TWI723642B - Cooling device - Google Patents

Abstract

A cooling device includes a body, a pressurizing unit, a heat exchange unit, and an output unit installed in the body. The pressurizing unit is connected to a low-pressure steel cylinder that provides low-pressure carbon dioxide gas, and is suitable for pressurizing low-pressure carbon dioxide gas to form high-pressure carbon dioxide gas. The heat exchange unit is connected to the pressurizing unit and is suitable for heat exchange with high-pressure carbon dioxide gas. The output unit is connected to the heat exchange unit and is suitable for outputting a cooling fluid containing compressed gas and carbon dioxide particles. The cooling fluid and the carbon dioxide particles in it are used to take away the dust on the surface of the workpiece to achieve the effect of cooling and cleaning. In this way, the pressurizing unit pressurizes the low-pressure carbon dioxide gas to the required pre-pressure value, not only can the pressure value be controlled, but the low-pressure steel cylinder can be loaded with more carbon dioxide gas, which improves the supply time of carbon dioxide gas.

Description

Cooling device

The present invention relates to a cooling device, in particular to a cooling device suitable for outputting cooling fluid.

Referring to Figure 1, a conventional cooling control device 1 disclosed in the Republic of China Patent No. I636351 patent case includes a carrier 11 for supplying carbon dioxide gas, and a control module 12 for controlling the flow of carbon dioxide gas and compressed gas. And a number of nozzles 13 for outputting carbon dioxide gas and compressed gas. The carrier 11 is a high-pressure gas cylinder. In this way, the nozzles 13 spray a cooling fluid mixed of carbon dioxide gas and compressed gas with respect to a machine tool 2, so that the machine tool 2 achieves the purpose of cooling down, and the workpiece is reduced by the carbon dioxide particles changed by the carbon dioxide gas phase. The dust on the surface is taken away to achieve a cleaning effect.

However, because carbon dioxide gas needs to be sprayed and flowed under high pressure, it is necessary to load carbon dioxide gas through high-pressure gas cylinders. Generally, the capacity of high-pressure gas cylinders is limited to only about 10~25kg in high-pressure conditions. The time is short, and the gas pressure will change with the use time, it is impossible to provide a stable pressure of carbon dioxide gas for a long time, and the gas pressure cannot be adjusted in line with the actual practice.

Therefore, the purpose of the present invention is to provide a cooling device that can control the pressure of carbon dioxide gas and increase the supply time.

Therefore, the cooling device of the present invention is used to provide a cooling fluid, the cooling fluid includes at least compressed gas, and carbon dioxide particles formed by the phase change of carbon dioxide gas, the cooling device includes: a body, a pressurizing unit, and a heat exchange unit , And an output unit.

The pressurizing unit is arranged in the body and is suitable for pressurizing carbon dioxide gas to form high-pressure carbon dioxide gas.

The heat exchange unit is arranged in the machine body, is connected to the pressurizing unit, and is suitable for heat exchange with high-pressure carbon dioxide gas.

The output unit is arranged on the body, is connected to the heat exchange unit, and is suitable for outputting a cooling fluid containing compressed gas and carbon dioxide particles.

The effect of the present invention is that the pressurizing unit pressurizes low-pressure carbon dioxide gas to the required pre-pressure value, not only can the pressure value be controlled, but the low-pressure steel cylinder can be loaded with more carbon dioxide gas, which improves the supply time of carbon dioxide gas.

Referring to Figures 2, 3 and 4, an embodiment of the cooling device of the present invention is connected to a low-pressure steel cylinder 2 for supplying low-pressure carbon dioxide gas. The cooling device includes a body 3, a lubricating unit 4, a pressurizing unit 5, a heat exchange unit 6, an output unit 7 and a central control unit 8 arranged on the body 3.

The lubrication unit 4 is suitable for containing lubricant.

