Water inlet valve

Abstract

The utility model relates to the technical field of water inlet valves, in particular to a water inlet valve. The water inlet valve comprises a water supplementing valve body and a water inlet valve body, a water inlet channel, a flow limiting channel, a confluence channel and a water outlet channel which are sequentially communicated are arranged in the water inlet valve body, and the area of the cross section of the flow limiting channel is minimum. The water replenishing valve body is installed on the water inlet valve body, a first water replenishing channel and a second water replenishing channel are arranged in the water replenishing valve body, one end of the first water replenishing channel is communicated with the water inlet channel, one end of the second water replenishing channel is communicated with the confluence channel, and the other end of the first water replenishing channel is selectively communicated with or separated from the other end of the second water replenishing channel. The flow limiting channel with the smallest cross section area is arranged in the water inlet valve body, and meanwhile the first water supplementing channel and the second water supplementing channel are separated, so that small-flow water supply of the water inlet valve is achieved. When the first water supplementing channel is communicated with the second water supplementing channel, large-flow water supply of the water inlet valve is achieved, and therefore water quantity adjustment of the water inlet valve is achieved, and the water using requirement at the high temperature in summer is met.

Description

Technical Field

[0001] The utility model relates to the technical field of water inlet valves, in particular to a water inlet valve. Background Technique

[0002] In the water circuit system of a wall-mounted boiler, the flow rate at the water inlet end is usually set according to the power of the burner of the wall-mounted boiler. The greater the power of the burner, that is, the more water that can be heated per unit time, the greater the amount of water allowed to enter the water inlet end. To ensure the timely and rapid supply of hot water, a flow limiting ring is installed in the water inlet valve in the water circuit system to limit the maximum water inlet flow rate at the water inlet end, so as to ensure that the wall-mounted boiler can provide hot water in a timely and rapid manner under the rated power.

[0003] In different water usage situations, for example, in summer, the external ambient temperature is relatively high, and the water temperature entering the wall-mounted boiler is also relatively high (closer to the rated temperature at the water outlet end), so that the amount of water that the wall-mounted boiler can heat to the rated temperature per unit time under the same power will increase. However, due to the flow limitation of the flow limiting ring, it is impossible to supplement enough water into the wall-mounted boiler in time. When the switches of multiple water outlet ends are opened at the same time, the water flow at each water outlet end will become abnormally small, making it difficult to meet the water usage requirements in summer when the temperature is high. Content of the Utility Model

[0004] The purpose of the utility model is to provide a water inlet valve to realize the water volume adjustment of the water inlet valve and meet the water usage requirements in summer when the temperature is high.

[0005] To achieve this purpose, the technical solution adopted by the utility model is as follows:

[0006] The water inlet valve includes a water replenishing valve body and a water inlet valve body. An inlet channel, a flow limiting channel, a confluence channel and an outlet channel are sequentially communicated in the water inlet valve body, and the cross-sectional area of the flow limiting channel is the smallest;

[0007] The water replenishing valve body is installed on the water inlet valve body. A first water replenishing channel and a second water replenishing channel are arranged in the water replenishing valve body. One end of the first water replenishing channel is communicated with the inlet channel, one end of the second water replenishing channel is communicated with the confluence channel, and the other end of the first water replenishing channel is selectively communicated with or blocked from the other end of the second water replenishing channel.

[0008] As an optional scheme of the water inlet valve, the inlet channel, the flow limiting channel and the confluence channel all extend along the length direction of the water inlet valve body, and both ends of the flow limiting channel are directly communicated with the inlet channel and the confluence channel respectively.

[0009] As an optional scheme of the water inlet valve, a process hole is opened at one end of the water inlet valve body along the length direction, and the process hole is blocked with a plug. The end of the confluence channel far from the flow limiting channel is directly communicated with the process hole.

[0010] As an alternative to the inlet valve, a first communication cavity and a second communication cavity are further provided inside the inlet valve body. The inner wall of the first communication cavity is smoothly and transitionally connected to the inner wall of the water inlet passage. One end of the water inlet passage, the first communication cavity, and the first water replenishing passage are sequentially communicated. The inner wall of the second communication cavity is smoothly and transitionally connected to the inner wall of the confluence passage. One end of the second water replenishing passage, the second communication cavity, and the confluence passage are sequentially communicated.

[0011] As an alternative to the inlet valve, the sum of the cross-sectional areas of the first water replenishing passage and the current-limiting passage is equal to the cross-sectional area of the water inlet passage.

