Fresh meat cabinet hot fluorine defrosting system

Abstract

The utility model discloses a kind of fresh meat cabinet hot fluorine defrosting systems, belong to fresh meat cabinet defrosting technical field, including compressor, the exhaust pipe one end of compressor is connected at oil separator air inlet pipe, the air outlet pipe one end of oil separator is connected with four-way reversing valve, the output end of four-way reversing valve is connected with air-cooled heat exchanger, the air outlet end of air-cooled heat exchanger is connected with check valve group, the output end of check valve group is connected in liquid accumulator input end, the output end of liquid accumulator is connected with filter, and the one end of filter is connected with expansion valve;The utility model is realized high-pressure refrigerant gas reverse flow by setting four-way valve, equipment high-efficiency energy saving: defrosting work can be realized using system's own operation waste heat, compared with electric heating tube defrosting, save a large amount of electric energy, heat is directly conducted from evaporator coil inside, efficiency is high, defrosting time is short, and heat is concentrated in evaporator part, the temperature influence to the article stored in refrigerator interior is less, it is favorable to keep article quality.

Description

Technical Field

[0001] This utility model belongs to the field of defrosting technology for fresh meat display cases, and specifically relates to a thermal defrosting system for fresh meat display cases. Background Technology

[0002] Fresh meat display cases are commercial refrigerated cabinets specifically designed for displaying and refrigerating fresh meat. They are mainly divided into two types: air-cooled open type and direct-cooled curved glass-lid type. They maintain the internal temperature at 2-8℃ through an intelligent temperature control system and employ preservation technology to inhibit bacterial activity and extend shelf life. The open design facilitates food display, and the cabinet body is primarily made of stainless steel with a powder-coated zinc-coated steel sheet exterior, combining corrosion resistance with aesthetic appeal.

[0003] Current fresh meat display cases on the market use the traditional "electric heating element defrosting" method. This involves installing an electric heating element next to the evaporator. When defrosting is needed, the compressor stops, and the heating element is powered on, melting the frost like an oven. The electric heating element directly consumes a large amount of electrical energy to generate heat, and the intense heating can cause the evaporator coil and surrounding area to overheat, affecting food quality and system lifespan.

[0004] In view of this, a hot fluorinated defrosting system for fresh meat display cases is designed to solve the above problems. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a hot fluorinated defrosting system for fresh meat display cases, characterized by high efficiency, energy saving, and minimal temperature fluctuations.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hot defrosting system for a fresh meat display case, comprising a compressor, one end of the compressor's exhaust pipe connected to the inlet pipe of an oil separator, one end of the oil separator's outlet pipe connected to a four-way reversing valve, the output end of the four-way reversing valve connected to an air-cooled heat exchanger, the outlet end of the air-cooled heat exchanger connected to a one-way valve assembly, the output end of the one-way valve assembly connected to the input end of a liquid receiver, the output end of the liquid receiver connected to a filter, one end of the filter connected to an expansion valve, the output end of the expansion valve connected to one end of a second shut-off valve via the one-way valve assembly, the other end of the second shut-off valve connected to one end of an evaporator, the output end of the four-way reversing valve also connected to a gas-liquid separator, the output end of the gas-liquid separator connected to the inlet end of the compressor, and one shut-off valve corresponding to the output end of the four-way reversing valve on one end of the evaporator.

[0007] Preferably, a capillary connecting tube is provided between the expansion valve and the one-way valve assembly.

[0008] Preferably, the four-way reversing valve includes a solenoid valve, a four-way valve body, and a connecting pipe 1. The outlet pipe of the oil separator is connected to the connecting pipe 1. The solenoid valve is fixed on one side surface of the four-way valve body. A connecting pipe 2 is installed on the upper part of the other side surface of the four-way valve body. A connecting pipe 3 is installed in the middle of the side of the four-way valve body near the connecting pipe 2. A connecting pipe 4 is installed at the bottom end of the side surface of the four-way valve body near the connecting pipe 2. A solenoid valve is also installed on the surface of the four-way valve body. One end of the solenoid valve is connected to a capillary tube 1 corresponding to the connecting pipe 1. A capillary tube 2 is connected to the side of the solenoid valve surface away from the capillary tube 1. A capillary tube 3 is provided on one side of the capillary tube 2. A capillary tube 4 is provided on one side of the capillary tube 3.

