A heating and circulating air duct structure for a household wet waste dryer

Abstract

This utility model discloses a heating and circulating air duct structure for a household wet waste dryer, belonging to the field of heating and drying technology. The device provided by this utility model includes a fan, a diffuser, a distributor, a heating air duct, an air outlet duct, a return air duct, and an exhaust gas duct. The fan is fixedly connected to the diffuser; one air outlet of the diffuser is fixedly connected to the distributor, and the other air outlet is fixedly connected to the heating air duct. The distributor is connected to both the heating air duct and the exhaust gas duct. A heater for heating the incoming airflow is installed inside the heating air duct, and the air outlet duct is connected to the other end of the heating air duct. The return air duct is connected to both the air outlet duct and the fan inlet. Through structural optimization and coordination, the entire airflow system is simpler to assemble and coordinate, while reducing the number of internal components and improving system stability and safety. Furthermore, through a reasonable distribution design, the drying effect is improved while reducing system power consumption.

Description

Technical Field

[0001] This utility model belongs to the field of heating and drying technology, specifically relating to a heating and circulating air duct structure for a household wet waste dryer. Background Technology

[0002] Existing household waste dryers mainly employ two heating structures: bottom direct heating with top exhaust, and bottom hot air drying. In the bottom direct heating system, a heating plate at the bottom of the metal inner drum provides the heat source, heating the contents before exhausting the heated air through an exhaust vent at the top. The airflow path typically involves an air inlet on the top cover connecting to the outside, followed by an exhaust fan to maintain a slight negative pressure inside the drum, preventing odors from escaping. The fan is then connected to activated carbon or other fillers for deodorization before being released to the outside. However, in the bottom direct heating system, energy transfer relies solely on heat conduction, and the continuous inflow and outflow of air at the top carries away the heated moisture. This results in significant energy loss and low energy efficiency due to constant airflow carrying away the inner drum's temperature. Furthermore, users risk steam burns if they suddenly open the lid during operation.

[0003] In bottom-heated drying systems, the bottom of the material container is designed to be perforated for ventilation. Hot air is then blown upwards to transfer heat and remove moisture. The airflow path typically involves an air inlet on the outer casing connected to the fan inlet. A PTC (Power Control Unit) is located at the rear of the fan, and its rear end is connected to the bottom of the inner container. The air is blown onto the material through the perforated bottom, and then discharged to the outside via an outlet at the rear of the inner container connected to a stuffing box. However, due to its limited airflow structure, bottom-heated drying systems cannot handle materials with high moisture content (those that release moisture upon heating) or liquid materials, resulting in a narrow application range and limited processing capacity.

[0004] Furthermore, both bottom direct heating with top exhaust and bottom hot air drying methods employ complex internal air duct construction, numerous internal components, and low system reliability. Additionally, neither method features a circulating air duct, resulting in significant internal heat loss. Therefore, there is an urgent need to develop a heating structure for household wet waste dryers that is simpler in internal structure and has a higher energy efficiency ratio. Utility Model Content

[0005] The purpose of this invention is to solve the problem of the complexity of duct construction when using a hot air method for kitchen waste treatment, and to provide a heating and circulating duct structure for a household wet waste dryer.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] This utility model provides a heating and circulating air duct structure for a household wet waste dryer, including a fan, a diffuser, a distributor, a heating air duct, an air outlet duct, a return air duct, and an exhaust gas duct; the air inlet of the fan is fixedly connected to the air inlet of the dryer shell;

[0008] The diffuser includes an air inlet and two air outlets. The air outlet of the fan is fixedly connected to the air inlet of the diffuser. One air outlet of the diffuser is fixedly connected to a distributor, and the other air outlet is fixedly connected to a heating duct. The distributor is connected to one end of the heating duct and the exhaust gas passage, respectively, to divide the airflow into the heating duct and the exhaust gas passage. The exhaust gas passage is equipped with filler for adsorbing odors.

[0009] A heater for heating the incoming airflow is fixedly installed inside the heating duct, and thermal sensors are installed at multiple points at the front and rear ends of the heater.