[0012] As an alternative to the inlet valve, the cross-sectional area of the water inlet passage is greater than or equal to the cross-sectional area of the confluence passage.

[0013] As an alternative to the inlet valve, an impeller assembly is provided between the confluence passage and the water outlet passage.

[0014] As an alternative to the inlet valve, the other end of the inlet valve body in the length direction has a water inlet joint. A water inlet communicating with the water inlet passage is provided inside the water inlet joint, and the cross-sectional area of the water inlet is greater than or equal to the cross-sectional area of the water inlet passage.

[0015] As an alternative to the inlet valve, the inlet valve further includes an electromagnetic switch, which is installed between the first water replenishing passage and the second water replenishing passage to connect or cut off the first water replenishing passage and the second water replenishing passage.

[0016] As an alternative to the inlet valve, a communicating pipe with an opening at the top is provided inside the water replenishing valve body. A communicating channel is provided inside the communicating pipe, a cavity is provided outside the communicating pipe, the first water replenishing passage is communicated with the cavity, the communicating channel is communicated with the second water replenishing passage, and the cavity and the communicating channel are connected or cut off by the electromagnetic switch.

[0017] The beneficial effects of the present utility model are as follows:

[0018] The water inlet valve proposed by the utility model sets a flow-limiting channel with the smallest cross-sectional area in the water inlet valve body to limit the maximum water inlet flow of the water inlet valve, and at the same time, the first water replenishment channel is separated from the second water replenishment channel to realize the small flow water supply of the water inlet valve through the flow-limiting channel. When the water consumption increases in summer with high temperature, the first water replenishment channel is connected with the second water replenishment channel, and the water flow in the water inlet channel that is limited by the flow-limiting channel flows into the confluence channel through the second water replenishment channel and merges with the water flow flowing into the confluence channel from the flow-limiting channel to increase the water volume in the confluence channel, realize the large flow water supply of the water inlet valve, and thus realize the water volume regulation of the water inlet valve to meet the water demand in summer with high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a water inlet valve provided by an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a water inlet valve provided by an embodiment of the utility model when supplying water at a small flow rate;

[0021] Figure 3 is a cross-sectional view of a water inlet valve body provided by an embodiment of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a water inlet valve body provided by an embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of a water inlet valve provided by an embodiment of the utility model when supplying water at a large flow rate;

[0024] Figure 6 is a cross-sectional view of an elastic diaphragm provided in an embodiment of the utility model;

[0025] Figure 7 It is a cross-sectional view of a sealing seat provided in an embodiment of the utility model.

[0026] The names and numbers of the components in the figure are as follows:

[0027] 1. Water replenishment valve body; 11. Water replenishment pipe; 111. First water replenishment channel; 112. Third water replenishment channel; 12. Water replenishment regulating pipe; 120. Second water replenishment channel; 13. Connecting pipe; 131. Connecting channel; 132. Cavity; 2. Water replenishment switch; 3. Solenoid switch; 31. Solenoid valve; 311. Valve seat; 312. Valve core; 313. Spring; 32. Elastic diaphragm; 321. Mounting hole; 33. Sealing seat; 330. Card slot; 331. Seat body; 332. First column; 3320. Sealing hole; 333. Second column; 3330. Air inlet hole;

[0028] 4. Water inlet valve body; 41. Water inlet joint; 411. Water inlet; 410. Water inlet channel; 42. Confluence channel; 43. Flow limiting channel; 44. Process hole; 45. Plug; 46. First communication cavity; 47. Second communication cavity; 48. Make-up water joint; 49. Water outlet joint; 5. Impeller assembly. Detailed implementation manners

[0029] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and through specific implementation manners. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all of them.

[0030] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top", and "on the top" of the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom", and "under the bottom" of the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0032] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", and "left" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0033] The technical solutions of the present utility model will be further described below with reference to the drawings and through specific implementation manners.

[0034] As Figure 1 and Figure 2 shown, this embodiment provides a water inlet valve, which includes a water inlet valve body 4 and a water replenishing valve body 1 installed on the water inlet valve body 4. The water inlet valve is mainly installed in the water circuit system of the wall-mounted boiler to supply water to the external circulating water circuit and replenish water to the internal circulating water circuit through the water replenishing valve body 1 at the same time.

