CN108759253B - Refrigeration house air curtain system capable of forming positive pressure space - Google Patents

Refrigeration house air curtain system capable of forming positive pressure space Download PDF

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Publication number
CN108759253B
CN108759253B CN201810912918.1A CN201810912918A CN108759253B CN 108759253 B CN108759253 B CN 108759253B CN 201810912918 A CN201810912918 A CN 201810912918A CN 108759253 B CN108759253 B CN 108759253B
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warehouse
air
cold storage
external
static pressure
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CN108759253A (en
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朱宗升
刘兴华
王美钧
赵凡
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Tianjin University of Commerce
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Tianjin University of Commerce
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D13/00—Stationary devices, e.g. cold-rooms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • F24F2009/005—Use of air currents for screening, e.g. air curtains combined with a door

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The invention discloses a cold storage air curtain system capable of forming a positive pressure space, which is arranged on two sides of a cold storage door for goods to enter and exit in a cold storage; the inside and outside sides of the top of the cold storage door are respectively provided with an external static pressure box and an internal static pressure box; the top of the warehouse outer static pressure box is communicated with the air outlets at the bottoms of the warehouse outer fans; the top of the in-warehouse static pressure box is communicated with the air outlets at the bottoms of the in-warehouse fans; a plurality of warehouse external air delivery channels with downward openings are arranged at the bottom opening of the warehouse external static pressure box; the bottom opening of the in-warehouse static pressure box is provided with a plurality of in-warehouse air supply ducts with downward openings and in-warehouse positive pressure air supply outlets; and an in-warehouse return air duct and an out-warehouse return air duct for returning air are respectively arranged inside and outside the cold storage door and used for returning air. The invention has good heat insulation effect, can form a closed positive pressure space inside and outside the refrigeration house by utilizing the air curtain, effectively prevents air outside the refrigeration house from diffusing and entering the refrigeration house, maintains the temperature inside the refrigeration house stable, and ensures the quality of goods stored in the refrigeration house.

Description

Refrigeration house air curtain system capable of forming positive pressure space
Technical Field
The invention relates to the technical field of energy conservation and emission reduction, in particular to a refrigeration house air curtain system capable of forming a positive pressure space.
Background
At present, with the improvement of the demand of cold chains, the storage capacity of the refrigeration house in China is continuously increased, so that the energy consumption is increased year by year, but at present, due to the fact that the management levels of the refrigeration house are different, the attention degrees of different enterprises to the energy consumption of the refrigeration house are different, the relative energy consumption of the refrigeration house in China is far higher than the advanced level in the foreign country, and therefore, how to reduce the energy consumption of the refrigeration house becomes very important.
For a traditional refrigeration house system, an air cooler is utilized to exchange heat with air in the refrigeration house, so that the aim of preparing a low-temperature environment is fulfilled. Traditional freezer system is when the door of a storehouse is opened, because the convection current heat transfer that the difference in temperature formed inside and outside the door of a storehouse, can arouse the temperature fluctuation in the freezer, thereby influence the quality that the goods were stored to the freezer, make the operational load of whole freezer system increase simultaneously, in addition, contain a large amount of vapor in the outer air of freezer, can follow and get into in the freezer, and can condense at the air-cooler side, make the frosting of air-cooler serious, the whole operating efficiency of freezer system has further been reduced.
Therefore, there is an urgent need to develop a refrigerator system which has a good heat insulation effect, can effectively prevent air outside the refrigerator from diffusing into the refrigerator, and can maintain the temperature in the refrigerator stable, thereby ensuring the quality of goods stored in the refrigerator.
Disclosure of Invention
In view of the above, the present invention provides an air curtain system for a refrigeration storage capable of forming a positive pressure space, which has a good heat insulation effect, can effectively prevent air outside the refrigeration storage from diffusing into the refrigeration storage, and maintain a stable temperature inside the refrigeration storage, thereby ensuring the quality of goods stored in the refrigeration storage, being beneficial to wide application, and having great significance in production practice.
