CN217236102U

CN217236102U - Sealing device with one-way baffle for preventing downdraft and full-premix condensing furnace

Info

Publication number: CN217236102U
Application number: CN202220410243.2U
Authority: CN
Inventors: 陈永钊; 陶龙礼
Original assignee: Guangzhou Devotion Home Environment Technology Co ltd
Current assignee: Guangzhou Devotion Home Environment Technology Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-08-19
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a sealing device with a one-way baffle plate for preventing downdraft and a full-premix condensing furnace, wherein the sealing device comprises a sealing washer and a one-way baffle plate; the sealing washer is provided with a ventilation cavity; the one-way baffle comprises an overturning part and a wind shielding part, the overturning part is connected with the sealing washer, and the wind shielding part is arranged in the ventilation cavity and can move radially, so that the one-way baffle has a closed state and an open state on the sealing washer. According to the sealing device, the one-way baffle is additionally arranged on the sealing gasket, so that the sealing device has a sealing effect in the connection of the main heat exchanger and the fan, and has the effect of preventing external cold air or smoke from entering the main heat exchanger through the inner pipe of the balanced chimney under a standby or shutdown state, so that the cold air or the smoke is prevented from entering the furnace, and the safety performance of equipment is further improved.

Description

Sealing device with one-way baffle for preventing downdraft and full-premix condensing furnace

Technical Field

The utility model relates to a prevent down draught technical field, concretely relates to take one-way baffle to prevent sealing device and full premix condensing furnace of down draught.

Background

Along with the rapid development of domestic economy, the energy problem is increasingly prominent, and high efficiency, energy conservation and environmental protection are the development directions of global household appliances. The common wall-mounted boiler cannot utilize latent heat in steam due to higher exhaust gas temperature, and simultaneously takes away sensible heat due to higher exhaust gas temperature, so that the heat efficiency is reduced. Compared with a condensing type gas wall-mounted furnace, the full-premixing condensing furnace has higher heat efficiency, can greatly and effectively reduce the smoke discharge temperature, and can reach about 40 ℃ of the smoke discharge temperature.

At present, the operation principle of the fully premixed condensing furnace is as follows: and the gas enters the premixing cavity through the gas control proportional valve, and the air enters the premixing cavity inside the furnace through the outer shaft of the balanced chimney. The gas and the air are mixed in the premixing cavity and then enter the fan, the fan conveys the mixed gas of the gas and the air from the outlet of the fan through the rotation to the main heat exchanger for combustion, high-temperature flue gas is generated after combustion, and heat exchange is completed in the main heat exchanger. The circulating water in the heating channel transfers heat to the indoor, and the smoke is discharged to the outdoor through the inner shaft of the balanced chimney.

Among the above-mentioned conventional art, under standby or the shutdown state, cold air can blow into main heat exchanger's furnace and inside the fan through balanced type chimney inner tube, can cause furnace and fan to have the risk of freezing. When a plurality of machines are connected in parallel or a smoke exhaust pipe uses a common flue, smoke generated by the operation of one furnace can enter a hearth and a fan of the main heat exchanger in the other furnace in a standby or shutdown state, so that the smoke enters the inside of the furnace to cause operation faults, and even the smoke can be leaked indoors from the inside of the furnace to cause carbon monoxide poisoning accidents of personnel.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model discloses one of the purposes provides a take one-way baffle to prevent sealing device of down draught solves above-mentioned traditional problem, and it is through being equipped with the one-way baffle structure, under standby or shut down state, can prevent that outside cold air or flue gas from entering inside the main heat exchanger through balanced type chimney inner tube to inside avoiding getting into the stove, further improve equipment's security performance.

The utility model discloses a second provides an adopt this take one-way baffle to prevent sealing device's of downdraft full premix condensing furnace.

The utility model discloses one of the purpose adopts following technical scheme to realize:

a sealing device with a one-way baffle for preventing downdraft comprises a sealing washer and the one-way baffle connected with the sealing washer; the sealing washer is provided with a ventilation cavity; the one-way baffle comprises an overturning part and a wind shielding part, the overturning part is connected with the sealing washer, and the wind shielding part is arranged in the ventilation cavity and can move radially, so that the one-way baffle is in a closed state and an open state on the sealing washer.

Preferably, the turning part is provided with a first notch and a second notch, and the first notch and the second notch are oppositely arranged.

Preferably, the first notch opening is formed in the front face of the turnover portion and is a rectangular notch, and the second notch opening is formed in the back face of the turnover portion and is an arc-shaped notch.

Preferably, an opening gap is formed between the one-way baffle and the ventilation cavity.

Preferably, the sealing gasket is provided with a sealing projection, which is arranged along the ventilation chamber.

Preferably, the sealing washer is further provided with a plurality of mounting holes, and each mounting hole is arranged on the sealing protrusion.

Preferably, the sealing gasket is further provided with a positioning cavity located in the sealing protrusion, and the positioning cavity is arranged in a square shape.

