Water inlet three-way electromagnetic valve

Abstract

The utility model provides a water inlet three-way electromagnetic valve which comprises a first valve body, a second valve body and a connecting assembly, a water inlet is formed in the first valve body, and two water outlets are formed in the second valve body. The first valve body and the second valve body are independent of each other and are connected into a whole through a connecting assembly. According to the water inlet three-way electromagnetic valve, the first valve body used for being connected with the kitchen angle valve in the water inlet three-way electromagnetic valve is independent of the second valve body of the water inlet three-way electromagnetic valve, so that when the water inlet three-way electromagnetic valve is connected with the kitchen angle valve, only the first valve body and the kitchen angle valve need to be connected; the whole water inlet three-way electromagnetic valve does not need to be directly connected with the kitchen angle valve, so that the size of the water inlet three-way electromagnetic valve in connection with the kitchen angle valve is reduced, the possibility of interference between the first valve main body and other devices around the kitchen angle valve is reduced, the installation difficulty of the water inlet three-way electromagnetic valve and the kitchen angle valve is reduced, and the connection effect and precision of the two are improved; and water leakage at the joint is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of valve bodies, in particular to a water inlet three-way solenoid valve. Background Art

[0002] Nowadays, water pollution is becoming more and more serious, and the problem of urban water safety is prominent. In response to the secondary pollution of tap water and the harmful substances in tap water caused by raw water pollution, more and more water purification devices are being used. Water purification devices generally have multi-stage filtration functions: the first stage of coarse filtration basically uses PP cotton, which is mainly used to filter impurities, sediment and suspended matter in the water; then activated carbon, which mainly removes and decomposes organic harmful substances and discoloration and odor in the water; finally, the permeable membrane, whose function is to filter bacteria, calcium and magnesium ions, heavy metals, etc. Most of the existing water purification devices use solenoid valves to control the on and off of the water flow in the device, and the solenoid valves are generally installed after the pp cotton filter structure and the activated carbon filter structure to control the water flow into the final permeable membrane filter structure. However, the layout of this solenoid valve may cause water leakage in the water purification device, affecting the user's use.

[0003] To this end, the technicians thought of installing a three-way solenoid valve directly at the kitchen angle valve. The water inlet of the three-way solenoid valve is connected to the kitchen angle valve, and the two water outlets of the three-way solenoid valve are respectively connected to conventional water-using equipment (such as faucets, etc.) and the water inlet of the water purification device, thereby achieving zero water leakage of the water purification device.

[0004] The three-way solenoid valve in the prior art is an integrated structure, and the three-way solenoid valve can only be connected to the kitchen angle valve as a whole. However, since the kitchen angle valve is usually blocked by the sink, garbage disposal, small kitchen appliance, etc., it provides a difficult installation environment for the three-way solenoid valve. Technicians can often only perform blind installation, resulting in poor connection between the three-way solenoid valve and the kitchen angle valve, resulting in water leakage. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a water inlet three-way solenoid valve in order to overcome the defect that the integrated three-way solenoid valve and the kitchen angle valve in the prior art are difficult to install, resulting in water leakage at the connection between the two.

[0006] The utility model solves the above technical problems through the following technical solutions:

[0007] A water inlet three-way solenoid valve, comprising a first valve body, a second valve body and a connecting assembly, wherein the first valve body is provided with a water inlet, and the second valve body is provided with two water outlets;

[0008] The first valve body and the second valve body are independent of each other and are connected into a whole through the connecting assembly.

[0009] In this solution, the first valve body of the water inlet three-way solenoid valve used for connecting with the kitchen angle valve is set independently from the other part of the water inlet three-way solenoid valve (the second valve body), so that when the water inlet three-way solenoid valve is connected to the kitchen angle valve, it is only necessary to connect the first valve body and the kitchen angle valve, and there is no need to directly connect the entire water inlet three-way solenoid valve to the kitchen angle valve, which reduces the size of the water inlet three-way solenoid valve when connected to the kitchen angle valve, reduces the possibility of interference between the first valve body and other devices around the kitchen angle valve, reduces the difficulty of installing the water inlet three-way solenoid valve and the kitchen angle valve, improves the connection effect and accuracy of the water inlet three-way solenoid valve and the kitchen angle valve, and effectively avoids water leakage at the connection between the two. After the first valve body and the kitchen angle valve are connected, the connection between the first valve body and the second valve body is realized through the connecting component to realize the overall assembly of the water inlet three-way solenoid valve.

