Small-sized dual-flow switchover device

Abstract

Disclosed in the present invention is a small-sized dual-flow switchover device, comprising a flow control member, a driving mechanism, an upper cover, and a housing. A water inlet flow channel having a flow channel valve seat is provided between the upper cover and the housing in a penetrating manner; and the flow control member is located in the water inlet flow channel and has a water passing gap through which water can pass. On one hand, the flow control member can be pressed against the flow channel valve seat under the action of a water flow impact force so as to partially close the water inlet flow channel; and on the other hand, the flow control member can be pushed away from the flow channel valve seat by the driving mechanism so as to further open the water inlet flow channel. The present invention can achieve switching between high and low flow, and the apparatus has a small size and is not prone to water leakage.

Description

Small dual-flow switcher TECHNICAL FIELD

[0001] The present application relates to the technical field of dispensing devices, in particular the technical field of flow switchers. BACKGROUND

[0002] A dispensing device is a device applied in an electrical washing equipment such as a washing machine or a dishwasher to automatically dispense a detergent, a softener or a sterilizer and the like. For example, a washing agent dispenser assembly disclosed in an application with the publication number CN110924080A and a liquid washing agent dispensing device disclosed in an application with the publication number CN102031675B. For the dispenser, a user needs to store the agent to be dispensed in a designated container in advance, and the electrical washing equipment then pours them into the inside of the washing drum through water or other mechanical methods according to the washing process.

[0003] A flow switcher is generally installed in the dispensing device. As shown in FIG. 1, in order to realize dispensing of different flows, the existing flow switcher usually has multiple water outlets in the shell b, and a flow control piece c with different water passing gaps is additionally installed at each water outlet. With this design, on the one hand, the number of flow control pieces c required to be assembled by the flow switcher is large, and on the other hand, the flow size of each water outlet cannot be switched (water can only flow out along the water passing gap). In addition, referring to FIG. 1, the flow control piece c installed at each water outlet also causes the upper cover a and the inside of the shell b to be simultaneously under pressure (when small flow dispensing is performed, the pressure is even greater), thereby causing the solder line between the upper cover a and the shell b to be very easy to crack and leak (if a sheet of iron is installed for reinforcement, the manufacturing cost of the flow switcher will be increased). SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art, and to provide a small dual-flow switcher which can realize flow switching and has a small size and is not easy to leak.

[0005] To achieve the above purpose, the present application provides a small dual-flow switcher, which comprises a flow control piece, a driving mechanism, an upper cover and a shell, a water inlet channel with a channel valve seat is provided between the upper cover and the shell, the flow control piece is located in the water inlet channel and has a water passing gap through which water can pass, the flow control piece can be tightly attached to the channel valve seat to semi-close the water inlet channel under the action of water flow impact force, and the flow control piece can also be driven by the driving mechanism to be separated from the channel valve seat to further open the water inlet channel.

[0006] As a preferred embodiment, the driving mechanism comprises a crankshaft and a piston, the piston is sleeved outside the crankshaft and has a convex wall structure between adjacent surfaces, and the crankshaft can drive the piston to linearly slide along the water inlet channel during rotation through the convex wall structure.

[0007] As preferred, the crankshaft passes through the piston along the hole and is provided with a shaft protrusion at the shaft wall, the inner wall of the hole is provided with a plug protrusion which can support the shaft protrusion, and the shaft protrusion and the plug protrusion jointly form a protrusion wall structure.

[0008] As preferred, the surface of the shaft protrusion is further provided with a pit in which the plug protrusion can sink.

[0009] As preferred, the flow control member comprises a flow washer, a flow control plate and a mandrel, one end of the mandrel supports the piston after passing through the flow washer and the flow control plate along the hole and the plate hole in sequence, there is a slit between the flow washer and the flow control plate, and the slit and the plate hole jointly form a water passing gap.

[0010] As preferred, the outer wall of the flow control plate is provided with a plate body ring groove, and a plate body sealing ring which can elastically abut against the flow passage valve seat is installed in the plate body ring groove.

[0011] As preferred, the piston is provided with a protruding column which can support the mandrel.

[0012] As preferred, the flow control member and the driving mechanism are respectively arranged in the upper cover and the shell.

[0013] The beneficial effects of the present application are as follows:

[0014] 1) By associating the flow control member with the driving mechanism, the water can be discharged at a small flow rate by using the water passing gap of the flow control member itself, and the water can be discharged at a large flow rate by using the driving mechanism to drive the flow control member to move linearly along the water inlet flow passage until it is separated from the flow passage valve seat and opens the outside passage, so that the water flow rate can be switched under the same water inlet condition, without the need for two different flow rate water inlet valves.

