Water pump emptying structure

Abstract

The utility model discloses a water pump emptying structure, including water tank (1), water pump (2), its suction water mouth and water tank (1) water supply end intercommunication and emptying valve (3), its water inlet and water pump (2) water outlet intercommunication, its reflux end and water tank (1) backwater end intercommunication, its characterized in that: still including water gas separation valve (4), the inside of water gas separation valve (4) has water gas separation chamber (40), and the lower part and the upper part of water gas separation valve (4) have water outlet (41) and air outlet (42) respectively, the reflux end of emptying valve (3) and water gas separation chamber (40) intercommunication, water outlet (41) and water tank (1) backwater end intercommunication, air outlet (42) and outside atmosphere intercommunication. Compared with prior art, the water pump emptying structure of the utility model can avoid the influence of water pump and emptying valve's efficiency and will not produce waste water.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, specifically to a water pump venting structure. Background Technology

[0002] A coffee machine, as a beverage extraction device, mainly consists of an extraction section for preparing coffee and a pressurized water supply section for providing hot water to the extraction section. The extraction section uses high temperature and high pressure to achieve a better brewing effect. The pressurized water supply section mainly includes a water tank assembly, a water pump, a one-way valve, and a boiler connected in sequence. A safety pressure relief channel is also provided between the boiler and the water tank. When preparing coffee, if the pressure inside the boiler is insufficient, the water pump starts, drawing water from the water tank to open the one-way valve and inject it into the boiler for heating. When the water pressure inside the boiler rises due to heating and exceeds the set upper limit, the water flows back to the water tank through the safety pressure relief channel.

[0003] When a water pump is used for the first time or after being shut down for a period of time, it may experience dry running, which can lead to problems such as the inability to pump water and difficulty in expelling air from the pump itself. This is especially true when there is pressure in the boiler, which may damage the water pump due to the inability to pump water for an extended period of time.

[0004] To address this, Chinese patent application CN202421415870.0, entitled "An Air Vent Valve," describes an air vent valve core assembly consisting of a valve core seat and an umbrella-shaped valve core. When the water pump experiences air evacuation, the inlet pressure of the inlet channel is less than the first preset pressure. Under its own elastic force, the umbrella part of the umbrella-shaped valve core releases the pressure on the flow groove, allowing the air inside the water pump to be quickly discharged through the flow groove and flow hole of the valve core seat. Once the air is discharged, the water pump returns to normal operation.

[0005] However, for the water pumps currently on the market with vent valves, there are two ways to recover the water-air mixture generated during venting: The first is to return it to the water tank. Every time the water pump starts, it needs to expel the air from the return pipe. When the water tank is full, a certain negative pressure will be generated in the return pipe. This negative pressure creates great resistance to the water pump and vent valve, causing many water pumps to stop and start at the moment of restarting. The water pump and vent valve lose or weaken their venting capacity, resulting in slow or continuous water pumping, which seriously affects the efficiency of the water pump and vent valve. The second method is to connect it to a wastewater box. This method does not have the negative pressure effect, but it will continuously generate a large amount of wastewater that cannot be resolved. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a water pump venting structure that can avoid affecting the efficiency of the water pump and the venting valve and will not produce wastewater, in light of the current state of the technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a water pump venting structure, including a water tank, having a water supply end and a water return end;

[0008] A water pump, having an inlet and an outlet, is capable of transporting water from the inlet to the outlet. The inlet of the water pump is connected to the water supply end of the water tank.

[0009] The drain valve has an inlet end for water to enter, an outlet end for water to enter, and a return end for water-air mixture to exit. The inlet end of the drain valve is connected to the drain port of the water pump, and the return end of the drain valve is connected to the return end of the water tank.

[0010] The feature is that it further includes a water-air separation valve, which has a water-air separation chamber inside, and the lower and upper parts of the water-air separation valve have a water outlet and an air outlet that communicate with the water-air separation chamber, respectively. The return end of the vent valve is connected to the water-air separation chamber, the water outlet is connected to the return end of the water tank, and the air outlet is connected to the outside atmosphere.

[0011] To prevent the liquid in the water tank from flowing back into the water-air separation chamber under hydraulic pressure and overflowing through the air outlet, the water-air separation valve is positioned above the liquid level in the water tank.

[0012] To simplify the structure of the water-gas separator valve, the water-gas separator valve is a hollow box, and the inner cavity of the box forms the water-gas separation chamber.

[0013] To prevent air and water from interfering with each other during the discharge process, the water outlet and air outlet are respectively located on the bottom and top walls of the housing.

[0014] To facilitate the connection between the return end of the vent valve and the water-gas separation chamber, the return end of the vent valve is connected to the water-gas separation chamber through a return pipe.

[0015] To prevent the water-air mixture from entering and affecting the water-air separation, the outlet end of the reflux pipe extends into the upper part of the water-air separation chamber.

[0016] To facilitate the connection between the water outlet and the water tank's return end, the water outlet is connected to the water tank's return end via a return pipe.

[0017] To facilitate the connection between the water pump's suction port and the water tank's supply end, the water pump's suction port is connected to the water tank's supply end via an inlet pipe.

