CN111999009A - Full-covering automatic detection system for refrigeration house refrigerant leakage - Google Patents

Abstract

The invention belongs to the technical field of refrigerant leakage detection, and in particular relates to a full-coverage automatic detection system for refrigerant leakage in a cold storage, comprising a PLC central processing unit, a static pressure box, a main air duct of a storage body and a main air duct of a pipeline; Both the pipe and the main air pipe of the pipeline are connected with the air inlet of the static pressure box. The main air pipe of the storage body is provided with branch air pipes of the storage body leading to the interior of each storage body, and each of the branch air pipes of the storage body is installed on the There is an air valve, and the main air duct of the silo is provided with a silo pipeline fan between the static pressure box and the branch duct of the silo; There is an opening at the point, and the main air duct of the pipeline is provided with a main air duct fan between the static pressure box and the opening of the main air duct of the pipeline; the air outlet of the static pressure box is provided with a halogen leak detector, and the air Valves, storehouse pipeline fans, main air duct fans and halogen leak detectors are all controlled and connected with the PLC central processing unit. The system automatically detects whether the refrigerant leaks in real time, which improves the detection efficiency.

Description

A full-coverage automatic detection system for refrigerant leakage in cold storage

technical field

The invention belongs to the technical field of refrigerant leakage detection, and in particular relates to a full-coverage automatic detection system for refrigerant leakage in a cold storage.

Background technique

At present, in the refrigeration system of cold storage, due to the large number of storage bodies and the long pipelines, especially after the pipelines are installed, they are insulated, so it is difficult to detect the leakage point. The unit of ton, especially environmentally friendly refrigerants, is relatively expensive. After leakage, it will not only affect the refrigeration in the warehouse, but also cause certain damage to the environment and cause great losses to the economy. After a system with a large amount of injection leaks, it is difficult to find the leakage point from the refrigeration effect and pressure if the leak point is not found in time. It is too late to find out from the refrigeration effect or pressure, and most of the refrigerant has leaked at this time. If the leak detector is used to inspect the warehouses one by one every day, the workload in each warehouse is very large, and it is impossible to check the pipelines that have been insulated. Therefore, the current automatic detection of full coverage of refrigerant leakage in the cold storage system is a big gap.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a full-coverage automatic detection system for refrigerant leakage in a cold storage, which automatically detects whether the refrigerant leaks in real time, thereby improving the detection efficiency.

The invention is realized through the following technical solutions: a full coverage automatic detection system for refrigerant leakage in a cold storage, comprising a PLC central processing unit, a static pressure box, a main air duct of a warehouse body and a main air duct of a pipeline; The main air pipes of the pipeline are connected with the air inlet of the static pressure box, and the main air pipes of the storage body are provided with branch air pipes of the storage body leading to the interior of each storage body. Valve, the main air duct of the silo body is provided with a silo body pipeline fan between the static pressure box and the branch air duct of the silo body; There is a hole, and the main air pipe of the pipeline is provided with a main air duct fan between the static pressure box and the hole of the main air pipe of the pipeline; the air outlet of the static pressure box is provided with a halogen leak detector, the air valve, The pipeline fan of the warehouse body, the main air duct fan and the halogen leak detector are all connected to the PLC central processing unit for control, and the PLC central processing unit is also connected to the display signal.

Preferably, the main air pipe of the pipeline is provided with a waterproof bend at one end away from the static pressure box.

Preferably, the air valve, the storage pipeline fan, the main air duct fan, the halogen leak detector and the display are connected to the PLC central processing unit through electric wires and communication lines.

The beneficial effects of the invention are as follows: the full-coverage automatic detection system for refrigerant leakage in the cold storage of the present application can be widely used in various cold storages, filling the blank of the automatic monitoring of the refrigerant leakage of the cold storage, especially the large-scale cold storage, and the investment and transformation cost of the present application is low. , high degree of automation, accurate monitoring, saving a lot of manpower and material resources, preventing the occurrence of a large amount of refrigerant leakage in cold storage, especially large-scale cold storage, but not being able to detect this situation in time, filling the gap of automatic detection of full coverage of refrigerant leakage in cold storage, avoiding refrigeration due to refrigeration. The damage to the environment caused by the leakage of the agent and the huge loss caused by the leakage of refrigeration.

Description of drawings

Fig. 1 is the structural representation of the present invention;

In the figure, 1. PLC central processing unit, 2. Halogen leak detector, 3. Static pressure box, 4. Storage pipeline fan, 5. Communication signal, 6. Air valve, 7. Storage branch air duct, 8 , The main air duct of the library body, 9, the waterproof bend, 10, the main air duct of the pipeline, 11, the display, 12, the main air duct fan.

Detailed ways

The present invention will be further described below according to the accompanying drawings and embodiments.

