Multi-section multi-angle air curtain device for cold storage

Abstract

The application discloses a multi-section multi-angle air curtain device for cold storage, and relates to the technical field of air curtain for cold storage.The device comprises a cold storage door and an air curtain machine, wherein the air curtain machine is connected to the cold storage door, and the air curtain machine comprises an upper air curtain machine, a middle air curtain machine and a lower air curtain machine.The upper air curtain machine and the middle air curtain machine are arranged on the outdoor side of the door frame of the cold storage door, and the lower air curtain machine is arranged on the indoor side of the door frame of the cold storage door.The air curtain generated by the opening of the air curtain machine is a non-planar air curtain, and different arc-shaped air curtain walls and planar air curtain walls with different angles can be formed according to different sections of the air curtain machine, which has a good antagonistic effect on air exchange in different directions.The application solves the problem that the air curtain used in the cold storage door cannot guarantee the integrity of the air curtain, and the air curtain cannot relieve the air exchange problem caused by the phenomenon that cold air seeps out below the cold storage door and hot air invades above the cold storage door under the influence of air thermal pressure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air curtain for cold storage, in particular to a multi-section multi-angle air curtain device for cold storage. BACKGROUND

[0002] Under the background of rapid development of cold chain industry, the high energy consumption problem hidden behind it has gradually become an important challenge that the industry must face. According to the statistics of China Refrigeration Society, the carbon emissions generated by the energy consumption of cold chain logistics industry accounts for 2.5% of the world's carbon emissions. And the energy consumption of cold storage, as a building for cooling and storing goods in cold chain logistics, generally accounts for more than 70% of the energy consumption of the whole cold chain logistics enterprise.

[0003] When personnel and goods are loaded and unloaded, the cold storage door needs to be kept open. When the cold storage door is opened, the flow of air inside and outside causes the leakage of cold air and the invasion of hot air, which generates a large amount of load. When the cold storage door is frequently opened, the internal cold air is lost and replaced by outdoor air with higher temperature under the action of internal and external thermal pressure difference, which further causes the temperature inside the cold storage to rise. This temperature fluctuation not only affects the quality of stored products, but also increases the load of the refrigeration system because more energy is needed to restore the stable temperature inside the cold storage. The air convection caused by opening the door in normal buildings is generally not large, and the generated load accounts for a small proportion in the building; but for cold storage, the indoor and outdoor temperature difference is huge, and the air convection caused by thermal pressure is very strong, and the generated load can account for more than 50% of the total load.

[0004] Applying measures to reduce the air exchange generated when the cold storage door is opened can significantly reduce this part of the load. The commonly used measures at present are: using quick lifting door, using object windbreak such as rubber sheet, air bag and using air curtain. Air curtain is divided into top sending and side sending type, and top sending type is more commonly used, but it is not convenient to set return air on the ground, which cannot guarantee the integrity of the air curtain; side sending type can set air supply and return air, which can guarantee the integrity of the air curtain. But affected by air thermal pressure, the main performance below the cold storage door is cold air seepage, and the main performance above the cold storage door is hot air invasion, and the side sending type with fixed air supply direction cannot alleviate the air exchange caused by this phenomenon. SUMMARY

[0005] The purpose of the present application is to provide a multi-section multi-angle air curtain device for cold storage, which solves the problem that the air curtain used in the current cold storage door cannot guarantee the integrity of the air curtain, and the air curtain cannot alleviate the air exchange caused by the phenomenon that the main performance below the cold storage door is cold air seepage, and the main performance above the cold storage door is hot air invasion under the influence of air thermal pressure.

[0006] In order to achieve the above object, the application provides a multi-section multi-angle air curtain device for cold storage, which comprises a cold storage door and an air curtain machine, the air curtain machine is connected to the cold storage door, the air curtain machine comprises an upper section air curtain machine, a middle section air curtain machine and a lower section air curtain machine, the upper section air curtain machine and the middle section air curtain machine are arranged on the outdoor side of the door frame of the cold storage door, and the lower section air curtain machine is arranged on the indoor side of the door frame of the cold storage door, and the air curtain generated by the opening of the air curtain machine is a non-planar air curtain.

[0007] Preferably, the upper section air curtain machine accounts for 2 / 5 of the height of the door frame of the cold storage door, the middle section air curtain machine accounts for 1 / 5 of the height of the door frame of the cold storage door, and the lower section air curtain machine accounts for 2 / 5 of the height of the door frame of the cold storage door.

[0008] Preferably, the upper section air curtain machine comprises an upper section air supply machine and an upper section air return machine which are symmetrically arranged on the two sides of the door frame of the cold storage door, the upper section air supply machine and the upper section air return machine are installed on the upper part of the outdoor side of the door frame of the cold storage door, and the air supply direction of the upper section air supply machine and the air return direction of the upper section air return machine are both deviated by 5° to the outdoor side with the cold storage door plane as the reference.

