Quick hot fluorine defrosting air cooler evaporator

Abstract

The utility model relates to an air cooler, in particular to a rapid hot fluorine defrosting air cooler evaporator which comprises a machine shell, an evaporator coil pipe is arranged in the machine shell, a fan is further arranged on the machine shell, and the evaporator coil pipe comprises a plurality of sub coil pipes which are arranged in parallel from top to bottom. A refrigerant inlet header pipe is connected among refrigerant inlets of the plurality of sub-coils, a refrigerant outlet header pipe is connected among refrigerant outlets of the plurality of sub-coils, the refrigerant outlet header pipe is connected to a hot fluorine source through a pipeline with a valve, fluorine refers to refrigerant fluorine chlorine, any sub-coil is provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are communicated with each other. The refrigerant inlet manifold and the refrigerant outlet manifold are correspondingly connected, single-strand flowing of refrigerants is avoided, the heat exchange uniformity is improved, hot fluorine can flow through the evaporator in multiple directions during defrosting, and then the purpose of quick defrosting is achieved.

Description

Technical Field

[0001] The utility model relates to an air cooler, in particular to an evaporator of a rapid thermal fluorination defrosting air cooler. Background Art

[0002] When the air cooler is working as an evaporator at low temperature, the frost on the evaporator coil fins gradually thickens due to being in a low temperature state for a long time, thereby reducing the heat exchange efficiency of the evaporator coil. During use, it is detected that the frost layer of the air cooler is too thick, which affects the refrigeration conversion to a certain extent. The air cooler must be defrosted. The existing defrosting methods include electric heating tube heating defrosting and water defrosting. Both have obvious disadvantages: 1. Electric heating tube defrosting will waste a lot of electricity; 2. The burning phenomenon of electric heating tubes is serious; 3. The individual heating process of electric heating tubes creates a great fire hazard, which is easy to cause fire risks that cannot be solved; 4. Spraying water defrosting will waste a lot of water resources and environmental problems; 5. Water defrosting also has a large risk of water leakage; 6. Water defrosting cannot be automatically controlled, which wastes a lot of human and material resources. The shortcomings are obvious. At present, the defrosting problem of air coolers on the market is serious, and there is no good update alternative. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a fast thermal fluorine defrosting air cooler evaporator capable of achieving fast defrosting.

[0004] The utility model is realized through the following technical scheme: a rapid hot fluorine defrosting air cooler evaporator, comprising a casing, an evaporator coil is arranged in the casing, and a fan is also arranged on the casing. The evaporator coil includes a plurality of sub-coils arranged in parallel from top to bottom, a refrigerant inlet main pipe is connected between the refrigerant inlets of the plurality of sub-coils, a refrigerant outlet main pipe is connected between the refrigerant outlets of the plurality of sub-coils, and the refrigerant outlet main pipe is connected to a hot fluorine source through a pipeline with a valve.

[0005] Furthermore, the hot fluorine source is high-temperature fluorine.

[0006] Furthermore, the hot fluorine source is high-temperature fluorine that passes through a compressor, and the refrigerant inlet main pipe is connected to the outlet end of the compressor through a valve. The refrigerant inlet main pipe is connected to the inlet end of the compressor through a valve.

[0007] Furthermore, the sub-coil comprises a front inlet sub-coil with a refrigerant inlet end close to the fan side and a rear inlet sub-coil with an inlet end away from the fan.

[0008] Furthermore, an inclined water receiving tray is provided at the bottom of the casing, and a drain pipe is provided at the bottom of the water receiving tray.

[0009] Furthermore, a heat-insulating layer is provided in the water receiving tray.

[0010] The beneficial effects of the present invention are:

[0011] 1. Set up multiple sub-coils, each of which has a refrigerant inlet and a refrigerant outlet, and then connect to the corresponding refrigerant inlet and outlet main pipes to avoid single-stream flow of refrigerant, improve heat exchange efficiency, and heat uniformity of the evaporator coil. During defrosting, hot fluorine can flow evenly through the evaporator, thereby achieving the purpose of rapid defrosting;

[0012] 2. The sub-coil includes a front inlet sub-coil with the refrigerant inlet close to the fan side and a rear inlet sub-coil with the inlet end away from the fan. The front inlet sub-coil and the rear inlet sub-coil are staggered to further improve the uniformity of hot fluorine flowing through the evaporator;

