TWI672091B - Heat dissipation device and cooling system - Google Patents

Abstract

A radiator includes a heat dissipation base, a cover, a piston mechanism and a rotation mechanism. The cooling base has a thermal contact surface. The cover is arranged on the heat dissipation base, so that the heat dissipation base and the cover jointly surround the liquid storage tank. The cover has a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet communicate with the liquid storage tank. The piston mechanism includes a cylinder body and a piston body. The cylinder body has an accommodating groove. The cylinder body is installed on the cover. The accommodating groove communicates with the liquid storage groove. The piston body is movably located in the accommodating groove. The rotating mechanism includes a rotating shaft and an impeller. The rotating shaft is rotatably located in the liquid storage tank and is pivotally connected to the piston body. The impeller is fixed to the rotating shaft and corresponds to the liquid inlet. Among them, when the liquid flows from the liquid inlet into the liquid storage tank, the inflowing liquid will push the impeller, and the piston body will be repeatedly moved relative to the cylinder through the rotating shaft.

Description

Radiator and cooling system

The invention relates to a radiator and a cooling system, in particular to a radiator and a cooling system with a piston mechanism.

The heat sink is closely related to the development of electronic devices. Since electronic components generate a large amount of thermal energy when the electronic device is in operation, if these thermal energy cannot be effectively eliminated and accumulated on the electronic components inside the electronic device, the electronic component may fail or crash due to the rising temperature. Therefore, manufacturers often reduce the temperature inside the electronic device through a liquid cooling system to maintain the normal operation of the electronic device.

However, at present, the liquid cooling systems designed by various manufacturers in the market are very similar in form, so the improvement of the heat dissipation efficiency of the liquid cooling system is difficult to improve due to the limitations of the liquid system itself. For example, the heat of electronic components is difficult to be quickly cooled. Liquid absorption, or the problem that the cooling liquid after heat absorption cannot be quickly discharged. In addition, the liquid cooling system currently produced by the manufacturer appears slightly monotonous in appearance.

The invention is to provide a radiator and a cooling system, so as to solve the problems that the heat dissipation efficiency of a liquid in a liquid cooling system in the prior art is difficult to improve and the appearance of the liquid cooling system is monotonous.

A heat sink disclosed in an embodiment of the present invention is suitable for thermal contact with a heat source. The radiator includes a heat dissipation base, a cover, a piston mechanism and a rotating mechanism. The cooling base has Thermal contact surface. The thermal contact surface is used for thermal contact of a heat source. The cover is arranged on the heat dissipation base, so that the heat dissipation base and the cover jointly surround the liquid storage tank. The cover has a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet communicate with the liquid storage tank. The piston mechanism includes a cylinder body and a piston body. The cylinder body has an accommodating groove. The cylinder body is installed on the cover. The accommodating groove communicates with the liquid storage groove. The piston body is movably located in the accommodating groove. The rotating mechanism includes a rotating shaft and an impeller. The rotating shaft is rotatably located in the liquid storage tank and is pivotally connected to the piston body. The impeller is fixed to the rotating shaft and corresponds to the liquid inlet. Among them, when the liquid flows from the liquid inlet into the liquid storage tank, the inflowing liquid will push the impeller, and the piston body will be repeatedly moved relative to the cylinder through the rotating shaft.

A cooling system disclosed in another embodiment of the present invention includes a water pump, a two-flow pipe, at least one water cooling row, and a radiator. The water pump has a water inlet and a water outlet. One end of the second-flow pipe is respectively connected to the water inlet and the water outlet of the water pump. At least one water-cooled row is disposed in one of the second-flow pipes. The radiator includes a heat dissipation base, a cover, at least a piston mechanism and a rotating mechanism. The cover is arranged on the heat dissipation base, so that a liquid storage tank is formed between the heat dissipation base and the cover. The cover has a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet communicate with the liquid storage tank, and the other ends of the two-flow tubes are connected respectively For liquid inlet and liquid outlet. At least one piston mechanism includes a cylinder body and a piston body. The cylinder body has an accommodating groove, the cylinder body is installed on the cover, and the accommodating groove communicates with the liquid storage groove. The piston body is movably located in the accommodating groove. The rotating mechanism includes a rotating shaft and an impeller. The rotating shaft is rotatably located in the liquid storage tank and is pivotally connected to the piston body. The impeller is fixed to the rotating shaft and corresponds to the liquid inlet. Wherein, when the water pump drives a liquid from the liquid inlet into the liquid storage tank, the inflowing liquid will push the impeller and cause the piston body to repeatedly move relative to the cylinder through the rotating shaft.

