KR20100029733A - High efficient boiler - Google Patents

Abstract

PURPOSE: A high efficient boiler is provided to prevent the deterioration of heating and prevent heat generated due to lack of lubrication at an impeller bearing shaft. CONSTITUTION: A high efficient boiler includes a water tub(W), a pump(P), and a motor(M). The water tub has a discharge outlet and a recovery port(W2). The pump comprises a housing(10) and a pumping member(P1). The housing has an inlet port(11) and an outlet port. A recirculation hole is formed in around the outlet port of the pump housing. The driving shaft of the motor is perpendicularly installed. The inlet port of the housing of the pump is downward opened. The outlet port is formed in the side of the pumping member.

Description

Hot water boiler which solved problem caused by bubble {HIGH EFFICIENT BOILER}

The present invention relates to a hot water boiler to smoothly circulate bubbles.

In more detail, a recirculation hole is formed around the outlet of the pump housing so that the air introduced into the pump housing flows smoothly into the heating conduit with the fluid flow, and some of the air is circulated through the recirculation hole. The present invention relates to a hot water boiler which has no cavitation problems due to noise, deterioration of pump performance, and accumulation of bubbles when circulating hot water with increased pressure including bubbles.

As schematically shown in FIG. 1, a water tank W is arranged in a case B1 of a conventional small hot water boiler 10, which may be applied to a hot water boiler, in particular, a domestic hot water mat, and the water in the water tank W may be a heater ( It is heated by H) and circulated through the pipe connected to the discharge port W1 by the pump P.

As the hot water of the boiler rises from room temperature to high temperature, the volume of dissolved oxygen contained in the hot water increases and bubbles up.

If the inevitable bubbles are not circulated smoothly, the pumping member, especially the impeller, collides with the pump during operation of the bubble, causing bubbles to be generated.

* In addition, if bubbles accumulate, cavitation may occur.

In addition, if the heating pipe is long and the diameter is small, such as hot water mat, the pipe resistance is increased, so that smooth hot water circulation can be prevented, so that bubbles are also difficult to be smoothed.

Therefore, in the case of a small electric boiler, eliminating bubble circulation is an important factor in determining product quality.

Furthermore, the pump is an external type provided outside the tank,

Even if it is provided inside the tank, it is arranged near the bottom, and furthermore, if the motor is arranged horizontally

If the water level is not enough to lock the pumping member (higher limit level than when vertically arranged) that is located horizontally, it causes the noise due to idling, the noise can only disturb the sound sleep.

In addition, in the case of an external pump or the like, particles of calcareous components, which are naturally contained in water, fall down due to their own weight and become solid to form a scale.

These scales, especially if stuck to the motor shaft, cause noise and motor performance problems.

Problems due to scale are particularly problematic when the form is always filled and used.

In addition, in the case of the conventional external pump is loaded by the water pressure due to the water of the tank constantly filled,

Since the water pressure fluctuates depending on the water level, the load due to the water pressure on the motor is not always constant, which causes faster motor aging.

Therefore, the present invention is a decrease in efficiency due to the suction power of the pump (the amount of hot water discharge is forced to decrease if the amount of bubbles increases), noise caused by bubbles, vibration caused by unstable flow of bubbles, heating due to bubbles in the heating pipe It is proposed to prevent problems such as deterioration of efficiency, heat generated by lack of lubrication of the impeller support shaft, increased wear amount due to frictional force, and the bearing part being fused due to heat generation.

In the present invention, a recirculation hole is formed around the outlet of the pump housing to facilitate smooth circulation of the bubbles, and the released bubbles are circulated into the water tank again so that the bubbles can be more smoothly resolved without the problem of maintaining watertightness. The purpose is to provide.

Hot water boiler to solve the problems caused by the bubble according to the present invention to achieve the above object

A pump including a housing having an inlet and an outlet connected to the outlet, and a pumping member embedded in the housing; And

A motor having a drive shaft connected to the pumping member;

Including but not limited to,

Recirculation holes are formed around the outlet of the pump housing.

