Heat pump water heater

Abstract

The utility model discloses a heat pump water heater, and relates to the technical field of household appliances. The heat pump water heater comprises a shell and a centrifugal fan, wherein the peripheral wall of the upper end of the shell is arranged in a semi-opening shape and forms an upper half shell. The centrifugal fan comprises a volute, the volute comprises a first volute and a second volute, and the first volute and the second volute are connected in a buckled mode to form an air outlet. The first volute is in butt joint with the upper half shell, and the second volute is located between the first volute and the upper half shell. And an air suction opening is formed in the second volute. According to the heat-pump water heater, the volute and the shell are integrated, so that the heat-pump water heater is more compact in structure and smaller in size; and meanwhile, the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a heat pump water heater. Background Technology

[0002] Due to space constraints, miniaturization is a future trend for household heat pump water heaters. To achieve this miniaturization, the internal structure of heat pump water heaters is becoming increasingly compact.

[0003] Heat pump water heaters include a centrifugal fan, which comprises a volute, a motor, and an impeller. The impeller rotates within the volute, while the motor, located outside the volute, drives its rotation. To reduce costs and the size of the centrifugal fan, the motor is housed within the volute, minimizing manufacturing costs associated with adding a support bracket to secure the motor and effectively reducing the fan's overall size. However, even with the centrifugal fan installed inside the heat pump water heater's casing, a significant gap remains between the volute and the outer shell, resulting in a less compact design and a relatively high cost. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a heat pump water heater that can effectively solve the problem of large size and high cost of heat pump water heaters caused by the large gap between the volute and the outer shell of the centrifugal fan; and to further reduce the size and cost of heat pump water heaters.

[0005] The above-mentioned technical problems are solved by the following technical solutions:

[0006] Heat pump water heaters include:

[0007] The outer shell has a semi-open peripheral wall at its upper end, forming an upper half shell;

[0008] A centrifugal fan includes a volute, which comprises a first volute and a second volute, which are fastened together to form an exhaust port; the first volute is connected to the upper shell, and the second volute is located between the first volute and the upper shell, and an intake port is provided on the second volute.

[0009] The heat pump water heater described in this utility model has the following advantages compared with the prior art:

[0010] This utility model provides a heat pump water heater, including a shell and a centrifugal fan. The upper peripheral wall of the shell is semi-open, forming an upper half-shell. The centrifugal fan's volute is formed by a first volute and a second volute connected together to form an exhaust port. An intake port is provided on the second volute, allowing a complete air duct to be formed inside the volute. The first volute is connected to the upper half-shell, and the second volute is located between the first volute and the upper half-shell. This arrangement, using the first volute as part of the shell, not only solves the problem of the large size of heat pump water heaters caused by the gap between the volute and the shell in the prior art, but also saves on the cost of the shell, thereby reducing the cost of the heat pump water heater. This heat pump water heater integrates the volute and the shell, making the structure of the heat pump water heater more compact and smaller in size, while also reducing manufacturing costs.

[0011] In one embodiment, the centrifugal fan further includes a motor, and a closed cavity is provided inside the volute, with the motor located inside the closed cavity.

[0012] In one embodiment, the centrifugal fan further includes a motor mounting bracket, and the first volute and the motor mounting bracket cooperate to form the enclosed cavity.

[0013] In one embodiment, the inner wall of the first volute is provided with a mounting platform, the mounting platform is provided with the mounting groove, the motor mounting bracket is provided with a receiving groove, and the receiving groove and the mounting groove cooperate to form the closed cavity.

[0014] In one embodiment, the motor mounting bracket is installed within the mounting groove.

[0015] In one embodiment, the motor is provided with connecting protrusions spaced apart circumferentially, and the receiving groove is provided with connecting grooves spaced apart circumferentially, wherein the connecting protrusions and the connecting grooves are connected in a mating manner.