[0035] In the existing water inlet valve, a flow-limiting ring is installed to limit the maximum water inlet flow at the water inlet end, so as to ensure that the wall-mounted boiler can provide hot water in time and quickly under the rated power. In different water usage situations, for example, in summer, the external ambient temperature is relatively high, and the water temperature entering the wall-mounted boiler is also relatively high, so that the amount of water that the wall-mounted boiler can heat to the rated temperature per unit time under the same power will increase. However, due to the flow limitation of the flow-limiting ring, it is impossible to replenish enough water into the wall-mounted boiler in time. When the switches of multiple water outlet ends are opened at the same time, the water flow at each water outlet end will become abnormally small, making it difficult to meet the water usage requirements in summer with high temperature.

[0036] To solve the above problems, as Figure 2 and Figure 3 shown, a water inlet channel 410, a flow-limiting channel 43, a confluence channel 42 and a water outlet channel that are connected in sequence are provided in the water inlet valve body 4, and the cross-sectional area of the flow-limiting channel 43 is the smallest. A first water replenishing channel 111 and a second water replenishing channel 120 are also provided in the water replenishing valve body 1. One end of the first water replenishing channel 111 is connected to the water inlet channel 410, and one end of the second water replenishing channel 120 is connected to the confluence channel 42. The other end of the first water replenishing channel 111 and the other end of the second water replenishing channel 120 are selectively connected or disconnected. By providing the flow-limiting channel 43 with the smallest cross-sectional area in the water inlet valve body 4 to limit the maximum water inlet flow of the water inlet valve, and at the same time, the first water replenishing channel 111 and the second water replenishing channel 120 are disconnected to realize the small-flow water supply of the water inlet valve through the flow-limiting channel 43. When the water usage amount increases in summer with high temperature, the first water replenishing channel 111 and the second water replenishing channel 120 are connected, and the water flow restricted by the flow-limiting channel 43 in the water inlet channel 410 flows into the confluence channel 42 through the second water replenishing channel 120 and converges with the water flow flowing into the confluence channel 42 from the flow-limiting channel 43 to increase the water volume in the confluence channel 42, realizing the large-flow water supply of the water inlet valve, thus realizing the water volume adjustment of the water inlet valve and meeting the water usage requirements in summer with high temperature.

[0037] It should be noted that among the four channels of the water inlet channel 410, the flow-limiting channel 43, the confluence channel 42, and the water outlet channel, the cross-sectional area of the flow-limiting channel 43 is the smallest to achieve small-flow water supply of the water inlet valve. At the same time, there is no need to install a flow-limiting ring inside the water inlet valve, which simplifies the structure of the water inlet valve and reduces the cost of the water inlet valve. When the water consumption of the external circulation water circuit is small, the water inlet valve switches to small-flow water supply to facilitate the rapid heating of the small-flow water flow to the rated temperature by the wall-mounted boiler. When the water consumption of the external circulation water circuit is large, especially in high-temperature summer, the first water replenishment channel 111 is communicated with the second water replenishment channel 120 to increase the water volume in the confluence channel 42 and achieve large-flow water supply of the water inlet valve. At this time, the water temperature entering the wall-mounted boiler is relatively high, and the wall-mounted boiler can also heat the large-flow water flow to the rated temperature to meet the water use requirements in high-temperature summer.

[0038] As Figure 2 and Figure 3 shown, the water inlet channel 410, the flow-limiting channel 43, and the confluence channel 42 all extend along the length direction of the water inlet valve body 4 (the left-right direction in the figure), and both ends of the flow-limiting channel 43 are directly communicated with the water inlet channel 410 and the confluence channel 42. Since the flow-limiting channel 43 is located between the water inlet channel 410 and the confluence channel 42, the water volume during small-flow water supply is limited according to the size of the cross-sectional area of the flow-limiting channel 43. The water inlet channel 410, the flow-limiting channel 43, and the confluence channel 42 extend in the same direction, reducing the flow resistance, increasing the flow velocity of the water flow, and being beneficial to improving the water supply efficiency of the water inlet valve.

[0039] As Figure 2 and Figure 3 shown, at the other end of the water inlet valve body 4 along the length direction, there is a water inlet joint 41. An inlet 411 communicated with the water inlet channel 410 is arranged inside the water inlet joint 41, and the cross-sectional area of the inlet 411 is greater than or equal to the cross-sectional area of the water inlet channel 410. The water inlet joint 41 is communicated with the external pipeline to supply water to the water inlet channel 410 through the inlet 411. Since the cross-sectional area of the inlet 411 is set to be not less than the cross-sectional area of the water inlet channel 410, it is ensured that a sufficient amount of water flow is supplied to the water inlet channel 410.

