Room type dryer

Abstract

The invention discloses a room type drying machine which comprises an outer bin, an inner bin and an outer bin. The drying inner bin is provided with a drying cavity and an air inlet cavity, a feeding port is formed in the top of the drying cavity, and an air inlet is formed in the bottom of the air inlet cavity; the drying inner bin is arranged in the containing cavity, and the peripheral wall of the drying inner bin and the peripheral wall of the containing cavity are arranged at intervals to form an outer cavity. The bottom wall of the drying inner bin and the bottom wall of the containing cavity are arranged at intervals to form an air inlet bottom cavity. The hot blast stove is provided with an air inlet pipe and an air outlet pipe, the air inlet pipe is connected with the outer cavity, and the air outlet pipe is connected with the air inlet bottom cavity; and the first fan is used for blowing air towards the air inlet. Waste heat directly lost in traditional equipment is effectively recycled, energy waste is reduced, and the energy consumption cost of drying operation is reduced. Hot air circulation is achieved through the outer cavity, the air inlet bottom cavity, the air inlet cavity and the drying cavity, the energy utilization efficiency is improved, the energy consumption cost is reduced, meanwhile, the drying effect is effectively optimized, and the operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of grain drying machinery technology, and in particular, to a chamber-type dryer. Background Technology

[0002] In the field of grain processing and storage, drying is a core and crucial process connecting harvesting and storage, directly determining the subsequent storage stability and quality grade of the grain. Freshly harvested grains (such as wheat, rice, and corn) typically contain high moisture content. If stored directly, they are highly susceptible to mold and sprouting under the influence of microorganisms, resulting in significant grain losses and reducing the processed quality and commercial value of the grain. Therefore, efficiently drying grains to a safe storage standard is a necessary prerequisite for ensuring grain quality, extending shelf life, and reducing post-harvest losses.

[0003] With its significant advantages of large single-pass capacity, simple operation process, and no dependence on natural weather conditions, the chamber dryer has been widely used in large-scale grain planting bases, grain purchasing stations, and large-scale storage enterprises. It has become one of the core equipment supporting large-scale grain drying operations, effectively solving the problems of traditional natural sun drying being limited by site and weather and having low efficiency, and providing an important guarantee for the large-scale and intensive development of post-harvest grain processing.

[0004] However, the mainstream traditional chamber dryers currently on the market have significant shortcomings in terms of hot air utilization efficiency. Their hot air circulation mode is generally quite simple, mostly adopting a unidirectional flow design. Specifically, after the high-temperature hot air generated by the hot air generator enters the drying chamber and completes heat exchange with the wet grain, the low-temperature hot air (i.e., exhaust gas) is directly discharged outside the equipment through the exhaust channel. In this process, the exhaust gas still contains a large amount of unutilized waste heat. The direct loss of this waste heat not only causes serious energy waste but also increases the energy consumption cost of the drying operation. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a chamber-type dryer.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A chamber-type dryer includes: an outer chamber with an inner receiving cavity; an inner drying chamber having a drying cavity and an air inlet cavity, wherein the top of the drying cavity has a feed inlet and the bottom of the air inlet cavity has an air inlet; the inner drying chamber is disposed within the receiving cavity, and the peripheral wall of the inner drying chamber is spaced apart from the peripheral wall of the receiving cavity to form an outer cavity; the bottom wall of the inner drying chamber is spaced apart from the bottom wall of the receiving cavity to form an air inlet bottom cavity; the air inlet bottom cavity and the air inlet cavity are connected through an air inlet; a hot air furnace having an air inlet pipe and an air outlet pipe, wherein the air inlet pipe is connected to the outer cavity and the air outlet pipe is connected to the air inlet bottom cavity; and a first fan installed below the air inlet for blowing air toward the air inlet.

[0007] Furthermore, the bottom of the drying chamber is provided with support feet, and the bottom of the support feet is connected to the bottom wall of the receiving cavity.

[0008] Furthermore, the drying chamber is provided in two parts, and the air inlet chamber is located between the two drying chambers.

[0009] Furthermore, an air inlet corner box and an air outlet corner box are inserted into the drying chamber. The air inlet corner box is connected to the air inlet chamber, and the air outlet corner box is connected to the outer chamber. The air inlet corner box and the air outlet corner box are arranged in a matrix and staggered in the horizontal and vertical directions.

