A grain air conditioner and its heat-insulating and air-tight structure

Abstract

The utility model provides a kind of grain air conditioner and its heat-insulated airtight structure, including shell, the shell includes front wall, back wall, bottom wall, upper wall and two lateral walls, the front wall, back wall, bottom wall, upper wall and two lateral walls are enclosed and are accommodated cavity, the front wall is equipped with air inlet and air outlet with the communication of accommodating cavity, the air outlet is located above air inlet, the lower side of front wall, back wall and two lateral walls are fixed on bottom wall, the upper side of front wall, back wall and two lateral walls are fixed on upper wall, baffle and heat preservation board are arranged in shell, four lateral walls of the baffle are connected with upper wall, bottom wall, front wall, back wall respectively, four lateral walls of the heat preservation board are connected with baffle, front wall, back wall, lateral wall respectively, the heat preservation board, front wall, lateral wall, baffle, back wall, upper wall are enclosed and are enclosed heat preservation cavity, the heat preservation cavity is located above air outlet, to reach the purpose of guaranteeing cooling effect.

Description

Technical Field

[0001] This utility model relates to grain air conditioning, and more particularly to a grain air conditioning system and its heat-insulating and airtight structure. Background Technology

[0002] Chinese patent CN221962325U discloses a top-mounted grain air conditioner for grain depots. The air conditioner described in the patent includes a casing, the interior of which is divided into two independent parts: an internal cooling circulation chamber and an external heat exchange circulation chamber.

[0003] According to the patent, the internal refrigeration circulation chamber is equipped with an evaporator and an internal circulation fan, and is connected to the inside of the grain silo through an internal air outlet and an internal air return outlet on the casing. The external heat exchange circulation chamber is equipped with a condenser and an external circulation fan, and exchanges heat with the outside through an external air outlet and an external air return outlet on the casing.

[0004] The patent has a design flaw in the airflow path within the chamber. Specifically, the air outlet is positioned above the return air vent. This means that air is drawn in from the return air vent below, cooled by the evaporator, and then exhausted from the air outlet above.

[0005] Because both the air outlet and return air vents are located on the same side of the casing, the air needs to make a 180-degree turn after passing through the evaporator before being exhausted from the top outlet. During this process, the airflow directly impacts the upper wall of the casing. This part of the upper wall is in direct contact with the external environment, resulting in heat exchange. Therefore, before the air is exhausted, its temperature rises again due to heat exchange, thus reducing the overall cooling effect. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a grain air conditioner and its heat-insulating and airtight structure to ensure the cooling effect.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: a heat-insulating and airtight structure, including a housing, the housing including a front wall, a rear wall, a bottom wall, an upper wall and two side walls, the front wall, rear wall, bottom wall, upper wall and two side walls forming a receiving cavity, the front wall having an air inlet and an air outlet communicating with the receiving cavity, the air outlet being located above the air inlet, the lower sides of the front wall, rear wall and two side walls being fixed to the bottom wall, the upper sides of the front wall, rear wall and two side walls being fixed to the upper wall, a partition and an insulation board being provided inside the housing, the four side walls of the partition being connected to the upper wall, bottom wall, front wall and rear wall respectively, the four side walls of the insulation board being connected to the partition, front wall, rear wall and side walls respectively, the insulation board, front wall, side walls, partition, rear wall and upper wall forming a sealed insulation cavity, the insulation cavity being located above the air outlet.

[0008] To achieve the above technical solution, external air enters the housing cavity through the lower air inlet, is processed by internal functional components, flows upward, and is prepared to be discharged from the upper air outlet. During this process, due to the presence of a sealed, insulated cavity formed by partitions and insulation panels, located directly above the air outlet, the processed low-temperature airflow is isolated from the upper part of its path by the bottom wall of this insulated cavity as it turns to flow out. This effectively prevents the low-temperature airflow from directly impacting and contacting the upper wall of the casing, which is hotter due to external environmental influences, fundamentally blocking unfavorable heat exchange occurring there. This significantly prevents unnecessary loss of cooling capacity, ensures the temperature stability of the delivered airflow, and thus effectively improves the overall cooling efficiency and energy-saving performance of the equipment.

