CN109005746B - Steam heating constant temperature and humidity generating device - Google Patents
Steam heating constant temperature and humidity generating device Download PDFInfo
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- CN109005746B CN109005746B CN201810768959.8A CN201810768959A CN109005746B CN 109005746 B CN109005746 B CN 109005746B CN 201810768959 A CN201810768959 A CN 201810768959A CN 109005746 B CN109005746 B CN 109005746B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical class O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000001035 drying Methods 0.000 claims abstract description 38
- 239000003595 mist Substances 0.000 claims abstract description 26
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000006199 nebulizer Substances 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
- A01C1/02—Germinating apparatus; Determining germination capacity of seeds or the like
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physiology (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Air Humidification (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a steam heating constant-temperature constant-humidity generating device which comprises a switch valve, a pressure reducing valve, a drying chamber, an atomizer, a circulating fan, a mixing chamber, a temperature and humidity detector and a controller. When in use, high-temperature and high-pressure saturated water vapor can enter the steam heating constant-temperature and constant-humidity generating device through the switch valve; then, after the pressure is reduced by a pressure reducing valve, the high-temperature and high-pressure saturated water vapor is changed into saturated water and dry vapor, and the dry vapor enters a drying chamber; meanwhile, the atomizer transmits the generated water mist into the drying chamber, and the circulating fan blows air in the environment to be heated and humidified into the drying chamber, so that dry steam, the water mist and the air are mixed; and then, the mixed gas enters the mixing chamber to be uniformly mixed, and the temperature and humidity of the mixing chamber are detected by the temperature and humidity detector and are adjusted by the controller, so that the mixed gas reaches the preset temperature and humidity. The high-temperature high-pressure saturated water vapor is cooled by the water mist and the air of the environment to be heated and humidified, and the energy utilization rate is improved on the basis of no pollution.
Description
Technical Field
The invention relates to the technical field of constant temperature and humidity control devices, in particular to a steam heating constant temperature and humidity generating device.
Background
The constant temperature and humidity environment is helpful for accelerating germination of seeds, and particularly in cold seasons of winter and spring or in cold areas, the constant temperature and humidity environment is required to be created. The conventional method is to heat air directly with a hot wire and then to generate moisture with another device. Also, the hot air is obtained by using coal and then by the principle of heat exchange or the like. However, these methods have low energy utilization and cause environmental pollution.
Therefore, how to improve the energy utilization rate without generating pollution is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a steam heating constant temperature and humidity generating device, which can improve the energy utilization rate without generating pollution.
In order to achieve the above object, the present invention provides the following solutions:
a steam heating constant temperature and humidity generating device comprises:
the inlet of the switch valve can be communicated with the outlet of a steam boiler for providing high-temperature and high-pressure saturated steam;
the inlet of the pressure reducing valve is communicated with the outlet of the switch valve;
the outlet of the pressure reducing valve is communicated with the first inlet of the drying chamber;
an outlet of the atomizer is communicated with a second inlet of the drying chamber, and the atomizer can provide water mist;
the circulating fan can blow air in an environment to be heated and humidified into the drying chamber;
the mixing chamber is provided with an output port, and the output port is communicated with the environment to be heated and humidified;
the temperature and humidity detector is arranged in the mixing chamber and can detect the temperature and the humidity of the mixing chamber;
the controller, the controller with temperature and humidity detector, the ooff valve, the atomizer, the circulating fan is equal signal connection, just the controller can control the atomizer with the aperture and the switching of ooff valve, the controller can also control circulating fan's wind speed for get into the temperature and the humidity of the environment of waiting to heat the humidification reach the default.
In one embodiment, the steam-heated constant-temperature and constant-humidity generating device further comprises a conveying device;
the conveying device can convey the dry steam and the water mist in the drying chamber to the mixing chamber to be mixed.
In one embodiment, the steam-heated constant-temperature and constant-humidity generating device further comprises a conveying pipeline;
the conveying pipeline is communicated with the pressure reducing valve and the drying chamber, high-temperature and high-pressure saturated water vapor passing through the pressure reducing valve can be changed into dry vapor and saturated water in the conveying pipeline, and the dry vapor can be conveyed into the drying chamber through the conveying pipeline.
In a particular embodiment, the delivery conduit is an L-shaped tube.
In one embodiment, the turns of the L-shaped tube are provided with rounded corners.
In one embodiment, the steam-heated constant temperature and humidity generating device further comprises a discharge valve;
the discharge valve is arranged at the bottom of the conveying pipeline and can discharge the saturated water.