[0009] Preferably, the middle section air curtain machine comprises a middle section air supply machine and a middle section air return machine which are symmetrically arranged on the two sides of the door frame of the cold storage door, the middle section air supply machine and the middle section air return machine are installed on the middle part of the outdoor side of the door frame of the cold storage door, and the air supply direction of the middle section air supply machine and the air return direction of the middle section air return machine are parallel to the cold storage door.

[0010] Preferably, the lower section air curtain machine comprises a lower section air supply machine and a lower section air return machine which are symmetrically arranged on the two sides of the door frame of the cold storage door, the lower section air supply machine and the lower section air return machine are installed on the lower part of the indoor side of the door frame of the cold storage door, and the air supply direction of the lower section air supply machine and the air return direction of the lower section air return machine are both deviated by 5° to the indoor side with the cold storage door plane as the reference.

[0011] Preferably, the air speed of the upper section air curtain machine, the middle section air curtain machine and the lower section air curtain machine is 8 m / s.

[0012] Preferably, the upper section air curtain machine, the middle section air curtain machine and the lower section air curtain machine are opened when the cold storage door is opened and are closed when the cold storage door is closed.

[0013] Preferably, the air supply outlet of the upper section air supply machine, the middle section air supply machine and the lower section air supply machine is provided with a guide vane.

[0014] Therefore, the application adopts the above-mentioned structure of a multi-section multi-angle air curtain device for cold storage, which divides the side supply type air curtain into three sections of upper, middle and lower sections, respectively sets different angles, forms a non-planar air curtain, and can further improve the air curtain to isolate cold and hot air and reduce air exchange.

[0015] The technical solutions of the application are further described in detail below with reference to the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view of a multi-section multi-angle air curtain device for a cold storage according to the present application.

[0017] Figure 2 It is a side view of a multi-section multi-angle air curtain device for a cold storage according to the present application.

[0018] Reference signs

[0019] 1, cold storage door; 2, upper section air blower; 3, middle section air blower; 4, lower section air blower; 5, upper section air return fan; 6, middle section air return fan; 7, lower section air return fan. DETAILED DESCRIPTION

[0020] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0021] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] As shown in Figure 1 , Figure 2 The multi-section multi-angle air curtain device for a cold storage according to the present application includes a cold storage door 1 and an air curtain machine, the air curtain machine is connected to the cold storage door 1, the air curtain machine includes an upper section air curtain machine, a middle section air curtain machine and a lower section air curtain machine, the upper section air curtain machine and the middle section air curtain machine are arranged on the outdoor side of the door frame of the cold storage door 1, and the lower section is arranged on the indoor side of the door frame of the cold storage door 1. The air curtain generated by the opening of the air curtain machine is a non-planar air curtain. The cold storage door 1 adopts a left-right translation type opening and closing door or an up-down lifting type opening and closing door, and the opening of the cold storage door 1 does not affect the air curtain formed by the air curtain machine, for example, a plastic roller shutter door and the like.

[0023] For the air exchange caused by the opening of the cold storage door 1, due to the thermal pressure effect and the difference in air density, the density of the cold air is greater, and the density of the hot air is smaller, so when the air exchange occurs, the cold air will flow out from the lower end of the cold storage door 1, and the hot air will flow into from the upper end of the cold storage door 1, and the closer to the two ends, the greater the air flow intensity.

[0024] And cold storage as a special building, because the indoor and outdoor temperature difference is huge, so the air exchange is more intense than ordinary buildings. The fixed direction of the air curtain is affected by the above, and the air curtain wall is not good, especially the side sending type.

[0025] And the three-section air curtain machine in the application actively resists the air exchange caused by thermal pressure and density difference by using different direction of air supply, which can solve this problem. The upper section air curtain machine occupies 2 / 5 of the length of the cold storage door 1, and the upper section air curtain machine includes an upper section air supply machine 2 and an upper section air return machine 5, which are installed on the upper part of the outdoor side of the cold storage door 1. The air supply direction of the upper section air supply machine 2 and the air return direction of the upper section air return machine 5 are both deviated from the plane of the cold storage door 1 by 5° to the outdoor side, and the wind speed is 8m / s. By sending and returning air at an angle, a complete and slightly curved air curtain is formed, which forms a favorable resistance to the air entering the cold side from the hot side and reduces the amount of hot air invading the cold storage.

[0026] The middle section air curtain machine occupies 1 / 5 of the length of the cold storage door 1, and the middle section air curtain machine includes a middle section air supply machine 3 and a middle section air return machine 6, which are installed on the middle part of the outdoor side of the cold storage door 1. The air supply direction of the middle section air supply machine 3 and the air return direction of the middle section air return machine 6 are parallel to the cold storage door 1, and the wind speed is 8m / s. By sending and returning air directly, a complete air curtain is formed, which forms a block to the small amount of cold and hot air exchange at the middle position.

