TWI435004B - Impeller assembly and boiler equipped with the same - Google Patents

Description

Warm water boiler with easy assembly of impeller assembly

The invention relates to an impeller assembly for improving the combination mode of an impeller and a magnet. The impeller assembly of the invention introduces a guide member which is coupled to the inner circumferential surface of the magnet and is screwed with the end portion of the impeller, thereby effectively preventing the magnet from being caused by an external force. The problem of cracks on the inner peripheral surface is not only easy to load and unload, but also suitable for chemical, medical, and food applications without using metallic parts.

The invention also discloses a warm water boiler suitable for the impeller assembly.

A magnet incorporated in an existing BLDC (brushless direct current) pump or a magnet pump impeller has a weak characteristic for impact or application of pressure on the inner peripheral surface, and the crack thus caused often causes a problem.

Even if it is made of a PPS (poly(phenylene sulfide)) material, the damage of the magnet cannot be improved.

In order to prevent the damage phenomenon, the prior art performs bonding, ultrasonic fusion, embedded injection two-color injection, and embedded injection using a punching machine for the impeller-magnet assembly (referred to as "impeller assembly" in this specification) (Press) ) The iron cylinder is pressed into the outer peripheral surface and the like.

However, the treatment method still has many shortcomings. Taking the bonding as an example, the adhesive is uniformly applied to the inner peripheral surface of the magnet or the outer peripheral surface of the impeller, and then combined with each other, and then It is applied in a furnace or a dryer to complete the hardening process of the binder. However, at this time, additional processing is required due to the exposure of the bonding agent, or the bonding force is lowered due to uneven bonding of the bonding sites.

Ultrasonic fusion is similar to bonding. After the magnet is added to the impeller, the ultrasonic fusion treatment is performed. However, the damage of the magnet caused by the ultrasonic wave cannot be avoided, and it cannot be disassembled for maintenance.

The embedded injection method embeds a magnet when the impeller is fired. This method has no problem in the strength of the outer peripheral surface or the upper and lower surfaces of the magnet of the cylindrical structure, but there is a problem in the stress or impact resistance of the inner peripheral surface. Cracks occur when the inner peripheral surface is filled with the injection material and the injection pressure is applied.

In order to solve the above problem, the amount of the injection material is reduced as much as possible, and only a part of the injection material is filled in the inner circumferential surface of the magnet, and then the nail is fixed. However, even if the amount of the injection material is reduced, the crack caused by the pressure applied during the injection molding cannot be solved. problem.

When the molding operation is performed using the minimum injection pressure, the density and compactness of the injection material are lowered by the low pressure molding, whereby the unformed product is generated, or the compactness of the injection of the fixable magnet is lowered to cause the magnet to be detached.

Moreover, in order to protect the magnet during injection molding from being affected by the filling pressure of the inner peripheral surface, it is necessary to hold the outer peripheral surface of the magnet tightly, and in view of the roundness requirement of the outer cylindrical surface of the magnet product, it is necessary to additionally process the outer circumference thereof. Face to eliminate the phenomenon of uneven roundness. This will increase manufacturing costs and reduce productivity.

The two-color injection method is similar to the embedded injection method, except that the injection material will be filled. To the outer perimeter.

First, in the same manner as the embedded injection method, the magnet is inserted into the first stage mold of the impeller, and then the injection operation is performed. At this time, the inner peripheral surface and the outer peripheral surface of the magnet are not filled with the injection material, and only a part of the injection is filled.

The remainder is then formed after the second section of the mold is embedded in the impeller.

Since the inner peripheral surface and the outer peripheral surface are all coated with the injection material, the appearance of the magnet does not appear to be cracked, but it is applied only to the projection on most of the outer peripheral surface without exhibiting the magnet crack, but actually The upper crack still exists.

When the product is used for a long period of time, the hidden internal magnet crack will increase the crack and cause a malfunction as the strength of the injection applied to the outer peripheral surface is weakened during use.

Moreover, the aspect ratio not only requires preparation of the first stage mold and the second stage mold, but also causes problems of reduced productivity and increased manufacturing cost due to the two processes.

