A CO2 refrigeration compression device with quantitative addition and compression

Abstract

The present invention discloses a CO2 refrigeration compression device with quantitative addition and compression, which includes a compression device body. An outer wall of the compression device body is fixedly connected with a metering tank. An input end of the compression device body is fixedly connected and communicated with a connecting pipe, and the other end of the connecting pipe is communicated with a bottom of the metering tank. A top of the metering tank is fixedly connected and communicated with a connecting pipe, and the other end of the connecting pipe is fixedly connected and communicated with a pressure pump. A bottom of the pressure pump is fixedly connected with a liquid storage tank. By providing a flowmeter, the volume of the hydraulic oil discharged from the metering tank can be measured, which is equal to the volume of carbon dioxide that can be stored inside the metering tank. When the value measured by the flowmeter is a preset value, the pressure pump no longer pumps the hydraulic oil inside the metering tank. The area below the partition in the metering tank is the amount of added carbon dioxide. Since the compression amount of carbon dioxide can be freely changed, the refrigeration capacity of the compressor can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigeration, and particularly relates to a CO2 refrigeration compression device capable of quantitatively adding and compressing. Background Technique

[0002] In recent years, carbon dioxide, as a natural refrigerant, has been increasingly widely used due to its advantages such as pollution-free and high efficiency. In carbon dioxide refrigeration equipment, the carbon dioxide refrigeration compressor (hereinafter referred to as: carbon dioxide compressor) is one of the most critical components. A compressor is a machine assembled in a factory, and under different operating conditions, different compression principles, displacements, and other situations, the refrigerating capacity of the compressor is also significantly different.

[0003] For existing carbon dioxide compressors, according to their compression principles, displacements, etc. during production, their refrigerating capacities are determined from the factory. If it is necessary to change the refrigerating capacity of the compressor, the only option is to replace the different carbon dioxide compressors, which leads to inconvenient adjustment of the refrigerating capacity during the use of the carbon dioxide compressor and the problem of inability to quantitatively compress. Summary of the Invention

[0004] The purpose of the present invention is to provide a CO2 refrigeration compression device capable of quantitatively adding and compressing to solve the problem in the above-mentioned background technique that for an existing CO2 refrigeration compression device, since the existing carbon dioxide compressor has a determined refrigerating capacity from the factory according to its compression principle, displacement, etc. during production, if it is necessary to change the refrigerating capacity of the compressor, the only option is to replace the different carbon dioxide compressors, which leads to inconvenient adjustment of the refrigerating capacity during the use of the carbon dioxide compressor and the problem of inability to quantitatively compress.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A CO2 refrigeration compression device capable of quantitatively adding and compressing, including a compression device body, a quantitative tank is fixedly connected to the outer wall of the compression device body, a connecting pipe is fixedly connected and communicated with the input end of the compression device body, the other end of the connecting pipe is communicated with the bottom of the quantitative tank, a connecting pipe is fixedly connected and communicated with the top of the quantitative tank, the other end of the connecting pipe is fixedly connected and communicated with a pressure pump, a liquid storage tank is fixedly connected to the bottom of the pressure pump, the input end of the pressure pump penetrates through the liquid storage tank and extends to the bottom of the liquid storage tank, a partition is slidably connected to the inner wall of the quantitative tank, a discharge pipe is fixedly connected and communicated with the output end of the compression device body, an inlet pipe is fixedly connected and communicated with the bottom of the quantitative tank, and a supplementary tank is fixedly connected and communicated with the outer wall of the inlet pipe.

[0006] Specifically, during use, assemble the device. Store hydraulic oil in the liquid storage tank. The pressure pump transports the hydraulic oil inside the liquid storage tank to the inside of the metering tank through the connecting pipe. The hydraulic oil will push the partition to move downward along the inner wall of the metering tank, discharging the air inside the metering tank. At the same time, the air inside the replenishment tank is also discharged. Connect the end of the discharge pipe to the condenser, and connect the end of the inlet pipe to the carbon dioxide input. After the preparatory work is completed, according to the pressure of the carbon dioxide input, the pressure pump pumps out a part of the hydraulic oil inside the metering tank. The area below the partition in the metering tank is the amount of added carbon dioxide. Since the compression amount of carbon dioxide can be freely changed, the refrigerating capacity of the compressor can be changed. Finally, the quantified carbon dioxide enters the inside of the compression device body through the connecting pipe for refrigeration compression and is discharged from the discharge pipe.

