WO2001073359A1

WO2001073359A1 - Hot-water furnace

Info

Publication number: WO2001073359A1
Application number: PCT/CN2000/000291
Authority: WO
Inventors: Mengqiu Yan
Original assignee: Mengqiu Yan
Priority date: 2000-03-24
Filing date: 2000-09-26
Publication date: 2001-10-04
Also published as: AU2000275039A1

Abstract

The present invention relates to a warm-water furnace, comprising a base, a heat exchanger and a hot-air fan which are above the base. There provides a warm-water room and a brazier in the bottom of the base. There's a central heat-exchanging chmaber above the warm-water room. The heat exchanger comprises a barrel. There provides a prinkler in the upper portion of the barrel. There are several swirlers below the spinkler. The hot-air fan comprises a burner fixed on the base and an air compressor above the burner. There provides a fuel spinkler, flame-barrel-bottom-plate, taper sleeve, severeal stelps of inverted cone-shaped flame barrels interlinked together and localizaters within the burner in turns from upper portion to low portion thereof. The air compressorcomprises at least a two-stage compression pump which comprises a blade driven by motor and a guide blade. The furnace of the present invention can be used for heating water for heating, washing and industrial uses.

Description

boiler

Technical field

The invention relates to a continuous flow heating water heater. Background technique

At present, the conventionally known thermal water heaters perform heat exchange by heat conduction through a heat transfer surface such as a pot or a pipe. The heat transfer efficiency of this traditional hot water method, the speed of the hot water speed depends on the size of the heat transfer area, the thermal conductivity of the heat transfer material, the temperature difference between the heat transfer surface inside and outside, the heat transfer surface inside and outside, Factors such as the speed of water flow. In order to obtain higher thermal efficiency, people have worked hard to increase the heat transfer area in the design, forcibly increase the flow velocity of water and fire, use precious metals with good thermal conductivity, and increase the furnace temperature and exhaust temperature. As a result, Increasingly cumbersome, complex, and expensive. But the thermal efficiency is still not high. Summary of the Invention

The purpose of the present invention is to overcome the shortcomings of the prior art, and provide a hot water furnace with simple structure, small size, light weight, low price and high thermal efficiency.

The hot water furnace of the present invention includes a base, a heat exchanger and a hot air fan mounted on the base. The side wall and the upper wall of the base are a sandwich structure composed of an inner wall and an outer wall. The sandwich structure is provided with a water inlet pipe and an outlet. A water pipe, the bottom of the inner cavity of the base is a hot water storage chamber and a fire bowl, the upper part of the inner cavity water storage chamber is a central heat exchange chamber, and a water overflow line is provided on the water level line of the water storage chamber; The heat exchanger includes a heat exchanger barrel, an exhaust pipe is provided on the top of the heat exchanger, a water sprayer is arranged on the inner cavity of the heat exchanger barrel, and a plurality of screwdrivers are arranged below the water sprayer. The heat exchanger is connected with the central heat exchange chamber below the inner cavity of the heat exchanger barrel; the heat blower is composed of a burner installed above the base and air arranged coaxially therewith on the burner. Compressor composition, the burner is provided with a heat insulation layer on the peripheral wall, and the inner cavity of the burner is sequentially equipped with a fuel injector, a flame tube bottom plate, a cone sleeve, and a plurality of stages in an inverted cone-shaped nest arrangement Flame tube, positioning sleeve, the positioning sleeve A lower opening is aligned with the fire bowl and communicates with the central heat exchange chamber; the air compressor includes a cylinder, an upper cover of the cylinder is provided with an air inlet, and a soundproof cover is installed at the top of the cylinder In the lower cylinder of the soundproof cover, at least two compressors composed of a motor-driven impeller and a guide vane are provided; the outlet pipe of the sandwich structure is connected to the return pipe of the water sprayer through a water pump.