According to the radiator and cooling system disclosed in the above embodiment, when liquid flows from the liquid inlet into the liquid storage tank, the inflowing liquid will push the impeller and drive the piston through the rotating shaft. The body is repeatedly moved relative to the cylinder body, so that the liquid can absorb the heat emitted by the heat source and effectively discharge the heat-absorbing liquid through the rotating impeller and the reciprocating piston, so that the heat dissipation efficiency of the cooling system can be further improved.

The above description of the content of the present invention and the description of the following embodiments are used to demonstrate and explain the principle of the present invention, and provide further explanation of the scope of the patent application of the present invention.

10‧‧‧ cooling system

11‧‧‧ heat source

12‧‧‧ liquid

100‧‧‧Water pump

110‧‧‧Inlet

120‧‧‧ Outlet

200‧‧‧flow tube

300‧‧‧Water-cooled drain

400‧‧‧ Radiator

410‧‧‧cooling base

411‧‧‧ receiving tank

412‧‧‧Cooling Fin

4111‧‧‧accommodation space

4112‧‧‧fluid

4121‧‧‧ Fin Section

4122‧‧‧Bobe

4123‧‧‧ Thermal contact surface

420‧‧‧ Cover

421‧‧‧Liquid inlet

422‧‧‧Liquid outlet

430‧‧‧ divider

440‧‧‧Piston mechanism

441‧‧‧first piston mechanism

4411, 4421‧‧‧ cylinder

4412, 4422‧‧‧Piston bodies

4411a, 4421a‧‧‧ Receiving trough

442‧‧‧Second piston mechanism

450‧‧‧Rotating mechanism

451‧‧‧Rotating shaft

452‧‧‧ Impeller

453‧‧‧ connecting rod

460‧‧‧ liquid storage tank

461‧‧‧Subspace

P1, P2, P3, P4, P5, P6, C‧‧‧ central axis

N‧‧‧normal

θ 1, θ 2, θ 3, θ 4, θ 5, θ 6‧‧‧ acute angle

R1, R2, R3, R4‧‧‧ pivot axis

D1, D2‧‧‧ direction

FIG. 1 is a front view of a cooling system according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the heat sink of FIG. 1.

FIG. 3 is a top view of FIG. 2.

FIG. 4 is a front view of FIG. 2.

FIG. 5 is a schematic cross-sectional view of the second piston mechanism of FIG. 2 as the lowest point.

FIG. 6 is a schematic cross-sectional view of the second piston mechanism of FIG. 2 as the highest point.

See Figures 1 to 4. FIG. 1 is a front view of a cooling system according to a first embodiment of the present invention. FIG. 2 is a perspective view of the heat sink of FIG. 1. FIG. 3 is a top view of FIG. 2. FIG. 4 is a front view of FIG. 2.

The cooling system 10 of this embodiment includes a water pump 100, a second flow pipe 200, two water cooling plats 300, and a radiator 400.

The water pump 100 has a water inlet 110 and a water outlet 120. One end of the second-flow pipe 200 is respectively connected to the water inlet 110 and the water outlet 120 of the water pump 100, and the two water-cooling drains 300 are respectively disposed on the second-flow tube 200.

In this embodiment, the number of the water-cooled drains 300 is two, which is not intended to limit the present invention. In other embodiments, the number of water-cooled rows can be adjusted to one or more than two.

As shown in FIG. 2, the heat sink 400 is adapted to thermally contact a heat source 11. The heat sink 400 includes a heat dissipation base 410, a cover 420, a partition plate 430, a piston mechanism 440, and a rotation mechanism 450.

The heat dissipation base 410 includes a receiving groove body 411 and a heat dissipation fin 412. The accommodating tank body 411 has an accommodating space 4111 and three liquid flow ports 4112, and the accommodating space 4111 communicates with the three liquid flow ports 4112. The heat dissipation fin 412 includes a fin portion 4121 and a plate portion 4122 connected to each other. The plate portion 4122 closes the accommodation space 4111 so that the fin portion 4121 is located in the accommodation space 4111. The plate portion 4122 has a thermal contact surface 4123 on one side remote from the fin portion 4121. In this embodiment, the plate portion 4122 of the heat dissipation fin 412 is a copper plate and an aluminum block, and is used for thermal contact of the heat source 11.