As for the way in which the iron cylinder is coupled to the outer peripheral surface by using a press machine, in order to solve the problem of cracking due to external force on the inner peripheral surface of the magnet, it is necessary to improve the structure and use complicated processes and parts, thereby greatly reducing the productivity and unit price competition. force.

When the magnet is forcibly pressed into the iron cylinder and then inserted into the iron cylinder, the iron cylinder strongly holds the magnet and can avoid the crack caused by the pressure applied to the inner circumferential surface during the molding, but the metal cylinder is made of metal and is formed at the time of molding. It is easy to cause defects such as scratches or indentations in the mold core, and it is difficult to apply to chemical, medical, and food applications with the introduction of metal materials.

Referring to Fig. 1, a water tank W is disposed inside the casing B1 of the warm water boiler B (especially the existing small-sized warm water boiler suitable for the domestic warm water pad), and the water in the water tank W is heated by the heater H and is subjected to the pump. The drive of P is circulated by a pipe connecting the discharge port W1.

As the warm water of the boiler is heated from normal temperature to high temperature, the volume of dissolved oxygen in the warm water also increases and bubbles appear. If the inevitable bubble is not effectively and smoothly circulated, it will be in the operation of the pump. Colliding with the pumping member, especially with the impeller, causes the air bubbles to burst and generate noise.

When the bubbles continue to accumulate, cavitation is also formed.

Moreover, like a warm water pad, when the heating pipe is long and the diameter is small, it is more difficult to eliminate the air bubbles because the pipe resistance is large and the warm water circulation is hindered.

Therefore, the elimination of the circulation of the bubbles has a great influence on the quality of the small electric boiler.

Even if the pump is located outside the water tank, or if the pump is located inside the water tank and is placed near the bottom surface and the motor is horizontally arranged, as long as the water level is not reached, it can cover the horizontally arranged pumping members (when the critical water level is higher than the vertical arrangement) The degree of critical water level will cause noise due to idling, and noise will affect sleep quality.

If an external pump is used, particles such as calcareous components naturally contained in the water will be affected by their own weight and will fall and harden to form scale, which will cause noise and affect motor performance when formed on the motor shaft.

Problems caused by scale will be more serious when used at any time.

Moreover, the existing external pump is subjected to the load caused by the water pressure of the filling tank for a long time, and the water pressure changes with the water level, so the water pressure load of the motor is also followed. The change accelerates the motor.

The main object of the present invention is to provide an impeller assembly which introduces a guide member which is coupled to the inner peripheral surface of the magnet and is screwed with the end portion of the impeller, thereby effectively preventing the inner peripheral surface of the magnet from being caused by an external force. The problem of cracking is not only easy to load and unload, but also suitable for chemical, medical and food applications without using metallic parts. It solves the problems of bonding, ultrasonic fusion, embedded injection two-color injection, and embedded injection in the prior art. The press machine presses the iron cylinder into the outer peripheral surface and other problems.

According to the present invention, the joint portion of the guide member and the magnet forms a male-female joint portion that engages with each other, and the loading and unloading operation can be performed very conveniently.

A secondary object of the present invention is to provide a warm water boiler suitable for the impeller assembly. A recirculation hole is formed around the water outlet of the pump casing of the warm water boiler of the present invention to facilitate the elimination of the circulation of the bubbles, and the discharged bubbles are re-recovered. By circulating into the water tank, the problem of maintaining watertightness is eliminated, and air bubbles can be eliminated more smoothly.

Another secondary object of the present invention is to provide a boiler suitable for the impeller assembly, which forms an air passage on the motor to facilitate the elimination of the circulation of the bubbles, and the discharged bubbles are recirculated into the water tank to avoid watertightness. The problem is to eliminate bubbles more smoothly.

Another secondary objective of the present invention is to improve productivity and reduce manufacturing costs. The hollow inner circumferential surface of the socket is divided into a bearing contact portion and a non-contact portion of the bearing to be doubled (splined), and it is not necessary to perform precise reworking on the bearing contact portion on the bearing seat combined with the bearing supporting the motor drive shaft or Also make other parts.

In order to achieve the object, an impeller assembly in which the assemblyability of the present invention is effectively improved includes: an impeller having a wing portion and a fastening portion; a guide member having a corresponding fastening portion that can be coupled with the fastening portion of the impeller; and a magnet , disposed on the outer circumference of the guide.

