Detergent dispenser assembly

Abstract

A detergent dispenser assembly with a constant automatic detergent extraction speed, wherein a water outlet (11), a suction port (12) and a water inlet (13) are provided on a water channel body (1), a water delivery channel coaxial with the water inlet is provided on one side of the water delivery channel and vertically connected to the water delivery channel, the outlet end of the water delivery channel is connected to a venturi tube (2) via an inlet (21) connected to the venturi tube, the negative pressure port (22) of the venturi tube is connected to the suction port, the outlet (23) of the venturi tube is connected to the water outlet, the water delivery channel is coaxially connected to a pressure relief channel, a pressure relief valve composed of a pressure relief valve seat, a pressure relief valve core (3) and a spring (4) is provided in the pressure relief channel, and the outlet of the pressure relief channel is connected to a discharge channel (15). The present invention is suitable for dispensing detergent in washing machines.

Description

Technical Field

[0001] The present invention relates to a detergent dispenser for a washing machine, in particular to an assembly of a detergent dispenser for a washing machine. Background Art

[0002] The washing machine automatically dispenses detergent as water is flowing in, and the detergent is fed into the washing tub together with the water flow, which is an existing technical application. Figure 1 As shown, a venturi tube 2 is arranged in a longitudinal section of the water inlet channel of the water channel body 1, the inlet 21 of the venturi tube is located in the direction of the water inlet 13 of the water channel body, the outlet 23 of the venturi tube is located in the direction of the water outlet of the water channel body, and the negative pressure port 22 of the venturi tube is connected with the suction port 12 of the water channel body. When water is inletted, the negative pressure port 22 of the venturi tube 2 generates negative pressure to cause the suction port 12 to generate negative pressure, and the detergent in the detergent box is sucked into the water channel and input into the washing bucket. In the water flow channel that determines the pipe diameter and determines the water pressure (water pressure difference), the water flow rate (the amount of water passing through per unit time) is proportional to the water flow rate (the displacement of the water flow particle per unit time), and the water pressure is proportional to the square of the water flow rate. Since the water supply pressure will change, the water flow rate through the venturi tube will change. The change in water flow rate will cause the negative pressure generated by the venturi tube to change. The change in negative pressure will cause the detergent suction speed to change. Therefore, it is inaccurate to use a limited suction time to quantify the amount of detergent to be added. Within a limited time, the amount of detergent added will be large when the water pressure is high, and the amount of detergent added will be small when the water pressure is low. Under the premise of setting a minimum water pressure, the detergent extraction time and the amount of detergent extracted can be determined. When the water pressure increases, the pressure is released to eliminate the increase, and the water flow rate through the venturi tube is kept unchanged or changes within a negligible design error range. The amount of detergent to be extracted can be determined by the extraction time. Figure 1As shown, the existing technology measures to relieve pressure and eliminate the increase of water pressure are to set a pressure relief branch perpendicular to the water conveying channel on one side of the water conveying channel coaxial with the venturi tube in the direction of the venturi tube inlet, and the pressure relief valve composed of the main body pressure relief valve seat 14, the pressure relief valve core 3 and the spring 4 is provided in the pressure relief branch, and the valve flap 31 of the pressure relief valve core corresponds to the main body pressure relief valve seat 14. Under normal water pressure (no increase in water pressure), under the action of the spring 4, the valve flap 31 is sealed to the main body pressure relief valve seat 14. When the water pressure increases, the pressure of the pressure relief valve core 3 increases, overcoming the elastic force of the spring 4 to compress the spring 4, and the valve flap 31 leaves the main body pressure relief valve seat 14. A part of the water in the water conveying channel flows into the discharge channel 14 through the pressure relief branch, and the water flow rate flowing through the venturi tube is kept unchanged or changes within a negligible control error range. However, the actual situation of this structural component is that when the water pressure in the water supply channel increases, the amount of water flowing through the pressure relief branch is not enough to eliminate the increase in water pressure. The water pressure at the inlet end of the venturi tube is still too high, causing the water flow rate through the venturi tube to be too high, the negative pressure value to be too high, and the amount of detergent extracted per unit time to be too high. The pre-set time-based measurement of detergent delivery is inaccurate. Therefore, the prior art for measuring detergent delivery requires the configuration of a flow meter, which results in complex equipment structure and increased costs.

