Combustion chamber structure and gas clothes dryer

Abstract

The application discloses a combustion chamber structure and a gas clothes dryer, and belongs to the technical field of clothes treatment equipment. The combustion chamber structure comprises a shell, a combustion chamber body, a burner and an air adjusting plate. The shell is provided with an air inlet and an air outlet, and an air guide channel is formed between the air inlet and the air outlet in the shell. The combustion chamber body is arranged in the air guide channel and close to the air inlet. The combustion chamber body is provided with an air inlet and an air outlet which are communicated with the air guide channel. The burner is arranged in the combustion chamber body. The air adjusting plate is arranged outside the combustion chamber body and covers the air inlet. An air inlet gap which is communicated with the air inlet is defined between the air adjusting plate and the combustion chamber body. The gas clothes dryer comprises an inner drum and the above-mentioned combustion chamber structure. The air outlet is communicated with the inner drum. The air adjusting plate changes the air inlet direction of the combustion chamber body, buffers the air inlet airflow, ensures that the burner burns at a high stable temperature, and ensures that the combustion is sufficient.

Description

Technical Field

[0001] This invention relates to the field of clothing processing equipment technology, and in particular to a combustion chamber structure and a gas-fired clothes dryer. Background Technology

[0002] Gas dryers use the heat generated by burning gas to dry clothes, offering advantages such as convenience, speed, economy, hygiene, environmental friendliness, and leaving clothes fluffy and soft. The combustion chamber structure of a current gas dryer includes an outer shell with an air inlet and an air outlet. Inside the outer shell is the burner. Air enters the outer shell through the air inlet and flows through the air outlet into the inner drum of the dryer to dry the clothes.

[0003] The temperature provided by the combustion chamber is the main factor determining the drying efficiency. Combustion requires sufficient temperature to initiate and maintain the reaction. Higher temperatures will accelerate the combustion speed and efficiency. In order for the gas to continue burning and form a complete flame, the flame itself must be kept at a fairly high temperature.

[0004] In most gas dryers, the air entering through the air inlet flows directly towards the burner. The airflow temperature is relatively low, and when it comes into contact with the flame, the flame temperature drops, resulting in incomplete combustion and low effective utilization of calorific value. Furthermore, the incomplete combustion leads to uneven temperature distribution at different locations within the drum, affecting drying efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a combustion chamber structure and a gas dryer to solve the technical problem of incomplete combustion in the prior art.

[0006] Based on the above concept, the technical solution adopted by this invention is as follows:

[0007] A combustion chamber structure, comprising:

[0008] The outer casing has an air inlet and an air outlet, and an air guide channel is formed inside the outer casing between the air inlet and the air outlet;

[0009] The combustion chamber body is disposed within the air guide channel and close to the air inlet, and the combustion chamber body has an air inlet and an air outlet communicating with the air guide channel;

[0010] The burner is disposed within the combustion chamber body;

[0011] An air deflector is disposed outside the combustion chamber body and blocks the air inlet. An air intake gap is defined between the air deflector and the combustion chamber body, which communicates with the air inlet.

[0012] As a preferred embodiment of the combustion chamber structure, the edge of the air regulating plate is provided with a baffle extending toward the air intake.

[0013] As a preferred embodiment of the combustion chamber structure, the air intake slit is arranged in a ring around the air intake, or the air intake slit is arranged in a long strip shape on opposite sides of the air intake.

[0014] As a preferred embodiment of the combustion chamber structure, the air regulating plate is detachably connected to the outer shell or the combustion chamber body, and the size of the air inlet gap is adjustable.

[0015] As a preferred embodiment of the combustion chamber structure, an air intake section is formed inside the combustion chamber body between the burner and the air inlet, and the gas flow area of ​​the air intake section gradually increases along the direction from the air inlet to the burner.

[0016] As a preferred embodiment of the combustion chamber structure, an outlet section is formed inside the combustion chamber body between the burner and the outlet, and the gas flow area of ​​the outlet section is uniform and constant along the direction from the burner to the outlet.

[0017] As a preferred embodiment of the combustion chamber structure, along the gas flow direction, the air guide channel forms a bent air guide path downstream of the gas outlet, and the air guide path undergoes at least two bends.

[0018] As a preferred embodiment of the combustion chamber structure, the air guide path is S-shaped.

[0019] As a preferred embodiment of the combustion chamber structure, at least three reflectors are spaced apart along the gas flow direction in the air guide channel. Each of the reflectors is staggered on two opposite side walls of the air guide channel. The reflectors guide the gas to flow towards the center of the air guide channel and towards the air outlet.