The impeller assembly with improved assemblyability of the present invention forms a male-female joint portion of the joint between the guide member and the magnet, and the hollow inner wall constituting the magnet forms a male joint portion. The motor has a ventilation path.

The boiler of the present invention comprises: a water tank having a spouting port and a recovery port; a pump built in the water tank, the casing comprising a water inlet having a water inlet and a connection spout, and a pumping member built in the casing; and a motor; Having a drive shaft coupled to the pumping member; wherein the pumping member of the pump is an impeller, the impeller, the magnet of the motor, and a guide member that can be combined with a magnet and an impeller to form an impeller assembly The impeller has a fastening portion, and the guide has a corresponding fastening portion combined with the fastening portion, and the magnet is disposed on an outer circumferential surface of the guide.

The warm water boiler of the present invention forms a recirculation hole around the water outlet of the pump casing.

The motor has a venting path that is arranged between a stator of the motor and a rotor.

The drive shaft of the motor of the warm water boiler of the present invention is supported by a bearing, the bearing Combined with the bearing housing, the bearing housing includes: a plurality of bearing contact portions, and a plurality of bearing non-contact portions disposed between the contact portions and recessed therebetween.

As described above, the impeller assembly in which the assembly performance is effectively improved introduces a guide member which is coupled to the inner peripheral surface of the magnet and is screwed to the end portion of the impeller, thereby effectively preventing the inner peripheral surface of the magnet from being caused by an external force. The problem of cracking is not only easy to load and unload, but also suitable for chemical, medical and food applications without using metallic parts. It solves the prior art bonding, ultrasonic fusion, embedded injection two-color injection, and embedded injection. After that, the press machine is used to press the iron cylinder into the outer peripheral surface and other problems. Further, a male-female joint portion that engages with each other is formed on the joint surface of the guide member and the magnet, so that the loading and unloading can be facilitated.

The warm water boiler of the invention forms a recirculation hole around the water outlet of the pump casing, which can prevent the efficiency of the suction force of the pump from being lowered, the noise caused by the air bubbles, the vibration caused by the unstable flow caused by the air bubbles, and the greenhouse The efficiency of the greenhouse caused by the air bubbles in the piping is reduced, the heat generated by the impeller support shaft is insufficiently lubricated, the abrasion amount caused by the friction is increased, and the noise and the malfunction caused by the heat of the bearing portion are caused.

The warm water boiler of the present invention divides the hollow inner peripheral surface of the bearing seat supporting the motor drive shaft into a non-contact portion of the bearing and performs double-spinning, so that it is not necessary to perform precise reworking of the bearing contact portion or add other parts. Therefore, productivity can be improved and manufacturing costs can be reduced.

When the pump of the warm water boiler of the present invention uses the diaphragm pump, not only the diaphragm of the existing diaphragm pump and the pumping member are separated, but also the diaphragm and the cover member and the retainer arranged on both sides thereof. The surface is introduced into the concave and convex portions which are in mesh with each other, thereby enhancing the sealing property and preventing water leakage.

The invention will be described in detail below with reference to the accompanying drawings.

The same symbols in the various drawings, especially the symbols with the same number of tens and single digits, or ten digits, single digits and English letters, indicate components having the same function. If not specified, the components represented by each symbol are Parts that meet this benchmark (but the symbol 11 of Figure 1 of the existing boiler indicates the inlet pipe).

In the description of the components such as the warm water boiler B of the present invention, the following directions are briefly set in conjunction with FIGS. 3 and 13 for convenience of explanation: It is assumed below that the constituent elements in accordance with the features of the present invention are applied to a boiler, particularly a small electric warm water boiler B of a warm water pad type.

One side of the pumping member P1 is set to the lower side in the direction of gravity, and one side of the motor M is set to the upper side.

However, the description of the warm water boiler including the direction reference does not limit the case where the features of the present invention are applicable to other technical fields, nor the scope of the patent application is limited to the case applicable to the boiler.

Please refer to FIG. 2, FIG. 3 and FIG. 4, respectively, showing a schematic top view, a main cross-sectional view and an exploded sectional view of the boiler of the present invention.

