High rack warehouse temperature adjusting device and method

Abstract

The invention provides a high-rack warehouse temperature adjusting device which comprises an air supply pipe, a temperature adjusting device, a temperature adjusting device, a temperature adjusting device and a temperature adjusting device, and the air supply pipe is provided with an air outlet close to the top of a high-rack warehouse; the output end of the fan is communicated with the air inlet of the air supply pipe; the heating unit is arranged close to the input end of the fan, and the heating unit is used for heating gas entering the fan; the air return pipe group is arranged below the air supply pipe, the air outlet end of the air return pipe group is communicated with the input end of the fan, a plurality of air return ports are formed in the air return pipe group, and the air return ports are distributed at a plurality of heights in the elevated warehouse; the temperature sensors are arranged in the air outlet and the return air inlets, and the temperature sensors are used for detecting the temperature of the positions where the temperature sensors are located; and the control system is electrically connected with the heating unit, the fan and the temperature sensors, and the control system is used for controlling the heating unit and the fan to operate according to the temperatures detected by the temperature sensors. According to the invention, the uniformity of the heating temperature of each part in the elevated warehouse can be improved. The invention further provides an elevated warehouse temperature adjusting method.

Description

Technical Field

[0001] The present invention relates to the field of storage environment control, and in particular to a temperature control device and method for an elevated warehouse. Background Art

[0002] In the field of warehousing technology, especially tobacco warehousing technology, high-bay warehouses and other large-space warehouses are increasingly used to store materials, such as high-bay warehouses for storing tobacco. In winter, air conditioners are used to heat the air in the high-bay warehouse, but hot air rises (forming thermal pressure) and cold air falls, causing large temperature differences at different heights in the high-bay warehouse. In addition, the temperature is lower at locations farther away from the air-conditioning outlet and near the wall. Moreover, different air temperatures will also lead to differences in humidity in the high-bay warehouse. The problem of poor uniformity of temperature and humidity in various parts of the warehouse gradually affects the quality of the materials. If the temperature and humidity inside the high-bay warehouse are uneven, the same batch of tobacco will be in different temperature and humidity environments. The quality of cigarette products produced using these tobaccos will also be uneven. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problem of uneven temperature in a high-bay warehouse. The present invention provides a temperature control device and method for a high-bay warehouse, which can improve the uniformity of the heating temperature in the high-bay warehouse.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a high-bay warehouse temperature control device, comprising:

[0005] Air supply pipe, which is provided with an air outlet, and the air outlet is set near the top of the elevated warehouse;

[0006] a fan, the output end of which is connected to the air inlet of the air supply duct;

[0007] A heating unit is provided near the input end of the fan and is used to heat the gas entering the fan;

[0008] The return air duct group is located below the supply air duct. The air outlet of the return air duct group is connected to the input end of the fan. The return air duct group is provided with multiple return air ports, each of which is distributed at multiple heights in the high-bay warehouse.

[0009] Multiple temperature sensors are installed in the air outlet and each return air outlet, and the temperature sensors are used to detect the temperature at their locations;

[0010] The control system is electrically connected to the heating unit, the fan and the temperature sensor, and is used to control the operation of the heating unit and the fan according to the temperature detected by each temperature sensor.

[0011] Optionally, the return air duct group includes a main duct and multiple branch ducts:

[0012] The main pipeline extends in the horizontal direction, and the air outlet end of the main pipeline is connected to the input end of the fan, and multiple air inlet interfaces are provided on the main pipeline;

[0013] Each branch pipe extends in a vertical direction, each branch pipe is connected to the corresponding air inlet interface, and each return air outlet is arranged at intervals in the vertical direction on the outer circumferential surface of the branch pipe.

[0014] Optionally, the return air outlet is divided into a first return air outlet, a second return air outlet and a third return air outlet, and the first return air outlet, the second return air outlet and the third return air outlet are arranged on the outer circumferential surface of the branch pipe in sequence from top to bottom.

