evaporative cooler

Abstract

This utility model relates to a cooler, including a housing. Inside the housing are sequentially arranged a refrigeration component, a heating component, and a fan. The refrigeration component includes a refrigeration finned coil assembly, a refrigeration inlet pipe, and a refrigeration outlet pipe. Refrigerant flows sequentially through the refrigeration inlet pipe, the refrigeration finned coil assembly, and the refrigeration outlet pipe to cool the refrigeration finned coil assembly. The heating component includes a heating finned coil assembly, a heating inlet pipe, and a heating outlet pipe. High-temperature gas flows sequentially through the heating inlet pipe, the heating finned coil assembly, and the heating outlet pipe to heat the heating finned coil assembly. Air enters the housing, first passing through the refrigeration finned coil assembly for cooling, reducing the saturated moisture content of the air, bringing it to a saturated state and releasing excess moisture. Then, it passes through the heating finned coil assembly for heating, increasing the saturated moisture content and reducing the relative humidity. Finally, it passes through the fan and is discharged from the housing. This design reduces the relative humidity of the outlet air, maintaining a dry environment and preventing condensation.

Description

Technical Field

[0001] This utility model relates to the field of air cooler technology, and in particular to an air cooler. Background Technology

[0002] Evaporators, as one of the four core components of a refrigeration system, are a common type of evaporator in cold storage facilities. In current cold storage refrigeration systems, commonly used evaporators consist of six key components: finned coils, housing, axial fan, distributor, defrosting device, and defrosting tray. Their working principle relies on the axial fan to force airflow through the finned coils via convection, thereby achieving heat exchange and cooling.

[0003] Evaporative air coolers have a wide range of applications, including cold storage warehouses, loading docks, blast freezers, and processing workshops. When used in environments below 0°C, such as cold storage warehouses at -18°C or blast freezers at -40°C, the extremely low temperatures and limited influx of warm outside air result in low water vapor content in the air. In these conditions, water vapor condenses into frost on the low-temperature heat exchange fins of the evaporative air cooler, which is then melted into water and discharged by a defrosting device. These environments do not have specific requirements for the relative humidity of the air cooler's outlet; generally, the relative humidity of the air at the outlet can reach over 95%.

[0004] However, the situation is different when the ambient temperature is high, such as in cold storage platforms and operating rooms where the temperature needs to be controlled between 5-10℃. These areas are mostly non-enclosed spaces or contain a lot of moisture: for example, when a vehicle departs from the platform, the fast door needs to be opened to connect with the refrigerated truck, at which time a large amount of moisture enters the platform space, causing a lot of condensation on the platform ceiling, walls, and air cooler casings; another example is the operating workshop (such as the cutting and eviscerating processes in a chicken slaughtering line), where a large amount of water is used in the production process, resulting in a high relative humidity. In addition, the air coolers are usually installed on the ceiling, making the temperature at the top of the workshop relatively low, so the moisture condenses and drips from the top of the workshop.

[0005] Therefore, there is a need for a cooler that can reduce the relative humidity of the air outlet, thereby maintaining a dry environment and preventing condensation. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides a cold air blower.

[0007] The technical solution of this utility model is as follows:

[0008] A type of air cooler includes a housing. A refrigeration component, a heating component, and a fan are sequentially arranged inside the housing. The refrigeration component includes a refrigeration finned coil assembly, a refrigeration inlet pipe, and a refrigeration outlet pipe. The refrigeration inlet pipe is connected to a first end of the refrigeration finned coil assembly, and the refrigeration outlet pipe is connected to a second end of the refrigeration finned coil assembly. Refrigerant flows sequentially through the refrigeration inlet pipe, the refrigeration finned coil assembly, and the refrigeration outlet pipe to cool the refrigeration finned coil assembly. The heating component includes a heating finned coil assembly, a heating inlet pipe, and a heating outlet pipe. The heating inlet pipe is connected to a first end of the heating finned coil assembly, and the heating outlet pipe is connected to a second end of the heating finned coil assembly. High-temperature gas flows sequentially through the heating inlet pipe, the heating finned coil assembly, and the heating outlet pipe to heat the heating finned coil assembly.