[0010] The air outlet channel is connected to the other end of the heating air duct, and a material-separating protection plate is fixedly installed inside the air outlet channel to prevent materials from falling into the bottom of the air outlet channel.

[0011] One end of the return air duct is connected to the air outlet duct, and the other end is connected to the air inlet of the fan.

[0012] Preferably, the fan is a centrifugal fan or an axial fan.

[0013] Preferably, the diffuser is designed with a small inlet and a large outlet.

[0014] Preferably, the heater is a PTC heater.

[0015] Preferably, the heater is provided with a protective outer shell.

[0016] Preferably, the protective shell is made of a high-temperature resistant material.

[0017] Preferably, the heater is equipped with a physically tripped temperature control switch.

[0018] Preferably, the material separator protection plate is provided with an air distribution mesh plate on the side near the inner drum of the dryer, and the air distribution mesh plate adopts a surface protrusion design.

[0019] Preferably, the exhaust gas passage is provided with a packing bin for holding packing material, and a locking mechanism is detachably installed at the bottom of the packing bin.

[0020] Preferably, the filler includes activated carbon, a desiccant, and a catalyst.

[0021] Compared with the prior art, this utility model has the following advantages:

[0022] This invention provides a heating circulation duct structure for a household wet waste dryer, aiming to solve the problem of complex duct construction when using air-heating methods in waste treatment. Through optimized structural design and reasonable configuration, the construction process of the entire airflow system is simplified, while reducing the number of internal components. This lowers the risk of burns due to user error during operation interruptions, improving system stability and safety. The circulating airflow design of this invention not only improves drying efficiency but also reduces system power consumption, increases energy efficiency ratio, reduces energy loss, and enhances environmental and energy-saving performance. Furthermore, the side-exit design of this invention allows the duct to accommodate more material types, expanding the range of applicable materials. Attached Figure Description

[0023] Figure 1 A schematic diagram of the heating and circulating air duct structure of the household wet waste dryer provided by this utility model;

[0024] Figure 2 Cross-sectional view of the heating and circulating air duct structure of the household wet waste dryer provided by this utility model;

[0025] Figure 3 Top view of the heating and circulating air duct structure of the household wet waste dryer provided by this utility model;

[0026] In the diagram: 1. Fan, 2. Diffuser, 3. Diverter, 4. Heating duct, 4.1. Heater, 4.2. Protective housing, 4.3. Thermal sensor, 4.4. Temperature control switch, 5. Outlet duct, 5.1. Material separation protection plate, 6. Return air duct, 7. Exhaust gas duct. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0028] In the description of the specific embodiments of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal communication between two components, or direct connection. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may change. Furthermore, the accompanying drawings of the embodiments disclosed in this utility model only involve structures mentioned in the embodiments of this disclosure; other structures can refer to common designs. Where there is no conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0029] like Figure 1 and Figure 2 As shown, as a preferred embodiment of this utility model, this embodiment provides a heating circulation duct structure for a household wet waste dryer, including a fan 1, a diffuser 2, a distributor 3, a heating duct 4, an air outlet duct 5, a return air duct 6, and an exhaust gas duct 7. The air inlet of the fan 1 is fixedly connected to the air inlet of the dryer shell. The diffuser 2 includes one air inlet and two air outlets, and the air outlet of the fan 1 is fixedly connected to the air inlet of the diffuser 2. In this embodiment, the fan 1 can be a centrifugal fan or an axial fan; in other embodiments, other types of fans can be used according to actual conditions. One air outlet of the diffuser 2 is fixedly connected to the distributor 3, and the other air outlet is fixedly connected to the heating duct 4. The diffuser 2 can expand the cross-sectional area of ​​the fan outlet. In this embodiment, the diffuser 2 adopts a small inlet and large outlet design, which can effectively reduce the gas velocity in the diffuser 2, reduce the pressure on the internal components of the distributor 3 and the heating duct 4, and extend the service life of the internal components of the distributor 3 and the heating duct 4.