[0027] The lower section air curtain machine occupies 2 / 5 of the length of the cold storage door 1, and the lower section air curtain machine includes a lower section air supply machine 4 and a lower section air return machine 7, which are installed on the lower part of the indoor side of the cold storage door 1. The air supply direction of the lower section air supply machine 4 and the air return direction of the lower section air return machine 7 are both deviated from the plane of the cold storage door 1 by 5° to the indoor side, and the wind speed is 8m / s. By sending and returning air at an angle, a complete and slightly curved air curtain is formed, which forms a favorable resistance to the air flowing from the cold side to the hot side and reduces the amount of cold air lost to the outdoor.

[0028] The cold storage multi-section multi-angle air curtain device is generally linked with the cold storage door 1 to achieve better energy saving effect, and is started when the cold storage door 1 is opened and stopped when it is closed. The air supply machine absorbs air flow from the surrounding environment and then blows it out at a certain speed in a certain direction, and the air flow direction can be slightly changed by the guide vane; the air return machine absorbs air flow from the air supply direction, which can improve the integrity of the second half of the air curtain, and then discharges it to the surrounding environment.

[0029] When the cold storage door 1 is opened, the air curtain machine is started, the air supply fan and the air return fan can form an air curtain wall with good integrity, different sections of the fan can form air curtain walls with different angles and plane air curtain walls, and the air curtain walls have good resistance to air exchange in different directions. The air supply outlet of the air supply fan is provided with guide vanes, so that the air flow direction can be slightly changed to better adapt to the environment. After the cold storage door 1 is closed, the air curtain machine is closed.

[0030] Therefore, the multi-section multi-angle air curtain device for cold storage solves the problem that the air curtain used by the cold storage door 1 cannot guarantee the integrity of the air curtain, and the air curtain cannot alleviate the problem of air exchange caused by the phenomenon that cold air seeps out below the cold storage door 1 and hot air invades above the cold storage door 1 under the influence of air thermal pressure.

[0031] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application and not to limit it, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: it can still modify or equivalently replace the technical solutions of the present application, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A multi-segment, multi-angle air curtain device for cold storage, characterized in that: The cold storage door and the air curtain machine are connected, the air curtain machine includes an upper air curtain machine, a middle air curtain machine and a lower air curtain machine, the upper air curtain machine and the middle air curtain machine are arranged on the outdoor side of the door frame of the cold storage door, the lower air curtain machine is arranged on the indoor side of the door frame of the cold storage door, and the air curtain machine generates a non-planar air curtain when being turned on. The upper air curtain machine accounts for 2 / 5 of the height of the door frame of the cold storage door, the middle air curtain machine accounts for 1 / 5 of the height of the door frame of the cold storage door, and the lower air curtain machine accounts for 2 / 5 of the height of the door frame of the cold storage door. The upper air curtain machine includes upper air supply machines and upper air return machines which are symmetrically arranged on both sides of the door frame of the cold storage door, the upper air supply machines and the upper air return machines are installed on the upper part of the outdoor side of the door frame of the cold storage door, the air supply direction of the upper air supply machines and the air return direction of the upper air return machines are both deviated from the plane of the cold storage door by 5° to the outdoor side; The middle air curtain machine includes middle air supply machines and middle air return machines which are symmetrically arranged on both sides of the door frame of the cold storage door, the middle air supply machines and the middle air return machines are installed on the middle part of the outdoor side of the door frame of the cold storage door, the air supply direction of the middle air supply machines and the air return direction of the middle air return machines are parallel to the cold storage door; The lower air curtain machine includes lower air supply machines and lower air return machines which are symmetrically arranged on both sides of the door frame of the cold storage door, the lower air supply machines and the lower air return machines are installed on the lower part of the indoor side of the door frame of the cold storage door, the air supply direction of the lower air supply machines and the air return direction of the lower air return machines are both deviated from the plane of the cold storage door by 5° to the indoor side.

2. The multi-section multi-angle air curtain device for cold storage according to claim 1, characterized in that: The air speed of the upper air curtain machine, the middle air curtain machine and the lower air curtain machine is 8 m / s.

3. The multi-section multi-angle air curtain device for cold storage according to claim 2, characterized in that: The upper air curtain machine, the middle air curtain machine and the lower air curtain machine are turned on when the cold storage door is opened and turned off when the cold storage door is closed.

4. The multi-section multi-angle air curtain device for cold storage according to claim 3, characterized in that: The air supply outlets of the upper air supply machines, the middle air supply machines and the lower air supply machines are provided with guide vanes.

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