CN116481173A - Combustion heat exchange device, dual-purpose furnace and control method thereof - Google Patents

Combustion heat exchange device, dual-purpose furnace and control method thereof Download PDF

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Publication number
CN116481173A
CN116481173A CN202310336782.5A CN202310336782A CN116481173A CN 116481173 A CN116481173 A CN 116481173A CN 202310336782 A CN202310336782 A CN 202310336782A CN 116481173 A CN116481173 A CN 116481173A
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CN
China
Prior art keywords
heat exchange
air
smoke exhaust
vent hole
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310336782.5A
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Chinese (zh)
Inventor
秦刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Fotile Kitchen Ware Co Ltd
Original Assignee
Ningbo Fotile Kitchen Ware Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Fotile Kitchen Ware Co Ltd filed Critical Ningbo Fotile Kitchen Ware Co Ltd
Priority to CN202310336782.5A priority Critical patent/CN116481173A/en
Publication of CN116481173A publication Critical patent/CN116481173A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/72—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with backwash arms, shoes or nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/124—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/14—Cleaning; Sterilising; Preventing contamination by bacteria or microorganisms, e.g. by replacing fluid in tanks or conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
    • F24H15/429—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data for selecting operation modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/0042—Cleaning arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Computer Hardware Design (AREA)
  • Geometry (AREA)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)

Abstract

The invention discloses a combustion heat exchange device, which comprises an outer shell (11), an inner shell (12), an air supplementing pipeline (15) and a smoke exhaust pipeline (16), and is characterized in that: the inside of the air supplementing pipeline (15) is provided with an air supplementing flow channel (151), a filter (18) is arranged in the air supplementing flow channel (151), the filter (18) comprises a filter cylinder (181) and is provided with a filter hole (1811); a baffle plate (182) covering the port of the filter cartridge (181) facing the inlet end of the air supplementing flow channel (151); and an ash collecting box (183) provided with an annular ash collecting groove (1831), wherein the inner annular wall is connected with the end edge of the filter cylinder (181) facing the outlet end of the air supplementing flow channel (151), and the outer annular wall is tightly attached to the peripheral wall of the air supplementing flow channel (151). The invention also discloses a control method of the combustion heat exchange device and a dual-purpose furnace with the combustion heat exchange device.