In FIG. 2, the cover 420 is a cover that cannot be seen through, but is not limited thereto. In other embodiments, the plate body of the cover may be a see-through plate, and the material of the cover body may be an acrylic material. The cover is a cover body that can be seen through, which will be described in detail later.

The cover 420 is disposed in the accommodating groove 411 of the heat dissipation base 410 so that the accommodating groove 411 and the cover 420 surround a liquid storage tank 460 together. The cover 420 has a liquid inlet 421 and a liquid outlet 422. The partition plate 430 is located in the liquid storage tank 460 and divides the liquid storage tank 460 into two subspaces 461. The two subspaces 461 communicate with the liquid inlet 421 and the liquid outlet 422, respectively, and two of the liquid flow ports 4112 are located in one of the subspaces 461 and the other liquid flow port 4112. Located in the other subspace 461, the accommodating spaces 4111 of the accommodating tank 411 communicate with the two subspaces 461 through the three liquid flow ports 4112, respectively. The other ends of the second-flow tube 200 are connected to the liquid inlet 421 and the liquid outlet 422, respectively. The central axis P1 of the liquid inlet 421 and the central axis P2 of the liquid outlet 422 are at an acute angle θ1, θ2 with the normal line N of the thermal contact surface 4123, and the angles of the two acute angles θ1, θ2 are equal.

In this embodiment, the number of the liquid flow ports 4112 is three, and two of the three liquid flow ports 4112 are located in one subspace 461, and the other liquid flow port 4112 is located in the other subspace 461. The invention is limited. In other embodiments, the number of liquid flow ports in the second subspace can be adjusted according to the design of the manufacturer.

In addition, the acute angle θ 1 between the central axis P1 of the liquid inlet 421 and the normal line N of the thermal contact surface 4123 is equal to the acute angle θ 2 between the central axis P2 of the liquid outlet 422 and the normal line N of the thermal contact surface 4123. Angle, but not limited to this. In other embodiments, the acute angle between the central axis of the liquid inlet and the normal line of the thermal contact surface may be greater or smaller than the acute angle between the central axis of the liquid outlet and the normal line of the thermal contact surface.

The circulation of the cooling system 10 of this embodiment is to drive the liquid out of the water outlet 120 of the water pump 100 through the water pump 100, and send the liquid to the water-cooled drain 300 through the primary pipe 200 to cool the liquid, and then send it to the liquid inlet 421 of the cover 420. And in the direction D1, the liquid enters one of the subspaces 461. After the liquid enters one of the sub-spaces 461, it will flow through the two-liquid flow port 4112 and enter the accommodating space 4111 of the accommodating tank 411, so that the cooled liquid can absorb the heat energy absorbed by the heat dissipation fins 412 from the heat source 11. The liquid absorbs heat and then flows out through the liquid flow port 4112 communicating with the other subspace 461 and exits the cover 420 from the liquid outlet 422 to enter the other flow tube 200. At this time, the heat-absorbing liquid is transported via another flow tube 200 Arrive at another water-cooled row 300 to cool the heat-absorbing liquid, and then send the cooled liquid back to the water pump 100 to complete a cooling cycle.

Please refer to FIGS. 1 to 4 again, the piston mechanism 440 includes two first piston mechanisms 441 and two second piston mechanisms 442. The two first piston mechanisms 441 are aligned in line with the liquid inlet 421, and the two second piston mechanisms 442 are aligned in line with the liquid outlet 422, respectively. Each of the first piston mechanism 441 and each of the second piston mechanism 442 includes a cylinder body 4411, 4421, and a piston body 4412, 4422. The cylinder bodies 4411 and 4421 of this embodiment have a structure that cannot be seen through, and the cylinder bodies 4411 and 4421 of each of the first piston mechanism 441 and each of the second piston mechanism 442 have a receiving groove 4411a and 4421a. 4421 is installed on the cover 420, and the accommodating grooves 4411a and 4421a communicate with one of the subspaces 461 of the liquid storage tank 460. The central axis P3, P4, P5, P6 of each cylinder body 4411, 4421 and the normal line N of the thermal contact surface 4123 form an acute angle θ3, θ4, θ5, θ6. The piston bodies 4412 and 4422 are movably located in the receiving grooves 4411a and 4421a.