In a particular embodiment, the delivery device is a venturi.
In one embodiment, a helical baffle is disposed within the mixing chamber;
the spiral baffle plate can rotate and fully mix dry steam and water mist entering the mixing chamber and air blown by the circulating fan in the environment to be heated and humidified.
In one embodiment, the steam heating constant temperature and humidity generating device further comprises a water tank and a box body;
the atomizer is arranged in the water tank;
the circulating fan, the drying chamber, the mixing chamber, the atomizer and the water tank are all arranged in the box body.
In a specific embodiment, the nebulizer is an ultrasonic nebulizer; and/or
The switch valve is a steam proportional valve.
The various embodiments according to the invention can be combined as desired, and the embodiments obtained after these combinations are also within the scope of the invention and are part of the specific embodiments of the invention.
In a specific embodiment of the invention, when the steam heating constant temperature and humidity generating device disclosed by the invention is used, the switch valve is communicated with the outlet of the steam boiler, so that high-temperature high-pressure saturated water vapor in the steam boiler can enter the steam heating constant temperature and humidity generating device through the switch valve; then, after the pressure is reduced by a pressure reducing valve, the high-temperature and high-pressure saturated water vapor is changed into saturated water and dry vapor, and the dry vapor enters a drying chamber; meanwhile, the atomizer transmits the generated water mist into the drying chamber, and the circulating fan blows air in the environment to be heated and humidified into the drying chamber, so that dry steam, the water mist and the air are mixed; then, the mixture enters a mixing chamber to be uniformly mixed, a temperature and humidity detector detects the temperature and the humidity of the mixing chamber, and when the detected temperature is higher than or lower than a preset value, a controller controls the opening degree of a switch valve to be reduced or increased until the detected temperature reaches the preset value; when the detected humidity is higher than or lower than a preset value, the controller controls the opening of the atomizer to be reduced or increased until the detected humidity reaches the preset value; when the detected temperature is lower than the preset value and the humidity is higher than the preset value, the controller increases the air speed of the circulating fan to increase the air inlet volume of the environment to be heated and humidified, and controls the opening of the switch valve to be increased until the detected temperature and humidity reach the preset values. According to the invention, the high-temperature high-pressure saturated water vapor generated by the steam boiler is utilized to heat the air in the environment to be heated and humidified, the water mist generated by the atomizer is heated, and the opening degrees of the circulating fan, the switch valve and the atomizer are adjusted by the controller, so that the mixed gas reaches the preset temperature and humidity. The high-temperature high-pressure saturated water vapor is cooled by the water mist and the air of the environment to be heated and humidified, and the energy utilization rate is improved on the basis of no pollution.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a steam heating constant temperature and humidity generating device provided by the invention.
Wherein, in fig. 1:
the device comprises a switch valve 1, a pressure reducing valve 2, a drying chamber 3, an atomizer 4, a circulating fan 5, a mixing chamber 6, a conveying device 7, a conveying pipeline 8, a discharge valve 9, a spiral baffle plate 10, a water tank 11 and a box body 12.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Example one
As shown in fig. 1, the present invention provides a steam heating constant temperature and humidity generating device. The steam heating constant-temperature constant-humidity generating device comprises a switch valve 1, a pressure reducing valve 2, a drying chamber 3, an atomizer 4, a circulating fan 5, a mixing chamber 6, a temperature and humidity detector and a controller.
The inlet of the switch valve 1 can be communicated with the outlet of a steam boiler which provides high-temperature high-pressure saturated steam, and is particularly connected with the steam boiler through a flange plate. An inlet of the pressure reducing valve 2 is communicated with an outlet of the switch valve 1, and an outlet of the pressure reducing valve 2 is communicated with a first inlet of the drying chamber 3. The outlet of the atomizer 4 is communicated with the second inlet of the drying chamber 3, the atomizer 4 can provide water mist, and in order to improve the efficiency of providing water mist by the atomizer, the number of the atomizers 4 is 2. Circulating fan 5 can blow the air in the environment of waiting to heat the humidification to drying chamber 3 in, it has the delivery outlet to open on the mixing chamber 6, the delivery outlet switches on with the environment of waiting to heat the humidification, and temperature and humidity detector installs in mixing chamber 6, can detect the temperature and the humidity of mixing chamber 6, in order to improve temperature and humidity detector's the detection accuracy, makes temperature and humidity detector install the delivery outlet position department at mixing chamber 6. The temperature and humidity detector comprises a temperature detector and a humidity detector which are in signal connection with the controller.