[0010] Preferably, the first valve body comprises a water inlet interface and an extension portion, the extension portion is connected to the water inlet interface, the water inlet is provided in the water inlet, the extension portion is provided in the first flow channel, and the first flow channel is communicated with the water inlet;

[0011] A second flow channel is provided in the second valve body, and the second flow channel can be communicated with the two water outlets. The extension portion is inserted into the second flow channel, and the first flow channel is communicated with the second flow channel.

[0012] In this solution, the extension portion cooperates with the second flow channel to ensure the coaxiality of the first flow channel and the second flow channel, thereby ensuring the coaxiality of the kitchen angle valve and the second valve body, and further preventing water leakage from the water inlet three-way solenoid valve.

[0013] Preferably, a first step portion is provided on the hole wall of the second flow channel, and an end of the extension portion away from the water inlet interface abuts against a first step surface of the first step portion.

[0014] In this solution, the above arrangement can realize the rapid positioning and installation of the first valve body and the second valve body, thereby improving the assembly efficiency of the two. Moreover, the first step portion can limit the movement of the first valve body in a direction away from the kitchen angle valve, thereby ensuring the reliability of the connection between the first valve body and the kitchen angle valve.

[0015] Preferably, the connecting assembly includes a first connecting member and a second connecting member, the first connecting member and the second connecting member are both annular, the first connecting member is sleeved on the outer circumferential surface of the extending portion, and the second connecting member is arranged in the second flow channel and connected to the hole wall of the second flow channel;

[0016] The second connecting member is sleeved on the outer peripheral side of the first connecting member, and the outer peripheral wall of the first connecting member is snap-fitted and connected with the inner peripheral wall of the second connecting member.

[0017] In this solution, the snap-fit ​​connection method can achieve quick connection between the first valve body and the second valve body, and the installation method is simple and does not require complicated operations. During the connection process, the first valve body and the second valve body are not prone to relative movement, thereby improving the connection effect and accuracy between the two and preventing water leakage at the connection between the first valve body and the second valve body.

[0018] Preferably, a second step portion is provided on the hole wall of the second flow channel, and an end of the second connecting member away from the water inlet interface abuts against a second step surface of the second step portion.

[0019] In this solution, the above arrangement can realize the rapid positioning and installation of the second connecting member and the second valve body, thereby improving the assembly efficiency of the two. Moreover, the second step portion can limit the movement of the second connecting member in a direction away from the water inlet interface of the first valve body, thereby ensuring the reliability of the connection between the second connecting member and the second valve body.

[0020] Preferably, the connection assembly further comprises a third connection piece, the outer peripheral surface of the third connection piece is fixed on the hole wall of the second flow channel, the third connection piece is sleeved on the outer peripheral side of the second connection piece and is provided with an internal thread, the outer peripheral surface of the second connection piece is provided with an external thread, and the second connection piece is threadedly connected to the third connection piece.

[0021] In this solution, the threaded connection has high connection strength and a simple connection method.

[0022] Preferably, the first connecting member comprises a connecting portion and a plurality of spring sheets, the plurality of spring sheets are arranged at intervals along the circumference of the second flow channel, the ends of the plurality of spring sheets facing the water inlet interface are connected to each other through the connecting portion, and the ends of the plurality of spring sheets away from the water inlet interface can move radially along the second flow channel;

[0023] The outer circumferential surface of one end of the spring piece away from the water inlet interface protrudes outward to form a first protrusion, and the inner circumferential surface of one end of the second connecting member close to the water inlet interface protrudes inward to form a second protrusion, the first protrusion is located on the side of the second protrusion away from the water inlet interface, and the projection of the first protrusion on the second connecting member along the axial direction of the second flow channel at least partially overlaps with the second protrusion.

