A dispensing assembly and method of controlling the same

Abstract

The application provides a dosing assembly and a control method thereof. The dosing assembly is respectively communicated with a water supply device and a washing part. The dosing assembly comprises an electric control part, a main pipeline and at least two dosing pipelines. The inlet of the main pipeline is connected with the water supply device. The outlet of the main pipeline is communicated with the washing part. A main pipeline valve is arranged on the main pipeline. The inlet of the dosing pipeline is connected with a washing agent supply device. The outlet of the dosing pipeline is communicated with the outlet of the main pipeline valve. A dosing valve is arranged on the dosing pipeline. The electric control part is respectively connected with the main pipeline valve and the dosing valve. The dosing assembly and the control method thereof can ensure the accurate control of each valve body, avoid the abnormal opening and closing of the valve body caused by the current or electric signal interference, ensure the reliability and convenience of the valve body assembly, and do not need to separately produce the valve body assembly structure, thereby reducing the production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a dispensing assembly and a control method thereof. BACKGROUND

[0002] With the development of economy, people's living standards are constantly improving, and the demand for washing equipment (such as washing machines, dishwashers) is also increasing. For the existing washing equipment, an automatic washing agent dispensing device is often provided, and the user only needs to store the washing agent in the automatic dispensing device in advance, and the washing equipment automatically realizes the dispensing of the washing agent through the automatic dispensing device.

[0003] Various automatic washing agent dispensing devices are disclosed in the prior art. For example, patent CN103397496B discloses a washing agent dispensing controller, which has a main channel, one end of the main channel is an inlet for inputting liquid flow, the other end of the main channel is an outlet that can be connected with the water inlet of a washing barrel, and is provided with valve A, valve B, valve C, valve D, a liquid collecting cavity and a Venturi negative pressure generator. The inlet of valve A is connected with the bypass of the main channel, the inlet of valve B can be connected with a washing agent A storage tank, the outlets of valve A and valve B are connected with the inlet of valve C, the inlet of valve D can be connected with a washing agent B storage tank, the outlets of valve C and valve D are connected with the inlet of the liquid collecting cavity, the outlet of the liquid collecting cavity is connected with the negative pressure port of the Venturi negative pressure generator through a return channel, the outlet of the Venturi negative pressure generator is connected with the inlet of the main channel, and the inlet of the Venturi negative pressure generator is connected with a water source. Among them, patent CN103397496B realizes the dispensing of the washing agent through the negative pressure adsorption principle of the Venturi device, and valve A and valve C are both normally open valves, and valve B and valve D are both normally closed valves. At the same time, the patent involves two circuit control processes or control signals, the first circuit control process controls valve A and valve B at the same time, and valve A and valve B are linked, that is, valve B is opened at the same time when valve A is closed, and valve B is closed at the same time when valve A is opened. Similarly, the second circuit control process controls valve C and valve D at the same time, and valve C and valve D are linked.

[0004] In patent CN103397496B, valve A, valve B, valve C, valve D are part of integrated valve; the researchers of the present application found that the integrated valve involved in patent CN103397496B is described in detail in another patent CN203477553U applied by the same applicant; specifically, patent CN203477553U discloses a switching valve, the valve body is provided with a water inlet, a water outlet and an electromagnetic control assembly one, the electromagnetic control assembly one has an electromagnetic coil one, a piston one and an iron core one, the piston one is connected with a piston cap one at the front end, the valve body is provided with a liquid inlet one, a valve seat A, a valve seat B, an inner cavity one and a channel one, the inlet side of the valve seat A is communicated with the liquid inlet one, one end of the channel one is communicated with the water inlet, the other end is communicated with the inlet side of the valve seat B, the outlet side of the valve seat A and the outlet side of the valve seat B are opened to the inner cavity one, the valve seat A and the valve seat B correspond to the electromagnetic valve assembly one, the outlet side of the valve seat A and the outlet side of the valve seat B are coaxially corresponding and have a distance in the inner cavity one, the piston cap one of the electromagnetic valve assembly one is located in the range of the distance between the outlet side of the valve seat A and the outlet side of the valve seat B, and in the normal state, the piston cap one closes the valve seat A and opens the valve seat B; the inner cavity one can be communicated with the water outlet.