The controller is connected with the temperature and humidity detector, the switch valve 1, the atomizer 4 and the circulating fan 5 in a signal mode, the controller can control the opening degree and the opening and closing of the atomizer 4 and the switch valve 1, and the controller can also control the air speed of the circulating fan 5, so that the temperature and the humidity of the environment to be heated and humidified can reach preset values. Here, the preset value refers to a temperature value and a humidity value required by the set to-be-heated and humidified environment, and is set according to actual needs.
High-temperature high-pressure saturated water vapor in the steam boiler can enter the steam heating constant-temperature constant-humidity generating device through the switch valve 1; then, the high-temperature and high-pressure saturated water vapor is reduced in pressure by the pressure reducing valve 2 to become saturated water and dry vapor, and the dry vapor enters the drying chamber 3; meanwhile, the atomizer 4 conveys the generated water mist into the drying chamber 3, and the circulating fan 5 blows air in the environment to be heated and humidified into the drying chamber 3, so that dry steam, the water mist and the air are mixed; then, the mixture enters the mixing chamber 6 to be uniformly mixed, and the temperature and humidity detector detects the temperature and the humidity of the mixing chamber 6.
When the detected temperature and humidity are both higher than the preset values, the controller controls the opening degrees of the switch valve 1 and the atomizer 4 to be reduced, and the air speed of the circulating fan 5 is increased until the detected temperature and humidity both reach the preset values.
When the detected temperature and humidity are both lower than the preset values, the controller can firstly control the opening degrees of the atomizer 4 and the switch valve 1 to be increased until the detected temperature and humidity both reach the preset values.
When the detected temperature is lower than a preset value and the humidity is higher than the preset value, the controller can firstly control the opening of the switch valve 1 to be increased and the opening of the atomizer 4 to be decreased, and if the temperature is lower than the preset value and the humidity is higher than the preset value for a period of time, the wind speed of the circulating fan 5 is reduced until the detected temperature and humidity reach the preset values; if the temperature is higher than the preset value and the humidity is higher than the preset value after a period of time, the wind speed of the circulating fan 5 is increased until the detected temperature and humidity reach the preset values.
When the detected temperature is higher than the preset value and the humidity is lower than the preset value, the controller can firstly control the opening degree of the switch valve 1 to be reduced, the opening degree of the atomizer 4 to be increased, and if the detected temperature is higher than the preset value for a period of time, the air speed of the circulating fan 5 can be increased until the detected temperature and humidity reach the preset values. In the invention, the high-temperature and high-pressure saturated water vapor is cooled by the water mist and the air of the environment to be heated and humidified, so that the energy utilization rate is improved on the basis of no pollution.
In one embodiment, the steam heating constant temperature and humidity generating device further comprises a conveying device 7, and the conveying device 7 can convey the dry steam and the water mist in the drying chamber 3 to the mixing chamber 6 to be mixed. Specifically, in the present embodiment, it is specifically disclosed that the transport device 7 is a venturi tube. When the dry steam passes through the venturi tube, vacuum negative pressure is generated, and cold water mist and air blown by the circulating fan 5 are brought in advance to generate a mixing effect in advance. Because the venturi tube can actively suck the water mist, the water mist generated by the atomizer 4 can be fully utilized. It should be noted that the conveying device 7 is not limited to a venturi tube only, and may be other devices capable of having a suction force, for example, the conveying device 7 may include a suction pump and a conveying pipe, one end of the conveying pipe is communicated with the drying chamber 3, and the other end is communicated with the mixing chamber 6, and the suction pump sucks the mixed gas in the drying chamber 3 into the mixing chamber 6.
In one embodiment, the steam heating constant temperature and humidity generating device further comprises a conveying pipeline 8, the conveying pipeline 8 is communicated with the pressure reducing valve 2 and the drying chamber 3, high-temperature and high-pressure saturated water vapor passing through the pressure reducing valve 2 can be changed into dry steam and saturated water in the conveying pipeline 8, and the dry steam can be conveyed into the drying chamber 3 through the conveying pipeline 8.
In a specific embodiment, the conveying pipeline 8 is an L-shaped pipe, a vertical pipe of the L-shaped pipe is communicated with the pressure reducing valve 2, and a horizontal pipe is communicated with the drying chamber 3, so that saturated water can flow to the horizontal pipe conveniently.
In one embodiment, the turns of the L-shaped tubes are provided with rounded corners, that is, the junctions of the vertical and horizontal tubes are provided with rounded corners. So that the dry steam can smoothly enter the drying chamber 3.