[0013] 3. An inclined water tray is provided at the bottom of the casing, and a drain pipe is provided at the bottom of the water tray to quickly drain the water generated by defrosting. An insulation layer is also provided in the water tray to prevent the defrosting water from being overcooled and frozen again during the defrosting and drainage process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of Example 1;

[0015] Figure 2 Schematic diagram of fluorine flow direction under working conditions;

[0016] Figure 3 This is a schematic diagram of the fluorine flow direction in the evaporator coil under working conditions;

[0017] Figure 4 This is a schematic diagram of the fluorine flow direction in the defrosting state;

[0018] Figure 5 This is a schematic diagram of the fluorine flow direction in the evaporator coil under working conditions;

[0019] Figure 6 This is a top view of the front inlet sub-coil.

[0020] Among them: 1. Shell; 2. Fan; 3. Evaporator coil; 301. Front inlet sub-coil; 302. Rear inlet sub-coil; 303. Refrigerant outlet; 304. Refrigerant inlet; 305. Ventilation duct; 4. Refrigerant inlet main pipe; 5. Refrigerant inlet main pipe; 6. Compressor; 7. Condenser coil; 8. Valve; 9. Drain pan; 10. Insulation layer. DETAILED DESCRIPTION

[0021] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the embodiments described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0023] Example 1

[0024] like Figure 1-5 As shown, a fast thermal fluorine defrost air cooler evaporator includes a casing 1. The casing is a rectangular parallelepiped, so that more fans 2 can be arranged. A hanging seat is installed on the casing, and then it is suspended or fixed on a platform. An evaporator coil 3 is installed in the casing. In this embodiment, the evaporator coil includes a plurality of sub-coils distributed in parallel from top to bottom. The plurality of sub-coils are fixed by a support frame to form a ventilation channel 305, which cooperates with the fan. The refrigerant inlets of the plurality of sub-coils are connected to a refrigerant inlet main pipe 4, and the refrigerant outlets of the plurality of sub-coils are connected to a refrigerant outlet main pipe 5. The refrigerant inlet main pipe and the refrigerant outlet main pipe are located at the lower end of the casing and are isolated by an insulating sleeve, so as to be conveniently connected to the outdoor unit, and at the same time can reduce heat exchange. Any sub-coil has a refrigerant inlet 304 and a refrigerant outlet 303, which are then connected to the corresponding refrigerant inlet main pipe and the refrigerant outlet main pipe to avoid single-stream flow of the refrigerant and improve the heat exchange efficiency. In order to further improve the uniformity of heat exchange between the refrigerant and the evaporator coil, the sub-coil includes a front inlet sub-coil 301 with the refrigerant inlet end close to the fan side and a rear inlet sub-coil 302 with the inlet end away from the fan. The front inlet sub-coil is mostly distributed at the top, and the rear inlet sub-coil is mostly distributed at the bottom, and the inlet of the refrigerant inlet main pipe 4 is located at the lower end. During the defrosting process, hot fluorine enters the sub-coil from bottom to top, and flows from front to back when it is at the bottom, defrosting the high temperature at the front and bottom where frost is heavier, thereby ensuring the uniformity and efficiency of defrosting.

[0025] The refrigerant outlet main pipe is connected to the hot fluorine source through a pipeline. Fluorine refers to the refrigerant freon, and the hot fluorine source is high-temperature fluorine. Specifically, the hot fluorine source is high-temperature and high-pressure fluorine passed through the compressor. The refrigerant inlet main pipe is connected to the outlet end of the compressor through valve 8. The refrigerant inlet main pipe is connected to the inlet end of the compressor through a valve, and the valve is a reversing valve.

[0026] In addition, with the advancement of technology, the defrosting problem can be perfectly solved by using the hot fluorine conversion defrosting method. However, since the hot fluorine defrosting freezes too quickly and the defrosting drainage time is very short, the design requirements of the air cooler are too high. The evaporator pipes of the existing air cooler are unevenly heated during the reverse defrosting process, resulting in incomplete defrosting. Defrosting in a low-temperature environment often accumulates ice and the defrosting is not complete. The problem of complete defrosting with hot fluorine and secondary freezing of defrosting drainage cannot be solved. The problem can only be solved by connecting an external heating pipe to the bottom water receiving pan, but it also brings energy consumption and safety and stability problems of the heating process of the heating pipe. In order to solve this technical problem, an inclined water receiving pan 9 is also installed at the bottom of the casing, and a drain pipe is installed at the lowest point of the bottom of the water receiving pan, so that the water generated by defrosting can be quickly discharged. An insulation layer 10 is also installed in the water receiving pan to avoid secondary freezing of the defrost water during the defrosting drainage process.

