Spraying device for dish washing machine

Abstract

The utility model provides a spraying device for a dish-washing machine, which comprises a shell, a spraying device, a spraying device, a spraying device and a control device, and is characterized in that the shell is provided with a liquid inlet chamber and a paddle wheel chamber downstream the liquid inlet chamber; the paddle wheel is arranged in the paddle wheel chamber; and the pressure relief assembly is arranged near a hydraulic pressure rising area between the liquid inlet chamber and the paddle wheel chamber, so that liquid at or near the hydraulic pressure rising area is released to another area in the shell. The utility model provides a spraying device for a dish-washing machine, which effectively solves the problem that a paddle wheel and a transmission mechanism thereof are damaged due to overlarge hydraulic pressure in the spraying device in the prior art, and also can avoid liquid waste. In addition, the structure of the spraying device is simplified and miniaturized through the optimal design of a spraying pipe transmission mechanism.

Description

Technical Field

[0001] This utility model relates to a spray device for a dishwasher. Background Technology

[0002] Dishwashers are commonly used in households and include a spray device for spraying liquids.

[0003] A common type of spray system uses liquid to drive a paddle wheel and a gear transmission mechanism connected to the paddle wheel, which in turn drives the spray pipe to rotate, thus distributing the liquid evenly within the dishwasher. However, when the hydraulic pressure is high at the liquid inlet area, the paddle wheel experiences excessive pressure, causing it to rotate too quickly. This can easily damage the paddle wheel and the related gear transmission mechanism, affecting its normal operation. Furthermore, unstable hydraulic pressure within the spray system can also lead to problems such as unstable spray pressure and flow rate.

[0004] Another type of spray system does not include a paddle wheel and a rotatable spray pipe. However, when faced with excessively high hydraulic pressure, problems such as component damage or unstable spray pressure and flow rate can occur. Although some of these spray systems include pressure relief components, liquid is discharged outside the spray system during pressure relief, resulting in waste. Some also require liquid recovery devices, complicating the dishwasher's structure and increasing costs.

[0005] Therefore, there is a need in the art for a spraying device to avoid or solve the above-mentioned problems. Utility Model Content

[0006] In response to the problems and needs mentioned above, this disclosure proposes a novel technical solution that solves the aforementioned problems and brings about other technical effects by adopting the following technical features.

[0007] This utility model provides a spray device for a dishwasher, comprising: a housing having a liquid inlet chamber and a impeller chamber downstream of the liquid inlet chamber; an impeller disposed in the impeller chamber; and a pressure relief assembly disposed near a hydraulic rise area between the liquid inlet chamber and the impeller chamber, so as to release liquid at or near the hydraulic rise area into another area inside the housing.

[0008] Preferably, the housing includes a partition wall that separates the liquid inlet chamber and the impeller chamber from the other region, and the partition wall includes a pressure relief port, and the pressure relief assembly is configured to open or close the pressure relief port.

[0009] Preferably, the pressure relief assembly includes a baffle for opening and closing the pressure relief port and a spring interacting with the baffle, wherein the spring applies a biasing force to the baffle toward the pressure relief port.

[0010] Preferably, when the hydraulic pressure in the hydraulic rise zone is less than a threshold pressure, the spring keeps the baffle closed at the pressure relief port; when the hydraulic pressure in the hydraulic rise zone is greater than the threshold pressure, the liquid pushes the baffle away from the pressure relief port to overcome the bias force of the spring, so that the liquid is released into the other zone.

[0011] Preferably, one end of the baffle includes a first pivot, which is pivotally disposed in the housing.

[0012] Preferably, the side of the baffle opposite to the pressure relief port includes a protrusion, one end of the spring is disposed on the protrusion, and the housing also includes a spring seat, the other end of the spring is disposed in the spring seat.

[0013] Preferably, the spring seat is connected to the partition wall via a connecting wall.

[0014] Preferably, the pressure relief component is configured as a flexible baffle, one end of which is fixed to the housing near the pressure relief port, and the other end can move freely; when the hydraulic pressure in the hydraulic rise area is less than a threshold pressure, the flexible baffle keeps the pressure relief port closed; when the hydraulic pressure in the hydraulic rise area is greater than the threshold pressure, the liquid pushes the flexible baffle to deflect through the pressure relief port, so that the liquid is released into the other area.