[0005] The researchers of the present application analyzed the specific structure of the switching valve in patent CN203477553U and its use method, and found that the switching valve is consistent with the two-position three-way valve disclosed in the prior art;

[0006] For example, prior art 1 ( "Normally open elastic sealing two-position three-way electromagnetic valve", Yang Renkui, Lin Xinmin, Jiang Xuewen, "Foundry Machinery", 1973.04, pp.60-61) disclosed in 1973, which discloses the structure of a normally open elastic sealing two-position three-way electromagnetic valve, and explains its action principle: when the movable electromagnet is powered on, it directly pushes the valve rod, and when it is powered off, it is reset by the pressure spring, thereby opening and closing or switching the air path; specifically, when the coil is not powered, compressed air enters from the air inlet, passes through the gap formed by the pressure spring, enters the middle cavity of the valve body, and then enters one side of the air cylinder through the air inlet, that is, the air inlet and the air inlet are connected, and the exhaust port is disconnected; when the coil is powered on, an electromagnetic field is generated to attract the armature, which pushes the valve rod through the magnet and the extension rod, opens the exhaust port, and closes the air inlet, so that the air inlet and the exhaust port are connected.

[0007] Prior art 2 ( "High-speed large-flow two-position three-way switch electromagnetic valve", Zhang Xiaojun, Zhu Guowei, Cui Kelun, "Valve", 2001.02, pp.6-8) disclosed in 2001, which designs a new type of two-position three-way cone valve and discloses its specific structure and working principle, as shown in Figure 1As shown, the two-position three-way conical valve can be used as a normally open valve, and can also be used as a normally closed valve; when it is used as a normally open valve, the left end oil channel I is an oil inlet, the middle oil channel III is a control port, and the right end oil channel II is an oil return port; when the electromagnetic valve is powered on, under the action of electromagnetic force, the moving iron core 4 and the outer valve 6 overcome the resistance of the return spring 3 to move to the left until the outer valve 6 is pressed tightly with the left inner conical valve core 1 and separated from the right inner conical valve core 8, at this time the oil inlet is disconnected with the control port, and the oil return port is connected with the control port; when the power is off, the moving armature and the outer valve 6 move to the right under the action of the return spring 3 until the outer valve 6 is pressed tightly with the right inner conical valve core 8 and separated from the left inner conical valve core 1, at this time the oil inlet is connected with the control port, and the oil return port is disconnected with the control port.

[0008] It can be seen that the switching valve in the patent CN203477553U is similar in structure to the normally open two-position three-way valve in the prior art, and the working principle or action mode is basically the same; but compared with the normally open two-position three-way valve in the prior art, on the basis of the two-way control process in the patent CN103397496B, the switching valve in the patent CN203477553U not only has a complex structure, but also needs to separately open a mold for the corresponding assembly structure and separately assemble each group of linkage valve bodies when cooperating with the washing equipment and the automatic feeding device, which is not conducive to improving the assembly reliability and convenience, and also increases the production cost. SUMMARY

[0009] Therefore, the present application aims to provide a feeding assembly and a control method thereof, based on at least two electrical signals for controlling the feeding assembly in the prior art, to solve the problems of complex structure of the switching valve in the automatic feeding device in the prior art, poor assembly reliability and convenience.

[0010] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0011] A feeding assembly, which is in communication with a water supply device and a washing part respectively, comprises an electric control component, a main pipeline and at least two feeding pipelines, the inlet of the main pipeline is connected with the water supply device, the outlet of the main pipeline is in communication with the washing part, a main valve is arranged on the main pipeline, the inlet of the feeding pipeline is connected with a washing agent supply device, the outlet of the feeding pipeline is in communication with the outlet of the main valve, and a feeding valve is arranged on the feeding pipeline; the electric control component is connected with the main valve and the feeding valve respectively.