Description

Combustion heat exchange device, dual-purpose furnace and control method thereof
Technical Field
The invention relates to the technical field of heating equipment, in particular to a combustion heat exchange device, a dual-purpose furnace and a control method thereof.
Background
At present, some houses are provided with a hydrothermal heating device such as floor heating, and in these houses, in addition to domestic water supply, additional water supply is required to the corresponding hydrothermal heating device to perform heating. Therefore, the common gas water heater cannot supply hot water of domestic water and heating water of the hydrothermal heating equipment at the same time, and a dual-purpose stove is required to supply hot water and heating water of the domestic water at the same time.
In the existing dual-purpose furnace, a three-way valve is used for switching control in the internal circulation and the external circulation: under the heating mode, the dual-purpose furnace is switched to external circulation, the heat exchange pipeline is communicated with the heating pipeline, and under the action of the circulating pump, water in the heat exchange pipeline is heated by the combustion heat exchange device and then is discharged into the heating pipeline, and the hot water flows through each room through the external circulation, so that heating is realized; under the domestic hot water mode, the dual-purpose stove is switched to the inner loop, the heat exchange pipeline forms a circulation loop, and under the action of the circulating pump, hot water exchanges heat with the domestic water pipeline when flowing through the heat exchanger through the inner loop, so that domestic hot water is supplied, at the moment, the heat exchange pipeline is not communicated with the heating pipeline, the outer loop is interrupted, water in the heating pipeline is dead water, and heating is automatically stopped until the domestic hot water is used. For a specific structure, see the Chinese patent application No. CN201710624991.4 (publication No. CN 108061375A) of the applicant's prior application, namely, a dual-purpose furnace working system.
The combustion heat exchange device mainly comprises a heat exchanger, a burner for supplying heat to the heat exchanger and a fan for supplementing air to the burner and exhausting flue gas.
However, after the existing combustion heat exchange device on the market is used for a long time, the condition of dust accumulation of internal parts often occurs, especially dust accumulation on fan blades is most obvious, and when dust accumulation occurs, the wind power of a fan can be greatly weakened, so that insufficient combustion is caused during the period, the gas loss is high, even the carbon accumulation is caused to damage the parts, and the service life of a machine is influenced.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a combustion heat exchange device capable of avoiding dust accumulation of internal parts aiming at the current state of the art.
The second technical problem to be solved by the invention is to provide a combustion heat exchange device capable of self-cleaning a filter.
The third technical problem to be solved by the invention is to provide a control method of the combustion heat exchange device.
The invention aims to provide a dual-purpose furnace with the combustion heat exchange device. The technical scheme adopted by the invention for solving the first technical problem is as follows: a combustion heat exchange device comprises a shell;
the inner shell is arranged in the outer shell, an interlayer is arranged between the outer wall of the inner shell and the inner wall of the outer shell, and an air supplementing hole for communicating the inner cavity of the inner shell with the interlayer is formed in the inner shell;
a heat exchanger arranged in the inner shell;
the burner is arranged in the inner shell and is used for supplying heat to the heat exchanger;
the air supplementing pipeline is connected to the shell and used for supplementing air into the interlayer;
the smoke exhaust pipeline is connected to the inner shell and used for exhausting smoke in the inner shell; and
the fan is used for exhausting the smoke in the inner shell through the smoke exhaust pipeline;
the method is characterized in that: the inside of the air supplementing pipeline is provided with an air supplementing flow passage, a filter is arranged in the air supplementing flow passage, and the filter comprises
The filter cartridge is coaxially arranged in the air supplementing flow channel and is provided with a plurality of filter holes which are arranged at intervals;
the baffle is covered at a port of the filter cartridge, which faces to one end of the air supplementing flow channel inlet; and
the inside of the ash collecting box is provided with an annular ash collecting groove, an opening of the ash collecting groove faces upwards, an inner annular wall of the ash collecting box is connected with an end edge of the filter cartridge, which faces to one end of the air supplementing flow passage outlet, and an outer annular wall of the ash collecting box is clung to the peripheral wall of the air supplementing flow passage.