[0015] Preferably, the spraying device includes a first flow channel and a second flow channel branching downstream from the impeller chamber, wherein: the end of the first flow channel has a first liquid outlet; the second flow channel is defined by the partition wall and the end of the second flow channel has a second liquid outlet, and the second flow channel is the other area.

[0016] Preferably, the housing further includes a pivot hole, in which a second pivot of the impeller is pivotally disposed, and the second pivot has a drive portion extending into a transmission chamber of the housing, the transmission chamber being located on the side of the housing opposite to the inlet chamber and the impeller chamber; the spraying device further includes: a first output member having a first hollow pivot portion and a first driven portion, the first hollow pivot portion being pivotally disposed in a first outlet, and the first driven portion being disposed on the portion of the first hollow pivot portion extending into the transmission chamber; a first spray pipe being fixedly connected to and in fluid communication with the first hollow pivot portion; wherein, the drive portion of the impeller is rotatably connected to the first driven portion, so that the rotation of the impeller will drive the first output member and the first spray pipe to rotate together.

[0017] Preferably, the spraying device further includes: a second output component having a second hollow pivot portion and a second driven portion, the second hollow pivot portion being pivotally disposed in a second liquid outlet, and the second driven portion being disposed on the portion of the second hollow pivot portion extending into the transmission chamber; a second spray pipe being fixedly connected to and in fluid communication with the second hollow pivot portion; wherein, the driving portion of the impeller is rotatably connected to the second driven portion, so that the rotation of the impeller will drive the second output component and the second spray pipe to rotate together.

[0018] Preferably, the driving part of the impeller is formed as a driving gear, the first driven part is formed as a first gear, and the second driven part is formed as a second gear, and the driving gear is connected to the first gear through the first transmission gear, and the driving gear is connected to the second gear through the second transmission gear.

[0019] Preferably, the rotation centers of the paddle wheel, the first gear of the first output component, the second gear of the second output component, the first transmission gear, and the second transmission gear are located on a straight line.

[0020] Preferably, the first spray pipe has at least one first guide groove extending longitudinally therein, and the first hollow pivot portion of the first output member has at least one first guide rib that can be inserted into the at least one first guide groove; and / or the first spray pipe has at least one first limiting groove distributed circumferentially therein, and the first hollow pivot portion of the first output member has at least one first limiting portion that can fall into the at least one first limiting groove.

[0021] Preferably, the second spray pipe has at least one second guide groove extending longitudinally therein, and the second hollow pivot portion of the second output member has at least one second guide rib that can be inserted into the at least one second guide groove; and / or the second spray pipe has at least one second limiting groove distributed circumferentially therein, and the second hollow pivot portion of the second output member has at least one second limiting portion that can fall into the at least one second limiting groove.

[0022] This invention provides a spray device for a dishwasher, which effectively solves the problem of damage to the impeller and its transmission mechanism caused by excessive hydraulic pressure in the spray device in the prior art, while also avoiding liquid waste. Furthermore, this invention simplifies and miniaturizes the structure of the spray device through optimized design of the spray pipe transmission mechanism. Attached Figure Description

[0023] Figure 1 This is an exploded view of the spraying device according to a preferred embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a pressure relief component in a spray device according to a preferred embodiment of the present invention is shown;

[0025] Figure 3A A schematic diagram showing the opening and closing of the pressure relief component in the spray device according to a preferred embodiment of the present invention is shown.

[0026] Figure 3B A schematic diagram of the baffle of the pressure relief assembly in the spray device according to a preferred embodiment of the present invention is shown;

[0027] Figure 4A schematic diagram of a spring seat in a spray device according to a preferred embodiment of the present invention is shown in perspective and enlarged view.

