Refrigeration evaporator online control device and method based on capillary oil supply

Abstract

The present invention discloses an online control device and method for a refrigeration evaporator based on capillary oil supply. The device and method have a structure including a compressor, a centrifugal oil separator, a condenser, an expansion valve, and a capillary oil supply evaporator. A centrifugal oil separator is connected between the compressor and the condenser. The capillary oil supply evaporator includes an oil supply tank, an inlet pipe, a movable path, an outlet pipe, and a copper roller. The inlet pipe is connected to the outlet pipe. During the rotation of the heat absorbing wheel, the flexible metal felt, under the elastic support of spring steel, continuously and evenly coats PFPE oil on the surface of the heat absorbing wheel. This lubrication method can ensure the efficient heat conduction performance of the heat absorbing wheel without affecting the transportation of PVC composite plastic tiles due to the adhesion of the oil film. At the same time, the coating of PFPE oil effectively prevents frost on the surface of the heat absorbing wheel, ensuring a continuous and stable heat absorption effect. The micro-grooves designed on the surface of the heat absorbing wheel can automatically recover excess lubricating oil, realize the recycling of oil, maintain the optimal lubrication state, and avoid oil waste.

Description

Technical Field

[0001] The present invention belongs to the field of refrigeration, and more specifically, relates to an online control device and method for a refrigeration evaporator based on capillary oil supply. Background Art

[0002] The evaporator of a refrigerator is one of the core components of the refrigeration system. It is mainly used to absorb external heat to achieve cooling. Its working principle is to achieve the purpose of cooling by absorbing the heat of the surrounding medium such as air or water through the low-pressure evaporation of the refrigerant in the evaporator. It is a key link in the low-temperature heat exchange in the refrigeration cycle.

[0003] During the low-temperature fixed transportation of materials by the evaporator, due to the significant temperature difference between the evaporator surface and the material, a large amount of water vapor will condense on the evaporator's cooling surface and form a frost layer, which can easily cause frost accumulation and reduce heat conduction efficiency; increase contact surface friction resistance; affect the smoothness of material transportation; and cause the energy efficiency of the refrigeration system to decrease. This frosting problem will directly affect the operating stability of the production line and the consistency of product quality. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, the purpose and efficacy of the online control device and method of the refrigeration evaporator based on capillary oil supply of the present invention are achieved by the following specific technical means:

[0005] Its structure includes a compressor, a centrifugal oil separator, a condenser, an expansion valve, and a capillary oil supply evaporator. The centrifugal oil separator is connected between the compressor and the condenser, and the expansion valve vaporizes the liquid and transports it to the capillary oil supply evaporator.

[0006] The capillary oil supply evaporator includes an oil supply box, an inlet pipe, a movable channel, an outlet pipe, and a copper roller. The inlet pipe is connected to the outlet pipe, the oil supply box is located in a groove of the movable channel and is movable, and the copper roller is connected to the inlet pipe.

[0007] The copper roller includes a heat conduction chamber, a heat absorbing wheel, a rolling frame, and a rotating seat. The heat conduction chamber is located between the rolling frame and the outlet pipe. The rotating seat is fixed to the outer surface of the outlet pipe. The rolling frame is located in the rotating seat groove and is rotatable. The heat absorbing wheel is fixed to the outer surface of the rolling frame.

[0008] The heat-absorbing wheel and the rolling frame are both made of copper and can absorb heat quickly. The temperature conduction chamber is a hollow structure, which can adjust the temperature more evenly and absorb heat quickly. The number of the heat-absorbing wheels installed on the surface of the rolling frame can be increased or decreased as needed. The heat-absorbing wheel and the rolling frame rotate according to the transportation of the material.

[0009] As a further improvement of the present invention, the heat absorption wheel includes a copper body, micro grooves, and a magnetic block. The micro grooves and the copper body are an integrated structure. The magnetic block is installed in the copper body. The magnetic block assists the two copper bodies in being adsorbed and fixed as one. The micro grooves are evenly spaced.

