EP4187098A1

EP4187098A1 - Water pump, cold water storage tank and water dispenser

Info

Publication number: EP4187098A1
Application number: EP22189671.5A
Authority: EP
Inventors: Yifan XIE; Chaoze Xiong; Xiaohong Wang
Original assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Priority date: 2021-11-30
Filing date: 2022-08-10
Publication date: 2023-05-31

Abstract

Disclosed are a water pump, a cold water storage tank and a water dispenser. The water pump includes a pump body, a pump head, an isolation shell and an impeller assembly. The pump body includes a drive assembly. The pump head includes a water inlet pipe and a water outlet pipe communicating with the water inlet pipe. The isolation shell is provided between the pump body and the pump head. The impeller assembly is provided in the water inlet pipe. The drive assembly is magnetically connected to the impeller assembly to drive the impeller assembly to rotate in the water inlet pipe.

Description

TECHNICAL FIELD

The present disclosure relates to the technical field of electrical equipment, and in particular to a water pump, a cold water storage tank and a water dispenser.

BACKGROUND

During pumping of an existing water pump, water will penetrate into the pump body through the gaps on the pump body, and the water infiltrated into the pump body will corrode the internal components of the pump body, causing the water pump to fail and reducing the life of the water pump.

SUMMARY

The main objective of the present disclosure is to provide a water pump, a cold water storage tank and a water dispenser, which aims to solve the technical problem that the inside of the pump body is easy to seep water, causing the failure of the water pump.
In order to achieve the above objective, the present disclosure provides a water pump, including:

a pump body including a drive assembly;
a pump head including a water inlet pipe and a water outlet pipe communicating with the water inlet pipe;
an isolation shell provided between the pump body and the pump head; and
an impeller assembly provided in the water inlet pipe, the drive assembly is magnetically connected to the impeller assembly to drive the impeller assembly to rotate in the water inlet pipe.

In an embodiment, the isolation shell is provided with a first end and a second end, the first end and the second end are located at opposite sides of the isolation shell, the drive assembly includes a rotor and a first magnet, the impeller assembly includes a hub and a second magnet, the rotor is rotatably connected to the first end, the hub is rotatably connected to the second end, and the impeller assembly is magnetically connected to the drive assembly through the first magnet and the second magnet.
In an embodiment, the pump body includes a casing, the drive assembly is arranged in the casing, and the isolation shell is arranged at an opening of the casing.
In an embodiment, the water inlet pipe extends from the isolation shell, an end of the water inlet pipe distant form the isolation shell is provided with a water inlet, and the water outlet pipe is in communication with an end of the water inlet pipe adjacent to the isolation shell.
In an embodiment, the water outlet pipe and the water inlet pipe extend in a same direction, and an angle is formed between a water outlet of the water outlet pipe and the water inlet pipe.
The present disclosure provides a cold water storage tank, including:

a box body; and
the water pump, the water inlet pipe of the pump head of the water pump extends to a first position of the box body, the pump body of the water pump is located at a second position of the box body, the first position is below the second position, and the first position is below a highest water level of the box body.

In an embodiment, the cold water storage tank further includes:
a tank cover, the pump body of the water pump is mounted on the tank cover, and the pump head is located inside the tank cover to extend toward the tank body to the first position.
The present disclosure further provides a water dispenser, including:

a heat exchange system;
a cold water storage tank, an evaporator in the heat exchange system being provided in the box body of the cold water storage tank.