[0015] 2) By installing the flow control member in the interior of the upper cover instead of the water outlet position of the water inlet flow passage, on the one hand, only the upper cover is under pressure during operation (i.e. the shell is not under pressure during operation), thereby effectively avoiding the phenomenon of solder cracking and water leakage between the upper cover and the shell, ensuring the working safety of the device, and on the other hand, the flow control member can cooperate with the driving mechanism to enable the water outlet to switch between large and small flow rates, thereby making the device more flexible to use.

[0016] 3) By providing the shaft protrusion with a pit at the shaft wall of the crankshaft, and the plug protrusion at the inner wall of the hole, the shaft protrusion and the plug protrusion jointly form a protrusion wall structure, so that different parts of the shaft protrusion can be supported by the plug protrusion to enable the piston to linearly slide to the designated position along the water inlet flow passage, thereby ensuring the smooth switching of the double flow rates.

[0017] The features and advantages of the present application will be illustrated in detail by examples in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a schematic diagram of the internal structure of a prior art flow switcher;

[0019] Fig. 2 is a schematic diagram of the operation of a small-sized double-flow switcher of the present application in a small-flow state;

[0020] Fig. 3 is an enlarged schematic diagram of A in Fig. 2;

[0021] Fig. 4 is an enlarged schematic diagram of B in Fig. 2;

[0022] Fig. 5 is a schematic diagram of the operation of a small-sized double-flow switcher of the present application in a large-flow state;

[0023] Fig. 6 is an enlarged schematic diagram of C in Fig. 5;

[0024] Fig. 7 is an enlarged schematic diagram of D in Fig. 5.

[0025] In the drawings: 1 - flow control member, 11 - flow gasket, 12 - flow control plate, 121 - plate body ring groove, 13 - mandrel, 14 - water passage gap, 15 - plate body sealing ring, 2 - drive mechanism, 21 - crankshaft, 211 - shaft protrusion, 2111 - pit, 22 - piston, 221 - plug protrusion, 222 - protruding column, 3 - upper cover, 4 - housing, a - upper cover, b - housing, c - flow control member. DETAILED DESCRIPTION

[0026] Referring to Figs. 2 to 7, the small-sized double-flow switcher of the present application comprises a flow control member 1, a drive mechanism 2, an upper cover 3 and a housing 4, a water inlet flow channel with a flow channel valve seat is provided through the upper cover 3 and the housing 4, the flow control member 1 is located in the water inlet flow channel and has a water passage gap 14 through which water can pass, the flow control member 1 can be tightly attached to the flow channel valve seat to semi-close the water inlet flow channel under the action of gravity and water flow impact force, and can also be lifted away from the flow channel valve seat by the drive mechanism 2 to further open the water inlet flow channel.

[0027] The drive mechanism 2 comprises a crankshaft 21 and a piston 22, the piston 22 is sleeved outside the crankshaft 21 and a convex wall structure is provided between the adjacent surfaces, the crankshaft 21 can drive the piston 22 to linearly slide along the water inlet flow channel during rotation through the convex wall structure.

[0028] The crankshaft 21 passes through the piston 22 along a plug hole and a shaft protrusion 211 is provided at the shaft wall, the inner wall of the plug hole is provided with a plug protrusion 221 which can be supported by the shaft protrusion 211, and the shaft protrusion 211 and the plug protrusion 221 jointly constitute the convex wall structure.

[0029] The surface of the shaft protrusion 211 is also provided with a pit 2111 for the plug protrusion 221 to sink into.

[0030] The flow control piece 1 comprises a flow gasket 11, a flow control plate 12 and a mandrel 13, one end of the mandrel 13 is supported by the piston 22 after sequentially penetrating the flow gasket 11 and the flow control plate 12 along the ring hole and the plate hole, a slit exists between the flow gasket 11 and the flow control plate 12, and the slit and the plate hole jointly form a water passing gap 14.

[0031] An outer wall of the flow control plate 12 is provided with a plate body ring groove 121, and a plate body sealing ring 15 elastically abutting against the flow passage valve seat is installed in the plate body ring groove 121.

[0032] The piston 22 is provided with a convex column 222 for supporting the mandrel 13.

[0033] The flow control piece 1 and the driving mechanism 2 are respectively arranged in the upper cover 3 and the shell 4, and a water drainage pipeline is further arranged on the upper cover 3, the water drainage pipeline is connected to the atmosphere and the water inlet passage through an air inlet branch pipe and a water drainage branch pipe respectively, and the air inlet branch pipe and the water drainage branch pipe are opened and closed through valves.

