Granary air conditioning unit with pressure relief function

Abstract

The utility model discloses a granary air conditioning unit with a pressure relief function. The granary air conditioning unit comprises an air conditioning host, the air conditioner main unit comprises a unit body, an evaporator, a condenser and a circulation module. An air duct area is formed at one end in the machine body, a heat exchange area is formed at the other end in the machine body, and a partition plate for separating the air duct area from the heat exchange area is arranged between the two ends; an air inlet chamber and an air supply chamber are formed in the air duct area, and the evaporator is arranged between the air inlet chamber and the air supply chamber; the condenser is arranged in the heat exchange area, and the condenser is communicated with the evaporator through the circulation module to form a circulation system capable of cooling; the circulation module comprises an upper circulation pipeline set communicating the output end of the evaporator with the input end of the condenser, a lower circulation pipeline set communicating the output end of the condenser with the input end of the evaporator, and a pressure relief pipeline connected to the upper circulation pipeline set in parallel. The pressure relief valve has a pressure relief function.

Description

Technical Field

[0001] This utility model relates to the technical field of grain warehouse air conditioning units, and in particular to a grain warehouse air conditioning unit with pressure relief function. Background Technology

[0002] As national grain production steadily increases, the number of state-owned grain depots and local reserve warehouses being built in China is gradually growing. Grain depots are characterized by their large footprint, specialized equipment, and high operating costs. Because grains have high initial moisture content, microorganisms multiply rapidly under suitable temperature conditions, causing the grains to heat up easily. If heat dissipation is inadequate, the grains are prone to aging, turning yellow, and eventually becoming moldy and spoiled.

[0003] Therefore, grain silos use air conditioning units to cool the grain and ensure its safe storage. Existing grain silo air conditioning units typically operate by compressing low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas using a compressor. This high-temperature, high-pressure gas then enters the condenser, where a condenser fan forces heat away from it. However, this process lacks a pressure relief function. When the condenser is very dirty or the outdoor temperature is very high, the operating pressure can become excessively high, causing the grain silo air conditioning unit to malfunction. Utility Model Content

[0004] The purpose of this utility model is to provide a grain warehouse air conditioning unit with pressure relief function.

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

[0006] A grain silo air conditioning unit with pressure relief function includes an air conditioning main unit; the air conditioning main unit includes a body, an evaporator, a condenser, and a circulation module; the body has an air duct area formed at one end, a heat exchange area formed 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 located between the air inlet chamber and the air outlet chamber; the condenser is located in the heat exchange area, and the condenser and the evaporator are connected through the circulation module to form a cooling circulation system;

[0007] 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 is equipped with 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 of the pressure relief pipe is connected between the high-pressure gauge and the condenser. The pressure relief pipe is equipped with a pressure relief component.

[0008] 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.

[0009] 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.

[0010] As a further technical solution of this utility model: the pressure relief component adopts a capillary tube and an unloading valve.

[0011] As a further technical solution of this utility model: the air conditioning unit includes a blower; the unit body has an air inlet communicating with the air inlet chamber and an air outlet communicating with the air outlet chamber at one end where the air duct area is located; the blower is installed in the air outlet chamber to blow air towards the air outlet, so that the airflow is input from the air inlet under the drive of the blower, passes through the evaporator, and is output to the air outlet.

[0012] 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.

[0013] As a further technical solution of this utility model: the body is provided with a breathable mesh plate on the outer side and rear of the end where the heat exchange zone is located, which allows 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.

[0014] As a further technical solution of this utility model: the condenser is L-shaped and is arranged along two breathable mesh plates to facilitate the use of a condensing fan to achieve forced heat exchange.

[0015] As a further technical solution of this utility model: the evaporator is inclined in the air duct area, so that the air inlet chamber gradually narrows from one end where the air inlet is located to the other end.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model proposes a grain warehouse air conditioning unit with pressure relief function. Through the cooperation between the body, evaporator, air blower, condenser and circulation module, it can realize the refrigeration cycle. And 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, it can relieve pressure, so that the high pressure will not continue to rise and reach the protection pressure of the high pressure controller, ensuring that the grain warehouse air conditioning unit can still operate normally. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the air conditioning unit for a grain warehouse with pressure relief function.