[0028] Figure 5 A schematic diagram of a dual-channel spray device according to a preferred embodiment of the present invention is shown;

[0029] Figure 6 A schematic diagram of a paddle wheel in a spray device according to a preferred embodiment of the present invention is shown;

[0030] Figure 7 A schematic diagram of the gear transmission structure in the spray device according to a preferred embodiment of the present invention is shown;

[0031] Figure 8 A schematic diagram of a spray pipe in a spray device according to a preferred embodiment of the present invention is shown;

[0032] Figure 9 A schematic diagram of the first output member and the connection structure between the output member and the spray pipe in the spray device according to a preferred embodiment of the present invention is shown. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0034] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this disclosure may have fewer components, other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0035] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Where the number of components is not specified, the number of components may be one or more; similarly, terms such as “a,” “the,” and “described” do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “install,” “set,” “connect,” or “link” are not limited to physical or mechanical installation, setting, or connection, but may include electrical installation, setting, or connection, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate the relative positional relationship of the equipment during use or as shown in the accompanying drawings; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0037] Referring to the accompanying drawings, a spray device for a dishwasher according to the present invention includes: a housing 1, a paddle wheel 2, a related gear transmission mechanism (described below), spray pipes 51 and 52, a front cover 8, and a rear cover 9. The front cover 8 can be snapped into place from the front of the housing 1, and the rear cover 9 can be snapped into place from the back of the housing 1 to assemble the spray device.

[0038] Furthermore, the housing 1 has a liquid inlet chamber 18 and a impeller chamber 19 downstream of the liquid inlet chamber 18. The liquid inlet 80 of the spray device can be provided on the front cover 8 to introduce liquid into the liquid inlet chamber 18. The impeller 2 is disposed in the impeller chamber 19.

[0039] The inventors discovered that when the liquid flow rate entering the spray device is large, a hydraulic rise zone is formed between the inlet chamber 18 and the impeller chamber 19. Because this hydraulic rise zone is close to the impeller 2, it exerts excessive pressure on the impeller 2, making it prone to fatigue failure after prolonged use. Furthermore, the high pressure is also transmitted to the transmission mechanism connected to the impeller 2 (e.g., the gear transmission mechanism described later), also posing a risk of damage to the transmission mechanism. In addition, even if the pressure on the impeller 2 is not high, if the liquid pressure entering the inlet chamber 18 frequently fluctuates significantly, it will cause instability in the liquid pressure and flow rate distributed from the spray device, thereby affecting the working efficiency of the spray device.

[0040] Therefore, this invention proposes to install a pressure relief component near the hydraulic rise area between the inlet chamber 18 and the impeller chamber 19, so that the liquid at or near the hydraulic rise area is released into another area inside the housing 1. It can be understood that this other area is any other suitable area outside the inlet chamber 18 and the impeller chamber 19 but inside the housing 1, such as the second flow channel described later, or other dedicated areas in the housing 1 specifically for buffering or temporarily storing liquid. Through this invention, the hydraulic pressure in the spraying device can be regulated in a simple and effective manner, not only avoiding excessive pressure at the impeller 2, but also stabilizing the internal hydraulic pressure during the operation of the spraying device, thus extending the lifespan and improving the working efficiency of the spraying device. Furthermore, the pressure relief port in this invention does not release the liquid to the outside of the spraying device as in the prior art, but rather releases the liquid to another area inside the housing 1, thus avoiding liquid waste and eliminating the need for additional liquid recovery devices.

[0041] According to a preferred embodiment of the present invention, the housing 1 may include a partition wall 10 that separates the liquid inlet chamber 18 and the impeller chamber 19 from the other region. In other words, by providing the partition wall 10, another region separate from the liquid inlet chamber 18 and the impeller chamber 19 is defined in the housing 1. Thus, by providing a pressure relief port 101 on the partition wall 10 and configuring the pressure relief assembly to open or close the pressure relief port 101, liquid can be released to the other region through the pressure relief port 101 when a large hydraulic pressure occurs in the hydraulic rise region.

[0042] More preferably, see Figure 2-3B The pressure relief assembly may include a baffle 31 for opening and closing the pressure relief port 101 and a spring 32 that interacts with the baffle 31, wherein the spring 32 applies a biasing force to the baffle 31 toward the pressure relief port 101.

