JP2006233762A - Pump and liquid supply device provided with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize and simplify a liquid supply device and provide a sanitary pump having high convenience property at low cost by providing a water introducing passage for introducing liquid from a predetermined place in a pump case into a suction part, providing a storage part for storing the liquid introduced into a predetermined place in the suction part from the water introducing passage, and providing a drain part for draining the liquid remaining in the storage part when the pump stops in a predetermined place on a lower side of the storage part. <P>SOLUTION: The water introducing passage 27 is brought into contact with an intake passage 22 continuously in the pump case 19 and is connected with the storage part 28 provided below a rotary shaft of an impeller. The drain part 29 for draining the liquid remaining in the storage part during the pump is stopped is provided in the storage part 28. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pump that is driven by a motor and sucks and discharges liquid, and a liquid supply apparatus including the pump.

In the pump, a liquid that is formed by a pump part having an impeller, and a front face of the pump part via auxiliary metal fittings and packing, and a suction passage defined by a peripheral discharge passage and a separation plate. A pump case having a suction part for sucking in and a discharge part for discharging liquid, and a motor part for driving the pump part, and the separation plate is returned to the front position of the flow flowing in through the suction passage A passage is formed, and an end of the separation plate on the discharge port side is bent toward the discharge port side. In the pump, a self-priming performance can be ensured even in a liquid supply apparatus constituted by pipes bent at several places.
Registered Utility Model No. 2569655

  However, when the pump described in (Patent Document 1) of the prior art is incorporated in a hot water supply device having an automatic hot water filling function, for example, hot water is provided in the suction portion of the pump case in order to secure a water supply path when hot water is filled. It is necessary to install a switching valve and switching valve control device for switching between the water conduit for water supply for tensioning and the suction passage for additional cooking circulation, and to install complicated water conduits. It becomes complicated and leads to an increase in cost.

  In order to achieve the above object, the present invention provides a pump unit having an impeller for sucking and discharging liquid, a pump case incorporating a suction unit for sucking liquid and a discharge unit for discharging liquid, and a motor for driving the pump unit Provided with a water conduit that introduces liquid from a predetermined location of the pump case to the suction portion, and provided with a storage portion that stores the liquid introduced from the water conduit at a predetermined location in the suction portion. It is characterized by.

  With this configuration, the liquid introduced from the water conduit is stored in a predetermined location in the suction portion through the water conduit for introducing the liquid from the predetermined location of the pump case to the suction portion. By connecting to the storage section, the switching valve and the switching valve control device can be eliminated, the water conduit is simplified, the simplification can be realized together with the miniaturization of the hot water supply device, and the cost reduction can be achieved.

  The present invention can eliminate the switching valve and the switching valve control device, simplifies the water conduit, and provides a highly convenient and low-cost pump that can be simplified along with downsizing the liquid supply device. .

  An embodiment of the present invention includes a pump unit including an impeller for sucking and discharging liquid, a pump case including a suction unit for sucking liquid and a discharge unit for discharging liquid, and a motor unit for driving the pump unit. And having a water conduit for introducing liquid from a predetermined location of the pump case to the suction portion, and providing a storage portion for storing the liquid introduced from the water conduit at a predetermined location in the suction portion.

  Thereby, the switching valve and the switching valve control device can be abolished, and the water conduit is simplified, and a highly convenient and low-cost pump that can be simplified along with downsizing of the liquid supply device can be provided.

  Moreover, you may make it provide the discharge part for discharging | emitting the liquid which has stayed in the storage part when the pump has stopped in the predetermined place below the storage part.

  In this case, when the pump is stopped, the liquid in the water conduit can be easily discharged, and the propagation of germs in the pipe and freezing in the winter can be prevented.

  Further, the storage part may be provided in the suction part and below the rotating shaft of the impeller, and the water conduit may be connected to a predetermined place of the storage part.

  As a result, the distance of the water conduit becomes shorter, the volume of the staying liquid decreases, and the liquid in the water conduit can be discharged earlier when the pump is stopped.

