Air conditioning unit for squat silo

Abstract

The utility model discloses an air conditioning unit for a squat silo, which is mounted at the top of the squat silo and comprises two air conditioning main units and two groups of pipeline systems. Two fixing frames are oppositely erected on the two sides of an outer ring of the top of the squat silo, each fixing frame is provided with an air conditioner host, and each pipeline system corresponds to the corresponding air conditioner host. An evaporator, a condenser and a circulating module are arranged in each air conditioner host; the circulating module comprises an upper circulating pipeline group communicated with the output end of the evaporator and the input end of the condenser, a lower circulating pipeline group communicated with the output end of the condenser and the input end of the evaporator, and a pressure relief pipeline connected to the upper circulating pipeline group in parallel; a gas-liquid separator and a compressor are arranged in the upper circulating pipeline group, a low-pressure pressure gauge and a low-pressure controller are arranged on a pipeline for communicating the gas-liquid separator and the evaporator, and a high-pressure controller and a high-pressure pressure gauge are arranged on a pipeline for communicating the compressor and the condenser. According to the utility model, the high pressure cannot continuously rise.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning unit technology, and in particular to a shallow circular air conditioning unit. Background Technology

[0002] As national grain production steadily increases, the number of state-owned grain depots and local reserve warehouses built in China is gradually increasing. Among them, shallow round silos, as a type of silo with large single-silo storage capacity, small unit storage area, reasonable structural stress, and high degree of mechanization, account for a large proportion of silo types in my country. Due to the high initial moisture content of grain, microorganisms will multiply rapidly under suitable temperature conditions, making the grain prone to heating. If heat dissipation is not efficient, the grain is prone to aging, turning yellow, and eventually becoming moldy and spoiled.

[0003] Therefore, in autumn and winter, shallow round silos use mechanical ventilation to cool the grain piles so that the grain can safely overwinter at a lower temperature. In spring and summer, shallow round silos use grain silo air conditioning units to cool the grain. These units use compressors to compress low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas. This high-temperature, high-pressure gas enters the condenser, where forced heat exchange by the condenser fan removes the heat, achieving safe grain storage. However, most existing grain silo air conditioning units are installed on the silo roof, making the condenser susceptible to external influences and dirt accumulation. When the condenser is very dirty or the outdoor temperature is high, the pressure inside the grain silo air conditioning unit can become excessively high, causing it to malfunction. Utility Model Content

[0004] The purpose of this utility model is to provide a shallow circular air conditioning unit.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An air conditioning unit for a shallow circular silo is installed on the top of the silo. It includes two air conditioning units and two sets of piping systems. Two fixed frames are installed opposite each other on the outer ring of the silo top. Each fixed frame is equipped with one of the air conditioning units. The air conditioning units have an air inlet and an air outlet. Each piping system is set up corresponding to one air conditioning unit, and the air inlet and air outlet of the air conditioning units are connected to the interior of the shallow circular silo on the same side of the inner ring of the silo top.

[0007] Each air conditioning unit contains an evaporator, a condenser, and a circulation module that connects the condenser and evaporator to form a cooling circulation system. The circulation module includes an upper circulation pipe group connecting the output end of the evaporator and the input end of the condenser, a lower circulation pipe group connecting the output end of the condenser and the input end of the evaporator, and a pressure relief pipe connected in parallel to the upper circulation pipe group. The upper circulation pipe group contains a gas-liquid separator and a compressor. A low-pressure gauge and a low-pressure controller are installed on the pipe connecting the gas-liquid separator and the evaporator. A high-pressure controller and a high-pressure gauge are installed on the pipe connecting the compressor and the condenser. One end of the pressure relief pipe is connected between the low-pressure controller and the gas-liquid separator, and the other end is connected between the high-pressure gauge and the condenser. The pressure relief pipe contains a pressure relief component.

[0008] As a further technical solution of this utility model: the pipeline system includes an air inlet pipe that connects the air inlet to the inside of the shallow circular compartment and an air outlet that connects the air outlet to the inside of the shallow circular compartment. Both the air inlet pipe and the air outlet are provided with an electric air valve at one end near the air conditioning unit and an insulated and airtight gate valve at one end near the shallow circular compartment.

[0009] As a further technical solution of this utility model: the pressure relief component adopts a capillary tube and a solenoid valve, and the upper circulation pipeline group has a medium pressure controller between the high pressure controller and the high pressure gauge on the pipeline connecting the compressor and the condenser.

