JP4736470B2 - Self-priming pump and liquid supply apparatus having the same - Google Patents

Description

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

  Pumps are widely used for various applications, but in general, pumps having a self-priming function are often used for circulation of baths and the like.

  As shown in the sectional view of the conventional pump in FIG. 4, there is an electric motor 1, and a casing 3 is attached to one side thereof, and a rotating shaft 2 of the electric motor 1 is connected to an impeller 5 in the casing 3.

  A partition plate 6 and a packing 7 are disposed in the opening of the casing 3, and the impeller chamber 3 a is formed by being sealed by being fitted to the opening of the casing cover 4 via the partition plate 6 and the packing 7. is doing.

  As shown in the plan view of the casing partition plate of the conventional pump in FIG. 6, the partition plate 6 has a water flow passage circulation hole 6a, a circulation flow hole 6b or a central circulation hole 6c at a predetermined position, and a drain hole at the lowermost end. 6d is formed, and the packing 7 is configured to prevent water leakage from around the circulation hole 6a, the circulation hole 6b, the central circulation hole 6c, and the drainage hole 6d.

  4 and 5, the impeller 5 is accommodated in the impeller chamber 3a of the casing 3 as shown in the plan view of the casing impeller of the conventional pump.

  The rotating shaft 2 is projected at the center of the impeller chamber 3a, and the impeller 5 is mounted with the mechanical seal 8 sandwiched between the tip portion and the motor 1 and the impeller chamber 3a are sealed. ing.

  The casing 3 has an impeller chamber 3a and is provided with a discharge passage 3b for allowing water to flow out from the impeller chamber 3a to the delivery tank portion 3c.

  As shown in the plan view seen from the casing cover opening of the conventional pump in FIG. 7, a suction passage 4a and a water tank portion 4c communicating with the suction port 9 are formed in the casing cover 4, and the water tank portion 4c. An air / water separation chamber 4b communicating with the discharge port 10 is disposed on the upper portion of the air.

  The suction passage 4 a communicates with the impeller chamber 3 a of the casing 3 through the central flow hole 6 c of the partition plate 6.

  Next, in a hot water supply apparatus for a bathtub as an example of a liquid supply apparatus provided with the pump, a hot water supply incorporating a pump 14 and a heat exchanger 15 as shown in the schematic configuration diagram of the liquid supply apparatus provided with the conventional pump in FIG. There is a device 11, and a suction pipe 12 and a discharge pipe 13 are connected to the hot water supply device 11.

  The suction pipe 12 and the discharge pipe 13 are each connected to a bathtub 17, and a bathtub faucet 16 is attached to the bathtub 17, and water supplied to the bathtub 17 from the bathroom faucet 16 is circulated water 18. It is stored in.

  In the above configuration, the operation of the conventional pump and the liquid supply apparatus including the pump will be described with reference to FIGS.

  First, exhalation water is poured into the casing cover 4 in advance. The injected water enters the impeller chamber 3a. Further, circulating water 18 is poured into the bathtub 17 from the faucet 16 in the bathroom. Next, when the electric motor 1 is driven, the impeller 5 in the impeller chamber 3a rotates.

  When the impeller 5 rotates, the water in the impeller chamber 3a is stirred by the impeller 5, and at this time, bubbles are mixed into the water.

  The water mixed with air passes through the discharge passage 3b as shown by the arrow A and enters the delivery tank portion 3c, and further flows into the water tank portion 4c of the casing cover 4 through the flow hole 6a of the partition plate 6.

  An air / water separation chamber 4b is provided in the upper part of the water tank portion 4c in the casing cover 4, and water flowing out from the flow hole 6a of the partition plate 6 is separated into air and water in the air / water separation chamber 4b. The air is discharged from the discharge port 10 through the heat exchanger 15 through the discharge pipe 13 and into the bathtub 17 as shown by the arrow B.

  On the other hand, as shown by the arrow C, the remaining water returns from the water tank portion 4 c to the impeller chamber 3 a of the casing 3 through the circulation hole 6 b of the partition plate 6. That is, water circulates between the impeller chamber 3a and the water tank 4c, and only air flows out to the outside.