Therefore, the invention provides a refrigeration house air curtain system capable of forming a positive pressure space, which comprises a hollow refrigeration house, wherein a refrigeration house door for goods to enter and exit is arranged in the refrigeration house;
the inside and outside sides of the top of the cold storage door are respectively provided with an external static pressure box and an internal static pressure box;
the top of the warehouse outer static pressure box is communicated with the air outlets at the bottoms of the warehouse outer fans;
the top of the in-warehouse static pressure box is communicated with the air outlets at the bottoms of the in-warehouse fans;
a plurality of warehouse external air delivery channels with downward openings are arranged at the bottom opening of the warehouse external static pressure box;
and a plurality of in-warehouse air supply ducts with downward openings are arranged at the bottom openings of the in-warehouse static pressure boxes.
A plurality of warehouse external air return inlets with upward openings are formed in the ground on the outer side of the bottom of the cold warehouse door;
and a plurality of in-warehouse air return ports with upward openings are arranged on the ground at the inner side of the bottom of the cold storage door.
The warehouse external air return inlet is arranged right correspondingly to the warehouse external air delivery duct, and the shape and the size of the warehouse external air return inlet are correspondingly matched with those of the warehouse external air delivery duct;
the air return opening in the warehouse is arranged right correspondingly to the air supply duct in the warehouse, and the shape and the size of the air return opening in the warehouse are correspondingly matched with those of the air supply duct in the warehouse.
The ground outside the bottom of the cold storage door is provided with two hollow external air return ducts which are transversely distributed, and the two external air return ducts are arranged in bilateral symmetry;
the two external air return channels are opened at one ends close to each other and communicated with the external air return inlets, and the other ends far away from the two external air return channels are opened upwards and far away from the cold storage door.
The ground on the inner side of the bottom of the cold storage door is provided with two hollow in-storage return air ducts which are transversely distributed, and the two in-storage return air ducts are arranged in a bilateral symmetry manner;
one ends of the two in-warehouse return air ducts close to each other are opened and communicated with the in-warehouse return air inlet, and the other ends of the two in-warehouse return air ducts far away from each other are opened upwards and far away from the position of the cold storage door.
The left side, the right side and the inner side edge of the bottom of the in-warehouse static pressure box are provided with in-warehouse air supply ducts;
and the left side, the right side and the outer side edge of the bottom of the external plenum box are provided with external air delivery channels.
Wherein, the center of the bottom of the static pressure box in the warehouse is also provided with a plurality of internal positive pressure air supply outlets which are transversely distributed.
The transverse widths of the external static pressure box and the internal static pressure box are respectively equal to the transverse width of the cold storage door, and the internal static pressure box are arranged in an internal and external symmetrical mode.
The cold storage door sensing unit is mounted on one side of the cold storage door and used for detecting and identifying the working state of the cold storage door, namely, identifying whether the cold storage door is in an opening state or a closing state, when the cold storage door is detected to be in the opening state, an opening control signal is sent to the indoor fan and the outdoor fan, the indoor fan and the outdoor fan are triggered to be started, and when the cold storage door is detected to be in the closing state, a closing control signal is sent to the indoor fan and the outdoor fan, and the indoor fan and the outdoor fan are stopped to operate.
The cold storage door sensing unit is a limit switch, a proximity switch or an infrared sensor.
Compared with the prior art, the air curtain system for the refrigeration house, which is provided by the invention, has the advantages that the heat insulation effect is good, the air curtain can be used for forming the closed positive pressure space inside and outside the refrigeration house, the air outside the refrigeration house is effectively prevented from diffusing into the refrigeration house, the temperature inside the refrigeration house is maintained to be stable, the quality of goods stored in the refrigeration house is ensured, the air curtain system is beneficial to wide application, and the air curtain system has great production practice significance.
In addition, the invention can also reduce the heat and humidity exchange of the air inside and outside the refrigerator at the beginning of the refrigerator door, slow down the frosting rate of the air cooler and better maintain the temperature in the refrigerator to be stable.