[0012] Further, the electric control component comprises a power supply device and a one-way current limiting device, the power supply device is connected with the feeding valve, and the power supply device is connected with the main valve through the one-way current limiting device.

[0013] Further, the one-way current limiting device is a diode or a relay.

[0014] Further, the one-way current limiting device comprises a main body, a moving contact, a first static contact and a second static contact, the moving contact is matched with the first static contact and the second static contact respectively, the moving contact is connected with the main body, the main body is connected with the power supply device, the first static contact is connected with the power supply device, and the first static contact and the main body are in parallel connection, and the second static contact is connected with the main valve.

[0015] Further, the main valve is an electromagnetic valve or an electric valve, and the delivery valve is an electromagnetic valve or an electric valve.

[0016] Further, the main valve is a normally open valve, and the delivery valve is a normally closed valve.

[0017] Further, the delivery assembly comprises a first delivery pipeline and a second delivery pipeline, a first delivery valve is arranged on the first delivery pipeline, and a second delivery valve is arranged on the second delivery pipeline; the electric control component comprises a first power supply device, a second power supply device, a first one-way current limiting device and a second one-way current limiting device; the first power supply device is connected with the first delivery valve, and the first power supply device is connected with the main valve through the first one-way current limiting device; the second power supply device is connected with the second delivery valve, and the second power supply device is connected with the main valve through the second one-way current limiting device.

[0018] Further, the first one-way current limiting device is a diode or a relay, the second one-way current limiting device is a diode or a relay, the main valve is a normally open valve, and the first delivery valve and the second delivery valve are normally closed valves.

[0019] A control method of a delivery assembly comprises the following steps.

[0020] S1, a water supply device is started, the main valve is in an open state, and the delivery valve is in a closed state.

[0021] S2, a power supply device is started, the main valve is closed, the delivery valve is opened, and the delivery of a washing agent is performed.

[0022] S3, it is judged whether the delivery amount or the delivery time of the washing agent reaches a preset value; if not, the step S2 is returned; if yes, the step S4 is performed.

[0023] S4, the power supply device is closed, the main valve is restored to the open state, and the delivery valve is restored to the closed state.

[0024] S5, the water supply device is closed.

[0025] Compared with the prior art, the delivery assembly and the control method thereof have the following advantages.

[0026] The application discloses a feeding assembly and a control method thereof, and still keeps at least two electric signals in the prior art for controlling the feeding assembly, and the electrically controlled components are provided with one-way current limiting devices by arranging the solenoid valves or electric valves which can be easily purchased on the market on corresponding pipelines, so that the accurate control of the valve bodies is ensured, the abnormal opening and closing of the valve bodies caused by the mutual interference of the two or more electric signals or the wrong electric signal flow direction is avoided, and compared with the switching valve and the two-position three-way valve in the prior art, the solenoid valves or electric valves are relatively low in price and simple in structure, can be directly and firmly arranged on the corresponding pipelines, and are favorable for improving the reliability and convenience of the valve body assembly.

[0027] Meanwhile, the application does not need to change the electric signal control device of the existing washing equipment, only needs to arrange the valve bodies on corresponding pipelines, then electrically connects the power supply devices and the one-way current limiting devices with the valve bodies, and then electrically connects the power supply devices with the electric signal control device of the washing equipment, so that the convenience of the feeding assembly assembly is ensured, the separate mold production of the assembly structure of the feeding assembly is not needed, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitations to the present application. In the drawings:

[0029] Figure 1 It is a structure schematic view of a two-position three-way valve in the prior art.

[0030] Figure 2 It is a structure schematic view of the feeding assembly in the feeding assembly and the control method thereof according to the embodiment of the present application.

[0031] Figure 3 It is an assembly schematic view of the feeding assembly in the feeding assembly and the control method thereof according to the embodiment of the present application.

[0032] Figure 4 It is an assembly schematic view of the feeding assembly in the feeding assembly and the control method thereof according to the embodiment of the present application.