[0015] Optionally, the control system includes:

[0016] a memory for storing a target temperature, a first preset temperature difference, a second preset temperature difference, and a third preset temperature difference, wherein the first preset temperature difference is a preset value of a temperature difference between a temperature at the first return air outlet and a temperature at the third return air outlet, the second preset temperature difference is a preset value of a temperature difference between a temperature at the air outlet and an average temperature, the average temperature is an average value of temperatures at all return air outlets, and the third preset temperature difference is a preset value of a temperature difference between the average temperature and the target temperature;

[0017] a processor electrically connected to the memory, the fan, the temperature sensor, and the heating unit, the processor being configured to retrieve from the memory the stored target temperature, the first preset temperature difference, the second preset temperature difference, and the third preset temperature difference, and control the heating unit to reduce output efficiency when the difference between the temperature at the first return air outlet and the temperature at the third return air outlet is greater than or equal to the first preset temperature difference, or when the difference between the temperature at the air outlet and the average temperature is greater than or equal to the second preset temperature difference, and control the fan to increase output efficiency;

[0018] and, when the difference between the temperature at the first return air outlet and the temperature at the third return air outlet is less than the first preset temperature difference, the temperature difference between the temperature at the air outlet and the average temperature is less than the second preset temperature difference, the target temperature is greater than the average temperature, and the difference between the target temperature and the average temperature is greater than or equal to the third preset temperature difference, controlling the heating unit to increase the output efficiency and controlling the fan to increase the output efficiency;

[0019] Also, when the difference between the temperature at the first return air outlet and the temperature at the third return air outlet is less than the first preset temperature difference, the temperature difference between the temperature at the air outlet and the average temperature is less than the second preset temperature difference, the target temperature is less than the average temperature, and the difference between the average temperature and the target temperature is greater than or equal to the third preset temperature difference, the heating unit is controlled to reduce the output efficiency, and the fan is controlled to reduce the output efficiency.

[0020] Optionally, the first preset temperature difference is 4-7°C, the second preset temperature difference is 2-5°C, and the third preset temperature difference is 3-6°C.

[0021] Optionally, the temperature at the first return air outlet is an average value of the temperatures at all first return air outlets, and the temperature at the third return air outlet is an average value of the temperatures at all third return air outlets.

[0022] An embodiment of the present invention further provides a temperature control method for any of the aforementioned temperature control devices, comprising:

[0023] Comparing the difference between the temperature at the first return air outlet and the temperature at the third return air outlet with the first preset temperature difference, and comparing the difference between the temperature at the air outlet and the average temperature with the second preset temperature difference;

[0024] If the temperature difference between the first return air outlet and the third return air outlet is greater than or equal to the first preset temperature difference, or the temperature difference between the temperature at the air outlet and the average temperature is greater than or equal to the second preset temperature difference, the output efficiency of the heating unit is reduced and the output efficiency of the fan is increased.

[0025] Optionally, it also includes:

[0026] If the difference between the temperature at the first return air outlet and the temperature at the third return air outlet is less than the first preset temperature difference, and the difference between the temperature at the air outlet and the average temperature is less than the second preset temperature difference, then compare the target temperature and the average temperature;

[0027] If the average temperature is lower than the target temperature, and the difference between the average temperature and the target temperature is greater than or equal to a third preset temperature difference, increasing the output efficiency of the heating unit and increasing the output efficiency of the fan;

[0028] If the average temperature is greater than the target temperature, and the difference between the average temperature and the target temperature is greater than or equal to a third preset temperature difference, the output efficiency of the heating unit is reduced, and the output efficiency of the fan is reduced.

[0029] Optionally, the first preset temperature difference is 4-7°C, the second preset temperature difference is 2-5°C, and the third preset temperature difference is 3-6°C.

