TWI660475B - Water cooling device capable of switching pump circuit - Google Patents

Abstract

The present invention is a water-cooling device with switchable pump circuit. It sends water-cooled liquid through a first pump or a second pump, and moves a nuclear valve to the first position or the second position. The water-cooled liquid can enter the nuclear valve from different directions and then flow out from the output hole. The nuclear-driven valve does not need to consume electricity, and can also achieve the anti-reverse effect. Then, the water-cooled liquid will flow into the hot water absorption head to cool a load. Then it is collected and flowed into the heat-dissipating water-cooled drain to dissipate heat, and then sent to the water tank for cyclic operation to achieve the effect of bidirectionally switching the pump circuit, and the water-cooling system can be continuously operated without stopping.

Description

Water cooling device capable of switching pump circuit

The present invention relates to a heat-dissipating device, and more particularly to a water-cooling device capable of switching pump circuits for continuous operation.

In general, most industrial computers, server computers, and high-heat-dissipating components run for 24 hours. The computer's server generates high heat during operation. Although a cooling fan is installed in the computer, the heat source of the computer equipment is constantly generated and installed. The cooling fan has a poor air convection effect, which makes the cooling effect limited. Therefore, in order to effectively reduce the temperature, some manufacturers have developed a water-cooling device, which is installed on the heating element of electronic equipment and can use water-cooling liquid to circulate continuously. Enter and exit to adjust the working temperature of the computer server.

However, the conventional water cooling device is lacking. As the conventional water cooling device uses a solenoid valve to avoid the backflow of the water-cooled liquid, the solenoid valve is prone to failure if it is wet for a long time, which interrupts the water cooling system and affects the operation of the computer. The interruption of the work is based on the observation that the inventor of the present case, after observing the above-mentioned shortcomings, believes that the conventional water cooling device still needs to be further improved, and the invention has emerged.

The main purpose of the present invention is to provide a water-cooling device capable of switching the pump circuit. The anti-reverse device does not require the consumption of electricity and can also achieve the anti-reverse effect. The pump circuit can be switched without stopping for 24 hours. Maintain cooling performance 24 hours a day.

In order to achieve the above object, the water-cooling device of the switchable pump circuit provided by the present invention comprises: a water tank provided with a water-cooled liquid; a first pump whose water inlet is connected to the water outlet of the water tank A second pump whose water inlet is connected to the water outlet of the water tank; a control unit which is electrically connected to the first pump and the second pump, respectively; a nuclear valve which has a body The system is provided with a cavity, the cavity system comprises a first shaft hole, a second shaft hole and an output hole which communicate with each other, the first shaft hole is connected to the first pump, and the second The shaft hole is connected to the second pump, and the chamber is provided with a check valve. The check valve is movable in the chamber, and defines a first position and a second position. In the first position, the first shaft hole is in communication with the output hole, and the second shaft hole is not in communication with the first shaft hole and the output hole, respectively. When the check valve is in the second position, the second The shaft hole is in communication with the output hole, and the first shaft hole is not connected with the second shaft hole and the output hole, respectively. Connected; a hot water absorption cold head, which is connected to the output hole of the nuclear valve; a radiator water cooling row, the first end of which is connected to the water cooling head, and the second end of which is connected to the water tank; a first circuit, when the When the non-return valve is in the first position, the water tank, the first pump, the first shaft hole of the nuclear valve, the output hole of the nuclear valve, the hot water absorption head and the heat-dissipating water cooling system are in communication; The second circuit, when the check valve is in the second position, the water tank, the second pump, the second shaft hole of the nuclear valve, the output hole of the nuclear valve, the hot water absorption head and the heat dissipation Water-cooled drains are connected.

The water-cooling device of the switchable pump circuit provided by the present invention is to send the water-cooling liquid out by the first pump or the second pump, and move the check valve to the first position or the second Position so that the water-cooled liquid can enter the chamber from the first shaft hole or the second shaft hole and then flow out from the output hole. The nuclear valve does not need to consume power and can also achieve the anti-reverse effect. The water-cooled liquid will flow into the hot-water absorption cold head to cool a load, and then the heated water-cooled liquid will be collected and flowed into the heat-dissipating water-cooling row to dissipate heat, and then sent to the water tank for circulating operation, to achieve the effect of bidirectional switching of the pump circuit. And make the water cooling system run continuously without interrupting the cooling effect.