Preferably, the sealing gasket is further provided with a fixing flange arranged in a direction opposite to the sealing protrusion, and the fixing flange extends downwards along the periphery of the sealing gasket.

Preferably, the sealing washer is further provided with at least two clearance gaps, and the clearance gaps are located outside the sealing protrusion.

The second purpose of the utility model adopts the following technical proposal to realize:

the full-premixing condensing furnace comprises a main heat exchanger, a fan and a premixing cavity, and further comprises a sealing device with a one-way baffle for preventing downdraft, wherein the sealing device is installed between the main heat exchanger and the fan, and when the sealing device is in a closed state, the one-way baffle of the sealing device and an air outlet of the fan are covered in a sealing mode.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a sealing device makes it both have sealed effect in being connected of main heat exchanger and fan through adding one-way baffle on sealed gasket, under standby or shut down state, has again and prevents that outside cold air or flue gas from entering the inside effect of main heat exchanger through balanced type chimney inner tube to inside avoiding getting into the stove, further improve equipment's security performance. Meanwhile, when the furnace runs, the one-way baffle is blown open under the action of the fan, so that the mixed gas is sent into the main heat exchanger, and at the moment, the one-way baffle also plays a role in adjusting the mixed gas, so that the flow rate of the mixed gas is lower, and the function of adjusting the air-fuel ratio is played.

Drawings

Fig. 1 is a perspective view of a sealing device according to a preferred embodiment of the present invention;

FIG. 2 is a top view of the sealing device shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of FIG. 3 at B;

FIG. 5 is a block diagram of the seal shown in FIG. 1 in an open state;

FIG. 6 is an exploded view of the seal assembly of FIG. 1 in combination with a primary heat exchanger, a fan, and a premix chamber.

In the figure: 100. a sealing device; 10. a sealing gasket; 11. a ventilation cavity; 12. sealing the protrusion; 13. mounting holes; 14. a positioning cavity; 15. a fixing flange; 16. avoiding a gap; 20. a one-way baffle; 21. a turning part; 210. a first notching opening; 211. a second notching opening; 22. a wind shield portion; 30. turning the gap open; 200. a primary heat exchanger; 300. a fan.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the description of the present invention, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected to" another element, there are no intervening elements present.

Referring to fig. 1 to 6, in order to install the sealing device 100 of a preferred embodiment of the present invention between the main heat exchanger 200 and the fan 300, the sealing device 100 has a one-way baffle 20 with a down-draft prevention function, so as to achieve better sealing and down-draft prevention functions. Specifically, the sealing device 100 comprises a sealing gasket 10 and a one-way baffle 20 connected with the sealing gasket 10; the sealing washer 10 is provided with a ventilation cavity 11; the one-way baffle 20 comprises an overturning part 21 and a wind shielding part 22, the overturning part 21 is connected with the sealing gasket 10, and the wind shielding part 22 is arranged in the ventilation cavity 11 and can move radially, so that the one-way baffle 20 has a closed state and an open state on the sealing gasket 10.

The sealing washer 10 plays a good role in sealing between the main heat exchanger 200 and the fan 300, meanwhile, when the air conditioner is in a shutdown state, the one-way baffle 20 is in a closed state, the one-way baffle 20 is in plane fit with the air outlet of the fan 300, a good anti-downdraft effect is achieved, and the effect that external cold air or smoke enters the main heat exchanger 200 through the inner pipe of the balanced chimney can be prevented, so that the cold air or the smoke is prevented from entering the interior of the furnace, and the safety performance of the equipment is further improved; when the gas mixing device is in a starting state, the fan 300 is started to blow the wind shielding part 22 of the one-way baffle 20 to open the one-way baffle 20, and the one-way baffle 20 is slightly opened or fully opened according to the wind power of the fan 300, so that the flow rate of the mixed gas is conveniently adjusted, and the mixed gas is more fully mixed.

Referring to fig. 2, the sealing gasket 10 is provided with a sealing protrusion 12, and the sealing protrusion 12 is disposed along the ventilation chamber 11 to have a better sealing function with the installation plane of the main heat exchanger 200. In this embodiment, the sealing gasket 10 is further provided with a plurality of mounting holes 13, and each mounting hole 13 is disposed on the sealing protrusion 12 to be installed in a matching manner. In one embodiment, the sealing gasket 10 is further provided with a positioning cavity 14, a fixing flange 15 and a clearance gap 16, the positioning cavity 14 is located in the sealing protrusion 12 for easy installation, the positioning cavity 14 is substantially square, such as rectangular or square, in other embodiments, the positioning cavity 14 is not limited to the above shape, and may also be circular, trapezoidal, and the like. The fixing flange 15 is disposed opposite to the sealing protrusion 12, and in this embodiment, the fixing flange 15 extends downward along the periphery of the sealing gasket 10, and is configured to be sleeved on the air outlet of the fan 300, so as to facilitate installation and sealing. The number of clearance gaps 16 is at least two, and the clearance gaps are matched with the gaps on the air outlet of the fan 300, and in this embodiment, the clearance gaps 16 are located outside the sealing protrusions 12. As shown in fig. 6, the shape of the ventilation cavity 11 is similar to the shape of the air outlet of the fan 300, and the shape and size of the ventilation cavity 11 are larger than those of the air outlet of the fan 300, so that the one-way baffle 20 can be better attached to the air outlet of the fan 300, and the sealing effect is better.