In one embodiment, the steam heating constant temperature and humidity generating device further comprises a discharge valve 9, and the discharge valve 9 is arranged at the bottom of the conveying pipeline 8 and can discharge saturated water. It should be noted that a groove may be disposed at the bottom of the conveying pipeline 8 to contain saturated water, a pipeline is connected to the bottom of the groove, and a drain valve 9 is disposed on the pipeline. In order to realize automatic discharge of saturated water, the discharge valve 9 is provided as an electromagnetic valve, and is electrically controlled to be on and off.
In one embodiment, a spiral baffle 10 is arranged in the mixing chamber 6, and the spiral baffle 10 can rotate to fully mix the dry steam, the water mist and the air in the environment to be heated and humidified, which is blown by the circulating fan 5, entering the mixing chamber 6, so that the flow rate and the temperature of the dry steam are further reduced.
In one embodiment, the steam heating constant temperature and humidity generating device further comprises a water tank 11 and a box body 12, wherein the atomizer 4 is installed in the water tank 11, and the water tank 11 needs to be filled with water and operates at a certain water level and a certain temperature. The circulating fan 5, the drying chamber 3, the mixing chamber 6, the atomizer 4 and the water tank 11 are all arranged in the box body 12. In order to achieve the application of the saturated water discharged from the discharge valve 9, and to avoid waste of the discharge, an outlet of the discharge valve 9 may be communicated with the water tank 11.
In a specific embodiment, the atomizer 4 is an ultrasonic atomizer and the on-off valve 1 is a steam proportional valve. It is understood that the ultrasonic atomizer and the steam proportional valve are merely preferred examples of the atomizer 4 and the on-off valve 1 according to the embodiment of the present invention, and other structures may be provided as required in practical applications.
The invention has the following advantages:
(1) the venturi tube is included, so that the premixing effect on the dry steam and the water mist is realized in advance;
(2) the circulating fan 5 is beneficial to bringing water mist generated by the ultrasonic atomization generator into the mixing chamber 6;
(3) a spiral baffle plate 10 is arranged in the mixing chamber 6, which is beneficial to the full mixing of dry steam and water mist;
(4) the controller is included, and the temperature and the humidity can be completely and accurately controlled.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A steam heating constant temperature and humidity generating device is characterized by comprising:
the steam boiler comprises a switching valve (1), wherein the inlet of the switching valve (1) can be communicated with the outlet of a steam boiler for providing high-temperature and high-pressure saturated steam;
the inlet of the pressure reducing valve (2) is communicated with the outlet of the switch valve (1);
a drying chamber (3), wherein an outlet of the pressure reducing valve (2) is communicated with a first inlet of the drying chamber (3);
an outlet of the atomizer (4) is communicated with a second inlet of the drying chamber (3), and the atomizer (4) can provide water mist;
a circulating fan (5), wherein the circulating fan (5) can blow air in an environment to be heated and humidified into the drying chamber (3);
the mixing chamber (6) is provided with an output port, and the output port is communicated with the environment to be heated and humidified;
the temperature and humidity detector is arranged in the mixing chamber (6) and can detect the temperature and the humidity of the mixing chamber (6);
the controller is in signal connection with the temperature and humidity detector, the switch valve (1), the atomizer (4) and the circulating fan (5), the controller can control the opening and the closing of the atomizer (4) and the switch valve (1), and the controller can also control the air speed of the circulating fan (5) so that the temperature and the humidity of the environment to be heated and humidified reach preset values;
the steam heating constant temperature and humidity generating device also comprises a conveying pipeline (8);
the conveying pipeline (8) is communicated with the pressure reducing valve (2) and the drying chamber (3), high-temperature and high-pressure saturated steam passing through the pressure reducing valve (2) can be changed into dry steam and saturated water in the conveying pipeline (8), and the dry steam can be conveyed into the drying chamber (3) through the conveying pipeline (8).
2. Steam heating constant temperature and humidity generating device according to claim 1, characterized by further comprising a conveying device (7);
the conveying device (7) can convey the dry steam and the water mist in the drying chamber (3) to the mixing chamber (6) to be mixed.
3. Steam heating constant temperature and humidity generating device according to claim 2, characterized in that the conveying means (7) is a venturi tube.
4. Steam heating constant temperature and humidity generating device according to claim 1, characterized in that the conveying pipe (8) is an L-shaped pipe.