The pressurizing unit 5 includes a gas storage tank 51 and a pressurizing pump 52 connected to the gas storage tank 51 and suitable for inputting low-pressure carbon dioxide gas. The pressurizing pump 52 is suitable for pressurizing low-pressure carbon dioxide gas to form high-pressure carbon dioxide gas, and outputting high-pressure carbon dioxide gas to the gas storage tank 51. In this embodiment, the pressurizing pump 52 is a gas booster, which mainly uses low-pressure gas to drive a large-area piston end (not shown) so that the small-area piston end (not shown) is High-pressure gas is generated during the movement. When working, the piston end will reciprocate, and as the output pressure value is close to the preset pressure value, the movement speed will slow down until the output pressure value is equal to the preset pressure value and it will stop after reaching equilibrium. , When the pressure balance is broken, the piston end automatically starts to work to the next balance.

It should be noted that the pressurizing pump 52 is not limited to being a gas booster. In other variations of this embodiment, it may also be a general electronically controlled pump.

It is worth noting that the temperature of the aforementioned carbon dioxide gas will rise during the pressurization process, so that the temperature of the high-pressure carbon dioxide gas is about 70°C to 80°C.

The heat exchange unit 6 is connected to the air storage chamber 51 and the pressurizing pump 52. In this embodiment, the heat exchange unit 6 is a plate heat exchanger, which uses ice water or refrigerant as the heat exchange medium to exchange heat with the passing high-pressure carbon dioxide gas.

The output unit 7 includes a filter 70, a first flow valve 71 communicating with the filter 70 and closably releasing compressed gas, and communicating with the storage compartment 62 of the heat exchange unit 6 and closably releasing high-pressure carbon dioxide A second flow valve 72 for gas, a third flow valve 73 connected to the lubrication unit 4 and capable of releasing lubricant in a closable manner, a nozzle group 74, and connected to the first flow valve 71 and the second flow valve 72. A confluence group 75 of the third flow valve 73 and the nozzle group 74.

The filter 70 is connected to a general air compressor (not shown) for filtering impurities in the compressed gas.

The first flow valve 71 is used to control the flow of compressed gas.

The second flow valve 72 is used to control the flow of high-pressure carbon dioxide gas.

The third flow valve 73 is used to control the flow of lubricant.

3, 4, and 5, the nozzle group 74 is suitable for inputting compressed gas, high-pressure carbon dioxide gas and lubricant through the confluence group 75, and outputting a cooling fluid composed of compressed gas, carbon dioxide particles and lubricant. The nozzle group 74 includes an outer tube 741 connected to the first flow valve 71, an inner tube 742 connected to the second flow valve 72, an intermediate tube 743 connected to the third flow valve 73, and connected to A nozzle 744 of the outer tube 741 and the inner tube 742. The middle tube 743 passes through the outer tube 741.

The central control unit 8 includes a first barometer 81, a second barometer 82, a warning element 83, and is electrically connected to the first barometer 81, the second barometer 82, the warning element 83, and the first barometer. A central control module 84 of a flow valve 71, the second flow valve 72 and the third flow valve 73.

The first barometer 81 is used to detect a first barometric value H1 of the high-pressure carbon dioxide gas output by the pressurizing pump 52. In this embodiment, the first barometer 81 is installed on a pipeline connected to the pressurizing pump 52 and used to output high-pressure carbon dioxide gas to the heat exchange unit 6.

The second barometer 82 is used to detect a second barometric pressure value H2 of the low-pressure carbon dioxide gas input to the pressurizing pump 52. In this embodiment, the second barometer 82 is installed on a pipeline connected to the pressurizing pump 52 and used to input low-pressure carbon dioxide gas from the low-pressure steel cylinder 2.

The warning element 83 is used to generate a first warning message S1 and a second warning message S2. The warning element 83 can be a display, a buzzer, or a light-emitting element. The first warning message S1 or the second warning message S2 can be used with the display as text, or with the buzzer as a sound, or with the light-emitting element as a bright light .

The central control module 84 is used to control the opening or closing of the first flow valve 71, the second flow valve 72, and the third flow valve 73, and according to a preset first pre-pressure value H, before receiving the first flow valve 71, the second flow valve 72, and the third flow valve 73. When a pressure value H1 and the first pressure value H1 are less than the first pre-pressure value H, the warning element 83 is controlled to generate the first warning message S to warn that the first pressure value H1 of the output high-pressure carbon dioxide gas is abnormal, And according to a preset second pre-pressure value H', when the second air pressure value H2 is received and the second air pressure value H2 is less than the second pre-pressure value H', the warning element 83 is controlled to generate the second warning The message S2 is used to warn that the second pressure value H2 of the input low-pressure carbon dioxide gas is abnormal.