[0034] The valves comprise a second driving mechanism 5 and a spring 6, the second driving mechanism 5 comprises a second crankshaft 51 and a second piston 52, the second piston 52 is sleeved outside the second crankshaft 51 and is provided with a second convex wall structure between adjacent surfaces, the second crankshaft 51 can drive the second piston 52 to linearly slide along the air inlet branch pipe or the water drainage branch pipe through the second convex wall structure during rotation, and the spring 6 has an elastic tendency of pushing the second piston 52 to close the air inlet branch pipe or the water drainage branch pipe.

[0035] Branch pipe valve seats are respectively arranged in the air inlet branch pipe and the water drainage branch pipe, an outer wall of the second piston 52 is provided with a plug body ring groove 521, a plug body sealing ring 53 elastically abutting against the branch pipe valve seat is installed in the plug body ring groove 521, and an insertion column 522 for being inserted with the spring 6 is further arranged on the second piston 52.

[0036] The working process of the present application is as follows:

[0037] Referring to FIGS. 2 to 4, in the small flow state, the crankshaft 21 is rotated to a position where the pit 2111 is opposite to the plug protrusion 221. At this time, under the action of the water flow impact force, the flow control piece 1 and the piston 22 are both lowered, thereby on the one hand, the flow control plate 12 is sealed between the flow passage valve seat through the plate body sealing ring 15, and on the other hand, the plug protrusion 221 sinks into the pit 2111. As shown in FIG. 2, since the outer side passage is closed, the water can only pass through the flow control piece 1 along the water passing gap 14 (the flow path area is small, which is the small flow mode).

[0038] Referring to FIGS. 5 to 7, in the large flow state, the crankshaft 21 rotates to a position where the shaft protrusion 211 is directly opposite the plug protrusion 221. At this time, the crankshaft 21 lifts the piston 22 upward through the shaft protrusion 211, and pushes the flow control member 1 upward using the protrusion 222 until the flow control member 1 leaves the flow passage seat and opens the outside passage. As shown in FIG. 5, because the outside passage is open, water can pass through the flow control member 1 through the outside passage in addition to the water gap 14 (flow passage area is large, large flow mode).

[0039] The above embodiments are illustrative of the present application, but not limiting of the present application. Any simple modification of the present application is within the scope of the present application.

Claims

1. A small dual-flow switcher, characterized in that: It includes a flow control component (1), a drive mechanism (2), a top cover (3) and a housing (4). A water inlet channel with a flow channel valve seat is provided between the top cover (3) and the housing (4). The flow control component (1) is located in the water inlet channel and has a water passage gap (14) for water to pass through. The flow control component (1) can be pressed tightly against the flow channel valve seat under the action of water flow impact force to partially close the water inlet channel. On the other hand, it can also be pushed away from the flow channel valve seat by the drive mechanism (2) to further open the water inlet channel.

2. The miniature dual-flow switcher as described in claim 1, characterized in that: The drive mechanism (2) includes a crankshaft (21) and a piston (22). The piston (22) is sleeved outside the crankshaft (21) and has a convex wall structure between adjacent surfaces. The crankshaft (21) can drive the piston (22) to slide linearly along the water inlet channel through the convex wall structure during rotation.

3. The miniature dual-flow switcher as described in claim 2, characterized in that: The crankshaft (21) passes through the piston (22) along the plug hole and has a shaft protrusion (211) on the shaft wall. The inner wall of the plug hole has a plug protrusion (221) that can abut against the shaft protrusion (211). The shaft protrusion (211) and the plug protrusion (221) together form a convex wall structure.

4. The miniature dual-flow switcher as described in claim 3, characterized in that: The surface of the shaft protrusion (211) is also provided with a recess (2111) into which the protrusion (221) can sink.

5. The miniature dual-flow switcher as described in claim 2, characterized in that: The flow control component (1) includes a flow washer (11), a flow control plate (12), and a spindle (13). One end of the spindle (13) passes through the flow washer (11) and the flow control plate (12) in sequence along the ring hole and the plate hole and then abuts against the piston (22). There is a slit between the flow washer (11) and the flow control plate (12). The slit and the plate hole together form a water passage gap (14).

6. The miniature dual-flow switch as described in claim 5, characterized in that: The flow control plate (12) has a plate body annular groove (121) on its outer wall, and a plate body sealing ring (15) that can be elastically pressed against the flow channel valve seat is installed in the plate body annular groove (121).

7. The miniature dual-flow switch as described in claim 5, characterized in that: The piston (22) is provided with a protrusion (222) that can support the spindle (13).

8. The small dual-flow switcher as described in any one of claims 2 to 7, characterized in that: The flow control component (1) and the drive mechanism (2) are respectively disposed in the upper cover (3) and the housing (4).

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