CN214010019U - Vacuum cooling tower - Google Patents
Vacuum cooling tower Download PDFInfo
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- CN214010019U CN214010019U CN202021870896.6U CN202021870896U CN214010019U CN 214010019 U CN214010019 U CN 214010019U CN 202021870896 U CN202021870896 U CN 202021870896U CN 214010019 U CN214010019 U CN 214010019U
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Abstract
The utility model discloses a vacuum cooling tower, which utilizes vacuum to promote evaporation, the cooling effect is not restricted by the surrounding air environment, the power consumption of a circulating water pump is reduced, the energy is saved, the cooling effect can be controlled by adjusting the vacuum degree, the circulating water is not in direct contact with the outside atmosphere, and the water quality is stable; the top of cooling tower body is provided with evacuation equipment, evacuation equipment is used for carrying out the evacuation to cooling tower body inside, an evaporation ambient pressure for reducing water, evacuation equipment's air inlet department is provided with the breakwater, the breakwater is used for preventing the drop of water from getting into evacuation equipment, the upper portion of cooling tower body is provided with the inlet tube, the lower part of cooling tower body is provided with the outlet pipe, the inlet tube is used for letting in the radiating high temperature water of needs, the outlet pipe is used for discharging to accomplish radiating low temperature water, cooling tower body inner chamber middle part between inlet tube and the outlet pipe is provided with atomizing equipment, atomizing equipment is used for atomizing into the drop of water, a heat radiating area for the increase water.
Description
Technical Field
The utility model discloses a vacuum cooling tower belongs to cooling arrangement technical field, concretely relates to utilize vacuum evaporation to reduce cooling tower of circulation temperature.
Background
Cooling towers, as evaporative cooling devices, have been widely used in various industries, mainly to reduce the temperature of circulating water. The working principle is as follows: the fan is used for pushing air to flow in the cooling tower, so that water evaporation is promoted, and meanwhile, the flow surface area of circulating water is increased by using the cooling tower filler, so that the heat exchange area is increased. The two components act together to dissipate the heat of the circulating water to the surrounding air through evaporation and heat exchange, thereby achieving the purpose of reducing the temperature of the circulating water.
It follows that cooling towers require a large volume, the cooling effect of which is mainly influenced by the ambient air environment, and which need to be arranged in well-ventilated places. However, such places, such as building roofs, outdoors and the like, are often far away from equipment using circulating water, and therefore, the cooling tower is arranged in such places, so that the length of a circulating water pipeline is increased, the load of a circulating water pump is increased, and certain negative effects are generated on the appearance of the building and the surrounding environment.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art exists not enough, provides a vacuum cooling tower, utilizes the vacuum to promote the evaporation, and the cooling effect does not receive the restriction of ambient air environment, reduces circulating water pump's consumption, and the energy saving, the cooling effect can be controlled through adjusting vacuum moreover, the circulating water not with external atmosphere direct contact, water stabilization.
In order to solve the technical problem, the utility model discloses a technical scheme be: the vacuum cooling tower comprises a cooling tower body, wherein vacuumizing equipment is arranged at the top of the cooling tower body and used for vacuumizing the inside of the cooling tower body and reducing the evaporation environment pressure of water, a water baffle is arranged at an air inlet of the vacuumizing equipment and used for preventing water drops from entering the vacuumizing equipment, a water inlet pipe is arranged at the upper part of the cooling tower body, a water outlet pipe is arranged at the lower part of the cooling tower body and used for introducing high-temperature water needing heat dissipation, a water outlet pipe is used for discharging low-temperature water for completing heat dissipation, atomizing equipment is arranged in the middle of an inner cavity of the cooling tower body between the water inlet pipe and the water outlet pipe and used for atomizing water into water drops and increasing the heat dissipation area of a water body;
the atomization device is an ultrasonic atomizer and comprises a shell with a cavity, more than two energy conversion sheet cavities are arranged on the upper end surface of the shell, inner tapping teeth are arranged on the inner wall of each energy conversion sheet cavity, a first spring, a sealing ring, an energy conversion sheet and a pressing ring are sequentially arranged in each energy conversion sheet cavity, outer tapping teeth matched with the inner tapping teeth on the inner wall of each energy conversion sheet cavity are arranged at the bottom of the pressing ring, the first spring, the sealing ring and the energy conversion sheet are sequentially arranged in each energy conversion sheet cavity, the pressing ring is screwed and fixed towards the thread direction, two inclined planes which are symmetrical and inclined downwards are arranged on the upper end surface of the shell, the energy conversion sheet cavities are respectively arranged on the two inclined planes, the central distance between every two adjacent energy conversion sheet cavities is larger than a millimeter, the arrangement mode of the energy conversion sheet cavities on the two inclined planes is staggered, the two inclined planes are respectively provided with five energy conversion sheet cavities, and the distance between every two adjacent energy conversion sheet cavities is equal, the energy conversion sheet cavities on the single-side inclined plane are arranged in order and are distributed in a staggered mode relative to the energy conversion sheet cavities on the other inclined plane, and water level sensing switches are arranged at the top ends of the two inclined planes on the surface of the upper end of the shell and used for conducting on-off control after water level detection and sensing are conducted on the water level sensing switches.