[0010] As a further improvement of the present invention, the oil supply tank includes an oil tank, a flexible metal felt, and spring steel. The spring steel is fixed in the oil tank, the flexible metal felt is adhered to the surface of the spring steel, and the bottom of the flexible metal felt is in the oil tank for absorbing oil. The flexible metal felt is a low-temperature resistant and wear-resistant oil scraper structure.

[0011] As a further improvement of the present invention, there are seven rolling racks in total, the heat-absorbing wheels are adsorbed by two semicircles to form a circular body, and the rotating seat is provided with seven groups of two each. The heat-absorbing wheels can be increased or decreased according to the size of the conveying material that needs to absorb heat.

[0012] As a further improvement of the present invention, the micro grooves can guide the excess oil to flow back, and the magnetic blocks are grouped in two, and the magnetic blocks can assist in the rapid loading and unloading of the copper body.

[0013] As a further improvement of the present invention, the centrifugal oil separator includes an input pipe, a shell, a spiral vane, an output pipe, an oil guide port, an oil return pipe, a switch valve, and a drainage channel. The spiral vane is installed inside the shell, the input pipe is connected to the output pipe through the shell, the oil guide port is located below the spiral vane, the oil return pipe is connected to the switch valve, the drainage channel and the shell are an integrated structure, and the oil return pipe transports the refluxed lubricating oil back to the compressor through a pipeline.

[0014] As a further improvement of the present invention, the spiral blade guides the incoming gas to rotate and separate the lubricating oil carried by it, the drainage channel is located at the periphery of the spiral blade to guide the lubricating oil to move downward, and the switch valve controls the collected lubricating oil for reflux transportation.

[0015] As a further improvement of the present invention, the online control method of the refrigeration evaporator based on capillary oil supply in the refrigeration evaporator online control device based on capillary oil supply is as follows:

[0016] S1: The compressor heats and pressurizes the refrigerant, which is then centrifugally separated into the lubricating oil by the centrifugal oil separator. The refrigerant is then transported to the condenser, where the gaseous refrigerant is cooled to liquid. The liquid refrigerant passes through the expansion valve to form a low-temperature mist, which then enters the capillary oil supply evaporator to release cold air and absorb surrounding heat.

[0017] S2: The heat absorbing wheels are assembled on the rolling frame through magnetic blocks, and the number can be increased or decreased according to the required number;

[0018] S3: The PFPE oil stored in the oil tank is sucked upward from the bottom through the flexible metal felt, which is supported by spring steel to apply oil to the surface of the heat absorbing wheel;

[0019] S4: During the online extrusion process, the material will contact the heat-absorbing wheel and push the rolling frame to rotate along the rotating seat. The heat-absorbing wheel absorbs the heat of the material during the rotation and transportation process. The PFPE oil applied on the surface of the heat-absorbing wheel will not affect its heat absorption of the material. The excess oil on the surface will flow back downwards through the space of the rolling frame.

[0020] S5: The material is continuously output online, and the heat-absorbing wheel and the rolling frame rotate continuously to absorb heat. PFPE oil is used to prevent frost from affecting the heat absorption and transportation of the material.

[0021] The porous structure of the flexible metal felt automatically absorbs oil through capillary effect.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] First, the system's heat-absorbing wheels adopt an adjustable design, which can flexibly adjust the number and spacing according to the material shape. When conveying PVC composite plastic tiles, the arc surface structure of the heat-absorbing wheel can adaptively fit the concave and convex surface, increase the contact area, and ensure that materials of different shapes can obtain uniform and efficient heat absorption and cooling effects while maintaining stable transportation.

[0024] Secondly, during the rotation of the heat-absorbing wheel, the flexible metal felt, under the elastic support of the spring steel, continuously and evenly applies PFPE oil to the surface of the heat-absorbing wheel. This lubrication method can not only ensure the efficient heat conduction performance of the heat-absorbing wheel, but also will not affect the transportation of the PVC composite plastic tiles due to the adhesion of the oil film. At the same time, the coating of PFPE oil effectively prevents frost on the surface of the heat-absorbing wheel, ensuring a continuous and stable heat absorption effect. The micro-grooves designed on the surface of the heat-absorbing wheel can automatically recover excess lubricating oil, realizing the recycling of the oil, maintaining the best lubrication state, and avoiding oil waste.