[0030] In this embodiment, the heating duct 4 is equipped with a heater 4.1, a protective shell 4.2, a thermal sensor 4.3, and a temperature control switch 4.4. The heater 4.1 heats the airflow blown in by the fan 1, providing a heat source for the entire machine. In this embodiment, the heater 4.1 is a PTC heater, which has the advantages of low thermal resistance and high heat exchange efficiency. It is an automatic temperature-controlled and energy-saving heater, preventing the material barrel temperature from becoming too high due to continuous temperature increases during heating. The heater 4.1 is nested within the protective shell 4.2. In this embodiment, the protective shell 4.2 is made of high-temperature resistant material to prevent damage to the heating duct 4 due to excessively high heater 4.1 temperature. Thermal sensors 4.3 are installed at multiple points at the front and rear ends of the heater 4.1. By monitoring the air temperature before and after heating, the temperature inside the material barrel of the dryer can be estimated, facilitating temperature control. The heater 4.1 is electrically connected to a physically tripped temperature control switch 4.4, which is in close contact with the heater 4.1. In this embodiment, the temperature control switch 4.4 can be a snap-action temperature control switch. When the dryer is running, if the thermal sensor 4.3 fails, the circuit connection can be disconnected through the temperature control switch 4.4, thereby achieving effective physical safety protection and preventing damage to other structures or other safety hazards caused by thermal runaway of the heater 4.1 in the event of thermal runaway of the heater 4.1 due to the failure of the thermal sensor 4.3. The heater 4.1, protective shell 4.2, thermal sensor 4.3 and temperature control switch 4.4 work together to maximize air heating efficiency while improving safety and preventing damage to other components from high temperatures.

[0031] In this embodiment, the diverter 3 is connected to one end of the heating duct 4 and the exhaust gas channel 7, respectively. The diverter 3 physically divides the airflow, sending most of the medium into the heating duct 4 and a small portion into the exhaust gas channel 7. The exhaust gas channel 7 is equipped with a packing chamber for holding the packing material. The packing chamber is vertically positioned within the exhaust gas channel 7, and a locking mechanism is located at the bottom of the packing chamber. This locking mechanism is primarily used to prevent the packing material from falling to the bottom of the exhaust gas channel 7 and entering the exhaust gas diverter 3 or other parts, thus preventing malfunction of the entire device. The locking mechanism and the packing chamber are detachable, facilitating the replacement of the internal packing material by the user. The packing material contained in the packing chamber mainly consists of activated carbon, desiccant, and catalyst, and is primarily used to adsorb odors generated after circulation. In this embodiment, the packing material used can be used in conjunction with ozone for exhaust gas treatment. Ozone can effectively oxidize and decompose odor sources such as VOCs, ammonia, and hydrogen sulfide. After adsorption reactions by activated carbon, desiccant, and catalyst, odorless or low-odor emissions can be achieved.

[0032] In this embodiment, the air outlet duct 5 is connected to the other end of the heating air duct 4, such as... Figure 3As shown, the air outlet channel 5 is equipped with a material-separating protection plate 5.1 inside. This plate serves as a protective measure for the airflow, preventing material from falling into the bottom of the air outlet channel 5 and affecting the operation of the entire equipment. A perforated air distribution plate is located on the side of the material-separating protection plate 5.1 near the inner drum of the dryer. This plate changes the airflow direction, allowing it to more effectively reach the material at the bottom of the dryer's inner drum. It also features a surface bump design to reduce material adhesion and intrusion. The material-separating protection plate 5.1 and the perforated air distribution plate work together to discharge material from inside the air outlet channel 5. The air outlet at the top of the air outlet channel 5 connects to one end of the return air channel 6, and the other end of the return air channel 6 connects to the air inlet of the fan 1. The return air channel 6 is composed of the shell structure of the entire dryer. After the hot airflow from the heating circulation duct structure exits through the air outlet channel 5, it can return to the air inlet of the fan 1 through the return air channel 6, achieving heat reuse and reducing overall energy loss.