When the piston end (not shown) in the pressurizing pump 52 reciprocates due to unbalanced pressure, the carbon dioxide gas will be continuously pushed into the gas storage chamber 51 in the process of increasing the inside of the gas storage chamber 51 When the first air pressure value H1 reaches the preset pressure value, it stops.

At this time, the high-pressure carbon dioxide gas passing through the heat exchange unit 6 by the pressurizing pump 52 will exchange heat with the heat exchange unit 6 to reduce the temperature of the high-pressure carbon dioxide gas from 70°C to 80°C to about 20°C. And stored in the gas storage tank 51.

When the central control module 84 controls the first flow valve 71, the second flow valve 72, and the third flow valve 73 to open, it will release compressed gas through the outer tube 741 and high-pressure carbon dioxide through the inner tube 742 The gas, and the lubricant released through the intermediate pipe 743, because the space in the nozzle 744 changes from large to small, the high-pressure carbon dioxide gas passing through will undergo a phase change due to the pressure difference and generate particles, forming a gas-solid coexistence The carbon dioxide and carbon dioxide particles are combined with compressed gas and lubricant to form a cooling fluid that entrains carbon dioxide particles and sprayed to the outside. In this way, in the cutting process, the jet airflow and carbon dioxide particles are used to smoothly take away the dust on the surface of the workpiece to achieve the effect of cooling and cleaning.

In the process of injecting the cooling fluid, the central control module 84 will control the warning element 83 to generate the first warning message S when the first air pressure value H1 is less than the first pre-pressure value H for warning output The first pressure value H1 of the high-pressure carbon dioxide gas is abnormal, and there may be situations where the gas pressure does not meet the requirements, and the central control module 84 will also control the second pressure value H2 when the second pressure value H2 is less than the second pre-pressure value H'. The warning element 83 generates the second warning message S2 to warn that the second pressure value H2 of the input low-pressure carbon dioxide gas is abnormal, indicating that the carbon dioxide gas in the low-pressure steel cylinder 2 may be exhausted, and the low-pressure steel cylinder 2 can be prepared to be replaced.

Based on the above description, the advantages of the foregoing embodiments can be summarized as follows:

1. In the present invention, the pressure value of the output high-pressure carbon dioxide gas can be set by the pressurizing unit 5, so that not only can the required spraying force be obtained, but also a large-capacity low-pressure steel cylinder 2 can be connected, so that the low-pressure steel cylinder 2 is comparable to the conventional one. In comparison, under the same volume, the capacity can be increased to 175kg, which greatly prolongs the use time.

2. The present invention has a built-in gas storage chamber 51, which can still provide a stable spray force when the low-pressure steel cylinder 2 is replaced, without affecting the cooling operation.

3. According to the foregoing, due to the built-in pressure pump 52, the carbon dioxide gas in the low-pressure steel cylinder 2 can be fully used, so that the residual amount of carbon dioxide gas is minimized, and the utilization rate of carbon dioxide gas is improved.

4. In addition, the present invention can use the first barometer 81 and the second barometer 82 when the first pressure value H1 of the output high pressure carbon dioxide gas is abnormal, or the second pressure value H2 of the input low pressure carbon dioxide gas When there is an abnormality, an alarm is generated through the warning element 83 to achieve the purpose of monitoring.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope covered by the patent of the present invention.