[0025] Third, the heat-absorbing wheel and rolling frame are made of copper with high thermal conductivity, which can quickly absorb and conduct the heat of PVC composite plastic tiles. Among them, the hollow structure of the temperature conduction chamber can effectively balance the temperature distribution of the system, avoid local overheating, and ensure stable and efficient continuous heat absorption performance. This design not only improves the heat exchange efficiency, but also ensures the reliability of equipment operation.

[0026] Fourthly, the centrifugal oil separator uses built-in spiral blades to make the refrigerant rotate at high speed, and uses centrifugal force to effectively separate the lubricating oil carried in it. The separated lubricating oil can be accurately returned to the compressor for recycling, which not only ensures the continuous and stable operation of the lubrication system, but also avoids the problem of reduced energy efficiency caused by lubricating oil loss, and at the same time ensures reliable lubrication of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of the capillary oil supply-based refrigeration evaporator online control device of the present invention.

[0028] Figure 2 It is a structural schematic diagram of the capillary oil supply evaporator of the present invention.

[0029] Figure 3 It is a structural schematic diagram of the copper roller of the present invention.

[0030] Figure 4 It is a structural schematic diagram of the heat absorbing wheel of the present invention.

[0031] Figure 5 It is a schematic diagram of the cross-sectional structure of the fuel supply tank of the present invention.

[0032] Figure 6 It is a structural schematic diagram of the fuel supply tank of the present invention.

[0033] Figure 7 It is a schematic diagram of the cross-sectional structure of the centrifugal oil separator of the present invention.

[0034] Figure 8 The figure is a flow chart of the online control method of the refrigeration evaporator based on capillary oil supply of the present invention.

[0035] Figure: Compressor 1, centrifugal oil separator 2, condenser 3, expansion valve 4, capillary oil evaporator 5, oil supply tank 51, inlet pipe 52, moving channel 53, outlet pipe 54, copper roller 55, heat transfer chamber 21, heat absorption wheel 22, rolling frame 23, rotating seat 24, copper body 31, micro groove 32, magnetic block 33, oil tank 11, flexible metal felt 12, spring steel 13, inlet pipe 61, housing 62, spiral blade 63, outlet pipe 64, oil guide port 65, oil return pipe 66, on-off valve 67, drainage channel 68. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings:

[0037] Example 1:

[0038] As attached Figure 1 To the attached Figure 6 As shown:

[0039] The present invention provides an online control device and method for a refrigeration evaporator based on capillary oil supply. The device and method comprise a compressor 1, a centrifugal oil separator 2, a condenser 3, an expansion valve 4, and a capillary oil supply evaporator 5. The centrifugal oil separator 2 is connected between the compressor 1 and the condenser 3. The expansion valve 4 vaporizes the liquid and transports it to the capillary oil supply evaporator 5.

[0040] The capillary oil supply evaporator 5 includes an oil supply box 51, an inlet pipe 52, a movable channel 53, an outlet pipe 54, and a copper roller 55. The inlet pipe 52 is connected to the outlet pipe 54. The oil supply box 51 is located in a groove of the movable channel 53 and is movable. The copper roller 55 is connected to the inlet pipe 52.

[0041] The copper roller 55 includes a heat conduction chamber 21, a heat absorbing wheel 22, a rolling frame 23, and a rotating seat 24. The heat conduction chamber 21 is located between the rolling frame 23 and the outlet pipe 54. The rotating seat 24 is fixed to the outer surface of the outlet pipe 54. The rolling frame 23 is located in the groove of the rotating frame 24 and can rotate. The heat absorbing wheel 22 is fixed to the outer surface of the rolling frame 23.

[0042] The heat-absorbing wheel 22 and the rolling frame 23 are both made of copper and can absorb heat quickly. The temperature-conducting bin 21 is a hollow structure, which can adjust the temperature more evenly and absorb heat quickly. The number of the heat-absorbing wheels 22 installed on the surface of the rolling frame 23 can be increased or decreased as needed. The heat-absorbing wheel 22 and the rolling frame 23 rotate according to the transportation of the material, and the temperature-conducting bin 21 adjusts the internal temperature to be consistent.