In an embodiment, the water dispenser further includes a water supply system for supplying water to the cold water storage tank; the box body is provide with a water level detector, the water level detector is provided between the first position of the box body and the second position of the box body, the water level detector is configured to send a detected water level signal to the water supply system to trigger the water supply system to stop supplying water to the cold water storage tank.
The embodiments of the present disclosure provide a water pump, a cold water storage tank and a water dispenser, which have at least the following technical effects or advantages.
The water pump of the present disclosure includes a pump body, a pump head, an isolation shell and an impeller assembly. The pump head includes a water inlet pipe and a water outlet pipe communicating with the water inlet pipe. The isolation shell is provided between the pump body and the pump head. The space where the pump body and the pump head are located is divided into two spaces which are not communicated with each other. The impeller assembly is provided in the water inlet pipe. The drive assembly is magnetically connected to the impeller assembly to drive the impeller assembly to rotate in the water inlet pipe. When using the water pump of the present disclosure to pump water, it is not necessary to put the whole water pump into the water, the pump body and the isolation shell are exposed outside the water, and the pump head is put into the water. When the drive assembly rotates, the impeller assembly rotates in the water inlet pipe through the action of magnetic force, to realize the pumping of water pump, and solve the technical problem of easy water seepage inside the pump body, which leads to the failure of the water pump. Due to the separation effect of the isolation shell, the water cannot pass through the isolation shell, and the water flowing in the pump head cannot enter the pump body from the pump head. Therefore, the water in the pump head can be prevented from entering the inside of the pump body, which plays a waterproof role, prevents the drive assembly and other components in the pump body from being corroded by water, and is beneficial to prolong the service life of the water pump.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural view of a water pump according to an embodiment of the present disclosure.
FIG. 2 is an exploded schematic view of a water pump according to an embodiment of the present disclosure.
FIG. 3 is an internal schematic structural view of a water inlet pipe according to an embodiment of the present disclosure.
FIG. 4 is an external schematic structural view of a cold water storage tank according to an embodiment of the present disclosure.
FIG. 5 is an internal schematic structural view of a cold water storage tank according to an embodiment of the present disclosure.
FIG. 6 is an internal schematic structural view of a cold water storage tank according to another embodiment of the present disclosure.
FIG. 7 is a schematic diagram of a water inlet pipe and a water outlet pipe according to an embodiment of the present disclosure.

Description of reference signs

Reference sign	Name	Reference sign	Name
water pump
	100	isolation shell	130
pump body	110	first end	131
drive assembly	111	second end	132
rotor	112	impeller assembly	140
first magnet	113	hub	141
pump head	120	second magnet	142
water inlet pipe	121	cold water storage tank	200
water inlet	1211	box body	210
water outlet pipe	122	tank cover	220
water outlet	1221	water level detector	230

The realization of the objective, functional characteristics, and advantages of the present disclosure are further described with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE EMBODIMENTS