In order to preheat cold air and cool high-temperature flue gas, the smoke exhaust pipeline is at least partially accommodated in the air supplementing pipeline, an air supplementing flow passage is formed between the smoke exhaust pipeline and the air supplementing pipeline, and a through hole for the smoke exhaust pipeline to pass through is formed in the baffle plate.
In order to further solve the second technical problem, the position of the smoke exhaust pipeline, which is opposite to the filter cartridge, is provided with a plurality of air vents which are arranged at intervals, and the air vents and the air passage of the smoke exhaust pipeline, which is positioned at the downstream of the air vents, are respectively provided with a valve, so that the combustion heat exchange device has at least two states:
in a first state, the flow channel inside the smoke exhaust pipeline is communicated with the flow channel at the downstream of the vent hole, and the vent hole is closed, so that the air flow in the inner shell is discharged to the outside atmosphere through the flow channel inside the smoke exhaust pipeline;
in the second state, the flow passage inside the smoke exhaust pipeline at the downstream of the vent hole is disconnected, and the vent hole is opened, so that the air flow in the inner shell sequentially passes through the flow passage inside the smoke exhaust pipeline at the upstream of the vent hole and the vent hole to blow to the filtering hole of the filter cartridge.
In order to simplify the arrangement of the valve, the vent hole and the runner positioned at the downstream of the vent hole in the smoke exhaust pipeline share the same valve.
In order to realize that the vent hole and the flow passage inside the smoke exhaust pipeline and positioned at the downstream of the vent hole share the same valve, the valve comprises
The fixed plate is transversely arranged at the runner position, which is positioned at the downstream of the vent hole, inside the smoke exhaust pipeline and provided with a first flow hole;
the movable plate is arranged side by side with the fixed plate and is provided with second flow holes staggered with the first flow holes;
the movable sleeve is coaxially arranged in the smoke exhaust pipeline and is connected with the movable plate; and
the driving piece is arranged on the fixed plate, is in transmission connection with the movable plate and is used for driving the movable plate and the movable sleeve to move relative to the fixed plate;
in the first state, the movable plate is far away from the fixed plate so that the first flow hole and the second flow hole are communicated; the movable sleeve covers the vent hole;
in the second state, the movable plate is closely attached to the fixed plate so as to disconnect the first flow hole from the second flow hole; the movable sleeve releases the cover of the vent hole.
In order to facilitate the driving of the driving piece to the movable plate, the driving piece is a motor, the power output shaft of the driving piece is a screw rod, and the screw rod is in threaded connection with the middle position of the movable plate.
In order to automatically start the self-cleaning function, a wind pressure sensor is arranged at the position of the runner positioned at the upstream of the vent hole in the smoke exhaust pipeline, the combustion heat exchange device is provided with a controller, and the wind pressure sensor, the burner and valves positioned at the positions of the vent hole and the runner positioned at the downstream of the vent hole in the smoke exhaust pipeline are electrically connected with the controller, so that the controller can receive signals acquired by the wind pressure sensor and control the opening and closing of the burner and the valves.
The technical scheme adopted by the invention for solving the third technical problem is as follows: the control method of the combustion heat exchange device is characterized by comprising the following steps:
(1) In the initial state, the controller starts a normal running program: starting a burner and a fan, switching the combustion heat exchange device to a first state through a valve, at the moment, communicating a flow passage positioned at the downstream of a vent hole in a smoke exhaust pipeline, closing the vent hole, filtering air through a filter cylinder by an air supplementing flow passage under the action of the fan, supplementing the air into an interlayer, supplementing the air into an inner shell by an air supplementing hole, discharging smoke formed by the combustion of the burner to the outside atmosphere through the smoke exhaust pipeline, and gradually blocking a filtering hole by dust in the air in the filtering process of the filter cylinder;
(2) When the real-time wind pressure P monitored by the wind pressure sensor is smaller than the set value Pmin, the controller starts a self-cleaning program: firstly closing the burner, then switching the combustion heat exchange device to a second state through a valve, at the moment, disconnecting a flow passage positioned at the downstream of a vent hole in the smoke exhaust pipeline, opening the vent hole, and blowing air flow in the inner shell to a filtering hole of the filter cylinder sequentially through the flow passage positioned at the upstream of the vent hole in the smoke exhaust pipeline, so that blocked dust is blown open, and the blown dust gradually subsides into an ash collecting groove;
