A metering solenoid valve

Abstract

A metering solenoid valve with a small flow sensor flux, small size and low cost, wherein the valve body is provided with a total water inlet channel and a water delivery channel A and a water delivery channel B connected to the outlet of the total water inlet channel; the water delivery channel A is connected with a valve A, so that the water delivery channel A is divided into a water inlet channel A and a water outlet channel A corresponding to the water inlet side and the water outlet side of the valve A respectively; the water delivery channel B is connected with a valve B, so that the water delivery channel B is divided into a water inlet channel B and a water outlet channel B corresponding to the water inlet side and the water outlet side of the valve B respectively, and the water outlet channel A and the water outlet channel B constitute the water outlet channel; the water outlet channel is provided with a shunt branch, the shunt branch spans between the water outlet channel A and the water outlet channel B, and the shunt branch is connected with a flow sensor. The present invention is suitable for use as a toilet flushing valve.

Description

Technical Field

[0001] The invention relates to a solenoid valve, in particular to a metering solenoid valve for flushing a toilet. Background Art

[0002] The toilet is commonly known as a toilet, which usually has a water tank. When flushing the toilet, the water tank is quickly drained to convert the gravitational potential energy of the water into kinetic energy to flush the toilet. The water consumption of flushing the toilet is determined by the capacity of the water tank, so the water tank is relatively large, which affects the appearance of the toilet, occupies a large space, and is not convenient for installation; in addition, firing a ceramic water tank consumes a lot of energy. In order to eliminate these disadvantages, the new toilet cancels the water tank and uses a solenoid valve. The water inlet is connected to the water source and the water outlet is connected to the toilet. The solenoid valve is opened and closed to supply water to the toilet for flushing. The outlet of the water inlet valve for flushing the toilet is located in the toilet. In the prior art, this water inlet valve has two water outlets, one of which is connected to the pipe on the flushing side of the barrel wall, which is called the "Rim" side, and the other water outlet is connected to the pipe on the siphon flushing side, which is called the "Jet" side. Usually the "Rim" side pipe outlet is located below the toilet seat, close to the seat, while the "Jet" side pipe outlet is located low, in the toilet water reservoir.

[0003] The toilet flushing water inlet solenoid valve can be referred to as the toilet solenoid valve. In order to improve the toilet flushing effect without wasting water, the toilet solenoid valve in the prior art is equipped with a flow sensor, which transmits the signal of water flow metering conversion to the controller to control the valve opening time and realize quantitative water use. The valve with two water outlets usually has a main water inlet channel and two water delivery channels connected to the main water inlet channel in the valve body, and each of the two water delivery channels has a valve. The flow sensor equipped with the toilet solenoid valve in the prior art is installed on the main water inlet channel, such as Figure 1 As shown, the total water flow through the water inlet channel is measured; there is also a flow sensor installed in series on a water delivery channel, such as Figure 2 As shown, this channel is generally the Jet side channel. In order to achieve efficient flushing, the total water inlet channel and the Jet side channel have a large flow rate, often 30L / min. In this way, the flow sensor must have a large flux, which inevitably leads to a large volume. In addition, in order to reduce the pressure / flow loss caused by the flow sensor to the water flow, the volume of the flow sensor needs to be large. These two factors lead to a large volume of the flow sensor, which brings high cost and other advantages and disadvantages caused by the large volume.

[0004] Another technical solution is to connect a pressure sensor in parallel to the water inlet channel of the toilet solenoid valve. The pressure sensor transmits the signal of the water inlet pressure to the controller, and the controller estimates the water flow rate of the solenoid valve according to the pressure, which can also achieve the purpose of controlling water consumption. However, such a pressure sensor is directly connected to the water source, has high water pressure resistance requirements, is expensive, and has a relatively large size. Summary of the invention

