WO2023143348A1

WO2023143348A1 - Active energy-saving heat preservation apparatus for coaxial air duct and flue wall-mounted stove

Info

Publication number: WO2023143348A1
Application number: PCT/CN2023/073052
Authority: WO
Inventors: 王天戈; 王艺达
Original assignee: 王天戈; 王艺达
Priority date: 2022-01-25
Filing date: 2023-01-19
Publication date: 2023-08-03
Also published as: CN217817422U

Abstract

The present application provides an active energy-saving heat preservation apparatus for coaxial air duct and flue wall-mounted stove. Butterfly valves of an air duct and a flue are controlled to be opened or closed according to an operation requirement, so that cold air is prevented from flowing back into the wall-mounted stove through the air duct and/or the flue when in a non-ignited state. According to manufacturing and installation conditions, the active energy-saving heat preservation apparatus for the wall-mounted stove has three implementation forms: an air duct and flue parallel axis control form, a coaxial air duct and flue control form, and an air duct and flue hybrid control form. In the present application, butterfly valves of the air duct and the flue are opened or closed synchronously with an ignition and operation process of the wall-mounted stove, ensuring that the air duct and the flue are unobstructed during ignition and operation of the wall-mounted stove, and the air duct and the flue are closed when the flame is turned off. The current wall-mounted stove is in a heat supply state during ignition and operation, and enters an opposite operating mode of a heat dissipation window after the flame is extinguished. A healthy operating mode of being in a heat supply state during ignition and being in an active heat preservation state after the flame is extinguished is achieved, and heat loss is effectively reduced, thereby achieving the dual purposes of active heat preservation and energy conservation.

Description

An active energy-saving heat preservation device for a wall-hung boiler in the form of coaxial air duct and flue

related application

This application claims the priority of the Chinese utility model patent application with the application number 202220240439.1 submitted on January 25, 2022, and the invention title is "An active energy-saving heat preservation device for wall-hung boilers with coaxial air duct and flue duct", all of which The contents are incorporated herein by reference.

technical field

This application relates to a gas (oil) heating (water) wall-hung boiler in the form of coaxial air duct and flue, in particular to an active energy-saving heat preservation device that can open or close the air duct and flue according to work needs, so as to prevent In the burning state, outdoor cold air invades the wall-hung boiler, resulting in loss of heat and fuel, so as to protect the wall-hung boiler. In particular, it relates to the active energy-saving and thermal insulation of gas wall-hung boilers with heating as the main function in cold regions.

Background technique

At present, natural gas is used more and more widely as a clean energy source, and the market share of gas wall-hung boilers is also increasing year by year, which has made a certain contribution to the construction of ecological civilization. The air inlet pipe and smoke exhaust pipe of the gas wall-hung boiler directly lead to the outside; when the wall-hung boiler is ignited, fresh air enters the air duct, and the fan exhausts the burned smoke to the outside through the flue. However, this product design has the following problems and disadvantages: 1. When the wall-hung boiler is off and on standby, the fan does not work, and cold outdoor air invades the wall-hung boiler through the air duct and/or flue. At this time, driven by the circulating water pump, all the heat energy of the heating system is exchanged through the heat exchanger, and the heat exchanger of the wall-hung boiler for heating becomes a radiator at this time. The lower the outdoor temperature, the greater the heat loss of the whole system. Seriously, precious heat energy is wasted; 2. Due to the rapid heat loss, the heat preservation time is shortened, the ignition frequency of the wall-hung boiler is increased, fuel consumption is increased, and precious energy is wasted; 3. The wall-hung boiler will start to prevent freezing after the flame is turned off. Passive antifreeze function, that is, the circulating water pump is always running, and all the heat in the system is used to keep the wall-hung boiler warm to avoid freezing damage. This mode shortens the service life of the circulating water pump and wastes precious electric energy; 4. In case of power failure, the circulating water If the water pump does not work, if the water cannot be released in time, the heat exchanger, water pump, pipeline, etc. of the wall-hung boiler will be damaged by freezing in a short time, which will bring great economic losses to the user; 5. The gas wall-hung boiler currently in production and in use Furnaces, large gas heating furnaces, and gas water heaters, except for some products with a single flue with simple anti-cold wind backflow devices, the double-layer pipes that are coaxial with the air inlet and smoke exhaust mostly use this system for hot water circulation, auxiliary electric heating and Passive antifreeze means such as starting combustion heating do not have an active anti-cold wind backflow device. The premise of its effective antifreeze is that the wall-hung boiler must be energized and ventilated. If the power is cut off and/or the gas is cut off, there is only one protection method left, which is extremely dangerous for an unattended wall-hung boiler.