[0024] In this solution, when the first connecting member is inserted into the second connecting member, the spring sheet is pressed and moves radially inwardly of the first connecting member until the first protrusion passes through the second protrusion and the spring sheet is reset. The cooperation between the first protrusion and the second protrusion limits the movement of the first valve body toward the direction close to the kitchen angle valve, thereby ensuring the reliability of the connection between the first valve body and the kitchen angle valve.

[0025] Preferably, the second valve body has a connecting section for connecting with the first valve body, the connecting section is located at one end of the second valve body facing the first valve body, and the second flow channel runs through the connecting section to form an opening for the extension portion to be inserted;

[0026] The connecting assembly also includes a fourth connecting piece, which is annular and sleeved on the outer circumferential surface of the connecting section. The fourth connecting piece includes an abutment portion arranged between the first connecting piece and the water inlet interface, and the abutment portion abuts against the first connecting piece and the water inlet interface at two ends in the axial direction of the second flow channel, respectively.

[0027] In this solution, the fourth connecting member is used to further ensure the coaxiality of the first valve body and the second valve body, thereby ensuring the coaxiality of the kitchen angle valve and the second valve body, and further preventing water from entering the three-way solenoid valve.

[0028] Preferably, a gap is provided between the connecting portion and the second connecting piece in the axial direction of the second flow channel, and the connecting assembly further comprises a buckle, which is clamped in the gap, and the two ends of the buckle in the axial direction of the second flow channel are respectively in contact with the connecting portion and the second connecting piece.

[0029] In this solution, the buckle is used to compress the second connecting member to prevent the second connecting member from moving with the first valve body toward the direction close to the kitchen angle valve, thereby improving the reliability of the snap connection between the first connecting member and the second connecting member.

[0030] Preferably, the buckle comprises a buckle body and a pull ring which are connected to each other, and the pull ring is arranged on the outer peripheral side of the buckle body and at least partially arranged in the external space of the water inlet three-way solenoid valve.

[0031] In this solution, technicians can disassemble the buckle through the pull ring to facilitate subsequent maintenance.

[0032] The positive progressive effect of the utility model is that the first valve body used for connecting with the kitchen angle valve in the water inlet three-way solenoid valve is set independently from the other part (the second valve body) of the water inlet three-way solenoid valve, so that when the water inlet three-way solenoid valve is connected with the kitchen angle valve, it is only necessary to connect the first valve body and the kitchen angle valve, and it is not necessary to directly connect the entire water inlet three-way solenoid valve with the kitchen angle valve, which reduces the size of the water inlet three-way solenoid valve when connected with the kitchen angle valve, reduces the possibility of interference with other devices around the first valve body and the kitchen angle valve, reduces the difficulty of installing the water inlet three-way solenoid valve and the kitchen angle valve, improves the connection effect and accuracy of the water inlet three-way solenoid valve and the kitchen angle valve, and effectively avoids water leakage at the connection between the two. After the first valve body and the kitchen angle valve are connected, the connection between the first valve body and the second valve body is realized through the connecting component, and the overall assembly of the water inlet three-way solenoid valve is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional structural schematic diagram of the water inlet three-way solenoid valve of Example 1 of the utility model.

[0034] Figure 2 This is a side structural schematic diagram of the water inlet three-way solenoid valve of Example 1 of the utility model.

[0035] Figure 3 This is a schematic diagram of the internal structure of the water inlet three-way solenoid valve in Example 1 of the utility model.

[0036] Figure 4 for Figure 3 Enlarged view of part A.

[0037] Figure 5 This is a schematic diagram of the three-dimensional structure of the first connecting member of Example 1 of the utility model.

[0038] Figure 6 It is a schematic diagram of the three-dimensional structure of the water inlet three-way solenoid valve of Example 2 of the utility model.