According to the hot water furnace of the present invention, at least one secondary cyclone is provided on the water jet of the heat exchanger, and a secondary water jet is provided on the secondary cyclone, and the secondary water jet The water inlet of the device is connected to the water pipe.

The water heater of the present invention, wherein the water sprayer includes a casing and a plurality of nozzles placed in the casing, a tap water inlet is provided on an outer side wall of the casing, and tap water and reflux water are disposed in the casing. A split ring is provided with a return water filter in the sprinkler housing.

The hot water furnace of the present invention, wherein the cyclone is composed of a cyclone outer ring, a cyclone fixing plate, and a plurality of blades fixed therebetween at an angle of 30 to 60 ° from a horizontal plane.

In the hot water furnace of the present invention, the number of cyclones is 2-8.

In the hot water furnace of the present invention, the lowermost one of the cyclones is supported on the base by a plurality of cyclone supporting feet.

The hot water furnace of the present invention, wherein the bottom plate of the flame tube, the cone sleeve, the flame tube, and the positioning sleeve of the burner are provided with a radial gap or an axial gap with each other, There are several ventilation holes on the wall. In the hot water boiler of the present invention, the side wall of the cone sleeve of the burner is provided with a plurality of inlet channels with a width of 1 to 5 mm that are tangent to the inner wall of the cone sleeve.

In the hot water boiler according to the present invention, there are two impellers of the air compressor, and the impellers are respectively arranged at two ends of the motor, and an air sealing plate is provided on the outer side of the first-stage impeller located at the upper end of the motor.

In the hot water furnace of the present invention, the lower side wall of the nozzle body of the nozzle of the water sprayer is provided with 1 to 4 tangential grooves along the tangential direction.

In the hot water boiler according to the present invention, the fuel injector of the burner is a fuel and gas injector.

The hot water furnace of the present invention, wherein the impeller of the air compressor includes a long blade, a middle blade and a short blade.

The hot water boiler of the invention changes the traditional thermal water heating device to perform heat exchange by heat conduction, and eliminates the equipment such as pots and pipes of known thermal water heating devices, so that hot air is directly compatible with water for heat exchange. It has the advantages of simple structure, light weight, small size, low price and high thermal efficiency. It has been confirmed by tests that its thermal efficiency can reach more than 92%, and its volume, weight and price are 20% to 50% lower than hot water boilers of the same specification. Brief description of the drawings

Figure 1 is a schematic structural diagram of a first embodiment of the hot water boiler of the present invention;

2 is a schematic structural diagram of a second embodiment of the hot water boiler according to the present invention;

3 is a front view of a cyclone in a heat exchanger of a hot water boiler according to the present invention;

4 is a cross-sectional view taken along the line A--A of FIG. 3;

5 is a cross-sectional view taken along line B-B in FIG. 4;

6 is a schematic structural diagram of a nozzle of a heat exchanger of a hot water boiler according to the present invention;

7 is a cross-sectional view taken along the line C-C of FIG. 6;

FIG. 8 is an arrangement diagram of grooves on a cone sleeve of a hot-air heater burner of the present invention;

FIG. 9 is a partial cross-sectional view taken along line D-D in FIG. 8;

FIG. 10 is a schematic structural diagram of a fuel injector of a hot-air heater burner of the present invention;

FIG. 11 is a cross-sectional view taken along line E--E of FIG. 10;

FIG. 12 is a schematic structural diagram of an impeller of a hot-air heater air compressor of the present invention. -Embodiment of the invention

The preferred embodiment of the hot water boiler of the present invention will be described in detail below with reference to the drawings.