[0040] In addition, the sum of the cross-sectional areas of the first water replenishment channel 111 and the flow-limiting channel 43 is equal to the cross-sectional area of the water inlet channel 410. When the water inlet valve switches to large-flow water supply, a part of the water flow in the water inlet channel 410 flows through the first water replenishment channel 111 and the second water replenishment channel 120 to the confluence channel 42, and another part of the water flow in the water inlet channel 410 directly flows into the confluence channel 42 through the flow-limiting channel 43, that is, the sum of the water volumes in the first water replenishment channel 111 and the flow-limiting channel 43 is equal to the water volume in the water inlet channel 410.

[0041] As Figures 2 to 4As shown, the water inlet valve body 4 further has a water outlet joint 49 and a water replenishing joint 48. A water outlet communicating with the water outlet channel is arranged in the water outlet joint 49, and a water replenishing port communicating with the third water replenishing channel 112 is arranged in the water replenishing joint 48. The water replenishing valve body 1 includes a water replenishing pipe 11 and a water replenishing adjusting pipe 12. A first water replenishing channel 111 and a third water replenishing channel 112 are formed in the water replenishing pipe 11, and a second water replenishing channel 120 is formed in the water replenishing adjusting pipe 12. When the water replenishing valve body 1 is installed on the water inlet valve body 4, one end of the first water replenishing channel 111 communicates with the water inlet channel 410, and the third water replenishing channel 112 communicates with the water replenishing port. Specifically, a water replenishing switch 2 is further installed on the water replenishing valve body 1. The water replenishing switch 2 includes a valve rod and a handwheel. One end of the valve rod extends into the interior of the water replenishing valve body 1, and the other end of the valve rod is connected to the handwheel. By rotating the handwheel to drive the valve rod to move, the valve rod can connect or isolate the first water replenishing channel 111 and the third water replenishing channel 112. When the internal circulation water path is short of water, by manually rotating the handwheel to open the water replenishing switch 2, the first water replenishing channel 111 communicates with the third water replenishing channel 112, and part of the water flow in the water inlet channel 410 sequentially passes through the first water replenishing channel 111 and the third water replenishing channel 112, and finally flows from the water replenishing port to the internal circulation water path. Since the water replenishing switch 2 is a prior art, the specific structure and working process of the water replenishing switch 2 will not be described in detail.

[0042] As Figure 2 and Figure 3 shown, an impeller assembly 5 is arranged between the confluence channel 42 and the water outlet channel. The impeller assembly 5 is installed in the water inlet valve body 4 to drive the water flow in the water inlet valve body 4 to flow along the Figure 2 direction indicated by the arrow in the figure to the water outlet channel. The water outlet channel of this embodiment extends in the up-down direction in the figure and is perpendicular to the confluence channel 42. The blades of the impeller assembly 5 extend into the intersection of the confluence channel 42 and the water outlet channel, so that the water flow in the confluence channel 42 scours the blades and flows into the water outlet channel.

[0043] It should be noted that, as Figure 3 shown, the cross-sectional area of the water inlet channel 410 is greater than or equal to the cross-sectional area of the confluence channel 42 to ensure that a sufficient amount of water flow is supplied to the confluence channel 42 and avoid the volume of the water inlet valve body 4 being too large due to the too large cross-sectional area of the confluence channel 42. The cross-sectional area of the water inlet 411 of this embodiment is the largest, the cross-sectional areas of the water inlet channel 410 and the confluence channel 42 are equal or not much different, and the cross-sectional area of the flow-limiting channel 43 is the smallest. Therefore, a stepped channel is arranged in the water inlet valve body 4 along the length direction.

[0044] As Figure 2 and Figure 3As shown, one end of the water inlet valve body 4 in the length direction is provided with a process hole 44, and the process hole 44 is plugged with a plug 45. One end of the confluence channel 42 far from the current-limiting channel 43 is directly communicated with the process hole 44. By opening the process hole 44, the water inlet valve body 4 can process the internal channels in two directions of left and right, so as to realize the processing and manufacturing of the water inlet 411, the water inlet channel 410, the confluence channel 42 and the current-limiting channel 43, reducing the processing difficulty and cost of the water inlet valve body 4. After the water inlet valve body 4 is processed, the process hole 44 is closed by the plug 45 to ensure the sealing performance of the water inlet valve body 4. In this embodiment, the plug 45 is threadedly connected to the process hole 44 to realize the detachable installation of the plug 45.