[0009] Preferably, capillary tube two is connected to the air inlet at one end of the four-way valve body, capillary tube four is connected to the air inlet at the other end of the four-way valve body, and capillary tube three is connected to the outer wall of the four-way valve body.

[0010] Preferably, the fourth connecting pipe is connected to the air inlet of the air-cooled heat exchanger, the third connecting pipe is connected to the input end of the gas-liquid separator, and the second connecting pipe is connected to the first shut-off valve.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention achieves reverse flow of high-pressure refrigerant gas by setting a four-way valve, making the equipment highly efficient and energy-saving. Defrosting can be achieved using the system's own residual heat, saving a significant amount of energy compared to electric heating tube defrosting. Heat is directly conducted from inside the evaporator coil, resulting in high efficiency, short defrosting time, and concentrated heat in the evaporator area, minimizing the impact on the temperature of items stored inside the freezer, thus helping to maintain the quality of the items. The defrosting process is gentle, avoiding potential damage to the evaporator and refrigeration system caused by localized overheating of the electric heating tube. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the control system of this utility model;

[0014] Figure 2 This is a schematic diagram of the four-way reversing valve structure of this utility model.

[0015] In the diagram: 1. Compressor; 2. Oil separator; 3. Four-way reversing valve; 31. Solenoid valve; 32. Capillary tube 1; 33. Capillary tube 2; 34. Capillary tube 3; 35. Capillary tube 4; 36. Four-way valve body; 37. Connecting pipe 2; 38. Connecting pipe 3; 39. Connecting pipe 4; 310. Connecting pipe 1; 4. Liquid receiver; 5. Check valve assembly; 6. Air-cooled heat exchanger; 7. Expansion valve; 8. Capillary connecting pipe; 9. Filter; 10. Evaporator; 11. Shut-off valve 1; 12. Gas-liquid separator; 13. Shut-off valve 2. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1: Please refer to Figure 1-2 This utility model provides the following technical solution: a hot defrosting system for a fresh meat display case, including a compressor 1, one end of the exhaust pipe of the compressor 1 is connected to the inlet pipe of an oil separator 2, one end of the outlet pipe of the oil separator 2 is connected to a four-way reversing valve 3, the output end of the four-way reversing valve 3 is connected to an air-cooled heat exchanger 6, the outlet end of the air-cooled heat exchanger 6 is connected to a one-way valve group 5, the output end of the one-way valve group 5 is connected to the input end of a liquid receiver 4, the output end of the liquid receiver 4 is connected to a filter 9, one end of the filter 9 is connected to an expansion valve 7, the output end of the expansion valve 7 is connected to one end of a second shut-off valve 13 through the one-way valve group 5, the other end of the second shut-off valve 13 is connected to one end of an evaporator 10, the output end of the four-way reversing valve 3 is also connected to a gas-liquid separator 12, the output end of the gas-liquid separator 12 is connected to the inlet end of the compressor 1, and one end of the evaporator 10 is also provided with a first shut-off valve 11 corresponding to the output end of the four-way reversing valve 3.

[0018] Specifically, a capillary connecting tube 8 is provided between the expansion valve 7 and the one-way valve group 5.

[0019] By adopting the above technical solution, it is ensured that high-pressure refrigeration gas can flow through the capillary connecting tube 8.