A pump P and a motor M that can drive the pump are built in the water tank W built in the boiler B casing B1.

The water tank W has a discharge port W1, which is suitable for the warm water discharged by the pump P, and a recovery port W2, which can be used for warm water after the return of the greenhouse, and the electric heater H can increase the water temperature; The detector St and the water level detector S1 can be applied to the on/off and hydration prompts of the heater and the pump.

The boiler B can be applied to various fields, but a warm water pad for a simple type of warm room is preferred, and thus Fig. 5 shows a schematic top view of a warm water pad using the boiler of the present invention.

The warm room gasket W4 is connected to the discharge port W1 and the recovery port W2, respectively.

The pump P and the motor M of the warm water boiler B of the present invention are built in the water tank W, so that a more compact boiler can be provided.

The upper part of the pump P is provided with a motor M, and the drive shaft M1 of the motor M is vertically installed. Therefore, as described above, the temperature of the water pumping critical water level can be lower than the following form, and it is easy to design a boiler suitable for its capacity: the outside of the sink The previous configuration of the pump is configured to align the previous configuration of the pumping member and the motor drive shaft horizontally within the sink.

Moreover, when particles such as calcareous components naturally contained in the water are dropped by the weight and hardened to form scale, noise does not occur due to solidification of the scale on the motor shaft and motor performance is lowered (resulting in pumping ( Pumping) performance issues).

The present invention takes the following measures in consideration of the compactness of the structure, the assembly, the convenience of repair, and the performance of the pump: the opening of the water inlet 11 of the pump P casing faces downward, The water outlet 13 is disposed on the side of the pumping member in response to the thrust of the pumping member (especially the impeller) P1. Referring to FIG. 4, in order to improve the mounting convenience of the motor M, the base Mb is introduced, and the base Mb can be The lower part of the motor casing is supported, and a through hole (not indicated) through which the drive shaft M1 is inserted and connected to the impeller P1 is also provided.

The susceptor Mb has nozzles applicable to the recovery port W2 and the discharge port W1, and the discharge port W1 is improved in assembly and watertightness by a male-female coupling with a nozzle (not indicated) on the right side of the pump casing 10.

The exhaust unit 15 of the warm water boiler B of the present invention can prevent problems such as a decrease in pumping ability, generation of noise, and generation of cavitation due to accumulation of air bubbles inside the water tank W.

In particular, the exhaust unit 15 is also mounted on the motor base Mb, so that productivity and assembly can also be improved.

The exhaust unit 15 includes an air discharge port 15a located at an upper portion of the water tank W, a storage chamber 15b disposed at a lower portion of the air discharge port and having an inflow port, and a float ball 15c built in the storage chamber.

The air discharge port 15a and the accommodating chamber 15b are formed on the shroud W3 which can be replenished with water. When the shroud W3 is coupled to the motor base Mb in a threaded manner, it is preferably built in the shroud W3. The float ball 15c of the accommodating chamber 15b is fixed by a bushing 15d at the lower portion of the shroud by means of a joint (threaded or interference fit).

The side surface of the bushing 15d forms a ventilation path (not shown), which not only satisfies the air permeability (or water permeability) but also prevents the floating ball 15c from coming off.

The float 15c of the exhaust unit 15 is normally located on the bushing 15d without closing the air discharge port 15a, thus helping to eliminate air bubbles in the water tank W. If it is applied to a warm water pad, when the small mobile electric boiler B is tilted due to movement or impact, the float ball 15c will float when the water is filled in the containing chamber 15b to close the air discharge port 15a, thereby preventing heat. Accidents such as burns caused by water leaking into the air discharge port.

The ball 15c uses a buoyant material (for example, a rubber material).

The symbol Wp not illustrated in Fig. 4 is a packing between the water tank W and the motor base Mb.

Please refer to the schematic main cross-sectional view of the diaphragm pump of the present invention, the concave sectional view, and the combined cross-sectional views of Figs. 6, 7, and 8.

When the diaphragm pump is applied to a warm water boiler, it can replace the existing impeller pump, but the relevant characteristics of the diaphragm pump can also be applied to other fields.