[0003] In this device that uses a venturi tube as a power source for extracting detergent, a pressure relief valve is provided to eliminate the increase in water pressure, thereby maintaining a constant water flow rate through the venturi tube, thereby eliminating the need for a flow meter to measure the amount of detergent added. No products have been launched on the market in the prior art, and no related reports have been seen. Summary of the invention

[0004] The present invention aims to solve the problem of complex structure and high cost caused by the need to configure a flow meter to measure the detergent dosage in the water delivery and detergent dosage device with a venturi tube in the prior art. To this end, the present invention provides a detergent dispenser assembly, which does not need to be configured with a flow meter and can measure the detergent dosage through electronic timing, thereby simplifying the equipment structure and reducing costs.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is that a water outlet, a suction port and a water inlet are provided on the water channel body. The special feature is that a water delivery channel coaxial with the water inlet is provided on one side of the water delivery channel and vertically connected to the water delivery channel. The outlet end of the water delivery branch channel is connected to the Venturi tube via the inlet of the Venturi tube, the negative pressure port of the Venturi tube is connected to the suction port, and the outlet of the Venturi tube is connected to the water outlet. The water delivery channel is coaxially connected to a pressure relief channel, and a pressure relief valve composed of a pressure relief valve seat, a pressure relief valve core and a spring is provided in the pressure relief channel. The outlet of the pressure relief channel is connected to a discharge channel.

[0006] A suitable solution is that the pressure relief valve seat is a main body pressure relief valve seat provided in the waterway body, and the pressure relief channel is located such that the inlet of the water delivery branch channel is located between the water inlet and the pressure relief channel.

[0007] Another suitable solution is that a sleeve with open ends connected to the water channel body is provided in the water transfer channel, and the port of the sleeve corresponding to the water inlet direction is set as a vacuum breaking valve seat, and a hollow vacuum breaking valve core is provided in the sleeve, and the valve flap of the vacuum breaking valve core corresponds to the vacuum breaking valve seat, the pressure relief valve core and the spring are arranged in the vacuum breaking valve core, and the pressure relief valve seat is a valve core pressure relief valve seat arranged in the vacuum breaking valve core.

[0008] The detergent of the present invention is a liquid detergent.

[0009] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is an outline diagram of a detergent dispenser assembly in the prior art;

[0011] Figure 2 is an outline diagram of a detergent assembly of the present invention;

[0012] Figure 3 yes Figure 1 AA section view;

[0013] Figure 4 yes Figure 2 AA section view;

[0014] Figure 5 is a view of a detergent dispenser using the present invention;

[0015] Figure 6 yes Figure 5 AA section view;

[0016] Figure 7 yes Figure 6 Enlarged view of point F in the middle.

[0017] Markings and corresponding parts in the figure: 1 water channel body, 11 water outlet, 12 suction port, 13 water inlet, 14 body pressure relief valve seat, 15 discharge channel, 16 vacuum breaking valve seat, 2 Venturi tube, 21 inlet, 22 negative pressure port, 23 outlet, 3 pressure relief valve core, 4 spring, 5 vacuum breaking valve core, 51 valve core pressure relief valve seat. DETAILED DESCRIPTION

[0018] Embodiment 1

[0019] A detergent dispenser assembly, see Figure 4A water outlet 11, a suction port 12 and a water inlet 13 are provided on the water channel body 1. A water delivery branch channel which is coaxial with the water inlet 13 is provided on one side of the water delivery channel which is perpendicular to the water delivery channel. The outlet end of the water delivery branch channel is connected to the Venturi tube 2 via an inlet 21 connected to the Venturi tube 2. The negative pressure port 22 of the Venturi tube is connected to the suction port 12. The outlet 23 of the Venturi tube is connected to the water outlet 11. A pressure relief channel is connected to the water delivery channel in a coaxial direction. A pressure relief valve composed of a main body pressure relief valve seat 14, a pressure relief valve core 3 and a spring 4 is provided in the pressure relief channel. The pressure relief channel is located in a position where the inlet of the water delivery branch channel is located between the water inlet 13 and the pressure relief channel. The outlet of the pressure relief channel is connected to a discharge channel 15.

[0020] When the water supply pressure increases, the pressure on the pressure relief valve core 3 increases, pushing and compressing the spring 4, the pressure relief valve opens, and the pressure relief water is discharged from the discharge channel 15, keeping the water flow rate through the venturi tube 2 constant.

[0021] The present invention is further described below with reference to the prior art.

[0022] Setting a venturi tube in the coaxial direction of the water delivery channel as a power source for extracting detergent is an energy-saving, efficient and cost-saving technical solution. When the water supply pressure changes, the negative pressure value generated by the venturi tube changes, causing the detergent extraction speed to change. Therefore, the amount of detergent extracted cannot be measured by electronic timing methods. It is necessary to set up a meter such as a flow meter in the system to measure the amount of detergent added. In order to avoid the need for a meter, the industry proposes to set a pressure relief channel and a pressure relief valve vertically through one side of the water delivery channel, such as Figure 3 When the water supply pressure exceeds a certain value, the pressure relief valve opens to keep the water flow rate through the venturi tube constant, so that the amount of detergent can be measured by electronic timing, but the actual result is that this solution has little effect.