It should be noted that if there is a directional indication (such as up, down, left, right, front, rear...) in the embodiments of the present disclosure, the directional indication is only used to explain the relative positional relationship, movement, etc. of the components in a certain posture (as shown in the drawings). If the specific posture changes, the directional indication will change accordingly.
In the present disclosure, unless otherwise clearly specified and limited, the terms "connected", "fixed", etc. should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or a whole; can be a mechanical connection or an electrical connection; may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication between two elements or the interaction relationship between two elements, unless specifically defined otherwise. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood according to specific circumstances.
It should be noted that, the descriptions associated with, e.g., "first" and "second," in the present disclosure are merely for descriptive purposes, and cannot be understood as indicating or suggesting relative importance or impliedly indicating the number of the indicated technical feature. Therefore, the feature associated with "first" or "second" can expressly or impliedly include at least one such feature. Besides, the meaning of "and/or" appearing in the disclosure includes three parallel scenarios. For example, "A and/or B" includes only A, or only B, or both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the realization of those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist, nor is it within the scope of the present disclosure.
Based on the function of the water pump, the water pump can be used to pump water, transport water and some special liquids. Usually when using a water pump (such as a submersible pump) to pump water, it is often necessary to completely submerge the water pump. If the pump is immersed in water for a long time, the pump body of the water pump will continue to heat up, and the heated pump body will repeatedly expand and contract when it encounters low-temperature water. In the case of repeated thermal expansion and contraction of the pump body, it is possible to produce gaps in the sealing structure of the water pump, and water will penetrate into the interior of the water pump through the gaps. Over time, the internal components of the water pump will be corroded. For example, the rotor, the stator and other components of the motor will be corroded by water, which will lead to the failure of the water pump and seriously affect the service life of the water pump. Therefore, the embodiment of the present disclosure provides a water pump, which can solve the technical problem that the inside of the pump body is easy to seep water, causing the failure of the water pump. Thus, it is possible to pump water and drive static water to flow without submerging the entire water pump in water.
The present disclosure provides a water pump.
As shown in FIG. 1 to FIG. 3, FIG. 1 is a schematic structural view of a water pump according to an embodiment of the present disclosure. FIG. 2 is an exploded schematic view of the water pump according to an embodiment of the present disclosure. FIG. 3 is an internal schematic structural view of a water inlet pipe according to an embodiment of the present disclosure.
As shown in FIG. 1 to FIG. 3, a water pump 100 includes a pump body 110, a pump head 120, an isolation shell 130 and an impeller assembly 140. The pump body 110 includes a drive assembly 111. The pump head 120 includes a water inlet pipe 121 and a water outlet pipe 122 communicating with the water inlet pipe 121. When the water outside the water pump 100 enters the water inlet pipe 121, the water flows through the water inlet pipe 121, then flows into the water outlet pipe 122, and then flows out through the water outlet pipe 122. The isolation shell 130 is provided between the pump body 110 and the pump head 120, and the body of the isolation shell 130 is airtight and has no gap. The isolation shell 130 separates the space where the pump body 110 and the pump head 120 are located into two spaces which are not communicated with each other. It can be understood that the space where the pump body 110 and the pump head 120 are located is separated by the isolation shell 130 into two independent spaces. In an embodiment, after the space where the pump body 110 and the pump head 120 are located is separated by the isolation shell 130, the space where the pump body 110 is located is called the first space, and the space where the pump head 120 is located is called the second space. The liquid or gas cannot enter the second space from the first space, or the liquid or gas cannot enter the first space from the second space. The impeller assembly 140 is disposed in the water inlet pipe 121, and the drive assembly 111 is magnetically connected to the impeller assembly 140 to drive the impeller assembly 140 to rotate in the water inlet pipe 121. Since the space where the pump body 110 and the pump head 120 are located is divided by the isolation shell 130 into two spaces which are not communicated with each other, the drive assembly 111 is magnetically connected to the impeller assembly 140, and in the case where the drive assembly 111 and the impeller assembly 140 are not connected by an adapter, when the drive assembly 111 rotates, the impeller assembly 140 is rotated in the water inlet pipe 121 under the action of the magnetic force, that is, under the action of the magnetic force, the impeller assembly 140 can be controlled to rotate in the water inlet pipe 121 without the drive assembly 111 and the impeller assembly 140 being in contact.