[0043] With this configuration, under normal operating conditions of the spray device, the baffle 31 remains closed to the pressure relief port 101 under the action of the spring 32, such as... Figure 3A As shown, in other words, when the hydraulic pressure in the hydraulic rise zone is less than a threshold pressure, the spring 32 keeps the baffle 31 closed at the pressure relief port 101; while when the hydraulic pressure in the hydraulic rise zone is greater than the threshold pressure, the liquid pushes the baffle 31 away from the pressure relief port 101, overcoming the bias force of the spring 32, so that the liquid is released into the other zone. It should be understood that this threshold pressure can be set according to the structure of the spray device, the flow rate requirements of the spray liquid, etc., and therefore a suitable spring 32 can be selected based on the threshold pressure.

[0044] More preferably, one end of the baffle 31 may include a first pivot 33, which is pivotally disposed in the housing 1. Also preferably, the first pivot 33 may be supported, for example, between the housing 1 and the front cover 8; for this purpose, it is only necessary to provide holes on the inner walls of the housing 1 and the front cover 8 for supporting the two ends of the first pivot 33.

[0045] Preferably, the side of the baffle 31 opposite to the pressure relief port 101 includes a protrusion 34, and one end of the spring 32 is disposed on the protrusion 34. Furthermore, as... Figure 4 As shown, the housing 1 may further include a spring seat 35, and the other end of the spring 32 may be disposed in the spring seat 35. More preferably, the spring seat 35 may be connected to the partition wall 10 via a connecting wall 36, thereby strengthening the spring seat 35 and preventing fatigue failure of the spring seat 35 due to prolonged exposure to the force from the spring 32. The spring 32 may be fixed to the protrusion 34 and the spring seat 35, for example, by interference fit or bonding.

[0046] It should also be understood that spring 32 can be any suitable spring. In the preferred embodiment shown in the figures, a cylindrical helical spring is illustrated, but it can also be other forms such as a disc spring. Accordingly, any suitable spring fixing structure can be provided without departing from the scope of this utility model.

[0047] The above provides a preferred embodiment of the pressure relief assembly. After understanding the principle of this invention, those skilled in the art can modify the pressure relief assembly without departing from the scope of this invention.

[0048] For example, the baffle 31 may not be configured to open and close by pivoting, but can move linearly along the longitudinal direction of the spring under the action of the spring 32, which can also serve to open and close the pressure relief port 101.

[0049] For example, according to a preferred embodiment (not shown), the pressure relief assembly is configured as a flexible baffle, one end of which is fixed to the housing 1 near the pressure relief port 101 (e.g., fixed to the partition wall 10 near the pressure relief port 101), and the other end is free to move, so that the flexible baffle can also deflect like the baffle 31 described above. Furthermore, when the hydraulic pressure in the hydraulic rise area is less than a threshold pressure, the flexible baffle keeps the pressure relief port 101 closed; when the hydraulic pressure in the hydraulic rise area is greater than the threshold pressure, the liquid pushes the flexible baffle to deflect through the pressure relief port 101, allowing the liquid to be released into the other area.

[0050] The liquid distribution structure of the spray device is further described below with reference to the accompanying drawings.

[0051] See Figure 5The spraying device may include a first flow channel 11 and a second flow channel 12 branching downstream from the impeller chamber 19. The first flow channel 11 has a first outlet 111 at its end; the second flow channel 12 is defined by the partition wall 10, and has a second outlet 121 at its end. The flow of liquid in the spraying device is as follows: Figure 5 As indicated by the dashed arrow in the diagram. Therefore, due to the presence of partition 10, the second flow channel 12 is the other area. Thus, when the liquid pressure inside the spray device is too high, the liquid released from the pressure relief port 101 will enter the second flow channel 12 and be discharged from the second outlet 121.

[0052] With its dual-channel, dual-outlet configuration, the spray device can connect two spray pipes. More preferably, at least one of these spray pipes can be configured to receive rotational motion from the impeller, so that when the impeller rotates due to the liquid entering the spray device, the spray pipe also rotates, achieving a more uniform liquid distribution inside the dishwasher. See below for further details. Figure 4-8 A detailed description of the structures related to the movement of the spray pipes.