The diaphragm pump P having improved sealing performance of the present invention includes: a motor M having a drive shaft M1, a holder 21 connected to the drive shaft M1 and performing eccentric motion (a wobble motion), and a diaphragm 23 connecting the holders, A cap member 25 (generally three) disposed on the joint portion 23a of the diaphragm 23, and a bolt 27 for fastening and fixing the cap member and the retainer of the diaphragm.

The eccentric motion of the retainer 21 (i.e., the [retainer-membrane-cap assembly]) is actually caused by the cam M3 coupled to the drive shaft M1, as it is known in the art. It will not be detailed. This manual also does not describe the water inlet 11 and the water outlet 13 (the discharge port connected to the water tank W when applied to the boiler) The opening and closing process of the check valve (not indicated) of W1).

The diaphragm 23 is surrounded by the outer casing 10 and can separate the outer casing 10 from the motor M. On a part or all of the faces of the two sides of the diaphragm 23, a concave portion C1 or a convex portion C2 is formed, and the concave and convex portions C1 and C2 should be continuous. The annular closed circuit is formed, and the two faces are the fastening portions 21a of the retainer 21, the joint portion 23a of the diaphragm 23, and the joint faces of the cover member 25.

Referring to FIG. 7 and FIG. 8 , the recesses C1 are all formed on the diaphragm 23 , and the corresponding convex portions C2 are formed on the retainer 21 and the cover head 25 , but the relatively elastic diaphragm does not have a recess formed in advance but only in the retainer. When the convex portion is formed on the cover member 25, the pressure can be applied by the fastening of the bolt 27 and the concave portion corresponding to the convex portion can be naturally formed.

In any case, when the uneven portions are not overlapped, the sealing property can be improved.

The symbol Mc, which is not illustrated in Fig. 6, is a front and rear shield of the motor M, and will be described below with respect to the bearing housing 30 of the diaphragm pump applicable to the present invention.

9, FIG. 10, FIG. 11 and FIG. 12, FIG. 9 is a schematic top view of the bearing housing of the present invention, and FIG. 10 is a cross-sectional view thereof (cut along the line S1-S1 of FIG. 9), and FIG. A schematic top view of a bearing housing incorporating a bearing, and Fig. 12 is a schematic partial cross-sectional view of a motor to which the bearing housing is applied.

The bearing housing 30 can be applied to a motor for a pump P having an impeller (including a pump for a small warm water boiler), a diaphragm pump motor (a variety of models including the model shown in Fig. 6), or other articles using bearings.

The hollow inner circumferential surface of the bearing housing 30 is divided into a bearing contact portion and a bearing non-contact portion to be doubled (splined), and it is not necessary to perform precision reworking on the bearing contact portion or separately manufacture other parts, thereby improving productivity and reducing Production cost, no problem when demoulding after molding.

The various assumptions are applied to the motor M, so that the bearing housing 30 is disposed on the front and rear guards Mc of the motor (but the patent application range of the bearing housing of the present invention is not limited thereto).

Therefore, there are fastening holes 38 and wire holes 37 which can be fastened with the outer casing of the motor, which can be used for the carbon brush mounting portion 36, power supply and control work.

Referring to FIG. 9, FIG. 11 and FIG. 10, the bearing housing 30 of the present invention includes a plurality of (eight equally spaced) bearing B contact portions 31 and a plurality of (the equations are equally spaced 8 a bearing non-contact portion 32, the bearing non-contact portion being disposed between the contact portions and recessed therebetween to have a relatively large inner diameter.

The contact portion 31 can satisfy the roundness, the concentricity, and the straight angle, and can ensure the convenience of the mold disassembly of the non-contact portion 32 without requiring post-precision machining or adding parts, thereby improving productivity and unit price competitiveness.

To this end, the contact portion 31 is parallel to the axis, in particular as shown in the enlarged view of FIG. 10, parallel to the axis of the two-dot chain line and perpendicular to the rear side anti-disengagement portion 35 (in a perpendicular relationship with the axis), said non- The contact portions 32 are inclined and intersect at the axis (herein "intersection" means that the inner surface line of the non-contact portion and the axis extend to cross each other), and The side separation preventing portion 35 (which is perpendicular to the axis) forms an obtuse angle.