Referring to fig. 2 to 4, the turning portion 21 is provided with a first notch 210 and a second notch 211, the first notch 210 and the second notch 211 are disposed opposite to each other, so that the turning portion 21 can be easily blown open when the blower 300 is started, and the blower 300 can send air and fuel gas into the burner door. Optionally, an opening gap 30 is provided between the one-way flap 20 and the ventilation cavity 11, so that the wind blocking portion 22 of the one-way flap 20 is more easily blown open.

In another embodiment, the sealing washer 10 and the one-way baffle 20 are integrally formed by a soft material such as silica gel, so that the anti-backflow effect is better.

The sealing device 100 has the sealing function in the connection between the main heat exchanger 200 and the fan 300 by adding the one-way baffle 20 on the sealing washer 10, and has the function of preventing external cold air or smoke from entering the main heat exchanger 200 through the inner pipe of the balanced chimney in the standby or shutdown state, thereby avoiding entering the furnace and further improving the safety performance of the equipment. Meanwhile, when the furnace is in operation, the one-way baffle 20 is blown open by the fan 300, so that the mixed gas is sent into the main heat exchanger 200, and at the moment, the one-way baffle 20 also plays a role in adjusting the mixed gas, so that the flow rate of the mixed gas is lower, and the function of adjusting the air-fuel ratio is played.

Referring to fig. 6 again, the fully premixed condensing furnace according to an embodiment of the present invention includes a main heat exchanger 200, a fan 300, a premixing chamber and the sealing device 100 with the one-way baffle 20 for preventing the backflow of the air, the sealing device 100 is installed between the main heat exchanger 200 and the fan 300, and when the sealing device 100 is in a closed state, the one-way baffle 20 of the sealing device 100 and the air outlet of the fan 300 are covered in a sealing manner. The coverage area of the wind shielding portion 22 of the one-way baffle 20 is slightly larger than the wind outlet area of the wind outlet of the fan 300, so that the sealing effect is better in the shutdown state.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A sealing device with a one-way baffle for preventing downdraft is characterized by comprising a sealing washer and the one-way baffle connected with the sealing washer; the sealing washer is provided with a ventilation cavity; the one-way baffle comprises an overturning part and a wind shielding part, the overturning part is connected with the sealing washer, and the wind shielding part is arranged in the ventilation cavity and can move radially, so that the one-way baffle is in a closed state and an open state on the sealing washer.

2. The sealing device with the one-way baffle for preventing the backflow according to claim 1, wherein a first notch and a second notch are arranged on the overturning part, and the first notch and the second notch are oppositely arranged.

3. The sealing device with the one-way baffle for preventing the backflow according to claim 2, wherein the first notch is arranged on the front surface of the turnover part and is a rectangular notch, and the second notch is arranged on the back surface of the turnover part and is an arc notch.

4. The sealing device with a one-way baffle for preventing backflow according to claim 1, wherein an opening gap is formed between the one-way baffle and the ventilation cavity.

5. The sealing device with the one-way baffle for preventing the backflow is characterized in that the sealing gasket is provided with a sealing bulge, and the sealing bulge is arranged along the ventilation cavity.

6. The sealing device with the one-way baffle for preventing the backflow of the air, as claimed in claim 5, wherein the sealing washer is further provided with a plurality of mounting holes, and each mounting hole is arranged on the sealing protrusion.

7. The sealing device with the one-way baffle for preventing the backflow of the air, as claimed in claim 5, wherein the sealing washer is further provided with a positioning cavity located in the sealing protrusion, and the positioning cavity is arranged in a square shape.

8. The sealing device with the one-way baffle for preventing the backflow of the air, as claimed in claim 5, wherein the sealing washer is further provided with a fixing flange arranged opposite to the direction of the sealing protrusion, and the fixing flange extends downwards along the periphery of the sealing washer.

9. The sealing device with the one-way baffle for preventing the backflow according to claim 5, wherein the sealing washer is further provided with at least two clearance gaps, and the clearance gaps are positioned outside the sealing protrusion.

10. A full-premix condensing furnace comprises a main heat exchanger, a fan and a premix cavity, and is characterized by further comprising the sealing device with the one-way baffle for preventing backflow as claimed in any one of claims 1 to 9, wherein the sealing device is installed between the main heat exchanger and the fan, and when the sealing device is in a closed state, the one-way baffle of the sealing device and an air outlet of the fan are covered in a sealing mode.