  When this state continues, the pressure gradually decreases in the central portion of the impeller chamber 3a and the suction passage 4a. And the circulating water 18 in the bathtub 17 is sucked up by the pressure difference between the pressure in the suction passage 4a and the outside.

When the circulating water 18 flows into the suction passage 4a from the suction port 9 through the suction pipe 12, a full water supply state is entered and the circulation operation is performed. The sucked circulating water 18 is heated by the heat exchanger 15, passes through the discharge pipe 13, returns to the bathtub 17, and is chased.
Japanese Utility Model Publication No. 03-83396

  However, in the pump described in (Patent Document 1) of the conventional technique, when the pump is installed in a hot water supply device, when the hot water supply device is installed at a position higher than the bathtub by wall hanging or the like, All the connection ports such as the return connection port and the primary water supply port are installed on the bottom surface of the water heater.

  For this reason, the suction port provided in the upper part of the pump must be raised upward once, and then the piping must be arranged toward the lower surface of the water heater, which increases the resistance of the piping and is sufficient. The amount of water and self-priming function could not be obtained.

The present invention solves such a conventional problem, and an object of the present invention is to provide a self-priming pump having a constantly required amount of water and a self-priming function and a liquid supply apparatus including the same.

For the liquid supply apparatus having a self-priming pump and its invention to achieve the above object, the casing having an opening with a built-in impeller for discharging the liquid sucked centrifugal direction from the rotation center side, the An electric motor having a rotary shaft that is a horizontal axis connected to the impeller for driving the impeller, and has an inlet portion through which liquid flows in and a discharge port through which liquid is discharged on the upper side. A blade having a connected casing cover, wherein the opening of the casing is fitted with the opening of the casing cover via a partition plate, and is enclosed by the casing and the partition plate and accommodates the impeller is cabin is formed, wherein the casing cover, bottom surface from the bottom surface of the casing cover of the liquid flowing from the inlet port for introducing to the top of the said casing cover A suction passage for introducing to the center portion in the casing cover through inlet passage and communicates downstream thereof with a predetermined width to any hand rotary shaft and vertical sides to be connected, said inlet of said casing cover A water tank portion including a portion other than the passage and the suction passage, and the partition plate is formed in a portion corresponding to a rotating tip portion of the impeller to communicate the impeller chamber and the water tank portion. At a position higher than the central insertion hole, a circulation hole for communicating the delivery tank part formed at the upper part of the impeller chamber and the steam / water separation chamber formed at the upper part of the water tank part, and the central insertion hole And a circulation hole formed and communicating with the impeller chamber and the water tank portion .

With this configuration, the suction port of the self-priming pump is disposed at the bottom end of the casing cover, and the liquid sucked up from the suction port disposed at the bottom end is introduced upward along the side surface of the casing cover. The effect that the pipe resistance can be reduced can be achieved.

The present invention has an effect that it is possible to provide a self-priming pump having a constantly required amount of water and a self-priming function and a liquid supply apparatus including the same.

An embodiment of a self-priming pump (hereinafter simply referred to as a pump) of the present invention has a casing with a built-in impeller for sucking and discharging liquid, and an electric motor for driving the impeller, and is arranged at an opening of the casing. A casing cover to which a suction port through which liquid flows in and a discharge port through which liquid is discharged is connected to the upper side, and in order to introduce the liquid flowing in from the suction port to the upper part in the casing cover, An inflow passage having a predetermined width is provided on either side surface from the bottom surface.

  As a result, the suction port of the pump is arranged at the lowest end of the casing cover, and the pipe resistance is reduced by introducing the liquid sucked up from the suction port arranged at the lowest end along the side of the casing cover. In addition, it is possible to provide a pump having an always necessary amount of water and a self-priming function.

  The inflow passage may be arranged such that the uppermost portion of the inflow passage is above the rotating tip of the impeller.

  Thereby, when a pump stops, since residual water can be ensured in a casing or a casing cover, the self-priming function of a pump can be improved more.

  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.

  Embodiments of the present invention will be described below with reference to the drawings.