For the purpose of demolding convenience or the like, the connecting portion 33 connecting the contact portion 31 and the non-contact portion 32 preferably has an inclined structure forming an obtuse angle (especially, the inclination angle of the contact portion to the non-contact portion is an obtuse angle).

The circle formed when the plurality of contact portions 31 are connected along the radiation direction should correspond to the outer diameter of the bearing B.

The bearing housing can be applied not only to the motor shown in Fig. 12 but also to various other motors or articles.

Referring to Fig. 13 and Fig. 14, Fig. 13 and Fig. 14 are a schematic front cross-sectional view and a cross-sectional view showing a modification of the warm water boiler of the present invention, which is a modification of the structure shown in Figs. 2 to 5 .

In order to solve the problem caused by the bubble more satisfactorily, the warm water boiler of the present invention forms the air passage 40 on the motor M.

In particular, in order to avoid problems with the motor itself being immersed in water, the motor M stator Ms including the coil should take the following form under the structure in which the outer skin Cs ensures watertightness.

The pumping member, in particular, the air passage 40 is formed between the magnet and the outer skin Cs as the stator Mr constituting the combination of the impeller P1, that is, the air passage 40 is formed by a small gap between the stator Ms and the rotor Mr.

The two ends of the outer skin Cs surrounding the motor M stator Ms are disposed in the outer casing 10 of the pump P, The impeller P1 - magnet Mr coupling body is fixed to the shaft M1. The lower end of the shaft M1 is coupled to the shaft fixing portion 16 at the lower side of the pump casing 10, and the upper end thereof is coupled to the shaft fixing portion Cs1 at the center of the upper side of the motor stator Ms.

The inner peripheral surface of the [impeller P1-magnet Mr coupling body] has a bearing (especially Carbon Sleeve Bearing B) and is in contact with the shaft.

The air passage 40 is reconnected to the water tank W through the exhaust pipe 45, and the air passage 40 is connected to the nozzle (not indicated) at the center of the outer skin Cs coaxially with the drive shaft M1, and is connected to the exhaust pipe 45. It is then connected to the suction port 43 of the nozzle (not shown) on the side of the pump casing 10.

The arrangement of the air passages and the exhaust ports on the drive shaft contributes to a structure that allows the bubbles of conflicting flow on the portion of the impeller P1 to rise and fall quickly and accurately.

The exhaust port 41 connected to the nozzle of the exhaust pipe 45 has an upper narrow width and a lower width, which can further accelerate the bubble discharge speed.

The air inlet 43 connected to the nozzle of the exhaust pipe is narrower in width and lower, and is expanded and shattered after the air bubbles flow in, and passes through the air discharge port 15a of the exhaust unit 15 as explained above in connection with FIG. emission.

In order to eliminate air bubbles, a boiler having a ventilation path on the motor can prevent the pump from lowering the suction force and reduce the efficiency, the noise caused by the air bubbles, the vibration caused by the unstable flow caused by the air bubbles, and the air bubbles in the greenhouse pipe. The heating efficiency is reduced, the wear of the impeller support shaft is insufficient, and the friction is caused by friction and friction. Increased, heat causes noise and malfunction caused by the fusion of the bearing parts.

In the following, a schematic main cross-sectional view of another modified example of the warm water boiler of the present invention, which is carried out to further eliminate air bubbles, and FIG. 15 and FIG. 16 of the outer casing pattern ([A] is a side cross-sectional view, and [B] is a bottom view) The boiler structure of 15 is mostly similar to the boiler structure of Figure 13.)

The features shown in Figs. 15 and 16 are mainly formed around the water outlet 13 of the outer casing 10 of the pump P, particularly the recirculation hole 14 formed in the lower portion of the nozzle constituting the water outlet.

When the recirculation hole 14 is introduced, even if a vent hole (Air Vent) or a gas-water separator is not provided, a bubble sound does not occur (the pumping member breaks the bubble as a cause), so that it can be operated quietly.