[0020] A gas-fired clothes dryer includes an inner drum and a combustion chamber structure as described above, wherein the air outlet is connected to the inner drum.

[0021] The beneficial effects of this invention are:

[0022] The combustion chamber structure proposed in this invention allows outside air to enter the air guide channel of the outer shell through the air inlet, and then enter the combustion chamber body through the air inlet. Because the air regulating plate blocks the air inlet and defines an air intake gap between itself and the combustion chamber body, air enters the combustion chamber body through this gap. The air regulating plate alters the air intake direction of the combustion chamber body, buffering the airflow and preventing it from impacting the burner. This ensures the burner maintains a high and stable combustion temperature, guaranteeing complete combustion. Furthermore, the air regulating plate prevents heat loss from within the combustion chamber body. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the combustion chamber structure provided in the embodiment of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the combustion chamber structure provided in the embodiment of the present invention. Figure 2 ;

[0025] Figure 3 This is a partial structural diagram of the combustion chamber structure provided in the embodiment of the present invention. Figure 1 ;

[0026] Figure 4 This is a partial structural diagram of the combustion chamber structure provided in an embodiment of the present invention. Figure 2 ;

[0027] Figure 5 This is a partial front view of the combustion chamber structure provided in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the combustion chamber structure provided in an embodiment of the present invention, omitting the outer shell. Figure 1 ;

[0029] Figure 7 This is a schematic diagram of the combustion chamber structure provided in an embodiment of the present invention, omitting the outer shell. Figure 2 .

[0030] In the picture:

[0031] 10. Outer casing; 101. Air inlet; 102. Air outlet;

[0032] 20. Combustion chamber body; 201. Air inlet; 202. Air outlet; 21. First baffle; 22. Second baffle;

[0033] 30. Burner;

[0034] 40. Air regulating plate; 401. Air inlet gap; 41. Edge retainer;

[0035] 51. First reflector; 52. Second reflector; 521. First inclined portion; 522. First parallel portion; 53. Third reflector; 531. Second inclined portion; 532. Second parallel portion; 54. First opening; 55. Second opening. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] See Figures 1 to 7 This invention provides a combustion chamber structure, including an outer shell 10, a combustion chamber body 20, a burner 30, and an air regulating plate 40. The outer shell 10 has an air inlet 101 and an air outlet 102, and an air guide channel is formed inside the outer shell 10 between the air inlet 101 and the air outlet 102. The combustion chamber body 20 is disposed in the air guide channel and close to the air inlet 101. The combustion chamber body 20 has an air inlet 201 and an air outlet 202 communicating with the air guide channel. The burner 30 is disposed inside the combustion chamber body 20. The air regulating plate 40 is disposed outside the combustion chamber body 20 and blocks the air inlet 201. An air inlet gap 401 communicating with the air inlet 201 is defined between the air regulating plate 40 and the combustion chamber body 20.

[0041] During operation, outside air enters the air guide channel of the outer casing 10 through the air inlet 101, and then enters the combustion chamber body 20 through the air inlet 201. Because the air regulating plate 40 blocks the air inlet 201 and defines an air intake gap 401 connecting it to the combustion chamber body 201, air enters the combustion chamber body 20 through the air intake gap 401. The air regulating plate 40 changes the air intake direction of the combustion chamber body 20, buffering the airflow and preventing direct impact on the burner 30. This ensures that the burner 30 burns at a higher, stable temperature, guaranteeing complete combustion. Furthermore, the air regulating plate 40 prevents heat loss from the combustion chamber body 20.

[0042] Typically, the air inlet 101 is located at the bottom of the outer casing 10, and the air outlet 102 is located on the side of the outer casing 10, taking full advantage of the principle of hot air rising to guide the hot air upward. The air deflector 40 is located between the air inlet 101 of the outer casing 10 and the air inlet 201 of the combustion chamber body 20, and plays a guiding role in the air entering the combustion chamber body 20.

[0043] The air inlet gap 401 is arranged in a ring around the air inlet 201, or the air inlet gap 401 is arranged in a long strip on opposite sides of the air inlet 201. In this embodiment, the air inlet 201 is rectangular, so the air inlet gap 401 is arranged in a long strip on opposite sides of the air inlet 201 to facilitate the installation of the air regulating plate 40. Specifically, both ends of the air regulating plate 40 are connected to the outer casing 10, and the two sides of the air regulating plate 40 form a long strip air inlet gap 401 between the air regulating plate 40 and the air inlet 201.

