Granary air conditioning unit with temperature and humidity regulation and fresh air function

Abstract

The present invention provides an air conditioning unit for a granary with temperature and humidity regulation and fresh air functions. The air conditioning unit for a granary includes a frame, and an air processing chamber at the lower layer and an air supply chamber, an exhaust chamber and a return chamber above the air processing chamber are formed inside the frame. The air conditioning unit for a granary with temperature and humidity regulation and fresh air functions provided by the present invention arranges the air processing chamber, the air supply chamber, the exhaust chamber and the return chamber reasonably to minimize the occupied space of the unit, and arranges the air supply fan, the preheating coil, the cooling coil and the heating coil in sequence to form an optimal combination scheme for optimized arrangement and reduced length, and at the same time, the inlet and outlet water pipes are all concentrated inside the frame, overcoming the problems of the conventional scheme that the pipe system is exposed outside the box, the unit is wide, the floor space is large, and the pipe system is easily damaged during construction, and the volume of the unit is minimized to meet the use requirements of harsh environments such as ships.

Description

Technical Field

[0001] The invention relates to the technical field of air treatment equipment for grain storage devices, in particular to an air conditioning unit for grain storage with temperature and humidity regulation and fresh air functions. Background Art

[0002] When ships sail on the ocean, they need to carry a large amount of food to provide life support for the crew. In order to ensure that the food can be stored for a long time, it is necessary to design a special food warehouse air conditioning device to ensure a reasonable temperature and humidity in the warehouse. In addition, the space on the ship is precious and the equipment size requirements are strict. The transmission air conditioning unit is too large and heavy to be directly used on the ship. Summary of the invention

[0003] In order to solve the technical problem that the space on the ship is precious and the air-conditioning unit is too large to be directly used, an air-conditioning unit for granary is provided which ensures that the unit size meets the requirements of the ship.

[0004] An air conditioning unit for a granary comprises a frame, wherein an air handling chamber at a lower layer and an air supply chamber, an exhaust chamber and a return air chamber above the air handling chamber are formed inside the frame, a fresh air outlet is arranged on the air handling chamber, the air supply chamber is connected with the air handling chamber, the return air chamber has a first state in which the return air chamber is connected with the exhaust chamber and disconnected with the air handling chamber and a second state in which the return air chamber is connected with the air handling chamber and disconnected with the exhaust chamber, and the exhaust chamber and the fresh air outlet are both connected with the outside air.

[0005] The return air chamber is provided with a return air valve and an exhaust air valve, and in the first state, the return air valve is in a closed state and the exhaust air valve is in an open state, and in the second state, the exhaust air valve is in a closed state and the return air valve is in an open state.

[0006] The granary air conditioning unit has a closed cycle mode and a ventilation mode:

[0007] In the closed cycle mode, the return air valve is opened, the exhaust valve and the fresh air port are closed, and the gas in the granary flows back into the granary through the return air chamber, the air processing chamber and the air supply chamber in sequence;

[0008] In the ventilation mode, the return air valve is closed, the exhaust valve and the fresh air inlet are both opened, the gas in the granary passes through the return air chamber and the exhaust air chamber in turn and enters the outside, and the outside air passes through the fresh air inlet, the air processing chamber and the air supply chamber in turn and flows into the granary.

[0009] The air supply chamber, the air exhaust chamber and the air return chamber are arranged in sequence along the length direction of the frame, and the air return chamber is located between the fresh air inlet and the air exhaust chamber.

[0010] The air handling chamber is provided with an air blower, a preheating coil, a cooling coil and a heating coil in sequence along the length direction of the frame, and the air inlet of the air blower is switchedly connected with the return air chamber and the fresh air outlet.

[0011] A cold water valve is provided on the cooling coil, a hot water valve is provided on the heating coil, and the air-conditioning unit for the granary has a first preset temperature and a second preset temperature, the second preset temperature is greater than the first preset temperature, and when the temperature of the air flow passing through the blower is lower than the first preset temperature, the hot water valve is fully opened and the cold water valve is fully closed, when the temperature of the air flow passing through the blower is higher than the second preset temperature, the hot water valve is fully closed and the cold water valve is fully opened, and when the temperature of the air flow passing through the blower is between the first preset temperature and the second preset temperature, the opening of the hot water valve and the opening of the cold water valve are dynamically adjusted.