[0010] Furthermore, the air inlet corner box and the air outlet corner box are inverted V-shaped, and the side walls of the air inlet corner box and the air outlet corner box are provided with inwardly protruding ventilation protrusions. The ventilation protrusions are provided with flow channels, and the flow channels extend from the outside to the inside in an inclined upward direction.

[0011] Furthermore, the cross-section of the outer cavity is U-shaped, the air inlet corner box and the air outlet corner box extend in the left and right direction, and the air inlet pipe and the air outlet pipe are connected to the front or rear side wall of the outer cavity.

[0012] Furthermore, a feed pipe is installed at the upper end of the outer chamber, a feed screw is installed inside the feed pipe, and a material distribution component is connected to the lower end of the feed pipe. The material distribution component has two symmetrical, inclined, downward-extending, and gradually moving-away material distribution channels. The lower end of the material distribution channels is connected to the feed inlet of the corresponding drying chamber.

[0013] Furthermore, a dust removal pipe is connected to the upper end of the feed pipe, and a dust removal fan is connected to the outer end of the dust removal pipe.

[0014] Furthermore, the outer compartment is provided with an air outlet at the top of the outer cavity; a dehumidifying fan is installed on the outside of the air outlet, and the air outlet of the dehumidifying fan is connected to an exhaust pipe.

[0015] Furthermore, the air inlet pipe is connected to the middle or top of the outer cavity in the height direction.

[0016] The present invention has the following beneficial effects: This invention utilizes a design where the outer chamber and the inner drying chamber are spaced apart to form an outer cavity, and the bottom wall is spaced apart to form an air inlet cavity. Combined with the design where the air inlet pipe of the hot air furnace is connected to the outer cavity and the air outlet pipe is connected to the air inlet cavity, a closed-loop circulation path is created, connecting the hot air furnace, the air inlet cavity, the drying chamber, the outer cavity, and back to the hot air furnace. Unlike traditional equipment that directly discharges waste gas after heat exchange, in this invention, a portion of the hot air after heat exchange with the wet grain can flow back to the hot air furnace through the outer cavity, be reheated, and participate in the drying process again. This effectively recovers the waste heat lost directly in traditional equipment, reducing energy waste and lowering the energy consumption cost of the drying operation. The first fan can precisely blow air towards the air inlet, providing directional driving force for the hot air to enter the air inlet cavity, ensuring that the hot air quickly fills the air inlet cavity. The directional flow of hot air results in faster circulation and higher heat exchange efficiency, shortening the overall drying time and improving the efficiency of a single drying operation. This invention employs a nested structure of an outer chamber and an inner drying chamber. While achieving hot air circulation, the outer chamber effectively protects and insulates the inner drying chamber. A feed inlet is located at the top of the drying chamber for convenient batch material input. The arrangement of each chamber (outer chamber, bottom air inlet chamber, air inlet chamber, and drying chamber) and the connection method of the air ducts (air inlet pipe and air outlet pipe) result in a compact overall structure. Through a rational layout of the chambers (outer chamber, bottom air inlet chamber, air inlet chamber, and drying chamber) and a hot air circulation design, this invention effectively optimizes drying results and improves operational efficiency while enhancing energy utilization efficiency and reducing energy costs. Furthermore, the structure is practical and stable.

[0017] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is an internal sectional view from one perspective of the present invention; Figure 2 This is a cross-sectional perspective view of the present invention; Figure 3 This is an internal sectional view from another perspective of the present invention; Figure 4 yes Figure 3 Sectional view at point AA; Figure 5 It is a cross-sectional view of the air inlet corner box and the air outlet corner box; Figure 6 yes Figure 5 Enlarged view at point B.

[0019] Legend: Outer compartment 100, receiving cavity 110, dehumidifying fan 120, exhaust pipe 121, support leg 130, feed pipe 140, feed screw 141, dust removal pipe 142, dust removal fan 143; Drying inner chamber 200, outer cavity 201, air inlet bottom cavity 202, drying cavity 210, feed inlet 211, air inlet cavity 220, air inlet 221; Hot air furnace 300, air inlet pipe 310, air outlet pipe 320; First fan 400; Air inlet corner box 500, ventilation protrusion 510, flow passage 511; Air outlet box 600; Material distribution component 700, material distribution channel 710; Grain discharge auger 800, receiving hopper 810, elevator 820. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] Please refer to Figure 1 and Figure 2 The present invention provides a preferred embodiment of a chamber-type dryer.

[0025] It includes an outer chamber 100, an inner drying chamber 200, a hot air furnace 300, and a first blower 400.