Drawings
Fig. 1 is a schematic perspective structural view of a freezer air curtain system capable of forming a positive pressure space according to the present invention;
fig. 2 is an enlarged schematic view of the related structure of the closed air curtain space for forming positive pressure in the air curtain system of the refrigerator capable of forming positive pressure space provided by the invention;
in the figure, 1 is an in-warehouse fan, 2 is an out-warehouse fan, 3 is an in-warehouse static pressure box, 4 is an out-warehouse static pressure box, 5 is an in-warehouse return air duct, 6 is an out-warehouse return air duct, 7 is an in-warehouse return air inlet, 8 is an out-warehouse return air inlet, 9 is an air curtain inner curtain wall, 10 is an air curtain outer curtain wall, 11 is an in-warehouse air supply duct, 12 is an out-warehouse air supply duct, 13 is an in-warehouse positive pressure air supply outlet, 14 is a warehouse door state sensing unit, 15 is a cold-warehouse door, 16 is an enclosure structure, and 20 is the ground.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1 and 2, the invention provides a cold storage air curtain system capable of forming a positive pressure space, which comprises a hollow cold storage, wherein a cold storage door 15 for goods entering and exiting is arranged in the cold storage;
the inside and outside sides of the top of the cold storage door 15 are respectively provided with an external cold pressure box 4 and an internal cold pressure box 3;
the top of the warehouse outer static pressure box 4 is communicated with the bottom air outlets of a plurality of warehouse outer fans 2 (not limited to two shown in figure 1);
the top of the internal static pressure box 3 is communicated with the bottom air outlets of a plurality of internal fans 1 (not limited to two shown in figure 1);
a plurality of warehouse external air delivery ducts 12 with downward openings are arranged at the bottom opening of the warehouse external static pressure box 4;
the bottom opening of the in-warehouse static pressure box 3 is provided with a plurality of in-warehouse air supply ducts 11 with downward openings.
In the invention, in a concrete implementation manner, a plurality of warehouse external air return ports 8 with upward openings are arranged on the ground 20 at the outer side of the bottom of the cold warehouse door 15;
a plurality of in-warehouse air return ports 7 with upward openings are arranged on the ground 20 on the inner side of the bottom of the cold storage door 15.
In particular implementation, the warehouse external air return opening 8 is arranged opposite to the warehouse external air supply duct 12, and the shape and the size of the warehouse external air return opening 8 are correspondingly matched with those of the warehouse external air supply duct 12;
the air return opening 7 in the warehouse is opposite to the air supply duct 11 in the warehouse, and the shape and the size of the air return opening 7 in the warehouse are correspondingly matched with those of the air supply duct 11 in the warehouse.
In particular, the left side, the right side and the inner side edge of the bottom of the in-warehouse static pressure box 3 are provided with in-warehouse air supply ducts 11;
the left side, the right side and the outer side edge of the bottom of the external plenum box 4 are provided with external air delivery ducts 12;
the center of the bottom of the in-house static pressure box 3 is also provided with a plurality of in-house positive pressure air supply outlets 13 (not limited to six shown in fig. 1) which are transversely distributed, and the plurality of in-house positive pressure air supply outlets 13 can be distributed in two rows or multiple rows.
Specifically, two hollow external air return ducts 6 which are transversely distributed are arranged on the ground 20 on the outer side of the bottom of the cold storage door 15, and the two external air return ducts 6 are arranged in bilateral symmetry;
the two external air return ducts 6 are open at one ends close to each other and communicated with the external air return opening 8, and the other ends far away from the two external air return ducts 6 are open upwards and far away from the cold storage door 15.
Specifically, two hollow in-warehouse return air ducts 5 which are transversely distributed are arranged on the ground 20 on the inner side of the bottom of the cold storage door 15, and the two in-warehouse return air ducts 5 are arranged in a bilateral symmetry manner;
one ends of the two in-warehouse return air ducts 5 close to each other are opened and communicated with the in-warehouse return air inlet 7, and the other ends of the two in-warehouse return air ducts 5 far away from each other are opened upwards and far away from the position of the cold storage door 15.