[0033] Figure 5 It is another structure schematic view of the feeding assembly in the feeding assembly and the control method thereof according to the embodiment of the present application.

[0034] Figure 6 It is another assembly schematic view of the feeding assembly in the feeding assembly and the control method thereof according to the embodiment of the present application.

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] Left inner taper valve core 1, static core 2, reset spring 3, moving iron core 4, gland 5, outer valve 6, valve body 7, right inner taper valve core 8, main pipeline 101, delivery pipeline 102, first delivery pipeline 102a, second delivery pipeline 102b, main valve 11, delivery valve 12, first delivery valve 12a, second delivery valve 12b, power supply device 13, first power supply device 13a, second power supply device 13b, one-way current limiting device 14, main body 140, movable contact 141, first static contact 142, second static contact 143, first one-way current limiting device 14a, second one-way current limiting device 14b, detergent supply device 15, water supply device 16, washing part 17. DETAILED DESCRIPTION

[0037] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0038] The present embodiment is directed to a delivery assembly in a washing device, which has an automatic delivery function, and has the same function as a conventional automatic delivery device. The delivery assembly is used to control a detergent delivery passage and a washing water delivery passage to achieve automatic delivery of the detergent.

[0039] In the prior art, the switching valve involved in the automatic delivery device not only has a complex structure, but also needs to be separately molded for the corresponding assembly structure when cooperating with the automatic delivery device, and each group of linkage valve bodies needs to be separately assembled, which is not conducive to improving the assembly reliability and convenience, and also increases the production cost. In order to solve the problem of complex structure of the switching valve in the prior art, poor assembly reliability and convenience, the present application will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

[0040] Embodiment 1

[0041] As shown in FIGS. 1-3, the present embodiment provides a delivery assembly, which is in communication with a water supply device 16 and a washing part 17 respectively, and the delivery assembly comprises a main pipeline 101 and at least two delivery pipelines 102. The inlet of the main pipeline 101 is connected with the water supply device 16, the outlet of the main pipeline 101 is in communication with the washing part 17, a main valve 11 is arranged on the main pipeline 101, the inlet of the delivery pipeline 102 is connected with a detergent supply device 15, the outlet of the delivery pipeline 102 is in communication with the outlet of the main valve 11, and a delivery valve 12 is arranged on the delivery pipeline 102. Figure 2 Figure 3 As shown in FIGS. 1-3, the present embodiment provides a delivery assembly, which is in communication with a water supply device 16 and a washing part 17 respectively, and the delivery assembly comprises a main pipeline 101 and at least two delivery pipelines 102. The inlet of the main pipeline 101 is connected with the water supply device 16, the outlet of the main pipeline 101 is in communication with the washing part 17, a main valve 11 is arranged on the main pipeline 101, the inlet of the delivery pipeline 102 is connected with a detergent supply device 15, the outlet of the delivery pipeline 102 is in communication with the outlet of the main valve 11, and a delivery valve 12 is arranged on the delivery pipeline 102.

[0042] ​Among them, in order to realize the application of the dispensing component on the washing equipment, the detergent supply device 15 is used to supply one or more detergents, such as detergent, bleach, softener, etc.; the water supply device 16 is a supply device for washing water, which can be a conventional water pipe or water tank; the washing part 17 has a cavity structure, which is used to hold and wash laundry, washing water, and detergents, such as the washing barrel of a conventional washing machine, the washing barrel of a dishwasher, etc.; since its relevant specific structure and usage method are all existing technologies, they will not be repeated here.

[0043] In order to facilitate the control of the delivery component, the delivery component also includes an electronic control component, which is respectively connected to the main valve 11 and the delivery valve 12; at the same time, the main valve 11 is a solenoid valve or an electric valve, and similarly, the delivery valve 12 is a solenoid valve or an electric valve; in addition, as a preference, the main valve 11 is a normally open valve, and the delivery valve 12 is a normally closed valve.