The cooling tower is characterized in that a water replenishing pipe is arranged on the cooling tower body and is positioned between the water inlet pipe and the water outlet pipe, and the water replenishing pipe is used for replenishing water loss caused by water vapor pumped away by the vacuum pumping equipment.
And the bottom of the cooling tower body is provided with a vent pipe, and the vent pipe is used for venting water in the inner cavity of the cooling tower body.
And a liquid level switch is arranged on the cooling tower body and is used for controlling the water level of the inner cavity of the cooling tower body.
The upper part of the inner side of the cooling tower body is provided with a vacuum degree adjusting device, the vacuum degree adjusting device is used for adjusting the vacuum degree of the inner cavity of the cooling tower body, the vacuum degree adjusting device is a valve capable of adjusting pressure difference, and the valve is a damping one-way valve in the prior art.
And the cooling tower body is provided with a vacuum display device, and the vacuum display device is used for monitoring the real-time vacuum pressure inside the cooling tower body.
The cooling tower is characterized in that an observation window is arranged on the cooling tower body and used for checking the operation condition and maintenance of the inner cavity of the cooling tower body.
The water baffle is of a net structure.
Vacuum adjusting equipment includes valve body, second spring, pressure sensing diaphragm and case, pressure sensing diaphragm upper portion sets up sealed chamber, set up medium connecting channel between sealed chamber and the valve export, connecting channel slope, perpendicular or the mode setting of part slope perpendicular to valve export, connecting channel sets up in the valve body, the entry of valve body sets up filter equipment.
Compared with the prior art, the utility model beneficial effect who has is: the utility model uses vacuum to promote evaporation, rather than air flow, so that a fan and a larger air flow space are not needed; the evaporation surface area is increased by atomization techniques rather than by the flow of water, and therefore no packing is required. Therefore, the utility model has small volume and small occupied area; the utility model discloses a cooling effect does not receive the restriction of ambient air environment, therefore lays the place and does not have special requirement, can arrange nearby around the equipment that uses the circulating water, both can reduce circulating water pipeline length, and material saving can reduce circulating water pump's load again, reduces circulating water pump's consumption, the energy saving. The utility model discloses a cooling effect can be controlled through adjusting vacuum, and the circulating water does not contact with external atmosphere direct contact moreover, water stabilization.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of the atomizing apparatus of the present invention.
Fig. 3 is a left side view of the middle atomizing apparatus of the present invention.
Fig. 4 is a schematic view of an assembly structure of the middle heat exchanging plate cavity and the pressing ring of the present invention.
Fig. 5 is a schematic structural diagram of the vacuum degree adjusting device of the present invention.
In the figure: the device comprises a vacuum pumping device 1, an observation window 2, a vacuum display device 3, a water baffle 4, a water inlet pipe 5, a vacuum degree adjusting device 6, a liquid level switch 7, a water replenishing pipe 8, an atomization device 9, a shell 91, an energy-changing sheet cavity 92, an inclined plane 93, an inclined plane top end 94, a water level sensing switch 95, a positioning hole 96, a first spring 97, a sealing ring 98, an energy-changing sheet 99, a pressing ring 910, a water outlet pipe 10 and an emptying pipe 11.