Example 1
FIG. 1 is a sectional view of the pump shown in the first and second embodiments, FIG. 2 is a plan view seen from the opening of the casing cover of the pump shown in the first and second embodiments, and FIG. 3 shows the pump shown in the first and second embodiments. FIG. 1 is a schematic configuration diagram of a liquid supply apparatus equipped with an electric motor 1 as shown in FIGS. 1 to 3, and a casing 3 is attached to one side of the electric motor 1, and a rotating shaft 2 of the electric motor 1 is connected to an impeller in the casing 3. 5 is connected. The impeller 5 has a rotating tip 5 a at the center of the tip.

  A partition plate 6 and a packing 7 are disposed in the opening of the casing 3, and the impeller chamber 3 a is formed by being sealed by being fitted to the opening of the casing cover 4 via the partition plate 6 and the packing 7. is doing.

  The partition plate 6 is formed with a water flow passage circulation hole 6a, a circulation hole 6b or a central circulation hole 6c at a predetermined position, and a drainage hole 6d at the lowermost end. The packing 7 has these circulation holes 6a and circulation holes. 6b, the central flow hole 6c and the drain hole 6d are configured to prevent water leakage.

  The casing 3 has an impeller chamber 3a, and an impeller 5 is accommodated in the impeller chamber 3a.

  The rotating shaft 2 is projected at the center of the impeller chamber 3a, and the impeller 5 is mounted with the mechanical seal 8 sandwiched between the tip portion and the motor 1 and the impeller chamber 3a are sealed. ing.

  In the casing cover 4, a suction port 9 for sucking up from the bathtub 17 is disposed at the lowermost end of the casing cover 4, and the casing cover 4 is used to introduce the liquid flowing in from the suction port 9 to the upper part in the casing cover 4. An inflow passage 4d and a suction passage 4a having a predetermined width are formed on one of the side surfaces from the bottom surface within 4, and a water tank portion 4c is formed, and communicates with the discharge port 10 above the water tank portion 4c. A steam / water separation chamber 4b is arranged.

  The suction passage 4 a communicates with the impeller chamber 3 a of the casing 3 through the central flow hole 6 c of the partition plate 6.

  Next, in a hot water supply apparatus for a bathtub as an example of a liquid supply apparatus provided with the pump, there is a hot water supply apparatus 11 including a pump 14 and a heat exchanger 15 as shown in FIG. 3, and the hot water supply apparatus 11 includes a suction pipe 12. And the discharge piping 13 is connected.

  The suction pipe 12 and the discharge pipe 13 are each connected to a bathtub 17, and a bathtub faucet 16 is attached to the bathtub 17, and water supplied to the bathtub 17 from the bathroom faucet 16 is circulated water 18. It is stored in.

  In the above configuration, the operation of the pump of the present invention and the liquid supply apparatus including the pump will be described with reference to FIGS.

  First, exhalation water is poured into the casing cover 4 in advance. The injected water enters the impeller chamber 3a. Further, circulating water 18 is poured into the bathtub 17 from the faucet 16 in the bathroom. Next, when the electric motor 1 is driven, the impeller 5 in the impeller chamber 3a rotates.

  When the impeller 5 rotates, the water in the impeller chamber 3a is stirred by the impeller 5, and at this time, bubbles are mixed into the water.

  The water mixed with the air enters the delivery tank portion 3 c and further flows into the water tank portion 4 c of the casing cover 4 through the flow hole 6 a of the partition plate 6.

  An air / water separation chamber 4b is provided in the upper part of the water tank portion 4c in the casing cover 4, and water flowing out from the flow hole 6a of the partition plate 6 is separated into air and water in the air / water separation chamber 4b. The air is discharged from the discharge port 10 through the heat exchanger 15 through the discharge pipe 13 and into the bathtub 17 as shown by the arrow B.

  On the other hand, as shown by the arrow C, the remaining water returns from the water tank portion 4 c to the impeller chamber 3 a of the casing 3 through the circulation hole 6 b of the partition plate 6. That is, water circulates between the impeller chamber 3a and the water tank 4c, and only air flows out to the outside.

  When this state continues, the pressure gradually decreases in the central portion of the impeller chamber 3a and the suction passage 4a. And the circulating water 18 in the bathtub 17 is sucked up by the pressure difference between the pressure in the suction passage 4a and the outside.

