阅读说明：本技术 一种冷库节能的方法 (Energy-saving method for refrigeration house ) 是由 黄毅龙 黄涛 张明欣 苑小彬 苑卫彬 于 2020-06-29 设计创作，主要内容包括：本发明提供一种冷库节能的方法,属于冷库领域,该冷库节能的方法具体步骤为冷库围护结构设计与施工,冷库库温选择与调节,冷风幕及塑料门设置,冷库库内照明布置,冷库库内货物堆放和冷库检修维护。本发明采用不锈钢分隔架进行置放货物,并且按照种类进行堆放,采用货物不同类不置放原则,可减少货物堆积,提高货物之间的透气性,进而减少制冷需求,进而避免电源浪费,节约电能,同时采用PLC控制屏可进行智能控制,提高制冷效果,保证冷藏效率,采用机械式控制和自动控制的方式,保证操控更加便捷、稳定,提高操控便捷性。(The invention provides a method for saving energy of a refrigeration house, belonging to the field of refrigeration houses. The invention adopts the stainless steel separation frame to place the goods, stacks the goods according to types, adopts the principle that the goods are not placed according to different types, can reduce the goods accumulation, improves the air permeability between the goods, further reduces the refrigeration requirement, further avoids the power waste, saves the electric energy, can carry out intelligent control by adopting the PLC control screen, improves the refrigeration effect, ensures the refrigeration efficiency, adopts the mechanical control and automatic control modes, ensures that the control is more convenient and stable, and improves the control convenience.)

1. The energy-saving method for the refrigeration house is characterized by comprising the following steps:

the method comprises the following steps: the method comprises the following steps of designing and constructing a cold storage enclosure structure, constructing the cold storage at a shady position, paving the periphery of the inner wall of the cold storage through heat insulation plates, gluing and waterproofing construction through a waterproof resin adhesive layer, forming a circular vent hole with the diameter of 20-25 cm at the top end inside the cold storage, mounting a circular stainless steel filter screen inside the circular vent hole through a screw, performing glue injection and sealing on a mounting gap through the waterproof resin adhesive layer, finally mounting a circular aluminum alloy cover plate on the upper part of the circular vent hole through a hinge, mounting refrigeration equipment at one side of the cold storage, mounting a PLC (programmable logic controller) control screen at the other side of the cold storage, and arranging a plurality of temperature sensors inside the cold storage to finish construction and construction work;

step two: selecting and adjusting the temperature of the refrigerator;

step three: a cold air curtain and a plastic door are arranged;

step four: lighting arrangement in the cold storage;

step five: stacking the goods in the cold storage warehouse, namely placing the goods by adopting a stainless steel separation frame, stacking according to types, wherein gaps exist among the goods, and name labels of the goods are adhered to the front parts of the stainless steel separation frame, so that the goods can be discharged at one time when being discharged, and can be directly fed at one time when being fed, and the goods cannot be stacked in disorder;

step six: the method comprises the following steps of (1) overhauling and maintaining a refrigeration house, wherein the refrigeration equipment is periodically maintained, overhauled and maintained, wherein the normal maintenance cycle of the refrigeration equipment is more than 10000h, and overhaul is required; operating for more than 50000h, and performing intermediate repair; minor repair is needed when the operation is carried out for more than 1000 h; and the refrigeration equipment has mechanical wear and valve plate leakage in the operation process, and needs to be replaced and maintained in time.

2. The energy-saving method for the cold storage according to claim 1, wherein in the second step, the selection and adjustment of the temperature of the cold storage comprise the following steps:

the first step is as follows: seasonal refrigerator temperature is selected, summer refrigerator refrigeration temperature is selected according to the quantity of goods in the refrigerator, if the goods in the refrigerator account for less than one half of the volume of the refrigerator, the refrigerator temperature is set to be 0-3 ℃, if the goods in the refrigerator account for more than one half of the volume of the refrigerator, the refrigerator temperature is set to be-3-0 ℃, winter refrigerator refrigeration temperature is selected according to the quantity of the goods in the refrigerator, if the goods in the refrigerator account for less than one half of the volume of the refrigerator, the refrigerator temperature is set to be 0-2 ℃, and if the goods in the refrigerator account for more than one half of the volume of the refrigerator, the refrigerator temperature is set to be-2-0 ℃;

the second step is that: the cold storage temperature adjusting setting can be divided into four storage temperature stages, namely, 0 ℃, 2 ℃, 3 ℃ and-2 ℃ according to the instruction setting of an operator on a PLC control screen;

the third step: the automatic selection and adjustment of the temperature of the refrigerator are realized, the temperature of the refrigerator is detected through a temperature sensor, the automatic regulation and control selection is realized according to the temperature stage of the refrigerator, and the refrigeration action of the refrigeration equipment is controlled through a PLC control screen.