[0039] Description of reference numerals:

[0040] First valve body 1

[0041] Water inlet interface 11

[0042] Water Inlet 111

[0043] Extension 12

[0044] First flow channel 13

[0045] Second valve body 2

[0046] Connection section 21

[0047] First water outlet 22

[0048] Second water outlet 23

[0049] Second flow channel 24

[0050] First step portion 25

[0051] First step surface 251

[0052] Second step portion 26

[0053] Second step surface 261

[0054] First connecting piece 3

[0055] Connecting part 31

[0056] Shrapnel 32

[0057] The first protrusion 33

[0058] Second connecting piece 4

[0059] The second protrusion 41

[0060] The third connecting piece 5

[0061] Fourth connecting member 6

[0062] Contact portion 61

[0063] Gap 62

[0064] Buckle 7

[0065] Buckle body 71

[0066] Pull ring 72 DETAILED DESCRIPTION

[0067] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0068] Example 1

[0069] like Figure 1-Figure 3 As shown, this embodiment discloses a water inlet three-way solenoid valve, including a first valve body 1, a second valve body 2 and a connecting assembly. The first valve body 1 and the second valve body 2 are independent of each other and are connected into a whole through the connecting assembly.

[0070] like Figure 1-Figure 4 As shown, the first valve body 1 includes a water inlet interface 11 and an extension portion 12, one end of the water inlet interface 11 is connected to the kitchen angle valve, and the other end of the water inlet interface 11 is connected to the extension portion 12. A water inlet 111 is provided in the water inlet interface 11, and a first flow channel 13 is provided in the extension portion 12. The first flow channel 13 is connected to the water inlet 111. After the kitchen angle valve discharges water, it flows into the first flow channel 13 through the water inlet 111, and then flows to the interior of the second valve body 2 through the first flow channel 13.

[0071] like Figure 1-Figure 4As shown, the second valve body 2 has a connecting section 21 for connecting with the first valve body 1, and the connecting section 21 is located at one end of the second valve body 2 facing the water inlet interface 11 of the first valve body 1. The second valve body 2 includes two water outlets, namely a first water outlet 22 and a second water outlet 23. The first water outlet 22 is connected and communicated with a conventional water-using device (such as a faucet, etc.), and the second water outlet 23 is connected and communicated with the water inlet 111 of the water purification device. A second flow channel 24 is provided inside the second valve body 2, and the second flow channel 24 runs through the connecting section 21 to form an opening for the extension part 12 to be inserted, and the extension part 12 is inserted into the second flow channel 24 from the opening. In this embodiment, the coaxiality of the first flow channel 13 and the second flow channel 24 is ensured by the cooperation of the extension part 12 and the second flow channel 24, thereby ensuring the coaxiality of the kitchen angle valve and the second valve body 2, and further preventing the water inlet three-way solenoid valve from leaking.

[0072] Furthermore, if Figure 3 As shown, a first step portion 25 is provided on the hole wall of the second flow channel 24, and one end of the extension portion 12 away from the water inlet interface 11 abuts against a first step surface 251 of the first step portion 25, thereby realizing rapid positioning and installation of the first valve body 1 and the second valve body 2, and improving the assembly efficiency of the two. Moreover, the first step portion 25 can limit the movement of the first valve body 1 in a direction away from the kitchen angle valve, thereby ensuring the reliability of the connection between the first valve body 1 and the kitchen angle valve.

[0073] like Figure 3 and Figure 4 As shown, the first flow channel 13 is connected to the second flow channel 24, and the second flow channel 24 can be connected to two water outlets, so that the water in the first flow channel 13 can flow to the two water outlets through the second flow channel 24 to supply water to the corresponding water-using equipment. Among them, the solenoid valve is used to control whether the second flow channel 24 is connected to the second water outlet 23. When the water purification device is not in use, the solenoid valve is normally closed, and the second flow channel 24 is not connected to the second water outlet 23 to prevent the water purification device from leaking. When the water purification device is in use, the solenoid valve is opened, and the second flow channel 24 is connected to the second water outlet 23 to realize water outlet of the water purification device.

