Hot fluorine defrosting system for laboratory

Abstract

The utility model discloses a hot fluorine defrosting system for a laboratory, which comprises a shell and tube condenser, a compressor, an indoor evaporator and an outdoor evaporator, and a hot fluorine defrosting mechanism is arranged among the shell and tube condenser, the compressor, the indoor evaporator and the outdoor evaporator. The hot fluorine defrosting mechanism comprises a liquid supply pipeline which is installed on one side of the shell and tube condenser and connected with the indoor evaporator and the outdoor evaporator, and a first automatic ball valve is installed on the liquid supply pipeline. Relates to the technical field of enthalpy difference laboratories. According to the hot fluorine defrosting system for the laboratory, due to the arrangement of the hot fluorine defrosting mechanism, the shell and tube condenser of the system does not participate in work during defrosting, the outdoor evaporator is used for condensation instead of the shell and tube condenser, heat of an indoor test room is carried to the outdoor evaporator by the whole system, and the heat of the indoor test room is saved. A large amount of condensation heat is released to the outdoor evaporator, defrosting is thorough and rapid, the temperature rise of a room is extremely small, the defects that in a traditional defrosting mode, defrosting is not thorough, and consumed time is long are overcome, and the purpose of rapid defrosting is achieved.

Description

Technical Field

[0001] This utility model relates to the field of enthalpy difference laboratory technology, specifically a laboratory hot fluorine defrosting system. Background Technology

[0002] The majority of heating conditions in the enthalpy difference laboratory are low-temperature, high-humidity conditions, such as dry-bulb temperature of 2°C and wet-bulb temperature of 1°C, or dry-bulb temperature of 0°C and 100% humidity. These conditions are not only prone to frosting but also last for extended periods. Because most heating conditions are in the low-temperature range, researchers often group them together for testing purposes. While this method improves experimental efficiency, rapid frosting of the outdoor evaporator leads to a rapid decrease in compressor efficiency and can even cause significant liquid backflow, resulting in compressor liquid slugging damage.

[0003] Most existing laboratories use defrosting methods such as water defrosting, hot gas defrosting, electric defrosting, and artificial heating defrosting to defrost outdoor evaporators. However, these defrosting methods not only affect the humidity in the laboratory, making it difficult to control the humidity within the required range, but also make the defrosting process very long, reducing the efficiency of the experiment. Utility Model Content

[0004] The purpose of this invention is to provide a laboratory hot fluorine defrosting system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a laboratory hot refrigerant defrosting system, comprising a shell-and-tube condenser, a compressor, an indoor evaporator, and an outdoor evaporator. A hot refrigerant defrosting mechanism is provided between the shell-and-tube condenser, the compressor, the indoor evaporator, and the outdoor evaporator. The hot refrigerant defrosting mechanism includes a liquid supply pipeline installed on one side of the shell-and-tube condenser and connected to the indoor and outdoor evaporators. A first automatic ball valve is fixedly installed on the liquid supply pipeline. A connection to the compressor is installed on one side of the outdoor evaporator. A first return gas line is provided, and a second return gas line is installed on the first return gas line. A second automatic ball valve and a third automatic ball valve are respectively installed on the first return gas line and the second return gas line. A third return gas line is installed on one side of the compressor and connected to the shell and tube condenser and the first return gas line. A fourth automatic ball valve and a pressure regulating valve are installed on the third return gas line. A high-temperature electronic expansion valve is installed on one side of the compressor and the indoor evaporator, and a check valve is installed on the side of the liquid supply line near the outdoor evaporator.

[0006] As a further embodiment of this utility model: a first flange is fixedly installed on the surface of the shell-and-tube condenser, the compressor, the indoor evaporator, and the outdoor evaporator; a second flange is fixedly installed on the liquid supply pipeline, the first return gas pipeline, and the third return gas pipeline; and a bellows is installed between the first flange and the second flange.

[0007] As a further embodiment of this utility model: an adjusting rod is fixedly installed on both sides of the first flange, and an adjusting block that is movably connected to the adjusting rod is fixedly installed on both sides of the second flange. Bolts are installed on the adjusting blocks, and multiple threaded grooves are evenly opened on one side of the adjusting rod.