[0045] As Figure 3 shown, a first communication cavity 46 and a second communication cavity 47 are further arranged in the water inlet valve body 4. The inner wall of the first communication cavity 46 is smoothly connected with the inner wall of the water inlet channel 410 in a transitional manner, and one end of the water inlet channel 410, the first communication cavity 46 and one end of the first water replenishing channel 111 are sequentially communicated. The inner wall of the second communication cavity 47 is smoothly connected with the inner wall of the confluence channel 42 in a transitional manner, and one end of the second water replenishing channel 120, the second communication cavity 47 and the confluence channel 42 are sequentially communicated. By arranging the first communication cavity 46, the flow resistance of the water flow in the water inlet channel 410 flowing into the first water replenishing channel 111 is reduced, and the flow velocity of the water flow in the first water replenishing channel 111 is increased. By arranging the second communication cavity 47, the flow resistance of the water flow in the second water replenishing channel 120 flowing into the confluence channel 42 is reduced, and the flow velocity of the water flow in the confluence channel 42 is increased.

[0046] As Figure 2 and Figure 5 shown, the water inlet valve further includes an electromagnetic switch 3. The electromagnetic switch 3 is installed between the first water replenishing channel 111 and the second water replenishing channel 120 to connect or disconnect the first water replenishing channel 111 and the second water replenishing channel 120. The electromagnetic switch 3 can realize the opening and closing of the second water replenishing channel 120 according to the amount of water used in the external circulation water path of the water inlet valve, thereby realizing the switching of the large and small water volumes of the water inlet valve.

[0047] Specifically, a communicating pipe 13 with an opening at the top is arranged in the water replenishing valve body 1. A communicating channel 131 is provided in the communicating pipe 13, and a cavity 132 is arranged outside the communicating pipe 13. The first water replenishing channel 111 communicates with the cavity 132, the communicating channel 131 communicates with the second water replenishing channel 120, and the cavity 132 and the communicating channel 131 are connected or blocked by an electromagnetic switch 3. When the electromagnetic switch 3 is closed, the cavity 132 is blocked from the communicating channel 131, and the water inlet valve supplies water in a small flow rate; when the electromagnetic switch 3 is opened, the first water replenishing channel 111, the cavity 132, the communicating channel 131 and the second water replenishing channel 120 are sequentially communicated, so that a part of the water flow in the water inlet channel 410 flows to the confluence channel 42, and another part of the water flow enters the confluence channel 42 after passing through the first water replenishing channel 111, the cavity 132, the communicating channel 131 and the second water replenishing channel 120, so as to increase the water volume in the confluence channel 42 and realize large-flow water supply.

[0048] The electromagnetic switch 3 of this embodiment includes an electromagnetic valve 31 and a sealing assembly. The electromagnetic valve 31 includes a valve seat 311 and a valve core 312. The valve seat 311 is installed on the water replenishing valve body 1. The sealing assembly is arranged in the water replenishing valve body 1. When the electromagnetic valve 31 is powered off, the valve core 312 presses against the sealing assembly to block the opening of the communicating pipe 13; when the electromagnetic valve 31 is powered on, the valve core 312 is disengaged from pressing against the sealing assembly. By controlling the opening and closing of the communicating pipe 13 with the electromagnetic valve 31, that is, controlling the connection and isolation between the cavity 132 and the communicating channel 131, the connection and isolation between the first water replenishing channel 111 and the second water replenishing channel 120 are controlled, and the switching of the large and small flow rate water supply of the water inlet valve is realized.

[0049] Specifically, the electromagnetic valve 31 includes a valve seat 311, a valve core 312 (usually a moving iron core) and a spring 313. The valve seat 311 is hermetically installed on the water replenishing valve body 1. The valve core 312 and the spring 313 are both installed in the valve seat 311. An electromagnetic coil is provided in the valve seat 311. When the electromagnetic valve 31 is powered on, the valve core 312 retracts into the valve seat 311 and compresses the spring 313; after the electromagnetic valve 31 is powered off, the spring 313 resets and pushes the end of the valve core 312 out of the valve seat 311.