In addition, the hot water boiler to solve the problem caused by the bubble according to the present invention

The motor is provided above the pump, the drive shaft of the motor is installed vertically,

It is more preferable that the motor is provided with an air passage, and further connected to the water tank through the exhaust pipe through the air passage.

As described above, the hot water boiler which solves the problem caused by the air bubble according to the present invention has a recirculation hole formed around the outlet of the pump housing, resulting in a decrease in efficiency due to a decrease in suction power of the pump, noise caused by bubbles, and unstable flow due to bubbles. It is possible to prevent problems such as vibration, deterioration in heating efficiency due to air bubbles in the heating pipe, heat generated by insufficient lubrication of the impeller support shaft, increased wear amount due to frictional force, and the bearing part being fused due to heat generation. have.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In each of the drawings, the same reference numerals, in particular, the tens and ones digits, or the same digits, tens, ones, and alphabets refer to members having the same function, and unless otherwise specified, each reference in the drawings. The member referred to may be regarded as a member conforming to this criterion (this is also the case in FIG. 1 related to a conventional boiler, except that reference numeral 11 denotes an inlet pipe in FIG. 1).

1, 2, 3, 5, and 15 in the reference numeral 'B' refers to the boiler,

For convenience, 'B' in FIGS. 6, 11, 12, 14, and 18 represents a bearing.

When explaining the hot water boiler (B) and the like according to the present invention for the sake of convenience, the approximate direction of the rigidity is specified with reference to FIGS. 3 and 13.

Assuming that the components corresponding to each feature of the present invention are applied to a boiler, in particular, a small electrothermal hot water boiler (B) for a hot water mat, etc.

Determine the side with the pumping member (P1) to the lower side and the side with the motor (M) to the upper side according to the direction of gravity.

However, due to the limited description related to the hot water boiler, including the directional reference, it should not be excluded that each feature of the present invention is applied to other technical fields, and furthermore, the scope of protection should not be limited to the case where the boiler is limited to the boiler. .

As can be seen in Figures 2, 3 and 4, respectively, schematic plan, front and exploded cross-sectional views of the boiler according to the present invention,

The pump P and the motor M for driving the pump are built in the water tank W built in the case B1 of the boiler B.

In addition, the water tank (W) is formed with a discharge port (W1) for hot water discharged by the pump (P) and a recovery port (W2) for hot water to be circulated back after being utilized for heating,

Electric heater (H) for heating the water, and a temperature sensor (St) and a water level sensor (Sl) for heating and pump on / off and water replenishment notification, and the like is provided.

Such a boiler (B) may be used in various fields, but in consideration of the case of being utilized in the hot water mat for simple heating, Figure 5 shows a schematic plan view of the hot water mat using the boiler according to the present invention. .

The heating pipe W4 of the hot water mat is connected to the discharge port W1 and the recovery port W2, respectively.

The hot water boiler B according to the present invention may provide a more compact boiler because the pump P and the motor M are built in the water tank W.

In addition, since the motor (M) is provided in the upper portion of the pump (P), the drive shaft (M1) of the motor (M) is vertically installed, as mentioned above,

Compared to the conventional pump type provided outside the tank or the pumping member and the motor drive shaft in the tank horizontally arranged lower limit of the hot water pumping level, easy boiler design for capacity,

In addition, when particles such as calcareous components naturally contained in water fall due to their own weight and harden to form scale, there is no problem of noise generation and motor performance deterioration due to fixing of the motor shaft of the scale (and eventually deterioration of pumping performance). .

Furthermore, in the present invention, the inlet port 11 of the housing of the pump P is opened downward in consideration of the more compact structure, assemblability, serviceability, pump performance, etc., and the outlet port 13 is a pumping member (especially an impeller). It is provided on the side of the pumping member to suit the thrust of (P1),

As can be seen in Figure 4, also for the convenience of the installation of the motor (M) base for supporting the lower part of the motor housing and having a through hole (not shown) through which the drive shaft (M1) can be connected to the impeller (P1) ( Mb) was introduced.

In addition, the base (Mb) has a nozzle for the recovery port (W2) and the discharge port (W1), in particular the discharge port (W1) in the form of male and female coupling with the nozzle (not shown) on the right side of the pump housing 10 The assembly and watertightness were improved.