Contents of the invention

In order to solve the above problems, the present application provides an active energy-saving heat preservation device for a wall-hung boiler in the form of coaxial air ducts and flue ducts. Its purpose is to actively control the opening or closing of the air duct and the flue according to the working state of the wall-hung boiler. That is, when the wall-hung boiler is ignited, the air duct and the flue are opened at the same time to ensure smooth air intake and smoke exhaust during the whole heating process. After the wall-hung boiler is turned off, the air duct and flue are closed at the same time, so as to prevent cold air from invading the furnace before the next ignition, so as to achieve the purpose of energy saving and heat preservation.

In order to achieve the above purpose, the active heat preservation and energy-saving technology provided by this application belongs to an active energy-saving heat preservation device for a wall-hung boiler in the form of coaxial air duct and flue. Executing mechanism; the switch circuit determines whether to supply power to the driver according to the working status of the wall-hung boiler. The driver actuator controls the opening or closing of the air duct and flue to realize active energy saving and heat preservation. There are three realization forms: 1. Air duct, flue parallel axis control form , with switch circuit, driver, air duct flue butterfly valve and driver actuator; Flue fixed partition, rotating section air duct flue, air duct rotating partition, flue rotating partition and driver actuator; 3. Air duct, flue mixed control form, equipped with switch circuit, driver, flue butterfly valve , air duct sealing plate and driver actuator; the drivers used in the three implementation forms all have the function of automatically returning to close the air duct and flue when the power is off.

An active energy-saving heat preservation device for a wall-hung boiler in the form of coaxial air duct and flue, which is specifically realized in the following way:

1. This application is composed of electrical signal or wind pressure signal sensor, switch circuit, driver, valve, air duct, flue, etc.; 2. According to the working status of the wall-hung boiler, the sensor extracts the electrical signal or wind pressure signal as the start of this application or stop command, choose one of electric signal and wind pressure signal; 3. When there is electric signal or wind pressure signal output when the wall-hung boiler is ignited, the switch circuit is closed to supply power to the driver, and the actuator actuator of the driver opens the air duct and the flue valve. The fireplace is functioning normally. After the wall-hung boiler is turned off, the electrical signal or wind pressure signal disappears, the switch circuit is disconnected, the driver is powered off, the driver actuator returns to its position, and the air duct and flue valve are closed.

In another aspect, since the application effectively prevents the intrusion of cold air when the wall-hung boiler is not ignited, the circulating water pump with the passive heat preservation function of the original wall-hung boiler can be changed to intermittent work during the active heat preservation process for a long time, which can effectively extend In addition, the electric heating part of some models can be saved, thereby reducing manufacturing costs, saving electric energy, and eliminating freezing damage. Compared with the current wall-hung boilers under the same technical parameters, it can effectively reduce fuel consumption and achieve energy saving, heat preservation, environmental protection purposes.

Since this application adopts the structure of blocking the intrusion of cold air during non-working hours, the following effects can be obtained: 1. The current wall-hung boiler is in a heating state when it is ignited, and it becomes a heat dissipation window after the flame is turned off. 2. In the case of the same outdoor temperature, the use of this application reduces the ignition frequency of the wall-hung boiler, and the energy-saving effect is obvious. The comparison data shows the same conditions 3. This application eliminates the intrusion of cold air from the air duct and flue, and can effectively extend the heat preservation time under the same conditions. The lower the outdoor temperature, the more obvious the heat preservation effect; 4. This application uses active The heat preservation mode can cancel the electric heating device for passive heat preservation of existing products, and reduce manufacturing costs; 5. The heat preservation of this application is not realized by the heat of the whole system, and the long-term operation of the circulating water pump of the existing product can be changed to intermittent operation, which can Effectively improve the service life of the circulating water pump and save electricity; 6. Since the driver of this application works with electricity, the characteristics of power failure and return determine that the driver can safely and effectively close the air duct and flue whenever the power is cut off, so as to truly realize active operation. Energy saving and heat preservation function.

Description of drawings

Fig. 1 is a top view of the mechanical part in the form of an air duct and a flue parallel to the axis of the present application.

Fig. 2 is a top view of the coaxial mechanical part of the air duct and the flue of the present application.