  When the circulating water 18 flows into the suction passage 4a from the suction port 9 through the suction pipe 12 through the inflow passage 4d, a full-scale water supply state is entered and the circulation operation is performed. The sucked circulating water 18 is heated by the heat exchanger 15, passes through the discharge pipe 13, returns to the bathtub 17, and is chased.

  As described above, the suction port 9 for sucking up from the bathtub 17 can be disposed at the lowermost end of the casing cover 4 and the piping can be disposed from the lower surface of the water heater, the piping resistance is reduced, the amount of water, the self-priming This improves the efficiency of performance and reduces the number of parts on the pipe.

(Example 2)
As shown in FIGS. 1 to 3, there is an electric motor 1, and a casing 3 is attached to one side thereof, and a rotating shaft 2 of the electric motor 1 is connected to an impeller 5 in the casing 3. The impeller 5 has a rotating tip 5 a at the center of the tip.

  A partition plate 6 and a packing 7 are disposed in the opening of the casing 3, and the impeller chamber 3 a is formed by being sealed by being fitted to the opening of the casing cover 4 via the partition plate 6 and the packing 7. is doing.

  The partition plate 6 is formed with a water flow passage circulation hole 6a, a circulation hole 6b or a central circulation hole 6c at a predetermined position, and a drainage hole 6d at the lowermost end. The packing 7 has these circulation holes 6a and circulation holes. 6b, the central flow hole 6c and the drain hole 6d are configured to prevent water leakage.

  The casing 3 has an impeller chamber 3a, and an impeller 5 is accommodated in the impeller chamber 3a.

  The rotating shaft 2 is projected at the center of the impeller chamber 3a, and the impeller 5 is mounted with the mechanical seal 8 sandwiched between the tip portion and the motor 1 and the impeller chamber 3a are sealed. ing.

  In the casing cover 4, a suction port 9 for sucking up from the bathtub 17 is disposed at the lowermost end of the casing cover 4, and the casing cover 4 is used to introduce the liquid flowing in from the suction port 9 to the upper part in the casing cover 4. An inflow passage 4d and a suction passage 4a having a predetermined width are formed on one of the side surfaces from the bottom surface within 4, and a water tank portion 4c is formed, and communicates with the discharge port 10 above the water tank portion 4c. A steam / water separation chamber 4b is arranged.

  The inflow passage 4d may be arranged such that the uppermost portion of the inflow passage 4d is above the rotating tip 5a of the impeller 5.

  The suction passage 4 a communicates with the impeller chamber 3 a of the casing 3 through the central flow hole 6 c of the partition plate 6.

  Next, in a hot water supply apparatus for a bathtub as an example of a liquid supply apparatus provided with the pump, there is a hot water supply apparatus 11 including a pump 14 and a heat exchanger 15 as shown in FIG. 3, and the hot water supply apparatus 11 includes a suction pipe 12. And the discharge piping 13 is connected.

  The suction pipe 12 and the discharge pipe 13 are each connected to a bathtub 17, and a bathtub faucet 16 is attached to the bathtub 17, and water supplied to the bathtub 17 from the bathroom faucet 16 is circulated water 18. It is stored in.

  In the above configuration, the operation of the pump of the present invention and the liquid supply apparatus including the pump will be described with reference to FIGS.

  First, exhalation water is poured into the casing cover 4 in advance. The injected water enters the impeller chamber 3a. Further, circulating water 18 is poured into the bathtub 17 from the faucet 16 in the bathroom. Next, when the electric motor 1 is driven, the impeller 5 in the impeller chamber 3a rotates.

  When the impeller 5 rotates, the water in the impeller chamber 3a is stirred by the impeller 5, and at this time, bubbles are mixed into the water.

  The water mixed with the air enters the delivery tank portion 3 c and further flows into the water tank portion 4 c of the casing cover 4 through the flow hole 6 a of the partition plate 6.

  An air / water separation chamber 4b is provided in the upper part of the water tank portion 4c in the casing cover 4, and water flowing out from the flow hole 6a of the partition plate 6 is separated into air and water in the air / water separation chamber 4b. The air is discharged from the discharge port 10 through the heat exchanger 15 through the discharge pipe 13 and into the bathtub 17 as shown by the arrow B.