[0009] As a preferred embodiment of this utility model, the insulation board, front wall, side wall, partition, rear wall, and upper wall are all fixedly connected with insulation cotton on the side facing the insulation cavity.

[0010] To achieve the above technical solution, thermal insulation cotton is fixedly connected to the inner sides of each wall forming the insulation cavity, further optimizing the heat transfer path. When external heat attempts to be conducted inward through the upper wall of the casing, it must first pass through the air layer inside the insulation cavity, and then through the insulation cotton layer with extremely low thermal conductivity. Utilizing the excellent thermal insulation properties of the insulation cotton, the insulation capacity of the insulation cavity itself is greatly enhanced, further reducing the efficiency of heat conduction through the cavity walls. This more thoroughly blocks the impact of high external temperatures on the interior of the casing, especially on the lower low-temperature airflow channel, optimizing the thermal insulation effect of the equipment and thus maximizing cooling efficiency.

[0011] As a preferred embodiment of this utility model, the side of the insulation cotton facing the insulation cavity is connected to a waterproof layer.

[0012] To achieve the above technical solution, during equipment operation, condensation occurs on the inner wall of the insulation cavity due to significant temperature differences. This waterproof layer forms an effective barrier against liquid water penetration. It effectively prevents condensation from entering the insulation cotton, ensuring that the insulation cotton remains dry throughout long-term use, thus maintaining its efficient and stable thermal insulation performance. Simultaneously, this also avoids problems such as mold and corrosion that may occur due to material moisture, significantly enhancing the durability and reliability of the entire airtight insulation structure.

[0013] As a preferred embodiment of this utility model, a support frame is fixedly connected to the inner wall of the insulation cavity, the insulation board is connected to the support frame, a drain hole for condensate drainage is provided on the support frame, a water guide pipe is fixedly connected to the lower surface of the support frame, and the upper end of the water guide pipe communicates with the drain hole.

[0014] To achieve the above technical solution, a support frame is installed on the inner wall of the insulation cavity, providing a stable mounting base for the insulation board. This support frame also integrates a condensate management function. When condensation occurs on the inner wall of the insulation cavity, water droplets collect due to gravity and flow through pre-designed drainage holes into a connected water pipe, ultimately being systematically discharged out of the casing. This not only ensures the secure and precise installation of the insulation board but, more importantly, establishes an active and efficient condensate drainage path. This effectively solves the problem of potential water accumulation within the sealed cavity, preventing long-term moisture corrosion of internal components, thus ensuring the safe operation and long lifespan of the equipment and improving the overall structural reliability.

[0015] As a preferred embodiment of this utility model, the side of the insulation board facing away from the insulation cavity is connected to a guide plate for guiding air to the air outlet, and the guide plate is inclined.

[0016] To achieve the above technical solution, when the treated air flows upward to the outlet area, the guide vane uses its inclined surface to smoothly guide the airflow from the vertical direction to the horizontal direction and directly deliver it out of the outlet. This effectively reduces energy loss and sudden drops in local pressure caused by impact and eddies when the airflow turns, resulting in more uniform and smoother airflow.

[0017] In a preferred embodiment of this utility model, the insulation board has an upper groove on the side facing the support frame, and the support frame has a lower groove on the side facing the insulation board, with a sealing ring connecting the lower groove and the upper groove.