In this embodiment, when using the water pump 100 to pump water, it is not necessary to put the whole water pump 100 into the water, the pump body 110 and the isolation shell 130 are exposed outside the water, and the pump head 120 is put into the water. The working processes of the water pump 100 are as follows. The water pump 100 turns on, the drive assembly 111 rotates. Under the action of the magnetic force, the drive assembly 111 drives the impeller assembly 140 to rotate in the water inlet pipe 121. When the impeller assembly 140 rotates in the water inlet pipe 121, turbine force and centrifugal force are generated. The turbine force generated by the impeller assembly 140 will suck water into the water inlet pipe 121. The centrifugal force generated by the impeller assembly 140 drives the water entering the water inlet pipe 121 from the water inlet pipe 121 to the water outlet pipe 122, and then discharges the water from the water outlet pipe 122, to realize the water pumping by the water pump 100. Due to the separation effect of the isolation shell 130, the water cannot pass through the isolation shell 130, and during the pumping of the water pump 100, the water flowing in the pump head 120 cannot enter the pump body 110 from the pump head 120. Therefore, the water in the pump head 120 can be prevented from entering the inside of the pump body 110, which plays a waterproof role, prevents the drive assembly 111 and other components in the pump body 110 from being corroded by water, and is beneficial to prolong the service life of the water pump 100.
Further, as shown in FIG. 2, the isolation shell 130 is provided with a first end 131 and a second end 132. The first end 131 and the second end 132 are located at opposite sides of the isolation shell 130. The drive assembly 111 includes a rotor 112 and a first magnet 113. The impeller assembly 140 includes a hub 141 and a second magnet 142. The rotor 112 is rotatably connected to the first end 131. The hub 141 is rotatably connected to the second end 132. The impeller assembly 140 is magnetically connected to the drive assembly 111 through the first magnet 113 and the second magnet 142.
The drive assembly 111 is a drive motor, and the drive motor may be a brushless motor. The drive assembly 111 also includes a control board and a stator. The control board controls the stator to generate a rotating magnetic field, and the rotor 112 rotates under the action of the rotating magnetic field. The rotor 112 is rotatably connected to the first end 131 and the hub 141 is rotatably connected to the second end 132. It can be understood that the rotor 112 is sleeved on the first end 131, the hub 141 is sleeved on the second end 132, and the rotor 112 rotates around the first end 131. The hub 141 rotates around the second end 132, the first end 131 and the second end 132 do not rotate. Both the first end 131 and the second end 132 are a connection shaft, referred to as the first connection shaft and the second connection shaft. The first connection shaft and the second connection shaft are integrated with the isolation shell 130, and all are parts of the isolation shell 130. The rotor 112 rotates around the first connection shaft, and the hub 141 rotates around the second connection shaft. The first magnet 113 is provided on the side of the rotor 112 adjacent to the isolation shell 130, and the second magnet 142 is provided on the side of the hub 141 adjacent to the isolation shell 130. It can be understood that the first magnet 113 is also sleeved on the first end 131 and is fixedly connected to the rotor 112, and the second magnet 142 is also sleeved on the second end 132 and is fixedly connected to the hub 141.
The polarity of the first magnet 113 adjacent to the isolation shell 130 is opposite to the polarity of the second magnet 142 adjacent to the isolation shell 130. That is, the first magnet 113 and the second magnet 142 arranged in the above manner attract each other, and the first magnet 113 and the second magnet 142 are separated by the isolation shell 130. After the drive assembly 111 is powered on, the control board controls the stator to generate a rotating magnetic field, the rotor 112 rotates under the action of the rotating magnetic field, and the rotor 112 drives the first magnet 113 to rotate. Since the first magnet 113 and the second magnet 142 attract each other, under the action of the magnetic force, the first magnet 113 drives the second magnet 142 to rotate. Since the second magnet 142 is fixedly connected to the hub 141, the second magnet 142 drives the hub 141 to rotate. In this way, under the condition that the drive assembly 111 and the impeller assembly 140 are not in contact, the drive assembly 111 can drive the impeller assembly 140 to rotate in the water inlet pipe 121 under the action of magnetic force.
The impeller assembly 140 also includes several blades provided on the hub 141. The hub 141 is vertically inserted into the water inlet pipe 121. The length of the hub 141 does not exceed the vertical length of the water inlet pipe 121. The shape of the blade is in the shape of a propeller, which can more effectively form a vortex when the hub 141 rotates, to suck water into the water inlet pipe 121.
The pump body 110 further includes a casing. The drive assembly 111 is arranged in the casing, and the isolation shell 130 is arranged at the opening of the casing. It can be understood that, after being installed in the above manner, the drive assembly 111, the casing and the isolation shell 130 are all part of the pump body 110. When using the water pump 100 to pump water, the pump body 110 is exposed outside the water, that is, the isolation shell 130 is also exposed outside the water. There is no need to pay special attention to exposing the isolation shell 130 to the outside of the water when the water pump 100 is used to pump water, which brings convenience for the user to use the water pump 100 and facilitates operation.