[0050] As Figure 2 and Figure 5As shown, the sealing assembly includes an elastic diaphragm 32 and a sealing seat 33. The circumferential edge of the elastic diaphragm 32 is disposed on the inner sidewall of the cavity 132. The sealing seat 33 is mounted on the elastic diaphragm 32. When the solenoid valve 31 is de-energized, the valve core 312 presses against the sealing seat 33 to drive the elastic diaphragm 32 to block the opening of the communication pipe 13. When the solenoid valve 31 is energized, the valve core 312 is disengaged from pressing against the sealing seat 33, and the elastic diaphragm 32 is disengaged from pressing against the opening of the communication pipe 13. Specifically, the elastic diaphragm 32 is a rubber cup, and the circumferential edge of the elastic diaphragm 32 is mounted on the inner sidewall of the cavity 132 to achieve the sealed installation of the elastic diaphragm 32. At the same time, the elastic diaphragm 32 has good elastic deformation ability to move up and down along the vertical direction in the figure with the sealing seat 33, so that the elastic diaphragm 32 opens or blocks the opening at the top of the communication pipe 13 to control the communication and isolation between the cavity 132 and the communication channel 131.

[0051] Specifically, as Figure 6 and Figure 7 shown, the sealing seat 33 includes a seat body 331 and a gas guiding column disposed at the bottom end of the seat body 331. The elastic diaphragm 32 is provided with a mounting hole 321, and the gas guiding column passes through and is fixed in the mounting hole 321. Three mounting holes 321 are provided on the elastic diaphragm 32, so that the number of the gas guiding columns is the same as that of the mounting holes 321 and they pass through the three mounting holes 321 one by one, so that the sealing seat 33 and the elastic diaphragm 32 are assembled together to ensure the synchronous lifting movement of the sealing seat 33 and the elastic diaphragm 32.

[0052] Further, the gas guiding column includes a first column 332 and a second column 333. The first column 332 and the second column 333 respectively form a clamping groove 330 for accommodating the elastic diaphragm 32 with the seat body 331. A first column 332 is provided at the center of the seat body 331, and there are two second columns 333, and the two second columns 333 are arranged at intervals along the circumferential direction of the seat body 331. When the elastic diaphragm 32 is accommodated in the clamping groove 330 of the first column 332 and the second column 333, the reliable assembly of the elastic diaphragm 32 and the sealing seat 33 is realized, and at the same time, good sealing performance between the elastic diaphragm 32 and the sealing seat 33 is ensured.

[0053] As Figure 2As shown in the figure, the sealing seat 33 is provided with a sealing hole 3320 penetrating through the seat body 331 and the first column 332. The sealing seat 33 is also provided with an air inlet hole 3330 penetrating through the seat body 331 and the second column 333, so that the first water replenishing channel 111, the air inlet hole 3330 and the cavity 132 are sequentially communicated. When the electromagnetic valve 31 is powered off, the first column 332 extends into the communication channel 131, the second column 333 extends into the cavity 132, and the valve core 312 presses against the seat body 331 and blocks the sealing hole 3320. Specifically, when the electromagnetic valve 31 is powered off, the valve core 312 moves downward under the action of the spring 313 to push the sealing seat 33 and the elastic diaphragm 32 to move downward until the elastic diaphragm 32 presses against the seat body 331 of the sealing seat 33, and the valve core 312 blocks the sealing hole 3320. The water flow in the water inlet channel 410 enters the first water replenishing channel 111. At this time, a closed space is formed in the cavity 132 (that is, the water flow will not enter the cavity 132), and closed spaces also exist in the second water replenishing channel 120 and the communication channel 131. At this time, the pressure above the elastic diaphragm 32 is greater than the pressure below the elastic diaphragm 32, so a negative pressure environment is formed in the communication channel 131 to tightly adsorb the elastic diaphragm 32 at the opening at the top of the communication pipe 13 to ensure reliable blocking of the communication pipe 13, so that the first water replenishing channel 111 is isolated from the second water replenishing channel 120, and small-flow water supply of the water inlet valve is realized.