Refer to Figure 1. FIG. 1 is a schematic structural diagram of a first embodiment of a hot water boiler according to the present invention. It is composed of a base 1 and a heat exchanger 2 and a heat fan 3 installed on the base 1. The side wall and the upper wall of the base 1 are sandwich structures 1 3. It is composed of an inner wall 11 and an outer wall 12. The sandwich structure is provided with an inlet pipe 14 and an outlet pipe 15. The cold water absorbs the heat in the base 1 in the sandwich structure to preheat it and cool the base. The water outlet pipe 15 is connected to the return water pipe 2 4 1 of the water sprayer 2 4 in the heat exchanger 2 to be described below through a water pump (not shown in the figure), and sends pre-heated water to the water sprayer 24. The bottom of the inner cavity of the base 1 is a hot water storage chamber 16. The hot water storage chamber 16 stores heated water and supplies water to heating or bathing equipment through a water outlet pipe 16. A fire bowl 17 is also installed at the bottom of the inner cavity of the base 1, and the fire bowl 17 is lined with a refractory material. The fire bowl 17 can be supported on the bottom plate of the base 1 with feet 1 7 1. The base 1 is also provided with four legs 1 1 Q for supporting the entire furnace body, and the upper part of the internal water storage chamber 16 is a central heat exchange chamber 19. An overflow port 18 is provided above the water level line of the water storage chamber 19 to prevent the water level of the water storage chamber 16 from being too high. The heat exchanger 2 includes a cylinder 21. An exhaust pipe 22 is provided on the top of the cylinder 21. The upper part of the cylinder 2 1 is provided with a reinforcing ring 2 4 7. The inside of the cylinder is the internal cavity of the heat exchanger 2 3. A water sprayer 2 4 is provided on the upper surface of the inner cavity 2 3. The water sprayer is composed of a housing 2 4 2 and a plurality of nozzles 2 4 3 placed therein. The nozzles 2 4 3 can adopt the structure shown in FIG. 6 and FIG. 7. The nozzle 2 4 3 includes a cylindrical nozzle body 2 4 3 1, and a cover plate 2 4 3 2 is welded on the top thereof. The lower side wall of the nozzle body is processed with 1 to 4 tangential grooves 2 4 3 3 in the tangential direction. The bottom of 2 4 3 1 is welded to the bottom plate 2 4 9 of the sprinkler housing 2 4 2, and a spray hole 2 4 9 1 is processed on the bottom plate along the center axis of the nozzle body. The tangential grooves 2 4 3 3 have a groove width of 1.5 to 3 mm, a spray hole diameter of 2 to 5 mm, and a number of nozzles of 20 to 200. Two to eight cyclones 25 are provided below the water sprinkler 24, and a space of 20 to 50 mm is left between the cyclones. The role of the cyclones 25 is to make the following The hot air generated by the hot air blower 3 passes through the cyclone 25 to cause the swirling flow to rise, and it meets, mixes and is compatible with the water mist sprayed from the water sprayer 24 in the heat exchanger inner cavity 23 to perform the heat. Exchange so that the heat in the hot air is fully absorbed by the water mist. The lower surface of the inner cavity 23 of the heat exchanger barrel is in communication with the central heat exchange chamber 19 of the base.

Refer to the schematic structural diagram of the cyclone 25 according to the present invention shown in FIGS. 3 to 5. The cyclone 2 5 is composed of the cyclone outer ring 2 5 1, the cyclone fixing plate 2 5 2 and the long and short blades 2 5 3 fixed at an angle α of 30 ° to 60 ° with the horizontal plane therebetween. .

Refer to Figure 1 again. The hot air blower 3 is composed of a burner 3 1 mounted on the base 1 and an air compressor 3 2 arranged coaxially with the burner 3 1. The peripheral wall 3 1 1 of the burner 31 is provided with a heat insulation layer. The internal cavity of the burner 3 1 2 is equipped with fuel injectors 3 1 3 from the top to the bottom 3 1 3, the bottom plate of the flame tube 3 1 4, the cone sleeve 3 1 5, the flame tube of the four-stage inverted cone-shaped arrangement 3 1 6 Positioning sleeve 3 1 7. The lower end of the positioning sleeve 3 1 7 is aligned with the fire bowl 17 and communicates with the central heat exchange chamber 19.