[0074] In this embodiment, the first valve body 1 in the water inlet three-way solenoid valve used for connecting with the kitchen angle valve is set independently from the other part of the water inlet three-way solenoid valve (the second valve body 2), so that when the water inlet three-way solenoid valve is connected to the kitchen angle valve, it is only necessary to connect the first valve body 1 and the kitchen angle valve, and it is not necessary to directly connect the entire water inlet three-way solenoid valve to the kitchen angle valve, which reduces the size of the water inlet three-way solenoid valve when connected to the kitchen angle valve, reduces the possibility of interference between the first valve body 1 and other devices around the kitchen angle valve, reduces the difficulty of installing the water inlet three-way solenoid valve and the kitchen angle valve, improves the connection effect and accuracy of the water inlet three-way solenoid valve and the kitchen angle valve, and effectively avoids water leakage at the connection between the two. After the first valve body 1 and the kitchen angle valve are connected, the connection between the first valve body 1 and the second valve body 2 is realized through the connecting component to realize the assembly of the water inlet three-way solenoid valve as a whole.

[0075] like Figure 3 and Figure 4 As shown, the connection assembly includes a first connection member 3 , a second connection member 4 , a third connection member 5 , a fourth connection member 6 and a buckle 7 .

[0076] like Figure 4 As shown, the second connector 4 and the third connector 5 are both annular and are both arranged inside the second flow channel 24. The second connector 4 and the third connector 5 are both connected to the hole wall of the second flow channel 24. Specifically, the outer peripheral surface of the third connector 5 is fixed on the hole wall of the second flow channel 24, and the inner peripheral surface of the third connector 5 is provided with an internal thread. The third connector 5 is sleeved on the outer peripheral side of the second connector 4, and the outer peripheral surface of the second connector 4 is provided with an external thread. The second connector 4 is threadedly connected to the third connector 5, thereby realizing the connection between the second connector 4 and the second valve body 2. The threaded connection has high connection strength and a simple connection method, which ensures the stability of the connection between the second connector 4 and the third connector 5.

[0077] Furthermore, a second step portion 26 is provided on the hole wall of the second flow channel 24, and the ends of the second connector 4 and the third connector 5 away from the water inlet interface 11 are both in contact with the second step surface 261 of the second step portion 26, thereby realizing the rapid positioning and installation of the second connector 4, the third connector 5 and the second valve body 2, and improving the assembly efficiency. Moreover, the second step portion 26 can limit the movement of the second connector 4 and the third connector 5 in the direction away from the water inlet interface 11 of the first valve body 1, thereby ensuring the reliability of the connection between the second connector 4, the third connector 5 and the second valve body 2.

[0078] like Figure 4 As shown, the inner circumference of one end of the second connecting member 4 close to the water inlet interface 11 protrudes inward to form a second protrusion 41.

[0079] like Figure 3-Figure 5As shown, the first connecting member 3 is annular and sleeved on the outer circumferential surface of the extension portion 12, and the second connecting member 4 is sleeved on the outer circumferential side of the first connecting member 3. The first connecting member 3 includes a connecting portion 31 and a plurality of spring pieces 32, and the plurality of spring pieces 32 are arranged at intervals along the circumference of the second flow channel 24. The plurality of spring pieces 32 are connected to each other through the connecting portion 31 at one end facing the water inlet interface 11, and the plurality of spring pieces 32 at one end away from the water inlet interface 11 can move radially along the second flow channel 24. The outer circumferential surface of the end of the spring piece 32 away from the water inlet interface 11 protrudes outward to form a first protrusion 33. The first protrusion 33 is located on the side of the second protrusion 41 away from the water inlet interface 11, and the projection of the first protrusion 33 on the second connecting member 4 along the axial direction of the second flow channel 24 at least partially overlaps with the second protrusion 41. The outer circumferential wall of the first connecting member 3 and the inner circumferential wall of the second connecting member 4 are connected by the first protrusion 33 and the second protrusion 41.