[0008] As a further improvement of this utility model: a support base is fixedly installed at the bottom of the outdoor evaporator, a collection box is slidably installed on the support base, and multiple drainage grooves are provided on the outdoor evaporator.

[0009] As a further embodiment of this utility model: a fixing plate is fixedly installed on one side of the support base, a spring is fixedly installed on one side of the fixing plate, a limiting rod penetrating the fixing plate is installed at one end of the spring, and a limiting block is fixedly installed on one side of the collection box.

[0010] As a further improvement of this utility model, the diameter of one end of the limiting rod matches the inner diameter of the slot on the limiting block.

[0011] As a further improvement of this utility model: the top of the collection box is provided with multiple sliding grooves, and two cover plates are slidably installed between two of the sliding grooves.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model provides a laboratory hot refrigerant defrosting system. By setting up a hot refrigerant defrosting mechanism, the shell and tube condenser of the system no longer participates in the defrosting process. Instead, the outdoor evaporator is used for condensation. The entire system transfers the heat from the indoor test room to the outdoor evaporator. A large amount of condensation heat is released onto the outdoor evaporator, resulting in thorough and rapid defrosting with minimal room temperature rise. This solves the shortcomings of traditional defrosting methods, such as incomplete defrosting and long defrosting time, and achieves the goal of rapid defrosting. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the corrugated pipe structure in an embodiment of this utility model;

[0016] Figure 3This is a schematic diagram of the bottom structure of the outdoor evaporator in an embodiment of this utility model;

[0017] Figure 4 This is a schematic diagram showing the unfolded structure of the limiting rod and limiting block in an embodiment of this utility model;

[0018] In the diagram: 1. Shell and tube condenser; 2. Compressor; 3. Indoor evaporator; 4. Outdoor evaporator; 5. Hot refrigerant defrosting mechanism; 6. Liquid supply line; 7. First automatic ball valve; 8. First return gas line; 9. Second return gas line; 10. Second automatic ball valve; 11. Third automatic ball valve; 12. Third return gas line; 13. Fourth automatic ball valve; 14. Pressure regulating valve; 15. High-temperature electronic expansion valve; 16. Check valve; 17. First flange; 18. Second flange; 19. Bellows; 20. Adjusting rod; 21. Adjusting block; 22. Bolt; 23. Threaded groove; 24. Support base; 25. Collection box; 26. Drainage trough; 27. Fixing plate; 28. Spring; 29. ​​Limiting rod; 30. Limiting block; 31. Slide groove; 32. Cover plate. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, a laboratory hot refrigerant defrosting system for this utility model includes a shell-and-tube condenser 1, a compressor 2, an indoor evaporator 3, and an outdoor evaporator 4. A hot refrigerant defrosting mechanism 5 is provided between the shell-and-tube condenser 1, the compressor 2, the indoor evaporator 3, and the outdoor evaporator 4. The hot refrigerant defrosting mechanism 5 includes a liquid supply line 6 installed on one side of the shell-and-tube condenser 1 and connected to the indoor evaporator 3 and the outdoor evaporator 4. A first automatic ball valve 7 is fixedly installed on the liquid supply line 6. A first return gas line 8 connected to the compressor 2 is installed on one side of the outdoor evaporator 4. A second return gas line 9 is installed on the first return gas line 8. A second automatic ball valve 10 and a third automatic ball valve 11 are respectively installed on the first return gas line 8 and the second return gas line 9. A third return gas line 12 is installed on one side of the compressor 2, connecting to the shell and tube condenser 1 and the first return gas line 8. A fourth automatic ball valve 13 and a pressure regulating valve 14 are installed on the third return gas line 12. A high-temperature electronic expansion valve 15 is installed on one side of the compressor 2 and the indoor evaporator 3, and a check valve 16 is installed on the side of the liquid supply line 6 near the outdoor evaporator 4. With the setting of the hot refrigerant defrosting mechanism 5, the shell and tube condenser 1 of the system no longer participates in the defrosting process. Instead, the outdoor evaporator 4 is used for condensation. The entire system transfers the heat from the indoor test room to the outdoor evaporator 4. A large amount of condensation heat is released onto the outdoor evaporator 4, resulting in thorough and rapid defrosting with minimal room temperature rise. This solves the shortcomings of traditional defrosting methods, such as incomplete defrosting and long defrosting time, achieving the goal of rapid defrosting.