(3) When the real-time wind pressure P monitored by the wind pressure sensor is larger than the set value Pmax, the controller resumes the normal operation procedure.
The technical scheme adopted by the invention for solving the fourth technical problem is as follows: a dual-purpose furnace with the combustion heat exchange device is provided.
In order to realize domestic hot water and heating functions, the heat exchanger is provided with a heat exchange channel;
and also include
The heat exchanger is internally provided with a hot water channel and a cold water channel which exchange heat with each other;
the heat exchange pipeline comprises a first heat exchange section and a second heat exchange section which are connected in sequence, wherein at least part of the first heat exchange section passes through a heat exchange channel of the heat exchanger, and at least part of the second heat exchange section passes through a hot water channel of the heat exchanger;
the heating water inlet pipe and the heating water outlet pipe are respectively connected to two ends of the first heat exchange section and are respectively connected with two ends of an external heating pipeline;
the life water inlet pipe and the life water outlet pipe are respectively connected to two ends of the cold water channel of the heat exchanger; and
the conveying pump is arranged on the first heat exchange section;
valves are arranged on the second heat exchange section and the heating water outlet pipe, so that the dual-purpose furnace has at least two working modes:
in the domestic hot water mode, the second heat exchange section is communicated, and the heating water outlet pipe is disconnected;
in the heating state, the second heat exchange section is disconnected, and the heating water outlet pipe is communicated.
Compared with the prior art, the invention has the advantages that:
(1) The filter is arranged in the air supplementing flow channel through the filter cartridge, the baffle and the ash collecting box, dust in the air can be filtered by the filter cartridge in the process that the air flows through the air supplementing flow channel, and part of dust can be settled into the ash collecting groove under the action of gravity;
(2) The position of the smoke exhaust pipeline opposite to the filter cartridge is provided with a plurality of vent holes which are arranged at intervals, and a valve is arranged at the vent holes and the runner which is positioned at the downstream of the vent holes in the smoke exhaust pipeline:
when the air filter is in normal operation, the combustion heat exchange device can be switched to a first state through the valve, at the moment, the flow channel inside the smoke exhaust pipeline is positioned at the downstream of the air vent, the air vent is closed, under the action of the fan, air is supplemented into the interlayer after being filtered by the filter cartridge through the air supplementing flow channel, and then is supplemented into the inner shell through the air supplementing hole, flue gas formed by the combustion of the burner is discharged to the outside atmosphere through the smoke exhaust pipeline, and in the filtering process of the filter cartridge, dust in the air can gradually block the filtering hole;
when self-cleaning is needed, the combustion heat exchange device can be switched to a second state through the valve, at the moment, the flow passage inside the smoke exhaust pipeline and positioned at the downstream of the vent hole is disconnected, the vent hole is opened, the air flow in the inner shell sequentially passes through the flow passage inside the smoke exhaust pipeline and positioned at the upstream of the vent hole, and the vent hole blows to the filtering hole of the filter cylinder, so that the blocked dust is blown open, and the blown dust gradually subsides into the dust collecting groove.
Drawings
FIG. 1 is a schematic view of an embodiment of the dual-purpose furnace of the present invention in a first state (arrows indicate airflow direction);
FIG. 2 is a partially exploded perspective view of the combustion heat exchange apparatus of FIG. 1 (arrows indicate airflow direction);
FIG. 3 is an enlarged view of a portion of the combustion heat exchange apparatus of FIG. 1 (arrows indicate airflow direction);
fig. 4 is a schematic view of the combustion heat exchange device in fig. 3 after being switched to the second state (arrows indicate airflow directions).
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 4, a preferred embodiment of the dual-purpose furnace of the present invention is shown. The dual-purpose furnace comprises a combustion heat exchange device 1, a heat exchanger 2, a heat exchange pipeline 3, a heating water inlet pipe 4a, a heating water outlet pipe 4b, a living water inlet pipe 5a, a living water outlet pipe 5b, a delivery pump 6 and a three-way valve 7.
The combustion heat exchange device 1 comprises an outer shell 11, an inner shell 12, a heat exchanger 13, a combustor 14, a gas supplementing pipeline 15, a smoke exhausting pipeline 16, a fan 17, a filter 18 and a valve 19.