[0007] Preferably, a first flow valve is provided on one side of the inlet pipe where it is located near the replenishment tank, a second flow valve is provided on the other side of the inlet pipe where it is located near the replenishment tank. The second flow valve is provided at the end of the inlet pipe close to the metering tank. A pressure gauge is fixedly connected to the end of the inlet pipe far from the metering tank. A flow meter is fixedly installed at the end of the connecting pipe close to the metering tank. A third flow valve is provided at the end of the connecting pipe close to the metering tank.

[0008] Specifically, during the preparatory work, first close the third flow valve, open the first flow valve and the second flow valve, so that the gas inside the metering tank can be discharged from one end of the inlet pipe. The flow meter can measure the volume of the hydraulic oil discharged from the metering tank, which is equal to the volume of carbon dioxide that can be stored inside the metering tank. For the volume of stored carbon dioxide, according to the Clapeyron equation: PV = nRT, based on the amount of carbon dioxide to be compressed and the inlet pressure of carbon dioxide, calculate the required preset volume. When the value measured by the flow meter is the preset value, the pressure pump no longer pumps the hydraulic oil inside the metering tank, making the amount of carbon dioxide that can be stored inside the metering tank constant, thus achieving the purpose of quantitatively adding carbon dioxide.

[0009] Preferably, a piston is movably connected to the inner wall of the replenishment tank. A telescopic rod is fixedly connected to the top of the replenishment tank. The lower end of the telescopic rod passes through the replenishment tank and is fixedly connected to the middle of the piston.

[0010] Specifically, the pressure gauge is used to detect the pressure of the carbon dioxide entering the metering tank. When filling carbon dioxide, the telescopic rod contracts, extracting a part of the carbon dioxide gas into the inside of the replenishment tank. After filling is completed, close the first flow valve, keep the second flow valve open and the third flow valve closed, and extend the telescopic rod, so that the gas inside the replenishment tank is pushed into the inlet pipe and then into the metering tank, which is used to push the carbon dioxide gas inside the inlet pipe into the metering tank, thereby making the amount of carbon dioxide entering the metering tank more accurate.

[0011] Preferably, the partition plate comprises a plate body, an upper film and a lower film. The upper end of the plate body is fixedly connected to the outer wall of the upper film, and the lower end of the plate body is fixedly connected to the outer wall of the lower film.

[0012] Specifically, the plate body plays a supporting role, and the upper film and the lower film at both ends of the plate body play a sealing role, which is used to separate the hydraulic oil from the carbon dioxide gas.

[0013] Preferably, a groove is formed on the outer wall of the plate body, an annular airbag is fixedly connected to the inner wall of the groove, an elastic airbag is fixedly connected to the outer wall of the lower film away from the plate body, and a plurality of thin tubes are fixedly connected to the inner wall of the plate body. The elastic airbag is communicated with the inside of the annular airbag through the arranged thin tubes.

[0014] Specifically, when carbon dioxide gas is pressed into the quantitative tank, the pressure of the tank body below the partition plate increases. The elastic airbag will be compressed due to the change of the internal pressure of the quantitative tank, so that the gas inside the elastic airbag is pressed into the inside of the annular airbag, causing the annular airbag to expand and tightly adhere to the inner wall of the quantitative tank, firmly fixing the partition plate inside the quantitative tank, thereby preventing the partition plate from moving when filling carbon dioxide.

[0015] Preferably, a rubber ring is fixedly connected to the outer wall of the annular airbag.

[0016] Specifically, with the setting of the rubber ring, when the annular airbag expands and contacts the inner wall of the quantitative tank, the rubber ring will be pressed against the inner wall. The smaller contact area of the rubber ring results in a greater pressure on the inner wall of the quantitative tank, so that the partition plate achieves a better fixing and sealing effect.