In this embodiment, the acute angles θ 3, θ 4, θ 5, and θ 6 between the central axes P3, P4, P5, and P6 of each cylinder block 4411, 4421 and the normal line N of the thermal contact surface 4123 are all Equal and equal to the angle between the acute angles θ 1 and θ 2 between the central axes P1 and P2 of the liquid inlet 421 and the liquid outlet 422 and the normal N of the thermal contact surface 4123.

The acute angle θ3, θ4, θ5, θ6 between the central axis P3, P4, P5, P6 of each cylinder block 4411, and the normal line N of the thermal contact surface 4123 is equal to the liquid inlet 421 and the liquid outlet 422 The acute angles θ 1 and θ 2 between the central axis P1, P2 and the normal N of the thermal contact surface 4123 are not limited thereto. In other embodiments, the acute angle between the central axis of each cylinder body and the normal line of the hot junction surface may be greater than or less than that in the liquid inlet, respectively. The acute angle between the axis of the mandrel and the normal of the thermal contact surface.

In addition, the central axis P3, P4, P5, P6 of the cylinder blocks 4411, 4421 and the normal N between the thermal contact surface 4123, the acute angle θ3, θ4, θ5, θ6 are set, that is, the V-shaped engine as common The arrangement of the cylinder body is not limited to this. In other embodiments, the central axis of the cylinder block may be parallel to the normal line of the thermal contact surface, that is, the arrangement form of the cylinder block in a common inline engine. Alternatively, the central axis of the cylinder block may be perpendicular to the normal line of the thermal contact surface, that is, a horizontally arranged form of the cylinder block in a horizontal engine as is generally common.

In the cooling system 10 of this embodiment, since the piston mechanism 440 is provided, the cooling system 10 can be matched with the sound of the engine, so that the operation of the cooling system 10 is like the engine, and the sound effect of the cooling system 10 can be increased.

The rotating mechanism 450 includes a rotating shaft 451, an impeller 452, and four connecting rods 453. The rotating shaft 451 in this embodiment is, for example, but not limited to, a cam shaft commonly used in engines. The rotating shaft 451 is rotatably located in the liquid storage tank 460 and is pivotally connected to each of the piston bodies 4412 and 4422. The impeller 452 is fixed to the rotation shaft 451 and corresponds to the liquid inlet 421. The opposite ends of each link 453 are pivotally connected to the rotation shaft 451 and the piston body 4412, 4422, respectively, and the pivot axis R1, R2, R3, R4 and the rotation shaft 451 are pivotally connected to each link 453 and the rotation shaft 451 The center axis C is not coaxial.

Please refer to FIG. 2, FIG. 5 and FIG. 6 together. FIG. 5 is a schematic cross-sectional view of the second piston mechanism of FIG. 2 as the lowest point. FIG. 6 is a schematic cross-sectional view of the second piston mechanism of FIG. 2 as the highest point.

When the liquid 12 flows into the liquid storage tank 460 from the liquid inlet 421, the inflowing liquid 12 will push the impeller 452 and drive the piston body 4412, 4422 phase through the rotating shaft 451. The cylinders 4411 and 4421 are repeatedly moved. As shown in FIG. 5 and FIG. 6, one of the second piston mechanisms 442 in this embodiment is used to describe in detail. In the aforementioned cooling cycle, when the liquid 12 enters one of the subspaces 461 from the liquid inlet 421, the liquid 12 will push the impeller 452 to rotate in the direction D2, so that the impeller 452 drives the rotation shaft 451 to move together. Because the pivot axis R2 pivoted by the connecting rod 453 and the rotating shaft 451 is not coaxial with the central axis C of the rotating shaft 451, when the rotating shaft 451 rotates, the pivot of the connecting rod 453 to the rotating shaft 451 will follow As the rotating shaft 451 rotates, the distance between the pivot joint and the thermal contact surface 4123 increases and decreases. That is, the connecting rod 453 will reciprocate up and down relative to the thermal contact surface 4123 due to the rotation of the rotation shaft 451, so that the piston body 4422 pivotally connected to the other end of the connecting rod 453 reciprocates with respect to the cylinder body 4421 as shown in Figs. 5 and 6 The piston body 4422 is shown in a state close to or away from the cylinder body 4421.