[0016] In one embodiment, the centrifugal fan further includes a fan wheel, which is fixedly connected to the shaft of the motor. A first cavity is provided on the first volute, and a mounting groove is provided at the bottom of the first cavity. A second cavity is provided on the second volute, and an air inlet is provided at the bottom of the second cavity. The first cavity and the second cavity cooperate to form a receiving cavity, and the fan wheel is located in the receiving cavity.

[0017] In one embodiment, the first volute has a first semi-circular hole at one end facing the outer shell, and the first semi-circular hole communicates with the first cavity; the second volute has a second semi-circular hole at one end facing the outer shell, and the second semi-circular hole communicates with the second cavity, and the first semi-circular hole and the second semi-circular hole cooperate to form the exhaust port.

[0018] In one embodiment, the heat pump water heater further includes an evaporator disposed inside the outer casing and located on one side of the second volute, with the air intake arranged opposite to the evaporator.

[0019] In one embodiment, the heat pump water heater further includes a top cover for sealing the end of the outer casing near the centrifugal fan. The top cover is provided with an air inlet and an air outlet, and the exhaust port is connected to the air outlet. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the hidden top cover of the heat pump water heater provided in a specific embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the hidden top cover and the first volute of the heat pump water heater provided in a specific embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the hidden upper shell structure of the heat pump water heater provided in a specific embodiment of this utility model;

[0024] Figure 4 This is a structural schematic diagram of the centrifugal fan provided in a specific embodiment of the present invention;

[0025] Figure 5 This is an exploded view of the centrifugal fan provided in a specific embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the first volute provided in a specific embodiment of this utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the first volute housing and the motor mounting bracket forming a closed cavity according to a specific embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the first structure of the motor mounting bracket provided in a specific embodiment of this utility model;

[0029] Figure 9 This is a schematic diagram of the second structure of the motor mounting bracket provided in a specific embodiment of this utility model;

[0030] Figure 10 This is a structural schematic diagram of a heat pump water heater provided in a specific embodiment of this utility model.

[0031] Label Explanation:

[0032] 100. Evaporator;

[0033] 1. Outer shell; 11. Upper shell; 12. Lower shell;

[0034] 2. Centrifugal fan; 21. First volute; 211. Mounting platform; 2111. Mounting groove; 2112. First cavity; 2113. First semi-circular hole; 22. Second volute; 221. Second cavity; 222. Air inlet; 223. Second semi-circular hole; 23. Motor; 231. Connecting protrusion; 2311. Threaded hole; 24. Impeller; 25. Motor mounting bracket; 251. Connecting outer edge; 252. Central protrusion; 2521. Accommodating groove; 2522. Connecting groove; 2523. Clearance part; 2524. Through hole; 2525. Connecting hole; 26. Exhaust port; 27. Enclosed cavity; 31. Top cover; 311. Air inlet; 312. Air outlet; 32. Bottom cover. Detailed Implementation

[0035] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] like Figures 1-4 As shown, this embodiment provides a heat pump water heater including a casing 1, a centrifugal fan 2, and an evaporator 100. The evaporator 100 is disposed inside the casing 1, and the centrifugal fan 2 is used for ventilation and heat exchange of the evaporator 100 during use. The centrifugal fan 2 includes a volute, a motor 23, and a fan wheel 24. The fan wheel 24 is fixedly connected to the shaft of the motor 23, and the motor 23 drives the fan wheel 24 to rotate.