Detailed Description
As shown in figures 1 to 5, the vacuum cooling tower of the present invention comprises a cooling tower body, wherein a vacuum-pumping device 1 is arranged at the top of the cooling tower body, the vacuum-pumping device 1 is used for vacuum-pumping the inside of the cooling tower body, used for reducing the evaporation environment pressure of water, a water baffle 4 is arranged at the air inlet of the vacuum pumping device 1, the water baffle 4 is used for preventing water drops from entering the vacuumizing equipment 1, the upper part of the cooling tower body is provided with a water inlet pipe 5, the lower part of the cooling tower body is provided with a water outlet pipe 10, the water inlet pipe 5 is used for introducing high-temperature water needing heat dissipation, the water outlet pipe 10 is used for discharging low-temperature water after heat dissipation is finished, the atomizing device 9 is arranged in the middle of an inner cavity of the cooling tower body between the water inlet pipe 5 and the water outlet pipe 10, and the atomizing device 9 is used for atomizing water into water drops and increasing the heat dissipation area of a water body;
the atomizing device 9 is an ultrasonic atomizer, and includes a housing 91 with a cavity and a circuit board (not shown) disposed in the cavity of the housing, and the housing 91 in this embodiment is made of a metal material. The upper end surface of the shell 91 is provided with more than two energy conversion sheet cavities 92, ten energy conversion sheet cavities are arranged in the embodiment, inner tapping is arranged on the inner wall of the energy conversion sheet cavity 92, a first spring 97, a sealing ring 98, an energy conversion sheet 99 and a pressing ring 910 are sequentially arranged in the energy conversion sheet cavity 92, and outer tapping matched with the inner tapping on the inner wall of the energy conversion sheet cavity 92 is arranged at the bottom of the pressing ring 910. During installation, the first spring 97, the sealing ring 98 and the energy conversion sheet 99 are sequentially placed in the energy conversion sheet cavity 92, and finally the pressing ring 910 is directly screwed and fixed in the thread direction. The upper end surface of the shell 91 is provided with two inclined planes 93 which are symmetrical and inclined downwards, the energy conversion sheet cavities 92 are respectively arranged on the two inclined planes 93, the center distance between every two adjacent energy conversion sheet cavities 92 is larger than 50 mm, and the energy conversion sheet cavities 92 on the two inclined planes 93 are arranged in a staggered mode. The two inclined planes 93 are respectively provided with five energy conversion sheet cavities, the distance between every two adjacent energy conversion sheet cavities 92 is equal, the energy conversion sheet cavities 92 on the single-side inclined plane 93 are arranged in order, and the energy conversion sheet cavities are distributed in a staggered mode relative to the energy conversion sheet cavities on the other inclined plane 93. The two inclined top ends 94 of the upper surface of the housing are provided with water level sensing switches 95 for on/off control after water level detection and sensing.
In addition, positioning holes 96 for mounting and fixing are provided at both sides of the housing.
The utility model relates to an ultrasonic atomizer has two inclined planes at its housing face design, arranges two adjacent energy conversion piece chamber centre spacings that set up simultaneously and is greater than 50 millimeters, and the staggered arrangement of energy conversion piece chamber, makes the atomizing gas that its during operation blowout comes stagger each other and not influenced, consequently can reach best work efficiency, can improve atomization effect by a wide margin, reduces the loss of other energies, can save the electric energy simultaneously, makes its practical value also improve widely. Compared with the traditional product, the atomization efficiency of the ultrasonic atomizer is 1.5 times that of the traditional product, only two novel ultra-large-mist ultrasonic atomizers are needed, and then the atomization effect of three traditional products can be generated, so that the investment of funds can be saved, and half of electric energy consumption can be saved.
Be provided with moisturizing pipe 8 on the cooling tower body, moisturizing pipe 8 is located between inlet tube 5 and the outlet pipe 10, moisturizing pipe 8 is used for replenishing the water yield loss that the vapor caused because of evacuation equipment 1 takes away.
And an emptying pipe 11 is arranged at the bottom of the cooling tower body, and the emptying pipe 11 is used for emptying water in the inner cavity of the cooling tower body.