  And if the said pump is integrated in liquid supply apparatuses, such as a water supply apparatus, the usability of a liquid supply apparatus can be improved greatly.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in the overall schematic diagram of the bathtub water circulation device shown in the first, second and third embodiments shown in FIG. 1, there is a bathtub 1, and the bathtub water 2 in the bathtub 1 is sucked outside the bathtub 1. A pump 3 for discharging and a heating unit 4 using gas, electricity or kerosene for heating the bathtub water 2 are installed. An outlet 5 for bathtub water 2 is attached to the side surface of the lower part of the bathtub 1, and a circulation forward path 6 is connected to the outlet 5. A pump 3 is attached in the middle of the circulation path 6. The pump 3 is connected to a hot water conduit 9 provided with an electromagnetic valve. A heating unit 4 is attached in the middle of the circulation return path 7 connected to the pump 3.

  The circulation return path 7 is connected to an inflow port 8 mounted on the side surface of the bathtub 1 and above the outflow port 5.

  As shown in the cross-sectional view of the pump shown in Embodiments 1, 2, and 3 in FIG. 2 and the longitudinal front view of the pump shown in Embodiment 1 in FIG. The casing 13 of the pump unit 12 is integrally connected via the. The shaft 14 of the motor unit 10 is inserted into the casing 13, and an impeller 15 is integrally connected to the tip of the motor unit 10 with a mechanical seal 16 interposed therebetween.

  Further, the front opening of the casing 13 is closed by an auxiliary metal fitting 18 that is installed via a packing 17, and the pump case 19 is closed by the auxiliary metal fitting 18 with the auxiliary metal fitting 18 interposed therebetween. Has been placed.

  The pump case 19 is formed with a suction portion 20 and a discharge portion 21. The suction portion 20 is linked to the suction side of the impeller 15 via the suction passage 22 of the pump case 19, and the discharge portion 21 is connected to the discharge passage. It is opened in a pump case 19 having 23, and is further communicated with the discharge side of the impeller 15 through a reflux hole 24 formed in the auxiliary metal fitting 18.

  Reference numeral 25 denotes an impeller suction port. The suction passage 22 extends radially from the impeller suction port 25 in a constant cross section.

  The suction passage 22 and the surrounding discharge passage 23 are defined by a separating plate 26. The upper surface of the separation plate 26 extends to the vicinity of the suction portion 20 and is bent toward the discharge port side.

  In addition, a water conduit 27 is connected to the pump case 19 to a reservoir 28 connected to the suction passage 22.

  In the above configuration, the operation of the pump in the first embodiment and the bathtub water circulation device including the pump will be described with reference to FIGS. 1 to 3.

  First, the solenoid valve of the hot water conduit 9 provided with the solenoid valve is opened and water supply is started. The supplied water flows into the pump 3 from the reservoir 28 connected to the suction passage 22 through the water conduit 27. The inflowing water passes through the suction passage 22 and flows out from the outflow port 5 to the bathtub 1 through the circulation forward path 6.

  Further, the air flows from the impeller inlet 25 through the impeller 15, through the discharge passage 23, through the circulation return path 7, and also to the bathtub 1. When the bathtub 1 is full of water, the solenoid valve of the hot water conduit 9 provided with the solenoid valve is closed and the water supply is finished.

  Next, the motor unit 10 is driven and the shaft 14 is rotationally driven. When the shaft 14 is driven to rotate, the impeller 15 connected to the tip of the shaft 14 is also driven to rotate, thereby driving the pump 3.

  When the pump 3 is driven, the bathtub water 2 flows into the circulation forward path 6 from the outlet 5 attached to the lower side surface of the bathtub 1, flows through the circulation forward path 6 and is installed in the pump case 19 of the pump 3. 20 is sucked into the pump 3.

  At this time, the air remaining in the circulation forward path 6 is separated into air and water by the rotation of the impeller 15, and the air passes through the discharge portion 21 from the discharge passage 23 and passes through the discharge portion 21 as indicated by an arrow a before the water. It is discharged from the inflow port 8 to the bathtub 1 via.