Specifically, the inner shell 12 is disposed within the outer shell 11, and an interlayer 111 is provided between an outer wall of the inner shell 12 and an inner wall of the outer shell 11; the bottom of the inner shell 11 is connected with a gas pipeline 121 for supplying gas to the burner 14, and a proportional valve 1211 for adjusting the gas quantity is arranged on the gas pipeline 121; the bottom wall of the inner shell 12 is provided with a plurality of air supplementing holes 122 for communicating the inner cavity of the inner shell 12 with the interlayer 111.
The heat exchanger 13 is provided in the middle of the inner cavity of the inner shell 12, and has a heat exchange passage therein.
A burner 14 is provided at a lower portion of the inner cavity of the inner case 12 for supplying heat to the heat exchanger 13.
A make-up air line 15 is connected to the top of the housing 11 for making up air in the interlayer 111.
A smoke exhaust duct 16 is connected to the top of the inner casing 12 for exhausting smoke inside the inner casing 12; a wind pressure sensor 162 is installed at the inlet of the smoke exhaust duct 16 and is used for monitoring the wind pressure at the inlet of the smoke exhaust duct 16; in this embodiment, the smoke exhaust duct 16 is accommodated in the smoke supplementing duct 15, and a gas supplementing flow channel 151 is formed between the outer peripheral wall of the smoke exhaust duct 16 and the inner peripheral wall of the smoke supplementing duct 15, so that the cold air in the gas supplementing flow channel 151 can exchange heat with the high-temperature smoke in the smoke exhaust duct 16 sufficiently, and the high-temperature smoke is cooled while the cold air is preheated.
A fan 17 is installed at an inlet of the smoke exhaust duct 16 for exhausting the smoke in the inner case 12 through the smoke exhaust duct 16.
The filter 18 is disposed in the air supplementing flow channel 151 and comprises a filter cartridge 181, a baffle 182 and an ash collecting box 183. The filter cartridge 181 is vertically and coaxially arranged in the air supplementing flow channel 151, a plurality of filter holes 1811 which are arranged at intervals are formed in the peripheral wall of the filter cartridge 181, and a plurality of vent holes 161 which are arranged at intervals are formed in the position, opposite to the filter cartridge 181, of the smoke exhaust pipeline 16; the baffle 182 covers the port at the top end of the filter cartridge 181, and a perforation 1821 for the smoke exhaust pipe 16 to pass through is formed on the baffle 182; the ash collecting box 183 is internally provided with an annular ash collecting groove 1831, the opening of the ash collecting groove 1831 faces upwards, the inner annular wall of the ash collecting box 183 is connected with the end edge of the bottom end of the filter cartridge 181, and the outer annular wall of the ash collecting box 183 is tightly attached to the inner peripheral wall of the air supplementing pipeline 15. The filter 18 can effectively filter dust in the inlet air, prevent the dust from directly entering the machine, ensure the full combustion on one hand, prevent carbon deposition from damaging parts on the other hand, and reduce the noise of the whole machine.
The valve 19 includes a fixed plate 191, a movable plate 192, a movable sleeve 193, and a driving member 194. The fixing plate 191 is transversely arranged at a runner position above the vent hole 161 in the smoke exhaust pipeline 16, and a plurality of first flow holes 1911 which are circumferentially arranged at intervals are formed in the periphery of the fixing plate 191; the movable plate 192 is arranged below the fixed plate 191 side by side, the middle part of the movable plate 192 is provided with a plurality of second flow holes 1921 which are arranged at intervals along the circumferential direction, and the second flow holes 1921 are staggered with the first flow holes 1911; the movable sleeve 193 is vertically and coaxially arranged in the smoke exhaust duct 16, and the top end is connected with the bottom wall of the movable plate 192; the driving member 194 is a motor, is mounted on the fixed plate 191, and has a downwardly extending power output shaft, which is a screw 1941, screw-coupled to the middle position of the movable plate 192.
The driving member 194 is started to drive the screw rod 1941 to rotate, so as to drive the movable plate 192 and the movable sleeve 193 to lift relative to the fixed plate 191, so that the above-mentioned combustion heat exchange device 1 has at least two states:
in the first state, as shown in fig. 3, the movable plate 192 is away from the fixed plate 191 to communicate the first and second flow holes 1911 and 1921, so that the flow passage inside the smoke exhaust duct 16 above (i.e., moving down) the vent hole 161 is communicated, and at the same time, the movable sleeve 193 covers the vent hole 161 to close the vent hole 161, so that the air flow inside the inner case 12 can be exhausted to the outside atmosphere through the flow passage inside the smoke exhaust duct 16;
in the second state, as shown in fig. 4, the movable plate 192 is closely attached to the fixed plate 191 so that the first and second flow holes 1911 and 1921 are disconnected, thereby disconnecting the flow passage located above (i.e., moving downward from) the vent hole 161 in the smoke exhaust duct 16, and at the same time, the movable sleeve 193 releases the cover of the vent hole 161 so that the vent hole 161 is opened, and thus the air flow in the inner case 12 sequentially passes through the flow passage located below (i.e., upstream of) the vent hole 161 in the smoke exhaust duct 16 and the vent hole 161 is blown toward the filter hole 1811 of the filter cartridge 181.