[0030] Optionally, the temperature at the first return air outlet is an average value of the temperatures at all first return air outlets, and the temperature at the third return air outlet is an average value of the temperatures at all third return air outlets.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] In an embodiment of the present invention, the air outlet is arranged at the top of the elevated warehouse, and the return air outlet is arranged at various heights below the air supply duct. The fan drives the cold air at various heights in the elevated warehouse to flow in from the return air outlet, and after being heated by the heating unit, warm air is formed and discharged from the air outlet. In winter, low-temperature air at various heights can be pumped into the heating unit for heating, while the air pressure at various heights is reduced, so that the hot air output from the air outlet flows to various heights below the air supply duct. By arranging temperature sensors in each air outlet and return air outlet, it is convenient to collect the real-time temperature of the location where each temperature sensor is located, and the operation of the fan and heating unit is controlled according to the real-time temperature of each location, so as to enhance the uniformity of the heating temperature in the elevated warehouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic structural diagram of a temperature control device according to an embodiment of the present invention is shown;

[0034] Figure 2 A flow chart of a temperature adjustment method provided by an embodiment of the present invention is shown.

[0035] Reference numerals:

[0036] 1. Supply air duct, 2. Air outlet, 3. High-bay warehouse, 4. Fan, 5. Heating unit, 6. Return air duct group, 7. Return air outlet, 8. Temperature sensor, 9. Main duct, 10. Branch duct, 11. First return air outlet, 12. Second return air outlet, 13. Third return air outlet. DETAILED DESCRIPTION

[0037] The following is an explanation of the embodiments of the present invention by specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0038] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0040] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0041] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0042] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0043] The embodiment of the present invention provides a high-bay storage temperature control device, such as Figure 1 As shown, the system includes an air supply duct 1, a fan 4, a heating unit 5, a return air duct assembly 6, multiple temperature sensors 8, and a control system. The air supply duct 1 is provided with an air outlet 2, which is located near the top of the elevated warehouse 3. The output end of the fan 4 is connected to the air inlet of the air supply duct 1. The heating unit 5 is located near the input end of the fan 4 and is used to heat the gas entering the fan 4. The return air duct assembly 6 is located below the air supply duct 1, and the air outlet end of the return air duct assembly 6 is connected to the input end of the fan 4. The return air duct assembly 6 is provided with multiple return air ports 7, each of which is distributed at multiple heights within the elevated warehouse 3. Multiple temperature sensors 8 are located within the air outlet 2 and each return air port 7, and the temperature sensors 8 are used to detect the temperature at their respective locations. The control system is electrically connected to the heating unit 5, fan 4, and temperature sensors 8, and is used to control the operation of the heating unit 5 and fan 4 based on the temperature detected by each temperature sensor 8.

[0044] With the above technical solution, the air outlet 2 is located at the top of the elevated warehouse 3, so that the air outlet 2 is away from the materials stored in the elevated warehouse 3, preventing the formation of local high temperatures near the air outlet 2 and affecting the quality of the materials; at the same time, the return air outlet 7 is located at various heights below the air supply duct 1, so as to facilitate the absorption of low-temperature air at various heights in the elevated warehouse 3 into the heating unit 5 for heating. Specifically, in winter, the fan 4 drives the low-temperature air at various heights in the elevated warehouse 3 to flow in from the return air outlet 7, and after being heated by the heating unit 5, warm air is formed and discharged from the air outlet 2. The fan 4 drives the warm air to flow downward from the top of the elevated warehouse 3, so that the temperature at various locations in the elevated warehouse 3 gradually increases. At the same time, after the air at various heights in the elevated warehouse 3 flows into the air intake, the air pressure at various heights in the elevated warehouse 3 is reduced, facilitating the hot air output from the air outlet 2 to flow to various heights below the air supply duct 1, preventing the warm air from floating at the top of the elevated warehouse 3 and causing temperature stratification in the elevated warehouse 3, where the upper part is hot and the lower part is cold. By setting a temperature sensor 8 in each air outlet 2 and return air outlet 7, it is convenient to collect the real-time temperature of the location of each temperature sensor 8, and control the operation of the fan 4 and heating unit 5 according to the real-time temperature of each location to enhance the uniformity of the heating temperature in the high-bay warehouse 3.