[0080] Specifically, when the first connector 3 is inserted into the second connector 4, the spring sheet 32 ​​is pressed to move radially inwardly of the first connector 3 until the first protrusion 33 passes through the second protrusion 41 and the spring sheet 32 ​​is reset. The first protrusion 33 and the second protrusion 41 are matched to limit the movement of the first valve body 1 toward the kitchen angle valve, thereby ensuring the reliability of the connection between the first valve body 1 and the kitchen angle valve. The snap-fit ​​connection method can realize the quick connection between the first valve body 1 and the second valve body 2, and the installation method is simple and does not require complicated operations. During the connection process, the first valve body 1 and the second valve body 2 are not easy to move relative to each other, thereby improving the connection effect and accuracy between the two and preventing water leakage at the connection between the first valve body 1 and the second valve body 2.

[0081] like Figure 4 As shown, a gap is provided between the connecting portion 31 of the first connecting member 3 and the second connecting member 4 in the axial direction of the second flow channel 24, and the buckle 7 is clamped in the gap. The two ends of the buckle 7 in the axial direction of the second flow channel 24 are respectively abutted against the connecting portion 31 and the second connecting member 4 to press the second connecting member 4 to prevent the second connecting member 4 from following the first valve body 1 and moving toward the direction close to the kitchen angle valve, thereby improving the reliability of the clamping connection between the first connecting member 3 and the second connecting member 4.

[0082] like Figure 3-Figure 5As shown, the fourth connecting member 6 is annular and is arranged outside the second valve body 2, one end of the fourth connecting member 6 is sleeved on the outer peripheral surface of the connecting section 21, and the other end of the fourth connecting member 6 is sleeved on the outer peripheral surface of the extension portion 12 and abuts against one end surface of the water inlet interface 11 facing the extension portion 12. Specifically, the fourth connecting member 6 includes an abutting portion 61 arranged between the first connecting member 3 and the water inlet interface 11, and the two ends of the abutting portion 61 in the axial direction of the second flow channel 24 are respectively abutted against the first connecting member 3 and the water inlet interface 11, so as to further ensure the coaxiality of the first valve body 1 and the second valve body 2, thereby ensuring the coaxiality of the kitchen angle valve and the second valve body 2, and further preventing the water inlet three-way solenoid valve.

[0083] In this embodiment, the first connecting member 3 and the fourth connecting member 6 are integral structures. In other alternative implementations, the first connecting member 3 and the fourth connecting member 6 may also be split structures.

[0084] The buckle 7 and the fourth connecting member 6 in this embodiment are not removable after installation, and the water leakage prevention effect is better. In other alternative embodiments, the buckle 7 and the fourth connecting member 6 can also be designed to be removable after installation to facilitate later maintenance.

[0085] Example 2

[0086] The water inlet three-way solenoid valve in this embodiment is basically the same as that in Embodiment 1, except that the buckle 7 and the fourth connecting member 6 in this embodiment can be disassembled after installation.

[0087] like Figure 6 As shown, the buckle 7 includes a buckle body 71 and a pull ring 72 connected to each other, and the pull ring 72 is arranged on the outer peripheral side of the buckle body 71 and at least partially arranged in the external space of the water inlet three-way solenoid valve. The technician can disassemble the buckle 7 through the pull ring 72 to facilitate subsequent maintenance.

[0088] like Figure 6 As shown, a notch 62 is provided on the peripheral side wall of the fourth connecting member 6, and the notch 62 passes through both ends of the second flow channel 24 in the radial direction, and the notch 62 passes through the peripheral side wall of the fourth connecting member 6 at one end of the second flow channel 24 in the axial direction away from the water inlet interface 11, thereby realizing that the fourth connecting member 6 can be disassembled after installation.

[0089] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship of the device or component shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0090] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A water inlet three-way solenoid valve, characterized in that: The water inlet three-way solenoid valve comprises a first valve body, a second valve body and a connecting assembly, the first valve body is provided with a water inlet, and the second valve body is provided with two water outlets; The first valve body and the second valve body are independent of each other and are connected into a whole through the connecting assembly.