[0010] As a further technical solution of this utility model: the pressure relief component adopts an electronic expansion valve, and the upper circulation pipeline group has a medium pressure controller between the high pressure controller and the high pressure gauge on the pipeline connecting the compressor and the condenser.

[0011] As a further technical solution of this utility model: the pressure relief component adopts a capillary tube and an unloading valve.

[0012] As a further technical solution of this utility model: the air conditioning unit has an air duct area at one end, a heat exchange area at the other end, and a partition separating the air duct area and the heat exchange area between the two ends; the air duct area has an air inlet chamber and an air outlet chamber, and the evaporator is provided between the air inlet chamber and the air outlet chamber.

[0013] As a further technical solution of this utility model: the back of the air conditioning unit faces the inner ring of the top of the compartment, the air inlet is located on the back of the air conditioning unit and is connected to the air inlet chamber; the air outlet is located on the side of the air duct area of ​​the air conditioning unit and is connected to the air supply chamber.

[0014] As a further technical solution of this utility model: the air supply chamber is equipped with an air supply fan, which supplies air towards the air outlet. Driven by the air supply fan, the airflow enters from the air inlet, penetrates the evaporator, and is then output to the air outlet.

[0015] As a further technical solution of this utility model: the condenser is arranged in the heat exchange zone; the outer side and rear of the heat exchange zone of the air conditioning unit are provided with a breathable mesh plate for the heat exchange zone to communicate with the outside, and a number of condensing fans are provided in front of the end to drive the heat exchange zone to dissipate heat to the outside.

[0016] As a further technical solution of this utility model: the lower circulation pipeline assembly is provided with a liquid reservoir, a drying filter, a sight glass and an expansion valve.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model proposes a shallow circular silo air conditioning unit that, through the cooperation of two air conditioning units and two sets of piping systems, draws the air that needs to be cooled into the air duct area of ​​the air conditioning unit from the top of the shallow circular silo through the air inlet pipe. After cooling, the air is then sent to the top of the shallow circular silo through the air outlet pipe to cool the space above the grain stacking line, thus realizing a cooling cycle. Furthermore, a pressure relief pipe is set on the upper circulation pipe group of the circulation module. When the condenser is very dirty or the outdoor temperature is very high, pressure relief can be carried out to prevent the high pressure from continuing to rise and reach the protection pressure of the high pressure controller, ensuring that the shallow circular silo air conditioning unit can operate normally. Attached Figure Description

[0018] Figure 1 This is a first-person view of the operating status of the Shallow Round Warehouse air conditioning unit.

[0019] Figure 2 This is a second-person view of the operating status of the Shallow Round Warehouse air conditioning unit.

[0020] Figure 3 This is a first-person view diagram of the air conditioning unit.

[0021] Figure 4 This is a second-view schematic diagram of the air conditioner unit.

[0022] Figure 5 This is a structural diagram of the air conditioning unit.

[0023] Figure 6 This is a schematic diagram of the pressure relief principle for Example 1 of the shallow circular air conditioning unit.

[0024] Figure 7 This is a schematic diagram of the pressure relief principle for Example 2 of the shallow circular air conditioning unit.

[0025] Figure 8 This is a schematic diagram of the pressure relief principle for Example 3 of the shallow circular air conditioning unit. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of protection of this utility model.

[0027] Please see Figures 1-4 An air conditioning unit for a shallow circular silo is installed on the top of the silo. It includes two air conditioning units 10 and two sets of piping systems 20. Two fixed frames 31 are installed opposite each other on the outer ring of the silo top. Each fixed frame 31 is equipped with one air conditioning unit 10. The air conditioning unit 10 has an air inlet 101 and an air outlet 102. Each piping system 20 is correspondingly set with one air conditioning unit 10. The air inlet 101 and the air outlet 102 of the air conditioning unit 10 are respectively connected to the interior of the shallow circular silo on the same side of the inner ring of the silo top.