[0044] In this embodiment, based on the prior art, the electronic control component provides at least two electrical signals to control the dispensing component. The corresponding electrical signals all correspond to the main valve 11, and for each dispensing valve 12 on the dispensing pipeline 102, there is an electrical signal corresponding to it, so that the main valve 11 and any dispensing valve 12 are in a linkage relationship, so that when the electronic control component provides any electrical signal, the corresponding dispensing valve 12 is opened, and the main valve 11 is closed at the same time for dispensing detergent; when the electronic control component stops providing electrical signals, the main valve 11 returns to the open state, and the corresponding dispensing valve 12 returns to the closed state.

[0045] However, since the multiple electrical signals provided by the electronic control component all pass through the main valve 11, it is easy for two or more electrical signals to interfere with each other or the electrical signals to flow in the wrong direction, causing the release valve 12 that does not need to be opened to be opened, resulting in valve body control error or failure; therefore, in order to avoid abnormal opening and closing of the valve body caused by electrical signal interference or wrong flow direction, the researchers of the present invention have made further improvements to the release component after in-depth analysis and research on the existing technology; specifically, on the basis of the electronic control component providing at least two electrical signals to control the release component, the electronic control component includes a power supply device 13 and a one-way current limiting device 14, the power supply device 13 is connected to the release valve 12, and the power supply device 13 is connected to the main valve 11 through the one-way current limiting device 14, so that the current direction between the power supply device 13 and the release valve 12 is only from the power supply device 13 to the release valve 12.

[0046] The power supply device 13 is a conventional power supply device in the prior art, which can be a DC power supply, an AC power supply, or the power supply device 13 is connected to a conventional 220V or 380V power line, and the power supply device 13 has a transformer or an AC-to-DC converter, which can convert the conventional 220V or 380V power into power that can be used by the main valve 11, the delivery valve 12 and other components. Since they are all prior art, they are not described in detail here;

[0047] The one-way current limiting device 14 is used to limit the current in one direction. In this embodiment, the one-way current limiting device 14 is set so that the current can only be transmitted from the power supply device 13 to the injection valve 12, and cannot be transmitted from the injection valve 12 to the power supply device 13. In actual use, the one-way current limiting device 14 can be a diode, a relay, etc., depending on the power supply conditions and the electrical specifications of the main valve 11, the injection valve 12, and other components.

[0048] Considering that people often use different detergents according to their needs when using washing equipment, in order to meet people's needs, especially the need to use multiple detergents in one washing process; Figure 3 , Attachment Figure 4 As shown, in this embodiment, the delivery assembly includes at least two delivery pipelines 102;

[0049] Taking the example of a delivery component including two delivery pipelines, the delivery component includes a first delivery pipeline 102a and a second delivery pipeline 102b; a first delivery valve 12a is provided on the first delivery pipeline 102a, and a second delivery valve 12b is provided on the second delivery pipeline 102b; accordingly, the electronic control component includes a first power supply device 13a, a second power supply device 13b, a first one-way current limiting device 14a, and a second one-way current limiting device 14b; the first power supply device 13a is connected to the first delivery valve 12a, and the first power supply device 13a is connected to the main valve 11 through the first one-way current limiting device 14a; the second power supply device 13b is connected to the second delivery valve 12b, and the second power supply device 13b is connected to the main valve 11 through the second one-way current limiting device 14b.

[0050] Among them, the first one-way current limiting device 14a is one of a diode and a relay; the second one-way current limiting device 14b is one of a diode and a relay; the main valve 11 is a normally open valve, and the first delivery valve 12a and the second delivery valve 12b are both normally closed valves.