[0012] When the temperature of the environment in which the granary air conditioning unit is located is lower than 0° C., the preheating coil is preheated.

[0013] The air conditioning unit for the granary also includes a third preset temperature, which is greater than 0°C and less than the first preset temperature. When the temperature of the environment in which the air conditioning unit for the granary is located is higher than the third preset temperature, the preheating coil stops preheating.

[0014] The temperature value of the first preset temperature is 8° C., the temperature value of the second preset temperature is 16° C., and the temperature value of the third preset temperature is 6° C.

[0015] The preheating coil, the cooling coil and the heating coil are all provided with inlet and outlet water pipes, all of the inlet and outlet water pipes are arranged inside the frame, and ends of all of the inlet and outlet water pipes are exposed outside the frame.

[0016] The air conditioning unit for the granary also includes an electric control box, which is arranged between the air supply cavity and the air exhaust cavity, and the electric control box is fixedly arranged on the air supply cavity.

[0017] An exhaust fan is arranged in the exhaust cavity, and the exhaust fan is in working state in the ventilation mode.

[0018] The air conditioning unit for the granary also includes a remote control mechanism, which is arranged in the electric control box and communicates with a superior monitoring system.

[0019] A humidifier is also arranged in the air processing chamber.

[0020] The air conditioning unit for a granary is applied to an offshore platform, a ship or a land grain storehouse.

[0021] The air-conditioning unit for granary with temperature and humidity regulation and fresh air functions provided by the present invention reasonably arranges the air processing chamber, the air supply chamber, the exhaust chamber and the return air chamber to minimize the occupied space of the unit, and the air supply fan, the preheating coil, the cooling coil and the heating coil are arranged in sequence to form an optimal combination scheme for optimized layout to reduce the length, and at the same time, the inlet and outlet water pipes are concentrated inside the frame, thereby overcoming the problems of the conventional scheme in which the pipe system is exposed outside the box, the unit is wide, the floor area is large, and the pipe system is easily damaged during construction, and the volume of the unit is minimized to meet the use requirements of harsh environments such as ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of an air conditioning unit for a granary with temperature and humidity adjustment and fresh air functions according to an embodiment of the present invention;

[0023] In the figure:

[0024] 1. Frame; 2. Air handling chamber; 3. Supply air chamber; 4. Exhaust air chamber; 5. Return air chamber; 51. Return air valve; 52. Exhaust air valve; 21. Fresh air inlet; 22. Supply air fan; 23. Preheating coil; 24. Cooling coil; 25. Heating coil; 6. Exhaust fan. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] like Figure 1 The granary air conditioning unit shown in the figure comprises a frame 1, wherein an air processing chamber 2 at the lower layer and an air supply chamber 3, an exhaust chamber 4 and a return chamber 5 above the air processing chamber 2 are formed inside the frame 1, a fresh air outlet 21 is arranged on the air processing chamber 2, the air supply chamber 3 is connected with the air processing chamber 2, the return air chamber 5 has a first state connected with the exhaust chamber 4 and disconnected from the air processing chamber 2 and a second state connected with the air processing chamber 2 and disconnected from the exhaust chamber 4, the exhaust chamber 4 and the fresh air outlet 21 are both connected with the outside air The air handling chamber 2 and the air supply chamber 3, the exhaust chamber 4 and the return air chamber 5 are arranged vertically, and the air handling chamber 2 with too large a size requirement is arranged side by side with the air supply chamber 3, the exhaust chamber 4 and the return air chamber 5 with smaller size requirements, so as to ensure that the box body has a uniform appearance, compact size and minimum floor space. At the same time, the return air chamber 5 is arranged in a form of switchable connection with the exhaust chamber 4 and the air handling chamber 2. While ensuring that the gas in the granary is exhausted or processed as needed, the space occupied by the return air structure can be reduced, thereby minimizing the volume of the air conditioning unit for the granary.