Please refer to FIG. 1, which is a system configuration diagram of the present invention, which discloses a water-cooling device 200 with a switchable pump circuit, and includes:

A water tank 210 is provided with a water cooling liquid.

A first pump 220 has a water inlet 225 connected to the water inlet 215 of the water tank 210.

A second pump 230 has a water inlet 235 connected to the water inlet 215 of the water tank 210.

A control unit 240 is electrically connected to the first pump 220 and the second pump 230, respectively.

A nuclear valve 100, please refer to FIG. 2, FIG. 3 and FIG. 4. It is provided with a body 10, which is provided with a chamber 11, and the chamber 11 includes a communicating first section. A shaft hole 12, a second shaft hole 13, and an output hole 14, the first shaft hole 12 and the second shaft hole 13 are respectively disposed on two opposite sides of the body 10, and the first shaft hole 12 and The central shaft of the second shaft hole 13 is located on the same axis 101. The openings of the first shaft hole 12, the second shaft hole 13, and the output hole 14 are respectively provided with internal threads 121, 131, and 141. The first shaft hole 12 and the second shaft hole 13 are respectively provided with a positioning plug head 20, and each positioning plug head 20 has a first end 201 and a second end 202, and the first end 201 and the A perforation 21 is penetrated between the second ends 202, and a stopper 22 is provided on the outer peripheral wall of each positioning plug 20 at the first end 201, and the outer diameter of the stoppers 22 is larger than the first The inner diameters of the shaft hole 12 and the second shaft hole 13 enable the stoppers 22 to stop the first shaft hole 12 and the second shaft hole 13 respectively, and each positioning plug 20 is located on the outer peripheral wall In this A groove 23 is provided on the side of the stopper 22, and a sealing ring 24 is provided on each of the grooves 23. An outer peripheral wall of each positioning plug 20 is provided on the side of each of the grooves 23. Threads 231, so that the positioning plugs 20 can be screwed into the internal threads 121, 131 of the first shaft hole 12 and the second shaft hole 13, respectively, and the perforations 21 are provided with a stop at the first end 201 Stop sections 211, the inner diameter of the stop sections 211 are larger than the inner diameter of the perforations 21, and the perforations 21 are provided with a stop section 212 beside the stop section 211, and the stop sections 212 The inner diameter is smaller than the inner diameter of the perforations 21. The perforations 21 are provided with a positioning section 213 at the second end 202. The positioning section 213 of each positioning plug 20 is set at intervals. The inner diameter of 213 is larger than the inner diameter of the perforations 21, and an enlarged diameter section 214 is further provided between the positioning sections 213 and the perforations 21, and the inner diameter of the enlarged diameter section 214 is toward the second end 202. The direction gradually increases. In addition, the chamber 11 is provided with a check valve 30, and the check valve 30 is provided between the perforations 21, and the check valve 30 has a The moving member 31 has two first ends 311 and two second openings 312 corresponding to the first shaft hole 12 and the second shaft hole 13 at both ends of the nuclear moving member 31. The nuclear moving member 31 is connected to the first The opening 311 and the second opening 312 are each provided with a damping member 313. In this embodiment, the damping member 313 is an end surface of both ends of the check valve 30. The size of the damping member 313 can reduce the first opening. The inner diameter of 311 and the second opening 312 are increased to increase the damping value. The nuclear member 31 is provided with a ring groove 32 on the outer peripheral wall at the middle position, and the ring groove 32 is provided with a positioning ring 33. The nuclear member 31 is provided with a baffle 34 perpendicular to the axis direction. The baffle 34 is formed with a first blocking surface 341 and a second blocking surface corresponding to the first shaft hole 12 and the second shaft hole 13 respectively. 342, the first blocking surface 341 and the second blocking surface 342 are respectively recessed with a conical groove 343, and the check valve 30 is provided between the first opening 311 and the first blocking surface 341 and the first blocking surface 341. The opening 311 communicates with one first channel 35 and three first perforations 36, the first channel 35 communicates with the output hole 14, and the check valve 30 is connected with the Between the two openings 312 and the second blocking surface 342, there is a second channel 37 and three second perforations 38 communicating with the second opening 312. The second channel 37 communicates with the output hole 14, wherein the stop The reverse valve 30 is movable in the chamber 11 and defines a first position and a second position. When the check valve 30 is in the first position, the positioning ring 33 is positioned in the second shaft hole 13. In the positioning section 213, the baffle 34 closes the second passage 37, and the first shaft hole 12, the first passage 35, and the output hole 14 communicate with each other. When the check valve 30 is in the second position, The positioning ring 33 is positioned at the positioning section 213 of the first shaft hole 12, the baffle 34 closes the first channel 35, and the second shaft hole 13, the second channel 37 and the output hole 14 communicate with each other. Moreover, the positioning plug heads 20 are respectively provided with a rotary joint 40. The rotary joint 40 has a first end 41 and a second end 42. The first end 41 and the second end 42 are threaded therethrough. A through hole 43 is provided. The first ends 41 of the rotary joints 40 form a screw head 411 radially outward, and the screw heads 411 protrude from the stator. The perforation 21 of the plug 20 and the screw heads 411 are respectively provided with a first connection pipe 310 and a second connection pipe 320. The other end of the first connection pipe 310 is connected to the first pump 220. The other end of the second connecting pipe 320 is connected to the second pump 230, the through hole 43 is provided with an internal thread 431 at the first end 41, and the rotary joints 40 are further provided with a stop ring 44. The stop rings 44 are respectively accommodated in the stop sections 211. The stop rings 44 are sandwiched between the screw head 411 and the stopper 22. The second ends 42 of the rotary joints 40 are It is placed in the limit section 212, and a plurality of protrusions 421 are convexly arranged on the outer peripheral wall of the second ends 42. The protrusion 421 of the rotary joint 40 penetrates the limit section 212 and is locked in the limit section 212. The perforation 21 allows the rotary joint 40 to rotate in the limiting section 212.