Especially when the pipe is small like a warm water pad or the pipe length is large but the pipe length is long and the pipe resistance is large, the fluid pumped by the pumping member (especially the impeller) of the pump cannot flow 100% in the pipeline. Only the fluid whose pressure is greater than the resistance of the pipeline can be discharged and discharged to the greenhouse. Therefore, the fluid inside the pump flows due to the rotation of the impeller, but it cannot be spit out and can only flow inside the pump. When the temperature rises, the fluid will be dissolved. When the oxygen volume increases, the collision between the bubble and the impeller occurs, and not only noise but also cavitation can occur.

When the recirculation hole 14 is provided, the fluid that cannot be discharged due to the resistance of the pipeline will be discharged to the water tank through the recirculation hole and the pressure is lowered to some extent, so that the internal flow of the pump can be smoothed, and the effective discharge amount can be increased. And can smoothly enter Warm water recycling.

When the air bubbles are sufficiently eliminated by the recirculation holes, it is not necessary to separately form the vent holes at the exhaust unit 15 or the like as shown in Fig. 4, so that the air bubbles can be smoothly eliminated without considering the watertightness maintenance problem.

Referring to the perspective view and sectional view of the impeller assembly of the present invention, FIG. 17 ([A] combined perspective view and [B] exploded perspective view) and FIG. 18 ([A] impeller side bottom view, [B] combined cross-sectional view, and [C] sub-anatomical view).

In the drawings, the impeller assembly IA of the present invention, which is effectively improved in assembly, includes a pumping member P1 having an wing portion 51 and a fastening portion 53, an impeller body 50, a guide member G, and a magnet Mr.

The fastening portion 53 formed on the impeller body 50 and the corresponding fastening portion G1 of the guide member G can be screwed together, so that the existing bonding, ultrasonic fusion, embedded injection two-color injection, and embedded injection can be solved at one stroke. All the problems of the treatment method such as pressing the iron cylinder into the outer peripheral surface by using a press machine are not only easy to load and unload, but also can be applied to chemical, medical, food, etc. applications (especially with respect to the press method of the iron cylinder press) without using metallic parts. .

In the illustrated impeller P1 body 50, particularly the structure of the wing portion 51 is merely exemplary, and the contact portion 55 in contact with the magnet Mr can take various configurations.

When necessary (especially in order to avoid the scope of application of the present invention), the fastening portion 53 and the corresponding fastening portion G1 can be combined in a threaded manner by the following various modes: interference fit or easy combination (but not easy to separate) Structure (example: 锲 structure) Combination of bumps), bonding and ultrasonic fusion.

In order to enhance the ease of handling of the impeller assembly IA (because the phenomenon of mutual idling can be prevented), the joint between the guide member G and the magnet Mr should form a male-female joint portion that engages with each other.

In order to reduce the problem of breakage of the magnet Mr, the male joint portion Mr1 should be formed on the inner wall of the hollow portion constituting the magnet Mr (having a relatively large thickness relative to the female joint portion), A female bonding portion G2 is formed on the guide member G.

The rear end of the guide member G has a detachment prevention disk G3, and the disk is received at the rear end of the magnet, but the coupling structure can be variously changed.

The inner circumferential surface of the guide member G incorporates a carbon bearing B in order to improve the assembly type.

The foregoing does not describe the control of small-scale warm water boilers, pumps, and heaters, the eccentric motion of the diaphragm pump, the suction and discharge operation, and the known techniques related to the material of each component, but those skilled in the art can easily perform the same. It is realized after speculation and inference.

The technical features of the components of the boiler, the motor, the pump, the bearing housing and the impeller assembly having the specific shape and structure of the present invention are specifically described in the foregoing with reference to the drawings, and those skilled in the art can leave without departing from the invention. The present invention is subject to various modifications, adaptations and substitutions, which are intended to be included within the scope of the following claims.