[0017] Preferably, a glass window is inlaid on the outer wall of the quantitative tank.

[0018] Specifically, with the setting of the glass window, the situation of the partition plate inside the quantitative tank can be conveniently observed.

[0019] Preferably, a support foot is fixedly connected to the bottom of the compression device body, a fixing frame is fixedly connected to the outer wall of the compression device body, and the compression device body is fixedly connected to the outer walls of the quantitative tank and the liquid storage tank through the arranged fixing frame.

[0020] Specifically, the support foot is used to maintain the stability of the compression device body, and the fixing frame is used to fix the quantitative tank and the liquid storage tank.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. Through the provided liquid storage tank, the flowmeter can measure the volume of hydraulic oil discharged from the metering tank, which is equal to the volume of carbon dioxide that can be stored inside the metering tank. For the volume of stored carbon dioxide, according to the Clapeyron equation: PV = nRT, based on the amount of carbon dioxide to be compressed and the inlet pressure of carbon dioxide, the required preset volume can be calculated. The pressure pump pumps out a part of the hydraulic oil inside the metering tank. When the value measured by the flowmeter is the preset value, the pressure pump stops pumping the hydraulic oil inside the metering tank. The area below the partition in the metering tank is the amount of added carbon dioxide. Since the compression amount of carbon dioxide can be freely changed, the cooling capacity of the compressor can be adjusted accordingly.

[0023] 2. The provided pressure gauge is used to detect the pressure of carbon dioxide entering the metering tank. When filling carbon dioxide, the telescopic rod contracts, and a part of the carbon dioxide gas is drawn into the inside of the supplementary tank. After filling is completed, the first flow valve is closed, the second flow valve is kept open, and the third flow valve is closed. The telescopic rod is extended, so that the gas inside the supplementary tank is pushed into the inlet pipe and then into the metering tank, which is used to push the carbon dioxide gas inside the inlet pipe into the metering tank, thus making the amount of carbon dioxide entering the metering tank more accurate.

[0024] 3. The provided plate body plays a supporting role, and the upper and lower rubber films at both ends of the plate body play a sealing role, which is used to separate the hydraulic oil from the carbon dioxide gas. When carbon dioxide gas is pressed into the metering tank, the pressure of the tank body below the partition increases. The elastic airbag will be compressed due to the pressure change inside the metering tank, so that the gas inside the elastic airbag is pressed into the inside of the annular airbag, causing the annular airbag to expand and tightly adhere to the inner wall of the metering tank, firmly fixing the partition inside the metering tank, thus preventing the partition from moving during carbon dioxide filling.

[0025] 4. Through the provided rubber ring, when the annular airbag expands and contacts the inner wall of the metering tank, the rubber ring will be pressed against the inner wall. The smaller contact area of the rubber ring results in a greater pressure on the inner wall of the metering tank, thus achieving a better fixing and sealing effect for the partition. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 is a three-dimensional structural schematic diagram of the present invention in another direction;

[0028] Figure 3 is a top-view structural schematic diagram of the present invention;

[0029] Figure 4 is a cross-sectional structural schematic diagram of the metering pipe of the present invention;

[0030] Figure 5 Schematic cross-sectional structure diagram of the supplementary tank of the present invention;

[0031] Figure 6 Schematic three-dimensional structure diagram of the partition plate of the present invention;

[0032] Figure 7 Schematic cross-sectional structure diagram of the partition plate of the present invention;

[0033] Figure 8 For the present invention Figure 6 Enlarged schematic diagram of the structure at position A in

[0034] In the figure: 1. Compression device body; 2. Dosing tank; 3. Connecting pipe; 4. Inlet pipe; 5. Discharge pipe; 6. Liquid storage tank; 7. Connecting pipe; 8. Pressure pump; 9. Supplementary tank; 10. Fixed frame; 11. Partition plate; 12. Support feet; 13. Pressure gauge; 14. First flow valve; 15. Second flow valve; 16. Third flow valve; 17. Glass window; 18. Flowmeter; 19. Telescopic rod; 20. Piston; 21. Lower film; 22. Annular airbag; 23. Elastic airbag; 24. Thin tube; 25. Rubber ring; 26. Plate body; 27. Upper film; 28. Groove. Specific embodiments