[0027] The fast hot fluorine defrosting air cooler evaporator provided in this embodiment has the following working principle. Under normal circumstances, the air cooler system works normally. The evaporator coil outputs high-temperature and high-pressure gaseous fluorine, which is then compressed into high-temperature and high-pressure liquid fluorine by the compressor 6. After passing through the condenser coil 7, the low-temperature and low-pressure liquid fluorine is output and enters the expansion valve to output high-pressure and low-temperature gaseous fluorine for heat exchange with the evaporator coil. Due to being in a low-temperature state for a long time, condensation water on the evaporator coil defrosts, thereby reducing the heat exchange efficiency of the evaporator coil. The temperature of the gaseous fluorine is detected at the outlet of the evaporator coil. When the temperature of the gaseous fluorine at the outlet of the evaporator coil reaches a preset value, it is judged that the evaporator coil is frosted, and the defrosting is turned on. The fan of the condenser is turned off or the power is reduced. The valve is reversed so that the outlet of the compressor is connected to the refrigerant outlet main pipe, and the refrigerant inlet main pipe is connected to the inlet of the compressor. The high-temperature and high-pressure Fluorine enters the evaporator coil from the refrigerant outlet main pipe, and is then condensed by the refrigerant inlet main pipe and transported to the compressor, thereby completing the defrosting operation and achieving the purpose of rapid defrosting, and eliminating the need for additional heating devices. After the defrosting is completed, the valve is reset, the condenser fan is turned on, and the air cooler system resumes normal operation. During the defrosting process, the compressor increases the internal energy of the fluorine, which is then converted into heat energy for defrosting. In particular, the sub-coil includes a front inlet sub-coil 301 with the refrigerant inlet end close to the fan side and a rear inlet sub-coil 302 with the inlet end away from the fan. The front inlet sub-coil is mostly distributed at the top, and the rear inlet sub-coil is mostly distributed at the bottom, and the inlet of the refrigerant inlet main pipe 4 is located at the lower end. During the defrosting process, hot fluorine enters the sub-coil from bottom to top, and flows from front to back when at the bottom, defrosting the high temperature at the front and lower parts with heavier frost, thereby ensuring the uniformity and efficiency of defrosting.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rapid thermal defrosting air cooler evaporator, comprising a housing, an evaporator coil disposed within the housing, and a fan disposed on the housing, characterized in that: The evaporator coil includes multiple sub-coils arranged in parallel from top to bottom, the refrigerant inlets of the multiple sub-coils are connected to a refrigerant inlet main pipe, the refrigerant outlets of the multiple sub-coils are connected to a refrigerant outlet main pipe, and the refrigerant outlet main pipe is connected to a hot fluorine source through a pipe with a valve.

2. The rapid thermal defrosting air cooler evaporator according to claim 1, characterized in that: The hot fluorine source is high-temperature fluorine.

3. The rapid thermal defrosting air cooler evaporator according to claim 2, characterized in that: The hot fluorine source is high-temperature fluorine that passes through a compressor. The refrigerant inlet main pipe is connected to the outlet end of the compressor through a valve. The refrigerant inlet main pipe is connected to the inlet end of the compressor through a valve.

4. The rapid thermal defrosting air cooler evaporator according to claim 1, characterized in that: The sub-coil comprises a front inlet sub-coil with a refrigerant inlet end close to the fan side and a rear inlet sub-coil with an inlet end away from the fan.

5. The rapid thermal defrosting air cooler evaporator according to claim 1, characterized in that: An inclined water receiving tray is also provided at the bottom of the casing, and a drain pipe is provided at the bottom of the water receiving tray.

6. The rapid thermal defrosting air cooler evaporator according to claim 5, characterized in that: A heat-insulating layer is also provided in the water receiving tray.

Images