[0020] Specifically, the four-way directional valve 3 includes a solenoid valve 31, a four-way valve body 36, and a connecting pipe 1 310. The outlet pipe of the oil separator 2 is connected to the connecting pipe 1 310. The solenoid valve 31 is fixed on one side of the four-way valve body 36. A connecting pipe 2 37 is installed on the upper part of the other side of the four-way valve body 36. A connecting pipe 38 is installed in the middle of the side of the four-way valve body 36 near the connecting pipe 2 37. A connecting pipe 4 39 is installed at the bottom of the side of the four-way valve body 36 near the connecting pipe 2 37. The surface of the four-way valve body 36 is also equipped with a solenoid valve 31. One end of the solenoid valve 31 is connected to a capillary tube 1 32 corresponding to the connecting pipe 1 310. A capillary tube 2 33 is connected to the side of the surface of the solenoid valve 31 away from the capillary tube 1 32. A capillary tube 34 is provided on one side of the capillary tube 2 33. A capillary tube 4 35 is provided on one side of the capillary tube 34.

[0021] By adopting the above technical solution, when the four-way reversing valve 3 is energized, the solenoid valve 31 is powered on and its internal iron core drives the valve bowl to move, so that capillary tube 1 32 and capillary tube 2 33 are connected, and capillary tube 34 and capillary tube 4 35 are connected. Since capillary tube 1 32 and capillary tube 2 33 are connected to the exhaust pipe of compressor 1, they are filled with high-pressure gas to form a high-pressure area, while capillary tube 34 and capillary tube 4 35 are connected to the suction pipe of compressor 1 to form a low-pressure area. At this time, the piston inside the four-way valve body 36 moves under the action of pressure, so that connecting pipe 2 37 is connected to connecting pipe 1 310. The high-pressure refrigerant gas in connecting pipe 1 310 enters the evaporator 10 through connecting pipe 2 37. The high-pressure refrigerant gas then enters the air-cooled heat exchanger 6 through capillary connecting pipe 8, and then enters connecting pipe 38 through connecting pipe 4 39, and finally returns to compressor 1 to complete the heating cycle.

[0022] Specifically, capillary tube 2 33 is connected to the air inlet at one end of the four-way valve body 36, capillary tube 4 35 is connected to the air inlet at the other end of the four-way valve body 36, and capillary tube 3 34 is connected to the outer wall of the four-way valve body 36.

[0023] By adopting the above technical solution, it is ensured that the solenoid valve 31 can connect different capillaries when switching states, thereby completing the adjustment work.

[0024] Specifically, connecting pipe 4 39 is connected to the air inlet of the air-cooled heat exchanger 6, connecting pipe 3 38 is connected to the input of the gas-liquid separator 12, and connecting pipe 2 37 is connected to the shut-off valve 11.

[0025] By adopting the above technical solution, it is ensured that when the four-way reversing valve 3 is energized, different connecting pipes can be directly connected, thereby realizing the change of different flow directions of high-pressure refrigeration gas.

[0026] The working principle and usage process of this utility model: When this utility model is used in a fresh meat display case, the defrosting process is controlled by a timer or a "defrosting sensor" installed inside. When the evaporator 10 runs for a preset time, or when the defrosting sensor detects that the frost layer thickness reaches the set trigger standard, the controller issues a command to start defrosting. At this time, the normal refrigeration path is cut off: the compressor 1 stops working, the fan stops, and then the controller energizes the four-way reversing valve 3. The solenoid valve 31 is powered on, and its internal iron core moves the valve bowl, connecting capillary tube 1 32 and capillary tube 2 33, and connecting capillary tube 34 and capillary tube 4 35. Because capillary tube 1 32 and capillary tube 2 33 are connected to the compressor 1, the normal refrigeration path is cut off. The compressor 1 exhaust pipe is connected and filled with high-pressure gas to form a high-pressure zone. Capillary tubes 34 and 45 are connected to the compressor 1 suction pipe to form a low-pressure zone. At this time, the piston inside the four-way valve body 36 moves under the action of pressure, so that the connecting pipe 2 37 is connected to the connecting pipe 1 310. The high-pressure refrigerant gas in the connecting pipe 1 310 enters the evaporator 10 through the connecting pipe 2 37. At this time, the high-temperature refrigerant vapor flows in the coil of the evaporator 10. Since its temperature is much higher than the freezing point, it will release a lot of heat to the frost layer on the outside through the metal pipe wall. The heat is directly transferred to the root of the frost. The frost will melt and fall off quickly from the inside to the outside and from the root to the surface. The melted frost water flows to the water collection pan through the drain pipe.