[0021] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4As another embodiment of this utility model: a first flange 17 is fixedly installed on the surface of the shell-and-tube condenser 1, the compressor 2, the indoor evaporator 3, and the outdoor evaporator 4; a second flange 18 is fixedly installed on the liquid supply line 6, the first return gas line 8, and the third return gas line 12; a bellows 19 is installed between the first flange 17 and the second flange 18; an adjusting rod 20 is fixedly installed on both sides of the first flange 17; an adjusting block 21 movably connected to the adjusting rod 20 is fixedly installed on both sides of the second flange 18; bolts 22 are installed on the adjusting block 21; multiple threaded grooves 23 are evenly opened on one side of the adjusting rod 20; a support base 24 is fixedly installed at the bottom of the outdoor evaporator 4; a collection box 25 is slidably installed on the support base 24; and multiple drainage grooves 26 are opened on the outdoor evaporator 4. When gas is transported to the liquid supply line 6, the first return gas line 8, and the third return gas line 12 through the shell-and-tube condenser 1, the regulating rod 20, the indoor evaporator 3, and the outdoor evaporator 4, vibrations will occur. When the first flange 17, the second flange 18, and the bellows 19 are installed at the connection, the vibrations caused by gas transportation can be buffered to prevent the liquid supply line 6, the first return gas line 8, and the fourth automatic ball valve 13 from breaking due to vibration. The length of the bellows 19 can be adjusted by the regulating rod 20, the regulating block 21, the bolt 22, and the threaded groove 23. The position of the second flange 18 can be changed by pushing the regulating block 21 to slide on the regulating rod 20 to adjust the length of the bellows 19. After adjustment, the bolt 22 is connected to the threaded groove 23 for fixation. After changing the length of the bellows 19, the buffering strength can be adjusted. The wastewater formed during defrosting of the outdoor evaporator 4 can be collected by the support 24, the collection box 25, and the drain trough 26 to avoid environmental pollution.

[0022] like Figures 1-4As shown, as a further embodiment of this utility model: a fixing plate 27 is fixedly installed on one side of the support base 24, a spring 28 is fixedly installed on one side of the fixing plate 27, a limiting rod 29 that penetrates the fixing plate 27 is installed at one end of the spring 28, a limiting block 30 is fixedly installed on one side of the collection box 25, the diameter of one end of the limiting rod 29 matches the inner diameter of the slot on the limiting block 30, and a plurality of sliding grooves 31 are opened on the top of the collection box 25, and two cover plates 32 are slidably installed between two sliding grooves 31. With the setting of the fixing plate 27, spring 28, limiting rod 29 and limiting block 30, since the collection box 25 is slidably installed in the support base 24, by inserting one end of the limiting rod 29 into the limiting block 30 and relying on the spring 28 for support, the collection box 25 can be limited, preventing the collection box 25 from sliding off the support base 24. At the same time, by setting the diameter of one end of the limiting rod 29 to match the inner diameter of the limiting block 30, the stability of the limit can be further improved, preventing loosening. With the setting of the sliding groove 31 and the cover plate 32, when the collection box 25 is pulled out from the support base 24, the wastewater in the collection box 25 will splash outward under the force. After the two cover plates 32 are slidably covered on the collection box 25, the wastewater in it can be sealed and covered, thereby preventing the wastewater from splashing outward when it is taken out.