  On the other hand, water and a small amount of residual air pass through the discharge passage 23 and return to the impeller 15 through the return hole 24 of the auxiliary fitting 18 as indicated by an arrow b. By repeating the above operation, the air remaining in the circulation forward path 6 is released to the atmosphere through the bathtub 1.

  The bath water 2 discharged to the circulation return path 7 from the discharge section 21 installed in the pump case 19 of the pump 3 is introduced into the heating section 4 using gas, electricity, kerosene, or the like connected to the circulation return path 7 and has a predetermined value. After being heated to the temperature, it flows through the circulation return path 7 connected to the heating unit 4 and flows into the bathtub 1 from the inlet 8 attached to the upper side of the outlet 5 on the side surface of the bathtub 1.

  In this way, the bathtub water 2 is circulated by using the pump 3 and heated to a predetermined temperature in the heating unit 4, thereby heating the bathtub water 2 in the bathtub 1 to a predetermined temperature, and the bathtub water after the heating. By continuing the circulation of 2, it becomes possible to always maintain the temperature of the bath water 2 at a predetermined temperature.

  As described above, according to the first embodiment, a series of hot water guide pipes 9 provided with solenoid valves are connected to a water guide path 27 connected to a reservoir 28 connected to the suction path 22. It is possible to switch from the water supply operation to the pump operation operation without using a switching valve during operation.

  Therefore, the switching valve and the switching valve control device can be eliminated, the water conduit is simplified, and a convenient and low-cost pump that can be simplified along with downsizing of the liquid supply device can be provided.

(Embodiment 2)
As shown in FIG. 1, there is a bathtub 1, and on the outside of the bathtub 1, a pump 3 for sucking and discharging bathtub water 2 in the bathtub 1, and gas or electricity for heating the bathtub water 2 or A heating unit 4 using kerosene or the like is installed.

  An outlet 5 for bathtub water 2 is attached to the side surface of the lower part of the bathtub 1, and a circulation forward path 6 is connected to the outlet 5. A pump 3 is attached in the middle of the circulation path 6. The pump 3 is connected with a hot water conduit 9 provided with an electromagnetic valve. A heating unit 4 is attached in the middle of the circulation return path 7 connected to the pump 3.

  The circulation return path 7 is connected to an inflow port 8 mounted on the side surface of the bathtub 1 and above the outflow port 5.

  As shown in the longitudinal sectional front view of the pump shown in FIG. 2 and Embodiment 2 of FIG. 4, reference numeral 10 denotes a motor unit, and a casing 13 of the pump unit 12 is integrally connected via a support fitting 11. ing. The shaft 14 of the motor unit 10 is inserted into the casing 13, and an impeller 15 is integrally connected to the tip of the motor unit 10 with a mechanical seal 16 interposed therebetween.

  Further, the front opening of the casing 13 is closed by an auxiliary metal fitting 18 that is installed via a packing 17, and the pump case 19 is closed by the auxiliary metal fitting 18 with the auxiliary metal fitting 18 interposed therebetween. Has been placed.

  The pump case 19 is formed with a suction portion 20 and a discharge portion 21. The suction portion 20 is linked to the suction side of the impeller 15 via the suction passage 22 of the pump case 19, and the discharge portion 21 is connected to the discharge passage. It is opened in a pump case 19 having 23, and is further communicated with the discharge side of the impeller 15 through a reflux hole 24 formed in the auxiliary metal fitting 18.

  Reference numeral 25 denotes an impeller suction port. The suction passage 22 extends radially from the impeller suction port 25 in a constant cross section. The suction passage 22 and the surrounding discharge passage 23 are defined by a separating plate 26. The upper surface of the separation plate 26 extends to the vicinity of the suction portion 20 and is bent toward the discharge port side.

  In addition, a water conduit 27 is connected to the pump case 19 to a reservoir 28 connected to the suction passage 22. The storage part 28 is provided with a discharge part 29 for discharging the liquid staying in the storage part when the pump is stopped.