Further, as shown in FIG. 1 to FIG. 3, when there is one water outlet pipe 122 or a plurality of water outlet pipes 122, and the height of the water outlet 1221 of each water outlet pipe 122 is the same, the structure of the water outlet pipe 121 is shown in FIG. 3. The water inlet pipe 121 extends from the isolation shell 130. An end of the water inlet pipe 121 distant form the isolation shell 130 is provided with a water inlet, and the water outlet pipe 122 communicates with an end of the water inlet pipe 121 adjacent to the isolation shell 130. In an embodiment, the water inlet pipe 121 is provided with a water outlet joint 1212 adjacent to the isolation shell 130, and the water outlet pipe 122 is sleeved on the water outlet joint 1212, and the water outlet pipe 122 is communicated with the water inlet pipe 121. After the water comes out of the water inlet 1211 of the water inlet pipe 121 and enters the water inlet pipe 121, the water gradually flows to the connection position between the water inlet pipe 121 and the isolation shell 130, and then flows out of the water outlet pipe 122 from the water outlet joint 1212. The water outlet pipe 122 is sleeved on the water outlet joint 1212, that is, the water flowing out of the water outlet joint 1212 will enter the water outlet pipe 122 and then flow out from the water outlet pipe 122.
Further, the water outlet pipe 122 and the water inlet pipe 121 extend in the same direction, and an angle is formed between the water outlet 1221 of the water outlet pipe 122 and the water inlet pipe 121. When the pump body 110 is exposed outside the water and the pump head 120 is placed in the water, the water pump 100 can perform perturbation on the stagnant water by pumping and releasing the water, to make the stagnant water flow and form a circulation. The water inlet pipe 121 and the water outlet pipe 122 in the pump head 120 are in the same direction. That is, the water inlet pipe 121 is arranged vertically, and the water outlet pipe 122 is arranged vertically according to the water inlet pipe 121. Or the water outlet pipe 122 is inclined relative to the water inlet pipe 121. An angle is formed between the water outlet 1221 of the water outlet pipe 122 and the water inlet pipe 121, as shown in FIG. 1. The angle between the water outlet 1221 of the water outlet pipe 122 and the water inlet pipe 121 is different, the water outlet direction of the water outlet pipe 122 is different, the form for disturbing water is different, and the flow form of the water is different. Assuming that the water inlet 1211 of the water inlet pipe 121 is vertically downward, the angle between the water outlet 1221 of the water outlet pipe 122 and the water inlet pipe 121 is 90 degrees, and the water outlet 1221 is parallel to the bottom of the water source, that is, the water in the water outlet pipe 122 flows out in the horizontal direction, and the water flowing out of the water outlet pipe 122 disturbs the stagnant water in the horizontal direction.
The present disclosure further provides a cold water storage tank.
As shown in FIG. 4 to FIG. 6, FIG. 4 is an external schematic structural view of a cold water storage tank according to an embodiment of the present disclosure. FIG. 5 is an internal schematic structural view of the cold water storage tank according to an embodiment of the present disclosure. FIG. 6 is an internal schematic structural view of the cold water storage tank according to another embodiment of the present disclosure.
In some embodiments of the present disclosure, a cold water storage tank 200 includes a box body 210 and a water pump 100. The water inlet pipe 121 of the pump head 120 of the water pump 100 extends to a first position of the box body 210, the pump body of the water pump 100 is located at a second position of the box body 210, the first position is below the second position, and the first position is below a highest water level of the box body 210.
The highest water level is preset on the inner side wall of the box body 210, and the water in the box body 210 does not exceed the highest water level. It can be understood that the first position is the position below the liquid level when there is water in the box body 210, and the second position is the position above the liquid level when there is water in the box body 210. It can be understood that the pump body 110 is provided at the second position, when there is water in the box body 210, the pump body 110 cannot be touched by the water all the time. Since the drive assembly 111, the casing and the isolation shell 130 are all part of the pump body 110, the pump body 110 and the isolation shell 130 are also never contacted by water. The water inlet pipe 121 of the pump head 120 extends to the first position of the box body 210, that is, when there is water in the box body 210, the water inlet pipe 121 and the water inlet 1211 of the water inlet pipe 121 are always immersed in water. When the drive assembly 111 drives the impeller assembly 140 to rotate in the water inlet pipe 121, the water enters the water inlet pipe 121 through the water inlet 1211, and then flows out from the water outlet pipe 122, and the water flowing out from the water outlet pipe 122 flows into the box body again. Thus, the water in the water tank is disturbed, and the water in the water tank is in a flowing state.