A hot water absorption cold head 250 is connected to the output hole 14 of the nuclear valve 100 by a third connecting pipe 330.

A heat-dissipating water-cooling row 260 has a first end 261 connected to the water cooling head 250 and a second end 262 connected to the water tank 210.

A first circuit, when the check valve 30 is in the first position, the water tank 210, the first pump 220, the first shaft hole 12 of the nuclear valve 100, and the output hole 14 of the nuclear valve 100 The hot-water-absorbing cold head 250 and the heat-dissipating water-cooling row 260 are in communication with each other.

A second circuit, when the check valve 30 is in the second position, the water tank 210, the second pump 230, the second shaft hole 13 of the nuclear valve 100, and the output hole 14 of the nuclear valve 100 The hot-water-absorbing cold head 250 and the heat-dissipating water-cooling row 260 are in communication with each other.

In order to further understand the structural features of the present invention, the use of technical means, and the expected effects, the manner of use of the present invention is described. It is believed that the deeper and specific understanding of the present invention can be obtained as follows:

First, the control unit 240 is used to turn on the first pump 220. Please refer to FIG. 5, FIG. 6, and FIG. 7. When the first pump 220 is operated, the water-cooled liquid is supplied by the first pump. The pump 220 flows out and flows to the nuclear valve 100 through the first connecting pipe 310. The water-cooled liquid pushes the baffle 34 of the check valve 30 with water pressure, so that the check valve 20 is directed toward the second shaft hole 13 Move in the direction, and position the positioning ring 33 on the positioning section 213 of the second shaft hole 13, so that the check valve 30 is located in the first position, and because the inner diameter of the enlarged diameter section 214 is smaller than the positioning ring 33 The outer diameter of the non-return valve 30 cannot continue to move in the direction of the second shaft hole 13. At this time, the baffle 34 closes the second channel 37, and the water-cooled liquid flows from the first shaft hole 12. It enters and flows to the first blocking surface 341 and then flows out from the first perforations 36, and flows from the first perforations 36 to the output holes 14. Then, the water-cooled liquid flows through the third connection pipe 330 to the hot water absorption head 250 to reduce the temperature of a load 400, and then flow from the hot-water absorption cold head 250 to the heat-dissipating water-cooling row 260 for heat dissipation Back to the tank 210, and then finally flows into the first pump 220 from the tank 210 to the first circulation loop.

