A ventilation and temperature control device for a rice experimental greenhouse shed

Abstract

The application discloses a kind of ventilation temperature control device of rice experimental greenhouse greenhouse in the technical field of rice heat resistance test equipment, including heat preservation test booth, the top of heat preservation test booth is fixedly connected with ventilation duct, the middle of ventilation duct is fixedly sleeved with cold air pipe, ventilation duct and the middle of cold air pipe are evenly connected with temperature regulating partition, temperature regulating partition is evenly separated into multiple temperature regulating chambers in ventilation duct, the bottom of temperature regulating chamber is provided with air inlet;The application is by adding temperature regulating movable pipe control cold air pipe and hot air pipe in the proportion of cold and hot air, so as to realize the implementation of temperature control in heat preservation test booth;By adding temperature regulating movable pipe control cold air pipe and hot air pipe in the proportion of cold and hot air, so as to realize the real-time control of temperature in heat preservation test booth;By being sleeved with movable temperature regulating piston at the bottom of temperature control pipe, the stable temperature when the test greenhouse is ventilated can be freely adjusted according to test demand.

Description

Technical Field

[0001] This invention relates to the field of rice heat resistance testing equipment, and in particular to a rice experimental greenhouse. Background Technology

[0002] The rice temperature tolerance test aims to determine the impact of high temperature or severe cold on the rice grain setting rate. Therefore, the temperature control and maintenance requirements for the rice planting test greenhouse are relatively high. Existing test greenhouses are simply plastic film and frame support structures with few internal facilities and no precise temperature control and insulation equipment. The temperature loss rate is high, which is not conducive to the rice temperature tolerance test. Therefore, to ensure the success of the test, strict temperature control and insulation of the test greenhouse are necessary. In current traditional greenhouses, ventilation is carried out by pre-leaving several openings between the greenhouse roof wall and the insulation plastic film. When ventilation is needed, an opening is manually pulled between the insulation plastic film and the wall for ventilation.

[0003] Existing ventilation methods are manually operated, which is inconvenient to open and close; moreover, they cannot control the temperature inside the greenhouse, which can easily cause temperature fluctuations during ventilation, affecting the success rate of rice temperature tolerance tests. In windless weather, even if ordinary temperature control vents are opened, they have little impact on the greenhouse, resulting in low ventilation efficiency and making it difficult to achieve good ventilation effects. Furthermore, the heat exchange efficiency between different locations inside the experimental greenhouse and the outside is inconsistent. The middle section of the experimental greenhouse has better heat preservation, while the ends lose heat more quickly, resulting in uneven temperature inside the experimental greenhouse. This makes it difficult to ensure the consistency of temperature conditions in the rice temperature tolerance test, which is not conducive to the conduct of the temperature tolerance test. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a ventilation and temperature control device for rice experimental greenhouses, solving the problem of inconvenient temperature control within greenhouses in existing technologies.

[0005] The objective of this invention is achieved as follows: A ventilation and temperature control device for a rice experimental greenhouse, comprising:

[0006] The thermal insulation test shed has air vents at the bottom.

[0007] The air duct assembly includes a ventilation duct installed at the top of the insulation test shed. The bottom of the ventilation duct is provided with an air inlet that connects to the insulation test shed. The middle of the ventilation duct is provided with a cold air duct that penetrates the insulation test shed. Hot air ducts that penetrate the insulation test shed are provided on both sides of the ventilation duct. The cold air duct and the hot air duct are connected by a temperature regulating pipe. The temperature regulating pipe is connected to the temperature regulating port of the ventilation duct on both sides.

[0008] The temperature control component includes a temperature control moving tube disposed inside the temperature control tube. The temperature control moving tube is divided into a hot air section and a cold air section by a hot and cold baffle in the middle. The hot air section has a hot air outlet on its side that matches the temperature control port, and the cold air section has a cold air outlet on its side that matches the temperature control port. The temperature control component controls the movement of the temperature control moving tube to change the opening between the temperature control port and the hot air outlet and the cold air outlet, thereby adjusting the hot air and cold air intake volume.

[0009] The temperature control assembly includes a temperature-adjusting spring disposed between the end of the hot air duct section and the hot air duct. A temperature control tube is located at the bottom of the temperature control tube at the position of the temperature control moving tube. A temperature control piston is disposed inside the temperature control tube. The top surface of the temperature control piston is machined into an inclined surface. The bottom of the temperature control moving tube is machined with an inclined groove that mates with the top surface of the temperature control piston. The horizontal movement of the temperature control moving tube is driven by the vertical movement of the temperature control piston. A temperature control shaft is threadedly connected to the bottom of the temperature control tube. A temperature control turntable is connected to the upper end of the temperature control shaft.