[0018] To achieve the above technical solution, a highly reliable sealing structure is constructed by setting matching upper and lower grooves on the insulation board and support frame, with a sealing ring embedded between them. During installation, the insulation board and support frame are pressed against each other, causing the sealing ring to elastically deform under the constraint of the groove, thus tightly filling all potential gaps between them. This greatly enhances the airtightness between the insulation cavity and the external airflow channel, effectively eliminating the risk of air leakage or condensate seepage at this connection point. It ensures that the complete sealing and thermal insulation function of the insulation cavity is not affected, and also guarantees that condensate can be completely collected and guided to the designated drainage system, comprehensively improving the sealing reliability and functional stability of the structure.

[0019] As a preferred embodiment of this utility model, a counterweight is connected to the side of the insulation board facing the insulation cavity, and the counterweight has a hanging hole.

[0020] The above technical solution addresses two key technical issues by adding counterweights to the insulation board. Firstly, during equipment operation, the high-speed airflow generated by the fan exerts a significant upward force on the insulation board directly above. The counterweights, using their own weight, provide continuous downward pressure, effectively counteracting this upward force and ensuring the insulation board remains tightly and stably attached to the support frame below. Secondly, during installation and maintenance, the pre-drilled holes on the counterweights provide a convenient interface for hoisting operations. Operators can use these holes and tools to install or remove the insulation board effortlessly and smoothly. This balances operational stability with ease of installation and maintenance. On one hand, by increasing the component's weight, the risk of the insulation board floating, vibrating, or even separating from the support frame due to excessive wind force is effectively prevented, ensuring the airtightness of the airflow channel and the structural stability. On the other hand, it significantly reduces the labor intensity of on-site construction and maintenance, improving operational efficiency and safety.

[0021] This utility model also discloses a grain air conditioner, including an evaporator, a fan, a condenser, a compressor, and an expansion valve located inside the casing, and also includes a heat-insulating and airtight structure. The evaporator corresponds to the air inlet, the fan corresponds to the air outlet, the fan is located between the air outlet and the insulation cavity, the side wall is provided with a heat dissipation vent, the condenser corresponds to the heat dissipation vent, the two ends of the compressor are respectively connected to the condenser and the evaporator, and the evaporator is connected to the condenser through the expansion valve.

[0022] To achieve the above technical solution, during operation, the refrigerant in the grain air conditioner flows in a closed-loop cycle consisting of a compressor, condenser, expansion valve, and evaporator, thus transferring heat. The specific workflow is as follows: air inside the silo is drawn in through the air inlet. As it flows through the evaporator, its heat is absorbed by the evaporating refrigerant, thereby cooling and dehumidifying the air. The treated low-temperature air, driven by a fan located between the insulation chamber and the evaporator, is sent back to the grain silo through the air outlet. Simultaneously, the gaseous refrigerant, having absorbed heat, is compressed by the compressor and sent to the condenser, where it exchanges heat with the outside air through the heat dissipation vents, releasing heat and condensing into a liquid state, completing one refrigeration cycle. By organically combining a mature refrigeration cycle system with an insulated and airtight structure, this grain air conditioner structurally eliminates the technical defect of low-temperature air being reheated by the casing heat before being discharged. The final technical effect is: the entire unit possesses extremely high cooling efficiency and energy utilization, stable outlet air temperature, reliable operation, and can provide precise, energy-saving, and long-lasting low-temperature environment control for grain storage. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a schematic diagram of the bottom wall structure; Figure 3 This is a schematic diagram of the exploded structure of this utility model; Figure 4 A schematic diagram showing the location of the insulation cavity; Figure 5 To illustrate the structural diagram of the support frame; Figure 6 To illustrate the structural diagram of the insulation board; Figure 7 To illustrate the structural diagram of the air guide plate; Figure 8 This is a cross-sectional diagram illustrating the relationship between the insulation material and the waterproof layer.