[0053] Specifically, the housing 1 may also include a pivot hole 13, in which a second pivot 23 of the impeller 2 is pivotally disposed, and the second pivot 23 has a drive portion 230 extending into a transmission chamber 17 of the housing 1, the transmission chamber being located on the side of the housing 1 opposite to the liquid inlet chamber 18 and the impeller chamber 19.

[0054] Furthermore, the spraying device may also include a first output member 41 and a first spray pipe 51. The first output member 41 has a first hollow pivot portion 410 pivotally disposed in the first liquid outlet 111, thereby receiving liquid from the first liquid outlet 111. The first output member 41 also has a first driven portion 411 disposed on the portion of the first hollow pivot portion 410 extending into the transmission chamber 17. Since the first driven portion 411 is located in the transmission chamber 17, the first driven portion 411 is isolated from the liquid in the housing 1. Furthermore, the first spray pipe 51 is fixedly connected to and in fluid communication with the first hollow pivot portion 410, so that liquid flows into the first spray pipe 51 through the first output member 41. At the same time, the drive portion 230 of the impeller 2 is rotatably connected to the first driven portion 411, for example, through a suitable transmission method, so that the rotation of the impeller 2 will drive the first output member 41 and the first spray pipe 51 to rotate together. The first spray pipe 51 may also have spray holes spirally distributed along its longitudinal direction, for example.

[0055] Similarly, the spraying device may also include a second output member 42 and a second spray pipe 52. The second output member 42 has a second hollow pivot portion 420 pivotally disposed in the second liquid outlet 121, thereby receiving liquid from the second liquid outlet 121. The second output member 42 also has a second driven portion 421 disposed on the portion of the second hollow pivot portion 420 extending into the drive chamber 17. The second spray pipe 52 is fixedly connected to and in fluid communication with the second hollow pivot portion 420. The drive portion 230 of the impeller 2 is rotatably coupled, for example, to the second driven portion 421, so that rotation of the impeller 2 will drive the second output member 42 and the second spray pipe 52 to rotate together. The second spray pipe 52 may, for example, have spray holes spirally distributed along its longitudinal direction.

[0056] It should be understood that the drive unit 230 may be rotatably connected to the first driven unit 411 and the second driven unit 421, for example, by a transmission belt, transmission chain, one or more transmission gears, etc.

[0057] This utility model provides a preferred embodiment based on the transmission of rotational motion via a transmission gear. For example... Figure 7 As shown, the drive part 230 of the impeller 2 is formed as a drive gear, the first driven part 411 is formed as a first gear, and the drive gear is connected to the first gear through the first transmission gear 91. Similarly, the second driven part 421 is formed as a second gear, and the drive gear is connected to the second gear through the second transmission gear 92. Thus, the impeller 2 drives the output parts 41 and 42 to rotate via its drive gear and transmission gears 91 and 92, thereby driving the spray pipes 51 and 52 to rotate, so as to achieve uniform liquid distribution inside the dishwasher.

[0058] Furthermore, in existing spraying devices that use gear transmission mechanisms to rotate the spray pipes, the gear transmission mechanism typically includes multiple transmission gears, resulting in a complex structure that leads to larger size, higher cost, and higher failure rate of the spraying device.

[0059] Therefore, according to a preferred embodiment of the present invention, the rotation centers of the impeller 2, the first gear of the first output component 41, the second gear of the second output component 42, the first transmission gear 91, and the second transmission gear 92 are located on a straight line, such as... Figure 7 As shown by the dashed line L. This arrangement not only reduces the number of drive gears for each spray pipe to one, but also achieves a more compact layout, simplifies the rotary transmission mechanism from the impeller 2 to the spray pipes 51, 52, and enables the miniaturization of the spraying device.

[0060] It should be understood that the spray pipe and the corresponding output component can be connected in any suitable way, as long as the spray pipe and the corresponding output component can rotate together. For example, they can be connected by welding, bonding, threaded connection, etc.

[0061] Figure 8 and 9 A preferred embodiment is shown, wherein the first spray pipe 51 and the second spray pipe 52 have substantially the same structure, and the first output member 41 and the second output member 42 have substantially the same structure, therefore Figure 8 A portion of a spray pipe is shown in order to describe the first spray pipe 51 and the second spray pipe 52 together. Figure 9 One of the output components is shown from both positive and negative viewing angles in order to describe the first output component 41 and the second output component 42 together.