In addition, the above-mentioned combustion heat exchange device 1 has a controller, and the wind pressure sensor 162, the burner 14 and the driving member 194 are electrically connected to the controller, so that the controller can receive the signals collected by the wind pressure sensor 162 and control the opening and closing of the burner 14 and the driving member 194.
The heat exchanger 2 has a hot water passage and a cold water passage which exchange heat with each other.
The heat exchange pipeline 3 is a circulating pipeline and comprises a first heat exchange section 31 and a second heat exchange section 32 which are connected in sequence. Specifically, the first heat exchange section 31 partially passes through the heat exchange passage of the heat exchanger 13, and the second heat exchange section 32 partially passes through the hot water passage of the heat exchanger 2.
The heating water inlet pipe 4a and the heating water outlet pipe 4b are respectively connected to the inlet end and the outlet end of the first heat exchange section 31, and are respectively connected to two ends of an external heating pipeline.
The life water inlet pipe 5a and the life water outlet pipe 5b are respectively connected at two ends of the cold water channel of the heat exchanger 2.
The transfer pump 6 is mounted on the first heat exchange section 31 and is capable of transferring a flow of water from the inlet end of the first heat exchange section 31 to the outlet end of the first heat exchange section 31.
The three-way valve 7 is provided with a water inlet end, a first water outlet end and a second water outlet end, the water inlet end of the three-way valve 7 is communicated with the outlet end of the first heat exchange section 31, the first water outlet end of the three-way valve 7 is communicated with the inlet end of the second heat exchange section 32, the second water outlet end of the three-way valve 7 is communicated with the heating water outlet pipe 4b, and the on-off of the second heat exchange section 32 and the heating water outlet pipe 4b can be controlled by adjusting the three-way valve 7.
By adjusting the three-way valve 7, the dual-purpose stove has at least two modes of operation:
in the domestic hot water mode, the second heat exchange section 32 is communicated, and the heating water outlet pipe 4b is disconnected, so that the heat exchange pipeline 3 forms a circulation loop independently, namely the internal circulation in the background art;
in the heating mode, the second heat exchange section 32 is disconnected, and the heating water outlet pipe 4b is connected, so that the heating water inlet pipe 4a, the first heat exchange section 31, the heating water outlet pipe 4b and the external heating pipeline form a circulation loop together, namely, the external circulation in the background art.
The invention also provides a control method of the dual-purpose furnace, which comprises the following steps:
(1) In the initial state, the controller starts a normal running program: the burner 14 and the fan 17 are started, the control driving member 194 switches the combustion heat exchange device 1 to a first state, at this time, as shown in fig. 1 and 3, a flow passage above the vent hole 161 in the smoke exhaust pipe 16 is communicated, the vent hole 161 is closed, under the action of the fan 17, air is filtered by the air supplementing flow passage 151 through the filter cylinder 181 and then supplemented into the interlayer 111, and then supplemented into the inner shell 12 through the air supplementing hole 122, the smoke generated by the combustion of the burner 14 is discharged to the outside atmosphere through the smoke exhaust pipe 16, during the filtering process of the filter cylinder 181, dust in the air gradually blocks the filtering hole 1811 to influence the air inlet of the air supplementing flow passage 151, and part of the dust is settled into the dust collecting groove 1831 under the action of gravity;
(2) In the normal operation process, when the real-time wind pressure P monitored by the wind pressure sensor 162 is smaller than the set value Pmin, the air inlet blockage of the air supplementing flow channel 151 is determined, and the controller starts a self-cleaning program: firstly, the burner 14 is closed, then the driving piece 194 is controlled to switch the combustion heat exchange device 1 to a second state, at the moment, a flow passage above the vent hole 161 in the smoke exhaust pipeline 16 is disconnected, the vent hole 161 is opened, airflow in the inner shell 12 sequentially passes through the flow passage below the vent hole 161 in the smoke exhaust pipeline 16 and the vent hole 161 to blow to the filtering hole 1811 of the filter cylinder 181, so that blocked dust is blown off, and the blown dust gradually subsides into the dust collecting groove 1831, so that the smoothness of the filter 18 is realized;
(3) When the real-time wind pressure P detected by the wind pressure sensor 162 is greater than the set value Pmax, the controller resumes the normal operation procedure.