[0028] See also Figures 6-8 Each air conditioning unit 10 contains an evaporator 11, a condenser 12, and a circulation module 13 that connects the condenser 12 and the evaporator 11 to form a cooling circulation system. The circulation module 13 includes an upper circulation pipe assembly 131 connecting the output end of the evaporator 11 to the input end of the condenser 12, a lower circulation pipe assembly 132 connecting the output end of the condenser 12 to the input end of the evaporator 11, and a pressure relief pipe 133 connected in parallel to the upper circulation pipe assembly 131. The upper circulation pipe assembly 131 contains... The gas-liquid separator 41 and compressor 42 are equipped with a low-pressure gauge 43 and a low-pressure controller 44 on the pipeline connecting the gas-liquid separator 41 and the evaporator 11, and a high-pressure controller 45 and a high-pressure gauge 46 on the pipeline connecting the compressor 42 and the condenser 12; one end of the pressure relief pipeline 133 is connected between the low-pressure controller 44 and the gas-liquid separator 41, and the other end of the pressure relief pipeline 133 is connected between the high-pressure gauge 46 and the condenser 12, and a pressure relief assembly 50 is provided inside the pressure relief pipeline 133;

[0029] Each piping system 20 includes an air inlet pipe 21 that connects the air inlet 101 to the interior of the shallow circular chamber and an air outlet 22 that connects the air outlet 102 to the interior of the shallow circular chamber. Both the air inlet pipe 21 and the air outlet 22 are provided with an electric air valve 201 at one end adjacent to the air conditioning unit 10 and an insulated and airtight gate valve 202 at one end adjacent to the shallow circular chamber. The electric air valve 201 is interlocked with the air conditioning unit 10 for opening and closing, and the insulated and airtight gate valve 202 is used to tightly shut off the system during fumigation operations.

[0030] Furthermore, the specific structure of the pressure relief component 50 can be flexibly designed according to actual needs, and has multiple embodiments;

[0031] Example 1

[0032] See Figure 6The pressure relief assembly 50 uses a capillary tube 51 and a solenoid valve 52. The upper circulation pipeline assembly 131 has a medium-pressure controller 53 between the high-pressure controller 45 and the high-pressure gauge 46 on the pipeline connecting the compressor 42 and the condenser 12. During normal operation, the high-pressure is lower than the disconnection pressure of the medium-pressure controller 53. When the condenser 12 is very dirty or the outdoor temperature is very high, the high-pressure is higher than the disconnection pressure of the medium-pressure controller 53. The medium-pressure controller 53 sends a disconnection signal to the control board of the grain silo air conditioning unit. The control board then controls the solenoid valve 52 to bypass some of the high-temperature, high-pressure refrigerant gas to the suction end of the compressor 42. Simultaneously, the control board sends a signal to clean the condenser 12. The capillary tube 51 controls the refrigerant flow rate. After some of the high-temperature, high-pressure refrigerant gas is bypassed and depressurized, the high-pressure will not continue to rise, reaching the protection pressure of the high-pressure controller 45, allowing the grain silo air conditioning unit to operate normally.

[0033] Example 2

[0034] See Figure 7 The pressure relief assembly 50 adopts an electronic expansion valve 54; the upper circulation pipeline group 131 has a medium pressure controller 53 between the high pressure controller 45 and the high pressure gauge 46 on the pipeline connecting the compressor 42 and the condenser 12; its principle is the same as that of the embodiment, the difference is that the refrigerant flow is controlled by an electronic expansion valve 54.

[0035] Example 3

[0036] See Figure 8 The pressure relief assembly 50 employs a capillary tube 51 and an unloading valve 55. During normal operation, the high-pressure is lower than the opening pressure of the unloading valve 55. When the condenser 12 is very dirty or the outdoor temperature is very high, the high-pressure during operation exceeds the opening pressure of the unloading valve 55, causing the unloading valve 55 to open and bypass some of the high-temperature, high-pressure refrigerant gas to the suction end of the compressor 42. The capillary tube 51 controls the refrigerant flow rate. After the high-temperature, high-pressure refrigerant gas is bypassed and depressurized, the high-pressure will not continue to rise, reaching the protection pressure of the high-pressure controller 45, allowing the grain silo air conditioning unit to operate normally. Unlike the previous embodiment, no signal is given to prompt for cleaning the condenser 12.

[0037] Furthermore, in conjunction with reference Figure 5 In this embodiment, the air conditioning unit 10 has an air duct area 61 formed at one end, a heat exchange area 62 formed at the other end, and a partition 63 separating the air duct area 61 and the heat exchange area 62 between the two ends; the air duct area 61 has an air inlet chamber 611 and an air outlet chamber 612 formed therein, and the evaporator 11 is provided between the air inlet chamber 611 and the air outlet chamber 612.