The cooling tower is characterized in that a liquid level switch 7 is arranged on the cooling tower body, and the liquid level switch 7 is used for controlling the water level of the inner cavity of the cooling tower body.
The upper part of the inner side of the cooling tower body is provided with a vacuum degree adjusting device 6, the vacuum degree adjusting device 6 is used for adjusting the vacuum degree of the inner cavity of the cooling tower body, the vacuum degree adjusting device 6 is a valve capable of adjusting pressure difference, and the valve can also be a damping one-way valve in the prior art.
The cooling tower is characterized in that a vacuum display device 3 is arranged on the cooling tower body, and the vacuum display device 3 is used for monitoring the real-time vacuum pressure inside.
Be provided with observation window 2 on the cooling tower body, observation window 2 is used for looking over the operation situation and the maintenance of cooling tower body inner chamber.
The water baffle 4 is of a net structure.
The vacuum degree adjusting device 6 includes a valve body 61, a second spring 65, a pressure sensing diaphragm 63 and a valve core 62, the upper portion of the pressure sensing diaphragm 63 is provided with a sealing cavity 67, a connecting channel 64 is arranged between the sealing cavity 67 and a valve outlet 68, the connecting channel 64 is inclined, vertical or partially inclined to be perpendicular to the valve outlet 68, the connecting channel 64 is arranged in the valve body 61, and an inlet of the valve body 61 is provided with a filtering device 66.
The utility model discloses dispose: the device comprises a vacuumizing device, an observation window, a vacuum display device, a water baffle, a water inlet pipe, a vacuum degree adjusting device, a liquid level switch, a water replenishing pipe, an atomizing device, a water outlet pipe, a blow-down pipe and the like.
The design principle of the utility model is as follows: the utility model discloses mainly utilizing vacuum environment to promote the evaporation of water, utilizing the atomization technique to increase technical means such as evaporation area of water simultaneously and reducing the temperature of circulating water. The evaporation of water is affected by many factors including air pressure, wind speed, surface area of evaporation, etc. Vacuum, in short, refers to a condition in which the pressure in a space is lower than the normal atmospheric pressure. The gas pressure is determined by the gas density in the space, in other words, the gas density in the vacuum environment is lower than that in the normal atmospheric pressure, and the gas is thin. Therefore, water is more easily converted from a liquid state to a gaseous state in a vacuum environment than at normal atmospheric pressure. The parameter for measuring the vacuum is the vacuum degree. Further, the larger the vacuum degree is, the lower the gas pressure is from the normal atmospheric pressure, the smaller the gas density is, the faster the water is evaporated, and the better the cooling effect is. Thus, the evaporation rate of the moisture can be controlled by adjusting the degree of vacuum. Meanwhile, the larger the evaporation area, the faster the water evaporates. The two components act together to quickly evaporate part of water in the circulating water with higher temperature into water vapor and absorb the heat of the rest water, thereby reducing the temperature of the water body and forming the circulating water with lower temperature.
By last, the utility model discloses dispose evacuation equipment, form the vacuum in its inside. And a vacuum degree adjusting device is provided for adjusting the vacuum degree of the inside to make the inside to a proper vacuum degree.
The utility model discloses dispose vacuum display device for monitor inside real-time vacuum pressure. And meanwhile, the device is provided with atomization equipment for converting circulating water into small water drops, so that the evaporation area of the water body is increased.
The utility model discloses dispose the breakwater for block the not little drop of water of evaporation, make it fall back to the circulating water, reduce the loss of circulating water. Simultaneously the utility model discloses dispose the moisturizing pipe for the moisturizing can guarantee the circulation water yield.
The utility model discloses dispose liquid level switch for the water level of control circulating water guarantees equipment safety. Simultaneously the utility model discloses dispose the observation window for look over inside function situation and maintenance.
The utility model is provided with a blow-down pipe for emptying the internal moisture.