Claims (10)

1. A combustion heat exchange device comprises
A housing (11);
an inner shell (12) arranged in the outer shell (11), an interlayer (111) is arranged between the outer wall of the inner shell (12) and the inner wall of the outer shell (11), and an air supplementing hole (122) used for communicating the inner cavity of the inner shell (12) with the interlayer (111) is arranged on the inner shell (12);
a heat exchanger (13) provided in the inner case (12);
a burner (14) provided in the inner case (12) for supplying heat to the heat exchanger (13);
a gas supplementing pipe (15) connected to the housing (11) for supplementing air into the interlayer (111);
a smoke exhaust pipe (16) connected to the inner shell (12) for exhausting smoke in the inner shell (12); and
a fan (17) for exhausting the flue gas in the inner shell (12) through a flue gas exhaust pipe (16);
the method is characterized in that: the inside of the air supplementing pipeline (15) is provided with an air supplementing flow channel (151), a filter (18) is arranged in the air supplementing flow channel (151), and the filter (18) comprises
A filter cylinder (181) coaxially arranged in the air supplementing flow channel (151) and provided with a plurality of filter holes (1811) which are arranged at intervals;
a baffle plate (182) covering the port of the filter cartridge (181) facing the inlet end of the air supplementing flow channel (151); and
the ash collecting box (183) is internally provided with an annular ash collecting groove (1831), an opening of the ash collecting groove (1831) faces upwards, an inner annular wall of the ash collecting box (183) is connected with an end edge of the filter cartridge (181) facing to one end of the outlet of the air supplementing flow channel (151), and an outer annular wall of the ash collecting box (183) is tightly attached to the peripheral wall of the air supplementing flow channel (151).
2. The combustion heat exchange apparatus as set forth in claim 1, wherein: the smoke exhaust pipeline (16) is at least partially accommodated in the air supplementing pipeline (15), the air supplementing flow channel (151) is formed between the smoke exhaust pipeline and the air supplementing flow channel, and the baffle plate (182) is provided with a perforation (1821) for the smoke exhaust pipeline (16) to pass through.
3. The combustion heat exchange apparatus as set forth in claim 2, wherein: the position of the smoke exhaust pipeline (16) right facing the filter cartridge (181) is provided with a plurality of air vents (161) which are arranged at intervals, and the air vents (161) and the flow passage of the smoke exhaust pipeline (16) positioned at the downstream of the air vents (161) are respectively provided with a valve, so that the combustion heat exchange device has at least two states:
in a first state, the flow passage inside the smoke exhaust pipeline (16) is communicated with the flow passage at the downstream of the vent hole (161), and the vent hole (161) is closed so that the air flow in the inner shell (12) is discharged to the outside atmosphere through the flow passage inside the smoke exhaust pipeline (16);
in the second state, the flow passage inside the smoke exhaust pipe (16) located at the downstream of the vent hole (161) is disconnected, and the vent hole (161) is opened, so that the air flow in the inner shell (12) sequentially passes through the flow passage inside the smoke exhaust pipe (16) located at the upstream of the vent hole (161) and the vent hole (161) to blow to the filtering hole (1811) of the filtering cylinder (181).
4. A combustion heat exchange apparatus as claimed in claim 3, wherein: the vent hole (161) and a runner positioned at the downstream of the vent hole (161) inside the smoke exhaust pipeline (16) share the same valve (19).
5. The combustion heat exchange apparatus as set forth in claim 4, wherein: the valve (19) comprises
A fixed plate (191) transversely arranged at a flow passage positioned at the downstream of the vent hole (161) in the smoke exhaust pipeline (16), and provided with a first flow hole (1911);
a movable plate (192) arranged in parallel with the fixed plate (191) and provided with second flow holes (1921) staggered with the first flow holes (1911);
a movable sleeve (193) coaxially arranged in the smoke exhaust pipe (16) and connected with the movable plate (192); and
the driving piece (194) is arranged on the fixed plate (191) and is in transmission connection with the movable plate (192) to drive the movable plate (192) and the movable sleeve (193) to move relative to the fixed plate (191);
in a first state, the movable plate (192) is far away from the fixed plate (191) so as to enable the first flow hole (1911) to be communicated with the second flow hole (1921); said movable sleeve (193) covers said vent hole (161);
in the second state, the movable plate (192) is closely attached to the fixed plate (191) so as to disconnect the first flow hole (1911) from the second flow hole (1921); the movable sleeve (193) releases the cover of the vent hole (161).
6. The combustion heat exchange apparatus as set forth in claim 5, wherein: the driving piece (194) is a motor, the power output shaft of the driving piece is a screw rod (1941), and the screw rod (1941) is in threaded connection with the middle position of the movable plate (192).