[0038] Furthermore, in this embodiment, the back of the air conditioning unit 10 faces the inner ring of the top of the compartment, the air inlet 101 is disposed on the back of the air conditioning unit 10 and communicates with the air inlet chamber 611; the air outlet 102 is disposed on the side of the air duct area 61 of the air conditioning unit 10 and communicates with the air outlet chamber 612.

[0039] Furthermore, in this embodiment, the air supply chamber 612 is provided with an air supply fan 601, which supplies air to the air outlet 102. Driven by the air supply fan 601, the airflow enters from the air inlet 101, passes through the evaporator 11, and is then output to the air outlet 102.

[0040] Furthermore, in this embodiment, the condenser 12 is disposed in the heat exchange zone 62; the outer side and rear of the heat exchange zone 62 of the air conditioning unit 10 are provided with a breathable mesh plate 621 for communicating with the outside of the heat exchange zone 62, and a plurality of condensing fans 622 are provided in front of the end to drive the heat exchange zone 62 to dissipate heat to the outside.

[0041] Furthermore, in this embodiment, the lower circulation pipeline assembly 132 is provided with a liquid reservoir 71, a dryer filter 72, a sight glass 73, and an expansion valve 74.

[0042] Furthermore, in this embodiment, the evaporator 11 is an aluminum tube evaporator, a copper tube evaporator with anti-corrosion coating surface treatment, or an evaporator made of non-copper / aluminum tubes, such as stainless steel tubes.

[0043] Furthermore, in this embodiment, different types of fans can be used depending on the requirements for fumigation prevention. Specifically, for those with low fumigation prevention requirements, a fully enclosed fan with an IP54 rating or higher is used; for those with high fumigation prevention requirements, a gas explosion-proof or dust explosion-proof fan is used.

[0044] Understandably, the method of using a shallow circular silo air conditioning unit according to this utility model is as follows: The compressor 42 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas. The high-temperature, high-pressure gas enters the condenser 12 and undergoes forced heat exchange through the condenser fan 622, which carries away the heat. The refrigerant enters the liquid receiver 71 and passes through the dryer filter 72 and the sight glass 73 in sequence, with the expansion valve throttling the flow. The refrigerant becomes a low-temperature, low-pressure liquid and evaporates into a gas in the evaporator 11, absorbing the heat from the air passing through the evaporator 11 and cooling the air. After the low-temperature, low-pressure refrigerant passes through the gas-liquid separator 41, a small portion of the refrigerant liquid is separated, and the refrigerant gas enters the compressor 42 for compression, completing one cycle. When the condenser 12 is very dirty or the outdoor temperature is very high, the pressure relief pipe 133 on the above circulation pipe assembly 131 releases the pressure, preventing the high pressure from continuing to rise and reaching the protection pressure of the high-pressure controller 45, allowing the silo air conditioning unit to continue operating normally.

[0045] In summary, this utility model provides a shallow circular silo air conditioning unit that, through the cooperation of two air conditioning units 10 and two sets of piping systems 20, draws the air requiring cooling from the top of the shallow circular silo through the air inlet pipe 21 into the air duct area 61 of the air conditioning unit 10. After cooling, the air is then sent to the top of the shallow circular silo through the air outlet pipe 22 to cool the space above the grain stacking line, thus achieving a cooling cycle. Furthermore, a pressure relief pipe 133 is installed on the upper circulation pipe group 131 of the circulation module 13. When the condenser 12 is very dirty or the outdoor temperature is very high, pressure relief can be performed to prevent the high pressure from continuing to rise and reach the protection pressure of the high pressure controller 45, ensuring that the shallow circular silo air conditioning unit can operate normally.

[0046] Any combination of different embodiments of this utility model, provided it does not violate the inventive concept of this utility model, shall be considered as the disclosure of this utility model; any simple modifications to the technical solution and any combination of different embodiments within the scope of the inventive concept of this utility model, without violating the inventive concept of this utility model, shall be within the protection scope of this utility model.