[0051] For the actual installation of the dispensing assembly in the present application, the electric control component is improved on the basis of providing at least two electric signals to control the dispensing assembly in the prior art. When the improved electric control component is applied to the washing equipment in the prior art, only the existing electric signal control device with two or more electric signals, such as the integrated circuit board or the central controller in the washing equipment, is needed. After the valve bodies are installed on the corresponding pipelines, the power supply device 13 and the one-way current limiting device 14 are electrically connected to the valve bodies, and then the power supply device 13 is electrically connected to the integrated circuit board or the central controller in the washing equipment. No modification is needed for the electric signal control device in the prior art, and the opening and closing of the power supply device 13 can be directly controlled by the electric signal control device in the prior art. Therefore, the dispensing assembly is universal, which is beneficial to improve the assembly convenience of the dispensing assembly.

[0052] For the specific control method of the dispensing assembly, the following steps are included:

[0053] S1, the water supply device 16 is opened;

[0054] At this time, the main valve 11 is in an open state, and the first dispensing valve 12a and the second dispensing valve 12b are both in a closed state. The washing water flows out from the water supply device 16, flows through the main pipeline 101, and flows into the washing part 17, thereby realizing the water inlet process of the washing equipment.

[0055] S2, the power supply device 13 is opened;

[0056] Specifically, the power supply device 13 can be regarded as one of the first power supply device 13a or the second power supply device 13b, and the first power supply device 13a or the second power supply device 13b is opened according to the user's needs or the preset washing mode. If the first power supply device 13a is opened, the first power supply device 13a supplies power to the main valve 11 and the first dispensing valve 12a, so that the main valve 11 is closed and the first dispensing valve 12a is opened. At the same time, due to the current limiting effect of the second one-way current limiting device 14b, the power or electric signal provided by the first power supply device 13a cannot be transmitted to the second power supply device 13b and the second dispensing valve 12b, and cannot interfere with the state of the second power supply device 13b and the second dispensing valve 12b, that is, it can ensure that the second power supply device 13b and the second dispensing valve 12b remain closed. At this time, the washing agent in the washing agent supply device 15 flows into the main pipeline 101 from the first dispensing pipeline 102a, and the washing water in the main pipeline 101 is cut off by the closed main valve 11.

[0057] If the second power supply device 13b needs to be turned on, the second power supply device 13b supplies power to the main path valve 11 and the second dosing valve 12b, so that the main path valve 11 is closed and the second dosing valve 12b is opened. At the same time, due to the flow limiting effect of the first one-way flow limiting device 14a, the power or electrical signal provided by the second power supply device 13b cannot be transmitted to the first power supply device 13a and the first dosing valve 12a, and cannot interfere with the state of the first power supply device 13a and the first dosing valve 12a, that is, it can be ensured that the first power supply device 13a and the first dosing valve 12a remain in a closed state. At this time, the washing agent in the washing agent supply device 15 flows into the main pipeline 101 from the second dosing pipeline 102b, and the washing water in the main pipeline 101 is cut off by the closed main path valve 11.

[0058] S3, closing the power supply device 13;

[0059] It should be noted that the power supply device 13 closed in step S3 is the same device as the power supply device 13 opened in step S2. That is, if the first power supply device 13a is opened in step S2, the first power supply device 13a is also closed in step S3. If the second power supply device 13b is opened in step S2, the second power supply device 13b is also closed in step S3.

[0060] At the same time as step S2, the same as the conventional technology, by judging whether the dosing amount or dosing time of the washing agent reaches the preset value, if the preset value is not reached, the power supply device 13 is kept open, if the preset value is reached, step S3 is performed, the power supply device 13 is closed, at this time the main path valve 11 returns to the open state, the dosing valve 12 returns to the closed state, the washing water reflows into the main pipeline 101, and the washing agent in the main pipeline 101 flows into the washing part 17 together, thereby realizing the dosing of the washing agent.

[0061] S4, closing the water supply device 16;

[0062] After the dosing of the washing agent is completed, the same as the conventional washing equipment, by judging whether the dosing amount or dosing time of the washing water reaches the preset value, if not, the water supply device 16 is kept open, and the water continues to flow; if it is reached, the water supply device 16 is closed, and the water is stopped. After that, the washing equipment can proceed or continue to proceed with the washing process.