It should be noted that the function of the cold water storage tank 200 is to realize cold storage, that is, to use the technology of freezing to store cold, the temperature of the water stored in the cold water storage tank 200 is controlled below 0 degrees Celsius, and the water in the cold water storage tank 200 is partially frozen, to realize the function of cold storage. For the cold water storage tank 200 to achieve cold storage, the water in the cold water storage tank 200 cannot be kept in a static state, that is, the water does not flow. If the water in the cold water storage tank 200 is in a static state, when the temperature is continuously lower than 0 degrees Celsius, the water in the cold water storage tank 200 will be completely frozen, and cold storage cannot be achieved. Therefore, it is necessary to keep the water in the cold water storage tank 200 in a flowing state.
As shown in FIG. 5, the thick black arrows in FIG. 5 indicate the flow of water into the pump head 120 during the pumping and draining of the water pump 100. The water pump 100 is applied to the cold water storage tank 200 to keep the water in the cold water storage tank 200 in a flowing state through the water pump 100. The pump body 110 of the water pump 100 is provided at the second position of the box body 210. The water inlet pipe 121 of the pump head 120 of the water pump 100 extends to the first position of the box body 210. The water outlet 1221 of the water outlet pipe 122 is also provided at the first position of the box body 210. When the drive assembly 111 in the pump body 110 works, the drive assembly 111 drives the impeller assembly 140 to rotate in the water inlet pipe 121. The turbine force generated by the impeller assembly 140 sucks the water in the casing 210 into the water inlet pipe 121. The centrifugal force generated by the impeller assembly 140 drives the water entering the water inlet pipe 121 into the water outlet pipe from the water inlet pipe 121, and then is discharged from the water outlet 1221 of the water outlet pipe 122. Since the water outlet 1221 of the water outlet pipe 122 is also provided at the first position of the box body 210, that is, the water outlet 1221 is immersed below the liquid level of the box body 210, the water in the water outlet pipe 122 is discharged from the water outlet 1221, and the water discharged from the water outlet 1221 disturbs the water in the box body 210. Therefore, the water in the box body 210 has a certain kinetic energy, the water in the box body 210 forms a circulation, and the water in the box body 210 is kept in a flowing state. In this way, all the water in the box body 210 is prevented from freezing, and the cold water storage tank 200 realizes cold storage. Due to the isolation effect of the isolation shell 130, the water entering the pump head 120 cannot enter the pump body 110 through the isolation shell 130, which plays a waterproof role. Thus, the drive assembly 111 and other components in the pump body 110 are prevented from being corroded by water, which is beneficial to prolong the service life of the water pump 100.
Further, a plurality of water outlet pipes 122 of the water pump 100 can be provided. As shown in FIG 7, when there are a plurality of water outlet pipes 122, all the water outlet pipes 122 are arranged at equal intervals along the circumferential direction of the water inlet pipes 121. It can be understood that when the water pump 100 is working, the water in the water inlet pipe 121 flows back into the box body 210 through the plurality of water inlet pipes 121 at different angles, to disturb the water in the box body 210. The case where all the water outlet pipes 122 are arranged at equal intervals along the circumferential direction of the water inlet pipe 121 can be in the way of picture A in FIG. 7, or in the way of picture B in FIG. 7, or in the way of picture C in FIG. 7. After the water in the water inlet pipe 121 re-flows into the box body 210 according to the way of picture A, the water in the box body 210 flows around the circumferential direction of the water inlet pipe 121 in a vortex shape. The water in the water inlet pipe 121 flows into the box body 210 radially again according to the way of picture B, and the water in the box body 210 flows around. After the water in the water inlet pipe 121 re-flows into the box body 210 according to the way of picture C, it can be the effect presented in the way of picture A, and it can also be the effect presented in the way of picture B. That is, when the top view of picture C is the same as that of picture A, the water in the box body 210 flows around the circumferential direction of the water inlet pipe 121 in a vortex shape. When the top view of picture C is the same as that of picture B, the water in the water inlet pipe 121 flows radially back into the box body 210 according to the way of picture B, and the water in the box body 210 flows around. Since there are multiple water outlet pipes and the water flowing out of all the water outlet pipes disturbs the water in the box body from different directions, the flow speed of the water is accelerated, to effectively prevent all the water in the box body from freezing.
Further, as shown in picture A of FIG. 7, in order to improve the flow speed of the water in the box body 210, each water outlet pipe 122 is provided along the tangential direction of the water inlet pipe 121, the height of the water outlet 1221 of each water outlet pipe 122 from the ground of the box body 210 is the same, and the water outlet 1221 of each water outlet pipe 122 has the same angle with the water inlet pipe 121. A plurality of water outlet pipes 122 are provided in the circumferential direction of the water inlet pipe 121 according to the way of picture A. Thus, the water in the box body 210 flows in a vortex shape around the circumferential direction of the water inlet pipe 121, to accelerate the flow speed of the water, and effectively prevent all the water in the box body from freezing.