5. The steam heating constant temperature and humidity generating device as claimed in claim 4, wherein the L-shaped pipe is provided with a rounded corner at the turning thereof.
6. Steam heating constant temperature and humidity generating device according to any one of claims 1 to 5, characterized by further comprising a discharge valve (9);
the discharge valve (9) is arranged at the bottom of the conveying pipeline (8) and can discharge the saturated water.
7. The steam heating constant-temperature constant-humidity generating device as claimed in claim 1, wherein a spiral baffle plate (10) is arranged in the mixing chamber (6);
the spiral baffle plate (10) can rotate and fully mix dry steam and water mist entering the mixing chamber (6) and air in the environment to be heated and humidified blown by the circulating fan (5).
8. The steam-heated constant-temperature and constant-humidity generating device as claimed in claim 1, further comprising a water tank (11) and a case (12);
the atomizer (4) is arranged in the water tank (11);
the circulating fan (5), the drying chamber (3), the mixing chamber (6), the atomizer (4) and the water tank (11) are all arranged in the box body (12).
9. Steam heated constant temperature and humidity generating device according to any of claims 1 to 5, 7 or 8, characterized in that the atomizer (4) is an ultrasonic atomizer; and/or
The switch valve (1) is a steam proportional valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810768959.8A CN109005746B (en) | 2018-07-13 | 2018-07-13 | Steam heating constant temperature and humidity generating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810768959.8A CN109005746B (en) | 2018-07-13 | 2018-07-13 | Steam heating constant temperature and humidity generating device |
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| CN109005746A CN109005746A (en) | 2018-12-18 |
| CN109005746B true CN109005746B (en) | 2021-08-24 |
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| CN110291868A (en) * | 2019-07-08 | 2019-10-01 | 合肥启迪农业发展有限公司 | A kind of humidifier of novel agricultural technical research |
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| CN1534246A (en) * | 2003-03-31 | 2004-10-06 | 刘鸿才 | Water source heat pump constant temperature constant humidity machine set |
| CN201022262Y (en) * | 2007-03-16 | 2008-02-20 | 白桂俊 | Constant temperature seeds germinating apparatus |
| CN102012157A (en) * | 2010-12-02 | 2011-04-13 | 蓬莱京鲁渔业有限公司 | Energy-efficient drying system |
| CN102105189A (en) * | 2008-05-27 | 2011-06-22 | 菲舍尔和佩克尔保健有限公司 | Control of humidifier chamber temperature for accurate humidity control |
| CN206523033U (en) * | 2017-02-15 | 2017-09-26 | 杭州金山仪表阀业有限公司 | A kind of drying plant equipped with middle pressure steam temperature control equipment |
| CN206973859U (en) * | 2017-06-14 | 2018-02-06 | 珠海格力电器股份有限公司 | Heat exchange air duct structure and air conditioning unit |
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2018
- 2018-07-13 CN CN201810768959.8A patent/CN109005746B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534246A (en) * | 2003-03-31 | 2004-10-06 | 刘鸿才 | Water source heat pump constant temperature constant humidity machine set |
| CN201022262Y (en) * | 2007-03-16 | 2008-02-20 | 白桂俊 | Constant temperature seeds germinating apparatus |
| CN102105189A (en) * | 2008-05-27 | 2011-06-22 | 菲舍尔和佩克尔保健有限公司 | Control of humidifier chamber temperature for accurate humidity control |
| CN102012157A (en) * | 2010-12-02 | 2011-04-13 | 蓬莱京鲁渔业有限公司 | Energy-efficient drying system |
| CN206523033U (en) * | 2017-02-15 | 2017-09-26 | 杭州金山仪表阀业有限公司 | A kind of drying plant equipped with middle pressure steam temperature control equipment |
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Denomination of invention: A steam heating constant temperature and humidity generator Effective date of registration: 20230302 Granted publication date: 20210824 Pledgee: China Construction Bank Corporation Shuangfeng Sub-branch Pledgor: HUNAN NONGYOU MACHINERY GROUP Co.,Ltd.|HUNAN NONGYOU SHENGTAI AGRICULTURAL TECHNOLOGY CO.,LTD. Registration number: Y2023980033958 |
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Date of cancellation: 20231229 Granted publication date: 20210824 Pledgee: China Construction Bank Corporation Shuangfeng Sub-branch Pledgor: HUNAN NONGYOU MACHINERY GROUP Co.,Ltd.|HUNAN NONGYOU SHENGTAI AGRICULTURAL TECHNOLOGY CO.,LTD. Registration number: Y2023980033958 |
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