Spray arm for a dishwasher and dishwasher

Abstract

The utility model relates to a kind of spray arm and cleaning machine for cleaning machine, including body, first flow passage, second flow passage are arranged in body to constitute X-shaped structure by being arranged in cross, flexible expansion piece is arranged in body respectively corresponding first flow passage, second flow passage entrance arrangement, the first end of this flexible expansion piece is constrained at the separation of first flow passage and second flow passage, the second end of this flexible expansion piece can be constrained at the entrance of first flow passage, second flow passage sliding, the flexible expansion piece is scaled and slides with the pressure of water injection instant to realize the on-off switching of first flow passage, second flow passage.In the instant of water injection of spray arm, flexible expansion piece stretches under water pressure impact while sliding to open first flow passage, second flow passage is closed;In the instant of water stop, flexible expansion piece retracts;In the instant of water injection again, flexible expansion piece stretches while sliding under water pressure impact to open second flow passage, first flow passage is closed.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher technology, specifically to a middle spray arm and a washing machine for cleaning tableware, fruits and vegetables. Background Technology

[0002] Currently, dishwashers with larger capacities generally have at least two spray systems, one above the other. The upper spray arm is usually rotatably connected to the water supply pipe in the middle, spraying upwards to rinse the dishes in the upper basket.

[0003] Chinese utility model patent CN208193082U, entitled "A Dishwasher" (application number: CN201820011032.5), discloses a structure that connects the upper spray arm to the water supply pipe. The structure includes a spray arm assembly and a water inlet pipe. The spray arm assembly includes a spray arm and an adapter. The first end of the adapter is connected to the spray arm, and the second end of the adapter is connected to the water inlet pipe. The adapter has a water passage, and the water inlet pipe is connected to the spray arm through the water passage.

[0004] The aforementioned spray arm structure is installed in the middle of the cabinet and can spray and clean the tableware in the upper dish rack. However, because some energy is lost during the upward transport of the water, the spray head is reduced and the spray force is weak, which can easily lead to cleaning dead spots and affect the cleaning effect. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to provide a spray arm for a cleaning machine that expands the spray range and improves the cleaning effect by switching the flow channel, in light of the current state of the technology.

[0006] The second technical problem to be solved by this utility model is to provide a cleaning machine with the above-mentioned spray arm, in view of the current situation of the prior art.

[0007] The technical solution adopted by this utility model to solve at least one of the above-mentioned technical problems is as follows:

[0008] A spray arm for a cleaning machine includes a body, in which a first flow channel and a second flow channel are arranged in a cross-shaped manner to form an X-shape. The side wall of the body has a water inlet arranged at the intersection of the X-shape. The body is provided with a flexible telescopic member arranged at the inlet of the first flow channel and the second flow channel, respectively. The first end of the flexible telescopic member is constrained at the separation point of the first flow channel and the second flow channel, and the second end of the flexible telescopic member is slidably constrained at the inlet of the first flow channel and the second flow channel. The flexible telescopic member expands and contracts and slides with the pressure of water injection, thereby realizing the switching of the first flow channel and the second flow channel.

[0009] With the above structure, at the moment water is injected into the spray arm, the flexible telescopic component slides and extends under the impact of water pressure, thereby opening the first flow channel and closing the second flow channel; at the moment water stops, the flexible telescopic component retracts; at the moment water is injected again, the flexible telescopic component slides and extends under the impact of water pressure, thereby opening the second flow channel and closing the first flow channel; by switching the water flow, the switching between the first and second flow channels is realized, thereby enabling spraying of different ranges through the nozzles on different flow channels, which is beneficial to expanding the spray range and improving the cleaning effect.

[0010] Preferably, the second end of the flexible telescopic member is provided with a vertical connecting shaft, and correspondingly, the inner wall of the main body is provided with a reversing groove for the end of the connecting shaft to slide and constrain therein. The reversing groove is used to achieve directional sliding with the expansion and contraction of the flexible telescopic member, thereby realizing the switching between the first flow channel and the second flow channel, making the reversing process stable and reliable.

[0011] Preferably, the reversing groove includes a first arc-shaped portion and a second arc-shaped portion, both of which arch towards the inlet. The middle portions of the first and second arc-shaped portions are intersecting and connected, and their ends extend to the outer edges of the first and second flow channels respectively and connect with each other, thereby forming a limiting loop for the connecting shaft to circulate back and forth. This structure provides directional sliding limitation for the connecting shaft at the end of the flexible telescopic component in a telescopic state, ensuring a stable and reliable reversing process.