Further, as shown in picture C of FIG. 7, each water outlet pipe 122 is provided in layers along the length direction of the water inlet pipe 121, the heights of the water outlet 1221 of each water outlet pipe 122 from the ground of the box body 210 are different, and the water outlet 1221 of each water outlet pipe 122 and the water inlet pipe 121 have the same angle. Each water outlet pipe 122 is set according to the way of picture C. The top view of the water outlet pipe 122 and the water inlet pipe 121 in picture C is the same as that in picture A. The water in the box body 210 also flows in a vortex shape around the circumferential direction of the water inlet pipe 121, to accelerate the flow speed of the water, and effectively prevent all the water in the box body from freezing.
Further, the cold water storage tank 200 further includes a tank cover 220. The pump body 110 of the water pump 100 is mounted on the tank cover 220, and the pump head 120 is located inside the tank cover 220 to extend toward the box body 210 to the first position. The box cover 220 is detachably connected to the box body 210, that is, the box cover 220 can be detached from the box body 210. In an embodiment, the whole of the pump body 110 is exposed outside the tank cover 220, the pump head 120 is inside the tank cover 220 and extends to the first position of the box body 210. That is, when there is water in the box body 210, the water inlet pipe 121 and the water outlet pipe 122 are always below the liquid level. In another embodiment, the upper half of the pump body 110 is exposed outside the tank cover 220, the lower half of the pump body 110 is exposed inside the tank cover 220, and the lower half of the pump body 110 is located at the second position of the box body 210, that is, above the first position of the box body 210. The pump head 120 is inside the tank cover 220 and extends to the first position of the box body 210, that is, when there is water in the box body 210, the water inlet pipe 121 and the water outlet pipe 122 are always below the liquid level. Regardless of the above installation methods, when the water pump 100 is working, the water entering the pump head 120 cannot enter the inside of the pump body 110 through the isolation shell 130, which plays a waterproof role.
The present disclosure further provides a water dispenser. The water dispenser includes a heat exchange system and a cold water storage tank 200. The heat exchange system includes an evaporator, and the evaporator is used to cool the water in the cold water storage tank 200. The cold water storage tank 200 is used for cooling the water pipe of drinking water, to realize the cooling of drinking water. The evaporator is provided in the box body 210 of the cold water storage tank 200. The evaporator is immersed in the box body 210 of the cold water storage tank 200, and the evaporator cools the water in the box body 210 by cooling. During the cooling period of the evaporator, the temperature of the outer surface of the evaporator immersed in water is below 0 degrees Celsius. Therefore, the temperature of the water in the box body 210 can be lowered, and the water in the box body 210 can cool the drinking water. During the cooling period of the evaporator, the water pump 100 works all the time, and the water pump 100 can keep the water in the box body 210 in a flowing state all the time, part of the water in the box body 210 freezes, that is, the outer surface of the evaporator immersed in the water freezes, preventing all freezing.
The water dispenser further includes a water supply system for supplying water to the cold water storage tank 200. The box body 210 is provide with a water level detector 230. The water level detector 230 is provided between the first position of the box body 210 and the second position of the box body 210. The water level detector 230 is configured to send a detected water level signal to the water supply system to trigger the water supply system to stop supplying water to the cold water storage tank 200. As shown in FIG. 6, the dotted line in FIG. 6 represents the liquid level of the water in the box body 210. The water level detector 230 is used to detect the water level signal in the box body 210, and the water level detector 230 may be a liquid level float switch, a liquid level sensor, or the like. The water level detector 230 is provided between the first position and the second position. That is, the water level detector 230 can be in contact with the liquid level, or can be above the liquid level and not in contact with water. During the operation of the water dispenser, the water level detector 230 detects the water level signal of the water in the box body 210 in real time, and feeds back the water level signal to the water supply system. When the water level signal is the water level height in the box body 210, the water supply system compares the pre-stored water level threshold with the water level height. If the water level height is greater than or equal to the water level threshold, and the liquid level in the box body 210 has reached the highest water level, the water supply system stops supplying water to the cold water storage tank, that is, water is no longer injected into the box body 210 of the cold water storage tank 200. When the water level signal is a switch signal and the liquid level in the box body 210 has reached the highest water level line, the water supply system stops supplying water to the cold water storage tank 200 and no longer injects water into the box body 210 of the cold water storage tank 200, to avoid that there is too much water in the box body 210 to overflow the box body 210, resulting in waste of water resources.