[0026] An accommodating cavity 110 is formed inside the outer compartment 100.

[0027] The drying chamber 200 has a drying cavity 210 and an air inlet cavity 220. The top of the drying cavity 210 is provided with a feed inlet 211, and the bottom of the air inlet cavity 220 is provided with an air inlet 221. The drying chamber 200 is located inside the receiving cavity 110, and the peripheral wall of the drying chamber 200 is spaced apart from the peripheral wall of the receiving cavity 110 to form an outer cavity 201. The bottom wall of the drying chamber 200 is spaced apart from the bottom wall of the receiving cavity 110 to form an air inlet bottom cavity 202. It can be understood that the space inside the receiving cavity 110 that is lower than the bottom wall of the drying chamber 200 is the air inlet bottom cavity 202, and the outer peripheral edge of the air inlet bottom cavity 202 is connected to the bottom of the outer cavity 201.

[0028] The air inlet bottom cavity 202 and the air inlet cavity 220 are connected through the air inlet 221.

[0029] The hot blast furnace 300 is equipped with an inlet pipe 310 and an outlet pipe 320. The inlet pipe 310 is connected to the outer cavity 201, and the outlet pipe 320 is connected to the inlet bottom cavity 202. Specifically, the hot blast furnace 300 has a heating chamber, and the hot air generated by combustion enters the heating chamber. The inlet pipe 310 and the outlet pipe 320 are connected by a continuous heat exchange pipe. The heat exchange pipe completes heat exchange within the heating chamber, thereby preventing combustion flue gas from entering the drying chamber. A fan can be installed on the pipe between the inlet pipe 310 and the outlet pipe 320 or at the ends of the inlet pipe 310 and the outlet pipe 320 to achieve airflow. In addition, an additional air inlet can be opened on the periphery of the inlet pipe 310 and equipped with a valve, so that the valve can be opened when necessary to supplement the airflow into the inlet pipe.

[0030] The first fan 400 is installed below the air inlet 221 and is used to blow air towards the air inlet 221. The first fan 400 is fixed to the bottom wall of the drying chamber 200 and aligned with the air inlet 221, and is used to send the hot air from the bottom air inlet cavity 202 into the air inlet cavity 220.

[0031] This invention utilizes the periphery of the outer chamber 100 and the drying inner chamber 200 to form an outer cavity 201, and the bottom wall of the inner chamber to form an air inlet cavity 202. Combined with the design of the hot air furnace 300, where the air inlet pipe 310 is connected to the outer cavity 201 and the air outlet pipe 320 is connected to the air inlet cavity 202, a portion of the hot air forms a closed-loop circulation path connecting the hot air furnace 300, the air inlet cavity 202, the air inlet chamber 220, the drying chamber 210, the outer cavity 201, and the hot air furnace 300. Unlike traditional equipment that directly discharges waste gas after heat exchange, in this invention, a portion of the hot air after heat exchange with the wet grain can be returned to the hot air furnace 300 through the outer cavity 201, reheated, and then used again in the drying process. This effectively recovers the waste heat lost directly in traditional equipment, reduces energy waste, and lowers the energy consumption cost of the drying operation. The first fan 400 can precisely blow air towards the air inlet 221, providing directional driving force for hot air to enter the air inlet cavity 220. This ensures that the hot air quickly fills the air inlet cavity 220, resulting in faster hot air flow and higher heat exchange efficiency. This shortens the overall drying time and improves the efficiency of a single drying operation. The invention employs a nested structure of an outer chamber 100 and an inner drying chamber 200. While achieving hot air circulation, the outer chamber 100 effectively protects and insulates the inner drying chamber 200, preventing the high temperature inside the inner drying chamber 200 from directly dissipating outwards. An insulation layer is formed around the outer perimeter of the inner drying chamber 200, effectively reducing heat loss compared to direct contact between the inner drying chamber 200 and the outside air. Furthermore, an insulation layer can be installed on the perimeter wall of the outer chamber 100 to enhance the insulation effect.

[0032] A feed inlet 211 is provided at the top of the drying chamber 210 to facilitate the batch feeding of materials. The arrangement of each chamber (outer chamber 201, bottom air inlet chamber 202, air inlet chamber 220, drying chamber 210) and the connection method of the air ducts (air inlet pipe 310, air outlet pipe 320) make the overall structure of the equipment compact. Through the reasonable layout of the chambers (outer chamber 201, bottom air inlet chamber 202, air inlet chamber 220, drying chamber 210) and the hot air circulation design, this invention effectively optimizes the drying effect and improves the operating efficiency while improving energy utilization efficiency and reducing energy consumption costs, and the structure is practical and stable.