Refer to FIG. 10 and FIG. 11. Figs. 10 and 11 show a front view and an Ε-Ε cross-sectional view of a fuel and gas dual-use fuel injector 3 1 3 used in the burner of the hot water boiler of the present invention. Of course, only fuel injectors or gas injectors can be installed as required. The gas injector consists of a ring-shaped hollow disk 3 1 3 2 connected to a gas input pipe 3 1 3 1. The lower panel 3 1 3 2 of the annular hollow disk 3 1 3 3 is densely covered with gas injection holes 3 1 3 4. At the center of the annular hollow disk 3 1 3 2 is installed a fuel injection pipe connected to the fuel inlet pipe 3 1 3 5 Grease nipple 3 1 3 6. The fuel injector 3 1 3 6 can always be pressed against the lower hollow plate 3 1 3 2 of the annular hollow disk 3 1 3 7 with the spring leaf 3 1 3 7. The fuel injector and the gas injector are used simultaneously in this embodiment. The fuel injector 3 1 3 may be suspended and supported on a partition 33 between the burner 31 and the compressor 32.

Refer to Figure 8 and Figure 9. Figures 8 and 9 show the structure of the intake channel 3 1 5 1 processed on the burner 3 1 cone sleeve 3 1 5. The intake channel 3 1 5 1 is arranged in a direction tangential to the inner wall of the cone sleeve. Intake channels can be set on the cone sleeve in 1 to 3 rows as required, and the total number can be 12 to 60. The upper and lower sides of the taper sleeve 3 1 5 can be connected with the flame tube bottom plate 3 1 4 and the flame tube 3 1 6 by flanges or connecting pieces.

The flame tubes 3 1 6 are arranged in an inverted cone shape. Four flame tubes are used in this embodiment. Air inlet holes 3 3 1 are machined in the side wall of the last stage flame tube. The flame tubes are nested with each other, and the external connecting pieces 3 1 9 are connected with each other.

Radial air intake gaps 3 2 9 are left between the bottom plate 3 1 4 of the flame tube and the upper end surface of the cone sleeve 3 1 5 and between the lower end surface of the cone sleeve 3 1 5 and the upper end surface of the first stage flame tube. Axial air intake gaps 3 2 9 1 are left between the flame tubes 3 1 6 and between the flame tubes 3 1 6 and the positioning sleeve 3 1 7 so that enough air can enter the flame tubes to assist the combustion and allow the fuel to burn fully. The compressor 3 2 includes a cylinder 3 2 1. The top of the inner wall of the cylinder 3 2 1 is also provided with a reinforcing ring 3 3 2 to increase the strength of the barrel 3 2 1. An upper cover plate 3 2 2 is provided on the top of the cylinder body 3 2 1. There is an air inlet 3 2 3 in the middle. Filters 3 4 are provided above and around the air inlets 3 2 3. A soundproof cover 3 2 4 is hoisted below the inner air inlet 3 2 3 of the cylinder 3 2 1. The soundproof cover 3 2 4 absorbs noise with a sound absorbing sponge 3 2 4 1 and is supported by a metal mesh 3 2 4 2 on the outside. The metal mesh is fixed on the frame 3 2 4 3 of the soundproof cover. The skeleton is hoisted on the upper cover plate 3 2 2 of the cylinder. Air can enter the cylinder 3 2 1 through the air inlet on the soundproof cover. Two impellers 3 2 6 driven by a motor 3 2 5 are installed in a cylinder body below the soundproof cover 3 2 4. Guide vanes 3 2 7 are provided under each impeller 3 2 6. The motor-driven impellers 3 2 6 and guide vanes 3 2 7 together constitute a compressor, which compresses the air and sends air to the burner 31. An air seal plate 3 3 0 is also provided on the outer side of the first-stage impeller 3 2 6 at the upper end of the motor 3 2 5, so that the air entering the cylinder 3 2 1 enters and is compressed by the first-stage impeller, and then passes through the guide vanes. 3 2 7 Send air to the secondary impeller located at the lower end of the motor to compress it, so that the pressure of the air sent to the burner is higher, and the fuel is burned more fully.