[0005] The present invention aims to solve the problem that the flow sensor in the metering solenoid valve for toilet flushing in the prior art is large in size and high in cost due to the limitations of the flow sensor connecting channel structure. For this purpose, a metering solenoid valve of the present invention is provided. The flow sensor connecting channel structure of the metering solenoid valve is unique, which can greatly reduce the flux and volume of the flow sensor, thereby reducing costs and facilitating installation and use.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is that a main water inlet channel and a water delivery channel A and a water delivery channel B connected to the outlet of the main water inlet channel are provided on the valve body; the water delivery channel A is connected to a valve A, so that the water delivery channel A is divided into a water inlet channel A and a water outlet channel A corresponding to the water inlet side and the water outlet side of the valve A respectively; the water delivery channel B is connected to a valve B, so that the water delivery channel B is divided into a water inlet channel B and a water outlet channel B corresponding to the water inlet side and the water outlet side of the valve B respectively, and the water outlet channel A and the water outlet channel B constitute a water outlet channel; the special feature is that a shunt branch is provided on the water outlet channel, the shunt branch is connected between the water outlet channel A and the water outlet channel B, and the shunt branch is connected to a flow sensor.

[0007] The water outlet channel B is preferably connected with a flow controller.

[0008] Furthermore, the water outlet channel A and the water outlet channel B are each connected to a negative pressure eliminator.

[0009] Specifically, the valve body is connected to a rear cover, which has a concave cavity A and a concave cavity B. The concave cavity A bypasses the water conveying channel A, and the concave cavity B bypasses the water conveying channel B. The valve body is provided with a valve seat A on the water outlet channel A, and a valve seat C is provided on the rear cover. The valve seat A and the valve seat C are coaxially met, and a valve core A is axially arranged at the corresponding positions of the valve seat A and the valve seat C. The front and rear valve sealing gaskets arranged in the middle of the valve core A correspond to the valve seat A and the valve seat C respectively; the valve body is provided with a valve seat B on the water outlet channel B, and a valve seat D is provided on the rear cover. The valve seat B and the valve seat D are coaxially met, and a valve core B is axially arranged at the corresponding positions of the valve seat B and the valve seat D. The front and rear valve sealing gaskets arranged in the middle of the valve core B correspond to the valve seat B and the valve seat D respectively; the rear cover is provided with an atmospheric open cavity connected to the valve seat C and the valve seat D.

[0010] Furthermore, the water inlet of the main water inlet channel, the water outlet of the water outlet channel A and the water outlet of the water outlet channel B face the same direction.

[0011] Preferably, the valve A and valve B are electromagnetic valves.

[0012] More preferably, the valve A and valve B are electromagnetic pilot valves.

[0013] Furthermore, the flow controller is connected to the section of the water outlet channel B on the water outlet side of the valve core B.

[0014] It is preferable that a drainage port is provided in the atmosphere open cavity.

[0015] Another technical scheme of the metering solenoid valve of the present invention is that a main water inlet channel and a water delivery channel A and a water delivery channel B connected to the outlet of the main water inlet channel are provided on the valve body; the water delivery channel A is connected to a valve A, so that the water delivery channel A is divided into a water inlet channel A and a water outlet channel A corresponding to the water inlet side and the water outlet side of the valve A respectively; the water delivery channel B is connected to a valve B, so that the water delivery channel B is divided into a water inlet channel B and a water outlet channel B corresponding to the water inlet side and the water outlet side of the valve B respectively, and the water outlet channel A and the water outlet channel B constitute the water outlet channel; the special feature is that a shunt branch is provided on the water outlet channel, the shunt branch is connected to the water outlet channel B, and a flow sensor is connected to the shunt branch.

[0016] Furthermore, a flow controller is connected to the water outlet channel B between the two connecting ends of the bypass branch, and a flow controller is provided on the water outlet channel B between the two connecting points of the bypass branch.