Please refer to FIG. 8 and FIG. 9 again. When the control unit 240 turns off the first pump 220 and starts the second pump 230 to operate, the water cooling liquid flows out from the second pump 230 and passes through the The second connecting pipe 320 flows to the nuclear valve 100, and the water-cooled liquid is used to push the baffle 34 of the check valve 30 using water pressure to move the check valve 30 toward the first shaft hole 12 and make the The positioning ring 33 is positioned at the positioning section 213 of the first shaft hole 12, so that the check valve 30 is located at the second position, and because the inner diameter of the enlarged diameter section 214 is smaller than the outer diameter of the positioning ring 33, so that The check valve 30 cannot continue to move in the direction of the first shaft hole 12, wherein the baffle 34 closes the first passage 35, and the water-cooled liquid enters from the second shaft hole 13 and flows to the second stop. The surface 342 flows out from the second perforations 38 and flows from the second perforations 38 to the output holes 14. Then, the water cooling liquid flows through the third connecting pipe 330 to the hot water absorption cold head 250 to reduce the load 400. Temperature, flows from the hot-water absorption cold head 250 to the heat-dissipating water-cooling row 260 for heat dissipation, and then flows back to the water tank 210, Finally, it flows from the water tank 210 into the second pump 230 to circulate the second circuit. Thus, the nuclear valve 100 does not need to use the power consumption, and can also achieve the anti-reverse effect. When the first pump 220 Or when the second pump 230 fails abnormally, the other pump can continue to run to achieve the effect of bidirectional switching circuit, so that the water cooling system does not need to stop and can operate without interruption to achieve the best heat dissipation effect.

It is worth mentioning that when the water cooling system is switching the first circuit or the second circuit, for example, when the first circuit is switched to the second circuit, the first pump 220 is shut down due to failure, and the second The pump 230 is turned on, so that the second blocking surface 342 and the damping member 313 receive the water-cooled liquid pushed by the second pump 230, and the check valve 30 is moved from the first position to the second position. During the movement, both the second blocking surface 342 and the damping member 313 will receive the water-cooled liquid, so that the check valve 30 can be surely moved and positioned to the positioning section 213 of the first shaft hole 12 to make the water-cooled The system can continue to run without stopping, so it can operate uninterruptedly to achieve the best heat dissipation effect, thereby receiving the water-cooled liquid of the first pump 220 and the second pump 230 through the check valve 30, Then, the pressure on the first blocking surface 341 or the second blocking surface 342 is used as a nuclear driving mechanism to achieve the effect of bidirectional switching.

The first blocking surface 341 and the second blocking surface 342 are provided with the conical groove 343, so that the water cooling liquid can pass along the slope of the conical groove 343 toward the first perforations 36 or the second The flow in the direction of the perforation 38 reduces the phenomenon of turbulence and increases the flow rate and flow rate of the water-cooled liquid.

It is worth mentioning again that, since the projections 421 of the rotary joints 40 penetrate the limiting section 212 and are locked in the perforations 21, the rotary joints 40 can rotate at the limiting section 212. The rotation joint 40 can be adjusted to the angle of the first connection pipe 310 and the second connection pipe 320, and the position of the rotation joint 40 can be adjusted to facilitate the installation of the nuclear valve 100.

It is worth mentioning that since the first shaft hole 12 and the second shaft hole 13 are respectively provided with the positioning rings 33 between the positioning plug heads 20 and the positioning plug heads 20, the positioning plug heads 20 and the rotary screws These stop rings 44 are respectively clamped between the heads 40 to prevent the water-cooling liquid from overflowing during the circulation process, so as to achieve a better leak-proof design.

Hereby, the features of the present invention and the expected effects that can be achieved are stated as follows:

The water-cooling device of the switchable pump circuit of the present invention operates by sending the water-cooled liquid with the first pump 220 or the second pump 230 and moving the check valve 30 to the first position or the In the second position, the water-cooled liquid can enter the chamber 11 from the first shaft hole 12 or the second shaft hole 13 and then flow out from the output hole 14. In the first position, the first shaft hole 12 and the The output hole 14 is conducting, and the second channel 37 is not conducting. In the second position, the second shaft hole 13 is conducting with the output hole 14 and the first channel 35 is not conducting. Then, the water-cooled liquid will flow into the The hot water absorption cold head 250 cools the load 400, and the heated water-cooled liquid is collected and flowed into the heat-dissipating water-cooling row 260 for heat dissipation, and then sent to the water tank 210 for circulating operation, thus achieving the effect of continuous operation without interrupting cooling Therefore, by moving the check mechanism of the check valve 30, the pump circuit can be switched, and the water cooling system can continue to run without interrupting cooling.

In summary, the present invention has excellent progress and practicality among similar products. At the same time, it has traversed domestic and foreign technical data on such structures. It has not been found in the literature that the same structure exists first. Therefore, The present invention already has the elements of an invention patent, and the application is filed according to law.