[0010] Furthermore, the ventilation duct is divided into several temperature-controlled chambers by temperature-controlled partitions, each temperature-controlled chamber corresponding to a temperature-controlled pipe, a set of temperature-controlled components, a set of temperature control components, and an air inlet.

[0011] Furthermore, the main material of the thermal insulation test shed is thermal insulation glass.

[0012] Furthermore, when the temperature regulating spring is not under force, the temperature regulating moving tube is positioned in the middle of the temperature regulating tube, on the side of the cold air duct.

[0013] Furthermore, the length of the temperature-regulating piston is longer than the height of the temperature-regulating chamber.

[0014] Furthermore, the angle at which the inclined groove at the bottom of the temperature-regulating moving tube is opened is such that it is closer to the cold air duct side and closer to the hot air duct side.

[0015] Furthermore, one end of each of the two hot air pipes is connected to a hot air blower, and the other ends of the two hot air pipes are connected by a bend.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This invention maintains the temperature inside the insulation test shed by installing hot air pipes on the top of the shed and circulating hot air within the pipes; it also achieves real-time temperature control by adding a temperature-regulating movable control to regulate the ratio of hot and cold air entering the cooling and hot air pipes; and by attaching a movable temperature-regulating piston to the bottom of the temperature control pipe, the stable temperature during ventilation inside the test shed can be freely adjusted according to experimental needs.

[0018] 2. This invention replaces traditional plastic greenhouses with test sheds made of insulated glass, reducing the temperature fluctuations inside the greenhouse during the temperature resistance test. At the same time, hot air pipes are installed on the top of the test shed, and the circulating hot air inside the pipes maintains the temperature inside the insulated test shed, ensuring that the temperature inside the insulated test shed remains at the test temperature throughout the test, thus avoiding the failure of the rice temperature resistance test due to drastic temperature fluctuations inside the insulated test shed.

[0019] 3. This invention establishes a temperature control chamber where cold and hot air pipes intersect within the ventilation duct, and adds a temperature control mechanism to regulate the ratio of cold and hot air entering the cooling and hot air pipes. This allows for real-time temperature control within the heat-insulating test shed, maintaining the required test temperature during the rice heat resistance test and preventing the temperature inside the test shed from dropping due to ventilation, which would affect the test results.

[0020] 4. This invention, by attaching a movable temperature-regulating piston to the bottom of the temperature control tube, allows the stable temperature during ventilation in the experimental greenhouse to be freely adjusted according to experimental needs. At the same time, the ventilation temperature at different locations can be set independently to avoid uneven temperature in different locations within the greenhouse caused by inconsistent heat exchange efficiency between different locations and the outside. This makes the experimental greenhouse more suitable for the experimental requirements of rice temperature tolerance tests. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a plan view of the ventilation structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 3 For the present invention Figure 1 A magnified view of the structure at point A in the middle.

[0025] Figure 4 This is a vertical cross-sectional view of the overall structure of the present invention.

[0026] Figure 5 This is a cross-sectional view of the overall structure of the present invention.

[0027] Figure 6 For the present invention Figure 4 A magnified view of the structure at point B in the middle.

[0028] Figure 7 For the present invention Figure 4 A magnified view of the structure at point C.

[0029] In the diagram: 1. Thermal insulation test shed; 2. Ventilation duct; 21. Temperature control partition; 22. Air inlet; 3. Cold air duct; 31. Cold air blower; 4. Heating room; 41. Hot air blower; 5. Hot air duct; 6. Temperature control tube; 61. Temperature control spring; 62. Temperature control tube; 63. Temperature control piston; 7. Temperature control moving tube; 71. Hot and cold partition; 72. Hot air outlet; 73. Cold air outlet; 8. Air outlet; 9. Temperature control shaft; 91. Temperature control piston; 92. Temperature control turntable. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The figure shows a ventilation and temperature control device for a rice experimental greenhouse, including an insulated experimental shed 1. The main material of the insulated experimental shed 1 is insulated glass, which ensures normal light exposure for the rice inside the shed while greatly improving the temperature maintenance effect, thus guaranteeing the experimental temperature environment for rice temperature tolerance tests. A ventilation duct 2 is fixedly connected to the top of the insulated experimental shed 1, and a cold air pipe 3 is fixedly connected to the middle of the ventilation duct 2. Temperature-regulating partitions 21 are evenly connected between the ventilation duct 2 and the cold air pipe 3, dividing the ventilation duct 2 into multiple temperature-regulating chambers. The bottom of each temperature-regulating chamber has an air inlet 22 that communicates with the interior of the insulated experimental shed 1. A heating chamber 4 is fixedly connected to one side of the exterior of the insulated experimental shed 1. Heating equipment is installed in the heating chamber 4 to heat the air entering the heating chamber 4. A hot air blower 41 is fixedly installed on one side of the heating chamber 4. The hot air blower 41 pumps the outside air into the heating chamber 4 for heating. Hot air pipes 5 are fixedly connected to both sides of the ventilation duct 2. One end of the two hot air pipes 5 is connected by a bend, and the other end of the two hot air pipes 5 is connected to the heating equipment in the heating chamber 4. The warm air generated in the heating chamber 4 is circulated in the hot air pipes 5, thereby achieving heat preservation in the heat preservation test shed 1 and maintaining the temperature in the heat preservation test shed 1. This ensures that the temperature in the heat preservation test shed 1 is always maintained at the test temperature during the test, and avoids the failure of the rice heat resistance test due to drastic temperature fluctuations in the heat preservation test shed 1.