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a flow sensor of a metering solenoid valve connected to a main water inlet channel in the prior art;

[0019] Figure 2 It is a schematic diagram of a flow sensor of a metering solenoid valve in the prior art connected in series to a water delivery channel;

[0020] Figure 3 The flow sensor of the present invention is connected and installed in the flow branch, and the branch is connected across the water outlet channel A and the water outlet channel B;

[0021] Figure 4 It is a schematic diagram of the flow controller installed behind the flow sensor;

[0022] Figure 5 It is a schematic diagram of the flow controller installed in front of the flow sensor;

[0023] Figure 6 It is a schematic diagram of two vacuum breakers installed behind the flow sensor;

[0024] Figure 7 This is a diagram showing that the vacuum breaker on the "Jet" side is installed behind the flow sensor, and the vacuum breaker on the "Rim" side is installed in front of the flow sensor;

[0025] Figure 8 This is a diagram showing the "Jet" side vacuum breaker installed in front of the flow sensor and the "Rim" inner side vacuum breaker installed behind the flow sensor;

[0026] Fig. 9 It is a schematic diagram of two vacuum breakers installed in front of the flow sensor;

[0027] Fig.10 It is a schematic diagram of the flow sensor installed in the bypass branch of the Rim side channel;

[0028] Fig.11 It is an appearance diagram of the present invention;

[0029] Fig.12 yes Fig.11 The appearance of the present invention after rotating 90° clockwise around the longitudinal axis of the water inlet channel;

[0030] Fig.13 yes Fig.12 A-direction schematic diagram;

[0031] Fig.14 yes Fig.13 BB cross-sectional view;

[0032] Fig.15 yes Fig.11 A schematic diagram after rotation;

[0033] Fig.16 yes Fig.15 CC section view;

[0034] Fig.17 yes Fig.12 A schematic diagram after rotation;

[0035] Fig.18 yes Fig.17 DD cross-sectional view.

[0036] Markings and corresponding parts in the figure: 1 valve body, 101 water outlet A, 102 water inlet, 103 water outlet B, 104 valve seat A, 105 valve seat B, 106 water inlet main channel, 107 water inlet channel A, 108 water outlet channel A, 1081 water outlet channel A front area, 1082 water outlet channel A rear area, 109 water inlet channel B, 110 water outlet channel B, 1101 water outlet channel B front area, 1102 water outlet channel B rear area, 2 valve cover, 201 pilot valve seat A, 3 electromagnetic coil B, 4 drain port, 5 back cover, 501 valve seat C, 502 valve seat D, 503 concave cavity A, 504 concave cavity B, 6 electromagnetic coil A, 7 flow sensor, 8 valve core A, 9 atmospheric opening cavity, 10 valve core B, 11 flow controller, 12 back pressure cavity A, 13 diaphragm plate A, 14 diaphragm A, 15 negative pressure eliminator. DETAILED DESCRIPTION