[0012] Preferably, the first end of the first arc-shaped portion connects to the outer edge of the first flow channel inlet, the first end of the second arc-shaped portion connects to the outer edge of the second flow channel inlet, the second end of the first arc-shaped portion is close to the outer edge of the second flow channel inlet and connects to the first end of the second arc-shaped portion through a first extension, and the second end of the second arc-shaped portion is close to the outer edge of the first flow channel inlet and connects to the first end of the first arc-shaped portion through a second extension. This closed-loop limiting circuit structure facilitates precise switching between the first and second flow channels in response to water pressure impacts and the expansion and contraction of the flexible expansion member.

[0013] Preferably, the junction of the second end of the first arc-shaped portion and the first extension segment forms a first limiting portion that can temporarily limit the connecting shaft in the retracted state of the flexible telescopic member; the junction of the first extension segment and the first end of the second arc-shaped portion forms a third limiting portion that can temporarily limit the connecting shaft in the extended state of the flexible telescopic member; the junction of the second end of the second arc-shaped portion and the second extension segment forms a second limiting portion that can temporarily limit the connecting shaft in the retracted state of the flexible telescopic member; and the junction of the second extension segment and the first end of the first arc-shaped portion forms a fourth limiting portion that can temporarily limit the connecting shaft in the extended state of the flexible telescopic member. This structure provides stable limiting for the flexible telescopic member in both retracted and extended states, preventing undesirable displacement that could affect its use.

[0014] In this invention, the reversing groove is formed to create a closed-loop limiting circuit through which the connecting shaft sequentially passes via a second limiting part, a second extension section, a fourth limiting part, a first arc-shaped part, a first limiting part, a first extension section, a third limiting part, a second arc-shaped part, and a second limiting part. This closed-loop limiting circuit ensures precise and reliable reversal of the first and second flow channels as the flexible telescopic component expands and contracts.

[0015] Preferably, a first protrusion is formed at the end of the first extension corresponding to the third limiting portion, and the height of the first extension gradually decreases from the first protrusion to the first limiting portion to form a first guide platform; a second protrusion is formed at the end of the second extension corresponding to the fourth limiting portion, and the height of the second extension gradually decreases from the second protrusion to the second limiting portion to form a second guide platform. This structure ensures that the connecting shaft can slide unidirectionally in the required direction at the limiting nodes, preventing reverse sliding of the connecting shaft.

[0016] Preferably, the main body is provided with a baffle that can separate the adjacent first flow channel and the second flow channel. The inner end of the baffle is located beside the water inlet, and the first end of the flexible expansion member is constrained at the inner end of the baffle. This structure facilitates the separation of flow channels and the connection of the flexible expansion member.

[0017] Preferably, the top wall of the main body has a first spray hole arranged corresponding to the first flow channel and a second spray hole arranged corresponding to the second flow channel. The spray angles of the first and second spray holes are different. The first spray hole is used to drive the main body to rotate forward in the jet state, and the second spray hole is used to drive the main body to rotate backward in the jet state. With this structure, as the first and second flow channels are switched, the spray arm can also switch between forward and reverse rotation to further expand the spray range, eliminate cleaning dead corners, and improve the cleaning effect.

[0018] A cleaning machine includes a housing and the aforementioned spray arm.

[0019] Compared with the prior art, the advantages of this utility model are as follows: This utility model adopts a first and second flow channel structure arranged in an X-shape, and a flexible telescopic component that can slide and extend is set at the inlet of the adjacent flow channel. At the moment when water is injected into the spray arm, the flexible telescopic component slides and extends under the impact of water pressure, thereby opening the first flow channel and closing the second flow channel; at the moment when water stops, the flexible telescopic component retracts; at the moment when water is injected again, the flexible telescopic component slides and extends under the impact of water pressure, thereby opening the second flow channel and closing the first flow channel; by switching the water flow, the switching between the first and second flow channels is realized, so that different ranges of spraying can be achieved by using the spray holes on different flow channels, which is conducive to expanding the spray range and improving the cleaning effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the spray arm in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the flow channel structure of the spray arm in an embodiment of this utility model;

[0022] Figure 3 for Figure 2 A magnified view of the initial state;

[0023] Figure 4 For the Figure 3 A diagram showing the state of the water after filling;

[0024] Figure 5 For the Figure 4 Diagram showing the state after water supply is cut off;

[0025] Figure 6 For the Figure 5 The diagram shows the state of the room after water injection. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1-6 As shown, the spray arm for the cleaning machine in this embodiment includes a body 1. The body 1 is provided with a first flow channel 11 and a second flow channel 12 arranged in a cross-shaped manner to form an X-shaped structure. The side wall of the body 1 is provided with a water inlet 13 arranged at the intersection of the X-shaped structure. The body 1 is provided with a flexible telescopic member 2 arranged at the inlet of the first flow channel 11 and the second flow channel 12 respectively. The first end of the flexible telescopic member 2 is constrained at the separation of the first flow channel 11 and the second flow channel 12, and the second end of the flexible telescopic member 2 can be slidably constrained at the inlet of the first flow channel 11 and the second flow channel 12. The flexible telescopic member 2 expands and contracts and slides with the pressure of water injection, thereby realizing the switching of the first flow channel 11 and the second flow channel 12.