[0033] Reference Figure 2 In some embodiments of the present invention, the bottom of the drying inner chamber 200 is provided with a support foot 130, and the bottom of the support foot 130 is connected to the bottom wall of the receiving cavity 110. By providing a support foot 130 at the bottom of the drying inner chamber 200, and the bottom of the support foot 130 being connected to the bottom wall of the receiving cavity 110, and the upper and lower ends of the support foot 130 being fixedly connected to the bottom walls of the drying inner chamber 200 and the outer chamber 100, the bottom of the drying inner chamber 200 is connected and fixed, while the bottom wall of the drying inner chamber 200 and the bottom wall of the receiving cavity 110 are spaced apart, providing stable structural support for the formation of the air inlet cavity 202.

[0034] Reference Figure 2In some embodiments of the present invention, two drying chambers 210 are provided, with an air inlet chamber 220 located between the two drying chambers 210. By providing two drying chambers 210 and the air inlet chamber 220 located between them, symmetrical distribution of hot air is achieved. The hot air in the air inlet chamber 220 can simultaneously diffuse to the drying chambers 210 on both sides, ensuring that the hot air supply and diffusion rate in both drying chambers 210 remain consistent, guaranteeing the uniformity of drying conditions on both sides and improving the overall consistency of drying quality. Simultaneously, the dual drying chambers 210 can effectively increase the single-batch drying capacity and improve operational efficiency without significantly increasing the overall size of the equipment.

[0035] Reference Figure 1 and Figure 3 In a further embodiment of the present invention, an air inlet box 500 and an air outlet box 600 are inserted into the drying chamber 210. The air inlet box 500 is connected to the air inlet chamber 220, and the air outlet box 600 is connected to the outer chamber 201. Specifically, one end of the air inlet box 500 passes through the side wall of the drying chamber 210 and communicates with the air inlet chamber 220, thereby enabling hot air to enter; the other end is fitted against the inner wall of the drying chamber 210, preventing hot air from being directly output to the outer chamber 201 from the other end. One end of the air outlet box 600 passes through the side wall of the drying chamber 210 and communicates with the outer chamber 201, thereby enabling hot air to exit; the other end is fitted against the inner wall of the drying chamber 210, preventing hot air from directly entering from the other end of the air outlet box 600. The air inlet box 500 and the air outlet box 600 are arranged in a matrix and staggered in both the horizontal and vertical directions. The two are arranged in a matrix and staggered in the horizontal and vertical directions. That is, the air inlet corner box 500 and the air outlet corner box 600 are arranged in a matrix in the vertical and horizontal directions and staggered in the vertical and horizontal directions. The staggered arrangement allows the hot air to form multiple paths in the drying chamber 210. The air inlet corner box 500 is responsible for air intake and the air outlet corner box 600 is responsible for air exhaust. This avoids the hot air entering and exiting in a straight horizontal direction, which would require the hot air to go around before it can be output. This allows the material to have more full contact with the hot air for heat exchange, improving the drying uniformity and heat exchange efficiency.

[0036] Reference Figure 5 and Figure 6In a further embodiment of the present invention, the air inlet corner box 500 and the air outlet corner box 600 are inverted V-shaped. The side walls of the air inlet corner box 500 and the air outlet corner box 600 are provided with inwardly protruding ventilation protrusions 510, that is, ventilation protrusions 510 are provided on opposite sides of the two inclined side walls of the air inlet corner box 500 and the air outlet corner box 600, which gradually move away from each other from top to bottom. The ventilation protrusions 510 are provided with flow channels 511, which extend from the outside inward in an inclined upward direction. The inverted V-shaped structure of the air inlet corner box 500 and the air outlet corner box 600 can effectively reduce the accumulation of material on the surface of the corner box, prevent material from blocking the ventilation channel, and ensure smooth airflow. Meanwhile, the inward-protruding ventilation protrusions 510 on both sides of the corner box and the internal flow channels 511 ensure that hot air not only flows out from the lower opening but also dissipates outward through the flow channels 511. This increases the range and dimension of hot air flow, creating multi-point cross-contact with the falling or accumulated materials in the drying chamber 210, further enhancing the sufficiency and uniformity of heat exchange. The flow channels 511 can guide some hot air to dead corner areas within the drying chamber, preventing incomplete drying at material accumulation points. On the other hand, the upward-sloping channel design slows down the hot air velocity, extending the heat exchange time between the hot air and the materials. The ventilation protrusions 510 also enhance the structural strength of the corner box, preventing deformation caused by material compression during long-term use and ensuring the service life of the equipment. The flow channel 511 extends from the outside to the inside in an inclined upward direction, making it difficult for external materials to flow upward into the corner box within the flow channel 511, thus reducing material blockage of the flow channel 511. In addition, the hot air blows from the inside to the outside, which also reduces the material from clogging the flow channel 511 with dust, achieving self-cleaning.