[0009] The air enters the housing and is first cooled by the cooling finned coil assembly, which reduces the saturated moisture content of the air. The air is then saturated and excess moisture is released. Next, the air is heated by the heating finned coil assembly, which increases the saturated moisture content and reduces the relative humidity. Finally, the air passes through the fan and is discharged from the housing.

[0010] As a further improvement of this utility model, the high-temperature gas is the hot gas discharged from the compressor unit, the exhaust end of the compressor unit is connected to the heating inlet pipe, and a first solenoid valve is provided between the exhaust end and the heating inlet pipe.

[0011] As a further improvement of this utility model, a defrosting tray is provided at the bottom of the box.

[0012] As a further improvement of this utility model, the defrosting plate is inclined, and the lower side of the defrosting plate is away from the fan.

[0013] As a further improvement of this utility model, the defrosting disc is detachable and replaceable, and multiple defrosting discs are provided, with different tilt angles for the multiple defrosting discs.

[0014] As a further improvement of this utility model, the bottom of the defrosting disc is provided with a defrosting coil tube, and the two ends of the defrosting coil tube are respectively provided with a defrosting inlet pipe and a defrosting outlet pipe. The defrosting inlet pipe is connected to the exhaust end, and the high-temperature gas flows through the defrosting inlet pipe, the defrosting coil tube and the defrosting outlet pipe in sequence to heat the defrosting disc.

[0015] As a further improvement of this utility model, a second solenoid valve is provided between the exhaust end and the defrosting inlet pipe.

[0016] As a further improvement of this utility model, the defrost outlet pipe is connected to the refrigeration inlet pipe, and a blocking element is provided between the defrost coil and the refrigeration coil to prevent the refrigerant from flowing from the refrigeration coil to the defrost coil.

[0017] As a further improvement of this utility model, the blocking element is a first one-way valve, the inlet of the first one-way valve is connected to the defrost outlet pipe, and the outlet of the first one-way valve is connected to the refrigeration inlet pipe.

[0018] As a further improvement of this utility model, a second one-way valve is provided inside the refrigeration inlet pipe.

[0019] According to the above-described solution, the beneficial effects of this utility model are as follows:

[0020] This invention adds a heating component between the refrigeration component and the fan, which heats the air flowing through the heating component, effectively reducing the relative humidity of the air outlet, keeping the cooling environment dry and preventing condensation; it also uses the waste heat of the compressor unit to defrost the air cooler, which is environmentally friendly and energy-saving. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] In the diagram: 1. Housing; 2. Fan; 3. Refrigeration finned coil assembly; 4. Refrigeration inlet pipe; 5. Refrigeration outlet pipe; 6. Heating finned coil assembly; 7. Heating inlet pipe; 8. Heating outlet pipe; 9. Defrosting tray; 91. Defrosting inlet pipe; 92. Defrosting outlet pipe. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] See Figure 1 This utility model provides a cooler, including a housing 1. A refrigeration component, a heating component, and a fan 2 are sequentially arranged inside the housing 1. The refrigeration component includes a refrigeration finned coil assembly 3, a refrigeration inlet pipe 4, and a refrigeration outlet pipe 5. The refrigeration inlet pipe 4 is connected to the first end of the refrigeration finned coil assembly 3, and the refrigeration outlet pipe 5 is connected to the second end of the refrigeration finned coil assembly 3. Refrigerant flows sequentially through the refrigeration inlet pipe 4, the refrigeration finned coil assembly 3, and the refrigeration outlet pipe 5 to cool the refrigeration finned coil assembly 3. The heating component includes a heating finned coil assembly 6, a heating inlet pipe 7, and a heating outlet pipe 8. The heating inlet pipe 7 is connected to the first end of the heating finned coil assembly 6, and the heating outlet pipe 8 is connected to the second end of the heating finned coil assembly 6. High-temperature gas flows sequentially through the heating inlet pipe 7, the heating finned coil assembly 6, and the heating outlet pipe 8 to heat the heating finned coil assembly 6.