In the invention, not only the air curtain system of the refrigerator of the invention can be started by manually starting the air blower 1 in the refrigerator and the air blower 2 outside the refrigerator through a common button switch, a breaker and the like by a user, but also the air curtain system of the refrigerator of the invention can be automatically started and closed through specific structural improvement, for this reason, in the specific implementation, a door frame on one side (not limited to the left side shown in figure 1, and also can be the right side according to the opening direction of the door of the refrigerator) of the door 15 of the refrigerator is provided with a door sensing unit 14 for detecting and identifying the working state of the door 15 of the refrigerator, namely whether the door is opened or closed, when the door of the refrigerator is detected to be in the opened state, an opening control signal is sent to the air blower 1 inside the refrigerator and the air blower 2 outside the refrigerator to trigger the start of the air blower 1 inside the refrigerator and the air blower 2 outside the refrigerator, and when the door is detected, and sending a closing control signal to the in-warehouse fan 1 and the out-warehouse fan 2, and stopping operating the in-warehouse fan 1 and the out-warehouse fan 2.
In a specific implementation, the cold storage door sensing unit 14 may be an existing limit switch, a proximity switch, or an infrared sensor.
In the present invention, in a specific implementation, the cold storage door 15 may be a sliding door.
In concrete implementation, the top and the bottom of the cold storage door 15 are respectively positioned in a horizontally placed guide rail, so that the cold storage door can be conveniently transversely moved left and right.
In the invention, in a concrete implementation, the transverse widths of the external static pressure box 4 and the internal static pressure box 3 are respectively equal to the transverse width of the cold storage door 15, and the external static pressure box 4 and the internal static pressure box 3 are arranged inside and outside symmetrically by taking the cold storage door 15 as a center.
In the invention, in a concrete implementation, the side surface of the refrigeration house provided with the refrigeration house door 15 is provided with an enclosure structure 16, and the external static pressure box 4 and the internal static pressure box 3 are fixedly connected with the enclosure structure 16.
In the invention, it should be noted that the internal fan 1 and the external fan 2 are respectively positioned inside and outside the door 15 of the cold storage, the air inlet of the internal fan 1 is connected with the space inside the cold storage, the air inlet of the external fan 2 is communicated with the space outside the cold storage, the internal fan 1 and the external fan 2 can respectively send the cold air inside and outside the cold storage into the internal static pressure box 3 and the external static pressure box 4, and the air pressure inside the internal static pressure box 3 and the external static pressure box 4 is ensured to be higher than the air pressure of the external environment.
The inner static pressure box 3 is connected with an air outlet of the inner fan 1, the inner fan 1 stores pressurized air in the inner static pressure box 3, and the inner fan 1 is used for ensuring that an inner air supply duct 11 and an inner positive pressure air supply outlet 13 form pressure required by an air curtain inner curtain wall 9.
The warehouse outer static pressure box 4 is connected with an air outlet of the warehouse outer fan 2, the warehouse outer fan 2 stores the pressurized air in the warehouse outer static pressure box 4, and the warehouse outer fan 2 is used for ensuring the pressure required by the warehouse outer air supply duct 12 to form the air curtain outer curtain wall 10.
The in-house air supply duct 11 is used for outputting pressurized air in the in-house static pressure box 3 (specifically, forming vertically downward pressurized airflow), and forming an in-house curtain wall 9 (namely, an invisible door curtain formed by airflow).
The warehouse external air delivery duct 12 is used for outputting pressurized air in the warehouse external static pressure box 4 (specifically forming vertically downward pressurized airflow), and forming a warehouse external curtain wall 10 (namely an invisible door curtain formed by airflow).
In the invention, it should be further noted that the in-warehouse air return opening 7 is positioned on the ground at the inner side of the warehouse door 15, the shape of the in-warehouse air return opening corresponds to that of the in-warehouse air supply duct 11, and the surface of the in-warehouse air return opening is provided with a grid which is used for conveying the air output from the in-warehouse air supply duct 11 back to the in-warehouse air return duct 5, so that the severe disturbance of the ground air caused by the air emitted to the ground is avoided, and the heat insulation effect inside and outside; meanwhile, the external air return opening 8 is located on the ground outside the door 15, corresponds to the external air supply duct 12 in shape, and has a grid on the surface for conveying the air output from the external air supply duct 12 back to the external air return duct 6, so that severe disturbance of the ground air caused by the air jet to the ground is avoided, and the heat insulation effect inside and outside the refrigerator is ensured.