3. The energy-saving method for the refrigeration house according to claim 1, wherein in the third step, the cold air curtain and the plastic door are arranged, and the concrete operation comprises the following steps:

the first step is as follows: the plastic door is arranged, the plastic door is arranged in the door of the cold storage warehouse, the electric push rod is arranged at the upper part of the plastic door, so that the electric push rod controls the plastic door to open and close, when the cold storage warehouse door is opened, the electric push rod delays for 3-5S to push the plastic door to open, after an operator enters, the plastic door is automatically delayed for 3-5S and then closed, the cold storage warehouse door does not need to be closed, and the installation test is finished;

the second step is that: the cold air curtain is installed at the rear part of the plastic door and positioned at the top of a refrigeration house, the cold air curtain is controlled by a winding motor, the falling and winding actions of the cold air curtain can be controlled by the winding motor, when an operator carries goods, the refrigeration house door is opened, the plastic door is opened, the cold air curtain automatically falls, when the goods are delivered out of the refrigeration house, the refrigeration house door is still opened, the plastic door is still opened, the cold air curtain is automatically wound, and when the operator leaves, the cold air curtain automatically falls without uninterrupted opening and closing the refrigeration house door and the plastic door;

the third step: cold wind curtain and plastics door installation control set up infrared sensor and ultrasonic sensor in the inside import department of freezer, control electric putter and coiling motor through PLC control panel and move, through the corresponding instruction of operating personnel to PLC control panel input, judge whether open and close or open and shut cold wind curtain and plastics door.

4. The method for saving energy in a cold storage according to claim 1, wherein in step four, the specific operation of the lighting arrangement in the cold storage comprises the following steps:

the first step is as follows: the method comprises the steps of setting illumination in a cold storage warehouse, preparing an illumination lamp tube with a lamp holder, sequentially installing the illumination lamp tube with the lamp holder on the top of the cold storage warehouse from front to back through screws, arranging a photosensitive sensor on the top of the cold storage warehouse, determining the installation area according to the volume of the cold storage warehouse, and finally sleeving a transparent heat-insulating cover on the illumination lamp tube with the lamp holder;

the second step is that: lighting control, when the cold storage door and the plastic door are opened simultaneously, and the cold air curtain is in a retracted state, the lighting lamp tube is turned on, when the cold air curtain falls down, and the cold storage door and the plastic door are in an opened state simultaneously, the lighting lamp tube is still turned on, when the cold air curtain is retracted, and any one of the cold storage door and the plastic door is closed, the lighting lamp tube is turned off;

the third step: and the illumination control is set by adopting mechanical control and automatic control, and the illumination is selectively controlled by the control modes of the mechanical control and the automatic control.

5. The method for saving energy of the refrigeration house according to claim 1, wherein in the step one, the heat insulation board is one or a combination of polyurethane foam board, polystyrene foam board and extruded sheet.

6. The method for saving energy of the refrigeration house according to claim 1, characterized in that in the step one, the refrigeration equipment adopts one or a combination of a semi-closed, a totally closed and a scroll type refrigeration compressor.

7. The method for saving energy of the refrigeration storage according to claim 3, wherein in step three, the corresponding command in the third step can be set as a command for transporting goods and a command for transporting goods out of the refrigeration storage, and the PLC control screen is used for virtual key control.

8. The energy-saving method for the refrigeration storage according to claim 4, wherein in the fourth step, the transparent heat-insulating cover in the first step is a rubber cover with a built-in transparent foam plastic layer.

9. The method for saving energy in a cold storage according to claim 4, wherein in step four, the mechanical control in the third step is a mechanical switch control, that is, the switch is pressed to light the lighting lamp, and the switch is pressed to extinguish the lighting lamp; when the photosensitive sensor detects an external light source, the PLC control screen controls the lighting lamp tube to be lightened, and when the light source is lost, the PLC control screen controls the lighting lamp tube to be extinguished, and corresponding action instruction programs of the second step are input into the PLC control screen for control.