[0038] The upper peripheral wall of the outer casing 1 is semi-open to form an upper half-shell 11. The volute includes a first volute 21 and a second volute 22, which are fastened together to form an exhaust port 26 facing the end of the outer casing 1. The first volute 21 is connected to the upper half-shell 11, and the second volute 22 is located between the first volute 21 and the upper half-shell 11. The second volute 22 is provided with an air intake 222, which faces the inside of the outer casing 1. The evaporator 100 is located on one side of the second volute 22, and the air intake 222 is opposite to the evaporator 100. This allows the motor 23 to drive the impeller 24 to rotate, so that the heat generated by the evaporator 100 is drawn into the volute through the air intake 222 and discharged from the volute through the exhaust port 26. The first volute 21 is connected to the upper shell 11, and the second volute 22 is located between the first volute 21 and the upper shell 11. This arrangement, where the first volute 21 acts as part of the outer shell 1, not only solves the problem of the large size of heat pump water heaters caused by the gap between the volute and the outer shell 1 in the prior art, but also saves on the cost of the outer shell 1, thereby reducing the cost of the heat pump water heater. This heat pump water heater integrates the volute and the outer shell 1, making the structure more compact and the size smaller, while also reducing manufacturing costs.

[0039] Specifically, the outer shell 1 includes an upper shell and a lower shell 12. The lower shell 12 is a cylindrical structure, and the upper shell includes an upper half shell 11, which is joined with a first volute 21 to form the upper shell. One end of the lower shell 12 has a first snap-fit ​​structure, and both ends of the upper half shell 11 and the first volute 21 have second snap-fit ​​structures. The first and second snap-fit ​​structures cooperate to snap-fit ​​the upper half shell 11 and the first volute 21 to the lower shell 12. During installation, the upper half shell 11 is first snapped onto the lower shell 12, and then the first volute 21 of the centrifugal fan 2 is aligned with the upper half shell 11 and snapped onto the lower shell 12. Of the first and second snap-fit ​​structures, one is a slot and the other is a protrusion; the protrusion engages with the slot for snap-fit.

[0040] In one embodiment, such as Figures 5-9 As shown, a closed cavity 27 is provided inside the volute, and the motor 23 is located inside the closed cavity 27. Specifically, the centrifugal fan 2 also includes a motor mounting bracket 25, and the first volute 21 and the motor mounting bracket 25 cooperate to form the closed cavity 27. By placing the motor 23 inside the closed cavity 27, compared to the prior art where the motor 23 is installed in a semi-enclosed structure inside the volute, with the other half of the motor 23 exposed outside, and the noise generated during operation is transmitted through the air duct inside the volute, this embodiment places the motor 23 inside the closed cavity 27, which can shield the noise of the motor 23; reduce the noise of the heat pump water heater; and thus avoid disturbing the user with noise, improving the user experience.

[0041] In one embodiment, the inner wall of the first volute 21 is provided with a mounting platform 211, and a mounting groove 2111 is provided on the mounting platform 211. The motor mounting bracket 25 is provided with a receiving groove 2521. The receiving groove 2521 and the mounting groove 2111 cooperate to form a closed cavity 27. Both the mounting platform 211 and the motor mounting bracket 25 have a certain thickness. By providing the mounting groove 2111 on the mounting platform 211 and the receiving groove 2521 on the motor mounting bracket 25, the receiving groove 2521 and the mounting groove 2111 are arranged opposite to each other to form a closed cavity 27. The motor 23 is installed in the closed cavity 27. The periphery of the closed cavity 27 has a certain thickness to better shield noise.

[0042] Of course, in other embodiments, a receiving groove may also be provided in the second volute 22, and the receiving groove and the mounting groove 2111 may cooperate to form a closed cavity 27.

[0043] Since the shapes and sizes of motors 23 from different suppliers vary, the sizes of the corresponding enclosed cavities 27 also differ. To prevent the mounting groove 2111 on the first volute 21 from becoming incompatible after replacing the motor 23, a motor mounting bracket 25 is installed within the mounting groove 2111. Specifically, the outer periphery of the motor mounting bracket 25 is fitted to the peripheral wall of the mounting groove 2111, and the receiving groove 2521 fits with the bottom of the mounting groove 2111 to form the enclosed cavity 27. With this configuration, for motors 23 of different shapes and sizes, only the motor mounting bracket 25 needs to be replaced, changing the shape and size of the receiving groove 2521 within the motor mounting bracket 25; without altering the structure of the first volute 21, resulting in better versatility.