Fig. 3 is a front view of the mechanical part of the air duct and flue coaxial mixing control form of the present application.

Fig. 4 is a cross-sectional view along line A-A of Fig. 2 .

Detailed ways

The application will be described in further detail below in conjunction with the accompanying drawings.

The preferred embodiment of the present application is to change the coaxial form of the traditional air duct 2 outside and the inside of the flue 3 into the parallel axis form of the tubular parallel air duct 23 and the tubular parallel flue 33, as shown in Figure 1, this Figure 1 The shown mechanical structure is composed of a driver 1, a tubular parallel air duct 23, a tubular parallel flue 33, a driver shaft 4, an air duct butterfly valve 5, a flue duct butterfly valve 6, an air duct 2, and a flue 3. At both ends of the device, the parallel axis form of the tubular parallel air duct 23 and the tubular parallel flue duct 33 is changed to a coaxial form, so as to ensure the sequential plugging and fixing of the air duct 2 and the flue duct 3 according to the designed dimensions, and to ensure normal working requirements. The driver 1 is fixed on the outer surface of the tubular parallel flue 33, the driver 1 is equipped with a driver shaft 4, the driver shaft 4 vertically passes through the parallel section of the tubular parallel flue 33 and the tubular parallel air duct 23, and the driver shaft 4 is parallel to the tubular Sealing between the flue 33 and the parallel section of the tubular parallel air duct 23, the driver shaft 4 is fixed with an air duct butterfly valve 5 and a flue flue butterfly valve 6 in the tubular parallel air duct 23 and the tubular parallel flue 33 respectively. The air duct butterfly valve 5 and the flue duct butterfly valve 6 have a coaxial structure, which is synchronously driven by the driver shaft 4. Both the air duct butterfly valve 5 and the flue duct butterfly valve 6 are equipped with silicone edges to ensure the sealing effect. normally closed state.

When the wall-hung boiler is ready to work, the fan starts, and the electrical signal or wind pressure signal closes the switch circuit to supply power to the driver 1, and the driver shaft 4 drives the air duct butterfly valve 5 and the flue butterfly valve 6 to rotate clockwise, thereby opening the butterfly valve for ventilation and smoke exhaust Smoothly, so that the wall-hung boiler works normally. When the wall-hung boiler is turned off, the fan stops working, the electrical signal or wind pressure signal disappears, the switch circuit is disconnected, the driver 1 is powered off, the driver shaft 4 drives the air duct butterfly valve 5 and the flue duct butterfly valve 6 to rotate counterclockwise synchronously, and the air duct butterfly valve 5 and the flue butterfly valve 6 respectively seal the tubular parallel air duct 23 and the tubular parallel flue 33, thereby preventing cold air from intruding into the wall-hung boiler and realizing the purpose of energy saving and heat preservation.

Another preferred mode of the present application is the coaxial form of the air duct and the flue, the flue is inside, and the air duct is outside, as shown in Figure 2 and Figure 4, the mechanical structure shown in Figure 2 and Figure 4 consists of a fixed section 8 (left and right two sections), rotary section 9, driver 10, worm screw 15, worm gear 16, air duct fixed dividing plate 11, flue fixed dividing plate 12, air duct rotating dividing plate 13, flue rotating dividing plate 14 etc. composition. The fixed partition and the rotating partition are arranged in pairs, each of which can be one piece or multiple pieces, the number of pieces is different, the angle of installation is different, and the rotation angle of the rotating section is also different when it is working. The non-contact surface of the partition is equipped with deflector fins. This article explains with four pieces each. The fixed section 8 and the rotating section 9 are coaxial tubes with the tubular parallel air duct 23 outside and the tubular parallel flue 33 inside, and the tubular parallel air duct 23 and the tubular parallel flue 33 are relatively fixed in the same section. The left and right sections of the fixed section 8 are plugged with the rotating section 9 , and the rotating section 9 forms a sandwich structure between the left section and the right section of the fixed section 8 . The driver 10 is respectively fixed on the left and right sections of the fixed section 8 and integrated with the left and right sections of the fixed section 8, and the rotating section 9 can rotate flexibly in the middle. The worm (gear) 15 and the worm tooth (rack) 16 are guaranteed to mesh effectively by the installation dimensions.