On the other hand, the hot water boiler (B) according to the present invention introduced the exhaust unit 15 in order to prevent the pumping force degradation, noise transport, cavitation generation problems caused by the cumulative bubble generation in the water tank (W).

In particular, the exhaust unit 15 is also provided in the form provided in the motor base (Mb) in consideration of the improvement in productivity and assembly.

The exhaust unit 15 includes an air outlet 15a formed at an upper portion of the water tank W, a storage chamber 15b arranged at a lower portion of the air outlet, and having an inlet formed therein, and a floating ball 15c embedded in the storage chamber. Is done.

The air outlet (15a) and the storage chamber (15b) is provided in the cover (W3), in particular for replenishing water,

The floating ball 15c embedded in the storage chamber 15b of the cover W3, which is preferably screwed to the motor base Mb, is coupled to the lower portion of the cover (such as screwing or interference fitting). It is fixed by the bushing 15d.

The bushing 15d is preferably provided with a cut vent channel (not shown) at the side to satisfy the breathability (or water permeability) while preventing the ball 15c from being separated.

The exhaust unit 15 is usually used to help eliminate bubbles in the water tank (W) because the ball (15c) stays on the bushing (15d) and does not block the air outlet (15a),

When used for hot water mats, when the small and portable electric boiler B is inclined by movement or impact, when water fills the storage chamber 15b, the ball 15c floats to close the air outlet 15a. Therefore, it is possible to prevent hot water from leaking into the air outlet and causing an accident such as a burn.

The ball 15c should be a material having a buoyancy (eg, a rubber material).

In FIG. 4, reference numeral Wp denotes a packing interposed between the water tank W and the motor base Mb.

Next, look at Figures 6, 7 and 8, which is a schematic front cross-sectional view, a main part exploded cross-sectional view and a coupling cross section for the diaphragm pump according to the present invention.

When the diaphragm pump is introduced into the hot water boiler, the existing impeller type pump may be replaced, but the characteristics related to the diaphragm pump may be sufficiently applied to other fields.

The diaphragm pump P having improved sealing property according to the present invention is connected to a motor M including a drive shaft M1, a retainer 21 connected to the drive shaft M1, and having an eccentric motion (a kind of wobble motion), and a retainer. A diaphragm 23, a head member 25 (usually three) arranged at the engaging portion 23a of the diaphragm 23, and a bolt 27 for fastening the head member and the diaphragm to the retainer. Is done.

The eccentric motion of the retainer 21 (in the end [retainer-diaphragm-head member combination]) is substantially due to the interposition of the cam M3 coupled with the drive shaft M1, and thus corresponds to known techniques. Is omitted.

In addition, the description of the opening and closing process of the check valve (not shown) with respect to the inlet port 11 and the outlet port 13 (when applied to the boiler will be connected to the outlet port W1 of the water tank W).

Both sides of the diaphragm 23, which are surrounded by the housing 10 and serve to separate from the motor M, that is, the fastening portion 21a of the retainer 21, the engaging portion 23a of the diaphragm 23, and Some or all of the contact surfaces of the head member 25 are provided with recessed portions C1 or convex portions C2 which are engaged with each other, and the uneven portions C1 and C2 are continuous. It is desirable to form an annular closed loop.

As can be seen in FIGS. 7 and 8, the recesses C1 are all formed in the diaphragm 23, and the corresponding convex portions C2 are formed in the retainer 21 and the head member 25.

Relatively elastic diaphragm is formed in the recess is formed in the recessed portion 21 and the head member 25 without forming the concave portion in advance, but the concave portion corresponding to the convex portion naturally formed by pressing the bolt 27 Can be.

In any case, it is preferable that the uneven portions are not overlapped for the purpose of improving the sealing property.

Unexplained reference numeral Mc in FIG. 6 corresponds to the front and rear covers of the motor M, and will be described later with reference to the bearing container 30 applicable to the diaphragm pump of the present invention.