[0027] The air enters the housing 1 and is first cooled by the cooling finned coil assembly 3. The saturated moisture content of the air decreases, and the air is in a saturated state and releases excess moisture. At this time, the air is in a saturated state, that is, the relative humidity of the air is 100%. Then, it is heated by the heating finned coil assembly 6. The saturated moisture content of the air increases and the relative humidity decreases. At this time, the air is in an unsaturated state, that is, the relative humidity of the air is much less than 100%. Finally, it passes through the fan 2 and is discharged from the housing 1.

[0028] This invention adds a heating component between the cooling component and the fan 2. The air body first passes through the cooling component to cool down and extract moisture, and then passes through the heating component to heat up. This can dehumidify and dry the cooling environment as much as possible without causing the temperature of the cooling environment to rise, effectively reducing the relative humidity of the air outlet, keeping the cooling environment dry and avoiding condensation.

[0029] The working principle is as follows:

[0030] The high-humidity airflow first passes through the cooling finned coil assembly 3 for cooling. At this point, the saturated moisture content of the airflow decreases, but the water content remains unchanged. The airflow cannot adsorb the original amount of water vapor, meaning the excess water vapor is released from the airflow, further reducing the water content. Once the airflow reaches saturation, it then passes through the heating finned coil assembly 6 for heating, increasing the saturated moisture content. At this point, the water content in the airflow is definitely unsaturated, thus reducing the air humidity. When this airflow enters the refrigerated environment, as long as the ambient temperature does not decrease, no more water will be released, achieving the effect of dehumidification and drying of the refrigerated environment. The following example uses the operating environment of a cold storage platform in Shanghai:

[0031] According to GB50736, the outdoor design dry bulb temperature in the Xujiahui area of ​​Shanghai is 34.4℃, the wet bulb temperature is 27.9℃, the temperature control requirement for the cold storage platform is 5℃, and the design temperature of a general air cooler is -2℃, the outlet temperature is 4℃, and the platform temperature is 10℃.

[0032] During the operation of the evaporative air cooler, moisture will condense from the surface of the fins. We can assume that the relative humidity of the 4°C air coming out of the cooler is 100%. Referring to section 1.6.3 of the "Practical Heating and Air Conditioning Design Manual," the moisture content of saturated air at 4°C is 5.03 g / (kg dry air), while at 10°C it is 7.63 g / (kg dry air). Therefore, after the 4°C air from the cooler is heated to 10°C, its relative humidity ф = 5.03 ÷ 7.63 = 66%, which is less than 100%. Thus, the air coming out of the cooler will not condense on the walls, ceiling, or other areas of the platform.

[0033] However, due to the high ambient temperature and relative humidity in summer, according to the investigation, the average outdoor relative humidity in the hottest month of summer in this region reaches 83%. According to the "Practical Heating and Air Conditioning Design Manual" 1.6.3, at 34℃, the moisture content of saturated humid air is 34.4g / (Kg dry air), and the air moisture content = 34.4 × 0.83 = 28.6 (Kg dry air). It can be seen that when the outside air temperature is lower than 31℃ (saturated moisture content is 28.8), water will precipitate from the air and adhere to the surface of the air cooler to form condensate.

[0034] When warm, humid outdoor air escapes from loading / unloading doors and passageways onto the platform, it mixes with the cooler air inside. To prevent condensation from forming on interior walls and ceilings when mixing air at 10°C and 66% relative humidity with air at 34°C and 83% relative humidity, the relative humidity of the mixed air needs to be below 100%. There are two methods to achieve this:

[0035] Method 1: Minimize the flow of hot and humid air into the platform area; however, it is impossible to completely seal the platform when loading and unloading goods.

[0036] Method 2: The air cooler in this patent application is used to significantly reduce the relative humidity of the air on the platform (the relative humidity of the air at 10°C on the platform is 66%), thereby increasing the moisture capacity of the air on the platform.