The utility model discloses an operation principle and flow do:
1. the utility model acts on the circulating water, the water inlet pipe 5 and the water outlet pipe 10 both act on the circulating water, certain circulating water is stored in the circulating water, and circulating water with lower temperature flows through the circulating water using equipment (not shown in the figure) through the water outlet pipe 10 to form circulating water with higher temperature and flows in from the water inlet pipe 5;
2. the vacuum pumping equipment 1 makes the inside of the utility model form vacuum;
3. the degree of vacuum inside can be read by the vacuum display device 3;
4. when the internal vacuum degree is low, the air pressure difference between the external environment and the internal environment is not enough to overcome the resistance of the vacuum degree adjusting equipment 6, and external air cannot enter the internal environment, so that the internal vacuum degree is continuously increased; when the internal vacuum degree reaches the required value and then increases, the air pressure difference between the external environment and the internal can overcome the resistance of the vacuum degree adjusting device 6, so that the external air enters the internal. Therefore, the internal vacuum degree can be stabilized at a certain required vacuum value, and the corresponding moisture evaporation requirement is realized. The vacuum value can be adjusted by a vacuum degree adjusting device 6;
5. the atomization device 9 continuously converts the inflowing circulating water with higher temperature into small water drops;
6. under the condition of vacuum inside, water drops and water molecules on the surface of the water body are evaporated into water vapor, and the heat of the rest water is absorbed, so that the temperature of the water body is reduced;
7. the water vapor formed by evaporation is taken away by vacuum-pumping equipment; the water drops which are not evaporated are blocked by the water baffle 4 and fall back to the water body under the action of gravity;
8. as above, part of the circulating water is continuously evaporated, so that the temperature of the whole circulating water is reduced, and circulating water with lower temperature is formed;
9. the water taken away by evaporation can be supplemented by a water supplementing pipe 8 by using other water sources so as to ensure the circulating water quantity;
10. when the circulating water level rises, the liquid level switch 7 can close the operation of the equipment so as to ensure the safety of the equipment;
11. the operation condition and the maintenance of the interior can be checked through the observation window 2;
12. through the blow-down pipe 11, the moisture inside can be evacuated.
The utility model discloses utilize vacuum evaporation's technical means to reduce circulating water temperature. Compared with the conventional cooling tower, the vacuum cooling tower has the following 4 great advantages and has excellent market application prospect:
1. the volume is small, and the occupied area is small;
2. the cooling effect is not influenced by the atmospheric environment, the installation limitation is avoided, the cooling device can be installed nearby around equipment using circulating water, the length of a circulating water pipeline is reduced, the power consumption of a circulating water pump is reduced, and materials and energy are saved;
3. the cooling effect can be controlled by adjusting the vacuum degree;
4. the circulating water is not in direct contact with the outside atmosphere, and the water quality is stable.
The utility model discloses well evacuation equipment 1, vacuum adjusting device 6 and atomization plant 9 are prior art, and evacuation equipment 1's structure is no longer repeated here, is connected with the three electricity through outside control module (like the PLC module), controls, realizes automatic the regulation. The connection modes of the vacuum pumping device 1, the vacuum degree adjusting device 6 and the atomizing device 9 are conventional connection modes, and theoretically, any connection mode which can meet the functions of the vacuum pumping device can be adopted.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. The vacuum cooling tower is characterized by comprising a cooling tower body, wherein the top of the cooling tower body is provided with a vacuumizing device (1), the vacuumizing device (1) is used for vacuumizing the inside of the cooling tower body and reducing the evaporation environment pressure of water, a water baffle (4) is arranged at an air inlet of the vacuumizing device (1), the water baffle (4) is used for preventing water drops from entering the vacuumizing device (1), the upper part of the cooling tower body is provided with a water inlet pipe (5), the lower part of the cooling tower body is provided with a water outlet pipe (10), the water inlet pipe (5) is used for introducing high-temperature water needing heat dissipation, the water outlet pipe (10) is used for discharging low-temperature water completing heat dissipation, the middle part of an inner cavity of the cooling tower body between the water inlet pipe (5) and the water outlet pipe (10) is provided with an atomizing device (9), and the atomizing device (9) is used for atomizing the water into the water drops, the water body is used for increasing the heat dissipation area of the water body;