[0045] Furthermore, if Figure 1 As shown, the return air duct group 6 includes a main duct 9 and a plurality of branch ducts 10. The main duct 9 extends in the horizontal direction, and the air outlet end of the main duct 9 is connected to the input end of the fan 4, and the main duct 9 is provided with a plurality of air inlet interfaces. Each branch duct 10 extends in the vertical direction, and each branch duct 10 is respectively connected to its corresponding air inlet interface, and each return air outlet 7 is arranged on the outer circumference of the branch duct 10 at intervals in the vertical direction. Specifically, each branch duct 10 is distributed near the columns and walls in the elevated warehouse 3. Since the temperature near the walls and columns is lower than the temperature at other locations, arranging each branch duct 10 near the columns and walls helps to preferentially absorb the cold air near the walls and columns, and allow the warm air to flow to the vicinity of the columns and walls. By arranging a plurality of branch ducts 10 connected to the main duct 9, the range of action of the temperature control device can be increased, and the temperature uniformity in the elevated warehouse 3 can be further improved.

[0046] Furthermore, the return air inlet 7 is divided into a first return air inlet 11, a second return air inlet 12 and a third return air inlet 13. The first return air inlet 11, the second return air inlet 12 and the third return air inlet 13 are arranged on the outer circumferential surface of the branch pipe 10 in sequence from top to bottom. Among them, the first return air inlet 11 is the return air inlet 7 with the highest height, the third return air inlet 13 is the return air inlet 7 with the lowest height, and the second return air inlet 12 is located between the first return air inlet 11 and the third return air inlet 13. In some embodiments of the present application, the opening diameter of the third return air inlet 13 is larger than the opening diameters of the second return air inlet 12 and the first return air inlet 11. Since the third return air inlet 13 is closest to the ground, the temperature around the third return air inlet 13 is the lowest and the temperature drops fastest. By increasing the opening diameter of the third return air inlet 13, the temperature control device can draw more cold air into the heating unit for heating, thereby improving the temperature rise speed and uniformity of the air temperature in the elevated warehouse. In addition, the height of the elevated warehouse 3 is greater than or equal to 20.5 meters, the height of the main duct 9 is greater than or equal to 16 meters, the height of the first return air vent 11 is 13 meters, the height of the second return air vent 12 is 7 meters, and the height of the third return air vent 13 is 1 meter. In other embodiments, the height of the elevated warehouse 3 is not unique, and the user can adjust the number of second return air vents 12 and the height of each return air vent 7 according to specific needs.

[0047] Furthermore, the control system includes a memory and a processor. The memory is used to store the target temperature T0, the first preset temperature difference t1, the second preset temperature difference t2, and the third preset temperature difference t3. The first preset temperature difference t1 is a preset value of the temperature difference between the temperature T1 at the first return air outlet 11 and the temperature T3 at the third return air outlet 13. The temperature T1 at the first return air outlet 11 is the average value of the temperatures at all first return air outlets 11, and the temperature T3 at the third return air outlet 13 is the average value of the temperatures at all third return air outlets 13. The second preset temperature difference t2 is a preset value of the temperature difference between the temperature Ts at the air outlet 2 and the average temperature T, wherein the average temperature T is the average value of the temperatures at all return air outlets 7. The third preset temperature difference t3 is a preset value of the temperature difference between the average temperature T and the target temperature T0.