In addition, the air return duct 5 in the warehouse is positioned below the ground at the inner side of the warehouse door 15, and air curtain air enters the air return duct 5 in the warehouse through the air return opening 7 in the warehouse and returns to the positions, far away from the warehouse door 15, on the two sides in the warehouse door 15 through the air return duct 5 in the warehouse; the external air return duct 6 is positioned below the ground outside the warehouse door 15, and air curtain air enters the external air return duct 6 through the external air return opening 8 and returns to the position far away from the warehouse door on the two sides outside the warehouse door 15 through the external air return duct 6.
In the present invention, the shape of the curtain wall 9 is determined by the in-house air delivery duct 11; the shape of the air curtain outer curtain wall 10 is determined by an air delivery duct 12 outside the warehouse; the air curtain inner curtain wall 9 and the air curtain outer curtain wall 10 form a rectangular air curtain space together, so that the inner side and the outer side of the cold storage door 15 are completely surrounded;
in the invention, the cold storage is internally provided with an air cooler, and the cold storage is internally provided with a low-temperature low-pressure refrigerant for evaporation refrigeration, so that the temperature in the cold storage is maintained within a preset temperature range.
In order to more clearly understand the air curtain system of the refrigeration house provided by the invention, the following description is provided for the specific working process of the air curtain system:
in a normal state, the cold storage door 15 is closed, the cold storage air curtain system does not work, when the cold storage door 15 is opened, the cold storage door sensing unit 14 can output an opening control signal, so that the in-storage fan 1 and the out-storage fan 2 are started, pressurized air is formed in the in-storage static pressure box 3 and the out-storage static pressure box 4, an air curtain inner curtain wall 9 and an air curtain outer curtain wall 10 are formed through the in-storage air supply duct 11 and the out-storage air supply duct 12, and then the air enters the in-storage air return duct 5 and the out-storage air return duct 6 on the ground and returns to the in-storage or the out-storage respectively; for the invention, in order to further reduce the heat and moisture exchange of the air inside and outside the refrigeration house, the pressurized air inside the refrigeration house is input into the air curtain space through the positive pressure air supply outlet 13 inside the refrigeration house, thereby effectively isolating the air inside and outside the refrigeration house;
when the cold storage door 15 is closed, the cold storage door sensing unit 14 outputs a closing control signal, the in-storage fan 1 and the out-storage fan 2 are closed, and the air curtain system stops working.
It should be noted that the present invention is applicable not only to a newly constructed freezer but also to the modification of the freezer.
Based on the scheme, the air curtain system of the refrigeration house provided by the invention can be arranged inside and outside the air curtain door, the air curtain inner curtain wall 9 and the air curtain outer curtain wall 10 form a closed air curtain space together, and meanwhile, low-temperature cold air in the refrigeration house can be further input into the space through a plurality of air supply devices 13 with positive pressure in the refrigeration house which are specially arranged at the center of the bottom of the internal static pressure box 3, so that the pressure in the closed space is slightly higher than the ambient atmospheric pressure, and the closed air curtain space with positive pressure is formed, thereby efficiently preventing the air outside the refrigeration house from diffusing into the refrigeration house, reducing the heat and humidity exchange of the air inside and outside the refrigeration house when the air curtain door is opened, maintaining the temperature in the refrigeration house stable, slowing down the frost formation rate of an air cooler, and finally improving the.
Compared with the prior art, the air curtain system for the refrigeration house, which is provided by the invention, has the advantages that the heat insulation effect is good, the air curtain can be used for forming the closed positive pressure space inside and outside the refrigeration house, the air outside the refrigeration house is effectively prevented from diffusing into the refrigeration house, the temperature inside the refrigeration house is maintained to be stable, the quality of goods stored in the refrigeration house is ensured, the air curtain system is beneficial to wide application, and the air curtain system has great production practice significance.