10. The method for saving energy in a cold storage according to claim 4, wherein in the fourth step, the installation area in the first step is set to be 1.8-5.8W per square meter.

Technical Field

The invention belongs to the technical field of a refrigeration house, and particularly relates to an energy-saving method for the refrigeration house.

Background

China is a big agricultural country, the fruit and vegetable yield is second to the second big agricultural industry of grains, and the annual yield of fruits and vegetables is the first of all in all countries in the world. However, compared with developed countries such as Europe and America, the technology for preserving picked fruits and vegetables in China is seriously lagged, a complete and independent cold chain of picked fruits and vegetables is not formed, and the storage and transportation quantity of the fruits and vegetables are greatly unbalanced with the yield of the fruits and vegetables.

A cold storage, which is one type of refrigeration equipment. The cold storage is a constant temperature and humidity storage device which creates an environment with different outdoor temperature or humidity by manual means and is used for food, liquid, chemical engineering, medicine, vaccines, scientific experiments and other articles. The cold store is usually located near the port of transportation or the place of origin. Compared with the refrigerator, the refrigeration house has larger refrigeration area and a common refrigeration principle.

The food cold storage is a building for freezing and refrigerating food, and the interior of the cold storage is kept at a certain low temperature by an artificial refrigeration method. In order to reduce the introduction of external heat, the terrace, the wall and the roof of the refrigeration house are laid with a moisture-proof air-isolating layer and a heat-insulating layer with certain thickness, and in the engineering management of the food refrigeration house, scientific management is carried out according to the characteristics of the food refrigeration house so as to ensure safe production, prolong the service life, reduce the production cost, save the maintenance cost and improve the economic benefit of enterprises.

In general, in the refrigeration storage engineering, a refrigerating machine is used for refrigerating, liquid with low gasification temperature is used as a coolant, and the refrigerating machine mainly comprises a compressor, a condenser, an evaporation tube and the like.

However, the conventional method for storing the refrigerator has the problems that the self-control effect is poor when the articles are stored in the refrigerator, the refrigerating effect is poor, and the goods accumulation affects the refrigerating effect.

Therefore, the invention of a method for saving energy of a refrigeration house is very necessary.

Disclosure of Invention

In order to solve the technical problems, the invention provides a method for saving energy of a refrigeration house, which aims to solve the problems that the existing method for storing the refrigeration house has poor automatic control effect when the refrigeration house stores materials, poor refrigeration effect and the goods accumulation influence the refrigeration effect, and the method for saving energy of the refrigeration house specifically comprises the following steps:

the method comprises the following steps: the method comprises the following steps of designing and constructing a cold storage enclosure structure, constructing the cold storage at a shady position, paving the periphery of the inner wall of the cold storage through heat insulation plates, gluing and waterproofing construction through a waterproof resin adhesive layer, forming a circular vent hole with the diameter of 20-25 cm at the top end inside the cold storage, mounting a circular stainless steel filter screen inside the circular vent hole through a screw, performing glue injection and sealing on a mounting gap through the waterproof resin adhesive layer, finally mounting a circular aluminum alloy cover plate on the upper part of the circular vent hole through a hinge, mounting refrigeration equipment at one side of the cold storage, mounting a PLC (programmable logic controller) control screen at the other side of the cold storage, and arranging a plurality of temperature sensors inside the cold storage to finish construction and construction work;

step two: the method comprises the following steps of selecting and adjusting the temperature of the refrigerator, and specifically comprises the following steps:

the first step is as follows: seasonal refrigerator temperature is selected, summer refrigerator refrigeration temperature is selected according to the quantity of goods in the refrigerator, if the goods in the refrigerator account for less than one half of the volume of the refrigerator, the refrigerator temperature is set to be 0-3 ℃, if the goods in the refrigerator account for more than one half of the volume of the refrigerator, the refrigerator temperature is set to be-3-0 ℃, winter refrigerator refrigeration temperature is selected according to the quantity of the goods in the refrigerator, if the goods in the refrigerator account for less than one half of the volume of the refrigerator, the refrigerator temperature is set to be 0-2 ℃, and if the goods in the refrigerator account for more than one half of the volume of the refrigerator, the refrigerator temperature is set to be-2-0 ℃;