[0044] In other embodiments, the air inlet gap 401 can be arranged in a ring around the air inlet 201. The air inlet 201 can be circular, square or elliptical, and the shape of the air regulating plate 40 can be set according to the shape of the air inlet 201.

[0045] The edge of the air regulating plate 40 is provided with a baffle 41 extending toward the air inlet 201. The baffle 41 is provided to prevent the edge of the air regulating plate 40 from being sharp, and to block the airflow into the air inlet 201.

[0046] In some embodiments, the baffle 41 can be detachably connected to the air regulating plate 40. By replacing the baffle 41 with different sizes, the size of the air inlet gap 401 can be changed, and the size of the air inlet gap 401 can be adjusted without disassembling the air regulating plate 40.

[0047] In this embodiment, the air regulating plate 40 is detachably connected to the outer casing 10 or the combustion chamber body 20, and the size of the air intake gap 401 is adjustable. The closer the air regulating plate 40 is to the air intake port 201, the smaller the air intake gap 401 is.

[0048] It is understood that the burner 30 is connected to the gas source via a gas passage, and a gas valve is connected to the gas passage to open or close it. The working principle of the burner 30 will not be elaborated here; a conventional burner 30 will be used. The combustion chamber body 20, where the burner 30 is located, needs to be supplied with air to ensure normal vortex circulation within the combustion chamber body 20. In this embodiment, two burners 30 can be provided.

[0049] Due to the placement of the air deflector 40, turbulence is created when cold air enters the combustion chamber body 20. In this turbulent state, heat flows in vortices and eddies within the combustion chamber body 20, resulting in a relatively larger effective heat transfer area. In contrast, in laminar flow, the heat flow is more orderly, and the heat transfer area is relatively smaller. Therefore, turbulent heat transfer has a larger effective heat transfer area, allowing for more efficient utilization of the heat transfer interface. Consequently, the heat release coefficient is higher in turbulent flow than in laminar flow, and the heat transfer effect of turbulent flow is better.

[0050] An intake section is formed inside the combustion chamber body 20 between the burner 30 and the air inlet 201. Along the direction from the air inlet 201 to the burner 30, the gas flow area of ​​the intake section gradually increases. This change in the cross-sectional area of ​​the intake section causes the gas to be reflected towards the burner 30, forming vortices, allowing the gas to fully contact the burner 30. This change in the cross-sectional area of ​​the intake section, combined with the guidance of the airflow by the air regulating plate 40, further enhances the turbulence, placing vortices and eddies around the burner 30. This facilitates full contact between the air and the burner 30, improving heat exchange efficiency and ensuring complete combustion.

[0051] In this embodiment, an outlet section is formed inside the combustion chamber body 20 between the burner 30 and the outlet 202. The gas flow area of ​​the outlet section remains uniform along the direction from the burner 30 to the outlet 202. After being heated by the burner 30, the hot air flows smoothly from the outlet section to the air guide channel. In other embodiments, the gas flow area of ​​the outlet section gradually increases along the direction from the burner 30 to the outlet 202. After being heated by the burner 30, the change in the cross-sectional area of ​​the outlet section causes the gas to be reflected and flow into the air guide channel, allowing the hot air to flow smoothly from the outlet section to the air guide channel.

[0052] Specifically, the combustion chamber body 20 is surrounded by a number of baffles, at least one of which extends inward at its bottom, forming an intake section with a gradually increasing gas flow area along the direction from the air inlet 201 to the burner 30. In this embodiment, the combustion chamber body 20 is surrounded by four baffles, including two opposing first baffles 21. The bottoms of both first baffles 21 extend inward at their bottoms so that the bottoms of the two first baffles 21 are close to each other. The bending angle of the first baffles 21 can be 130°-140°.

[0053] The combustion chamber body 20 also includes two second baffles 22 disposed opposite to each other, the two second baffles 22 being arranged in parallel. Of course, in some embodiments, the bottoms of the two second baffles 22 may also extend inward at an inward angle.

[0054] The combustion chamber body 20 is located inside the air guide channel and close to the air inlet 101. Downstream of the combustion chamber body 20, the air guide channel also has a certain length to facilitate the flow of hot air formed after passing through the combustion chamber body 20.

[0055] In some embodiments, the outer wall of the combustion chamber body 20 and the inner wall of the air guide channel are sealed together, so that all the air entering through the air inlet 101 enters the combustion chamber body 20 through the air inlet 201. In this embodiment, in order to ensure sufficient airflow, the outer wall of the combustion chamber body 20 and the inner wall of the air guide channel are spaced apart, allowing a small portion of the air to flow through the air guide channel across the outer surface of the combustion chamber body 20, exchange heat with the outer surface of the combustion chamber body 20, and exchange heat with the hot air flowing out of the combustion chamber body 20 downstream. However, the vast majority of the air still flows in through the air inlet 201 of the combustion chamber body 20, passes through the burner 30, and flows out through the air outlet 202 into the air guide channel.