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figures 1-8 , the present invention provides a technical solution: a CO2 refrigeration compression device capable of quantitatively adding compression, including a compression device body 1, a dosing tank 2 is fixedly connected to the outer wall of the compression device body 1, an input end of the compression device body 1 is fixedly connected and communicated with a connecting pipe 3, the other end of the connecting pipe 3 is communicated with the bottom of the dosing tank 2, a connecting pipe 7 is fixedly connected and communicated with the top of the dosing tank 2, the other end of the connecting pipe 7 is fixedly connected and communicated with a pressure pump 8, a liquid storage tank 6 is fixedly connected to the bottom of the pressure pump 8, an input end of the pressure pump 8 penetrates through the liquid storage tank 6 and extends to the bottom of the liquid storage tank 6, a partition plate 11 is slidably connected to the inner wall of the dosing tank 2, an output end of the compression device body 1 is fixedly connected and communicated with a discharge pipe 5, an inlet pipe 4 is fixedly connected and communicated with the bottom of the dosing tank 2, and a supplementary tank 9 is fixedly connected and communicated with the outer wall of the inlet pipe 4.

[0037] In this embodiment, hydraulic oil is stored in the liquid storage tank 6. The pressure pump 8 transports the hydraulic oil inside the liquid storage tank 6 to the inside of the metering tank 2 through the connecting pipe 7. The hydraulic oil will push the partition plate 11 to move downward along the inner wall of the metering tank 2, discharging the air inside the metering tank 2. At the same time, the air inside the supplementary tank 9 is also discharged. The end of the discharge pipe 5 is connected to the condenser, and the end of the inlet pipe 4 is connected to the carbon dioxide input. After the preparation work is completed, according to the pressure of the carbon dioxide input, the pressure pump 8 pumps out a part of the hydraulic oil inside the metering tank 2. The area below the partition plate 11 in the metering tank 2 is the amount of added carbon dioxide. Since the compression amount of carbon dioxide can be freely changed, the refrigerating capacity of the compressor can be changed. Finally, the quantified carbon dioxide enters the inside of the compression device body 1 through the communication pipe 3 for refrigeration compression and is discharged from the discharge pipe 5.

[0038] Among them, a first flow valve 14 is arranged on one side of the inlet pipe 4 near the supplementary tank 9, a second flow valve 15 is arranged on the other side of the inlet pipe 4 near the supplementary tank 9. The second flow valve 15 is arranged at the end of the inlet pipe 4 close to the metering tank 2. The end of the inlet pipe 4 far from the metering tank 2 is fixedly connected with a pressure gauge 13. A flowmeter 18 is fixedly installed at the end of the connecting pipe 7 close to the metering tank 2. A third flow valve 16 is arranged at the end of the communication pipe 3 close to the metering tank 2.

[0039] In this embodiment, when preparing, first close the third flow valve 16, open the first flow valve 14 and the second flow valve 15, so that the gas inside the metering tank 2 can be discharged from one end of the inlet pipe 4. The flowmeter 18 can measure the volume of the hydraulic oil discharged from the metering tank 2, which is equal to the volume of carbon dioxide that can be stored inside the metering tank 2. For the volume of stored carbon dioxide, according to the Clapeyron equation: PV = nRT, based on the amount of carbon dioxide to be compressed and the inlet pressure of carbon dioxide, the required preset volume can be calculated. When the value measured by the flowmeter 18 is the preset value, the pressure pump 8 no longer pumps out the hydraulic oil inside the metering tank 2, making the amount of carbon dioxide that can be stored inside the metering tank 2 constant, so as to achieve the purpose of quantitatively adding carbon dioxide.

[0040] Among them, a piston 20 is movably connected to the inner wall of the supplementary tank 9. The top of the supplementary tank 9 is fixedly connected with a telescopic rod 19. The lower end of the telescopic rod 19 passes through the supplementary tank 9 and is fixedly connected to the middle of the piston 20.