[0037] Specifically: The design maintains the platform temperature at 10℃, adjusts the evaporation temperature of the air cooler to -15℃, and sets the heating temperature of the dehumidifying fins to 15℃. In this way, the 10℃ air in the platform passes through the -15℃ cooling fin coil assembly, causing water to precipitate on the surface of the cooling fin coil assembly, and the temperature drops to -3℃. The relative humidity of the cold air is 100%. According to the "Practical Heating and Air Conditioning Design Manual" 1.6.3, at -3℃, the moisture content of saturated humid air is 2.94g / (Kg dry air). After passing through the 15℃ dehumidifying fin coil assembly, the temperature rises to 4℃.

[0038] Therefore, the outlet temperature of the evaporative air cooler is 4℃, the same as the outlet temperature of a typical evaporative air cooler mentioned above. However, the moisture content of the air at the outlet is reduced from 5.03g (kg dry air) to 2.94g (kg dry air). This reduces the relative humidity of the air at 10℃ after mixing with the platform air from 66% to 38.5%, significantly lowering the relative humidity of the platform air and increasing its moisture capacity, as follows:

[0039] Assume the circulating air volume of the fan is 24000 m³ / h. 3 / h;

[0040] Then the circulating air mass = 24000m 3 / h×1.24Kg / m 3 =29760Kg / h;

[0041] The original moisture capacity of the air = 29760 kg / h × (1 - 66%) × 7.63 = 77.2 kg / h;

[0042] The optimized air moisture capacity = 29760Kg / h × (1-38.5%) × 7.63 = 139.6Kg / h;

[0043] The moisture capacity is significantly increased, thus effectively preventing the possibility of condensation on the walls and ceiling of platform-type spaces.

[0044] In one embodiment of this utility model, the high-temperature gas is the hot gas discharged from the compressor unit. The exhaust end of the compressor unit is connected to the heating inlet pipe 7, which can utilize the waste heat of the compressor unit to heat the air outlet of the air cooler and reduce the relative humidity, thereby realizing waste heat utilization, environmental protection and energy saving. Preferably, a first solenoid valve is provided between the exhaust end and the heating inlet pipe 7. By controlling the opening and closing of the first solenoid valve, the waste heat supply of the compressor unit can be made continuous or interrupted. When the second solenoid valve is closed, the air cooler turns off the heating function and only turns on the cooling function. At this time, the air cooler can be used as an ordinary low-temperature air cooler. When the first solenoid valve is opened, the air cooler turns on both the cooling and heating functions at the same time. At this time, the air cooler can be used as a low-humidity air cooler, realizing the switching between multiple functions and improving the scope of application and work compatibility.

[0045] As one embodiment of this utility model, the high-temperature gas can also be generated by waste heat from other equipment, such as ethylene glycol at a certain temperature, heat transfer oil, high-temperature compressed air, etc. The dehumidification inlet pipe 7 can be connected to other equipment, which can make full use of the factory's waste heat resources, which is environmentally friendly and energy-saving, and has strong overall versatility and wide applicability.

[0046] As an embodiment of this utility model, the bottom of the housing 1 is provided with a defrosting tray 9, which can carry and collect water or ice dripping from the outside of the cooling fin coil assembly 3, preventing water or ice from accumulating in other places inside the housing 1 and providing a good working environment for the air cooler.

[0047] As one embodiment of this utility model, the defrosting disc 9 is inclined. Preferably, the lower side of the defrosting disc 9 is far away from the fan 2, which can prevent water from accumulating or remaining in the defrosting disc 9 after defrosting, thereby avoiding unnecessary damage to the defrosting disc 9 and improving the service life of the defrosting disc 9.

[0048] As one embodiment of this utility model, the defrosting disc 9 is detachable and replaceable, allowing staff to regularly disassemble the defrosting disc 9 for inspection and cleaning, which is convenient. When the defrosting disc 9 is damaged, staff can repair and replace it individually, improving work efficiency. In addition, there are multiple defrosting discs 9 with different tilt angles, allowing staff to select the defrosting disc 9 with the appropriate tilt angle according to specific usage requirements.