[0056] Along the gas flow direction, the air guide channel forms a tortuous air guide path downstream of the air outlet 202, with the air guide path undergoing at least two bends. This causes turbulence in the hot air within the air guide channel. Under turbulent conditions, heat flows in vortices and eddies within the air guide channel, thereby relatively increasing the effective heat transfer area of ​​the flow region.

[0057] Outside air enters the air guide channel of the outer casing 10 through the air inlet 101. Some air flows over the outer surface of the combustion chamber body 20, exchanging heat with the combustion chamber body 20 to form hot air. Other air enters the combustion chamber body 20 through the air inlet 201, making full contact with the burner 30 to form hot air, which flows out through the air outlet 202. Downstream of the air outlet 202, the hot air in the air guide channel converges and flows along the tortuous air guide path, forming vortices and eddies, ensuring sufficient contact and heat transfer, resulting in a uniform outlet air temperature at the air outlet 102. Because the air guide path bends at least twice, there are at least two vortex regions, ensuring sufficient heat exchange and a more uniform temperature.

[0058] At least three reflectors are spaced apart along the gas flow direction within the air guide channel. These reflectors are staggered on opposite side walls of the channel, guiding the gas flow towards the center and outlet 102. Because the reflectors guide the hot air, it flows towards the center of the air guide channel, concentrating the heat and ensuring that almost all the hot air flows into the air guide channel from outlet 202, thus improving calorific value utilization.

[0059] In this embodiment, the air guide path is S-shaped, extending the gas flow path and allowing for full gas contact. In other embodiments, the air guide path can be W-shaped, wavy, Z-shaped, or other shapes.

[0060] Specifically, three reflectors are spaced apart along the gas flow direction within the air guide channel: a first reflector 51, a second reflector 52, and a third reflector 53. The first and third reflectors 51 and 53 are connected to one inner wall of the air guide channel and inclined towards the air outlet 102. The second reflector 52 is connected to the other inner wall of the air guide channel and inserted between the first and third reflectors 51 and 53. The first, second, and third reflectors 51 and 53 form a bent air guide path, which undergoes at least two bends.

[0061] A first passage 54 is formed between the end of the first reflector 51 and the plate body of the second reflector 52, allowing airflow to pass through. A second passage 55 is formed between the end of the second reflector 52 and the plate body of the third reflector 53, allowing airflow to pass through. During the flow process, the airflow passes through the first passage 54 and the second passage 55 in sequence, realizing flow along a tortuous path.

[0062] Specifically, the hot air coming out of the outlet 202 of the combustion chamber body 20 flows along the first reflector 51 to the second reflector 52 and is reflected by the second reflector 52 to form a vortex. The hot air passing through the first passage 54 flows along the second reflector 52 to the third reflector 53 and is reflected by the third reflector 53 to form a vortex. Therefore, a vortex zone is formed in the area enclosed by the combustion chamber body 20, the first reflector 51 and the second reflector 52, and another vortex zone is formed in the area enclosed by the first reflector 51, the second reflector 52 and the third reflector 53. The two vortex zones make the gas fully mixed and the temperature more uniform.

[0063] In this embodiment, the first reflector 51 is a flat plate, located above the air outlet 202. One end of the first reflector 51 is connected to the inner wall of one side of the air guide channel, and the other end of the first reflector 51 extends obliquely away from the air outlet 202.

[0064] The second reflector 52 is a bent plate, comprising a first inclined portion 521 and a first parallel portion 522. One end of the first inclined portion 521 is connected to the inner wall of the other side of the air guide channel, and the other end of the first inclined portion 521 extends inclinedly away from the air outlet 202. The first parallel portion 522 is located at the end of the first inclined portion 521 away from the air outlet 202 and extends parallel to the air outlet 102. That is, the first inclined portion 521 is inclined relative to the air outlet 202, and the first parallel portion 522 is parallel to the air outlet 102. The arrangement of the first parallel portion 522 makes the second reflector 52 closer to the third reflector 53, extending the airflow path. The second passage 55 between the second reflector 52 and the third reflector 53 is smaller, which accelerates the gas flow.