[0027] When the defrost sensor detects that the coil temperature of the evaporator 10 has risen to the preset value or reached the preset defrost time, the defrost process ends. The high-pressure refrigerant gas then enters the air-cooled heat exchanger 6 through the capillary connecting tube 8, then enters the connecting tube 38 through the connecting tube 4 39, and finally returns to the compressor 1 to complete the heating cycle. After the defrost work is completed, the four-way reversing valve 3 is de-energized, the solenoid valve 31 is reset, and the system resumes the normal refrigeration cycle until the next defrost cycle begins.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot defrosting system for a fresh meat display case, comprising a compressor (1), characterized in that: One end of the exhaust pipe of the compressor (1) is connected to the inlet pipe of the oil separator (2). One end of the outlet pipe of the oil separator (2) is connected to a four-way reversing valve (3). The output end of the four-way reversing valve (3) is connected to an air-cooled heat exchanger (6). The outlet end of the air-cooled heat exchanger (6) is connected to a one-way valve assembly (5). The output end of the one-way valve assembly (5) is connected to the input end of the liquid receiver (4). The output end of the liquid receiver (4) is connected to a filter (9). One end of the filter (9) is connected to... An expansion valve (7) is connected to one end of a stop valve (13) via a check valve assembly (5). The other end of the stop valve (13) is connected to one end of an evaporator (10). The output end of a four-way reversing valve (3) is also connected to a gas-liquid separator (12). The output end of the gas-liquid separator (12) is connected to the inlet of a compressor (1). One end of an evaporator (10) is also equipped with a stop valve (11) corresponding to the output end of the four-way reversing valve (3).

2. The hot fluorinated defrosting system for a fresh meat display case according to claim 1, characterized in that: A capillary connecting tube (8) is provided between the expansion valve (7) and the one-way valve group (5).

3. The hot fluorinated defrosting system for a fresh meat display case according to claim 1, characterized in that: The four-way reversing valve (3) includes a solenoid valve (31), a four-way valve body (36), and a connecting pipe one (310). The vent pipe of the oil separator (2) is connected to the connecting pipe one (310). The solenoid valve (31) is fixed to one side surface of the four-way valve body (36). A connecting pipe two (37) is installed on the upper part of the other side surface of the four-way valve body (36). A connecting pipe three (38) is installed in the middle of the side of the four-way valve body (36) near the connecting pipe two (37). The four-way valve body (36) is close to... Connecting pipe four (39) is installed at the bottom end of the surface near the second connecting pipe (37). Solenoid valve (31) is also installed on the surface of the four-way valve body (36). One end of the solenoid valve (31) is connected to capillary tube one (32) corresponding to the first connecting pipe (310). Capillary tube two (33) is connected to the side of the surface of the solenoid valve (31) away from capillary tube one (32). Capillary tube three (34) is provided on one side of capillary tube two (33), and capillary tube four (35) is provided on one side of capillary tube three (34).

4. The hot fluorinated defrosting system for a fresh meat display case according to claim 3, characterized in that: The second capillary tube (33) is connected to the air inlet at one end of the four-way valve body (36), the fourth capillary tube (35) is connected to the air inlet at the other end of the four-way valve body (36), and the third capillary tube (34) is connected to the outer wall of the four-way valve body (36).

5. The hot fluorinated defrosting system for a fresh meat display case according to claim 3, characterized in that: The fourth connecting pipe (39) is connected to the air inlet of the air-cooled heat exchanger (6), the third connecting pipe (38) is connected to the input end of the gas-liquid separator (12), and the second connecting pipe (37) is connected to the first shut-off valve (11).

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