[0062] Specifically, the first spray pipe 51 may have at least one first guide groove 510 extending longitudinally therein, and the first hollow pivot portion 410 of the first output member 41 has at least one first guide rib 413 that can be inserted into the at least one first guide groove 510. In the illustrated embodiment, three first guide grooves 510 and three first guide ribs 413 are provided. Moreover, since at least one first guide rib 413 has a certain length, it can effectively drive the first spray pipe 51 to rotate.

[0063] The first spray pipe 51 may also have at least one first limiting groove 511 distributed circumferentially thereon, and the first hollow pivot portion 410 of the first output member 41 has at least one first limiting portion 414 that can fall into the at least one first limiting groove 511. In the illustrated embodiment, three first limiting grooves 511 and three first limiting portions 414 are provided. Through the cooperation between the first limiting portion 414 and the first limiting groove 511, the first spray pipe 51 can be prevented from disengaging from the first output member 41 along its longitudinal direction during rotation.

[0064] Similarly, the second spray pipe 52 may have at least one second guide groove 520 extending longitudinally therein, and the second hollow pivot portion 420 of the second output member 42 has at least one second guide rib 423 capable of being inserted into the at least one second guide groove 520. The second spray pipe 52 may have at least one second limiting groove 521 distributed circumferentially therein, and the second hollow pivot portion 420 of the second output member 42 has at least one second limiting portion 424 capable of falling into the at least one second limiting groove 521.

[0065] In summary, this utility model provides a spray device for a dishwasher, which effectively solves the problem of damage to the impeller and its transmission mechanism caused by excessive hydraulic pressure in the spray device in the prior art, while also avoiding liquid waste. Furthermore, this utility model simplifies and miniaturizes the structure of the spray device through optimized design of the spray pipe transmission mechanism.

[0066] The exemplary embodiments of this disclosure have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.

Claims

1. A spray device for a dishwasher, characterized in that, include: The housing (1) has a liquid inlet chamber (18) and a propeller chamber (19) downstream of the liquid inlet chamber (18). The impeller (2) is installed in the impeller chamber (19); A pressure relief assembly is provided near the hydraulic rise area between the inlet chamber (18) and the impeller chamber (19) to release liquid at or near the hydraulic rise area into another area inside the housing (1).

2. The spray device for a dishwasher as described in claim 1, characterized in that, The housing (1) includes a partition (10) that separates the liquid inlet chamber (18) and the impeller chamber (19) from the other area, and the partition (10) includes a pressure relief port (101), and the pressure relief assembly is configured to open or close the pressure relief port (101).

3. The spray device for a dishwasher as described in claim 2, characterized in that, The pressure relief assembly includes a baffle (31) for opening and closing the pressure relief port (101) and a spring (32) that interacts with the baffle (31), and the spring (32) applies a biasing force to the baffle (31) toward the pressure relief port (101).

4. The spray device for a dishwasher as described in claim 3, characterized in that, When the hydraulic pressure in the hydraulic rise area is less than a threshold pressure, the spring (32) keeps the baffle (31) closed at the pressure relief port (101); when the hydraulic pressure in the hydraulic rise area is greater than the threshold pressure, the liquid pushes the baffle (31) away from the pressure relief port (101) to overcome the bias force of the spring (32), so that the liquid is released into the other area.

5. The spray device for a dishwasher as described in claim 3, characterized in that, One end of the baffle (31) includes a first pivot (33), which is pivotally disposed in the housing (1).

6. The spray device for a dishwasher as described in claim 3, characterized in that, The side of the baffle (31) opposite to the pressure relief port (101) includes a protrusion (34), one end of the spring (32) is disposed on the protrusion (34), and the housing (1) also includes a spring seat (35), the other end of the spring (32) is disposed in the spring seat (35).

7. The spray device for a dishwasher as described in claim 2, characterized in that, The spring seat (35) is connected to the partition wall (10) via the connecting wall (36).