[0037] Embodiment 1

[0038] A metering solenoid valve, a valve body 1 is provided with a water inlet 102, a water inlet main channel 106, and a water delivery channel A and a water delivery channel B connected to the outlet of the water inlet main channel; the water delivery channel A is connected with a valve A VA, so that the water delivery channel A is divided into a water inlet channel A107 and a water outlet channel A108 corresponding to the water inlet side and the water outlet side of the valve A respectively; the water delivery channel B is connected with a valve B VB, so that the water delivery channel B is divided into a water inlet channel B109 and a water outlet channel B110 corresponding to the water inlet side and the water outlet side of the valve B respectively; the valve body 1 is connected with a back cover 5, the back cover has a concave cavity A503 and a concave cavity B504, the concave cavity A503 is bypassed with the water delivery channel A, and the concave cavity B504 is bypassed with the water delivery channel B; the valve body 1 is provided with a valve seat A104 on the water outlet channel A, and the back cover 5 is provided with The valve seat C501, the valve seat A104 and the valve seat C501 are coaxially connected, the valve core A8 is axially arranged at the corresponding position of the valve seat A and the valve seat C, the front and rear valve seal gaskets arranged in the middle of the valve core A8 correspond to the valve seat A104 and the valve seat C501 respectively, the valve core A8 divides the water outlet channel A108 into the front area 1081 of the water outlet channel A and the rear area 1082 of the water outlet channel A, and the rear area 1082 of the water outlet channel A is parallel to the front area 1081 of the water outlet channel A. The valve body 1 is provided with a valve seat B105 on the water outlet channel B, and a valve seat D502 is provided on the rear cover 5. The valve seat B and the valve seat D are coaxially facing each other. A valve core B10 is axially provided at the corresponding positions of the valve seat B and the valve seat D. The front and rear valve seal gaskets provided in the middle of the valve core B correspond to the valve seat B105 and the valve seat D502 respectively. The valve core B10 divides the water outlet channel B110 into a front area 1101 of the water outlet channel B and a rear area 1102 of the water outlet channel B. The rear area 1102 of the water outlet channel B is arranged in parallel with the front area 1101 of the water outlet channel B, and the water flow direction is opposite; thus, the water inlet 102, the water outlet A101 and the water outlet B103 face the same direction; the rear cover 5 is provided with an atmospheric open cavity 9 connected with the valve seat C501 and the valve seat D502, and the atmospheric open cavity 9 is provided with a drain port 4; the rear area 1102 of the water outlet channel B is provided with a flow controller 11, see Figure 4 , 14 The valve body 1 is connected to a flow sensor 7, which is connected to a shunt channel, which is connected to the outlet channel A108 and the outlet channel B110, see Figure 3-8 , especially across the front area 1081 of the water outlet channel A and the front area 1101 of the water outlet channel B, see Figure 4 , 17 , 18;

[0039] The valve A and valve B are electromagnetic pilot valves; valve A, see Fig.16A valve seat is provided between the water inlet channel A107 and the front area 1081 of the water outlet channel A, and a diaphragm plate A13 is provided corresponding to the valve seat. A diaphragm A14 for opening / closing the valve seat is embedded on the diaphragm plate A. A valve cover 2 is connected to the valve body 1, and a back pressure cavity A12 is formed between the valve cover 2 and the diaphragm plate A13 and the diaphragm A14. A pilot valve seat A201 is provided on the valve cover 2, and the back pressure cavity A12 is connected to the pilot valve seat A201, and the pilot valve seat A201 is connected to the front area 1801 of the water outlet channel A. An electromagnetic valve assembly including an electromagnetic coil A6 is provided corresponding to the pilot valve seat A201; the structure of valve B is similar to that of valve A.

[0040] The metering solenoid valve of the present invention is used for water delivery and flushing of a toilet. The water inlet 102 is connected to a water supply pipe, and the water outlet A101 and the water outlet B103 are respectively connected to a siphon flushing pipe and a rim flushing pipe of the toilet. The electromagnetic coil A6 is energized, the pilot valve seat A201 is opened, the back pressure chamber A12 is discharged and the pressure is released, the diaphragm plate A13 drives the diaphragm A14 to leave the valve seat, the valve A is opened, and the water in the water inlet channel A107 enters the front area 1081 of the water outlet channel A. Under the action of pressure, the valve core A8 moves backward, and the front valve seal gasket of the valve core A8 leaves the valve seat A104, and the water flows through the rear area 1082 of the water outlet channel A and is output from the water outlet A101 to realize the siphon side flushing of the toilet. When the valve core A8 moves backward into place, the rear valve seal gasket of the valve core A closes the valve seat C501, and water will not enter the atmosphere open cavity 9, unless a small amount of water enters the atmosphere open cavity 9 at the beginning of water delivery, and the entered water is discharged from the drain port 4. The electromagnetic coil B3 is energized, the valve B is opened, and the water in the water inlet channel B109 is finally output from the water outlet B103. This process is similar to the above process, and this process realizes the flushing of the toilet wall side; since the flushing outlet of the toilet wall side is under the seat ring and close to the seat ring, a flow controller 11 is provided in the rear area 1102 of the water outlet channel B to prevent splashing water.