Fig. 9, which is a schematic plan view of the bearing container according to the present invention, Fig. 10, which is a cross-sectional view (cut along the line S1-S1 of Fig. 9), Fig. 11, a bearing plan view of the bearing with the bearing coupled It will be described with reference to Figure 12 which is a schematic partial cross-sectional view of the motor to which the applied.

Such a bearing container 30 may be applied to a pump P motor (including a pump for a small hot water boiler), a diaphragm pump motor (including various models including the model of FIG. 6) having an impeller, and other bearing introduction articles.

The bearing container 30 is doubled (splined) to the bearing contact part and the bearing non-contact part on the hollow inner circumferential surface of the bearing container so as to eliminate the need for further remanufacturing or other parts of the bearing contact part, thereby increasing productivity and increasing the manufacturing cost. In order to lower, there is no problem in separating from the mold after molding.

Each drawing considers that the bearing container 30 is formed on the front and rear cover Mc in consideration of the case that is basically applied to the motor (M), however, the protection range of the bearing container according to the present invention is limited. Should not be interpreted as

Therefore, the fastening hole 38 for fastening with the motor outer cylinder housing, the carbon brush assembly 36, and the wire hole 37 for power supply and control are formed.

As shown exaggerated in the enlarged circle of Figs. 9, 11 and 10, the bearing container 30 according to the present invention comprises a plurality of bearing (B) contact portions 31 (eight equally spaced in the drawing), There are a plurality of bearing non-contacting portions 32 (8 equally spaced in the figure) arranged and recessed between the contacts and having a relatively larger inner diameter.

The contact portion 31 is for satisfying the roundness, concentricity and squareness,

The non-contact part 32 is to ensure the ease of separation of the mold to ensure productivity and cost competitiveness without the need for post-precision processing or additional parts.

For this purpose the contact 31 is parallel to the axis, in particular exaggerated in the enlarged circle of FIG. 10, parallel to the axis of the dashed line and at right angles to the rear break prevention portion 35 (vertical). Made up,

The non-contact portion 32 is inclined in the form of the axis and the contact (the term 'occlusal' extends the inner surface of the non-contact portion, and assuming that when the axis extends to meet each other), and also the rear departure prevention portion It becomes obtuse with (35) (vertical).

In addition, the connection part 33 connecting the contact part 31 and the non-contact part 32 is an obtuse tapered structure having an obtuse angle (especially, the angle of inclination of the contact part inclined toward the non-contact part is an obtuse angle in view of ease of mold separation and the like). It is preferable to have).

In addition, it is preferable that the circle formed when connecting the contact portions 31 in the radial direction corresponds to the outer diameter of the bearing (B).

Such bearing receptors can be applied to the motors shown schematically in FIG. 12 as well as to a variety of other motors or articles.

Next, a schematic front and exploded cross-sectional view of a modified example of the hot water boiler according to the present invention, which is modified compared to the structure shown in FIGS. 2 to 5, will be described with reference to FIGS. 13 and 14.

In order to more completely solve the problems caused by bubbles, the hot water boiler according to the present invention formed a vent 40 in the motor (M).

In particular, the motor (M) stator (Ms) including the coil, etc. so that there is no problem due to the inundation of the motor itself in the structure that the water tightness is guaranteed by the outer shell (Cs),

The magnet, which is the stator (Ms) that forms the union of the pumping member, especially the impeller (P1), forms a vent 40 between the shell Cs, that is, between the stator (Ms) and the rotor (Mr). The minute gap is in the form of aeration (40).

In addition, both ends of the outer shell Cs surrounding the stator Ms of the motor M are seated and supported by the pump P housing 10,

[Impeller (P1)-Magnet (Mr) Combination] is fixed to the shaft (M1),

The shaft M1 has a structure in which a lower end is coupled to the lower middle shaft fixing part 16 of the pump housing 10, and an upper end is coupled to the upper central fixing part Cs1 of the motor stator Ms.

[Impeller P1-Magnet (Mr) Assembly] A bearing, in particular, a carbon sleeve bearing B, is provided on the inner circumferential surface to make contact with the shaft.