[0028] In this embodiment, the flexible telescopic component 2 is made of materials such as silicone with good elasticity, and the ends of the flexible telescopic component 2 are connected and fixed by a rigid structure.

[0029] With the above structure, at the moment the spray arm is filled with water, the flexible telescopic component 2 slides and extends under the impact of water pressure, thereby opening the first flow channel 11 and closing the second flow channel 12; at the moment the water stops, the flexible telescopic component 2 retracts; at the moment the water is filled again, the flexible telescopic component 2 slides and extends under the impact of water pressure, thereby opening the second flow channel 12 and closing the first flow channel 11; by switching the water flow, the switching between the first flow channel 11 and the second flow channel 12 is realized, thereby enabling spraying of different ranges by means of the spray holes on different flow channels, which is beneficial to expanding the spray range and improving the cleaning effect.

[0030] The second end of the flexible telescopic member 2 is provided with a vertical connecting shaft 21. Correspondingly, the inner wall of the body 1 is provided with a reversing groove 100 for the end of the connecting shaft 21 to slide and constrain it. The reversing groove 100 is used to achieve directional sliding with the extension and contraction of the flexible telescopic member 2, thereby realizing the switching of the first flow channel 11 and the second flow channel 12, making the reversing process stable and reliable.

[0031] The reversing groove 100 includes a first arc-shaped portion 10 and a second arc-shaped portion 20. Both the first arc-shaped portion 10 and the second arc-shaped portion 20 arch towards the inlet 13. The middle portions of the first arc-shaped portion 10 and the second arc-shaped portion 20 are arranged intersecting and connected, and their ends extend to the outer edges of the first flow channel 11 and the second flow channel 12, respectively, and connect with each other, thereby forming a limiting loop for the connecting shaft 21 to circulate back and forth. With the above structure, the connecting shaft 21 at the end of the flexible telescopic member 2 is provided with directional sliding limit in the telescopic state, so as to make the reversing process stable and reliable.

[0032] The first end of the first arc-shaped portion 10 connects to the outer edge of the inlet of the first flow channel 11, and the first end of the second arc-shaped portion 20 connects to the outer edge of the inlet of the second flow channel 12. The second end of the first arc-shaped portion 10 is close to the outer edge of the inlet of the second flow channel 12 and connects to the first end of the second arc-shaped portion 20 through the first extension section 01. The second end of the second arc-shaped portion 20 is close to the outer edge of the inlet of the first flow channel 11 and connects to the first end of the first arc-shaped portion 10 through the second extension section 02. This structure forms a closed-loop limiting circuit, which is beneficial for achieving precise switching between the first flow channel 11 and the second flow channel 12 in conjunction with water pressure impact and the extension and retraction of the flexible telescopic member 2.

[0033] At the junction of the second end of the first arc-shaped portion 10 and the first extension segment 01, a first limiting portion 001 is formed, which can temporarily limit the connecting shaft 21 when the flexible telescopic member 2 is in the retracted state. At the junction of the first extension segment 01 and the first end of the second arc-shaped portion 20, a third limiting portion 003 is formed, which can temporarily limit the connecting shaft 21 when the flexible telescopic member 2 is in the extended state. At the junction of the second end of the second arc-shaped portion 20 and the second extension segment 02, a second limiting portion 002 is formed, which can temporarily limit the connecting shaft 21 when the flexible telescopic member 2 is in the retracted state. At the junction of the second extension segment 02 and the first end of the first arc-shaped portion 10, a fourth limiting portion 004 is formed, which can temporarily limit the connecting shaft 21 when the flexible telescopic member 2 is in the extended state. This structure is adopted to stably limit the flexible telescopic member 2 in the retracted or extended state, and to avoid displacement that would affect its use due to undesirable circumstances.