B‧‧‧Boiler

B1‧‧‧Chassis

H‧‧‧heater

S1‧‧‧ water level detector

St‧‧° Temperature Detector

W‧‧‧Sink

S1‧‧‧ spitting

W2‧‧Recovery

W3‧‧‧Shield

W4‧‧‧Conditional piping

P‧‧‧ pump

P1‧‧‧ pumping components

10‧‧‧ Shell

11‧‧‧ water inlet

13‧‧‧Water outlet

14‧‧‧Recycling holes

15‧‧‧Exhaust unit

16‧‧‧Axis fixed part

M‧‧ motor

M1‧‧‧ drive shaft

Mc‧‧‧Shield

B‧‧‧ bearing

21‧‧‧retainer

23‧‧‧ diaphragm

25‧‧‧Headpieces

27‧‧‧ bolt

Ms‧‧‧ Jing Zi

Mr‧‧‧Rotor (magnet)

30‧‧‧ bearing housing

31‧‧‧Contacts

32‧‧‧ Non-contact department

33‧‧‧Connecting Department

34‧‧‧ Input Department

35‧‧‧Anti-disengagement department

36‧‧‧Carbon Assembly Department

37‧‧‧Wire hole

38‧‧‧ fastening holes

40‧‧‧ Ventilation Road

41‧‧‧Exhaust port

43‧‧‧ suction port

45‧‧‧Exhaust pipe

IA‧‧‧impeller assembly

50‧‧‧The impeller body

51‧‧‧ wing

53‧‧‧ fastening department

55‧‧‧Contacts

G‧‧‧Guide

G1‧‧‧Corresponding fastening department

G2‧‧‧Female Joint

G3‧‧‧

Mr1‧‧‧Combination Department

1 is a schematic front cross-sectional view of a conventional small electric boiler; FIG. 2, FIG. 3 and FIG. 4 are respectively a schematic top view, a main cross-sectional view and an exploded sectional view of the boiler of the present invention; FIG. 5 is a schematic top view of a warm water pad to which the boiler of the present invention is applied. Figure 6 is a schematic front cross-sectional view of the diaphragm pump of the present invention; Figures 7 and 8 are schematic cross-sectional views and a combined cross-sectional view of the diaphragm of the recess shown in Figure 6; Figures 9 and 10 are applicable to the motor. A schematic top view and a cross-sectional view of the bearing housing of the present invention (taken along the line S1-S1 shown in FIG. 9); FIG. 11 is a schematic top view of the bearing housing incorporating the bearing; FIG. 12 is a bearing housing to which the present invention is applied. FIG. 13 and FIG. 14 are a schematic front cross-sectional view and a cross-sectional view showing a modification of the warm water boiler of the present invention; and FIGS. 15 and 16 are schematic main cross-sectional views showing another modification of the warm water boiler of the present invention; FIG. 17 and FIG. 18 are perspective and cross-sectional views of the impeller assembly of the present invention.

Mr‧‧‧Rotor (magnet)

50‧‧‧The impeller body

51‧‧‧ wing

55‧‧‧Contacts

G‧‧‧Guide

G1‧‧‧Corresponding fastening department

G2‧‧‧Female Joint

Mr1‧‧‧Combination Department

Claims (4)

A warm water boiler having a convenient assembly of an impeller assembly, comprising a water tank having a discharge port and a recovery port; a pump built in the water tank, comprising a casing, and a pumping member built in the casing The outer casing has a water inlet, a water outlet connected to the discharge port, and a recirculation hole formed around the water outlet; and a motor having a drive shaft connected to the pumping member, Arranging an air passage disposed between the stator and the rotor of the motor, an exhaust pipe connecting the air passage to the water tank, and a magnet; wherein the pumping member of the pump is an impeller, the impeller The magnet of the motor, and the magnet and the guide of one of the impellers may constitute an impeller assembly, the impeller having a wing portion and a fastening portion, the guide member having a corresponding joint with the fastening portion of the impeller The fastening portion, the magnet is sleeved on the outer peripheral surface of the guide member, and the joint surface of the guide member and the magnet respectively has at least one male joint portion and a female joint portion that are engaged with each other. A warm water boiler having an easily assembled impeller assembly according to claim 1, wherein a drive shaft of the motor is supported by a bearing, the bearing being coupled to a bearing housing, the bearing housing comprising: a plurality of bearing contacts And a plurality of bearing non-contact portions disposed between the contact portions and recessed therebetween. A warm water boiler having an impeller assembly that is easy to assemble, as described in claim 1, wherein the drive shaft of the motor is vertically mounted. A warm water boiler having an impeller assembly that is easy to assemble, as described in claim 1, wherein a recirculation hole is formed around the water outlet of the pump casing.