[0027] The return air chamber 5 is provided with a return air valve 51 and an exhaust air valve 52, and in the first state, the return air valve 51 is in a closed state and the exhaust air valve 52 is in an open state, and in the second state, the exhaust air valve 52 is in a closed state and the return air valve 51 is in an open state. By switching the return air valve 51 and the exhaust air valve 52, the flow direction of the gas in the granary is controlled, thereby meeting the purpose of ventilation and temperature and humidity control of the granary.

[0028] The granary air conditioning unit has a closed cycle mode and a ventilation mode:

[0029] In the closed cycle mode, the return air valve 51 is opened, the exhaust valve 52 and the fresh air port 21 are closed, and the air in the granary flows back to the granary through the return air chamber 5, the air processing chamber 2 and the air supply chamber 3 in sequence. At this time, only the temperature and humidity of the air in the granary are controlled, and there is no fresh air inflow;

[0030] In the ventilation mode, the return air valve 51 is closed, the exhaust valve 52 and the fresh air inlet 21 are both opened, the gas in the granary passes through the return air chamber 5 and the exhaust chamber 4 in turn and then enters the outside, and the outside air passes through the fresh air inlet 21, the air processing chamber 2 and the air supply chamber 3 in turn and then flows into the granary, thereby achieving the purpose of ventilation in the granary.

[0031] The air supply chamber 3, the air exhaust chamber 4 and the air return chamber 5 are arranged along the length direction of the frame 1 ( Figure 1 The return air chamber 5 is located between the fresh air outlet 21 and the exhaust air chamber 4. The supply air chamber 3, the exhaust air chamber 4 and the return air chamber 5 are reasonably arranged to ensure a neat appearance and compact size of the unit.

[0032] The air processing chamber 2 is provided with an air blower 22, a preheating coil 23, a cooling coil 24 and a heating coil 25 in sequence along the length direction of the frame 1. The air inlet of the air blower 22 is switched and connected with the return air chamber 5 and the fresh air outlet 21, so that the return air of the granary and the fresh air from the outside can enter the air supply chamber 3 after being processed by the preheating coil 23, the cooling coil 24 and the heating coil 25 under the conveying action of the air blower 22, thereby ensuring that the temperature and humidity of the gas entering the granary meet the needs of the granary.

[0033] The cooling coil 24 is provided with a cold water valve, the heating coil 25 is provided with a hot water valve, and the air conditioning unit for the granary has a first preset temperature and a second preset temperature, the second preset temperature is greater than the first preset temperature, and when the temperature of the air flow passing through the blower 22 is lower than the first preset temperature, the hot water valve is fully opened and the cold water valve is fully closed, when the temperature of the air flow passing through the blower 22 is higher than the second preset temperature, the hot water valve is fully closed and the cold water valve is fully opened, when the temperature of the air flow passing through the blower 22 is between the first preset temperature and the second preset temperature, the opening of the hot water valve and the opening of the cold water valve are dynamically adjusted, the cold water valve is used to control whether the cooling coil 24 is cooled, and the hot water valve is used to control whether the heating coil 25 is heated, so that the temperature and humidity are dynamically adjusted according to the temperature of the air flow entering the blower 22 to meet the temperature and humidity requirements in the granary.

[0034] In winter, the change of the sailing sea area and weather causes the outdoor fresh air temperature to change greatly, such as changing in the range of -18℃ to 10℃. When the outdoor fresh air temperature is too low, such as below 0℃, the fresh air is directly sent into the unit, which will cause the unit coil to freeze and crack. When the temperature of the environment where the grain silo air conditioning unit is located is below 0℃, the preheating coil 23 is preheated so that the temperature of the fresh air will not cause the problem of ice and cracking of the coil.

[0035] The air-conditioning unit for the granary also includes a third preset temperature, which is greater than 0°C and less than the first preset temperature. When the temperature of the environment in which the air-conditioning unit for the granary is located is higher than the third preset temperature, the preheating coil 23 stops preheating. At this time, the temperature of the fresh air will not cause the risk of freezing of the coil when passing through the coil, so there is no need to preheat the fresh air.