However, the above is only one of the preferred feasible embodiments of the present invention. Therefore, any equivalent structural changes made by applying the description of the present invention and the scope of patent application should be included in the patent scope of the present invention.

200‧‧‧Water cooling device with switchable pump circuit

210‧‧‧Water tank

215‧‧‧Water inlet

220‧‧‧The first pump

225‧‧‧Inlet

230‧‧‧Second Pump

235‧‧‧Inlet

240‧‧‧control unit

250‧‧‧ Heat-absorbing cold head

260‧‧‧Heat Radiator

261‧‧‧ the first end

262‧‧‧second end

100‧‧‧ Nuclear Power Valve

10‧‧‧ Ontology

101‧‧‧ axis

11‧‧‧ chamber

12‧‧‧First shaft hole

121‧‧‧ Internal thread

13‧‧‧Second shaft hole

131‧‧‧ Internal thread

14‧‧‧output hole

141‧‧‧internal thread

20‧‧‧ positioning plug

201‧‧‧ the first end

202‧‧‧ the second end

21‧‧‧perforation

211‧‧‧stop

212‧‧‧Limited section

213‧‧‧ positioning section

214‧‧‧Expansion section

22‧‧‧stop

23‧‧‧Groove

231‧‧‧external thread

24‧‧‧Sealing ring

30‧‧‧ check valve

31‧‧‧ nuclear

311‧‧‧first opening

312‧‧‧Second Opening

313‧‧‧Damper

32‧‧‧ ring groove

33‧‧‧ positioning ring

34‧‧‧ bezel

341‧‧‧First stop

342‧‧‧Second Block

343‧‧‧conical groove

35‧‧‧first channel

36‧‧‧ first perforation

37‧‧‧Second Channel

38‧‧‧ second perforation

40‧‧‧Rotary joint

41‧‧‧ the first end

411‧‧‧Screw head

42‧‧‧ the second end

421‧‧‧ bump

43‧‧‧through hole

431‧‧‧internal thread

44‧‧‧ Stop ring

310‧‧‧First connecting pipe

320‧‧‧Second connection pipe

330‧‧‧Third connection pipe

400‧‧‧ load

FIG. 1 is a system configuration diagram of the present invention. Figure 2 is a combined perspective view of the nuclear valve of the present invention. FIG. 3 is an exploded perspective view of the nuclear valve of the present invention. Fig. 4 is a sectional view of the nuclear valve of the present invention. Fig. 5 is a block diagram of the system of the present invention to show the connection state of the first circuit. Fig. 6 is a schematic diagram of the use of the present invention to show the initial state of the water-cooled liquid flowing into the chamber. FIG. 7 is a schematic diagram of the use of the present invention to show the state where the water-cooled liquid flows in through the first shaft hole. Fig. 8 is a block diagram of the system of the present invention to show the connection state of the second circuit. FIG. 9 is a schematic diagram of the use of the present invention to show the state where the water-cooled liquid flows in through the second shaft hole.

Claims (7)