[0032] Please see Figure 3-4A temperature regulating pipe 6 is fixedly connected to the inner side of the hot air duct 5. The temperature regulating pipe 6 passes through the temperature regulating chamber and connects to the cold air duct 3. A temperature regulating moving pipe 7 is movably sleeved in the middle of the temperature regulating pipe 6. The temperature regulating moving pipe 7 is divided into a hot air section and a cold air section by a hot and cold baffle 71 in the middle. A hot air outlet 72 matching the temperature regulating port is opened on the side of the hot air section, and a cold air outlet 73 matching the temperature regulating port is opened on the side of the cold air section. A temperature regulating spring 61 is fixedly installed on one side of the temperature regulating moving pipe 7. The other end of the temperature regulating spring 61 is fixedly connected to the hot air duct 5. When the temperature regulating spring 61 is not under force, the temperature regulating moving pipe 7 is positioned in the middle of the temperature regulating pipe 6, slightly towards the side of the cold air duct 3. A hot and cold baffle 71 is fixedly connected in the middle of the temperature regulating moving pipe 7 to isolate the hot air from the hot air duct 5 side and the cold air from the cold air duct 3 side. Hot air outlet 72 and cold air outlet 73 are respectively opened on the side. Hot air outlet 72 is located on the outside of the hot and cold partition 71, and cold air outlet 73 is located on the inside of the hot and cold partition 71. Temperature regulating pipe 6 has a temperature regulating port connected to the temperature regulating chamber at the positions corresponding to hot air outlet 72 and cold air outlet 73. Under normal ventilation conditions, the warm air introduced from the hot air pipe 5 and the cold air introduced from the cold air pipe 3 are mixed in the ventilation duct 2 after passing through the hot air outlet 72 and the cold air outlet 73 on the temperature regulating moving pipe 7, and then introduced into the heat insulation test shed 1 through the air inlet 22. This is to avoid the problem that the temperature inside the heat insulation test shed 1 will drop due to the direct introduction of cold air from the outside during the ventilation process, which would lower the test temperature and cause the test to fail. Air outlets 8 are opened at the bottom of both sides of the heat insulation test shed 1 to discharge the waste gas inside the heat insulation test shed 1.

[0033] Please see Figure 5-6A temperature control tube 62 is fixedly connected to the bottom end of the temperature regulating tube 6. The top end of the temperature control tube 62 is connected to the temperature regulating tube 6. The bottom end of the temperature control tube 62 extends through the temperature regulating chamber into the insulation test shed 1. A temperature regulating piston 63 is movably sleeved in the middle of the temperature control tube 62. The length of the temperature regulating piston 63 is longer than the height of the temperature regulating chamber to ensure that the detection end of the temperature control tube 62 is entirely within the insulation test shed 1. The top surface of the temperature regulating piston 63 is inclined. The bottom of the temperature regulating moving tube 7 is provided with a sloping groove with the same inclination as the top surface of the temperature regulating piston 63. The opening angle of the sloping groove is closer to the cold air pipe 3 and closer to the hot air pipe 5. When the temperature at the temperature regulating tube 6 in the insulation test shed 1 is higher than the required test temperature, the air at the bottom of the temperature regulating piston 63 in the temperature control tube 62 heats up and expands, pushing the temperature regulating piston 63 upward. Its inclined top surface pushes the temperature regulating moving tube 7 towards the hot air pipe 5, thereby making the hot air outlet 72 and the side of the temperature regulating tube 6... The area of ​​the temperature regulating port decreases, while the area of ​​the cold air outlet 73 and the temperature regulating port increases. This reduces the warm air flow and increases the cold air volume, thus lowering the temperature of the mixed gas inside the temperature regulating chamber. Consequently, the temperature at the air inlet 22 of the temperature regulating chamber, which is then introduced into the insulation test shed 1, decreases, causing the temperature there to drop to the test temperature. Conversely, when the temperature at the temperature control pipe 62 inside the insulation test shed 1 is too low, the air pressure at the bottom of the temperature control pipe 62 is insufficient to support the weight of the temperature regulating piston 63, causing the temperature regulating piston 63 to slide downwards. The temperature regulating spring 61 pushes the temperature regulating moving pipe 7 to slide towards the side closer to the cold air pipe 3, increasing the area of ​​the temperature regulating port on the side of the hot air outlet 72 and the temperature regulating pipe 6, while decreasing the area of ​​the cold air outlet 73 and the temperature regulating port. This increases the warm air flow and decreases the cold air volume, ensuring that the temperature at the air inlet 22 of the temperature regulating chamber, which is then introduced into the insulation test shed 1, rises, causing the temperature there to return to the test temperature.