2: Low pressure steel cylinder

3: body

4: Lubrication unit

5: Pressure unit

51: Air storage tank

6: Heat exchange unit

7: output unit

70: filter

71: The first flow valve

72: The second flow valve

73: The third flow valve

74: Nozzle group

741: Outer Tube

742: inner tube

743: middle tube

744: Nozzle

75: Confluence group

8: Central control unit

81: The first barometer

82: second barometer

83: warning element

84: Central control module

H1: The first air pressure value

H2: The second air pressure value

H: The first preload value

H’: second preload value

S1: The first warning message

S2: Second warning message

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a three-dimensional schematic diagram illustrating a conventional cooling control device disclosed in the ROC Patent No. I636351; Figure 2 is an incomplete perspective view illustrating an embodiment of the cooling device of the present invention; Figure 3 is a block diagram of the embodiment; Figure 4 is a schematic diagram of this embodiment; and Fig. 5 is a cross-sectional view illustrating a nozzle group in this embodiment.

2: Low pressure steel cylinder

3: body

4: Lubrication unit

5: Pressure unit

51: Air storage tank

52: pressurized pump

6: Heat exchange unit

70: filter

71: The first flow valve

72: The second flow valve

73: The third flow valve

74: Nozzle group

75: Confluence group

81: The first barometer

7: output unit

82: second barometer

Claims (8)

A cooling device is used to provide a cooling fluid. The cooling fluid includes at least a compressed gas and carbon dioxide particles formed by a phase change of carbon dioxide gas. The cooling device includes: a body; a pressurizing unit arranged on the body, and It includes a gas storage chamber, and a pressurized pump connected to the gas storage chamber and suitable for inputting low-pressure carbon dioxide gas, the gas storage chamber is suitable for storing high-pressure carbon dioxide gas, and the pressurized pump is suitable for the formation of pressurized carbon dioxide gas High-pressure carbon dioxide gas, and output high-pressure carbon dioxide gas to the gas storage tank; a heat exchange unit, arranged in the body, connected to the pressurization pump and the gas storage tank, and suitable for heat exchange with high-pressure carbon dioxide gas; An output unit, arranged in the body, connected to the heat exchange unit, and suitable for outputting a cooling fluid containing compressed gas and carbon dioxide particles; and a central control unit, including a first barometer, and electrically connected to the first A central control module of a barometer, the first barometer is used to detect a first pressure value of the high-pressure carbon dioxide gas output by the pressurizing pump, and the central control module is based on a preset first preset When the first pressure value is not less than the first pre-pressure value, the high-pressure carbon dioxide gas is passed through the heat exchange unit and stored in the gas storage tank. The cooling device according to claim 1, wherein the central control unit further includes a warning element electrically connected to the central control module, and when the first air pressure value is less than the first pre-pressure value, the central control module Control the warning element to generate a first warning Message, the first warning message can be one of sound, light, and text. The cooling device according to claim 2, wherein the central control unit further includes a second barometer electrically connected to the central control module, and the second barometer is used to detect the low pressure input to the pressurizing pump A second pressure value of carbon dioxide gas, the central control module controls the warning element to generate a second warning message according to a second pre-pressure value when the second pressure value is less than the second pre-pressure value. 2. The warning message can be sound, light, or text. The cooling device according to claim 2, wherein the output unit includes a first flow valve that is electrically connected to the central control module and can be closed to release compressed gas, and is electrically connected to the central control module and can be closed A second flow valve to release high-pressure carbon dioxide gas. The cooling device according to claim 4, wherein the output unit further includes a nozzle group connecting the first flow valve and the second flow valve, the nozzle group being suitable for inputting compressed gas and high-pressure carbon dioxide gas, and outputting by A cooling fluid composed of compressed gas and carbon dioxide particles. The cooling device according to claim 5, wherein the output unit further includes a filter connected to the first flow valve and suitable for inputting compressed gas, and the filter is suitable for filtering impurities in the compressed gas. The cooling device according to claim 5, further comprising a lubricating unit adapted to contain lubricant, and the output unit further comprising a first lubricating unit that is connected to the lubricating unit and the nozzle group and can release the lubricant in a closable manner. With three flow valves, this nozzle group is also suitable for inputting lubricant and outputting cooling fluid composed of compressed gas, carbon dioxide particles and lubricant. The cooling device according to claim 7, wherein the nozzle group includes An outer tube of the first flow valve, an inner tube connected to the second flow valve, an intermediate tube connected to the third flow valve, and a nozzle connected to the outer tube and the inner tube, the middle The tube passes through the outer tube.

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