[0034] In this embodiment, the reversing groove 100 forms a closed-loop limiting circuit through which the connecting shaft 21 sequentially passes via the second limiting part 002, the second extension section 02, the fourth limiting part 004, the first arc-shaped part 10, the first limiting part 001, the first extension section 01, the third limiting part 003, the second arc-shaped part 20, and the second limiting part 002. This closed-loop limiting circuit enables precise and reliable reversing of the first flow channel 11 and the second flow channel 12 as the flexible telescopic member 2 extends and retracts.

[0035] The first extension segment 01 forms a first boss 011 at the end corresponding to the third limiting part 003. The height of the first extension segment 01 gradually decreases from the first boss 011 to the first limiting part 001 to form a first guide platform 012. The second extension segment 02 forms a second boss 021 at the end corresponding to the fourth limiting part 004. The height of the second extension segment 02 gradually decreases from the second boss 021 to the second limiting part 002 to form a second guide platform 022. This structure ensures that the connecting shaft 21 can slide unidirectionally in the required direction at the limiting nodes, preventing the connecting shaft 21 from sliding in the opposite direction.

[0036] The main body 1 is provided with a baffle 16 that can separate the adjacent first flow channel 11 and second flow channel 12. The inner end of the baffle 16 is located next to the inlet 13, and the first end of the flexible expansion member 2 is constrained at the inner end of the baffle 16. This structure facilitates the separation of flow channels and the connection of the flexible expansion member 2.

[0037] The top wall of the main body 1 has a first nozzle 14 arranged corresponding to the first flow channel 11 and a second nozzle 15 arranged corresponding to the second flow channel 12. The spray angles of the first nozzle 14 and the second nozzle 15 are different. The first nozzle 14 is used to drive the main body 1 to rotate forward in the jet state, and the second nozzle 15 is used to drive the main body 1 to rotate backward in the jet state. With this structure, as the first flow channel 11 and the second flow channel 12 are switched, the spray arm can also switch between forward and reverse rotation to further expand the spray range, eliminate cleaning dead corners, and improve the cleaning effect.

[0038] The cleaning machine in this embodiment includes a housing and the aforementioned spray arm.

[0039] The usage process of the structure in this embodiment is as follows:

[0040] In the initial state, the connecting shaft 21 of the flexible telescopic member 2 is constrained at the second limiting part 002 formed by the connection between the second end of the second arc-shaped portion 20 and the second extension section 02. At the moment of water injection, the flexible telescopic member 2 extends under the impact of water pressure, and the connecting shaft 21 slides through the second extension section 02 to the fourth limiting part 004 at the first end of the first arc-shaped portion 10 and is limited. At this time, the first flow channel 11 is connected and the second flow channel 12 is closed.

[0041] When the water supply to the spray arm is cut off, the flexible telescopic component 2 retracts under its own elastic force, and the connecting shaft 21 slides through the first arc-shaped portion 10 to the first limiting portion 001 at the junction of the second end of the first arc-shaped portion 10 and the first extension section 01.

[0042] Water is supplied to the spray arm again, and the flexible telescopic component 2 extends under the impact of water pressure. The connecting shaft 21 slides through the first extension section 01 to the third limiting part 003 at the first end of the second arc-shaped part 20 and is limited. At this time, the first flow channel 11 is closed and the second flow channel 12 is connected.

[0043] The water supply to the spray arm is cut off again, and the flexible telescopic component 2 retracts under its own elastic force. The connecting shaft 21 slides through the second arc-shaped part 20 and is limited at the second limiting part 002 where the second end of the second arc-shaped part 20 connects with the second extension section 02.

[0044] This embodiment employs a cross-shaped arrangement of a first flow channel 11 and a second flow channel 12, with flexible telescopic components 2 at the inlets of adjacent flow channels. When water is injected into the spray arm, the flexible telescopic component 2 slides and extends under water pressure, opening the first flow channel 11 and closing the second flow channel 12. When water is stopped, the flexible telescopic component 2 retracts. When water is injected again, the flexible telescopic component 2 slides and extends under water pressure, opening the second flow channel 12 and closing the first flow channel 11. By switching the water flow, the switching between the first flow channel 11 and the second flow channel 12 is achieved, allowing for spraying of different ranges using nozzles on different flow channels, thus expanding the spray range and improving the cleaning effect.

[0045] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A spray arm for a cleaning machine, comprising a body (1), wherein the body (1) is provided with a first flow channel (11) and a second flow channel (12) arranged in a cross-shaped manner to form an X-shape, and the side wall of the body (1) is provided with a water inlet (13) arranged at the intersection of the X-shape, characterized in that: The main body (1) is provided with flexible telescopic members (2) respectively arranged corresponding to the inlets of the first flow channel (11) and the second flow channel (12). The first end of the flexible telescopic member (2) is constrained at the separation point between the first flow channel (11) and the second flow channel (12), and the second end of the flexible telescopic member (2) can be slidably constrained at the inlets of the first flow channel (11) and the second flow channel (12). The flexible telescopic member (2) expands and contracts and slides with the pressure of water injection, thereby realizing the switching of the first flow channel (11) and the second flow channel (12).

