Self-draining flow switcher

Abstract

A self-draining flow switcher, comprising valves, an upper cover, and a housing. The switcher is specially provided with a draining station, the draining station is provided with two valves, a draining branch pipe where one valve is located is used for drainage, and an air intake branch pipe where the other valve is located is used for air intake. Thus, icing inside the device can be effectively prevented.

Description

Self-draining flow switcher TECHNICAL FIELD

[0001] The utility model relates to the technical field of delivery device, particularly the technical field of flow switcher. BACKGROUND

[0002] Delivery device is a kind of device applied in washing machine or dish washer and other electrical washing equipment to automatically deliver detergent, softener or fungicide and other auxiliary agent, such as the invention disclosed in the washing agent delivery device assembly with the publication number CN110924080A and the invention disclosed in the liquid washing agent delivery device with the publication number CN102031675B;For delivery device, user needs to store the auxiliary agent to be delivered in the designated container in advance, and electrical washing equipment is then according to washing process to be flushed into them inside washing cylinder by water or other mechanical method.

[0003] Flow switcher with multiple water inlet channels is generally installed in delivery device;When such delivery device is used in whole machine, the inside of device can be waterlogged due to external water level higher than shell;At this time, once ambient temperature is lower (when storing or not using for a long time), the inside of device can be iced, to cause power mechanism to be unable to operate (i.e. function failure). UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems in prior art, and provides self-draining flow switcher, which can effectively avoid the icing phenomenon in the inside of device.

[0005] To achieve the above-mentioned purpose, the utility model provides self-draining flow switcher, including valve, upper cover and shell, switcher is specially provided with drainage station, the drainage station has two valves, one of the valve is located in drainage branch pipe for drainage, and the other valve is located in air inlet branch pipe for air inlet.

[0006] As preferred, the rear connecting pipe opening of the valve for drainage is lower than the rear connecting pipe opening of the valve for air inlet.

[0007] As preferred, the valve includes spring and driving mechanism, branch pipe valve seat is respectively arranged in the air inlet branch pipe and drainage branch pipe, the driving mechanism is located between spring and branch pipe valve seat and includes crankshaft and piston, the piston is sleeved outside the crankshaft and adjacent surfaces are provided with convex wall structure, the crankshaft can drive the piston to linearly slide along air inlet branch pipe or drainage branch pipe during rotation through convex wall structure.

[0008] As preferred, the crankshaft passes through the piston along the plug hole and is provided with shaft convex part at shaft wall, the inner wall of plug hole is provided with plug convex part that can be supported with shaft convex part, and the shaft convex part and plug convex part jointly constitute convex wall structure.

[0009] As preferred, the surface of the shaft convex part is further provided with a pit for the plug convex part to sink into.

[0010] As preferred, the side of the piston towards the spring is provided with a convex column for the spring to be sleeved.

[0011] As preferred, the side of the piston towards the spring is further provided with a slot for the spring to be inserted.

[0012] As preferred, the valve further comprises a plug body sealing ring, which is arranged on the side of the piston towards the branch valve seat.

[0013] As preferred, the side of the piston towards the branch valve seat is provided with a positioning column, and a column ring groove is arranged outside the positioning column, and the plug body sealing ring is installed in the column ring groove and can be elastically abutted against the branch valve seat.

[0014] The utility model has the advantages of:

[0015] 1) By installing the drainage station with two valves on the upper cover and communicating with the water inlet channel, when the water inlet branch pipe and the drainage branch pipe of the drainage station are opened at the same time, the water in the device can be drained through the drainage station for the next use, which effectively avoids the phenomenon of ice formation in the device, and fundamentally eliminates the problem of power mechanism failure.

[0016] 2) By arranging the shaft convex part with a pit on the shaft wall of the crankshaft, and arranging the plug convex part on the inner wall of the plug hole, the shaft convex part and the plug convex part jointly form a convex wall structure, so that the plug convex part can support different parts of the shaft convex part to enable the piston to stably linearly slide to the designated position along the water inlet branch pipe and the drainage branch pipe, and ensure the smooth opening and closing of the water inlet branch pipe or the drainage branch pipe.

[0017] 3) By arranging the convex column and the slot on one end of the piston respectively, the spring can be effectively prevented from falling off the piston, and the normal linkage between the spring and the piston is ensured, and the positioning column with the plug body sealing ring is installed on the other end of the piston, so that the plug body sealing ring can ensure the effective sealing of the water inlet branch pipe and the drainage branch pipe, and avoid the influence of the drainage station on the normal work of the water inlet channel.

[0018] The features and advantages of the utility model will be described in detail with reference to the embodiments and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a working schematic view of the flow switcher of the utility model for self-drainage;

[0020] Fig. 2 is an enlarged schematic view of P in Fig. 1;

[0021] Figure 3 is a structure schematic diagram of one perspective of the flow switcher of the utility model can self-drainage;

[0022] Figure 4 is the section view of A-A of figure 3;

[0023] Figure 5 is a structure schematic diagram of another perspective of the flow switcher of the utility model can self-drainage;

[0024] Figure 6 is the section view of B-B of figure 3.