The aeration passage 40 is connected to the tank (W) again through the exhaust pipe 45,

In particular, the aeration passage 40 is connected by a nozzle (not specified) provided at the center of the outer shell Cs so as to be coaxially arranged with the driving shaft M1, and connected to the exhaust pipe 45, and then to one side of the pump housing 10. To an intake port 43 on a nozzle (not shown).

The drive axial arrangement of the aeration and exhaust vents is intended to achieve a structure in which bubbles impinging the flow at the impeller P1 can be lifted and discharged most quickly and accurately.

Exhaust port 41 on the nozzle connected to the exhaust pipe 45 helps the release of bubbles faster in the shape of the upper and lower light,

In addition, the inlet port 43 on the nozzle connected to the exhaust pipe is expanded and destroyed as the bubble enters the upper and lower straits, and is easily discharged through the air outlet 15a of the exhaust unit 15 described above with reference to FIG. 4.

In order to eliminate such bubbles, the boiler is provided with a ventilation path to reduce the efficiency caused by the suction power of the upper pump, noise caused by bubbles, vibration caused by unstable flow of bubbles, and heating efficiency due to bubbles in the heating pipe. Deterioration, heat generated due to lack of lubrication of the impeller support shaft, increase in the amount of wear due to friction force, the bearing portion is fused due to the heat generation can be prevented problems such as noise and failure.

15 and 16 ([A] is a side cross-sectional view, [B] is a bottom view of a schematic sectional view and a housing related view of another modified example of the hot water boiler according to the present invention to further eliminate bubbles). (Boiler structure of FIG. 15 is mostly similar to that of FIG. 13).

In particular, the features shown in FIGS. 15 and 16 are in the recirculation hole 14 formed around the outlet port 13 of the pump P housing 10, in particular under the nozzle forming the outlet port.

When the recirculation hole 14 is introduced, since a bubble sound (caused by bubble destruction due to the pumping member) does not occur even without a separate air vent or a separator, it has been shown that a quiet operation is possible.

In particular, if the pipe diameter is small or large, but the pipe length is large, such as a hot water mat, if the pipe resistance is large, the fluid discharged by the rotation of the pumping member, especially the impeller, cannot flow into the 100% pipeline and is pressurized larger than the pipeline resistance. As only the fluid under pressure is discharged and discharged into the heating pipe, the fluid inside the pump flows due to the rotation of the impeller, but it cannot circulate but circulates inside the pump, and dissolved in the fluid as the temperature rises. As the volume of oxygen increases and the volume increases, the bubbles collide with the impeller, producing noise and even cavitation.

However, due to the formation of the recirculation hole 14, the fluid not discharged due to the pipeline resistance is discharged to the water tank through the recirculation hole, thereby relieving the pressure to some extent, so that the flow in the pump is smooth and the effective discharge amount is increased, allowing for smooth hot water recycling. Done.

If only the recirculation hole is sufficient to eliminate bubbles, air vents such as the exhaust unit 15 as shown in FIG. 4 may be unnecessary, and thus it is expected that the bubbles can be smoothly eliminated without problems of maintaining watertightness.

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

In the drawing, the assembly of the impeller assembly IA improved according to the present invention includes a pumping member P1 having a wing portion 51 and a fastening portion 53, in particular an impeller body 50, a guide G, and a magnet. (Mr).

In particular, since the fastening portion 53 formed on the impeller body 50 and the corresponding fastening portion G1 of the guide G are screwed together, the existing adhesive, ultrasonic fusion, insert injection double injection, and insert injection are pressed into the outer circumferential surface. Can solve all the problems of press-fitting the barrel,

It is easy to assemble and disassemble and has no merit (particularly in comparison with the press press injection method), so that it is suitable for use in chemical, medical, food, and the like.

In the illustrated impeller (P1) body 50 in particular the structure of the wing 51 is exemplary, the structure of the contact portion 55 in contact with the magnet (Mr) may also be variously modified.

In addition, if necessary (particularly to avoid the protection scope of the present invention), the coupling method of the fastening part 53 and the counterpart fastening part G1 has a structure that is easy to fit or difficult to connect (difficult to separate) instead of screw fastening method. May be modified in a manner of bonding (eg, introducing a wedge into the wedge structure), bonding, or ultrasonic welding.