[0036] The temperature value of the first preset temperature is 8° C., the temperature value of the second preset temperature is 16° C., and the temperature value of the third preset temperature is 6° C.

[0037] In closed loop mode, the cold water valve is automatically PID controlled according to the detected return air relative humidity and the target relative humidity. The hot water valve is automatically PID controlled according to the detected return air temperature and the return air set temperature. The two valves are controlled independently.

[0038] In the ventilation cycle mode, the return air and exhaust air are used to exhaust air, the fresh air is used to intake air, and the supply air is used to deliver the processed airflow to the grain warehouse. Specifically:

[0039] Detect the ambient temperature. If the ambient temperature is lower than the set value (6°C), the preheating coil is turned on for residual heat. If it is equal to or higher than the set value, the preheating coil is turned off.

[0040] Set a temperature range of 8-16℃. When the return air temperature is lower than 8℃, the heating coil 25 starts heating and the opening is adjusted to the maximum, and the cooling coil 24 stops working.

[0041] When the return air temperature is between 8-16°C, the heating coil 25 and the cooling coil 24 are dynamically adjusted.

[0042] When the return air temperature is higher than 16°C, the cooling coil 24 is cooled and the opening is adjusted to the maximum, and the heating coil 25 stops working.

[0043] The preheating coil 23, the cooling coil 24 and the heating coil 25 are all provided with inlet and outlet water pipes, all of which are arranged inside the frame 1, and the ends of all of the inlet and outlet water pipes are exposed to the outside of the frame 1. All of the inlet and outlet water pipes are integrated into the frame 1, and only the ends of the inlet and outlet water pipes are arranged on the frame 1, thereby reducing the space occupied by the inlet and outlet water pipes and further reducing the volume of the unit.

[0044] The air conditioning unit for the granary further includes an electric control box, which is arranged between the air supply cavity 3 and the air exhaust cavity 4, and is fixedly arranged on the air supply cavity 3, and is embedded in the static pressure box by utilizing the gap of the unit's box body, thereby reducing the width of the unit and ensuring that the overall width of the unit is small.

[0045] An exhaust fan 6 is disposed in the exhaust cavity 4, and the exhaust fan 6 is in operation in the ventilation mode.

[0046] The air conditioning unit for the granary also includes a remote control mechanism, which is arranged in the electric control box and communicates with a superior monitoring system.

[0047] The air-conditioning unit for granary has two modes: local control and remote control. When the local control mode is selected, some parameters can be set and viewed locally, while the remote control can only view the "relevant parameters" but cannot set them; when the remote control mode is selected, some parameters can be set and viewed remotely, while the local control can only view the "relevant parameters" but cannot set them.

[0048] The unit can communicate operating parameters, including operating signals, fault signals, etc., with the upper computer monitoring system through the communication protocol; the user can send operating commands to the hand operator (the display panel of the unit) through the upper system to centrally control the air-conditioning equipment.

[0049] A humidifier is also provided in the air processing chamber 2, and the humidifier is used to humidify the fresh air or return air with insufficient humidity to ensure the humidity requirement in the granary.

[0050] The air conditioning unit for granary is used in environments such as offshore platforms, ships or land grain warehouses where the environmental conditions are harsh and the unit size is required to be as small as possible.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An air conditioning unit for a granary, characterized in that: The invention comprises a frame (1), wherein an air processing chamber (2) at a lower layer and an air supply chamber (3), an air exhaust chamber (4) and a return air chamber (5) are formed inside the frame (1), wherein the air processing chamber (2) is provided with a fresh air outlet (21), the air supply chamber (3) is connected to the air processing chamber (2), the return air chamber (5) has a first state in which it is connected to the air exhaust chamber (4) and disconnected from the air processing chamber (2), and a second state in which it is connected to the air processing chamber (2) and disconnected from the air exhaust chamber (4), the air exhaust chamber (4) and the return air chamber (5) are connected to each other. The fresh air outlet (21) is connected to the outside air; the air supply chamber (3), the exhaust chamber (4) and the return air chamber (5) are arranged in sequence along the length direction of the frame (1), and the return air chamber (5) is located between the fresh air outlet (21) and the exhaust chamber (4); the air supply fan (22), the preheating coil (23), the cooling coil (24) and the heating coil (25) are arranged in sequence in the air treatment chamber (2) along the length direction of the frame (1), and the air inlet of the air supply fan (22) is switchedly connected to the return air chamber (5) and the fresh air outlet (21).