[0023] The working principle of this utility model is as follows: The laboratory hot-fluid defrosting system provided by this utility model operates normally with the first automatic ball valve 7 open, and either the second automatic ball valve 10 or the third automatic ball valve 11 open. The system functions as a refrigeration system, simultaneously supplying cooling to both the indoor evaporator 3 and the outdoor evaporator 4. When defrosting mode is activated, the first automatic ball valve 7 closes, the second automatic ball valve 10 and the third automatic ball valve 11 close, and the fourth automatic ball valve 13 opens. The compressor 2 discharges heat from the fourth automatic ball valve 13 into the outdoor evaporator 4, where it is condensed. The condensed liquid refrigerant enters the liquid supply line 6 via the check valve 16 and is then throttled by the high-temperature electronic expansion valve 15 before entering the indoor evaporator 3 for evaporation and cooling. The evaporated gaseous refrigerant is then drawn into the compressor 2 and compressed, repeating the cycle. During defrosting, the shell-and-tube condenser 1 no longer operates; instead, the outdoor evaporator 4 is used as the condenser. The system transfers heat from the indoor testing room to the outdoor evaporator 4, achieving rapid defrosting.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A laboratory-grade hot fluorine defrosting system, characterized in that, It includes a shell and tube condenser (1), a compressor (2), an indoor evaporator (3), and an outdoor evaporator (4); A hot refrigerant defrosting mechanism (5) is provided between the shell-and-tube condenser (1), the compressor (2), the indoor evaporator (3), and the outdoor evaporator (4). The hot-fluid defrosting mechanism (5) includes a liquid supply line (6) installed on one side of the shell-and-tube condenser (1) and connected to the indoor evaporator (3) and the outdoor evaporator (4). A first automatic ball valve (7) is fixedly installed on the liquid supply line (6). A first return gas line (8) connected to the compressor (2) is installed on one side of the outdoor evaporator (4). A second return gas line (9) is installed on the first return gas line (8). A second automatic ball valve (10) is installed on the first return gas line (8) and the second return gas line (9). The compressor (2) is equipped with a third automatic ball valve (11), and a third return gas pipeline (12) connected to the shell and tube condenser (1) and the first return gas pipeline (8) is installed on one side of the compressor (2). A fourth automatic ball valve (13) and a pressure regulating valve (14) are installed on the third return gas pipeline (12). A high-temperature electronic expansion valve (15) is installed on one side of the compressor (2) and the indoor evaporator (3). A check valve (16) is installed on the side of the liquid supply pipeline (6) near the outdoor evaporator (4).

2. The laboratory hot fluorine defrosting system according to claim 1, characterized in that, The shell-and-tube condenser (1), the compressor (2), the indoor evaporator (3) and the outdoor evaporator (4) are all fixedly mounted with a first flange (17), and a second flange (18) is fixedly mounted on the liquid supply line (6), the first return gas line (8) and the third return gas line (12). A bellows (19) is installed between the first flange (17) and the second flange (18).

3. A laboratory hot fluorine defrosting system according to claim 2, characterized in that, Adjusting rods (20) are fixedly installed on both sides of the first flange (17), and adjusting blocks (21) that are movably connected to the adjusting rods (20) are fixedly installed on both sides of the second flange (18). Bolts (22) are installed on the adjusting blocks (21), and multiple threaded grooves (23) are evenly opened on one side of the adjusting rods (20).

4. A laboratory hot fluorine defrosting system according to claim 3, characterized in that, The bottom of the outdoor evaporator (4) is fixedly installed with a support base (24), and a collection box (25) is slidably installed on the support base (24). Multiple drainage grooves (26) are provided on the outdoor evaporator (4).

5. A laboratory hot fluorine defrosting system according to claim 4, characterized in that, A fixing plate (27) is fixedly installed on one side of the support base (24), a spring (28) is fixedly installed on one side of the fixing plate (27), a limiting rod (29) that penetrates the fixing plate (27) is installed at one end of the spring (28), and a limiting block (30) is fixedly installed on one side of the collection box (25).

6. A laboratory hot fluorine defrosting system according to claim 5, characterized in that, The diameter of one end of the limiting rod (29) matches the inner diameter of the slot on the limiting block (30).

7. A laboratory hot fluorine defrosting system according to claim 6, characterized in that: The top of the collection box (25) is provided with multiple grooves (31), and two cover plates (32) are slidably installed between two of the grooves (31).

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