[0025] In the figure: 1-spring, 2-driving mechanism, 21-crankshaft, 211-shaft convex part, 2111-pit, 22-piston, 221-plug convex part, 222-convex column, 223-insertion slot, 224-positioning column, 3-upper cover, 4-housing, 5-plug body sealing ring. DETAILED DESCRIPTION

[0026] Referring to figure 1 and figure 2, the flow switcher of the utility model can self-drainage, including valve, upper cover 3 and housing 4, switcher is specially provided with drainage station, the drainage station has two valves, one of the valve is in the drainage branch pipe for drainage, and the other valve is in the air inlet branch pipe for air inlet;In addition, the upper cover 3 and the housing 4 are provided with water inlet channel, and the drainage station is communicated with the water inlet channel.

[0027] The rear connecting pipe opening of the valve for drainage is lower than the rear connecting pipe opening of the valve for air inlet.

[0028] The valve includes spring 1 and driving mechanism 2, the air inlet branch pipe and the drainage branch pipe are respectively provided with branch pipe valve seat, the driving mechanism 2 is located between spring 1 and branch pipe valve seat and includes crankshaft 21 and piston 22, the piston 22 is sleeved outside the crankshaft 21, and the adjacent surfaces are provided with convex wall structure, the crankshaft 21 can drive the piston 22 to linearly slide along the air inlet branch pipe or the drainage branch pipe during rotation through the convex wall structure.

[0029] The crankshaft 21 passes through the piston 22 along the plug hole and is provided with shaft convex part 211 at the shaft wall, the inner wall of the plug hole is provided with plug convex part 221 that can support the shaft convex part 211, and the shaft convex part 211 and the plug convex part 221 jointly constitute the convex wall structure.

[0030] The surface of the shaft convex part 211 is also provided with pit 2111 that can sink the plug convex part 221.

[0031] The side of the piston 22 towards spring 1 is provided with convex column 222 that can be sleeved with spring 1.

[0032] The side of the piston 22 towards spring 1 is also provided with insertion slot 223 that can be inserted with spring 1.

[0033] The valve further comprises a plug sealing ring 5 arranged on the side of the piston 22 facing the branch valve seat.

[0034] The side of the piston 22 facing the branch valve seat is provided with a positioning column 224, and a column ring groove is arranged outside the positioning column 224, and the plug sealing ring 5 is arranged in the column ring groove and can be elastically abutted against the branch valve seat.

[0035] The utility model discloses a working process:

[0036] When the whole machine is used, the water level is usually higher than the shell 4 (the water level line is shown as a dotted line in Fig. 1), so that the internal water accumulation phenomenon of the device occurs; at this time, if the ambient temperature is low (when storing or not using for a long time), the inside of the shell 4 may freeze, and then the power mechanism similar to the crankshaft 21 cannot operate (i.e. function failure).

[0037] Therefore, the utility model adds a drainage station, so that the user can rotate the crankshaft 51 to cooperate with the spring 1 to control the height of the piston 52, so that the plug sealing ring 5 is away from or close to the branch valve seat, and finally realizes the opening or closing of the air inlet branch pipe and the drainage branch pipe; wherein, when the air inlet branch pipe and the drainage branch pipe are opened, on the one hand, the gas can enter smoothly to ensure the air pressure balance, and on the other hand, the accumulated water can be discharged smoothly; in addition, for the driving mechanism, the crankshaft 21 can be rotated to make the shaft convex part 211 with or without the concave part 2111 opposite the plug convex part 221; in addition, as shown in Figs. 3 to 6, the gas can enter along the M arrow direction, and the water can flow out along the N arrow direction.

[0038] The above examples are illustrative of the utility model and are not limiting of the utility model, and any simple transformation of the utility model belongs to the protection scope of the utility model.

Claims

A self-draining flow switch, characterized in that: Includes valves, top cover (3) and housing (4). The switch is specially equipped with a drainage station with two valves. One of the valves is located in a drainage branch pipe for drainage, while the other valve is located in an air intake branch pipe for air intake. The self-draining flow switch as described in claim 1 is characterized in that: The downstream pipe opening of the valve used for drainage is lower than the downstream pipe opening of the valve used for air intake. The self-draining flow switch as described in claim 1 is characterized in that: The valve includes a spring (1) and a drive mechanism (2). The intake branch pipe and the drain branch pipe are respectively provided with branch pipe valve seats. The drive mechanism (2) is located between the spring (1) and the branch pipe valve seat and includes a crankshaft (21) and a piston (22). The piston (22) is sleeved outside the crankshaft (21) and a convex wall structure is provided between adjacent surfaces. The crankshaft (21) can drive the piston (22) to slide linearly along the intake branch pipe or the drain branch pipe through the convex wall structure during rotation. The self-draining flow switch as described in claim 3 is 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. The self-draining flow switch as described in claim 4 is characterized in that: The surface of the shaft protrusion (211) is also provided with a recess (2111) into which the protrusion (221) can sink. The self-draining flow switch as described in claim 3 is characterized in that: The piston (22) has a protrusion (222) on the side facing the spring (1) that can be fitted onto the spring (1). The self-draining flow switch as described in claim 6 is characterized in that: The piston (22) is also provided with a slot (223) on the side facing the spring (1) into which the spring (1) can be inserted. The self-draining flow switch as described in claim 3 is characterized in that: The valve also includes a plug seal ring (5), which is disposed on the side of the piston (22) facing the branch valve seat. The self-draining flow switch as described in claim 8 is characterized in that: The piston (22) has a positioning post (224) on the side facing the branch valve seat. The positioning post (224) has a column ring groove outside. The plug sealing ring (5) is installed in the column ring groove and can be elastically pressed against the branch valve seat.

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