Refer to Figure 12. Fig. 12 is a structural schematic diagram of the impeller of the compressor 3 2 6. Among them, 3 2 5 1 is the output shaft of the motor, and 3 2 6 1 is the impeller shaft fitted on the motor shaft. 3 2 6 2 is the bottom plate of the impeller, and 3 2 6 3 and 3 2 6 4 represent the inner and outer rings of the impeller, respectively. 3 2 6 5, 3 2 6 6, 3 2 6 7 represent long, medium, and short leaves, respectively.

Refer to Figure 2. Fig. 2 is a second embodiment of the hot water boiler of the present invention. It is different from the hot water boiler shown in FIG. 1 in that a first stage sub-cyclone 5 and a sub-jet 6 are arranged on the water sprayer 2 4 of the heat exchanger 2. The auxiliary sprinkler 6 is connected to the cold water pipe. The colder cold water sprayed from the sub-water sprayer 6 is more conducive to absorbing the remaining heat contained in the hot gas to be discharged after the main cyclone has undergone sufficient heat exchange, so as to improve the thermal efficiency of the hot water furnace and reduce energy. waste.

When the hot water boiler of the present invention is in operation, the igniter (not shown in the figure) is first used to ignite the gas and fuel supplied by the fuel injector 3 1 3 and the compressor 32 is started at the same time. The fuel is fully combusted in the burner 31 by the air supplied by the compressor 32, and the flame hot air generated by the combustion flows to the central heat exchange chamber 19 of the base, and passes upward along the inner cavity 2 3 of the cylinder of the heat exchanger 2. The swirler 25 rises in a swirling flow, and is discharged through the exhaust pipe 22. At this time, the mist sprayed from the water sprinkler 24 flows into the hot water storage chamber 16 of the base 1 from top to bottom. The water mist meets, mixes, and is compatible with the hot air in the heat exchanger cavity 23 and the central heat exchange chamber 19, so that the heat of the fire is absorbed by the water mist. The heated hot water flows into the hot water storage tank 16 of the base, and then is sent from the outlet 16 1 to the place where hot water is needed.

The hot water heater of the invention can be used as a hot water source for residential or district heating equipment, and can also be used as a hot water source for washing water in households, hotels, baths, etc., or a hot water source for industrial hot water.

Claims

Rights request

1. A hot water stove, characterized by comprising a base (1), a heat exchanger (2) and a hot air fan (3) mounted on the base (1), side walls of the base (1) and a The wall is a sandwich structure (1 3) composed of an inner wall (1 1) and an outer wall (1 2). The sandwich structure is provided with an inlet pipe (1 4) and an outlet pipe (1 5), and the base (1) The bottom of the cavity is a hot water storage chamber (16) and is provided with a fire bowl (17). The upper part of the internal cavity water storage chamber is a central heat exchange chamber (19), and the water level of the water storage chamber is above the water level line. There are overflow holes (1 8); the heat exchanger (2) includes a heat exchanger barrel (2 1), and an exhaust pipe (2 2) is provided on the top of the heat exchanger barrel, and the inner cavity of the heat exchanger barrel ( 2

3) is provided with a water sprayer (24), a plurality of cyclones (2 5) are provided below the water sprayer, and the lower part of the inner cavity (2 3) of the heat exchanger barrel is connected with The central heat exchange chamber (19) is in communication with each other; the hot air fan (3) is composed of a burner (3 1) mounted on the base (1) and coaxial with the burner (3 1) above the burner (3 1) The air compressor (3 2) is arranged, the peripheral wall (3 1 1) of the burner (3 1) is provided with a heat insulation layer, and the inner cavity (3 1 2) of the burner is installed in order from top to bottom. Fuel injector (3 1 3), flame tube bottom plate

(3 1 4), taper sleeve (3 1 5), flame tubes (3 1 6) arranged in several cones in an inverted cone shape, positioning sleeve (3