the second step is that: the cold storage temperature adjusting setting can be divided into four storage temperature stages, namely, 0 ℃, 2 ℃, 3 ℃ and-2 ℃ according to the instruction setting of an operator on a PLC control screen;

the third step: the temperature of the refrigerator is automatically selected and adjusted, the temperature of the refrigerator is detected through a temperature sensor, the selection is automatically adjusted and controlled according to the temperature stage of the refrigerator, and the refrigeration action of the refrigeration equipment is controlled through a PLC (programmable logic controller) control screen;

step three: the cold wind curtain and the plastic door are arranged, and the concrete operation comprises the following steps:

the first step is as follows: the plastic door is arranged, the plastic door is arranged in the door of the cold storage warehouse, the electric push rod is arranged at the upper part of the plastic door, so that the electric push rod controls the plastic door to open and close, when the cold storage warehouse door is opened, the electric push rod delays for 3-5S to push the plastic door to open, after an operator enters, the plastic door is automatically delayed for 3-5S and then closed, the cold storage warehouse door does not need to be closed, and the installation test is finished;

the second step is that: the cold air curtain is installed at the rear part of the plastic door and positioned at the top of a refrigeration house, the cold air curtain is controlled by a winding motor, the falling and winding actions of the cold air curtain can be controlled by the winding motor, when an operator carries goods, the refrigeration house door is opened, the plastic door is opened, the cold air curtain automatically falls, when the goods are delivered out of the refrigeration house, the refrigeration house door is still opened, the plastic door is still opened, the cold air curtain is automatically wound, and when the operator leaves, the cold air curtain automatically falls without uninterrupted opening and closing the refrigeration house door and the plastic door;

the third step: the cold air curtain and the plastic door are installed and controlled, an infrared sensor and an ultrasonic sensor are arranged at an inlet inside the refrigeration house, an electric push rod and a winding motor are controlled to act through a PLC control screen, and an operator inputs a corresponding instruction to the PLC control screen to judge whether the cold air curtain and the plastic door are opened or closed;

step four: the lighting arrangement in the cold storage comprises the following steps:

the first step is as follows: the method comprises the steps of setting illumination in a cold storage warehouse, preparing an illumination lamp tube with a lamp holder, sequentially installing the illumination lamp tube with the lamp holder on the top of the cold storage warehouse from front to back through screws, arranging a photosensitive sensor on the top of the cold storage warehouse, determining the installation area according to the volume of the cold storage warehouse, and finally sleeving a transparent heat-insulating cover on the illumination lamp tube with the lamp holder;

the second step is that: lighting control, when the cold storage door and the plastic door are opened simultaneously, and the cold air curtain is in a retracted state, the lighting lamp tube is turned on, when the cold air curtain falls down, and the cold storage door and the plastic door are in an opened state simultaneously, the lighting lamp tube is still turned on, when the cold air curtain is retracted, and any one of the cold storage door and the plastic door is closed, the lighting lamp tube is turned off;

the third step: the lighting control setting adopts mechanical control and automatic control, and selectively controls lighting work through the control modes of the mechanical control and the automatic control;

step five: stacking the goods in the cold storage warehouse, namely placing the goods by adopting a stainless steel separation frame, stacking according to types, wherein gaps exist among the goods, and name labels of the goods are adhered to the front parts of the stainless steel separation frame, so that the goods can be discharged at one time when being discharged, and can be directly fed at one time when being fed, and the goods cannot be stacked in disorder;

step six: the method comprises the following steps of (1) overhauling and maintaining a refrigeration house, wherein the refrigeration equipment is periodically maintained, overhauled and maintained, wherein the normal maintenance cycle of the refrigeration equipment is more than 10000h, and overhaul is required; operating for more than 50000h, and performing intermediate repair; minor repair is needed when the operation is carried out for more than 1000 h; and the refrigeration equipment has mechanical wear and valve plate leakage in the operation process, and needs to be replaced and maintained in time.

Preferably, in the first step, the heat insulation board is one or a combination of a polyurethane foam board, a polystyrene foam board and an extruded board.

Preferably, in the step one, the refrigeration equipment adopts one or a combination of a semi-closed refrigeration compressor, a totally closed refrigeration compressor and a scroll refrigeration compressor.

Preferably, in the third step, the corresponding instruction in the third step can be set as a cargo carrying instruction and a cargo delivery instruction, and the virtual key of the PLC control screen is used for controlling.