[0043] Among them, the heat absorption wheel 22 includes a copper body 31, micro grooves 32, and a magnetic block 33. The micro grooves 32 and the copper body 31 are an integrated structure. The magnetic block 33 is installed in the copper body 31. The magnetic block 33 assists the two copper bodies 31 to be adsorbed and fixed as one. The micro grooves 32 are evenly spaced and form gaps between the copper bodies 31, so that the oil applied thereto will not be too much on the surface.

[0044] Among them, the oil supply tank 51 includes an oil tank 11, a flexible metal felt 12, and a spring steel 13. The spring steel 13 is fixed in the oil tank 11, and the flexible metal felt 12 is attached to the surface of the spring steel 13. The bottom of the flexible metal felt 12 is in the oil tank 11 for absorbing oil. The flexible metal felt 12 is a low-temperature resistant and wear-resistant oil scraper structure. The oil tank 11 is equipped with PFPE oil, which is resistant to low temperatures and does not solidify, and does not stick to PVC, and does not affect the heat absorption effect.

[0045] Among them, there are seven rolling racks 23 in total, the heat-absorbing wheels 22 are adsorbed by two semicircles to form a circular body, and the rotating seat 24 is provided with seven groups of two in each group. The heat-absorbing wheels 22 can be increased or decreased according to the size of the conveying material that needs to absorb heat. The rolling rack 23 is squeezed and moved by the material online, thereby driving it to rotate along the rotating seat 24.

[0046] The micro grooves 32 can guide the excess oil to flow back, and the magnetic blocks 33 are grouped in two. The magnetic blocks 33 can assist the copper body 31 in rapid loading and unloading. The cross section of the copper body 31 is an arc-shaped structure.

[0047] The specific usage and function of this embodiment are as follows:

[0048] In the present invention, after the compressor 1 heats and pressurizes the refrigerant, the lubricating oil is separated by the centrifugal oil separator 2. Then the gaseous refrigerant enters the condenser 3 and condenses into liquid, and then passes through the expansion valve 4 to form a low-temperature mist and enter the capillary oil supply evaporator 5 to release cold energy. The lubrication system uses PFPE oil stored in the oil tank 11, and the oil is transferred to the surface of the heat-absorbing wheel 22 through the modular flexible metal felt 12 supported by spring steel 13 at the bottom. The heat-absorbing wheel 22 is adjustably fixed to the rolling frame 23 through the magnetic block 33, and the contact number and spacing can be flexibly adjusted according to the concave and convex surface of the PVC composite plastic tile. When the plastic tile is extruded and conveyed online, the heat-absorbing wheel 22 is driven to drive the rolling frame 23 to rotate around the rotating seat 24. At this time, the cold energy conducted by the temperature conducting chamber 21 through the outlet pipe 54 causes the heat-absorbing wheel to absorb the heat of the material. The micro-grooves 32 on the surface of the heat-absorbing wheel can divert excess lubricating oil back to the oil tank 11 to prevent frosting from affecting heat exchange and material transportation.

[0049] Example 2:

[0050] As attached Figure 7 To the attached Figure 8 As shown:

[0051] Among them, the centrifugal oil separator 2 includes an input pipe 61, a shell 62, a spiral vane 63, an output pipe 64, an oil guide port 65, an oil return pipe 66, a switch valve 67, and a drainage channel 68. The spiral vane 63 is installed inside the shell 62, the input pipe 61 is connected to the output pipe 64 through the shell 62, the oil guide port 65 is located below the spiral vane 63, the oil return pipe 66 is connected to the switch valve 67, the drainage channel 68 and the shell 62 are an integrated structure, the oil return pipe 66 transports the refluxed lubricating oil back to the compressor 1 through the pipeline, and the drainage channel 68 is circular and evenly distributed on the inner wall of the shell 62.