[0024] Reference numerals: 1. Housing; 2. Front wall; 3. Rear wall; 4. Bottom wall; 5. Top wall; 6. Side wall; 7. Air inlet; 8. Air outlet; 9. Partition; 10. Insulation board; 11. Insulation cotton; 12. Waterproof layer; 13. Support frame; 14. Drain hole; 15. Water pipe; 16. Upper groove; 17. Lower groove; 18. Sealing ring; 19. Counterweight; 20. Hanging hole; 21. Evaporator; 22. Condenser; 23. Compressor; 24. Air guide plate; 25. Heat dissipation vent. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0026] Example 1: A heat-insulating and airtight structure includes a housing 1, which comprises a front wall 2, a rear wall 3, a bottom wall 4, an upper wall 5, and two side walls 6. The front wall 2 and the rear wall 3 are arranged opposite each other and parallel to each other, and the front wall 2, the rear wall 3, and the two side walls 6 are all placed vertically. The two side walls 6 are located on the left and right sides of the front wall 2, respectively.

[0027] The upper ends of the front wall 2, rear wall 3, and two side walls 6 are all fixedly connected to the lower surface of the upper wall 5, and the lower ends of the front wall 2, rear wall 3, and two side walls 6 are all fixedly connected to the upper surface of the bottom wall 4. The two ends of the side walls 6 are fixedly connected to the front wall 2 and rear wall 3. The upper wall 5 and bottom wall 4 are both placed horizontally. Thus, the front wall 2, rear wall 3, bottom wall 4, upper wall 5, and two side walls 6 form a square receiving cavity.

[0028] An air inlet 7 and an air outlet 8, which are connected to the receiving cavity, are provided on the front wall 2, with the air outlet 8 located above the air inlet 7.

[0029] A partition 9 and an insulation board 10 are installed inside the casing 1. The partition 9 is vertically arranged, and its four side walls are fixedly connected to the upper wall 5, bottom wall 4, front wall 2, and rear wall 3, respectively. The insulation board 10 is horizontally arranged. The four side walls of the insulation board 10 are connected to the partition 9, front wall 2, rear wall 3, and side wall 6, respectively. A sealed insulation cavity is formed between the insulation board 10, front wall 2, side wall 6, partition 9, rear wall 3, and upper wall 5. The insulation cavity has a square structure and is located above the air outlet 8.

[0030] Insulation cotton 11 is fixedly connected to the insulation board 10, front wall 2, side wall 6, partition 9, rear wall 3, and upper wall 5 on the side facing the insulation cavity. The insulation cotton 11 can be made of glass wool. A waterproof layer 12 is fixedly connected to the side of the insulation cotton 11 facing the insulation cavity. The waterproof layer 12 can be made of aluminum foil film.

[0031] A square support frame 13 is fixedly connected to the inner wall of the insulation cavity, and the insulation board 10 is placed on the support frame 13. The support frame 13 is a hollow aluminum profile. A drain hole 14 for condensate drainage is provided on the support frame 13, and the drain hole 14 is vertically arranged and passes through the support frame 13. A water guide pipe 15 is fixedly connected to the lower surface of the support frame 13, and the upper end of the water guide pipe 15 communicates with the drain hole 14.

[0032] An upper groove 16 is provided on the side of the insulation board 10 facing the support frame 13, and a lower groove 17 is provided on the side of the support frame 13 facing the insulation board 10. A sealing ring 18 is embedded between the lower groove 17 and the upper groove 16. The sealing ring 18 is a rubber sealing ring 18.

[0033] A counterweight 19 is fixedly connected to the side of the insulation board 10 facing the insulation cavity, and the counterweight 19 has hanging holes 20. The aforementioned insulation cotton 11 covers the upper surface of the counterweight 19. The counterweight 19 is long and strip-shaped and can be made of steel.

[0034] A guide plate 24 for directing airflow to the air outlet 8 is fixedly connected to the side of the insulation board 10 facing away from the insulation cavity. The guide plate 24 is inclined.