As shown in Figure 1, a full-coverage automatic detection system for refrigerant leakage in a cold storage includes a PLC central processing unit 1, a halogen leak detector 2, a static pressure box 3, a storage pipeline fan 4, an air valve 6, and a storage branch The air duct 7, the main air duct 8 of the storage body, the main air duct 10 of the pipeline, the display 11 and the main air duct fan 12; , the main air duct 8 of the warehouse body is connected with the branch air ducts 7 of the warehouse body that branch to the air sampling in each cold room, and each of the branch air ducts of the warehouse body 7 is equipped with an independently controllable air valve 6. The air duct 8 is provided with a storage body pipeline fan 4 between the static pressure box 3 and the storage body branch air duct 7; There is a hole at the place, so that the gas at the welding point can be sucked in, and the main air duct 10 of the pipeline is provided with a main air duct fan 12 between the static pressure box 3 and the hole of the pipeline main air duct 10; The air outlet is provided with a halogen leak detector 2, and the PLC central processing unit 1 is connected with the halogen leak detector 2, the air valve 6, the storage body pipeline fan 4, the pipeline main air duct 10, and the display 11 through the communication signal 5. , the communication signal 5 is specifically realized by the electric wire and the communication wire.

As an improvement of this embodiment, the main air duct 10 of the pipeline is provided with a waterproof bend 9 at one end away from the static pressure box 3, as shown in FIG. 1, that is, a section of U is provided on the main air duct 10 of the pipeline U-shaped bending, the opening of the U-shaped bending is downward, and the waterproof bend 9 is used to prevent rainwater or sundries from entering the main air pipe 10 of the pipeline.

The working principle of this system is as follows:

The refrigerant leakage is judged by automatically collecting the gas at the measured point, and the gas is collected through the pipes distributed at each collection point. For example, when detecting the refrigerant leakage in the warehouse, first start the pipeline fan 4 of the warehouse, and then open the air valve 6 on the branch air duct 7 of the measured warehouse at the same time, and the air in the warehouse passes through the branch air duct of the warehouse body. 7. Send it into the static pressure box 3. At this time, the halogen leak detector 2 located at the air outlet of the static pressure box 3 performs refrigerant leakage detection on the outlet air of the tested warehouse. If the refrigerant content is detected, an alarm signal will be sent. to the display 11 terminal;

Similarly, if you want to detect whether there is refrigerant leakage in the system pipeline, you can turn on the main air duct fan 12 on the main air duct 10 of the pipeline through the PLC central processing unit 1, and the wind will suck air from the waterproof bend 9 of the main air duct 10 of the pipeline. , If there is refrigerant leakage at the welding point of the pipeline, it will be sent to the static pressure box 3 together with the inhaled air. At this time, the halogen leak detector 2 located at the air outlet of the static pressure box 3 will detect the refrigerant leakage in the outlet air, such as When the refrigerant content is detected, the alarm signal is sent to the terminal of the display 11;

In this application, an acousto-optic alarm can also be connected to the display 11, and a remote control module can also be connected to the PLC central processing unit 1, and the alarm information can be directly displayed on the manager's mobile phone, so as to better remind the manager to find out in time; The PLC central processing unit 1 is a programmable controller, which can set the opening time, opening cycle and opening sequence of the storage pipeline fan 4, the pipeline main air duct 10 and each air valve 6, so as to detect the inside of each cold storage in time. and pipeline refrigerant leakage.

To sum up, the automatic detection system for full coverage of refrigerant leakage in cold storage can be widely used in various cold storage systems, filling the gap of full coverage automatic detection technology for refrigerant leakage in cold storage, especially large-scale cold storage, and solves the problem of refrigerant leakage in cold storage. The problems of difficult detection, large amount of detection, and incomplete detection prevent the occurrence of huge losses and damage to the environment caused by failure to detect refrigerant leakage in the cold storage in time, which is of great importance in terms of energy conservation, environmental protection and economic value. significance.

Claims (3)

1. The utility model provides a freezer refrigerant leaks full coverage automatic check out system which characterized in that: the device comprises a PLC central processing unit (1), a static pressure box (3), a main warehouse body air pipe (8) and a main pipeline air pipe (10); the storehouse body main air pipe (8) and the pipeline main air pipe (10) are both connected with an air inlet of the static pressure box (3), a storehouse body branch air pipe (7) leading to the interior of each storehouse body is arranged on the storehouse body main air pipe (8), an air valve (6) is mounted on each storehouse body branch air pipe (7), and a storehouse body pipeline fan (4) is arranged between the static pressure box (3) and the storehouse body branch air pipes (7) of the storehouse body main air pipe (8); the pipeline main air pipe (10) is laid close to a system pipeline, a hole is formed in the pipeline welding point of the pipeline main air pipe (10), and a main air pipe fan (12) is arranged between the static pressure box (3) and the hole of the pipeline main air pipe (10); the air outlet of static pressure case (3) is equipped with halogen leak detector (2), blast gate (6), storehouse body pipeline fan (4), main tuber pipe fan (12) and halogen leak detector (2) all with PLC central processing unit (1) control connection, PLC central processing unit (1) still with display (11) signal connection.

2. The refrigeration house refrigerant leakage full-coverage automatic detection system according to claim 1, characterized in that: and a waterproof bend (9) is arranged at one end of the pipeline main air pipe (10) far away from the static pressure box (3).

3. The refrigeration house refrigerant leakage full-coverage automatic detection system according to claim 1, characterized in that: the air valve (6), the reservoir body pipeline fan (4), the main air pipe fan (12), the halogen leak detector (2) and the display (11) are connected with the PLC central processing unit (1) through electric wires and communication wires.

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