[0054] As Figure 5 shown in the figure, when the electromagnetic valve 31 is powered on, the valve core 312 squeezes the spring 313 and retracts into the valve seat 311. The valve core 312 is separated from pressing against the seat body 331 of the sealing seat 33, and the sealing hole 3320 is opened. At this time, the first water replenishing channel 111, the cavity 132, the communication channel 131 and the second water replenishing channel 120 are sequentially communicated. At this time, the pressure above the elastic diaphragm 32 is equal to the pressure below the elastic diaphragm 32. Under the push of the water flow in the first water replenishing channel 111, the sealing seat 33 and the elastic diaphragm 32 move upward. The elastic diaphragm 32 is separated from pressing against the communication pipe 13 to open the opening at the top of the communication pipe 13, so that the first water replenishing channel 111 is communicated with the second water replenishing channel 120. At this time, a part of the water flow in the water inlet channel 410 flows to the confluence channel 42, and another part of the water flow enters the confluence channel 42 after passing through the first water replenishing channel 111, the cavity 132, the communication channel 131 and the second water replenishing channel 120 to increase the water volume in the confluence channel 42, and large-flow water supply of the water inlet valve is realized.

[0055] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Water inlet valve, characterized in that, It includes a water replenishing valve body (1) and a water inlet valve body (4). A water inlet channel (410), a current-limiting channel (43), a confluence channel (42) and a water outlet channel are sequentially communicated within the water inlet valve body (4), and the cross-sectional area of the current-limiting channel (43) is the smallest. The water replenishing valve body (1) is installed on the water inlet valve body (4). A first water replenishing channel (111) and a second water replenishing channel (120) are arranged within the water replenishing valve body (1). One end of the first water replenishing channel (111) is communicated with the water inlet channel (410), one end of the second water replenishing channel (120) is communicated with the confluence channel (42), and the other end of the first water replenishing channel (111) and the other end of the second water replenishing channel (120) are selectively communicated or cut off.

2. The water inlet valve according to claim 1, characterized in that, The water inlet channel (410), the current-limiting channel (43) and the confluence channel (42) all extend along the length direction of the water inlet valve body (4), and both ends of the current-limiting channel (43) are directly communicated with the water inlet channel (410) and the confluence channel (42) respectively.

3. The inlet valve according to claim 2, characterized in that, A process hole (44) is formed at one end of the water inlet valve body (4) along the length direction, and a plug (45) is arranged to seal the process hole (44). One end of the confluence channel (42) far from the current-limiting channel (43) is directly communicated with the process hole (44).

4. The inlet valve according to claim 1, characterized in that, A first communication cavity (46) and a second communication cavity (47) are also arranged within the water inlet valve body (4). The inner wall of the first communication cavity (46) is smoothly transitionally connected with the inner wall of the water inlet channel (410), and the water inlet channel (410), the first communication cavity (46) and one end of the first water replenishing channel (111) are sequentially communicated; the inner wall of the second communication cavity (47) is smoothly transitionally connected with the inner wall of the confluence channel (42), and one end of the second water replenishing channel (120), the second communication cavity (47) and the confluence channel (42) are sequentially communicated.

5. The water inlet valve according to any one of claims 1 to 4, characterized in that, The sum of the cross-sectional areas of the first water replenishing channel (111) and the current-limiting channel (43) is equal to the cross-sectional area of the water inlet channel (410).

6. The inlet valve according to any one of claims 1 to 4, characterized in that The cross-sectional area of the water inlet channel (410) is greater than or equal to the cross-sectional area of the confluence channel (42).

7. The water inlet valve according to any one of claims 1 to 4, characterized in that, An impeller assembly (5) is arranged between the confluence channel (42) and the water outlet channel.

8. The water inlet valve according to any one of claims 1 to 4, characterized in that The other end of the water inlet valve body (4) along the length direction has a water inlet joint (41). A water inlet (411) communicated with the water inlet channel (410) is arranged within the water inlet joint (41), and the cross-sectional area of the water inlet (411) is greater than or equal to the cross-sectional area of the water inlet channel (410).

9. The water inlet valve according to any one of claims 1 to 4, characterized in that, The water inlet valve further includes an electromagnetic switch (3). The electromagnetic switch (3) is installed between the first water replenishing channel (111) and the second water replenishing channel (120) to communicate or cut off the first water replenishing channel (111) and the second water replenishing channel (120).

10. The water inlet valve according to claim 9, characterized in that, A communicating pipe (13) with an opening at the top is arranged in the water replenishing valve body (1). A communicating channel (131) is arranged in the communicating pipe (13). A cavity (132) is arranged outside the communicating pipe (13). The first water replenishing channel (111) is communicated with the cavity (132). The communicating channel (131) is communicated with the second water replenishing channel (120). The cavity (132) and the communicating channel (131) are communicated or blocked through the electromagnetic switch (3).

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