[0037] Reference Figure 4 In a further embodiment of the present invention, the cross-section of the outer cavity 201 is U-shaped, with the air inlet corner box 500 and the air outlet corner box 600 extending in the left-right direction. The air inlet pipe 310 and the air outlet pipe 320 are connected to the front or rear side wall of the outer cavity 201. The U-shaped cross-section of the outer cavity 201 can form a surrounding airflow channel, allowing the hot air output from the left and right sides to converge. Furthermore, the connection of the air inlet pipe 310 and the air outlet pipe 320 to the front or rear side wall of the outer cavity 201 prevents the hot air flow speed on one side from being faster due to the air inlet pipe 310, thus affecting the drying uniformity of the left and right drying chambers. The connection of the air inlet pipe 310 and the air outlet pipe 320 to the middle position of the front or rear side wall of the outer cavity 201 ensures that the air inlet and outlet of the two drying chambers are symmetrical, without affecting the drying uniformity.

[0038] Reference Figure 2In some embodiments of the present invention, a feed pipe 140 is installed at the upper end of the outer chamber 100, and a feed screw 141 is installed inside the feed pipe 140. A motor 144 is provided outside the feed pipe 140 to drive the feed screw 141 to rotate. A material distribution component 700 is connected to the lower end of the feed pipe 140. The material distribution component 700 has two symmetrical, inclined, downward-extending, and gradually moving apart material distribution channels 710. The lower end of the material distribution channels 710 communicates with the feed inlet 211 of the corresponding drying chamber 210. A material distribution port communicating with the material distribution channels 710 is provided at the lower end of the feed pipe 140. The feed screw 141 installed inside the feed pipe 140 at the upper end of the outer chamber 100 can realize continuous and uniform feeding of materials, avoiding material accumulation or uneven feeding problems caused by manual feeding. The material distribution component 700 connected to the lower end of the feed pipe 140 is provided with two symmetrically inclined downward and gradually spaced-away material distribution channels 710, which are correspondingly connected to the feed inlets 211 of the two drying chambers 210, and can evenly distribute the material conveyed by the feed pipe 140 into the two drying chambers 210. The symmetrically inclined material distribution channels 710 can use gravity to assist the material in falling.

[0039] Specifically, a grain discharge auger 800 is provided at the bottom of the drying chamber 210 to discharge grain to the outside of the drying inner silo 200. A receiving hopper 810 is also provided for this purpose. Part of the receiving hopper 810 extends into the receiving chamber 110 to receive the grain discharged by the grain discharge auger 800 to the outside of the drying inner silo 200. Part of the receiving hopper 810 is located outside the receiving chamber 110. An elevator 820 is provided outside the outer silo 100. The bottom of the elevator 820 is inside the receiving hopper 810 to lift the grain up and finally transport it to the feed pipe 140.

[0040] Reference Figure 2 In a further embodiment of the present invention, a dust removal pipe 142 is connected to the upper end of the feed pipe 140, and a dust removal fan 143 is connected to the outer end of the dust removal pipe 142. The connection of the dust removal pipe 142 to the upper end of the feed pipe 140 and the installation of the dust removal fan 143 at the outer end of the dust removal pipe 142 form a dust removal system during the feeding process. Dust generated during material conveying within the feed pipe 140 can be extracted through the dust removal pipe 142 under the negative pressure of the dust removal fan 143. After extraction, it can be connected to purification and dust removal equipment (such as a bag filter) for air purification, effectively reducing dust diffusion during the feeding process and improving the working environment. Simultaneously, it prevents dust from adhering to the inner wall of the feed screw 141 or the distribution channel 710, reducing equipment malfunctions and ensuring smooth feeding and distribution.