[0052] Among them, the spiral blade 63 guides the incoming gas to rotate and separate the lubricating oil carried by it, the drainage channel 68 is located on the periphery of the spiral blade 63 to guide the lubricating oil to move downward, the switch valve 67 controls the collected lubricating oil for reflux transportation, and the oil guide port 65 is a trumpet-shaped structure to collect the oil together.

[0053] Among them, the online control device of the refrigeration evaporator based on capillary oil supply and the online control method of the refrigeration evaporator based on capillary oil supply are as follows:

[0054] S1: The compressor 1 heats and pressurizes the refrigerant, which is then centrifugally separated by the centrifugal oil separator 2. The refrigerant is then transported to the condenser 3 where the gaseous refrigerant is cooled to liquid. The liquid refrigerant passes through the expansion valve 4 to form a low-temperature mist, which then enters the capillary oil evaporator 5 to release cold air and absorb ambient heat.

[0055] S2: The heat absorbing wheels 22 are assembled on the rolling frame 23 through the magnetic blocks 33. The number of heat absorbing wheels can be increased or decreased according to the required number.

[0056] S3: The PFPE oil stored in the oil tank 11 is sucked upward from the bottom by the flexible metal felt 12, which is supported by the spring steel 13 to apply oil to the surface of the heat absorbing wheel 22;

[0057] S4: During the online extrusion process, the material will contact the heat-absorbing wheel 22, pushing the rolling frame 23 to rotate along the rotating base 24. The heat-absorbing wheel 22 absorbs the heat of the material during the rotation and transportation process. The PFPE oil applied on the surface of the heat-absorbing wheel 22 will not affect its heat absorption of the material. The excess oil on the surface will flow back downward through the space of the rolling frame 23.

[0058] S5: The material is continuously output online, and the heat absorbing wheel 22 and the rolling frame 23 rotate continuously to absorb heat. PFPE oil is used to prevent frost from affecting the heat absorption and transportation of the material.

[0059] The porous structure of the flexible metal felt 12 automatically absorbs oil through the capillary effect. The flexible metal felt 12 and the heat absorbing wheel 22 are in a soft-to-hard state, and the loss to the heat absorbing wheel 22 is negligible.

[0060] The specific usage and function of this embodiment are as follows:

[0061] In the present invention, the compressor 1 sends the refrigerant after heating and pressurizing into the centrifugal oil separator 2. The refrigerant enters the shell 62 through the inlet pipe 61 and forms a rotating flow under the guidance of the spiral blade 63, so that the lubricating oil is separated to the edge of the shell under the action of centrifugal force. The separated lubricating oil is collected to the oil guide port 65 through the drainage channel 68, controlled by the switch valve 67 and returned to the reflux bin of the compressor 1 through the return oil pipe 66.

[0062] Utilizing the technical solution of the present invention, or those skilled in the art designing similar technical solutions inspired by the technical solution of the present invention to achieve the above technical effects, all fall within the scope of protection of the present invention.

Claims

1. A capillary oil supply-based refrigeration evaporator online control device, comprising a compressor (1), a centrifugal oil separator (2), a condenser (3), an expansion valve (4), and a capillary oil supply evaporator (5), wherein a centrifugal oil separator (2) is connected between the compressor (1) and the condenser (3), and the expansion valve (4) vaporizes liquid and transports it to the capillary oil supply evaporator (5), characterized in that: The capillary oil supply evaporator (5) comprises an oil supply box (51), an access pipe (52), a moving path (53), an outlet pipe (54), and a copper roller (55); the access pipe (52) is connected to the outlet pipe (54); the oil supply box (51) is located in a groove of the moving path (53) and is movable; and the copper roller (55) is connected to the access pipe (52); The copper roller (55) includes a heat conduction chamber (21), a heat absorption wheel (22), a rolling frame (23), and a rotating seat (24); the heat conduction chamber (21) is located between the rolling frame (23) and the outlet pipe (54); the rotating seat (24) is fixed to the outer surface of the outlet pipe (54); the rolling frame (23) is located in a groove of the rotating seat (24) and is rotatable; and the heat absorption wheel (22) is fixed to the outer surface of the rolling frame (23); The heat absorbing wheel (22) and the rolling frame (23) are both made of copper and can absorb heat quickly. The temperature conducting chamber (21) is a hollow structure and can adjust the temperature more evenly and absorb heat quickly. The heat absorbing wheel (22) is installed on the surface of the rolling frame (23).