2. The water inlet three-way solenoid valve according to claim 1, characterized in that: The first valve body comprises a water inlet interface and an extension portion, wherein the extension portion is connected to the water inlet interface, the water inlet is provided in the water inlet, and a first flow channel is provided in the extension portion, and the first flow channel is communicated with the water inlet; A second flow channel is provided in the second valve body, and the second flow channel can be communicated with the two water outlets. The extension portion is inserted into the second flow channel, and the first flow channel is communicated with the second flow channel.

3. The water inlet three-way solenoid valve according to claim 2, characterized in that: A first step portion is provided on the hole wall of the second flow channel, and one end of the extension portion away from the water inlet interface abuts against a first step surface of the first step portion.

4. The water inlet three-way solenoid valve according to claim 2, characterized in that: The connecting assembly includes a first connecting member and a second connecting member, both of which are annular, the first connecting member is sleeved on the outer circumferential surface of the extending portion, and the second connecting member is arranged in the second flow channel and connected to the hole wall of the second flow channel; The second connecting member is sleeved on the outer peripheral side of the first connecting member, and the outer peripheral wall of the first connecting member is snap-fitted and connected with the inner peripheral wall of the second connecting member.

5. The water inlet three-way solenoid valve according to claim 4, characterized in that: A second step portion is provided on the hole wall of the second flow channel, and one end of the second connecting member away from the water inlet interface abuts against a second step surface of the second step portion.

6. The water inlet three-way solenoid valve according to claim 5, characterized in that: The connecting assembly also includes a third connecting piece, the outer peripheral surface of the third connecting piece is fixed on the hole wall of the second flow channel, the third connecting piece is sleeved on the outer peripheral side of the second connecting piece and is provided with an internal thread, the outer peripheral surface of the second connecting piece is provided with an external thread, and the second connecting piece is threadedly connected to the third connecting piece.

7. The water inlet three-way solenoid valve according to claim 5, characterized in that: The first connecting member includes a connecting portion and a plurality of spring sheets, wherein the plurality of spring sheets are arranged at intervals along the circumference of the second flow channel, and the ends of the plurality of spring sheets facing the water inlet interface are connected to each other through the connecting portion, and the ends of the plurality of spring sheets away from the water inlet interface can move radially along the second flow channel; The outer circumferential surface of one end of the spring piece away from the water inlet interface protrudes outward to form a first protrusion, and the inner circumferential surface of one end of the second connecting member close to the water inlet interface protrudes inward to form a second protrusion, the first protrusion is located on the side of the second protrusion away from the water inlet interface, and the projection of the first protrusion on the second connecting member along the axial direction of the second flow channel at least partially overlaps with the second protrusion.

8. The water inlet three-way solenoid valve according to claim 7, characterized in that: The second valve body has a connecting section for connecting with the first valve body, the connecting section is located at one end of the second valve body facing the first valve body, and the second flow channel runs through the connecting section to form an opening for the extension portion to be inserted; The connecting assembly also includes a fourth connecting piece, which is annular and sleeved on the outer circumferential surface of the connecting section. The fourth connecting piece includes an abutment portion arranged between the first connecting piece and the water inlet interface, and the abutment portion abuts against the first connecting piece and the water inlet interface at two ends in the axial direction of the second flow channel, respectively.

9. The water inlet three-way solenoid valve according to claim 7, characterized in that: A gap is provided between the connecting portion and the second connecting member in the axial direction of the second flow channel, and the connecting assembly further comprises a buckle, which is clamped in the gap, and the two ends of the buckle in the axial direction of the second flow channel are respectively in contact with the connecting portion and the second connecting member.

10. The water inlet three-way solenoid valve according to claim 9, characterized in that: The buckle comprises a buckle body and a pull ring which are connected to each other. The pull ring is arranged on the outer peripheral side of the buckle body and at least partially arranged in the external space of the water inlet three-way solenoid valve.

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