[0018] Figure 2 This is a first-person view schematic diagram of the air conditioning unit of a grain warehouse air conditioning unit with pressure relief function.

[0019] Figure 3 This is a second-view schematic diagram of the air conditioning unit of a grain warehouse air conditioning unit with pressure relief function.

[0020] Figure 4 This is a schematic diagram of the pressure relief principle of Example 1 of a grain warehouse air conditioning unit with pressure relief function.

[0021] Figure 5 This is a schematic diagram of the pressure relief principle of Example 2 for a grain warehouse air conditioning unit with pressure relief function.

[0022] Figure 6 This is a schematic diagram of the pressure relief principle of Example 3 for a grain warehouse air conditioning unit with pressure relief function. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-4An air conditioning unit for a grain silo with pressure relief function includes an air conditioning unit 10 installed outside the grain silo and a piping system connecting the air conditioning unit 10 to the inside of the grain silo. The air conditioning unit 10 includes a body 11, an evaporator 12, a blower 13, a condenser 14, and a circulation module 15. The body 11 has an air duct area 101 formed at one end and a heat exchange area 102 formed at the other end, with a partition 103 separating the air duct area 101 and the heat exchange area 102 between the two ends. The air duct area 101 has an air inlet chamber 111 and an air outlet chamber 112, with the evaporator 12 located between the air inlet chamber 111 and the air outlet chamber 112. The body 11 has an air inlet 104 communicating with the air inlet chamber 111 and an air outlet 105 communicating with the air outlet chamber 112 at the end where the air duct area 101 is located, and the air inlet 104 is equipped with a filter screen.

[0025] The air supply fan 13 is installed in the air supply chamber 112 to supply air towards the air outlet 105. Driven by the air supply fan 13, the airflow enters from the air inlet 104, passes through the evaporator 12, and is then output to the air outlet 105.

[0026] The condenser 14 is located in the heat exchange zone 102, and the condenser 14 is connected to the evaporator 12 through the circulation module 15 to form a circulation system capable of cooling.

[0027] The circulation module 15 includes an upper circulation pipe assembly 151 connecting the output end of the evaporator 12 to the input end of the condenser 14, a lower circulation pipe assembly 152 connecting the output end of the condenser 14 to the input end of the evaporator 12, and a pressure relief pipe 153 connected in parallel to the upper circulation pipe assembly 151. The upper circulation pipe assembly 151 is equipped with a gas-liquid separator 21 and a compressor 22. A low-pressure gauge 23 and a low-pressure controller 24 are provided on the pipe connecting the gas-liquid separator 21 and the evaporator 12. A high-pressure controller 25 and a high-pressure gauge 26 are provided on the pipe connecting the compressor 22 and the condenser 14. One end of the pressure relief pipe 153 is connected between the low-pressure controller 24 and the gas-liquid separator 21, and the other end of the pressure relief pipe 153 is connected between the high-pressure gauge 26 and the condenser 14. The pressure relief pipe 153 is equipped with a pressure relief component 30 to relieve pressure when the condenser 14 is very dirty or the outdoor temperature is very high.

[0028] Furthermore, the specific structure of the pressure relief component 30 can be flexibly designed according to actual needs, and has multiple embodiments;

[0029] Example 1

[0030] See Figure 4The pressure relief assembly 30 uses a capillary tube 31 and a solenoid valve 32. The upper circulation pipeline assembly 151 has a medium-pressure controller 301 between the high-pressure controller 25 and the high-pressure gauge 26 on the pipeline connecting the compressor 22 and the condenser 14. During normal operation, the high-pressure is lower than the disconnection pressure of the medium-pressure controller 301. When the condenser 14 is very dirty or the outdoor temperature is very high, the high-pressure is higher than the disconnection pressure of the medium-pressure controller 301. The medium-pressure controller 301 sends a disconnection signal to the control board of the grain silo air conditioning unit. The control board then controls the solenoid valve 32 to bypass some of the high-temperature, high-pressure refrigerant gas to the suction end of the compressor 22. Simultaneously, the control board sends a signal to clean the condenser 14. The capillary tube 31 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 25, allowing the grain silo air conditioning unit to operate normally.