[0048] The processor is electrically connected to the memory, the blower 4, the temperature sensor 8, and the heating unit 5 respectively. The processor is configured to retrieve the stored target temperature T0, the first preset temperature difference t1, the second preset temperature difference t2, and the third preset temperature difference t3 from the memory, and control the heating unit 5 to reduce the output efficiency and control the blower 4 to increase the output efficiency when T1 - T3 ≥ t1 or Ts - T ≥ t2. T1 - T3 ≥ t1 means that the temperature difference between the first return air outlet 11 and the third return air outlet 13 is greater than or equal to the first preset temperature difference, indicating that the situation of hot air at the upper layer and cold air at the lower layer has occurred in the high-bay warehouse 3, and the air temperature stratification is obvious. At this time, it is necessary to reduce the heating of the upper-layer air and mix the higher-temperature air in the upper layer with the lower-temperature air in the lower layer. Therefore, the processor controls the heating unit 5 to reduce the output efficiency to reduce the heating of the upper-layer air, and controls the blower 4 to increase the output power to blow the hot air in the upper layer to a lower height, enhancing the air mixing in the high-bay warehouse 3. Ts - T ≥ t2 means that the temperature difference between the temperature at the air outlet 2 and the average temperature is greater than or equal to the second preset temperature difference. At this time, a large instantaneous heating will occur, causing more warm air with a higher temperature to gather around the air outlet 2. Since the thermal pressure of the hot air is large and the hot air rises, the hot air will gather at the top of the high-bay warehouse 3 and cannot be mixed with the air below the high-bay warehouse 3. Therefore, it is necessary to reduce the output efficiency of the heating unit 5 to avoid generating intense instantaneous heating. At this time, increasing the output efficiency of the blower 4 can blow the warm air output from the air outlet 2 to various heights below and mix it evenly with the cold air, avoiding the phenomenon of cold and hot air stratification in the high-bay warehouse 3.

[0049] The processor can also control the heating unit 5 to increase the output efficiency and control the blower 4 to increase the output efficiency when T1 - T3 < t1, Ts - T < t2, T0 > T and T0 - T ≥ t3. T1 - T3 < t1 indicates that there is no phenomenon of cold and hot air stratification in the high-bay warehouse 3. Ts - T < t2 indicates that the temperature difference between the air output from the air outlet 2 and the average temperature is not large, and the heating unit 5 does not output a large instantaneous heating amount, and no cold and hot air stratification phenomenon will occur. If the average temperature has not reached the target temperature at this time and the temperature difference is greater than or equal to the third preset temperature difference, it means that the high-bay warehouse 3 still needs to be heated. Therefore, increase the output efficiency of the heating unit 5 to increase the heat generation of the temperature control device, and increase the output efficiency of the blower 4 to transport the air heated by the heating unit 5 into the high-bay warehouse 3.

[0050] The processor is also capable of controlling the heating unit 5 to reduce its output efficiency and controlling the blower 4 to reduce its output efficiency when T1 - T3 < t1, Ts - T < t2, T0 < T, and T - T0 ≥ t3. T1 - T3 < t1 indicates that there is no phenomenon of cold and hot air stratification in the high-bay warehouse 3. Ts - T < t2 indicates that the temperature difference between the air output from the air outlet 2 and the average temperature is not large, and the heating unit 5 does not output a strong instantaneous heating amount, so there will be no phenomenon of cold and hot air stratification. If at this time the average temperature is greater than the target temperature and the temperature difference is greater than or equal to the third preset temperature difference, it means that the temperature in the high-bay warehouse 3 has reached the standard and there is no need to continue heating. To maintain the temperature in the high-bay warehouse 3 and offset the heat dissipation of the wall of the high-bay warehouse 3, a small amount of heating still needs to be continued. Therefore, the heating unit 5 is controlled to reduce its output efficiency to reduce the heat generation of the temperature control device. Since there is no cold and hot stratification phenomenon in the high-bay warehouse 3 at this time and the output heat generation is reduced, controlling the blower 4 to reduce its output efficiency can meet the requirement of mixing air.

[0051] In some embodiments of the present application, the first preset temperature difference t1 is 4°C, the second preset temperature difference t2 is 2°C, and the third preset temperature difference t3 is 3°C. According to the spatial size of the high-bay warehouse 且3 and the types of stored materials inside, the user can also set the first preset temperature difference to 5°C, 6°C or 7°C, set the second preset temperature difference to 3°C, 4°C or 5°C, and set the third preset temperature difference to 4°C, 5°C or 6°C.