[0041] The atmosphere opening chamber 9 is connected to the valve seat C 501 and the valve seat D 502. As for the water delivery channel A, when the water supply side of the valve A stops water supplying and other reasons cause the water delivery system including the water outlet channel A 108 to have negative pressure, under the action of the atmospheric pressure connected to the atmosphere opening chamber 9, the valve core A8 automatically moves in the water inlet direction, the valve seat A104 is closed, the valve seat C501 is opened, the atmosphere is sucked in, and the negative pressure in the rear area 1802 of the water outlet channel A is eliminated, preventing the contaminated liquid remaining in the direction of the water outlet A101 from being sucked back, and the closure of the valve seat A104 further prevents even if there is some contaminated liquid in the rear area 1082 of the water outlet channel A, it will not enter the pipeline in the direction of the water supply side; as mentioned above, the water outlet A101 is connected to the "Jet" side outlet. Similarly, the negative pressure phenomenon and the principle of preventing sewage backflow and reflux in the water supply channel B are similar to those described above. The water outlet B103 of the water supply channel B is connected to the "RIM" side outlet of the toilet, which is located under the toilet seat and close to the seat. When the toilet is blocked and the sewage in the toilet rises, the effect of preventing sewage backflow and reflux becomes very important. On the other hand, when the toilet is not blocked but the negative pressure situation occurs, the atmosphere is quickly and efficiently replenished by the atmospheric open cavity 9, which can quickly and efficiently eliminate the negative pressure and avoid the disadvantages of small air intake and insufficient negative pressure elimination in the prior art.

[0042] Fig.14 The back cover 5, the atmosphere opening cavity 9, the valve core A8, the valve seat C501 and the valve seal gasket are composed of Figure 6 The vacuum eliminator 15 on the "Jet" side and the vacuum eliminator 15 on the "Rim" side include the valve core B10, valve seat D502, etc. Figure 6 , 18 A shunt branch is connected between the front area 1801 of the water outlet channel A and the front area 1101 of the water outlet channel B. The flow sensor 7 is connected to the shunt branch, which can easily achieve the relatively small flux required by the shunt branch, thereby greatly reducing the flux of the flow sensor 7. The flux of the flow sensor used in the present invention is about 100mL / min, while the prior art requires about 30L / min, which is 300 times the difference. Therefore, the present invention can greatly reduce the volume, save costs, and facilitate installation and use.

[0043] Open valve A VA, water flows out from the "Jet" side, and a small flow of water is diverted to the "Rim" side. The water flow derived from the signal of flow sensor 7 can be converted into the water flow of the "Jet" side, because the path ratio of the two flow paths is constant; similarly, open valve B VB, water flows out from the "Rim" side, and a small flow of water is diverted to the "Jet" side. The water flow derived from the signal of flow sensor 7 can be converted into the water flow of the "Rim" side; in fact, the "Jet" side flow can be obtained at the same time as the "Rim" side flow, because the path ratio of the water flow on the two sides is also constant.

[0044] Embodiment 2

[0045] In this example, the metering solenoid valve Fig.10 The valve body 1 is provided with a main water inlet channel 106 and a water delivery channel A and a water delivery channel B connected to the outlet of the main water inlet channel; the water delivery channel A is connected with a valve AVA, so that the water delivery channel A is divided into a water inlet channel A107 and a water outlet channel A108 corresponding to the water inlet side and the water outlet side of the valve A respectively; the water delivery channel B is connected with a valve BVB, so that the water delivery channel B is divided into a water inlet channel B109 and a water outlet channel B110 corresponding to the water inlet side and the water outlet side of the valve B respectively, and the water outlet channel A and the water outlet channel B constitute a water outlet channel; the water outlet channel is provided with a shunt branch, which is connected to the water outlet channel B by a bypass, and a flow sensor is connected to the shunt branch, and a flow controller 11 is connected to the water outlet channel B between the two ends of the bypass shunt branch.