  In the above configuration, the operation of the pump in the second embodiment and the bathtub water circulation device including the pump will be described with reference to FIGS. 1, 2, and 4.

  First, the solenoid valve of the hot water conduit 9 provided with the solenoid valve is opened and water supply is started. The supplied water flows into the pump 3 from the reservoir 28 connected to the suction passage 22 through the water conduit 27. The inflowing water passes through the suction passage 22 and flows out from the outflow port 5 to the bathtub 1 through the circulation forward path 6.

  Further, the air flows from the impeller inlet 25 through the impeller 15, through the discharge passage 23, through the circulation return path 7, and also to the bathtub 1. When the bathtub 1 is full of water, the solenoid valve of the hot water conduit 9 provided with the solenoid valve is closed and the water supply is finished.

  Next, the motor unit 10 is driven and the shaft 14 is rotationally driven. When the shaft 14 is driven to rotate, the impeller 15 connected to the tip of the shaft 14 is also driven to rotate, thereby driving the pump 3.

  When the pump 3 is driven, the bathtub water 2 flows into the circulation forward path 6 from the outlet 5 attached to the lower side surface of the bathtub 1, flows through the circulation forward path 6 and is installed in the pump case 19 of the pump 3. 20 is sucked into the pump 3.

  At this time, the air remaining in the circulation forward path 6 is separated into air and water by the rotation of the impeller 15, and the air passes through the discharge portion 21 from the discharge passage 23 and passes through the discharge portion 21 as indicated by an arrow a before the water. It is discharged from the inflow port 8 to the bathtub 1 via.

  On the other hand, water and a small amount of residual air pass through the discharge passage 23 and return to the impeller 15 through the return hole 24 of the auxiliary fitting 18 as indicated by an arrow b. By repeating the above operation, the air remaining in the circulation forward path 6 is released to the atmosphere through the bathtub 1.

  The bath water 2 discharged to the circulation return path 7 from the discharge section 21 installed in the pump case 19 of the pump 3 is introduced into the heating section 4 using gas, electricity, kerosene or the like connected to the circulation return path 7 and is supplied with a predetermined amount. After being heated to the temperature, it flows through the circulation return path 7 connected to the heating unit 4 and flows into the bathtub 1 from the inlet 8 attached to the upper side of the outlet 5 on the side surface of the bathtub 1.

  In this way, the bathtub water 2 is circulated by using the pump 3 and heated to a predetermined temperature in the heating unit 4, thereby heating the bathtub water 2 in the bathtub 1 to a predetermined temperature, and the bathtub water after the heating. By continuing the circulation of 2, it becomes possible to always maintain the temperature of the bath water 2 at a predetermined temperature.

  When the bath water 2 in the bathtub 1 is drained after bathing, the bath water 2 in the pump 3 is circulated from the discharge port 21 installed in the pump case 19 via the circulation return path 7 and from the inlet 8 and the suction unit 20 to the circulation forward path. 6 is discharged from the outlet 5 into the bathtub 1 through 6. At this time, the bathtub water 2 staying in the water conduit 27 and the reservoir 28 is discharged to the discharge passage 23 through the discharge portion 29 and is discharged from the discharge portion discharge portion 21 through the circulation return passage 7 and from the inlet 8 to the bathtub 1. It is discharged inside.

  As described above, according to the second embodiment, the liquid in the water conduit can be easily discharged when the pump is stopped.

  Therefore, it is possible to prevent the propagation of various germs in the piping and the freezing in the winter season, so that a hygienic and convenient low-cost pump can be provided.

(Embodiment 3)
As shown in FIG. 1, there is a bathtub 1, and on the outside of the bathtub 1, a pump 3 for sucking and discharging bathtub water 2 in the bathtub 1, and gas or electricity for heating the bathtub water 2 or A heating unit 4 using kerosene or the like is installed.

  An outlet 5 for bathtub water 2 is attached to the side surface of the lower part of the bathtub 1, and a circulation forward path 6 is connected to the outlet 5. A pump 3 is attached in the middle of the circulation path 6. The pump 3 is connected with a hot water conduit 9 provided with an electromagnetic valve. A heating unit 4 is attached in the middle of the circulation return path 7 connected to the pump 3.