[0033] In the heating circulation duct structure provided by this utility model, air is discharged from the fan 1, passes through the diffuser 2 and the distributor 3, and most of the airflow enters the heating duct 4. The airflow is heated by the heater 4.1, and the heated airflow is sent into the outlet duct 5. After the heated airflow is evenly distributed and guided by the material isolation protection plate 5.1 and the air distribution mesh plate inside the outlet duct 5, the hot airflow is blown onto the material in the inner barrel of the dryer to heat the material and remove moisture. The gas with high moisture content re-enters the air inlet of the fan 1 through the return air duct 6 at the top, and is pressurized and accelerated by the fan 1 before entering the next cycle. During the circulation process, a small portion of the saturated water vapor diverted by the distributor 3 is absorbed and deodorized by the packing in the exhaust gas duct 7 and discharged outside the dryer. The device provided by this utility model eliminates the traditional exhaust gas fan and distributor structure, advances the distributor structure, reduces the overall structural complexity, and the heater 4.1 has multiple protection measures to ensure safe operation even in the event of monitoring failure, without creating additional safety hazards.

[0034] The embodiments described above are merely preferred solutions of this utility model, and are not intended to limit the scope of this utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this utility model. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A heating circulating air duct structure for a household wet garbage dryer, characterized by, It includes a fan (1), a diffuser (2), a distributor (3), a heating air duct (4), an air outlet duct (5), a return air duct (6), and an exhaust gas duct (7); the air inlet of the fan (1) is fixedly connected to the air inlet of the dryer shell; The diffuser (2) includes an air inlet and two air outlets. The air outlet of the fan (1) is fixedly connected to the air inlet of the diffuser (2). One air outlet of the diffuser (2) is fixedly connected to the splitter (3), and the other air outlet is fixedly connected to the heating duct (4). The splitter (3) is connected to one end of the heating duct (4) and the exhaust gas channel (7) respectively, and is used to divide the airflow into the heating duct (4) and the exhaust gas channel (7). The exhaust gas channel (7) is provided with filler for adsorbing odors. The heating air duct (4) is fixedly equipped with a heater (4.1) for heating the incoming airflow, and a heat sensor (4.3) is provided at multiple points at the front and rear ends of the heater (4.1). The air outlet channel (5) is connected to the other end of the heating air duct (4), and a material isolation protection plate (5.1) is fixedly installed inside the air outlet channel (5) to prevent materials from falling into the bottom of the air outlet channel (5); One end of the return air duct (6) is connected to the air outlet duct (5), and the other end is connected to the air inlet of the fan (1).

2. The household wet garbage dryer heating circulating air duct structure according to claim 1, characterized in that, The fan (1) is a centrifugal fan or an axial fan.

3. The household wet garbage dryer heating circulating air duct structure according to claim 1, characterized in that, The diffuser (2) is designed with a small inlet and a large outlet.

4. The household wet garbage dryer heating circulating air duct structure according to claim 1, characterized in that, The heater (4.1) is a PTC heater.

5. The household wet garbage dryer heating circulating air duct structure according to claim 1, characterized in that, The heater (4.1) is provided with a protective shell (4.2) on its outer periphery.

6. The household wet garbage dryer heating circulating air duct structure according to claim 5, characterized in that, The protective shell (4.2) is made of high-temperature resistant material.

7. The household wet garbage dryer heating circulating air duct structure according to claim 1, characterized in that, The heater (4.1) is equipped with a physically tripped temperature control switch (4.4).

8. The household wet garbage dryer heating circulating air duct structure according to claim 1, characterized in that, The material separation protection plate (5.1) is provided with an air distribution mesh plate on the side near the inner barrel of the dryer. The air distribution mesh plate adopts a surface protrusion design.

9. The household wet garbage dryer heating circulating air duct structure according to claim 1, characterized in that, The exhaust gas passage (7) is provided with a packing bin for holding packing material, and a locking mechanism is detachably installed at the bottom of the packing bin.

10. The household wet garbage dryer heating circulating air duct structure according to claim 1, characterized in that, The filler includes activated carbon, a water absorbent, and a catalyst.

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