[0044] In one embodiment, the motor 23 is provided with connecting protrusions 231 spaced circumferentially, and the receiving groove 2521 is provided with connecting grooves 2522 spaced circumferentially. The connecting protrusions 231 and the connecting grooves 2522 are connected in cooperation. Multiple connecting protrusions 231 and connecting grooves 2522 are provided in a one-to-one correspondence. When installing the motor 23, multiple connecting protrusions 231 are positioned one-to-one with multiple connecting grooves 2522, and the motor 23 is placed in the receiving groove 2521. The bottom of the receiving groove 2521 is also provided with a through hole 2524, through which the shaft of the motor 23 passes and connects to the impeller 24. The arrangement of the connecting protrusions 231 and connecting grooves 2522 achieves both the positioning of the motor 23 and the connection between the motor 23 and the motor mounting bracket 25. The connecting protrusion 231 is provided with a threaded hole 2311, and the connecting groove 2522 is provided with a connecting hole 2525. The connecting screw passes through the connecting hole 2525 and is screwed into the threaded hole 2311, thereby fixing the motor 23.

[0045] Furthermore, the motor mounting bracket 25 includes a connecting outer edge 251 and a central protrusion 252. The connecting outer edge 251 is interference-fitted with the side wall of the mounting groove 2111. The accommodating groove 2521 is provided within the central protrusion 252. A clearance portion 2523 is provided at the connection point between the central protrusion 252 and the connecting outer edge 251, corresponding to the connecting hole 2525, to avoid the connecting screws connecting the connecting protrusion 231 and the connecting groove 2522.

[0046] In one embodiment, a first cavity 2112 is provided on the first volute 21, and a mounting groove 2111 is provided at the bottom of the first cavity 2112. A second cavity 221 is provided on the second volute 22, and an air intake 222 is provided at the bottom of the second cavity 221. The first cavity 2112 and the second cavity 221 cooperate to form a receiving cavity, and the impeller 24 is disposed in the receiving cavity. After the first volute 21 and the second volute 22 are connected, a receiving cavity for placing the impeller 24 is formed.

[0047] When installing the centrifugal fan 2, first place the motor 23 in the receiving groove 2521, so that the connecting protrusion 231 corresponds one-to-one with the connecting groove 2522. The shaft of the motor 23 passes through the through hole 2524. Use connecting screws to pass through the clearance part 2523 and the connecting hole 2525 and screw them into the threaded hole 2311 on the connecting protrusion 231 to fix the motor 23 on the motor mounting bracket 25. Then connect the shaft of the motor 23 to the impeller 24, and then connect the motor mounting bracket 25 to the mounting groove 2111. Finally, fasten the first volute 21 and the second volute 22 together, and place the impeller 24 in the receiving cavity to complete the assembly of the centrifugal fan 2.

[0048] In one embodiment, a first semi-circular hole 2113 is provided at one end of the first volute 21 facing the outer shell 1, and the first semi-circular hole 2113 communicates with the first recess 2112; a second semi-circular hole 223 is provided at one end of the second volute 22 facing the outer shell 1, and the second semi-circular hole 223 communicates with the second recess 221. The first semi-circular hole 2113 and the second semi-circular hole 223 cooperate to form an exhaust port 26. After the first volute 21 and the second volute 22 are fastened together, an exhaust port 26 is formed. The exhaust port 26 communicates with the receiving cavity. The centrifugal fan 2 draws the heat generated by the evaporator 100 into the receiving cavity from the suction port 222, and then discharges it through the exhaust port 26.