Claims

A water pump (100), comprising:
a pump body (110) comprising a drive assembly (111);

a pump head (120) comprising a water inlet pipe (121) and a water outlet pipe (122) communicating with the water inlet pipe (121);

an isolation shell (130) provided between the pump body (110) and the pump head (120); and

an impeller assembly (140) provided in the water inlet pipe (121), wherein the drive assembly (111) is magnetically connected to the impeller assembly (140) to drive the impeller assembly (140) to rotate in the water inlet pipe (121).
The water pump (100) of claim 1, wherein the isolation shell (130) is provided with a first end (131) and a second end (132), the first and second ends (131, 132) located at opposite sides of the isolation shell (130), wherein the drive assembly (111) comprises a rotor (112) and a first magnet (113), and wherein the impeller assembly (140) comprises a hub (141) and a second magnet (142), the rotor (112) rotatably connected to the first end (131), the hub (141) rotatably connected to the second end (132), and wherein the impeller assembly (140) is magnetically connected to the drive assembly (111) through the first magnet (113) and the second magnet (142).
The water pump (100) of claim 1 or 2, wherein the pump body (110) comprises a casing, wherein the drive assembly (111) is arranged in the casing, and wherein the isolation shell (130) is arranged at an opening of the casing.
The water pump (100) of any one of claims 1 to 3, wherein the water inlet pipe (121) extends from the isolation shell (130), wherein an end of the water inlet pipe (121) distant form the isolation shell (130) is provided with a water inlet (1211), and wherein the water outlet pipe (122) is in communication with an end of the water inlet pipe (121) adjacent to the isolation shell (130).
The water pump (100) of any one of claims 1 to 4, wherein the water outlet pipe (122) and the water inlet pipe (121) extend in a same direction, and wherein an angle is formed between a water outlet (1221) of the water outlet pipe (122) and the water inlet pipe (121).
A cold water storage tank (200), comprising:
a box body (210); and

a water pump (100) of any one of claims 1 to 5,

wherein the water inlet pipe (121) of the pump head (120) of the water pump (100) extends to a first position of the box body (210), wherein the pump body (110) of the water pump (100) is located at a second position of the box body (210), the first position being below the second position, and below a highest water level of the box body (210).
The cold water storage tank (200) of claim 6, further comprising:
a tank cover (220), wherein the pump body (110) of the water pump (100) is mounted on the tank cover (220), and wherein the pump head (120) is located inside the tank cover (220) to extend toward the tank body to the first position.
A water dispenser, comprising:
a heat exchange system;

a cold water storage tank (200) of any one of claims 6 to 7, wherein an evaporator in the heat exchange system is provided in the box body (210) of the cold water storage tank (200).
The water dispenser of claim 8, further comprising:
a water supply system for supplying water to the cold water storage tank (200);

wherein the box body (210) is provide with a water level detector (230), wherein the water level detector (230) is provided between the first position of the box body (210) and the second position of the box body (210), and wherein the water level detector (230) is configured to send a detected water level signal to the water supply system to trigger the water supply system to stop supplying water to the cold water storage tank (200).