[0041] In this implementation scheme, the pressure gauge 13 is used to detect the pressure of the carbon dioxide entering the interior of the metering tank 2. When filling carbon dioxide, the telescopic rod 19 contracts, extracting a part of the carbon dioxide gas into the interior of the replenishing tank 9. After filling is completed, the first flow valve 14 is closed, the second flow valve 15 is kept open and the third flow valve 16 is closed, and the telescopic rod 19 is extended, so that the gas inside the replenishing tank 9 is pushed into the inlet pipe 4 and then into the interior of the metering tank 2, which is used to push the carbon dioxide gas inside the inlet pipe 4 into the metering tank 2, thereby making the amount of carbon dioxide entering the interior of the metering tank 2 more accurate.

[0042] Among them, the partition 11 includes a plate body 26, an upper film 27 and a lower film 21. The upper end of the plate body 26 is fixedly connected to the outer wall of the upper film 27, and the lower end of the plate body 26 is fixedly connected to the outer wall of the lower film 21.

[0043] In this implementation scheme, the plate body 26 plays a supporting role, and the upper film 27 and the lower film 21 at both ends of the plate body 26 play a sealing role, which is used to separate the hydraulic oil from the carbon dioxide gas.

[0044] Among them, a groove 28 is formed in the outer wall of the plate body 26, an annular airbag 22 is fixedly connected to the inner wall of the groove 28, an elastic airbag 23 is fixedly connected to the outer wall of the lower film 21 away from the plate body 26, and a plurality of thin tubes 24 are fixedly connected to the inner wall of the plate body 26. The elastic airbag 23 is communicated with the inside of the annular airbag 22 through the arranged thin tubes 24.

[0045] In this implementation scheme, when carbon dioxide gas is pressed into the interior of the metering tank 2, the pressure of the tank body below the partition 11 increases. The elastic airbag 23 will be compressed due to the change in the internal pressure of the metering tank 2, so that the gas inside the elastic airbag 23 is pressed into the interior of the annular airbag 22, causing the annular airbag 22 to expand and tightly adhere to the inner wall of the metering tank 2, firmly fixing the partition 11 inside the metering tank 2, thereby preventing the partition 11 from moving when filling carbon dioxide.

[0046] Among them, a rubber ring 25 is fixedly connected to the outer wall of the annular airbag 22.

[0047] In this implementation scheme, due to the setting of the rubber ring 25, when the annular airbag 22 expands and contacts the inner wall of the metering tank 2, the rubber ring 25 will be pressed against the inner wall. The smaller contact area of the rubber ring 25 results in a greater pressure on the inner wall of the metering tank 2, thereby enabling the partition 11 to achieve better fixing and sealing effects.

[0048] Among them, a glass window 17 is inlaid and installed on the outer wall of the metering tank 2.

[0049] In this implementation scheme, due to the setting of the glass window 17, the situation of the partition 11 inside the metering tank 2 can be conveniently observed.

[0050] Among them, support feet 12 are fixedly connected to the bottom of the compression device body 1, and a fixing frame 10 is fixedly connected to the outer wall of the compression device body 1. The compression device body 1 is fixedly connected to the outer walls of the metering tank 2 and the liquid storage tank 6 through the provided fixing frame 10.

[0051] In this embodiment, the support feet 12 are used to maintain the stability of the compression device body 1, and the fixing frame 10 is used to fix the metering tank 2 and the liquid storage tank 6.

[0052] The working principle and usage process of the present invention: When in use, assemble the device. The liquid storage tank 6 stores hydraulic oil. The pressure pump 8 transports the hydraulic oil inside the liquid storage tank 6 to the inside of the metering tank 2 through the connecting pipe 7. The hydraulic oil will push the partition plate 11 to move downward along the inner wall of the metering tank 2, discharging the air inside the metering tank 2. At the same time, the air inside the replenishing tank 9 is also discharged. Connect the end of the discharge pipe 5 to the condenser, and connect the end of the inlet pipe 4 to the carbon dioxide input. After the preparation work is completed, according to the pressure of the carbon dioxide input, the pressure pump 8 pumps out a part of the hydraulic oil inside the metering tank 2. The area below the partition plate 11 in the metering tank 2 is the amount of added carbon dioxide. Since the compression amount of carbon dioxide can be freely changed, the refrigeration capacity of the compressor can be changed. Finally, the quantified carbon dioxide enters the inside of the compression device body 1 through the communicating pipe 3 for refrigeration compression and is discharged from the discharge pipe 5.