[0041] Reference Figure 2In a further embodiment of the present invention, the outer chamber 100 is provided with an air outlet at the top of the outer cavity 201; a dehumidifying fan 120 is installed outside the air outlet, and the air outlet of the dehumidifying fan 120 is connected to an exhaust pipe 121. This enables the removal of moisture during the drying process. Of course, the operating state of the dehumidifying fan 120 can also be adjusted according to the drying progress to balance the relationship between hot air circulation and moisture removal, avoid waste of residual heat caused by excessive dehumidification, and achieve a balance between energy saving and efficient drying.

[0042] Reference Figure 1 In a further embodiment of the present invention, the air inlet pipe 310 is connected to the middle or top of the outer cavity 201 in the height direction. Connecting the air inlet pipe 310 to the middle or top of the outer cavity 201 in the height direction avoids the air inlet pipe 310 being close to the air outlet pipe, which would cause short-circuiting and prevent hot air from directly entering the air inlet pipe 310 after being output from the air outlet pipe, resulting in hot air short-circuiting and affecting the drying effect.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A housing-type drying machine, characterized by, include: The outer compartment (100) has an inner cavity (110). The drying chamber (200) has a drying cavity (210) and an air inlet cavity (220). The drying cavity (210) has a feed inlet (211) at the top and an air inlet (221) at the bottom. The drying chamber (200) is located inside the receiving cavity (110), and the periphery of the drying chamber (200) is spaced apart from the periphery of the receiving cavity (110) to form an outer cavity (201). The bottom wall of the drying chamber (200) is spaced apart from the bottom wall of the receiving cavity (110) to form a bottom air inlet cavity (202). The bottom air inlet cavity (202) and the air inlet cavity (220) are connected through the air inlet (221). The hot air furnace (300) is provided with an air inlet pipe (310) and an air outlet pipe (320). The air inlet pipe (310) is connected to the outer cavity (201), and the air outlet pipe (320) is connected to the air inlet bottom cavity (202). The first fan (400) is installed below the air inlet (221) and is used to blow air toward the air inlet (221).

2. The housing dryer according to claim 1, characterized in that, The bottom of the drying chamber (200) is provided with a support foot (130), and the bottom of the support foot (130) is connected to the bottom wall of the receiving cavity (110).

3. The house dryer according to claim 1, characterized in that, The drying chamber (210) is provided in two parts, and the air inlet chamber (220) is located between the two drying chambers (210).

4. The house dryer according to claim 3, characterized in that, An air inlet box (500) and an air outlet box (600) are inserted into the drying chamber (210). The air inlet box (500) is connected to the air inlet chamber (220), and the air outlet box (600) is connected to the outer chamber (201). The air inlet box (500) and the air outlet box (600) are arranged in a matrix and staggered in the horizontal and vertical directions.

5. The house dryer according to claim 4, characterized in that, The air inlet corner box (500) and the air outlet corner box (600) are inverted V-shaped. The air inlet corner box (500) and the air outlet corner box (600) have inwardly protruding ventilation protrusions (510) on both side walls. The ventilation protrusions (510) are provided with flow channels (511), which extend from the outside to the inside in an inclined upward direction.

6. The house dryer according to claim 4, characterized in that, The cross-section of the outer cavity (201) is U-shaped. The air inlet corner box (500) and the air outlet corner box (600) extend in the left and right directions. The air inlet pipe (310) and the air outlet pipe (320) are connected to the front or rear side wall of the outer cavity (201).

7. The house-type dryer according to claim 3, characterized in that, The upper end of the outer chamber (100) is equipped with a feed pipe (140), and a feed screw (141) is installed inside the feed pipe (140). The lower end of the feed pipe (140) is connected to a material distribution component (700). The material distribution component (700) is provided with two symmetrical, inclined, downward-extending, and gradually moving-away material distribution channels (710). The lower end of the material distribution channel (710) is connected to the feed inlet (211) of the corresponding drying chamber (210).

8. The house dryer according to claim 7, characterized in that The upper end of the feed pipe (140) is connected to a dust removal pipe (142), and the outer end of the dust removal pipe (142) is connected to a dust removal fan (143).

9. The house dryer according to claim 1, characterized in that, The outer bin (100) is provided with an air outlet at the top of the outer cavity (201); a dehumidifying fan (120) is installed outside the air outlet, and an exhaust pipe (121) is connected to the air outlet of the dehumidifying fan (120).

10. The house dryer according to claim 1, characterized in that, The air inlet pipe (310) is connected to the middle or top of the height direction of the outer cavity (201).

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