[0018] Compared with the prior art, the advantages of this utility model are as follows: by adding a water-air separation valve to the return water pipeline between the drain valve and the water tank, when the water pump starts, the water-air mixture enters the drain valve and then enters the water-air separation chamber to be separated into air and water. The air in the upper part is discharged to the outside atmosphere through the air outlet, and the water in the lower part returns to the water tank through the water outlet. In this way, on the one hand, no air will remain in the return water pipeline, and since there is no negative pressure, the efficiency of the water pump and the drain valve will not be affected. On the other hand, the water is recycled back to the water tank, and no wastewater is generated. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an embodiment of the pump venting structure of this utility model (arrows indicate the direction of fluid flow). Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0022] like Figure 1 The diagram shows a preferred embodiment of the water pump venting structure of this utility model. The water pump venting structure includes a water tank 1, a water pump 2, a venting valve 3, and a water-air separation valve 4.

[0023] The bottom of water tank 1 has a water supply end and a water return end.

[0024] The water pump 2 has a suction port and a discharge port, and can transport water from the suction port to the discharge port. Specifically, the suction port of the water pump 2 is connected to the water supply end of the water tank 1 through the water inlet pipe 21.

[0025] The vent valve 3 has an inlet for water supply, an outlet for water supply, and a return outlet for the water-air mixture. Specifically, the inlet of the vent valve 3 is directly connected to the drain port of the water pump 2; the outlet of the vent valve 3 is connected to an external boiler via an outlet pipe 31. The specific structure of the vent valve 3 can be found in the background patent and will not be described further here.

[0026] The water-air separator valve 4 is a hollow box 1. The inner cavity of this box 1 forms a water-air separator chamber 40. The bottom and top walls of the box are respectively provided with a water outlet 41 and an air outlet 42 that communicate with the water-air separator chamber 40. Specifically, the return end of the drain valve 3 is connected to the water-air separator chamber 40 via a return pipe 32, and the outlet end of the return pipe 32 extends into the upper part of the water-air separator chamber 40. The water outlet 41 is connected to the return end of the water tank 1 via a return water pipe 411. The air outlet 42 is connected to the outside atmosphere. In this embodiment, the water-air separator valve 4 is higher than the liquid level in the water tank 1, thereby preventing the liquid in the water tank 1 from flowing back into the water-air separator chamber 40 through the return water pipe 411 and overflowing through the air outlet 42 under hydraulic pressure.

[0027] The working principle of this embodiment is as follows: When the water pump 2 starts, the water-air mixture enters the vent valve 3 and then enters the water-air separation chamber 40 through the return pipe 32, where it is separated into air and water. The air in the upper part is discharged to the outside atmosphere through the air outlet 42, and the water in the lower part returns to the water tank 1 through the water outlet 41 and the return water pipe 411. In this way, no air will remain in the return water pipe 411, and since there is no negative pressure, it will not affect the efficiency of the water pump and the vent valve. Actual tests show that it has a high auxiliary venting effect.

Claims

1. A water pump venting structure, comprising: Water tank (1) has a water supply end and a water return end; A water pump (2) having a suction port and a discharge port, capable of conveying water from the suction port to the discharge port, the suction port of the water pump (2) being connected to the water supply end of the water tank (1); and The drain valve (3) has an inlet end for water to flow in, an outlet end for water to flow in, and a return end for water-air mixture to be discharged. The inlet end of the drain valve (3) is connected to the drain port of the water pump (2), and the return end of the drain valve (3) is connected to the return end of the water tank (1). Its features are: It also includes a water-air separation valve (4), which has a water-air separation chamber (40) inside. The lower and upper parts of the water-air separation valve (4) have a water outlet (41) and an air outlet (42) that communicate with the water-air separation chamber (40), respectively. The return end of the vent valve (3) is connected to the water-air separation chamber (40), the water outlet (41) is connected to the return end of the water tank (1), and the air outlet (42) is connected to the outside atmosphere.

2. The water pump venting structure according to claim 1, characterized in that: The water-air separation valve (4) is higher than the liquid level in the water tank (1).

3. The water pump venting structure according to claim 1, characterized in that: The water-air separation valve (4) is a hollow box, and the inner cavity of the box forms the water-air separation chamber (40).

4. The water pump venting structure according to claim 3, characterized in that: The water outlet (41) and air outlet (42) are respectively located on the bottom wall and top wall of the box.

5. The water pump venting structure according to claim 1, characterized in that: The return end of the vent valve (3) is connected to the water-air separation chamber (40) through the return pipe (32).

6. The water pump venting structure according to claim 5, characterized in that: The outlet end of the return pipe (32) extends into the upper part of the water-air separation chamber (40).

7. The water pump venting structure according to claim 1, characterized in that: The outlet (41) is connected to the return end of the water tank (1) through the return pipe (411).

8. The water pump venting structure according to any one of claims 1 to 7, characterized in that: The suction port of the water pump (2) is connected to the water supply end of the water tank (1) through the water inlet pipe (21).

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