[0053] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CO2 refrigeration compression device capable of quantitatively adding and compressing, comprising a compression device body (1), characterized in that: The outer wall of the compression device body (1) is fixedly connected with a metering tank (2). The input end of the compression device body (1) is fixedly connected and communicated with a connecting pipe (3). The other end of the connecting pipe (3) is communicated with the bottom of the metering tank (2). The top of the metering tank (2) is fixedly connected and communicated with a connecting pipe (7). The other end of the connecting pipe (7) is fixedly connected and communicated with a pressure pump (8). The bottom of the pressure pump (8) is fixedly connected with a liquid storage tank (6). The input end of the pressure pump (8) penetrates through the liquid storage tank (6) and extends to the bottom of the liquid storage tank (6). A partition plate (11) is slidably connected to the inner wall of the metering tank (2). The output end of the compression device body (1) is fixedly connected and communicated with a discharge pipe (5). The bottom of the metering tank (2) is fixedly connected and communicated with an inlet pipe (4). The outer wall of the inlet pipe (4) is fixedly connected and communicated with a replenishing tank (9). A first flow valve (14) is arranged on one side of the inlet pipe (4) close to the replenishing tank (9). A second flow valve (15) is arranged on the other side of the inlet pipe (4) close to the replenishing tank (9). The second flow valve (15) is arranged at the end of the inlet pipe (4) close to the metering tank (2). A pressure gauge (13) is fixedly connected to the end of the inlet pipe (4) far from the metering tank (2). A flowmeter (18) is fixedly installed at the end of the connecting pipe (7) close to the metering tank (2). A third flow valve (16) is arranged at the end of the connecting pipe (3) close to the metering tank (2). A piston (20) is movably connected to the inner wall of the replenishing tank (9). A telescopic rod (19) is fixedly connected to the top of the replenishing tank (9). The lower end of the telescopic rod (19) passes through the replenishing tank (9) and is fixedly connected to the middle of the piston (20).

2. The CO2 refrigeration compression device capable of quantitatively adding and compressing according to claim 1, wherein: The partition plate (11) includes a plate body (26), an upper film (27) and a lower film (21). The upper end of the plate body (26) is fixedly connected to the outer wall of the upper film (27). The lower end of the plate body (26) is fixedly connected to the outer wall of the lower film (21).

3. A CO2 refrigeration compression device capable of quantitatively adding and compressing according to claim 2, characterized in that: A groove (28) is formed in the outer wall of the plate body (26). An annular airbag (22) is fixedly connected to the inner wall of the groove (28). An elastic airbag (23) is fixedly connected to the outer wall of the lower film (21) far from the plate body (26). A plurality of thin pipes (24) are fixedly connected to the inner wall of the plate body (26). The elastic airbag (23) is communicated with the inside of the annular airbag (22) through the arranged thin pipes (24).

4. A CO2 refrigeration compression device capable of quantitatively adding and compressing according to claim 3, characterized in that: A rubber ring (25) is fixedly connected to the outer wall of the annular airbag (22).

5. A CO2 refrigeration compression device that can be quantitatively added and compressed according to claim 1, characterized in that: A glass window (17) is inlaid and installed on the outer wall of the metering tank (2).

6. The CO2 refrigeration compression device capable of quantitative addition and compression according to claim 1, wherein: Support feet (12) are fixedly connected to the bottom of the compression device body (1). A fixing frame (10) is fixedly connected to the outer wall of the compression device body (1). The compression device body (1) is fixedly connected to the outer walls of the metering tank (2) and the liquid storage tank (6) through the arranged fixing frame (10).

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