[0031] Example 2

[0032] See Figure 5 The pressure relief assembly 30 adopts an electronic expansion valve 33; the upper circulation pipeline group 151 has a medium pressure controller 301 between the high pressure controller 25 and the high pressure gauge 26 on the pipeline connecting the compressor 22 and the condenser 14; its principle is the same as that of embodiment 1, the difference is that the refrigerant flow is controlled by an electronic expansion valve 33.

[0033] Example 3

[0034] See Figure 6 The pressure relief assembly 30 employs a capillary tube 31 and an unloading valve 34. During normal operation, the high-pressure is lower than the opening pressure of the unloading valve 34. When the condenser 14 is very dirty or the outdoor temperature is very high, the high-pressure during operation exceeds the opening pressure of the unloading valve 34, causing the unloading valve 34 to open and bypass some of the high-temperature, high-pressure refrigerant gas to the suction end of the compressor 22. The capillary tube 31 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 25, allowing the grain silo air conditioning unit to operate normally. Unlike embodiments 1 and 2, no signal is given to prompt for cleaning the condenser 14.

[0035] Furthermore, in this embodiment, the lower circulation pipeline assembly 152 is provided with a liquid reservoir 41, a dryer filter 42, a sight glass 43, and an expansion valve 44.

[0036] Furthermore, in this embodiment, the body 11 is provided with a breathable mesh plate 51 on the outer side and rear of the end where the heat exchange zone 102 is located, for communicating the heat exchange zone 102 with the outside, and a plurality of condensing fans 52 are provided in front of the end to drive the heat exchange zone 102 to dissipate heat to the outside.

[0037] Furthermore, in this embodiment, the evaporator 12 is inclined in the air duct area 101, so that the air inlet chamber 111 gradually narrows from one end where the air inlet 104 is located to the other end, so as to increase the contact area between the airflow input from the air inlet 104 and the evaporator 12.

[0038] Furthermore, in this embodiment, the condenser 14 is L-shaped and is arranged along the two breathable mesh plates 51 to facilitate forced heat exchange in conjunction with the condenser fan 52.

[0039] Furthermore, in this embodiment, the evaporator 12 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.

[0040] Furthermore, in this embodiment, the air supply fan 13 can be different depending on the requirements for fumigation prevention. Specifically, for those with low fumigation prevention requirements, a fully enclosed air supply fan with an IP54 rating or higher is used; for those with high fumigation prevention requirements, a gas explosion-proof or dust explosion-proof air supply fan is used.

[0041] Understandably, the method of using a grain silo air conditioning unit with pressure relief function according to this utility model is as follows: The compressor 22 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas. The high-temperature, high-pressure gas enters the condenser 14 and undergoes forced heat exchange through the condenser fan 52, carrying away the heat. The refrigerant enters the liquid receiver 41 and passes through the dryer filter 42 and the sight glass 43 in sequence, with the expansion valve 44 throttling the flow. The refrigerant becomes a low-temperature, low-pressure liquid and evaporates into a gas in the evaporator 12, absorbing the heat from the air passing through the evaporator 12 and cooling the air. After the low-temperature, low-pressure refrigerant passes through the gas-liquid separator 21, a small portion of the refrigerant liquid is separated, and the refrigerant gas enters the compressor 22 for compression, completing one cycle. When the condenser 14 is very dirty or the outdoor temperature is very high, the pressure relief pipe 153 on the above circulation pipe assembly 151 releases pressure, preventing the high pressure from continuing to rise and reaching the protection pressure of the high-pressure controller 25, allowing the grain silo air conditioning unit to continue operating normally.

[0042] In summary, the grain silo air conditioning unit with pressure relief function of this utility model can realize refrigeration cycle through the cooperation between the body 11, evaporator 12, air supply fan 13, condenser 14 and circulation module 15. The pressure relief pipe 153 is set on the upper circulation pipe group 151 of the circulation module 15. When the condenser 14 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 25, so that the grain silo air conditioning unit can still operate normally.