1 7), the lower end opening (3 1 8) of the positioning sleeve is aligned with the fire bowl (1 7) and communicates with the central heat exchange chamber (1 9); the air compressor (3 2) includes A cylinder (3 2 1), an upper cover plate (3 2) of the cylinder

2) An air inlet (3 2 3) is provided, and a soundproof cover (3 2 4) is installed on the top of the cylinder (3 2 1). Impeller (3 2 6) and guide vane driven by motor (3 2 5)

(3 2 7) a compressor consisting of; the water outlet pipe (1 5) of the sandwich structure passes a water pump and the water jet (2

4) The return water pipe (2 4 1) is connected.

2. The hot water boiler according to claim 1, characterized in that: the water sprayer (2) of the heat exchanger (2)

4) is further provided with at least one secondary cyclone (5), and a secondary water jet (6) is provided on the secondary cyclone, and the water inlet of the secondary water jet and the water pipe ( 7) Connected.

3. The hot water furnace according to claim 1 or 2, characterized in that the water sprayer (2 4) comprises a casing (2 4 2) and a plurality of nozzles (2 4) placed in the casing. 3), the outer wall of the casing is provided with a tap water inlet (2 4 4), and the casing is provided with a separation ring for tap water and return water (2 4 5); 4 2) A return water filter (2 4 6) is provided.

4. The hot water furnace according to claim 3, characterized in that the cyclone (2 5) is formed by a cyclone outer ring (2 5 1), a cyclone fixing plate (2 5 2), and fixed It consists of several blades (2 5 3) at an angle of 30 ~ 60 ° with the horizontal plane.

5. The hot water boiler according to claim 4, characterized in that there are 2-8 cyclones (25).

6. The hot water furnace according to claim 5, characterized in that: the lowermost cyclone (2

5) A plurality of cyclone supporting feet (2 4 8) are supported on the base (1).

7. The hot water furnace according to claim 1, 2, 4, 5 or 6, characterized in that: the flame tube bottom plate (3 1 4) and the cone sleeve (3 1 5) of the burner [3 1) The flame tube (3 1 6) and the positioning sleeve (3 1 7) are provided with a radial gap (3 2 8) or an axial gap (3 2 9 1) with each other. The side wall of the cylinder (3 1 6) is provided with a plurality of ventilation holes (3 3 1).

8. The hot water furnace according to claim 3, characterized in that: the flame tube bottom plate (3 1 4), the cone sleeve (3 1 5), and the flame tube (3 1 6) of the burner (3 1). The positioning sleeves (3 1 7) are provided with a diameter between each other. A radial gap (3 2 8) or an axial gap (3 2 9 1), the side wall of the last stage of the flame tube (3 1 6) is provided with a plurality of vent holes (3 3 1).

9. The hot water furnace according to claim 7, characterized in that: the side wall of the cone sleeve (3 1 5) of the burner (31) is provided with a width of 1 to 5 mm tangent to the inner wall of the cone sleeve Several intake channels (3 1 5 1).

10. The hot water boiler according to claim 9, characterized in that: there are two impellers of the air compressor [3 2], and the impellers are respectively arranged at two ends of the electric motor (3 2 5), wherein An air-sealing plate (330) is provided on the upper side of the outer side of the first-stage impeller at the upper end of the electric motor (325).

1 1. The hot water furnace according to claim 8, 9, or 10, characterized in that: under the nozzle body (2 4 3 1) of the nozzle (2 4 3) of the water sprayer (2 4) The side wall is provided with 1 to 4 tangential grooves (2 4 3 3) along the tangential direction.

12. The hot water boiler according to claim 11, characterized in that: the fuel injector (31) of the burner (31) is a dual-use fuel oil and gas injector.

13. The hot water boiler according to claim 12, characterized in that: an impeller (3 2 6) of the air compressor (3 2) comprises a long blade (3 2 6 5) and a middle blade (3 2 6 6) and short leaves (3 2 6 7).