  On the other hand, as shown by the arrow C, the remaining water returns from the water tank portion 4 c to the impeller chamber 3 a of the casing 3 through the circulation hole 6 b of the partition plate 6. That is, water circulates between the impeller chamber 3a and the water tank 4c, and only air flows out to the outside.

  When this state continues, the pressure gradually decreases in the central portion of the impeller chamber 3a and the suction passage 4a. And the circulating water 18 in the bathtub 17 is sucked up by the pressure difference between the pressure in the suction passage 4a and the outside.

  When the circulating water 18 passes through the suction pipe 12 from the suction port 9 through the inflow passage 4d and flows into the suction passage 4a from above the rotating tip 5a of the impeller 5, the state changes to a full-scale water supply state, and circulation operation is performed. Become. The sucked circulating water 18 is heated by the heat exchanger 15, passes through the discharge pipe 13, returns to the bathtub 17, and is chased.

  As described above, the suction port 9 for sucking up from the bathtub 17 is arranged at the lowermost end of the casing cover 4, and the circulating water 18 sucked up from the suction port 9 flows into the side surface of the casing cover 4. By adopting a structure that flows upward along the passage 4d, even if water is dropped from the suction pipe 12 and the discharge pipe 13, the remaining water can be secured in the casing cover 4 and is useful in the self-priming operation.

  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.

Sectional drawing of the pump shown in Examples 1 and 2 The top view seen from the opening part of the casing cover of the pump shown in Example 1,2. Schematic configuration diagram of a liquid supply apparatus including a pump shown in Examples 1 and 2 Cross section of conventional pump Conventional pump casing-impeller plan view Conventional pump casing-partition plan view Plan view seen from casing cover opening of conventional pump Schematic configuration diagram of a liquid supply apparatus equipped with a conventional pump

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric motor 2 Rotating shaft 3 Casing 3a Impeller chamber 3b Discharge passage 3c Delivery tank part 4 Casing cover 4a Suction passage 4b Air-water separation chamber 4c Water tank part 4d Inflow passage 5 Impeller 5a Rotation tip part 6 Partition plate 6a Flow hole 6b Circulation hole 6c Central circulation hole 6d Drainage hole 7 Packing 8 Mechanical seal 9 Suction port 10 Discharge port 11 Hot water supply device 12 Suction pipe 13 Discharge pipe 14 Pump 15 Heat exchanger 16 Faucet 17 Bath 18 Circulating water

Claims (3)

A motor having a casing having an opening with a built-in impeller for discharging the liquid sucked centrifugal direction from the rotation center side, the rotational shaft serving as a horizontal shaft connected to the impeller to drive the impeller, opening comprising a suction port and a casing cover discharge port for discharging the liquid on the upper side is connected to the liquid flows into the lower side has a section, the opening of the casing cover the opening of the casing through the partition plate fitted DOO, said casing and said impeller chamber in which the impeller is surrounded by the partition plate is accommodated is formed, wherein the casing cover, an upper portion in the casing cover liquid that has flowed from the suction port the inlet passage and the underlying having a predetermined width to any hand rotational shaft perpendicular to side surfaces connecting the bottom surface of the casing cover to the bottom surface in order to introduce to A suction passage that leads to a central portion in the casing cover and a water tank portion that includes portions other than the inflow passage and the suction passage in the casing cover, and the partition plate includes the blades A central insertion hole formed at a portion corresponding to the rotating tip of the vehicle and communicating the impeller chamber and the water tank portion; a delivery tank portion formed at an upper portion of the impeller chamber; and an upper portion of the water tank portion A circulation hole that communicates with the air / water separation chamber formed on the outer periphery, and a circulation hole that is formed at a position higher than the central insertion hole and communicates the impeller chamber and the water tank portion. Self-priming pump. The self-priming pump according to claim 1, wherein the inflow passage has an uppermost portion of the inflow passage disposed above a rotating tip portion of the impeller. A liquid supply apparatus comprising the self-priming pump according to claim 1.

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