[0065] The third reflector 53 is a bent plate, comprising a second inclined portion 531 and a second parallel portion 532. One end of the second inclined portion 531 is connected to the inner wall of one side of the air guide channel, and the other end of the second inclined portion 531 is inclined away from the air outlet 202. The second parallel portion 532 is located at the end of the second inclined portion 531 away from the air outlet 202 and is parallel to the air outlet 102's airflow direction. In other words, the second inclined portion 531 is inclined relative to the air outlet 202's airflow direction, and the second parallel portion 532 is parallel to the air outlet 102's airflow direction. By setting the third reflector 53 as a bent plate, its bending position guides and accelerates the airflow, allowing the airflow to quickly reach the air outlet 102.

[0066] In this embodiment, the combustion chamber body 20 and the air regulating plate 40 can be made of stainless steel or carbon steel with a thickness of 1 mm. The first reflector 51, the second reflector 52 and the third reflector 53 are made of copper or copper-aluminum alloy with a high equivalent thermal conductivity and a thickness of 1 mm.

[0067] In this embodiment, the outer casing 10 includes a front panel, a rear panel, and a side panel, with the front panel and rear panel spaced apart, and the side panel disposed between the front panel and the rear panel. The side panel can be made of stainless steel or carbon steel with a low equivalent thermal conductivity, and has a thickness of 1mm for better temperature retention. The front panel can be made of hot-dip galvanized steel with a thickness of 1mm.

[0068] This invention also provides a gas-fired clothes dryer, including an inner drum and the aforementioned combustion chamber structure, with the air outlet 102 connected to the inner drum. During drying, the fan inside the gas-fired clothes dryer is turned on, creating a negative pressure in the air guide channel. External airflow enters the air guide channel from the air inlet 101, passes through the air inlet gap 401, and enters the combustion chamber body 20. Due to the setting of the air regulating plate 40, the air intake direction of the combustion chamber body 20 is changed. Combined with the gradual increase in the gas flow area along the direction from the air inlet 201 to the burner 30, the gas forms a vortex in the combustion chamber body 20, allowing the gas to fully contact the burner 30. After being heated by the burner 30, the hot air flows from the air outlet 202 to the air guide channel. Through the tortuous air guide path in the air guide channel, the hot air is fully mixed and flows into the inner drum at a stable temperature from the air outlet 102.

[0069] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combustion chamber structure, characterized in that, include: The outer casing (10) has an air inlet (101) and an air outlet (102), and an air guide channel is formed inside the outer casing (10) between the air inlet (101) and the air outlet (102); The combustion chamber body (20) is disposed in the air guide channel and close to the air inlet (101). The combustion chamber body (20) has an air inlet (201) and an air outlet (202) that are connected to the air guide channel. A burner (30) is disposed within the combustion chamber body (20); An air deflector (40) is disposed outside the combustion chamber body (20) and blocks the air inlet (201). An air intake gap (401) is defined between the air deflector (40) and the combustion chamber body (20) to communicate with the air inlet (201). The edge of the air regulating plate (40) is provided with a baffle (41) extending toward the air inlet (201), and the baffle (41) is detachably connected to the air regulating plate (40).

2. The combustion chamber structure according to claim 1, characterized in that, The air inlet gap (401) is arranged in a ring around the air inlet (201), or the air inlet gap (401) is arranged in a long strip on opposite sides of the air inlet (201).

3. The combustion chamber structure according to claim 1, characterized in that, An air intake section is formed inside the combustion chamber body (20) between the burner (30) and the air inlet (201). The gas flow area of ​​the air intake section gradually increases along the direction from the air inlet (201) to the burner (30).

4. The combustion chamber structure according to claim 3, characterized in that, The combustion chamber body (20) forms an outlet section between the burner (30) and the outlet (202). The gas flow area of ​​the outlet section is uniform and constant along the direction from the burner (30) to the outlet (202).

5. The combustion chamber structure according to any one of claims 1-4, characterized in that, Along the gas flow direction, a bent air guide path is formed in the air guide channel downstream of the air outlet (202), and the air guide path undergoes at least two bends.

6. The combustion chamber structure according to claim 5, characterized in that, The air guiding path is S-shaped.

7. The combustion chamber structure according to claim 5, characterized in that, At least three reflectors are spaced apart in the air guide channel along the gas flow direction. Each reflector is staggered on two opposite side walls of the air guide channel. The reflectors guide the gas to flow towards the middle of the air guide channel and towards the air outlet (102).

8. A gas-fired clothes dryer, characterized in that, It includes an inner cylinder and a combustion chamber structure as described in any one of claims 1-7, wherein the air outlet (102) is in communication with the inner cylinder.

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