Fig. 4 is a cross-sectional view along line A-A of Fig. 2 . Air duct fixed partitions 11 and flue fixed partitions 12 are respectively installed in the fixed section air duct and the fixed section flue; air duct rotating partitions 13 and flue rotating partitions are installed in the rotating section air duct and the rotating section flue 14; There are four fixed dividing plates 11 for the air duct, which are evenly distributed at an angle of 90 degrees. There are four fixed dividing plates 12 for the flue, which are evenly distributed at an angle of 90 degrees. There are four air duct rotating partitions 13, which are evenly distributed at an angle of 90 degrees. There are totally four flue rotating dividing plates 14, which are evenly distributed at an angle of 90 degrees. When installed in place, the rotating section 9 can drive the air duct rotating partition 13 and the flue rotating partition 14 to rotate flexibly and ensure a close fit with the air duct fixed partition 11 and the flue fixed partition 12, thereby ensuring airtight performance. When the tubular parallel air duct and the tubular parallel flue are closed, the fixed partition and the rotating partition overlap slightly. The normal position pipelines of the air duct rotating partition plate 13 and the flue duct rotating partition plate 14 are in a closed state.

When the wall-hung boiler is ready to work, the fan starts, and the electrical signal or wind pressure signal closes the switch circuit to supply power to the driver 10, and the worm (gear) 15 drives the worm tooth (rack) 16 on the rotating section 9 to make the rotating section 9 clockwise Rotate 45 degrees, the air duct rotating partition 13 and the flue rotating partition 14 overlap with the air duct fixed partition 11 and the flue fixed partition 12 respectively, so as to respectively open the tubular parallel air duct 23 and the tubular parallel flue 33, Make the ventilation and smoke exhaust smooth, and the wall-hung boiler can work normally. When the wall-hung boiler is turned off, the fan stops working, the electrical signal or wind pressure signal disappears, the switch circuit is disconnected, the driver 10 is powered off, and the worm (gear) 15 drives the worm tooth (rack) 16 on the rotating section 9 to drive the rotating section 9 Rotate 45 degrees counterclockwise, The air duct rotating partition 13 and the flue rotating partition 14 return with the rotating section 9, respectively sealing the tubular parallel air duct 23 and the tubular parallel flue 33, thereby preventing cold air from intruding into the wall-hung boiler and realizing the purpose of energy saving and heat preservation . Due to the addition of partitions in the tubular parallel air duct and the tubular parallel flue, in order to ensure the normal operation of the wall-hung boiler, the tubular parallel air duct 23 and the tubular parallel flue 33 in this application are appropriately increased in diameter compared with the air duct 2 and the flue 3 Dimensions (such as tubular parallel air duct 23 and tubular parallel flue 33 are appropriately increased in diameter than air duct 2 and flue 3 according to the principle of equal flow), but both ends are plugged with the original air duct 2 and flue 3, so as to Ensure normal installation.

The third preferred mode of the present application is the coaxial mixed control form of the air duct 2 and the flue 3, as shown in Figure 3, the mechanical structure shown in Figure 3 consists of a driver 1 (that is, a butterfly valve driver), a flue butterfly valve 6 , butterfly valve driver shaft 17, air duct sealing plate 18, air duct sealing plate positioning screw 19 (four evenly distributed), air duct sealing plate positioning spring 20 (four evenly distributed), air duct sealing plate driver 21, shift fork 22 and so on. Air duct 2 is outside and flue 3 is inside. The flue butterfly valve 6 and the air duct sealing plate 18 are normally closed. The air duct sealing plate 18 is a square structure with a large round hole in the middle, which can move axially along the flue 3 when it is set on the flue 3. Four holes are evenly distributed at the four corners. The air duct sealing plate positioning screw 19 is respectively pierced by four holes. Pass. Four air duct sealing plate positioning screws 19 pass through the four corners of the air duct sealing plate, and are positioned and installed on the inner side of the top of the wall-hung boiler to guide the air duct sealing plate 18. The four air duct sealing plate positioning springs 20 are respectively set on The sealing plate is positioned on the screw rod 19 to ensure that the air duct sealing plate 18 seals the air duct 2 tightly. The air duct sealing plate driver 21 is fixed on the inner side of the top of the wall-hung boiler. One end of the shift fork 22 is fixed on the air duct sealing plate driver 21, and the other end is hung on the air duct sealing plate 18. When the air duct sealing plate driver 21 is working, it can The fork 22 controls the air duct sealing plate 18 to move axially downward along the flue 3 against the resistance of the air duct sealing plate spring 20 .