8. The spray device for a dishwasher as described in claim 2, characterized in that, The pressure relief assembly is configured as a flexible baffle, one end of which is fixed to the housing (1) near the pressure relief port (101), and the other end can move freely; when the hydraulic pressure in the hydraulic rise area is less than a threshold pressure, the flexible baffle keeps the pressure relief port (101) closed; when the hydraulic pressure in the hydraulic rise area is greater than the threshold pressure, the liquid pushes the flexible baffle to deflect through the pressure relief port (101), so that the liquid is released to the other area.

9. The spray device for a dishwasher as described in any one of claims 2-8, characterized in that, Includes a first flow channel (11) and a second flow channel (12) branching downstream from the impeller chamber (19), wherein: The first flow channel (11) has a first liquid outlet (111) at its end. The second flow channel (12) is defined by the partition wall (10), and the end of the second flow channel (12) has a second outlet (121), and the second flow channel (12) is the other region.

10. The spray device for a dishwasher as described in claim 9, characterized in that: The housing (1) also includes a pivot hole (13), in which a second pivot (23) of the impeller (2) is pivotally disposed, and the second pivot (23) of the impeller (2) has a drive (230) extending into a transmission chamber (17) of the housing (1), the transmission chamber (17) being located on the side of the housing (1) opposite to the liquid inlet chamber (18) and the impeller chamber (19); The spray system also includes: The first output member (41) has a first hollow pivot portion (410) and a first driven portion (411). The first hollow pivot portion (410) is pivotally disposed in the first liquid outlet (111), and the first driven portion (411) is disposed on the portion of the first hollow pivot portion (410) that extends into the transmission chamber (17). The first spray pipe (51) is fixedly connected to and in fluid communication with the first hollow pivot part (410); The driving part (230) of the impeller (2) is rotatably connected to the first driven part (411), so that the rotation of the impeller (2) will drive the first output part (41) and the first spray pipe (51) to rotate together.

11. The spray device for a dishwasher as claimed in claim 10, characterized in that, Also includes: The second output member (42) has a second hollow pivot portion (420) and a second driven portion (421). The second hollow pivot portion (420) is pivotally disposed in the second liquid outlet (121), and the second driven portion (421) is disposed on the portion of the second hollow pivot portion (420) that extends into the transmission chamber (17). The second spray pipe (52) is fixedly connected to and in fluid communication with the second hollow pivot part (420); The driving part (230) of the impeller (2) is rotatably connected to the second driven part (421), so that the rotation of the impeller (2) will drive the second output part (42) and the second spray pipe (52) to rotate together.

12. The spray device for a dishwasher as claimed in claim 11, characterized in that, The drive part (230) of the impeller (2) is formed as a drive gear, the first driven part (411) is formed as a first gear, and the second driven part (421) is formed as a second gear. The drive gear is connected to the first gear through the first transmission gear (91), and the drive gear is connected to the second gear through the second transmission gear (92).

13. The spray device for a dishwasher as claimed in claim 12, characterized in that, The rotation centers of the paddle wheel (2), the first gear of the first output component (41), the second gear of the second output component (42), the first transmission gear (91), and the second transmission gear (92) are located on a straight line.

14. The spray device for a dishwasher as claimed in claim 11, characterized in that, The first spray pipe (51) has at least one first guide groove (510) extending longitudinally therein, and the first hollow pivot portion (410) of the first output member (41) has at least one first guide rib (413) capable of being inserted into the at least one first guide groove (510); and / or The first spray pipe (51) has at least one first limiting groove (511) distributed along its circumference, and the first hollow pivot portion (410) of the first output member (41) has at least one first limiting portion (414) that can fall into the at least one first limiting groove (511).

15. The spray device for a dishwasher as claimed in claim 11, characterized in that, The second spray pipe (52) has at least one second guide groove (520) extending longitudinally therein, and the second hollow pivot portion (420) of the second output member (42) has at least one second guide rib (423) capable of being inserted into the at least one second guide groove (520); and / or The second spray pipe (52) has at least one second limiting groove (521) distributed along its circumference, and the second hollow pivot portion (420) of the second output member (42) has at least one second limiting portion (424) that can fall into the at least one second limiting groove (521).

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