In the cooling system 10 of this embodiment, through the rotation of the impeller 452 and the reciprocating arrangement of the multiple piston bodies 4412 and 4422 driven by the impeller 452, the liquid 12 in the liquid storage tank 460 can be caused to flow, so that the liquid 12 is uniform. Absorbs the heat of the heat dissipation fins 4121, thereby achieving a better cooling effect.

For example, when the electronic device is operating at full load and a plurality of piston bodies 4412, 4422 are reciprocating, the detected maximum temperature of the CPU of the electronic device is 82 degrees Celsius. Conversely, when the electronic device is operating at full load, if the plurality of piston bodies 4412, 4422 are stopped to reciprocate, the maximum temperature of the detected CPU of the electronic device is 90 degrees Celsius. It can be seen that the rotating impeller 452 and the plurality of piston bodies 4412 and 4422 that reciprocate can effectively help to dissipate heat.

In addition, the impeller 452 is driven to rotate by the cold liquid 12 flowing from the liquid inlet 421, which helps to fill the cold liquid 12 into the second liquid flow port 4112, so that the cold liquid 12 can be quickly moved. Quickly enter the accommodating space 4111 to absorb the heat of the heat dissipation fins 4121, so as to improve the efficiency of heat dissipation. In addition, the rotating impeller 452 drives a plurality of piston bodies 4412, 4422 to be set to reciprocate, which can help the heat-absorbing liquid 12 quickly exit the subspace 461, so that the cooling efficiency of the cooling system 10 can be further improved.

In addition, the flow rate of the liquid 12 flowing through the liquid inlet 421 can be judged by the speed at which the piston body 4412, 4422 repeatedly moves, and whether the operation of the cooling system 10 is normal.

In this embodiment, the cover 420 equipped with the piston mechanism 440 is provided with a heat dissipation base 410, and is not intended to limit the present invention. In other embodiments, the cover equipped with the piston mechanism can be separated from the heat dissipation base, and becomes a housing with the piston mechanism, and the housing with the piston mechanism and the heat dissipation base are connected through the water outlet pipe and the water inlet pipe respectively, and The water pump and water-cooled drain form a water-cooled circuit. In this way, the housing with the piston structure can be not limited by the space, but the housing with the piston mechanism can be disposed in an excess space of the electronic device, and the number of pistons can be increased.

In this embodiment, the cover 420 and each of the cylinders 4411 and 4421 are non-perspective structures, but not limited thereto. In other embodiments, the cover body and the cylinder body can be changed to a see-through structure. In this way, the user can observe from the appearance of the cooling system whether the amount of liquid in the liquid storage tank is sufficient and determine whether the rotation of the impeller is normal, so that the user can judge the operation of the cooling system from the appearance of the cooling system. situation. In addition, the see-through cylinder body can help users directly observe the reciprocating movement of the piston inside the cylinder body, so as to know the operation of the cooling system.

In addition, the liquid inside the cooling system can be a liquid that can change color when heated The body, that is, the liquid has different colors at different temperatures, and with a cover that can see through, can judge the temperature of the liquid located in the liquid storage tank and the accommodating space. In addition, through the transparent cover, the liquid color at different temperatures can be exposed to the outside, which can beautify the appearance of the cooling system.

According to the motherboard assembly disclosed in the above embodiment, the rotating impeller and the reciprocating arrangement of the multiple piston bodies driven by the impeller can make the liquid in the liquid storage tank flow, so that the liquid can evenly absorb the heat of the radiating fins. To achieve better cooling effect.

In addition, because the liquid flows from the liquid inlet into the liquid storage tank, the impeller is pushed, and multiple piston bodies are reciprocated relative to the cylinder, so that the cooling system fills the cold liquid into the accommodation space to absorb heat, and the speed at which the heat-absorbing liquid is discharged. accelerate. In this way, the cooling system's efficiency in heat dissipation can be further improved.

In addition, in some embodiments, because the cover and the cylinder in the cooling system have a see-through structure, the user can determine whether the internal operation of the cooling system is normal.

In addition, the see-through cover and cylinder are matched with liquids that can change color with temperature changes, so that the cooling system is different from the previous design in appearance and has better visual effects. In addition, the cooling system of the above embodiment is not only beautified in appearance, because the cooling system has a piston structure arrangement, it can be matched with the sound of the engine, so that the cooling system has more acousto-optic effects.

