlet 3011 of the main unit 30 are located on a black shroud 301, then the connector body 1 is made of black EPP.

[0054] Obviously, when the inner tube 201 exits the connector body 1 through an outlet 13 other than the first outlet 13a, the inner tube 201 is not a straight tube. Based on this, to reduce the difficulty of assembling the inner tube 201 into the connector body 1, the connector body 1 is divided into two parts. The connector body 1 includes an upper shell 11 and a lower shell 12. The first vent 122 and the second vent 123 are both located on the lower shell 12, the first outlet 13a is located on the upper shell 11, and the second outlet 13b is formed by the upper shell 11 and the lower shell 12. Specifically, the upper shell 11 has multiple upper enclosure portions 111, and the lower shell 12 has multiple lower enclosure portions 121 corresponding to the upper enclosure portions 111. Each upper enclosure portion 111 and its corresponding lower enclosure portion 121 form an outlet 13. Clearly, the divided connector body 1 allows for separate transportation of the upper shell 11 and the lower shell 12, occupying less space and thus reducing transportation costs.

[0055] Based on the configuration of the first insertion portion 14, the first insertion portion 14 at the second through-hole 13b is also formed by the upper shell 11 and the lower shell 12. Specifically, an upper flange 112 is provided on the end face of the upper enclosure 111, and a lower flange 124 is provided on the end face of the lower enclosure 121. The upper flange 112 and the lower flange 124 together form the first insertion portion 14. It can be understood that the end cap 2, in addition to sealing the through-hole 13, also restricts the separation of the upper shell 11 and the lower shell 12.

[0056] It is worth emphasizing that when the inner tube 201 includes a straight section 2012 and a bent section 2011, the bent section 2011 is usually fitted onto the straight section 2012, which results in the outer diameter of the bent section 2011 being slightly larger than the outer diameter of the straight section 2012. Based on this, refer to... Figure 7 As shown, the limiting step 127 is divided into a first limiting step 127a and a second limiting step 127b. The first limiting step 127a is located on the side of the second limiting step 127b near the outlet 13. Both the first limiting step 127a and the second limiting step 127b are annular. The inner diameter of the first limiting step 127a is larger than the inner diameter of the second limiting step 127b.

[0057] To facilitate the distinction between the first vent 122 and the second vent 123, markings are provided on both the inside and outside of the lower housing 12 at the locations of the first vent 122 and the second vent 123. For example, in some embodiments, the second vent 123 is marked with "in" to indicate that it is connected to the air inlet 3011, and the first vent 122 is marked with "out" to indicate that it is connected to the air outlet 3012.

[0058] When the duct assembly 20 is assembled onto the main unit 30, the inner tube 201 is first assembled onto the first ventilation opening 122 on the lower housing 12. Then, the upper housing 11 is connected to the lower housing 12, allowing the inner tube 201 to exit from one of the through-holes 13. Finally, the end cap 2 is used to block the other through-holes 13. Finally, the outer tube 202 is connected to the through-hole 13 from which the inner tube 201 exits. At this time, outdoor air is introduced into the air chamber through the first ventilation channel 203, and then flows to the main unit 30 through the second ventilation opening 123. After heat exchange in the main unit 30, the air becomes air that enters the inner tube 201 through the first ventilation opening 122 and is discharged outdoors through the second ventilation channel 204.

[0059] The upper housing 11 and the lower housing 12 can be fixedly connected by means other than bolts. For example, in order to reduce the difficulty of connecting the upper housing 11 and the lower housing 12, one of the upper housing 11 and the lower housing 12 is provided with a connecting recess 125 and the other is provided with a connecting protrusion 113. The connecting protrusion 113 can be inserted into the connecting recess 125. Based on the expansion property of EPP, the upper housing 11 and the lower housing 12 are interference fit.

[0060] refer to Figure 6 and Figure 7 As shown, in some embodiments, the connecting protrusion 113 is disposed on the upper housing 11 and extends along the outer edge of the upper housing 11, and the connecting recess 125 is disposed on the lower housing 12 and extends along the outer edge of the lower housing 12.