2. The refrigeration evaporator online control device based on capillary oil supply according to claim 1, characterized in that: The heat absorption wheel (22) comprises a copper body (31), a micro groove (32), and a magnetic block (33). The micro groove (32) and the copper body (31) are an integrated structure. The magnetic block (33) is installed in the copper body (31). The magnetic block (33) assists the two copper bodies (31) to be adsorbed and fixed as one.

3. The refrigeration evaporator online control device based on capillary oil supply according to claim 1, characterized in that: The oil supply tank (51) comprises an oil tank (11), a flexible metal felt (12), and spring steel (13); the spring steel (13) is fixed in the oil tank (11); the flexible metal felt (12) is attached to the surface of the spring steel (13); and the bottom of the flexible metal felt (12) is located in the oil tank (11) for absorbing oil.

4. The refrigeration evaporator online control device based on capillary oil supply according to claim 1, characterized in that: There are seven rolling racks (23) in total, the heat absorbing wheels (22) are adsorbed by two semicircles to form a circular body, and there are seven groups of rotating seats (24) with two in each group.

5. The refrigeration evaporator online control device based on capillary oil supply according to claim 2, characterized in that: The micro grooves (32) can guide the excess oil to flow back, and the magnetic blocks (33) are grouped into two.

6. The refrigeration evaporator online control device based on capillary oil supply according to claim 1, characterized in that: The centrifugal oil separator (2) comprises an input pipe (61), a housing (62), a spiral blade (63), an output pipe (64), an oil guide port (65), an oil return pipe (66), a switch valve (67), and a drainage channel (68). The spiral blade (63) is installed inside the housing (62). The input pipe (61) is connected to the output pipe (64) through the housing (62). The oil guide port (65) is located below the spiral blade (63). The oil return pipe (66) is connected to the switch valve (67). The drainage channel (68) and the housing (62) are an integrated structure.

7. The refrigeration evaporator online control device based on capillary oil supply according to claim 6, characterized in that: The spiral blade (63) guides the incoming gas to rotate and separate the lubricating oil carried by it, and the drainage channel (68) is located on the periphery of the spiral blade (63) to guide the lubricating oil to move downward.

8. A refrigeration evaporator online control method based on capillary oil supply, characterized in that: The refrigeration evaporator online control device based on capillary oil supply according to any one of claims 1 to 7 is adopted, and the refrigeration evaporator online control method based on capillary oil supply is as follows: S1: The compressor (1) heats and pressurizes the refrigerant, passes it through the centrifugal oil separator (2), centrifugally separates the lubricating oil carried by it, and then delivers the refrigerant to the condenser (3). The gaseous refrigerant is cooled to liquid refrigerant, and the liquid refrigerant forms a low-temperature mist through the expansion valve (4). It enters the capillary oil supply evaporator (5) to release cold air and absorb surrounding heat; S2: The heat absorbing wheel (22) is assembled on the rolling frame (23) through the magnetic block (33); S3: The PFPE oil stored in the oil tank (11) is sucked upward from the bottom through the flexible metal felt (12), and the flexible metal felt (12) is supported by the spring steel (13) to apply oil to the surface of the heat absorbing wheel (22); S4: During the online extrusion process, the material will contact the heat-absorbing wheel (22) and push the rolling frame (23) to rotate along the rotating seat (24), so that the heat-absorbing wheel (22) absorbs the heat of the material during the rotation and transportation process, and the PFPE oil applied on the surface of the heat-absorbing wheel (22) will not affect its heat absorption of the material, and the excess oil on the surface will flow back downward through the space of the rolling frame (23); S5: The material is continuously output online, and the heat absorbing wheel (22) and the rolling frame (23) rotate continuously to absorb heat, and PFPE oil is used to prevent frosting from affecting the heat absorption and transportation of the material.

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