Claims

1. A metering solenoid valve, wherein a valve body (1) is provided with a water inlet main channel (106) and a water delivery channel A and a water delivery channel B connected to the outlet of the water inlet main channel; the water delivery channel A is connected to a valve A (VA), so that the water delivery channel A is divided into a water inlet channel A (107) and a water outlet channel A (108) corresponding to the water inlet side and the water outlet side of the valve A respectively; the water delivery channel B is connected to a valve B (VB), so that the water delivery channel B is divided into a water inlet channel B (109) and a water outlet channel B (110) corresponding to the water inlet side and the water outlet side of the valve B respectively, and the water outlet channel A and the water outlet channel B constitute a water outlet channel; wherein: The water outlet channel is provided with a flow branch, the flow branch is connected between the water outlet channel A and the water outlet channel B, and the flow branch is connected to a flow sensor (7).

2. The metering solenoid valve according to claim 1, characterized in that The water outlet channel B is connected to a flow controller (11).

3. The metering solenoid valve according to claim 1, characterized in that The water outlet channel A and the water outlet channel B are each connected to a negative pressure eliminator (15).

4. The metering solenoid valve according to claim 1, characterized in that The valve body is connected to a rear cover (5), which has a concave cavity A (503) and a concave cavity B (504), wherein the concave cavity A is in bypass communication with the water delivery channel A, and the concave cavity B is in bypass communication with the water delivery channel B; the valve body is provided with a valve seat A (104) on the water outlet channel A, and the rear cover is provided with a valve seat C (501), wherein the valve seat A and the valve seat C are coaxially connected, and a valve core A (8) is axially provided at the corresponding positions of the valve seat A and the valve seat C, and the front and rear portions of the valve core A are provided with a valve seat C (501) and a valve seat C (501) are provided at the middle of the valve core A. The rear valve seal gaskets correspond to the valve seat A and the valve seat C respectively; the valve body is provided with a valve seat B (105) on the water outlet channel B, and the rear cover is provided with a valve seat D (502), the valve seat B and the valve seat D are coaxially facing each other, and a valve core B (10) is axially provided at the corresponding positions of the valve seat B and the valve seat D, and the front and rear valve seal gaskets provided in the middle of the valve core B correspond to the valve seat B and the valve seat D respectively; the rear cover is provided with an atmospheric open cavity (9) which is connected with the valve seat C and the valve seat D.

5. The metering solenoid valve according to claim 1, 2, 3 or 4, characterized in that The water inlet of the main water inlet channel, the water outlet of the water outlet channel A and the water outlet of the water outlet channel B face the same direction.

6. The metering solenoid valve according to claim 1, 2, 3 or 4, characterized in that The valve A and valve B are electromagnetic valves.

7. The metering solenoid valve according to claim 6, characterized in that The valve A and valve B are electromagnetic pilot valves.

8. The metering solenoid valve according to claim 7, characterized in that The water outlet channel B is connected to a flow controller (11), and the flow controller is connected to a section of the water outlet channel B on the water outlet side of the valve core B.

9. The metering solenoid valve according to claim 4, characterized in that The rear cover is provided with an atmosphere open cavity (9) communicating with the valve seat C and the valve seat D, and the atmosphere open cavity is provided with a drainage port.

10. A metering solenoid valve, wherein a valve body (1) is provided with a water inlet main channel (106) and a water delivery channel A and a water delivery channel B connected to the outlet of the water inlet main channel; the water delivery channel A is connected to a valve A (VA), so that the water delivery channel A is divided into a water inlet channel A (107) and a water outlet channel A (108) corresponding to the water inlet side and the water outlet side of the valve A respectively; the water delivery channel B is connected to a valve B (VB), so that the water delivery channel B is divided into a water inlet channel B (109) and a water outlet channel B (110) corresponding to the water inlet side and the water outlet side of the valve B respectively, and the water outlet channel A and the water outlet channel B constitute a water outlet channel; wherein: The water outlet channel is provided with a shunt branch, which is connected to the water outlet channel B. The shunt branch is connected to a flow sensor (7), and a flow controller (11) is provided on the water outlet channel B between the connection points on both sides of the shunt branch.

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