[0049] In one embodiment, such as Figure 10As shown, the heat pump water heater also includes end caps, which are located at the ends of the outer casing 1. Both ends of the outer casing 1 are open, facilitating the installation of components inside the casing 1. After the components are installed, the end caps close the ends of the outer casing 1, thus sealing it. The end cap located near the centrifugal fan 2 is a top cover 31, which has an air inlet 311 and an air outlet 312. The exhaust port 26 is connected to the air outlet 312. The end cap located away from the centrifugal fan 2 is a bottom cover 32. The top cover 31 closes the top of the outer casing 1, and the bottom cover 32 closes the bottom. The exhaust port 26 of the centrifugal fan 2 is aligned with the air outlet 312, allowing heat from the centrifugal fan 2 to be discharged from the centrifugal fan 2 through the exhaust port 26 and then from the air outlet 312 out of the outer casing 1.

[0050] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A heat pump water heater, characterized in that, include: The outer shell (1) has a semi-open peripheral wall at the upper end, forming an upper half shell (11); Centrifugal fan (2) includes a volute, the volute including a first volute (21) and a second volute (22), the first volute (21) and the second volute (22) are fastened together to form an exhaust port (26); the first volute (21) is connected to the upper half shell (11), the second volute (22) is located between the first volute (21) and the upper half shell (11), and an air intake port (222) is provided on the second volute (22).

2. The heat pump water heater according to claim 1, characterized in that, The centrifugal fan (2) also includes a motor (23), and a closed cavity (27) is provided inside the volute, with the motor (23) located inside the closed cavity (27).

3. The heat pump water heater according to claim 2, characterized in that, The centrifugal fan (2) also includes a motor mounting bracket (25), and the first volute (21) and the motor mounting bracket (25) cooperate to form the enclosed cavity (27).

4. The heat pump water heater according to claim 3, characterized in that, The inner wall of the first volute (21) is provided with a mounting platform (211), the mounting platform (211) is provided with a mounting groove (2111), the motor mounting bracket (25) is provided with a receiving groove (2521), and the receiving groove (2521) and the mounting groove (2111) cooperate to form the closed cavity (27).

5. The heat pump water heater according to claim 4, characterized in that, The motor mounting bracket (25) is installed in the mounting groove (2111).

6. The heat pump water heater according to claim 4, characterized in that, The motor (23) is provided with connecting protrusions (231) at circumferential intervals, and the receiving groove (2521) is provided with connecting grooves (2522) at circumferential intervals. The connecting protrusions (231) and the connecting grooves (2522) are connected in cooperation.

7. The heat pump water heater according to claim 4, characterized in that, The centrifugal fan (2) also includes a fan wheel (24), which is fixedly connected to the shaft of the motor (23). A first cavity (2112) is provided on the first volute (21), and the mounting groove (2111) is provided at the bottom of the first cavity (2112). A second cavity (221) is provided on the second volute (22), and the air inlet (222) is provided at the bottom of the second cavity (221). The first cavity (2112) and the second cavity (221) cooperate to form a receiving cavity, and the fan wheel (24) is located in the receiving cavity.

8. The heat pump water heater according to claim 7, characterized in that, The first volute (21) has a first semi-circular hole (2113) at one end facing the outer shell (1), and the first semi-circular hole (2113) communicates with the first cavity (2112); the second volute (22) has a second semi-circular hole (223) at one end facing the outer shell (1), and the second semi-circular hole (223) communicates with the second cavity (221). The first semi-circular hole (2113) and the second semi-circular hole (223) cooperate to form the exhaust port (26).

9. The heat pump water heater according to any one of claims 1-8, characterized in that, The heat pump water heater also includes an evaporator (100), which is located inside the outer casing (1) and on one side of the second volute (22). The air intake (222) is arranged opposite to the evaporator (100).

10. The heat pump water heater according to claim 9, characterized in that, The heat pump water heater also includes a top cover (31), which is used to close the end of the outer shell (1) near the centrifugal fan (2). The top cover (31) is provided with an air inlet (311) and an air outlet (312), and the exhaust port (26) is connected to the air outlet (312).

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