[0061] To further improve connection stability, a second plug-in portion 114 is also provided on the connecting protrusion 113, protruding upward. Multiple second plug-in portions 114 are spaced apart on the connecting protrusion 113. Specifically, the second plug-in portion 114 is cylindrical.

[0062] In other embodiments, the connector body 1 can also be integrally formed, in which case the bent part 2011 of the inner tube 201 can be made of a flexible tube such as a corrugated pipe.

[0063] In order to achieve a stable connection between the duct connector 10 and the hood 301, a third insertion part 3013 is provided around the air inlet 3011 on the top of the hood 301, and a fourth insertion part 3014 is provided around the air outlet 3012. A first protrusion 128 is inserted into the third insertion part 3013, and a second protrusion 129 is inserted into the fourth insertion part 3014.

[0064] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0065] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A duct connector, characterized in that, include: The connector body (1) has an air cavity inside. The connector body (1) is also provided with a first ventilation port (122), a second ventilation port (123) and a through-hole (13) that connect to the air cavity. The inner diameter of the through-hole (13) is larger than the inner diameter of the first ventilation port (122).

2. The duct connector according to claim 1, characterized in that, There are at least two outlets (13), and the directions of the different outlets (13) are different. The duct connector also includes a cap (2), which is selectively assembled to any of the outlets (13).

3. The duct connector according to claim 1, characterized in that, The first vent (122) and the second vent (123) are located at the bottom of the connector body (1). The through-hole (13) includes a first through-hole (13a), which is located at the top of the connector body (1) and coaxially arranged with the first vent (122).

4. The duct connector according to any one of claims 1-3, characterized in that, The first vent (122) and the second vent (123) are located at the bottom of the connector body (1). The through-hole (13) includes a second through-hole (13b) located on the side of the connector body (1). The axis of the second through-hole (13b) and the axis of the first vent (122) are located in the same vertical plane.

5. The duct connector according to claim 4, characterized in that, The connector body (1) includes an upper shell (11) and a lower shell (12). The first vent (122) and the second vent (123) are both disposed on the lower shell (12). The second through-hole (13b) is formed by the upper shell (11) and the lower shell (12).

6. The duct connector according to claim 5, characterized in that, One of the upper housing (11) and the lower housing (12) is provided with a connecting recess (125), and the other of the upper housing (11) and the lower housing (12) is provided with a connecting protrusion (113). The upper housing (11) is connected to the lower housing (12) through the mutually cooperating connecting protrusion (113) and connecting recess (125).

7. The duct connector according to claim 6, characterized in that, The connecting protrusion (113) is further provided with a second plug-in portion (114), and a plurality of second plug-in portions (114) are spaced apart on the connecting protrusion (113).

8. The duct connector according to any one of claims 1-3, characterized in that, A limiting step (127) is formed on the inner wall of the first vent (122); and / or, the second vent (123) is configured as a funnel shape with an inner diameter that gradually increases from one end connected to the air cavity to the other end.

9. The duct connector according to any one of claims 1-3, characterized in that, The connector body (1) has a protruding annular first insertion part (14) that is coaxial with the through-hole (13).

10. A heat pump water heater, characterized in that, The system includes a main unit (30), a duct assembly (20), and a duct connector (10) as described in any one of claims 1-9. The main unit (30) has an air inlet (3011) and an air outlet (3012). The duct connector (10) is connected to the main unit (30) and is connected to the air inlet (3011) and the air outlet (3012) through a first ventilation port (122) and a second ventilation port (123), respectively. The duct assembly (20) includes an inner tube (201) and an outer tube (202). One end of the inner tube (201) passes through the first ventilation port (122), and the other end of the inner tube (201) passes through any one of the outlet ports (13). The outer tube (202) is sleeved on the inner tube (201) and fixed to the outlet port (13). A first ventilation channel (203) is formed between the inner tube (201) and the outer tube (202).

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