[0034] Please see Figure 7 The temperature control tube 62 has an adjustment port at its bottom, and a temperature adjustment shaft 9 is threadedly connected to the adjustment port. A temperature adjustment piston 91 is fixedly connected to the top of the temperature adjustment shaft 9, and a temperature adjustment turntable 92 is fixedly connected to the bottom of the temperature adjustment shaft 9. By rotating the temperature adjustment turntable 92, the height of the temperature adjustment piston 91 in the temperature control tube 62 is adjusted, thereby adjusting the air pressure in the temperature control tube 62, and thus adjusting the initial position of the temperature adjustment moving tube 7. This allows the ventilation device to be set with different stable temperatures to ensure the temperature requirements under different tests, thus making it suitable for rice temperature tolerance tests under different stable temperatures. The temperature adjustment turntables 92 can be connected by a linkage chain to achieve synchronous adjustment of multiple temperature adjustment shafts 9 to improve adjustment efficiency. The flow ratio of hot air outlets 72 and cold air outlets 73 in various parts of the heat insulation test shed 1 can also be adjusted independently to adapt to the changes in heat loss rate at different locations in the heat insulation test shed 1, avoiding the problem of uneven temperature in the heat insulation test shed 1 caused by the heat loss at both ends of the heat insulation test shed 1 being higher than that at the middle of the heat insulation test shed 1.

[0035] The working principle of the method of using this invention is as follows:

[0036] During use, turn on the cold air blower 31 and the hot air blower 41, allowing outdoor air to enter the insulation test shed 1 through the cold air duct 3 and the hot air duct 5 respectively. Then, turn on the heating equipment in the heating chamber 4, so that the air passing through the hot air duct 5 is heated by the heating equipment. The warm air circulates through the hot air duct 5 at the top of the insulation test shed 1, thereby improving the insulation effect of the insulation test shed 1. Simultaneously, the warm air in the hot air duct 5 passes through the temperature regulating pipe 6 to one side of the temperature regulating moving pipe 7, and enters the temperature regulating chamber through the hot air outlet 72. The cold air in the cold air duct 3 passes through the temperature regulating pipe 6 to the other side of the temperature regulating moving pipe 7, and enters the temperature regulating chamber through the cold air outlet 72. The gas enters the temperature control chamber through outlet 73, where the two gases mix and are injected into the insulation test chamber 1 through inlet 22. Excess waste gas is discharged through outlet 8. Rotating the temperature control turntable 92 adjusts the height of the temperature control piston 91, thereby pushing the temperature control piston 63 to adjust the stable position of the temperature control moving tube 7 within the temperature control tube 6, ensuring that the gas flow rates at the hot air outlet 72 and cold air outlet 73 meet the test temperature requirements. After adjustment, the temperature inside the insulation test chamber 1 can be stabilized to the required test temperature. When the temperature at the temperature control tube 6 inside the insulation test chamber 1 is higher than the required test temperature, the temperature control piston in the temperature control tube 62... The air at the bottom of piston 63 heats up and expands, pushing the temperature-regulating piston 63 upward. Its inclined top surface pushes the temperature-regulating moving pipe 7 towards the hot air pipe 5, thus reducing the area directly opposite the temperature-regulating port on the side of the hot air outlet 72 and the temperature-regulating port on the side of the temperature-regulating pipe 6, while increasing the area directly opposite the temperature-regulating port on the side of the cold air outlet 73. This reduces the warm air flow rate and increases the cold air flow rate, thereby lowering the temperature of the mixed gas inside the temperature-regulating chamber. Consequently, the temperature at the air inlet 22 of the temperature-regulating chamber entering the insulation test shed 1 decreases, causing the temperature at that location to drop to the test temperature. Conversely, when the temperature at the temperature control pipe 62 inside the insulation test shed 1 is too low, the temperature control pipe... The air pressure at the bottom of 62 is insufficient to support the weight of the temperature regulating piston 63, causing the temperature regulating piston 63 to slide downwards. The temperature regulating spring 61 pushes the temperature regulating moving tube 7 to slide towards the side of the cold air tube 3, which increases the area of ​​the temperature regulating port opened on the side of the hot air outlet 72 and the temperature regulating port on the side of the temperature regulating tube 6, and decreases the area of ​​the cold air outlet 73 and the temperature regulating port. The warm air flow rate increases and the cold air flow rate decreases, thereby ensuring that the temperature introduced into the heat-insulating test shed 1 at the air inlet 22 of the temperature regulating chamber rises, so that the temperature at that point rises back to the test temperature, thereby ensuring that all parts of the heat-insulating test shed 1 always maintain the temperature required for the rice heat resistance test.