  The circulation return path 7 is connected to an inflow port 8 mounted on the side surface of the bathtub 1 and above the outflow port 5.

  As shown in the longitudinal sectional front view of the pump shown in FIG. 2 and Embodiment 3 of FIG. 5, reference numeral 10 denotes a motor unit, and a casing 13 of the pump unit 12 is integrally connected via a support fitting 11. ing. The shaft 14 of the motor unit 10 protrudes into the casing 13, and an impeller 15 is integrally connected to the tip of the motor unit 10 with a mechanical seal 16 interposed therebetween.

  Further, the front opening of the casing 13 is closed by an auxiliary metal fitting 18 that is installed via a packing 17, and the pump case 19 is closed by the auxiliary metal fitting 18 with the auxiliary metal fitting 18 interposed therebetween. Has been placed.

  The pump case 19 is formed with a suction portion 20 and a discharge portion 21. The suction portion 20 is linked to the suction side of the impeller 15 via the suction passage 22 of the pump case 19, and the discharge portion 21 is connected to the discharge passage. It is opened in a pump case 19 having 23, and is further communicated with the discharge side of the impeller 15 through a reflux hole 24 formed in the auxiliary metal fitting 18. Reference numeral 25 denotes an impeller suction port. The suction passage 22 extends radially from the impeller suction port 25 in a constant cross section.

  The suction passage 22 and the surrounding discharge passage 23 are defined by a separating plate 26. The upper surface of the separation plate 26 extends to the vicinity of the suction portion 20 and is bent toward the discharge port side.

  Further, a water guide path 27 is connected to the suction passage 22 in the pump case 19 and is connected to a storage portion 28 provided below the rotating shaft of the impeller 15. The storage part 28 is provided with a discharge part 29 for discharging the liquid staying in the storage part when the pump 3 is stopped.

  In the above configuration, the operation of the pump in the third embodiment and the bathtub water circulation device including the pump will be described with reference to FIGS. 1, 2, and 5.

  First, the solenoid valve of the hot water conduit 9 provided with the solenoid valve is opened and water supply is started. The supplied water flows into the pump 3 from the reservoir 28 connected to the suction passage 22 through the water conduit 27. The inflowing water passes through the suction passage 22 and flows out from the outflow port 5 to the bathtub 1 through the circulation forward path 6.

  Further, the air flows from the impeller inlet 25 through the impeller 15, through the discharge passage 23, through the circulation return path 7, and also to the bathtub 1. When the bathtub 1 is full of water, the solenoid valve of the hot water conduit 9 provided with the solenoid valve is closed and the water supply is finished.

  Next, the motor unit 10 is driven and the shaft 14 is rotationally driven. When the shaft 14 is driven to rotate, the impeller 15 connected to the tip of the shaft 14 is also driven to rotate, thereby driving the pump 3.

  When the pump 3 is driven, the bathtub water 2 flows into the circulation forward path 6 from the outlet 5 attached to the lower side surface of the bathtub 1, flows through the circulation forward path 6 and is installed in the pump case 19 of the pump 3. 20 is sucked into the pump 3.

  At this time, the air remaining in the circulation forward path 6 is separated into air and water by the rotation of the impeller 15, and the air passes through the discharge portion 21 from the discharge passage 23 and passes through the discharge portion 21 as indicated by an arrow a before the water. It is discharged from the inflow port 8 to the bathtub 1 via.

  On the other hand, water and a small amount of residual air pass through the discharge passage 23 and return to the impeller 15 through the return hole 24 of the auxiliary fitting 18 as indicated by an arrow b. By repeating the above operation, the air remaining in the circulation forward path 6 is released to the atmosphere through the bathtub 1.