[0049] As one embodiment of this utility model, the bottom of the defrosting tray 9 is provided with a defrosting coil. Preferably, the defrosting coil is evenly distributed at the bottom of the housing 1. The two ends of the defrosting coil are respectively provided with a defrosting inlet pipe 91 and a defrosting outlet pipe 92. The defrosting inlet pipe 91 is connected to the exhaust end. High-temperature gas flows through the defrosting inlet pipe 91, the defrosting coil and the defrosting outlet pipe 92 in sequence to heat the defrosting tray 9. This can not only use the waste heat of the compressor unit to heat and defrost the refrigeration fin coil assembly 3, which is environmentally friendly and energy-saving, but also melt the ice accumulated in the defrosting tray 9 into water for treatment or collection, reducing the difficulty of cleaning the defrosting tray 9.

[0050] As an embodiment of this utility model, a second solenoid valve is provided between the exhaust end and the defrosting inlet pipe 91. By controlling the opening and closing of the second solenoid valve, the waste heat supply of the compressor unit can be continuous or interrupted. When it is necessary to heat the defrosting plate 9, the second solenoid valve is opened to enable the compressor unit to supply waste heat to the defrosting plate. When it is not necessary to heat the defrosting plate 9, the second solenoid valve is closed to achieve temperature control of the defrosting plate 9.

[0051] During the refrigeration process, the second solenoid valve is turned off to stop the compressor unit from supplying waste heat to the defrost inlet pipe 91, thus avoiding any impact on the refrigeration operation. During the defrosting process, the second solenoid valve is turned on to allow the compressor unit to supply waste heat to the defrost inlet pipe 91. The waste heat then enters the refrigeration finned coil assembly 3 along the defrost outlet pipe 92 and the refrigeration inlet pipe 4, thereby defrosting the refrigeration finned coil assembly 3.

[0052] In one embodiment of this utility model, the first solenoid valve and the second solenoid valve are the same. The first solenoid valve is a three-position solenoid valve or a solenoid valve with more positions. That is, by controlling the first solenoid valve to switch the mode of the air cooler, the number of solenoid valves can be effectively reduced, saving costs. For example, if the compressor unit does not supply waste heat to the heating inlet pipe 7 and the defrosting inlet pipe 91, the air cooler will start in pure cooling mode. If the compressor unit only supplies waste heat to the heating inlet pipe 7 and not to the defrosting inlet pipe 91, the air cooler will start in heating mode. If the compressor unit only supplies waste heat to the defrosting inlet pipe 91 and not to the heating inlet pipe 7, the air cooler will start in defrosting mode for the defrosting plate 9.

[0053] In one embodiment of this utility model, the defrost outlet pipe 92 is connected to the refrigeration inlet pipe 4. In defrost mode, the high-temperature gas first heats the defrost plate 9, and then heats the refrigeration finned coil assembly 3 to defrost the refrigeration finned coil assembly 3. This prevents the water formed after defrosting from refreezing in the defrost plate 9. A blocking component is provided between the defrost coil and the refrigeration inlet pipe 4. The blocking component prevents the refrigerant from flowing from the refrigeration inlet pipe 4 to the defrost coil. This ensures that the refrigerant flows only along a single route from the refrigeration inlet pipe 4 to the refrigeration outlet pipe 5 during normal refrigeration, improving the efficiency of refrigerant use, avoiding refrigerant waste caused by flowing into the defrost coil, and saving costs.

[0054] As one embodiment of this utility model, the blocking member can adopt the following two structures:

[0055] Structure 1: The blocking component is a movable partition. During the refrigeration process, the movable partition isolates the defrost outlet pipe 92 from the refrigeration inlet pipe 4 to prevent refrigerant from flowing into the defrost plate 9. During the defrosting process, the movable partition connects the defrost outlet pipe 92 with the refrigeration inlet pipe 4, allowing high-temperature gas to flow into the refrigeration finned coil assembly 3.