7. The combustion heat exchange apparatus as set forth in any one of claims 3 to 6, wherein: the air pressure sensor (162) is arranged at the runner position, located at the upstream of the air vent (161), inside the smoke exhaust pipeline (16), the combustion heat exchange device is provided with a controller, the air pressure sensor (162), the burner (14) and valves, located at the downstream of the air vent (161), inside the air vent (161) and the smoke exhaust pipeline (16), are electrically connected with the controller, so that the controller can receive signals acquired by the air pressure sensor (162) and control the opening and closing of the burner (14) and the valves.
8. A control method of a combustion heat exchange apparatus according to claim 7, comprising the steps of:
(1) In the initial state, the controller starts a normal running program: starting a burner (14) and a fan (17), switching a combustion heat exchange device to a first state through a valve, at the moment, communicating a flow passage positioned at the downstream of a vent hole (161) in a smoke exhaust pipeline (16), closing the vent hole (161), filtering air through a filter cylinder (181) through an air supplementing flow passage (151) under the action of the fan (17), supplementing the air into an interlayer (111), supplementing the air into an inner shell (12) through an air supplementing hole (122), and discharging smoke formed by the burner (14) to the outside atmosphere through the smoke exhaust pipeline (16), wherein dust in the air gradually blocks a filtering hole (1811) in the filtering process of the filter cylinder (181);
(2) When the real-time wind pressure P monitored by the wind pressure sensor (162) is smaller than the set value Pmin, the controller starts a self-cleaning program: firstly closing a combustor (14), switching the combustion heat exchange device to a second state through a valve, at the moment, disconnecting a flow passage positioned at the downstream of a vent hole (161) in the smoke exhaust pipeline (16), opening the vent hole (161), and blowing air flow in the inner shell (12) to a filtering hole (1811) of the filter cylinder (181) sequentially through the flow passage positioned at the upstream of the vent hole (161) in the smoke exhaust pipeline (16), blowing off dust which causes blocking, and gradually settling the blown dust into an ash collecting groove (1831);
(3) When the real-time wind pressure P monitored by the wind pressure sensor (162) is larger than the set value Pmax, the controller resumes the normal operation procedure.
9. A dual-purpose furnace using the combustion heat exchange device according to any one of claims 1 to 7.
10. The dual-purpose furnace of claim 9, wherein: the heat exchanger (13) is provided with a heat exchange channel;
and also include
A heat exchanger (2) having a hot water channel and a cold water channel which exchange heat with each other;
the heat exchange pipeline (3) comprises a first heat exchange section (31) and a second heat exchange section (32) which are connected in sequence, wherein at least part of the first heat exchange section (31) passes through a heat exchange channel of the heat exchanger (13), and at least part of the second heat exchange section (32) passes through a hot water channel of the heat exchanger (2);
a heating water inlet pipe (4 a) and a heating water outlet pipe (4 b) are respectively connected with two ends of the first heat exchange section (31) and are respectively connected with two ends of an external heating pipeline;
a life water inlet pipe (5 a) and a life water outlet pipe (5 b) are respectively connected to two ends of the cold water channel of the heat exchanger (2); and
a transfer pump (6) mounted on said first heat exchange section (31);
valves are arranged on the second heat exchange section (32) and the heating water outlet pipe (4 b) so that the dual-purpose furnace has at least two working modes:
in a domestic hot water mode, the second heat exchange section (32) is communicated, and the heating water outlet pipe (4 b) is disconnected;
in the heating state, the second heat exchange section (32) is disconnected, and the heating water outlet pipe (4 b) is communicated.
CN202310336782.5A 2023-03-31 2023-03-31 Combustion heat exchange device, dual-purpose furnace and control method thereof Pending CN116481173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310336782.5A CN116481173A (en) 2023-03-31 2023-03-31 Combustion heat exchange device, dual-purpose furnace and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310336782.5A CN116481173A (en) 2023-03-31 2023-03-31 Combustion heat exchange device, dual-purpose furnace and control method thereof

Publications (1)

Publication Number Publication Date
CN116481173A true CN116481173A (en) 2023-07-25

Family

ID=87216920

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310336782.5A Pending CN116481173A (en) 2023-03-31 2023-03-31 Combustion heat exchange device, dual-purpose furnace and control method thereof

Country Status (1)

Country Link
CN (1) CN116481173A (en)

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