In addition, the invention can also reduce the heat and humidity exchange of the air inside and outside the refrigerator at the beginning of the refrigerator door, slow down the frosting rate of the air cooler and better maintain the temperature in the refrigerator to be stable.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (3)

1. A freezer air curtain system capable of forming a positive pressure space, characterized by comprising a hollow freezer having a freezer door (15) therein for access to goods;
the inner side and the outer side of the top of the cold storage door (15) are respectively provided with an outer cold pressure box (4) and an inner cold pressure box (3);
the top of the warehouse outer static pressure box (4) is communicated with the air outlets at the bottoms of the warehouse outer fans (2);
the top of the in-warehouse static pressure box (3) is communicated with the air outlets at the bottoms of the in-warehouse fans (1);
a plurality of warehouse external air delivery ducts (12) with downward openings are arranged at the bottom opening of the warehouse external static pressure box (4);
a plurality of in-warehouse air supply ducts (11) with downward openings are arranged at the bottom opening of the in-warehouse static pressure box (3);
a plurality of external air return ports (8) with upward openings are arranged on the ground (20) on the outer side of the bottom of the cold storage door (15);
a plurality of in-warehouse air return ports (7) with upward openings are arranged on the ground (20) on the inner side of the bottom of the cold storage door (15);
the warehouse external air return opening (8) is arranged opposite to the warehouse external air delivery duct (12) correspondingly, and the shape and the size of the warehouse external air return opening (8) are correspondingly matched with those of the warehouse external air delivery duct (12);
the air return opening (7) in the warehouse is opposite to the air supply duct (11) in the warehouse, and the shape and the size of the air return opening (7) in the warehouse are correspondingly matched with those of the air supply duct (11) in the warehouse;
two hollow external air return ducts (6) which are transversely distributed are arranged on the ground (20) on the outer side of the bottom of the cold storage door (15), and the two external air return ducts (6) are arranged in bilateral symmetry;
one ends, close to the two external air return ducts (6), of the two external air return ducts are opened and communicated with the external air return opening (8), and the other ends, far away from the two external air return ducts (6), of the two external air return ducts are opened upwards and far away from the position of the cold storage door (15);
two hollow in-warehouse return air ducts (5) which are transversely distributed are arranged on the ground (20) on the inner side of the bottom of the cold storage door (15), and the two in-warehouse return air ducts (5) are arranged in bilateral symmetry;
one ends of the two in-warehouse return air ducts (5) close to each other are opened and communicated with the in-warehouse return air inlet (7), and the other ends of the two in-warehouse return air ducts (5) far away from each other are opened upwards and far away from the position of the cold storage door (15);
the center of the bottom of the in-warehouse static pressure box (3) is also provided with a plurality of in-warehouse positive pressure air supply outlets (13) which are transversely distributed;
the transverse widths of the external static pressure box (4) and the internal static pressure box (3) are respectively equal to the transverse width of the cold storage door (15), and the external static pressure box (4) and the internal static pressure box (3) are arranged symmetrically;
the cold storage door sensing unit (14) is installed on one side of the cold storage door (15) and used for detecting and identifying the working state of the cold storage door (15), namely, whether the cold storage door is opened or closed is identified, when the cold storage door is detected to be in the opening state, an opening control signal is sent to the internal fan (1) and the external fan (2) of the cold storage, the internal fan (1) and the external fan (2) of the cold storage are triggered to be started, when the cold storage door is detected to be in the closing state, a closing control signal is sent to the internal fan (1) and the external fan (2) of the cold storage, and the internal fan (1) and the external fan (2) of the cold storage are stopped.
2. The air curtain system of the refrigeration house according to claim 1, characterized in that the left and right sides of the bottom of the inner static pressure box (3) and the inner side edge are provided with inner air delivery ducts (11);
and the left side, the right side and the outer side edge of the bottom of the external bin static pressure box (4) are provided with external bin air delivery ducts (12).
3. The freezer air curtain system of claim 1, characterized in that the freezer door sensing unit (14) is a limit switch, a proximity switch or an infrared sensor.
CN201810912918.1A 2018-08-13 2018-08-13 Refrigeration house air curtain system capable of forming positive pressure space Active CN108759253B (en)

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