  The bath water 2 discharged to the circulation return path 7 from the discharge section 21 installed in the pump case 19 of the pump 3 is introduced into the heating section 4 using gas, electricity, kerosene or the like connected to the circulation return path 7 and is supplied with a predetermined amount. After being heated to the temperature, it flows through the circulation return path 7 connected to the heating unit 4 and flows into the bathtub 1 from the inlet 8 attached to the upper side of the outlet 5 on the side surface of the bathtub 1.

  In this way, the bathtub water 2 is circulated by using the pump 3 and heated to a predetermined temperature in the heating unit 4, thereby heating the bathtub water 2 in the bathtub 1 to a predetermined temperature, and the bathtub water after the heating. By continuing the circulation of 2, it becomes possible to always maintain the temperature of the bath water 2 at a predetermined temperature.

  When the bath water 2 in the bathtub 1 is drained after bathing, the bath water 2 in the pump 3 is circulated from the discharge port 21 installed in the pump case 19 via the circulation return path 7 and from the inlet 8 and the suction unit 20 to the circulation forward path. 6 is discharged from the outlet 5 into the bathtub 1 through 6.

  At this time, the bathtub water 2 staying in the water conduit 27 and the reservoir 28 is discharged to the discharge passage 23 through the discharge portion 29 and is discharged from the discharge portion 21 into the bathtub 1 through the circulation return path 7 and from the inlet 8. And discharged.

  As described above, according to the third embodiment, the distance of the water conduit 27 is shortened and the volume of the bathtub water 2 that is staying is reduced, and the liquid in the water conduit is more quickly supplied when the pump 3 is stopped. It can be easily discharged.

  Therefore, propagation of various germs in the pipe and freezing in the winter can be prevented, so that the hygienic and convenient low-cost pump 3 can be provided.

  In the above embodiment, the reservoir 28 can be set at any position. The shape of the discharge portion 29 may be any hole such as an O shape, a square shape, or a semi-elliptical shape, or a pipe may be installed, and the storage portion 28 and the discharge passage 23 are formed in the separation plate 26. What is necessary is just to be connected by the channel | path.

  In the first embodiment, the storage unit 28 is formed above the rotation axis of the impeller 15, but may be formed below the rotation axis of the impeller 15 as in the third embodiment.

  In the second embodiment and the third embodiment, the shape of the discharge portion 29 is a notch shape, but may be any hole such as an O shape, a square shape, or a semi-elliptical shape, and a pipe may be installed. .

  The pump of the present invention can be expected to be applied to various pumps used in, for example, fuel cell devices and heat pump devices.

Overall schematic diagram of bathtub water circulation device shown in embodiments 1, 2, and 3 Cross-sectional view of pump shown in embodiments 1, 2, and 3 Longitudinal front view of the pump shown in the first embodiment Longitudinal front view of the pump shown in the second embodiment Longitudinal front view of the pump shown in the third embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bathtub 2 Bath water 3 Pump 4 Heating part 5 Outlet 6 Circulation forward path 7 Circulation return path 8 Inlet 9 Hot water filled conduit provided with solenoid valve 10 Motor part 11 Indicator metal 12 Pump part 13 Casing 14 Shaft 15 Impeller 16 Mechanical seal 17 Packing 18 Auxiliary metal fitting 19 Pump case 20 Suction part 21 Discharge part 22 Suction path 23 Discharge path 24 Recirculation hole 25 Impeller suction port 26 Separator plate 27 Water conduit 28 Storage part 29 Discharge part

Claims (4)

A pump unit having an impeller for sucking and discharging liquid, a pump case having a suction unit for sucking liquid and a discharge unit for discharging liquid, and a motor unit for driving the pump unit, A pump comprising: a water conduit that introduces liquid from the location to the suction portion, and a storage portion that stores the liquid introduced from the water conduit at a predetermined location in the suction portion. 2. The pump according to claim 1, wherein a discharge portion for discharging the liquid staying in the storage portion when the pump is stopped is provided at a predetermined position below the storage portion. 3. The pump according to claim 1, wherein the storage portion is provided in the suction portion and below the rotation shaft of the impeller, and the water conduit is connected to a predetermined location of the storage portion. A liquid supply apparatus comprising the pump according to claim 1.

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