Preferably, in the fourth step, the installation area in the first step is set to be 1.8 to 5.8W per square meter.

Preferably, in the fourth step, the transparent heat preservation cover in the first step is a rubber cover with a built-in transparent foam plastic layer.

Preferably, in the fourth step, the mechanical control in the third step is mechanical switch control, that is, the switch is pressed to turn on the lighting lamp, and the switch is pressed to turn off the lighting lamp; when the photosensitive sensor detects an external light source, the PLC control screen controls the lighting lamp tube to be lightened, and when the light source is lost, the PLC control screen controls the lighting lamp tube to be extinguished, and corresponding action instruction programs of the second step are input into the PLC control screen for control.

Preferably, in step five, the cargo gap is set to be 5-8 cm.

The equipment market in the scheme of the invention is sold, is not limited to typical manufacturers, and can be used for realizing the invention as long as the technical index can meet the requirement.

Compared with the prior art, the invention has the following beneficial effects: the method for saving energy of the refrigeration house is widely applied to the technical field of refrigeration houses. The invention adopts the stainless steel separation frame to place the goods, stacks the goods according to types, adopts the principle that the goods are not placed according to different types, can reduce the goods accumulation, improves the air permeability between the goods, further reduces the refrigeration requirement, further avoids the power waste, saves the electric energy, can carry out intelligent control by adopting the PLC control screen, improves the refrigeration effect, ensures the refrigeration efficiency, adopts the mechanical control and automatic control modes, ensures that the control is more convenient and stable, and improves the control convenience.

Drawings

FIG. 1 is a flow chart of a method for energy conservation in a cold storage.

Fig. 2 is a flow chart of the cold store temperature selection and adjustment.

Fig. 3 is a flow chart of the arrangement of the cold air curtain and the plastic door.

Fig. 4 is a flow chart of the lighting arrangement within the cold storage.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

in the figure:

as shown in figure 1

The energy-saving method for the refrigeration house specifically comprises the following steps:

s101: the method comprises the following steps of designing and constructing a cold storage enclosure structure, constructing the cold storage at a shady position, paving the periphery of the inner wall of the cold storage through heat insulation plates, gluing and waterproofing construction through a waterproof resin adhesive layer, forming a circular vent hole with the diameter of 20-25 cm at the top end inside the cold storage, mounting a circular stainless steel filter screen inside the circular vent hole through a screw, performing glue injection and sealing on a mounting gap through the waterproof resin adhesive layer, finally mounting a circular aluminum alloy cover plate on the upper part of the circular vent hole through a hinge, mounting refrigeration equipment at one side of the cold storage, mounting a PLC (programmable logic controller) control screen at the other side of the cold storage, and arranging a plurality of temperature sensors inside the cold storage to finish construction and construction work;

s102: the selection and adjustment of the temperature of the refrigerator are shown in the attached figure 2, and the specific operation comprises the following steps:

s201: seasonal refrigerator temperature is selected, summer refrigerator refrigeration temperature is selected according to the quantity of goods in the refrigerator, if the goods in the refrigerator account for less than one half of the volume of the refrigerator, the refrigerator temperature is set to be 0-3 ℃, if the goods in the refrigerator account for more than one half of the volume of the refrigerator, the refrigerator temperature is set to be-3-0 ℃, winter refrigerator refrigeration temperature is selected according to the quantity of the goods in the refrigerator, if the goods in the refrigerator account for less than one half of the volume of the refrigerator, the refrigerator temperature is set to be 0-2 ℃, and if the goods in the refrigerator account for more than one half of the volume of the refrigerator, the refrigerator temperature is set to be-2-0 ℃;

s202: the cold storage temperature adjusting setting can be divided into four storage temperature stages, namely, 0 ℃, 2 ℃, 3 ℃ and-2 ℃ according to the instruction setting of an operator on a PLC control screen;

s203: the temperature of the refrigerator is automatically selected and adjusted, the temperature of the refrigerator is detected through a temperature sensor, the selection is automatically adjusted and controlled according to the temperature stage of the refrigerator, and the refrigeration action of the refrigeration equipment is controlled through a PLC (programmable logic controller) control screen;

s103: cold wind curtain and plastics door setting, it is shown with reference to fig. 3 that the concrete operation includes the following steps:

s301: the plastic door is arranged, the plastic door is arranged in the door of the cold storage warehouse, the electric push rod is arranged at the upper part of the plastic door, so that the electric push rod controls the plastic door to open and close, when the cold storage warehouse door is opened, the electric push rod delays for 3-5S to push the plastic door to open, after an operator enters, the plastic door is automatically delayed for 3-5S and then closed, the cold storage warehouse door does not need to be closed, and the installation test is finished;

s302: the cold air curtain is installed at the rear part of the plastic door and positioned at the top of a refrigeration house, the cold air curtain is controlled by a winding motor, the falling and winding actions of the cold air curtain can be controlled by the winding motor, when an operator carries goods, the refrigeration house door is opened, the plastic door is opened, the cold air curtain automatically falls, when the goods are delivered out of the refrigeration house, the refrigeration house door is still opened, the plastic door is still opened, the cold air curtain is automatically wound, and when the operator leaves, the cold air curtain automatically falls without uninterrupted opening and closing the refrigeration house door and the plastic door;

s303: the cold air curtain and the plastic door are installed and controlled, an infrared sensor and an ultrasonic sensor are arranged at an inlet inside the refrigeration house, an electric push rod and a winding motor are controlled to act through a PLC control screen, and an operator inputs a corresponding instruction to the PLC control screen to judge whether the cold air curtain and the plastic door are opened or closed;

s104: the lighting arrangement in the cold storage, as shown in fig. 4, specifically operates by the following steps:

s401: the method comprises the steps of setting illumination in a cold storage warehouse, preparing an illumination lamp tube with a lamp holder, sequentially installing the illumination lamp tube with the lamp holder on the top of the cold storage warehouse from front to back through screws, arranging a photosensitive sensor on the top of the cold storage warehouse, determining the installation area according to the volume of the cold storage warehouse, and finally sleeving a transparent heat-insulating cover on the illumination lamp tube with the lamp holder;

s402: lighting control, when the cold storage door and the plastic door are opened simultaneously, and the cold air curtain is in a retracted state, the lighting lamp tube is turned on, when the cold air curtain falls down, and the cold storage door and the plastic door are in an opened state simultaneously, the lighting lamp tube is still turned on, when the cold air curtain is retracted, and any one of the cold storage door and the plastic door is closed, the lighting lamp tube is turned off;

s403: the lighting control setting adopts mechanical control and automatic control, and selectively controls lighting work through the control modes of the mechanical control and the automatic control;

s105: stacking the goods in the cold storage warehouse, namely placing the goods by adopting a stainless steel separation frame, stacking according to types, wherein gaps exist among the goods, and name labels of the goods are adhered to the front parts of the stainless steel separation frame, so that the goods can be discharged at one time when being discharged, and can be directly fed at one time when being fed, and the goods cannot be stacked in disorder;

s106: the method comprises the following steps of (1) overhauling and maintaining a refrigeration house, wherein the refrigeration equipment is periodically maintained, overhauled and maintained, wherein the normal maintenance cycle of the refrigeration equipment is more than 10000h, and overhaul is required; operating for more than 50000h, and performing intermediate repair; minor repair is needed when the operation is carried out for more than 1000 h; and the refrigeration equipment has mechanical wear and valve plate leakage in the operation process, and needs to be replaced and maintained in time.

Preferably, in S101, the heat insulation board is one or a combination of a polyurethane foam board, a polystyrene foam board and an extruded board.

Preferably, in S101, the refrigeration equipment adopts one or a combination of a semi-closed, a fully-closed and a scroll refrigeration compressor.

Preferably, in S103, the corresponding command in S303 may be a command for transporting goods and a command for delivering goods from a warehouse, and the command may be controlled by virtual keys on a PLC control screen.

Preferably, in S104, the installation area in S401 is set to 1.8 to 5.8W/square meter.

Preferably, in S104, the transparent heat preservation cover in S401 is a rubber cover with a built-in transparent foam layer.

Preferably, in S104, the mechanical control in S403 is a mechanical switch control, that is, the switch is pressed to turn on the lighting lamp, and the switch is pressed to turn off the lighting lamp; when the photosensitive sensor detects an external light source, the PLC control screen controls the lighting lamp tube to be lightened, and when the light source is lost, the PLC control screen controls the lighting lamp tube to be extinguished, and corresponding action instruction programs of the second step are input into the PLC control screen for control.

Preferably, in S105, the cargo gap is set to 5-8 cm.