2. The air conditioning unit for granary according to claim 1, characterized in that: The return air chamber (5) is provided with a return air valve (51) and an exhaust air valve (52), and in the first state, the return air valve (51) is in a closed state and the exhaust air valve (52) is in an open state, and in the second state, the exhaust air valve (52) is in a closed state and the return air valve (51) is in an open state.

3. The air conditioning unit for granary according to claim 2, characterized in that: The granary air conditioning unit has a closed cycle mode and a ventilation mode: In the closed cycle mode, the return air valve (51) is opened, the exhaust air valve (52) and the fresh air inlet (21) are closed, and the gas in the granary flows back into the granary through the return air chamber (5), the air processing chamber (2) and the air supply chamber (3) in sequence; In the ventilation mode, the return air valve (51) is closed, the exhaust valve (52) and the fresh air inlet (21) are both opened, the gas in the granary passes through the return air chamber (5) and the exhaust air chamber (4) in sequence and then enters the outside, and the outside air passes through the fresh air inlet (21), the air processing chamber (2) and the air supply chamber (3) in sequence and then flows into the granary.

4. The air conditioning unit for granary according to claim 1, characterized in that: The cooling coil (24) is provided with a cold water valve, the heating coil (25) is provided with a hot water valve, and the air conditioning unit for the granary has a first preset temperature and a second preset temperature, the second preset temperature is greater than the first preset temperature, and when the temperature of the air flow passing through the blower (22) is lower than the first preset temperature, the hot water valve is fully opened and the cold water valve is fully closed, when the temperature of the air flow passing through the blower (22) is higher than the second preset temperature, the hot water valve is fully closed and the cold water valve is fully opened, and when the temperature of the air flow passing through the blower (22) is between the first preset temperature and the second preset temperature, the opening of the hot water valve and the opening of the cold water valve are dynamically adjusted.

5. The air conditioning unit for granary according to claim 4, characterized in that: When the temperature of the environment in which the granary air conditioning unit is located is lower than 0° C., the preheating coil (23) is preheated.

6. The air conditioning unit for granary according to claim 5, characterized in that: The granary air conditioning unit also includes a third preset temperature, which is greater than 0°C and less than the first preset temperature. When the temperature of the environment in which the granary air conditioning unit is located is higher than the third preset temperature, the preheating coil (23) stops preheating.

7. The air conditioning unit for granary according to claim 6, characterized in that: The temperature value of the first preset temperature is 8° C., the temperature value of the second preset temperature is 16° C., and the temperature value of the third preset temperature is 6° C.

8. The air conditioning unit for granary according to claim 4, characterized in that: The preheating coil (23), the cooling coil (24) and the heating coil (25) are all provided with inlet and outlet water pipes, all of the inlet and outlet water pipes are arranged inside the frame (1), and the ends of all of the inlet and outlet water pipes are exposed to the outside of the frame (1).

9. The air conditioning unit for granary according to claim 1, characterized in that: The air conditioning unit for the granary further comprises an electric control box, which is arranged between the air supply cavity (3) and the air exhaust cavity (4), and is fixedly arranged on the air supply cavity (3).

10. The air conditioning unit for granary according to claim 3, characterized in that: An exhaust fan (6) is arranged in the exhaust chamber (4), and the exhaust fan (6) is in an operating state in the ventilation mode.

11. The air conditioning unit for granary according to claim 9, characterized in that: The air conditioning unit for the granary also includes a remote control mechanism, which is arranged in the electric control box and communicates with a superior monitoring system.

12. The air conditioning unit for granary according to claim 1, characterized in that: A humidifier is also provided in the air processing chamber (2).

13. The granary air conditioning unit according to any one of claims 1 to 12, characterized in that: The air conditioning unit for a granary is applied to an offshore platform, a ship or a land grain storehouse.

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