An air duct sealing plate 18 is installed at the air inlet of the wall-hung boiler; when the wall-hung boiler is ready to work, the fan starts, and the electrical signal or wind pressure signal closes the switch circuit, supplying power to the driver 1 (butterfly valve driver) and the air duct sealing plate driver 21 , the butterfly valve driver shaft 17 on the driver 1 drives the flue butterfly valve 6 to rotate clockwise by 90 degrees, and connects the wall-hung boiler with the outdoor flue 3 . The air duct sealing plate driver 21 drives the air duct sealing plate 18 to move downward along the axis of the flue 3 through the shift fork 22 to open the air duct 2 so that the wall-hung boiler can work normally. When the wall-hung boiler is turned off, the fan stops working, the electrical signal or wind pressure signal disappears, the switch circuit is disconnected, the driver 1 and the air duct sealing plate driver 21 are powered off, and the butterfly valve driver shaft 17 drives the flue butterfly valve 6 to rotate counterclockwise 90 degrees to return The flue 3 is sealed. The air duct sealing plate driver 21 drives the shift fork 22 to return, and the air duct sealing plate 18 returns under the action of the four air duct sealing plate positioning springs 20, sealing the air duct 2 so as to prevent cold air from entering the wall-hung boiler, realizing The purpose of energy saving and heat preservation.

Claims

An active energy-saving heat preservation device for a wall-hung boiler in the form of coaxial air duct and flue, characterized in that the switch circuit determines whether to supply power to the driver according to the working status of the wall-hung boiler, and the actuator actuator is used to control the opening or closing of the air duct and the flue , in order to realize the function of active energy saving and heat preservation, there are three realization forms: air duct, flue parallel axis control form is provided with the switch circuit, the driver, air duct flue butterfly valve and the driver actuator; air duct, flue The coaxial control form is provided with the switch circuit, the driver, the fixed section air duct, the fixed section flue, the air duct fixed partition, the flue fixed partition, the rotating section air duct, the rotating section flue, and the air duct rotation Partition plate, flue rotating partition and the driver actuator; the air duct and flue mixed control form are provided with the switch circuit, the driver, the flue butterfly valve, the air duct sealing plate and the driver actuator; The drivers used in the above three implementation forms all have the function of automatically returning when power is off, so as to close the function of the air duct and the flue.
According to claim 1, an active energy-saving heat preservation device for a wall-hung boiler in the form of coaxial air duct and flue, characterized in that: in the air duct and flue parallel axis control form, the air duct and the The air duct butterfly valve and the flue duct butterfly valve are respectively provided in the flue duct, and the air duct butterfly valve and the flue duct butterfly valve are synchronously driven by the drive shaft.
According to claim 1, an active energy-saving heat preservation device for a wall-hung boiler in the form of coaxial air ducts and flues, characterized in that: in the coaxial control form of the air ducts and flues, the fixed section of the air duct and The fixed partition of the air duct and the fixed partition of the flue are respectively installed in the flue of the fixed section; The flue rotating partition, the non-contact surface of the fixed partition and the rotating partition is equipped with deflector fins; the left and right sections of the fixed section are plugged with the rotating section, and the rotating section between the left section and the right section; the driver is installed on the shells of the left and right sections of the fixed section, and the rotating section can rotate flexibly in the middle; the driver is equipped with a worm or gear, and the outer surface of the rotating section Equipped with worm teeth or racks, the worm or the gear on the driver is used to drive the worm teeth or the rack on the rotating section to make the rotating section drive the air duct to rotate The plate and the flue rotating partition rotate to realize the opening or closing of the air duct and the flue.
According to claim 1, an active energy-saving heat preservation device for a wall-hung boiler in the form of coaxial air duct and flue, characterized in that: in the mixed control form of the air duct and flue, the flue is equipped with the A flue butterfly valve, the flue butterfly valve is driven by a flue butterfly valve driver; the air duct sealing plate is installed at the air inlet in the wall-hung boiler, and the air duct sealing plate is set on the flue, and can The surface of the flue moves axially, and the air duct sealing plate is prevented from misalignment by four evenly distributed air duct sealing plate positioning screws; the positioning screw is covered with the air duct sealing plate positioning spring , to ensure the sealing of the air duct sealing plate; the air duct sealing plate is equipped with a shift fork; the shift fork The other end is fixed on the driver of the air duct sealing plate; the driver of the air duct sealing plate is fixed on the inner side of the top of the wall-hung boiler, and the opening or closing of the air duct sealing plate is controlled by the shift fork.