[0052] The embodiment of the present invention also provides a temperature control method for controlling any one of the foregoing temperature control devices, such as Figure 2 shown, including:

[0053] Set the target temperature T0, the first preset temperature difference t1, the second preset temperature difference t2, and the third preset temperature difference t3;

[0054] Compare the magnitudes of T1 - T3 and t1, and compare the magnitudes of Ts - T and t2;

[0055] If T1 - T3 ≥ t1 or Ts - T ≥ t2, then reduce the output efficiency of the heating unit 5 and increase the output efficiency of the blower 4.

[0056] When T1 - T3 ≥ t1, that is, the temperature difference between the first air return opening 11 and the third air return opening 13 is greater than or equal to the first preset temperature difference, it indicates that the situation of hot air above and cold air below has occurred in the elevated warehouse 3, and the temperature stratification is obvious. At this time, it is necessary to reduce the heating of the upper layer of air and mix the warmer air in the upper layer with the cooler air in the lower layer. Therefore, the processor controls the heating unit 5 to reduce the output efficiency to reduce the heating of the upper layer of air, and controls the fan 4 to increase the output power to blow the hot air in the upper layer to a lower height, enhancing the air mixing in the elevated warehouse 3. When Ts - T ≥ t2, that is, the temperature difference between the outlet 2 and the average temperature is greater than or equal to the second preset temperature difference, a large instantaneous heating will occur at this time, causing more warmer air with a higher temperature to gather around the outlet 2. Since the hot air has a greater thermal pressure and rises, the hot air will gather at the top of the elevated warehouse 3 and cannot be mixed with the air below the elevated warehouse 3. Therefore, it is necessary to reduce the output efficiency of the heating unit 5 to avoid generating intense instantaneous heating. At this time, increasing the output efficiency of the fan 4 can blow the warm air output from the outlet 2 to various lower heights and mix it evenly with the cold air, avoiding the phenomenon of cold and hot air stratification in the elevated warehouse 3.

[0057] Further, as Figure 2 shown, the temperature adjustment method further includes:

[0058] If T1 - T3 < t1 and Ts - T < t2, then compare the magnitudes of T0 and T; T1 - T3 < t1 indicates that there is no phenomenon of cold and hot air stratification in the elevated warehouse 3, and Ts - T < t2 indicates that the temperature difference between the air output from the outlet 2 and the average temperature is not large, and the heating unit 5 does not output a large instantaneous heating amount, and no phenomenon of cold and hot air stratification will occur. This indicates that the temperatures at various heights in the elevated warehouse 3 are basically uniform at this time, neither showing the phenomenon of cold and hot air stratification nor having the tendency of cold and hot air stratification. At this time, attention can be paid to whether the overall temperature in the elevated warehouse 3 reaches the target temperature.

[0059] If T0 > T and T0 - T ≥ t3, it means that the average temperature has not reached the target temperature at this time, and the temperature difference is greater than or equal to the third preset temperature difference, indicating that the elevated warehouse 3 still needs to be heated continuously. Therefore, increase the output efficiency of the heating unit 5 to increase the heat production of the temperature adjustment device, and increase the output efficiency of the fan 4 to deliver the air heated by the heating unit 5 into the elevated warehouse 3. During the continuous heating of the air in the elevated warehouse 3, it is necessary to prevent overheating and avoid the average temperature exceeding the target temperature by a large temperature difference. Therefore, it is still necessary to continue comparing the magnitudes of T0 and T.

[0060] If T0 > T and T0 - T < t3, it indicates that the average temperature has not yet reached the target temperature at this time, and the average temperature is already relatively close to the target temperature. At this time, there is no need to heat the air in the elevated warehouse 3 violently, but only slow heating is required to slowly raise the temperature in the elevated warehouse 3 above the target temperature. At this time, it is necessary to prevent the phenomenon of cold and hot air stratification in the elevated warehouse 3 caused by excessive heat dissipation from the walls and the bottom surface. Therefore, it is necessary to continue to compare the magnitudes of T1 - T3 and t1, as well as compare the magnitudes of Ts - T and t2. Make adjustments immediately when the phenomenon or trend of cold and hot air stratification occurs to make the air temperature at each height in the elevated warehouse 3 more uniform.