[0063] In the present application, on the basis of still maintaining the control of the existing technology at least two-way electrical signal to the delivery assembly, by setting the electromagnetic valve or electric valve easily available on the market on the corresponding pipeline, and setting the one-way current limiting device in the electric control part, on the one hand, it ensures the accurate control of each valve body, avoids the abnormal situation of valve opening and closing caused by the mutual interference of two-way or multi-way electrical signal or the wrong flow direction of electrical signal, on the other hand, compared with the switching valve and two-position three-way valve in the prior art, the price of the electromagnetic valve or electric valve is relatively low, the structure is simpler, it can be more firmly installed on the corresponding pipeline, which is beneficial to improve the reliability and convenience of valve assembly;

[0064] At the same time, the present application does not need to change the electrical signal control device of the existing washing equipment, only needs to install each valve body on the corresponding pipeline, then correspondingly electrically connect the power supply device, the one-way current limiting device and each valve body, and then electrically connect each power supply device with the electrical signal control device in the washing equipment, which can not only ensure the convenience of the assembly of the delivery assembly, but also does not need to separately open the mold production for the assembly structure of the delivery assembly, which is beneficial to reduce the production cost.

[0065] Example 2

[0066] As shown in the accompanying Figure 5 , the accompanying Figure 6 , this embodiment is based on example 1, taking the relay as an example for the one-way current limiting device 14, and further describes the delivery assembly.

[0067] The one-way current limiting device 14 comprises a main body 140, a moving contact 141, a first stationary contact 142, and a second stationary contact 143. The main body 140 is a conventional relay main body, which has a core, a coil, an armature, a spring, and other components. Since the relay main body is a prior art, no further description is given here, and the relay can also be purchased in the market. The present application only further describes the assembly relationship of the one-way current limiting device 14. The moving contact 141 cooperates with the first stationary contact 142 and the second stationary contact 143, respectively. The moving contact 141 is connected with the main body 140. The main body 140 is connected with the power supply device 13. The first stationary contact 142 is connected with the power supply device 13, and is in a parallel relationship with the main body 140. The second stationary contact 143 is connected with the main valve 11. Specifically, for the use of the relay, when the power supply device 13 is not turned on, the moving contact 141, the first stationary contact 142, and the second stationary contact 143 are all in a disconnected state. When the power supply device 13 is turned on, the main body 140 is powered on, and drives the moving contact 141 to move, and the moving contact 141 is attached to the first stationary contact 142 and the second stationary contact 143, respectively, so that a passage is formed between the power supply device 13 and the main valve 11. The current passes from the power supply device 13, through the first stationary contact 142, the moving contact 141, and the second stationary contact 143, to the main valve 11, so that the main valve 11 in the normally open state is closed. At the same time, the power supply device 13 also provides current to the release valve 12, so that the release valve 12 in the normally closed state is opened.