[0056] Structure 2: The blocking component is a first one-way valve. The inlet of the first one-way valve is connected to the defrost outlet pipe 92, and the outlet of the first one-way valve is connected to the refrigeration inlet pipe 4. That is, by setting the first one-way valve, the high-temperature gas can flow from the defrost outlet pipe 92 to the refrigeration inlet pipe 4 in one direction, and it can prevent the refrigerant from flowing from the refrigeration inlet pipe 4 to the defrost outlet pipe 92. Compared with the movable baffle, the first one-way valve does not need to be adjusted once it is set, which effectively reduces the operation steps.

[0057] As an embodiment of this utility model, a second one-way valve is provided in the refrigeration inlet pipe 4. During the defrosting process, the high-temperature gas can flow in a single direction along the defrosting outlet pipe 92, the refrigeration finned coil assembly 3, and the refrigeration outlet pipe 5, preventing the high-temperature gas from being discharged from the refrigeration inlet pipe 4 into the air cooler, so that all the high-temperature gas flows to the refrigeration finned coil assembly 3, thereby improving the utilization efficiency of the high-temperature gas.

[0058] As one embodiment of this utility model, an expansion valve is provided at the end of the refrigeration inlet pipe 4 away from the refrigeration fin coil assembly 3, which can regulate the flow rate of the refrigerant to avoid insufficient cooling due to insufficient flow rate or safety hazards due to excessive flow rate.

[0059] Refrigeration cycle: The refrigerant supplied through the expansion valve enters from the refrigeration inlet pipe 4 and then flows into the refrigeration finned coil assembly 3. It exchanges heat and dehumidifies with the air outside the coil through the refrigeration finned coil assembly 3. The refrigerant evaporates into refrigerant gas and is then discharged from the air cooler through the refrigeration outlet pipe 5.

[0060] Heating cycle: The high-temperature gas discharged from the exhaust end of the compressor unit enters through the dehumidification inlet pipe 7, and then flows into the heating finned coil group 6. It exchanges heat with the air body outside the coil through the heating finned coil group 6 to cool down. Finally, the cooled or condensed low-temperature liquid is discharged from the air cooler through the dehumidification outlet pipe 8.

[0061] Air circulation: Air enters the housing 1, passes through the cooling finned coil group 3 and the heating finned coil group 6 in sequence and exchanges heat with them, and is then drawn out by the fan 2 and discharged from the air cooler.

[0062] Defrosting cycle: The refrigeration cycle, heating cycle, and air circulation all stop. At this time, the fan 2 stops running, the refrigerant stops entering the refrigeration inlet pipe 4, and the high-temperature gas stops entering the heating inlet pipe 7. The high-temperature gas enters from the defrosting inlet pipe 91, first heating the defrosting plate 9, and then entering the refrigeration finned coil assembly 3 along the defrosting outlet pipe 92 and the refrigeration inlet pipe 4 to fully exchange heat with the ice on the outside of the coil, melting the ice into water and discharging it from the casing 1. The high-temperature gas condenses and releases heat in the refrigeration finned coil assembly 3, and finally becomes a low-temperature liquid, which is discharged through the refrigeration outlet pipe 5.