Although the present invention is disclosed in the foregoing preferred embodiments as above, it is not intended to limit the present invention. Any person skilled in similar arts can make some changes and retouch without departing from the spirit and scope of the present invention. The scope of patent protection of an invention shall be determined by the scope of patent application attached to this specification.

Claims (10)

A radiator suitable for thermally contacting a heat source and connected to a water pump. The radiator includes: a heat dissipation base having a thermal contact surface for thermal contact with the heat source; and a cover provided on the heat source. A heat dissipation base, so that the heat dissipation base and the cover jointly surround a liquid storage tank, the cover has a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet communicate with the liquid storage tank; at least a piston mechanism, Containing a cylinder body and a piston body, the cylinder body has an accommodation groove, the cylinder body is installed on the cover, and the accommodation groove communicates with the liquid storage tank, and the piston body is movably located in the accommodation groove And a rotating mechanism comprising a rotating shaft and an impeller, the rotating shaft is rotatably located in the liquid storage tank and is pivotally connected to the piston body, the impeller is fixed to the rotating shaft and corresponds to the liquid inlet; When the water pump drives a liquid from the liquid inlet into the liquid storage tank, the inflowing liquid will push the impeller and drive the piston body to repeatedly move with respect to the cylinder through the rotating shaft. The radiator according to item 1 of the scope of patent application, wherein the rotating mechanism further includes at least one connecting rod, and opposite ends of the at least one connecting rod are respectively pivotally connected to the rotating shaft and the piston body, and the at least one The pivot axis pivoted by the rod and the rotation shaft is not coaxial with the central axis of the rotation shaft. The radiator according to item 1 of the scope of patent application, wherein the central axis of the cylinder is parallel to the normal line of the thermal contact surface. The radiator according to item 1 of the scope of patent application, wherein the central axis of the cylinder is perpendicular to the normal line of the thermal contact surface. The radiator according to item 1 of the scope of patent application, wherein the central axis of the cylinder body and the normal line of the thermal contact surface are at an acute angle. The radiator according to item 5 of the scope of patent application, wherein the central axis of the liquid inlet and the central axis of the liquid outlet are at an acute angle with the normal of the thermal contact surface, and the at least one piston mechanism includes a plurality of first A piston mechanism and a plurality of second piston mechanisms, the first piston mechanisms and the liquid inlet are aligned along a line, and the second piston mechanisms and the liquid outlet are aligned along a line. The heat sink according to item 1 of the patent application scope, wherein the cover is at least partially a see-through plate. The heat sink according to item 1 of the scope of the patent application, wherein the heat dissipation base comprises a receiving groove and a heat dissipation fin, and the heat dissipation fin is disposed in the receiving groove. The radiator as described in item 8 of the scope of patent application, further comprising a partition plate, which is located in the liquid storage tank and divides the liquid storage tank into two subspaces, which are respectively connected to the liquid inlet and the liquid inlet. A liquid outlet, the accommodating tank body has an accommodating space and a plurality of liquid flow openings, the radiating fin includes a fin part and a plate part connected, and the plate part closes the accommodating space so that the fin part It is located in the accommodating space, and the accommodating space communicates with the two subspaces through the liquid flow ports. A cooling system includes: a water pump having a water inlet and a water outlet; a two-flow pipe, one end of which is respectively connected to the water inlet and the water outlet of the water pump; and at least one water-cooled drain disposed on the second flow pipe One; and a radiator, comprising: a heat sink base; a cover disposed on the heat sink base so that a liquid storage tank is formed between the heat sink base and the cover, the cover having a liquid inlet and a liquid An outlet, the liquid inlet and the liquid outlet communicate with the liquid storage tank, and the other end of the second flow tube is connected to the liquid inlet and the liquid outlet, respectively; at least a piston mechanism including a cylinder body and a piston body, the cylinder body It has an accommodating groove, the cylinder is installed on the cover, and the accommodating groove communicates with the liquid storage tank, the piston body is movably located in the accommodating groove, and a rotating mechanism includes a rotating shaft and a An impeller, the rotating shaft is rotatably located in the liquid storage tank and is pivotally connected to the piston body, the impeller is fixed to the rotating shaft and corresponds to the liquid inlet; wherein, when the water pump drives a liquid to flow from the liquid inlet The When the tank, the inflow of the liquid pushes the impeller, and the drive shaft through the rotation of the piston relative to the cylinder body is moved repeatedly.