the atomizing device (9) is an ultrasonic atomizer, and comprises a shell (91) with a cavity, wherein the upper end surface of the shell (91) is provided with more than two energy conversion sheet cavities (92), the inner wall of each energy conversion sheet cavity (92) is provided with an inner tapping tooth, a first spring (97), a sealing ring (98), an energy conversion sheet (99) and a pressing ring (910) are sequentially installed in each energy conversion sheet cavity (92), the bottom of the pressing ring (910) is provided with an outer tapping tooth matched with the inner tapping tooth of the inner wall of each energy conversion sheet cavity (92), the first spring (97), the sealing ring (98) and the energy conversion sheet (99) are sequentially placed in each energy conversion sheet cavity (92), the pressing ring (910) is fixed towards the thread direction, the upper end surface of the shell (91) is provided with two inclined planes (93) which are symmetrical and inclined downwards, the energy conversion sheet cavities (92) are respectively arranged on the two inclined planes (93), and the center distance between every two adjacent energy conversion sheet cavities (92) is greater than 50 mm, the arrangement mode of the energy conversion sheet cavities (92) on the two inclined planes (93) is staggered, the two inclined planes (93) are respectively provided with five energy conversion sheet cavities, the distance between every two adjacent energy conversion sheet cavities (92) is equal, the energy conversion sheet cavities (92) on the single-side inclined plane (93) are arranged in order and are distributed in a staggered manner relative to the energy conversion sheet cavities (92) on the other inclined plane (93), and the top ends (94) of the two inclined planes on the surface of the upper end of the shell are provided with water level sensing switches (95) for on-off control after water level detection and sensing.
2. The vacuum cooling tower according to claim 1, wherein a water replenishing pipe (8) is arranged on the cooling tower body, the water replenishing pipe (8) is positioned between the water inlet pipe (5) and the water outlet pipe (10), and the water replenishing pipe (8) is used for replenishing water loss caused by water vapor pumped by the vacuum pumping equipment (1).
3. The vacuum cooling tower of claim 2, wherein the bottom of the cooling tower body is provided with a blow-down pipe (11), and the blow-down pipe (11) is used for blowing down water in the inner cavity of the cooling tower body.
4. The vacuum cooling tower of claim 3, wherein a liquid level switch (7) is arranged on the cooling tower body, and the liquid level switch (7) is used for controlling the water level of the inner cavity of the cooling tower body.
5. The vacuum cooling tower of claim 4, characterized in that the upper part of the inner side of the cooling tower body is provided with a vacuum degree adjusting device (6), the vacuum degree adjusting device (6) is used for adjusting the vacuum degree of the inner cavity of the cooling tower body, and the vacuum degree adjusting device (6) is a valve capable of adjusting pressure difference.
6. The vacuum cooling tower according to claim 5, characterized in that a vacuum display device (3) is arranged on the cooling tower body, the vacuum display device (3) being used for monitoring the real-time vacuum pressure inside.
7. The vacuum cooling tower of claim 6, wherein the cooling tower body is provided with an observation window (2), and the observation window (2) is used for checking the operation condition and the overhaul of the inner cavity of the cooling tower body.
8. The vacuum cooling tower according to claim 7, wherein the water deflector (4) is a net structure.
9. The vacuum cooling tower according to claim 5, wherein the vacuum degree adjusting device (6) comprises a valve body (61), a second spring (65), a pressure sensing diaphragm (63) and a valve core (62), a sealing cavity (67) is arranged on the upper portion of the pressure sensing diaphragm (63), a connecting channel (64) is arranged between the sealing cavity (67) and the valve outlet (68), the connecting channel (64) is arranged in a manner that the inclined, vertical or partially inclined portion of the connecting channel (64) is perpendicular to the valve outlet (68), the connecting channel (64) is arranged in the valve body (61), and a filtering device (66) is arranged at the inlet of the valve body (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021870896.6U CN214010019U (en) | 2020-09-01 | 2020-09-01 | Vacuum cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021870896.6U CN214010019U (en) | 2020-09-01 | 2020-09-01 | Vacuum cooling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214010019U true CN214010019U (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021870896.6U Active CN214010019U (en) | 2020-09-01 | 2020-09-01 | Vacuum cooling tower |
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| Country | Link |
|---|---|
| CN (1) | CN214010019U (en) |
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2020
- 2020-09-01 CN CN202021870896.6U patent/CN214010019U/en active Active
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