[0063] In summary, this utility model provides a evaporative air cooler that adds a heating component between the refrigeration component and the fan 2. The airflow first passes through the refrigeration component to cool down and remove moisture, and then passes through the heating component to heat up. This effectively dehumidifies and dries the environment without raising its temperature, thus reducing the relative humidity of the outlet air and keeping the environment dry while preventing condensation. The high-temperature gas first heats the defrosting plate 9 and then the refrigeration finned coil assembly 3, thereby defrosting the refrigeration finned coil assembly 3 and preventing the water formed after defrosting from refreezing in the defrosting plate 9. The blocking component prevents... The refrigerant flows from the refrigeration inlet pipe 4 to the defrosting coil, ensuring that the refrigerant flows only along a single route from the refrigeration inlet pipe 4 to the refrigeration outlet pipe 5 during normal refrigeration. This improves the efficiency of refrigerant use, avoids refrigerant flowing into the defrosting coil and causing waste, and saves costs. The waste heat of the compressor unit is used to heat and defrost the refrigeration finned coil assembly 3 and to heat the air outlet of the evaporator to reduce relative humidity, achieving waste heat utilization, which is environmentally friendly and energy-saving. The defrosting coil 9 is tilted to prevent water from accumulating or remaining in the defrosting coil 9 after defrosting, thus avoiding unnecessary damage to the defrosting coil 9 and extending its service life.

[0064] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A cold air machine characterized by, The device includes a housing (1), inside which a refrigeration assembly, a heating assembly, and a fan (2) are arranged in sequence. The refrigeration assembly includes a refrigeration finned coil assembly (3), a refrigeration inlet pipe (4), and a refrigeration outlet pipe (5). The refrigeration inlet pipe (4) is connected to the first end of the refrigeration finned coil assembly (3), and the refrigeration outlet pipe (5) is connected to the second end of the refrigeration finned coil assembly (3). The refrigerant flows sequentially through the refrigeration inlet pipe (4), the refrigeration finned coil assembly (3), and the refrigeration outlet pipe (5). The refrigeration finned coil assembly (3) is cooled down; the heating assembly includes a heating finned coil assembly (6), a heating inlet pipe (7), and a heating outlet pipe (8). The heating inlet pipe (7) is connected to the first end of the heating finned coil assembly (6), and the heating outlet pipe (8) is connected to the second end of the heating finned coil assembly (6). High-temperature gas flows through the heating inlet pipe (7), the heating finned coil assembly (6), and the heating outlet pipe (8) in sequence to heat the heating finned coil assembly (6). The air enters the housing (1), is first cooled by the cooling fin coil group (3), then heated by the heating fin coil group (6), and finally passes through the fan (2) and is discharged from the housing (1).

2. The air cooler of claim 1, wherein, The high-temperature gas is the hot gas discharged from the compressor unit. The exhaust end of the compressor unit is connected to the heating inlet pipe (7). A first solenoid valve is provided between the exhaust end and the heating inlet pipe (7).

3. The air cooler of claim 2, wherein, The bottom of the box (1) is provided with a defrosting plate (9).

4. The air cooler of claim 3, wherein, The defrosting plate (9) is set at an angle, with the lower side of the defrosting plate (9) away from the fan (2).

5. The air cooler of claim 4, wherein, The defrosting disc (9) is detachable and replaceable, and there are multiple defrosting discs (9), with different tilt angles for the multiple defrosting discs (9).

6. The air cooler of claim 3, wherein, The defrosting pan (9) is provided with a defrosting coil tube at the bottom. The defrosting coil tube is provided with a defrosting inlet pipe (91) and a defrosting outlet pipe (92) at both ends. The defrosting inlet pipe (91) is connected to the exhaust end. The high-temperature gas flows through the defrosting inlet pipe (91), the defrosting coil tube and the defrosting outlet pipe (92) in sequence to heat the defrosting pan (9).

7. The air cooler of claim 6, wherein, A second solenoid valve is provided between the exhaust end and the defrosting inlet pipe (91).

8. The air cooler of claim 6, wherein, The defrost outlet pipe (92) is connected to the refrigeration inlet pipe (4), and a blocking element is provided between the defrost coil and the refrigeration inlet pipe (4). The blocking element prevents the refrigerant from flowing from the refrigeration inlet pipe (4) to the defrost coil.

9. The air cooler of claim 8, wherein, The blocking component is a first one-way valve, the inlet of which is connected to the defrost outlet pipe (92), and the outlet of which is connected to the refrigeration inlet pipe (4).

10. The air cooler of claim 1, wherein, The refrigeration inlet pipe (4) is equipped with a second one-way valve.

Images