[0037] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A ventilation and temperature control device for a rice experimental greenhouse, characterized in that, include: Thermal insulation test shed (1), with an air outlet (8) at the bottom; The air duct assembly includes a ventilation duct (2) installed at the top of the insulation test shed (1). The bottom of the ventilation duct (2) is provided with an air inlet (22) that connects to the insulation test shed (1). The middle of the ventilation duct (2) is provided with a cold air duct (3) that penetrates the insulation test shed (1). The two sides of the ventilation duct (2) are provided with hot air ducts (5) that penetrate the insulation test shed (1). The cold air duct (3) and the hot air duct (5) are connected by a temperature regulating pipe (6). The two sides of the temperature regulating pipe (6) are connected to the temperature regulating ports of the ventilation duct (2). The temperature control component includes a temperature control moving tube (7) installed inside the temperature control tube (6). The temperature control moving tube (7) is divided into a hot air tube (5) and a cold air tube (3) by a hot and cold baffle (71) in the middle. A hot air outlet (72) matching the temperature control port is opened on the side of the hot air tube (5), and a cold air outlet (73) matching the temperature control port is opened on the side of the cold air tube (3). The temperature control component controls the movement of the temperature control moving tube (7) to change the opening between the temperature control port and the hot air outlet (72) and the cold air outlet (73) to adjust the hot air and cold air intake volume. The temperature control assembly includes a temperature adjustment spring (61) located between the end of the hot air pipe (5) and the hot air pipe (5). The bottom of the temperature adjustment pipe (6) is provided with a temperature control pipe (62) located at the position of the temperature adjustment moving pipe (7). The temperature control pipe (62) is provided with a temperature adjustment piston (63). The top surface of the temperature adjustment piston (63) is machined into an inclined surface. The bottom of the temperature adjustment moving pipe (7) is machined with an inclined groove that matches the top surface of the temperature adjustment piston (63). The temperature adjustment moving pipe (7) moves horizontally by moving up and down through the temperature adjustment piston (63). The bottom of the temperature control pipe (62) is threadedly connected to a temperature adjustment shaft (9). The upper end of the temperature adjustment shaft (9) is connected to a temperature adjustment turntable (92). The ventilation duct (2) is divided into several temperature-controlled chambers by a temperature-controlled partition (21). Each temperature-controlled chamber corresponds to a temperature-controlled pipe (6), a set of temperature-controlled components, a set of temperature control components, and an air inlet (22). The length of the temperature regulating piston (63) is longer than the height of the temperature regulating chamber, and the detection end of the temperature control tube (62) is entirely inside the heat preservation test shed (1).

2. The ventilation and temperature control device for a rice experimental greenhouse according to claim 1, characterized in that, The main material of the thermal insulation test shed (1) is thermal insulation glass.

3. The ventilation and temperature control device for a rice experimental greenhouse according to claim 1, characterized in that, When the temperature regulating spring (61) is not under force, the temperature regulating moving tube (7) is positioned in the middle of the temperature regulating tube (6) on the side of the cold air tube (3).

4. The ventilation and temperature control device for a rice experimental greenhouse according to claim 1, characterized in that, The opening angle of the inclined groove at the bottom of the temperature regulating moving tube (7) is close to the side of the cold air tube (3) and close to the side of the hot air tube (5).

5. The ventilation and temperature control device for a rice experimental greenhouse according to claim 1, characterized in that, One end of each of the two hot air pipes (5) is connected to a hot air blower (41), and the other ends of the two hot air pipes (5) are connected by a bend.

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