[0061] If T > T0 and T - T0 ≥ t3, it indicates that the air temperature in the elevated warehouse 3 has reached the standard. Therefore, control the heating unit 5 to reduce the output efficiency to reduce the heat generation of the temperature control device. Because there is no phenomenon of cold and hot stratification in the elevated warehouse 3 at this time, and the output heat generation is reduced, controlling the fan 4 to reduce the output efficiency can meet the requirement of mixing the air. Moreover, when the heating unit 5 operates at a lower output power, it is not easy to出现 the phenomenon of cold and hot air stratification in the elevated warehouse 3.

[0062] If T > T0 and T - T0 < t3, it indicates that the air temperature in the elevated warehouse 3 has reached the standard, and the average temperature is relatively close to the target temperature. At this time, there is no need to heat the air in the elevated warehouse 3 violently, but only maintain the original heating efficiency to slowly raise the temperature in the elevated warehouse 3 above the target temperature. At this time, it is necessary to prevent the phenomenon of cold and hot air stratification in the elevated warehouse 3 caused by excessive heat dissipation from the walls and the bottom surface. Therefore, it is necessary to continue to compare the magnitudes of T1 - T3 and t1, as well as compare the magnitudes of Ts - T and t2. Make adjustments immediately when the phenomenon or trend of cold and hot air stratification occurs to make the air temperature at each height in the elevated warehouse 3 more uniform.

[0063] In some embodiments of the present application, the first preset temperature difference t1 is 4°C, the second preset temperature difference t2 is 2°C, and the third preset temperature difference t3 is 3°C. According to the spatial size of the elevated warehouse 3 and the types of stored materials inside, the user can also set the first preset temperature difference to 5°C, 6°C, or 7°C, and set the second preset temperature difference to 3°C, 4°C, or 5°C. Set the third preset temperature difference to 4°C, 5°C, or 6°C.

[0064] Although the present invention has been illustrated and described by referring to certain preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A temperature control device for an elevated warehouse, characterized in that: include: An air supply pipe is provided with an air outlet, and the air outlet is arranged near the top of the elevated warehouse; a fan, the output end of which is connected to the air inlet of the air supply pipe; a heating unit, disposed near an input end of the blower, for heating the gas entering the blower; A return air duct group is provided below the supply air duct, the air outlet end of the return air duct group is connected to the input end of the fan, and the return air duct group is provided with a plurality of return air ports, each of which is distributed at a plurality of heights in the elevated warehouse; a plurality of temperature sensors, disposed in the air outlet and each of the return air outlets, the temperature sensors being used to detect the temperature at their locations; A control system is electrically connected to the heating unit, the fan and the temperature sensor, and the control system is used to control the operation of the heating unit and the fan according to the temperature detected by each temperature sensor.

2. The temperature control device according to claim 1, characterized in that The return air duct group includes a main duct and multiple branch ducts: The main pipeline extends in a horizontal direction, and the air outlet end of the main pipeline is connected to the input end of the fan, and the main pipeline is provided with a plurality of air inlet interfaces; Each of the branch pipes extends in a vertical direction, each of the branch pipes is respectively connected to the corresponding air inlet interface, and each of the return air ports is arranged at intervals in the vertical direction on the outer circumferential surface of the branch pipe.

3. The temperature control device according to claim 2, characterized in that The return air inlet is divided into a first return air inlet, a second return air inlet and a third return air inlet. The first return air inlet, the second return air inlet and the third return air inlet are sequentially arranged on the outer circumferential surface of the branch pipe from top to bottom.