[0023] From the perspective of fluid dynamics, water generates head loss during its flow, also known as pressure head loss, or pressure loss. Head loss is divided into along-the-way loss and local loss. This case involves local head loss. Local head loss is caused by the sudden discontinuous change of the water flow boundary, and the water flow inertia causes the water flow to separate from the wall surface, and the sudden change of the water flow bend or section is the cause of local head loss. This case involves a water flow bend, that is, the water flow bends.

[0024] See Figure 3, assuming that the water pressure increase at the water inlet is ΔP, the water pressure increase at the water delivery channel entering the venturi tube is ΔP1, and the water pressure increase at the pressure relief channel is ΔP2. Under static conditions, ΔP2=ΔP1=ΔP. Under dynamic water flow, due to the bending of the water flow entering the pressure relief channel, local head loss is generated, and no local head loss is generated when entering the venturi tube. At this time, ΔP2<ΔP1<ΔP. Since ΔP2<ΔP1, the possible results are: one is that the water pressure increases but ΔP2 is not enough to open the pressure relief valve, and the other is that the pressure relief valve is opened but the pressure relief effect is small. In this way, the water flow velocity of the venturi tube cannot be guaranteed to be constant.

[0025] See Figure 4 Similarly, since ΔP1>ΔP2, the pressure relief of the pressure relief channel has a great effect on reducing the water pressure flowing through the Venturi tube, which can keep the water flow velocity of the Venturi tube constant, thereby maintaining a constant negative pressure value, thereby obtaining a constant detergent extraction speed. In this way, the amount of detergent added can be measured by electronic timing, without the need for a flow meter, which simplifies the equipment structure and saves costs.

[0026] Embodiment 2

[0027] See also Figure 7 This example is different from the previous example in that a sleeve 16 with two ends connected to the water channel body 1 is provided in the water delivery channel, and the port of the sleeve corresponding to the water inlet 12 is set as a vacuum breaking valve seat 161. A hollow vacuum breaking valve core 5 is provided in the sleeve 16, and the valve disc of the vacuum breaking valve core corresponds to the vacuum breaking valve seat 161. The pressure relief valve core 3 and the spring 4 are arranged in the vacuum breaking valve core 5, and the body pressure relief valve seat 14 in the previous example is replaced by a valve core pressure relief valve seat 51 arranged in the vacuum breaking valve core 5.

[0028] When water enters, the vacuum breaking valve core 5 closes the vacuum breaking valve seat 116 under the action of water pressure, and water is discharged through the venturi tube 2. When the water pressure increases, the pressure relief valve core 3 compresses the spring 4 to release pressure and keep the water flow rate of the venturi tube constant. When negative pressure appears in the pipeline in the direction of the water inlet 12, the vacuum breaking valve core 5 is pushed by the atmospheric pressure to leave the vacuum breaking valve seat 16 and enter the air, so that the vacuum is destroyed and the unclean water in the pipeline in the direction of the water outlet is prevented from entering the water supply pipeline. The negative pressure and vacuum are the same concept, which means that the gas pressure in the system is less than the atmospheric pressure.

Claims

1. A detergent dispenser assembly, wherein a water channel body (1) is provided with a water outlet (11), a suction port (12) and a water inlet (13), wherein the ... outlet (11) is provided with a water channel body (1) and the water inlet (13) is provided with a water channel body (1) and the water inlet (13) is provided with a A water delivery branch channel is provided on one side of the water delivery channel coaxial with the water inlet and vertically communicated with the water delivery channel. The outlet end of the water delivery branch channel is connected to a venturi tube (2) via an inlet (21) connected to the venturi tube. The negative pressure port (22) of the venturi tube communicates with the suction port. The outlet (23) of the venturi tube communicates with the water outlet. A pressure relief channel is connected to the water delivery channel coaxially. A pressure relief valve composed of a pressure relief valve seat, a pressure relief valve core (3) and a spring (4) is provided in the pressure relief channel. The outlet of the pressure relief channel is connected to a discharge channel (15).

2. A detergent dispenser assembly as claimed in claim 1, characterized in that The pressure relief valve seat is a main body pressure relief valve seat (14) arranged in the waterway body, and the pressure relief channel is located at a position where the inlet of the water delivery branch channel is located between the water inlet and the pressure relief channel.

3. A detergent dispenser assembly as claimed in claim 1, characterized in that The water conveying channel is provided with a sleeve (16) connected to the water channel body and opened at both ends. The port of the sleeve corresponding to the water inlet direction is provided as a vacuum breaking valve seat (161). A hollow vacuum breaking valve core (5) is provided in the sleeve. The valve flap of the vacuum breaking valve core corresponds to the vacuum breaking valve seat. The pressure relief valve core and the spring are provided in the vacuum breaking valve core. The pressure relief valve seat is a valve core pressure relief valve seat (51) provided in the vacuum breaking valve core.

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