A water cooling device with switchable pump circuit includes: a water tank provided with a water cooling liquid; a first pump whose water inlet is connected to a water outlet of the water tank; a second pump whose inlet The water outlet is connected to the water inlet of the water tank; a control unit is electrically connected to the first pump and the second pump, respectively; a nuclear valve is provided with a body, and the system is provided with a chamber The chamber system includes a first shaft hole, a second shaft hole and an output hole which are connected to each other. The first shaft hole is connected to the first pump, and the second shaft hole is connected to the second pump. The chamber is provided with a check valve. The check valve is movable in the chamber and defines a first position and a second position. When the check valve is in the first position, the first The shaft hole is in communication with the output hole, and the second shaft hole is not in communication with the first shaft hole and the output hole, respectively. When the check valve is in the second position, the second shaft hole is connected with the output hole. The first shaft hole is not connected with the second shaft hole and the output hole respectively; a hot water absorption cold head, which Connected to the output hole of the nuclear valve; a heat-dissipating water-cooled row, the first end of which is connected to the water-cooling head, and the second end of which is connected to the water tank; a first circuit, when the check valve is in the first position The water tank, the first pump, the first shaft hole of the nuclear actuated valve, the output hole of the nuclear actuated valve, the hot-water absorption cold head and the heat-dissipating water-cooled row are connected; a second circuit, when the check valve In the second position, the water tank, the second pump, the second shaft hole of the nuclear valve, the output hole of the nuclear valve, the hot water absorption cold head and the heat dissipation water cooling system are in communication. The water-cooling device of the switchable pump circuit according to item 1 of the scope of the patent application, wherein the non-return valve has a nuclear actuator, and two ends of the nuclear actuator correspond to the first shaft hole and the second The shaft hole is provided with a first opening and a second opening. The nuclear member is provided with a baffle plate. The baffle plate is formed with a first blocking surface and a second corresponding to the first shaft hole and the second shaft hole, respectively. A blocking surface, the first blocking surface and the second blocking surface are respectively recessed with a conical groove, and the first opening and the first blocking surface have a first channel and at least one communicating with the first opening. A first perforation, the first channel communicating with the output hole, a second channel communicating with the second opening and at least one second perforation between the second opening and the second blocking surface, the second channel communicating with The output holes are in communication, wherein the length of the check valve along the long axis is shorter than the length of the body along the long axis. When the check valve is in the first position, the baffle closes the second channel, and the first A shaft hole, the first channel and the output hole are in communication with each other. In the two position, the baffle closes the first passage, and the second shaft hole, the second passage and the output hole are in communication. The water-cooling device of the switchable pump circuit according to item 2 of the scope of patent application, wherein the first shaft hole and the second shaft hole are respectively provided with an internal thread, the first shaft hole and the second shaft hole. Each positioning plug is provided with a positioning plug, each positioning plug has a first end and a second end, and a perforation is formed between the first end and the second end, and each positioning plug has an outer periphery. The wall is provided with a stopper at the first end, and the outer diameter of the stoppers is larger than the inner diameter of the first shaft hole and the second shaft hole, so that the stoppers can be stopped separately. In the first shaft hole and the second shaft hole, the outer peripheral wall of each positioning plug is respectively provided with a groove beside the stoppers, and the outer peripheral wall of each positioning plug is in the groove. Each side is provided with an external thread, so that the positioning plugs can be screwed into the internal threads of the first shaft hole and the second shaft hole. The grooves are respectively provided with a sealing ring, and the perforations are A stop section is provided at the first end. The inner diameter of the stop sections is larger than the inner diameter of the perforations. The hole is provided with a limiting section beside the stop section. The internal diameter of the limiting sections is smaller than the internal diameter of the perforations. The perforations are provided with a positioning section at the second end. The inner diameter of the positioning section is larger than the inner diameter of the perforations, and an enlarged diameter section is further provided between the positioning sections and the perforations. The inner diameter of the expanded section gradually increases toward the second end. According to the water-cooling device of the switchable pump circuit according to item 3 of the scope of patent application, wherein the perforation of each positioning plug head is provided with a rotary joint, the rotary joint has a first end and a second end. A through hole is formed between the first end and the second end. The first ends of the rotary joints form a screw head radially outward, and the screw head is a hole protruding from the positioning plug head. The through-hole is provided with an internal thread at the first end, and the rotary joints are further provided with a stop ring, the stop rings are respectively accommodated in the stop sections, and the stop rings are clamped in the stop sections. Between the screw head and the stopper, the second ends of the rotary joints are placed in the limit section, and a plurality of projections are convexly spaced apart from the peripheral wall of the second ends. The protruding block passes through the limiting section and is locked in the perforation, so that the rotary joint can rotate at the limiting section. According to the water-cooling device of the switchable pump circuit according to item 3 of the scope of the patent application, wherein the nuclear member is recessed with a ring groove, the ring groove is sleeved with a positioning ring, and the outer diameter of the positioning ring is less than The inner diameter of the positioning sections, and the outer diameter of the positioning ring is larger than the inner diameter of the expanded section. The water-cooling device of the switchable pump circuit according to item 2 of the scope of the patent application, wherein the nuclear member is provided with a damping member at each of the first opening and the second opening, and the damping member is the non-return At the end surfaces of the two ends of the valve, the size of the damping member can be increased by reducing the inner diameter of the first opening and the second opening, thereby increasing the damping value. The water-cooling device of the switchable pump circuit according to item 2 of the scope of the patent application, wherein the first shaft hole and the second shaft hole are respectively provided on two opposite sides of the body, and the first shaft hole and The central shaft of the second shaft hole is located on the same axis, and the check valve is provided with the baffle in a direction perpendicular to the axis.