[0043] 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 grain silo air conditioning unit with pressure relief function, comprising an air conditioning unit (10); characterized in that: The air conditioning unit (10) includes a body (11), an evaporator (12), a condenser (14), and a circulation module (15). The body (11) has an air duct area (101) at one end and a heat exchange area (102) at the other end, and a partition (103) separating the air duct area (101) and the heat exchange area (102) between the two ends. The air duct area (101) has an air inlet chamber (111) and an air outlet chamber (112), and the evaporator (12) is located between the air inlet chamber (111) and the air outlet chamber (112). The condenser (14) is located in the heat exchange area (102), and the condenser (14) and the evaporator (12) are connected through the circulation module (15) to form a cooling circulation system. The circulation module (15) includes an upper circulation pipe assembly (151) connecting the output end of the evaporator (12) and the input end of the condenser (14), a lower circulation pipe assembly (152) connecting the output end of the condenser (14) and the input end of the evaporator (12), and a pressure relief pipe (153) connected in parallel to the upper circulation pipe assembly (151); the upper circulation pipe assembly (151) is provided with a gas-liquid separator (21) and a compressor (22), and the gas-liquid separator (21) connects the evaporator (12) and the compressor (14). The pipeline is equipped with a low-pressure gauge (23) and a low-pressure controller (24), and a high-pressure controller (25) and a high-pressure gauge (26) are provided on the pipeline connecting the compressor (22) and the condenser (14); one end of the pressure relief pipeline (153) is connected between the low-pressure controller (24) and the gas-liquid separator (21), and the other end of the pressure relief pipeline (153) is connected between the high-pressure gauge (26) and the condenser (14). The pressure relief pipeline (153) is equipped with a pressure relief component (30).

2. The grain silo air conditioning unit with pressure relief function according to claim 1, characterized in that: The pressure relief assembly (30) uses a capillary tube (31) and a solenoid valve (32). The upper circulation pipeline assembly (151) has a medium pressure controller (301) between the high pressure controller (25) and the high pressure gauge (26) on the pipeline connecting the compressor (22) and the condenser (14).

3. The grain silo air conditioning unit with pressure relief function according to claim 1, characterized in that: The pressure relief assembly (30) uses an electronic expansion valve (33), and the upper circulation pipeline assembly (151) has a medium pressure controller (301) between the high pressure controller (25) and the high pressure gauge (26) on the pipeline connecting the compressor (22) and the condenser (14).

4. The grain silo air conditioning unit with pressure relief function according to claim 1, characterized in that: The pressure relief assembly (30) employs a capillary tube (31) and an unloading valve (34).

5. The grain silo air conditioning unit with pressure relief function according to claim 1, characterized in that: The air conditioning unit (10) includes a blower (13); the unit body (11) has an air inlet (104) communicating with the air inlet chamber (111) and an air outlet (105) communicating with the air outlet chamber (112) at one end of the air duct area (101); the blower (13) is arranged to blow air towards the air outlet (105) in the air outlet chamber (112), so that under the drive of the blower (13), the airflow enters from the air inlet (104), passes through the evaporator (12) and is output to the air outlet (105).

6. The grain silo air conditioning unit with pressure relief function according to claim 1, characterized in that: The lower circulation pipeline assembly (152) contains a reservoir (41), a dryer filter (42), a sight glass (43), and an expansion valve (44).

7. The grain silo air conditioning unit with pressure relief function according to claim 1, characterized in that: The body (11) has a breathable mesh plate (51) on the outer side and rear of the end where the heat exchange zone (102) is located, which allows the heat exchange zone (102) to communicate with the outside. It also has a number of condensing fans (52) in front of the end to drive the heat exchange zone (102) to dissipate heat to the outside.

8. The grain silo air conditioning unit with pressure relief function according to claim 7, characterized in that: The condenser (14) is L-shaped and is arranged along two breathable mesh plates (51) to facilitate forced heat exchange in conjunction with the condenser fan (52).

9. The grain silo air conditioning unit with pressure relief function according to claim 1, characterized in that: The evaporator (12) is inclined in the air duct area (101), so that the air inlet chamber (111) gradually narrows from one end where the air inlet (104) is located to the other end.

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