[0035] Example 2: A grain-growing air conditioner includes an evaporator 21, a fan, a condenser 22, a compressor 23, and an expansion valve located within a casing 1, representing a heat-insulated and airtight structure of Example 1. The evaporator 21 corresponds to the air inlet 7, and the fan corresponds to the air outlet 8. The fan is fixed to the side of the front wall 2 facing the receiving cavity, positioning it between the air outlet 8 and the insulation cavity. A heat dissipation vent 25 is provided on the side wall 6, and the condenser 22 corresponds to the heat dissipation vent 25. Both ends of the compressor 23 are connected to the condenser 22 and the evaporator 21, respectively. The evaporator 21 is connected to the condenser 22 via the expansion valve.

[0036] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A heat-insulating and airtight structure, comprising a housing (1), the housing (1) comprising a front wall (2), a rear wall (3), a bottom wall (4), an upper wall (5), and two side walls (6), the front wall (2), rear wall (3), bottom wall (4), upper wall (5), and two side walls (6) forming a receiving cavity, the front wall (2) having an air inlet (7) and an air outlet (8) communicating with the receiving cavity, the air outlet (8) being located above the air inlet (7), the lower sides of the front wall (2), rear wall (3), and two side walls (6) being fixed to the bottom wall (4), and the upper sides of the front wall (2), rear wall (3), and two side walls (6) being fixed to the upper wall (5), characterized in that: The housing (1) is provided with a partition (9) and an insulation board (10). The four side walls of the partition (9) are connected to the upper wall (5), the bottom wall (4), the front wall (2), and the rear wall (3) respectively. The four side walls of the insulation board (10) are connected to the partition (9), the front wall (2), the rear wall (3), and the side wall (6) respectively. The insulation board (10), the front wall (2), the side wall (6), the partition (9), the rear wall (3), and the upper wall (5) form a closed insulation cavity. The insulation cavity is located above the air outlet (8).

2. The heat-insulating and airtight structure according to claim 1, characterized in that: Insulating cotton (11) is fixedly connected to the side of the insulation board (10), front wall (2), side wall (6), partition (9), rear wall (3), and upper wall (5) facing the insulation cavity.

3. The heat-insulating and airtight structure according to claim 2, characterized in that: The insulating cotton (11) is connected to a waterproof layer (12) on the side facing the insulating cavity.

4. The heat-insulating and airtight structure according to claim 1, characterized in that: A support frame (13) is fixedly connected to the inner wall of the insulation cavity. The insulation board (10) is connected to the support frame (13). A drain hole (14) for condensate drainage is provided on the support frame (13). A water guide pipe (15) is fixedly connected to the lower surface of the support frame (13). The upper end of the water guide pipe (15) is connected to the drain hole (14).

5. The heat-insulating and airtight structure according to claim 4, characterized in that: The insulation board (10) is connected to a guide plate (24) on the side facing away from the insulation cavity, which is used to guide the air to the air outlet (8). The guide plate (24) is inclined.

6. The heat-insulating and airtight structure according to claim 4, characterized in that: The insulation board (10) has an upper groove (16) on the side facing the support frame (13), and the support frame (13) has a lower groove (17) on the side facing the insulation board (10). A sealing ring (18) is connected between the lower groove (17) and the upper groove (16).

7. A heat-insulating and airtight structure according to claim 6, characterized in that: The insulation board (10) is connected to a counterweight (19) on the side facing the insulation cavity, and the counterweight (19) has a hanging hole (20).

8. A grain air conditioner, comprising an evaporator (21), a fan, a condenser (22), a compressor (23), and an expansion valve located within a casing (1), characterized in that: It also includes a heat-insulating and airtight structure as described in any one of claims 1-6, wherein the evaporator (21) corresponds to the air inlet (7), the fan corresponds to the air outlet (8), the fan is located between the air outlet (8) and the heat insulation cavity, a heat dissipation vent (25) is provided on the side wall (6), the condenser (22) corresponds to the heat dissipation vent (25), the two ends of the compressor (23) are respectively connected to the condenser (22) and the evaporator (21), and the evaporator (21) is connected to the condenser (22) through an expansion valve.

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