Claims

1. A shallow circular silo air conditioning unit, installed on the roof of a shallow circular silo, characterized in that: It includes two air conditioning units (10) and two sets of piping systems (20); the shallow circular silo has two fixed frames (31) erected opposite each other on the outer ring of the silo top, and each fixed frame (31) is equipped with an air conditioning unit (10). The air conditioning unit (10) has an air inlet (101) and an air outlet (102). Each piping system (20) is set up corresponding to an air conditioning unit (10), and the air inlet (101) and air outlet (102) of the air conditioning unit (10) are connected to the interior of the shallow circular silo on the same side of the inner ring of the silo top. Each air conditioning unit (10) is provided with an evaporator (11), a condenser (12), and a circulation module (13) that connects the condenser (12) and the evaporator (11) to form a cooling circulation system. The circulation module (13) includes an upper circulation pipe assembly (131) connecting the output end of the evaporator (11) and the input end of the condenser (12), a lower circulation pipe assembly (132) connecting the output end of the condenser (12) and the input end of the evaporator (11), and a pressure relief pipe (133) connected in parallel to the upper circulation pipe assembly (131). The upper circulation pipe assembly (131) is provided with a gas-liquid separator. The gas-liquid separator (41) and compressor (42) are equipped with a low-pressure gauge (43) and a low-pressure controller (44) on the pipe connecting the gas-liquid separator (41) and the evaporator (11), and a high-pressure controller (45) and a high-pressure gauge (46) are equipped on the pipe connecting the compressor (42) and the condenser (12); one end of the pressure relief pipe (133) is connected between the low-pressure controller (44) and the gas-liquid separator (41), and the other end of the pressure relief pipe (133) is connected between the high-pressure gauge (46) and the condenser (12), and a pressure relief component (50) is provided in the pressure relief pipe (133).

2. The shallow circular silo air conditioning unit according to claim 1, characterized in that: The piping system (20) includes an air inlet pipe (21) that connects the air inlet (101) to the inside of the shallow circular compartment and an air outlet (22) that connects the air outlet (102) to the inside of the shallow circular compartment. Both the air inlet pipe (21) and the air outlet pipe (22) are provided with an electric air valve (201) at one end near the air conditioning unit (10) and an insulated and airtight gate valve (202) at one end near the shallow circular compartment.

3. The shallow circular silo air conditioning unit according to claim 1, characterized in that: The pressure relief assembly (50) uses a capillary tube (51) and a solenoid valve (52). The upper circulation pipeline assembly (131) has a medium pressure controller (53) between the high pressure controller (45) and the high pressure gauge (46) on the pipeline connecting the compressor (42) and the condenser (12).

4. The shallow circular silo air conditioning unit according to claim 1, characterized in that: The pressure relief assembly (50) uses an electronic expansion valve (54), and the upper circulation pipeline assembly (131) has a medium pressure controller (53) between the high pressure controller (45) and the high pressure gauge (46) on the pipeline connecting the compressor (42) and the condenser (12).

5. The shallow circular silo air conditioning unit according to claim 1, characterized in that: The pressure relief assembly (50) employs a capillary tube (51) and an unloading valve (55).

6. The shallow circular silo air conditioning unit according to claim 1, characterized in that: The air conditioning unit (10) has an air duct area (61) formed at one end and a heat exchange area (62) formed at the other end, and a partition (63) separating the air duct area (61) and the heat exchange area (62) between the two ends; the air duct area (61) has an air inlet chamber (611) and an air outlet chamber (612) formed therein, and the evaporator (11) is provided between the air inlet chamber (611) and the air outlet chamber (612).

7. The shallow circular silo air conditioning unit according to claim 6, characterized in that: The back of the air conditioning unit (10) faces the inner ring of the top of the compartment. The air inlet (101) is located on the back of the air conditioning unit (10) and is connected to the air inlet chamber (611). The air outlet (102) is located on the side of the air duct area (61) of the air conditioning unit (10) and is connected to the air outlet chamber (612).

8. The shallow circular silo air conditioning unit according to claim 7, characterized in that: The air supply chamber (612) is equipped with an air supply fan (601) which supplies air to the air outlet (102). Driven by the air supply fan (601), the airflow enters from the air inlet (101), passes through the evaporator (11), and is then output to the air outlet (102).

9. The shallow circular silo air conditioning unit according to claim 7, characterized in that: The condenser (12) is located in the heat exchange zone (62); the outer side and rear of the heat exchange zone (62) of the air conditioning unit (10) are provided with a breathable mesh plate (621) for the heat exchange zone (62) to communicate with the outside, and a number of condensing fans (622) are provided in front of the end to drive the heat exchange zone (62) to dissipate heat to the outside.

10. The shallow circular silo air conditioning unit according to claim 1, characterized in that: The lower circulation pipeline assembly (132) contains a liquid reservoir (71), a dryer filter (72), a sight glass (73), and an expansion valve (74).

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