2. The spray arm for a cleaning machine according to claim 1, characterized in that: The second end of the flexible telescopic member (2) is provided with a vertical connecting shaft (21), and correspondingly, the inner wall of the body (1) is provided with a reversing groove (100) for the end of the connecting shaft (21) to slide and constrain it.

3. The spray arm for a cleaning machine according to claim 2, characterized in that: The reversing groove (100) includes a first arc-shaped portion (10) and a second arc-shaped portion (20). Both the first arc-shaped portion (10) and the second arc-shaped portion (20) arch towards the inlet (13). The middle parts of the first arc-shaped portion (10) and the second arc-shaped portion (20) are arranged crosswise and connected, and their ends extend to the outer edges of the first flow channel (11) and the second flow channel (12) respectively and connect with each other, thereby forming a limiting loop for the connecting shaft (21) to circulate back and forth.

4. The spray arm for a cleaning machine according to claim 3, characterized in that: The first end of the first arc-shaped portion (10) is connected to the outer edge of the inlet of the first flow channel (11), the first end of the second arc-shaped portion (20) is connected to the outer edge of the inlet of the second flow channel (12), the second end of the first arc-shaped portion (10) is close to the outer edge of the inlet of the second flow channel (12) and is connected to the first end of the second arc-shaped portion (20) through the first extension section (01), and the second end of the second arc-shaped portion (20) is close to the outer edge of the inlet of the first flow channel (11) and is connected to the first end of the first arc-shaped portion (10) through the second extension section (02).

5. The spray arm for a cleaning machine according to claim 4, characterized in that: A first limiting part (001) is formed at the junction of the second end of the first arc-shaped portion (10) and the first extension section (01) to temporarily limit the connecting shaft (21) in the contracted state of the flexible telescopic member (2). A third limiting part (003) is formed at the junction of the first extension section (01) and the first end of the second arc-shaped portion (20) to temporarily limit the connecting shaft (21) in the extended state of the flexible telescopic member (2). A second limiting part (002) is formed at the junction of the second end of the second arc-shaped portion (20) and the second extension section (02) to temporarily limit the connecting shaft (21) in the contracted state of the flexible telescopic member (2). A fourth limiting part (004) is formed at the junction of the second extension section (02) and the first end of the first arc-shaped portion (10) to temporarily limit the connecting shaft (21) in the extended state of the flexible telescopic member (2).

6. The spray arm for a cleaning machine according to claim 5, characterized in that: The reversing groove (100) forms a closed-loop limiting circuit for the connecting shaft (21) to pass sequentially through the second limiting part (002), the second extension section (02), the fourth limiting part (004), the first arc-shaped part (10), the first limiting part (001), the first extension section (01), the third limiting part (003), the second arc-shaped part (20), and the second limiting part (002).

7. The spray arm for a cleaning machine according to claim 5, characterized in that: The first extension segment (01) forms a first boss (011) at the end corresponding to the third limiting part (003), and the height of the first extension segment (01) gradually decreases from the first boss (011) to the first limiting part (001) to form a first guide platform (012); the second extension segment (02) forms a second boss (021) at the end corresponding to the fourth limiting part (004), and the height of the second extension segment (02) gradually decreases from the second boss (021) to the second limiting part (002) to form a second guide platform (022).

8. The spray arm for a cleaning machine according to any one of claims 1 to 7, characterized in that: The main body (1) is provided with a partition (16) that can separate the adjacent first flow channel (11) and second flow channel (12). The inner end of the partition (16) is located on the side of the water inlet (13), and the first end of the flexible telescopic member (2) is constrained at the inner end of the partition (16).

9. The spray arm for a cleaning machine according to any one of claims 1 to 7, characterized in that: The top wall of the body (1) is provided with a first nozzle (14) arranged corresponding to the first flow channel (11) and a second nozzle (15) arranged corresponding to the second flow channel (12). The first nozzle (14) and the second nozzle (15) have different spray angles. The first nozzle (14) is used to drive the body (1) to rotate forward in the jet state, and the second nozzle (15) is used to drive the body (1) to rotate backward in the jet state.

10. A cleaning machine, comprising a housing, characterized in that: It also includes the spray arm according to any one of claims 1 to 9.

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