4. The temperature control device according to claim 3, characterized in that The control system includes: a memory configured to store a target temperature, a first preset temperature difference, a second preset temperature difference, and a third preset temperature difference, wherein the first preset temperature difference is a preset value of a temperature difference between the temperature at the first return air outlet and the temperature at the third return air outlet, the second preset temperature difference is a preset value of a temperature difference between the temperature at the air outlet and an average temperature, the average temperature being an average value of the temperatures at all the return air outlets, and the third preset temperature difference is a preset value of a temperature difference between the average temperature and the target temperature; a processor electrically connected to the memory, the fan, the temperature sensor, and the heating unit, the processor being configured to retrieve a stored target temperature, a first preset temperature difference, a second preset temperature difference, and a third preset temperature difference from the memory, and control the heating unit to reduce an output efficiency when a difference between a temperature at the first return air outlet and a temperature at the third return air outlet is greater than or equal to the first preset temperature difference, or when a difference between a temperature at the air outlet and the average temperature is greater than or equal to the second preset temperature difference, and control the fan to increase an output efficiency; and, when the difference between the temperature at the first return air outlet and the temperature at the third return air outlet is less than the first preset temperature difference, the temperature difference between the temperature at the air outlet and the average temperature is less than the second preset temperature difference, the target temperature is greater than the average temperature, and the difference between the target temperature and the average temperature is greater than or equal to the third preset temperature difference, controlling the heating unit to increase the output efficiency and controlling the fan to increase the output efficiency; Furthermore, when the difference between the temperature at the first return air outlet and the temperature at the third return air outlet is less than the first preset temperature difference, the temperature difference between the temperature at the air outlet and the average temperature is less than the second preset temperature difference, the target temperature is less than the average temperature, and the difference between the average temperature and the target temperature is greater than or equal to the third preset temperature difference, the heating unit is controlled to reduce the output efficiency, and the fan is controlled to reduce the output efficiency.

5. The temperature control device according to claim 4, characterized in that The first preset temperature difference is 4-7°C, the second preset temperature difference is 2-5°C, and the third preset temperature difference is 3-6°C.

6. The temperature control device according to claim 5, characterized in that The temperature at the first return air outlet is an average of the temperatures at all the first return air outlets, and the temperature at the third return air outlet is an average of the temperatures at all the third return air outlets.

7. A temperature control method for a temperature control device according to any one of claims 4 to 6, characterized in that: include: Comparing the difference between the temperature at the first return air outlet and the temperature at the third return air outlet with the first preset temperature difference, and comparing the difference between the temperature at the air outlet and the average temperature with the second preset temperature difference; If the temperature difference between the first return air outlet and the third return air outlet is greater than or equal to the first preset temperature difference, or the temperature difference between the temperature at the air outlet and the average temperature is greater than or equal to the second preset temperature difference, the output efficiency of the heating unit is reduced and the output efficiency of the fan is increased.

8. The temperature control method according to claim 7, wherein: Also includes: If the difference between the temperature at the first return air outlet and the temperature at the third return air outlet is less than the first preset temperature difference, and the difference between the temperature at the air outlet and the average temperature is less than the second preset temperature difference, then comparing the target temperature with the average temperature; If the average temperature is lower than the target temperature, and the difference between the average temperature and the target temperature is greater than or equal to the third preset temperature difference, increasing the output efficiency of the heating unit and increasing the output efficiency of the fan; If the average temperature is greater than the target temperature, and the difference between the average temperature and the target temperature is greater than or equal to the third preset temperature difference, the output efficiency of the heating unit is reduced, and the output efficiency of the fan is reduced.

9. The temperature control method according to claim 8, wherein: The first preset temperature difference is 4-7°C, the second preset temperature difference is 2-5°C, and the third preset temperature difference is 3-6°C.

10. The temperature control method according to claim 9, wherein: The temperature at the first return air outlet is an average of the temperatures at all the first return air outlets, and the temperature at the third return air outlet is an average of the temperatures at all the third return air outlets.

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