Furthermore, it is preferable that male and female coupling parts are formed at the contact surfaces of the guide G and the magnet Mr in order to easily assemble and disassemble the impeller assembly IA (since mutual idling is prevented).

In particular, in order to reduce the problem of breakage of the magnet (Mr), the inner wall forming the hollow of the magnet (Mr) is formed with a male coupling portion (Mr1) (the thickness is thicker than the case of the female coupling portion, there is no problem in strength), It is preferable that the arm coupling part G2 is formed in the guide G.

In addition, the rear end of the guide (G) is formed a departure prevention disk (G3), the disk is a structure that is accommodated in the rear end of the magnet, this coupling structure can be variously modified.

In addition, the carbon bearing (B) is coupled to the inner circumferential surface of the guide (G) to improve the assembly properties.

In the above description, a conventional hot water boiler, a control of a pump and a heater, an eccentric motion of a diaphragm pump, suction and discharge operations, materials of each component, and the like are omitted. However, those skilled in the art can easily infer and infer this. I can reproduce it.

In the above description of the present invention, a boiler, a motor, a pump, a bearing container, an impeller assembly, etc. having a specific shape and structure have been described with reference to the accompanying drawings. However, various modifications, changes, and substitutions may be made by those skilled in the art. If possible, such modifications, changes and substitutions should be interpreted as falling within the protection scope of the present invention.

1 is a schematic front sectional view of a conventional small electric boiler.

2, 3 and 4 are schematic plan, front and exploded cross-sectional views, respectively, of a boiler according to the present invention.

5 is a schematic plan view of a hot water mat using a boiler according to the present invention.

6 is a schematic front sectional view of a diaphragm pump in accordance with the present invention.

7 and 8 is a schematic exploded cross-sectional view and a coupling cross-sectional view of the diaphragm and the like corresponding to the main portion of FIG.

9 and 10 are schematic plan and cross-sectional views (cut along the line S1-S1 of FIG. 9) of a bearing container according to the invention, which can be applied to a motor.

Figure 11 is a schematic plan view of the receptor coupled bearing.

12 is a schematic partial cross-sectional view of a motor to which a bearing container according to the present invention is applied.

13 and 14 is a schematic front and exploded cross-sectional view of a modification of the hot water boiler according to the present invention.

15 and 16 is a schematic front sectional view and a housing related view of another variant of the hot water boiler according to the present invention.

17 and 18 are a perspective view and a cross-sectional view of the impeller assembly according to the present invention.

<Description of the symbols for the main parts of the drawings>

B: Boiler B1: Case

H: Heater Sl: Water Level Sensor

St: Temperature sensor W: Bath

S1: discharge port W2: recovery port

W3: Cap W4: Heating Piping

P: Pump P1: Pumping Member

10: housing 11: inlet

13: outlet 14: recirculation ball

15: exhaust unit 16: storage

M: motor M1: drive shaft

Mc: Cover B: Bearing

21: Retainer 23: Diaphragm

25: head member 27: bolt

Ms: stator Mr: rotor (magnet)

30: bearing receptor 31: contact portion

32: non-contact portion 33: connection portion

34: input part 35: release prevention part

36: brush assembly 37: wire hole

38: fastener 40: by aeration

41: exhaust port 43: intake port

45: exhaust pipe IA: impeller assembly

50: impeller body 51: wing

53: fastening portion 55: contact portion

G: Guide G1: Counterpart

G2: female coupling part G3: disk

Mr1: Male coupling part

Claims (1)

A water tank formed with a discharge port and a recovery port; A pump including a housing having an inlet and an outlet connected to the outlet, and a pumping member embedded in the housing; And A motor having a drive shaft connected to the pumping member; Including but not limited to, A recirculation hole is formed around the outlet of the pump housing, The motor is provided above the pump, The drive shaft of the motor is installed vertically, The inlet of the housing of the pump is open downward, the hot water boiler to solve the problem caused by bubbles, characterized in that provided on the side of the pumping member.

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