[0068] The above description is only the preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control method of a dispensing assembly, which is communicated with a water supply device (16) and a washing section (17), respectively, characterized in that, The dosing assembly comprises an electric control component, a main pipeline (101) and at least two dosing pipelines (102), the inlet of the main pipeline (101) is connected with a water supply device (16), the outlet of the main pipeline (101) is communicated with a washing part (17), a main pipeline valve (11) is arranged on the main pipeline (101), the inlet of the dosing pipeline (102) is connected with a washing agent supply device (15), the outlet of the dosing pipeline (102) is communicated with the outlet of the main pipeline valve (11), a dosing valve (12) is arranged on the dosing pipeline (102); the electric control component is connected with the main pipeline valve (11) and the dosing valve (12) respectively; The dosing assembly comprises a first dosing pipeline (102a) and a second dosing pipeline (102b), a first dosing valve (12a) is arranged on the first dosing pipeline (102a), a second dosing valve (12b) is arranged on the second dosing pipeline (102b), the electric control component comprises a first power supply device (13a), a second power supply device (13b), a first one-way current limiting device (14a) and a second one-way current limiting device (14b), the first power supply device (13a) is connected with the first dosing valve (12a), the first power supply device (13a) is connected with the main pipeline valve (11) through the first one-way current limiting device (14a), the second power supply device (13b) is connected with the second dosing valve (12b), and the second power supply device (13b) is connected with the main pipeline valve (11) through the second one-way current limiting device (14b); The method comprises: S1, the water supply device (16) is started, the main pipeline valve (11) is in an open state, and the dosing valve (12) is in a closed state; S2, the power supply device (13) is started, the main pipeline valve (11) is closed, the dosing valve (12) is opened, and the dosing of the washing agent is performed; S3, whether the dosing amount or the dosing time of the washing agent reaches a preset value is judged; if not, the step S2 is returned; if yes, the step S4 is performed; S4, the power supply device (13) is closed, the main pipeline valve (11) is restored to the open state, and the dosing valve (12) is restored to the closed state; S5, the water supply device (16) is closed; In step S2, the power supply device (13) is the first power supply device (13a) or the second power supply device (13b); if the first power supply device (13a) is turned on, the first power supply device (13a) supplies power to the main valve (11) and the first dosing valve (12a) respectively, so that the main valve (11) is closed and the first dosing valve (12a) is opened; at the same time, due to the current limiting effect of the second one-way current limiting device (14b), the power or electrical signal provided by the first power supply device (13a) cannot be transmitted to the second power supply device (13b) and the second dosing valve (12b), and cannot interfere with the state of the second power supply device (13b) and the second dosing valve (12b), so as to ensure that the second power supply device (13b) and the second dosing valve (12b) remain closed; at this time, the washing agent in the washing agent supply device (15) flows into the main pipeline (101) from the first dosing pipeline (102a), and the washing water in the main pipeline (101) is cut off by the closed main valve (11); if the second power supply device (13b) is turned on, the second power supply device (13b) supplies power to the main valve (11) and the second dosing valve (12b) respectively, so that the main valve (11) is closed and the second dosing valve (12b) is opened; at the same time, due to the current limiting effect of the first one-way current limiting device (14a), the power or electrical signal provided by the second power supply device (13b) cannot be transmitted to the first power supply device (13a) and the first dosing valve (12a), and cannot interfere with the state of the first power supply device (13a) and the first dosing valve (12a), so as to ensure that the first power supply device (13a) and the first dosing valve (12a) remain closed; at this time, the washing agent in the washing agent supply device (15) flows into the main pipeline (101) from the second dosing pipeline (102b), and the washing water in the main pipeline (101) is cut off by the closed main valve (11).

2. A control method of a drop assembly according to claim 1, wherein The electric control component comprises a power supply device (13) and a one-way current limiting device (14), the power supply device (13) is connected with the dosing valve (12), and the power supply device (13) is connected with the main valve (11) through the one-way current limiting device (14).

3. A control method of a drop assembly according to claim 2, wherein The one-way current limiting device (14) is a diode or a relay.

4. The control method of a drop assembly according to claim 2, wherein The one-way current limiting device (14) comprises a main body (140), a moving contact (141), a first stationary contact (142) and a second stationary contact (143), the moving contact (141) cooperates with the first stationary contact (142) and the second stationary contact (143) respectively, the moving contact (141) is connected with the main body (140), the main body (140) is connected with the power supply device (13), the first stationary contact (142) is connected with the power supply device (13), and the first stationary contact (142) and the main body (140) are connected in parallel, and the second stationary contact (143) is connected with the main valve (11).

5. The method of claim 1, wherein, The main valve (11) is an electromagnetic valve or an electric valve, and the dosing valve (12) is an electromagnetic valve or an electric valve.

6. The method of claim 1, wherein, The main valve (11) is a normally open valve, and the dosing valve (12) is a normally closed valve.

7. The method of claim 1, wherein, The first one-way current limiting device (14a) is a diode or a relay; the second one-way current limiting device (14b) is a diode or a relay; the main valve (11) is a normally open valve, and the first delivery valve (12a) and the second delivery valve (12b) are both normally closed valves.

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