Air curtain door

Abstract

The utility model provides an air curtain door. The air curtain door comprises a door-shaped air pipe, a drainage fan and an air curtain machine. The door-shaped air pipe comprises a first vertical pipe, a second vertical pipe and a top pipe. The two ends of the top pipe communicate with the top end of the first vertical pipe and the top end of the second vertical pipe correspondingly. The air curtain machine is arranged in the first vertical pipe, an air outlet is formed in the side wall of the first vertical pipe, and the air curtain machine is connected with the air outlet; an air return opening is formed in the side wall of the second vertical pipe, and the air outlet faces the air return opening; a drainage fan is arranged in the top pipe, and acceleration air pipes are arranged on an air inlet and an air outlet of the drainage fan; the acceleration air pipe is provided with a contraction section, a middle section and an expansion section, the contraction section and the expansion section are located at the two ends of the middle section respectively, and the contraction section is connected with the drainage fan.

Description

Technical Field

[0001] The present application relates to the technical field of cold storage doors, and in particular to an air curtain door. Background Art

[0002] Each time the cold storage door is opened, the exchange of hot and cold air flows inside and outside the cold storage will cause the loss of cold air and make the goods stored near the door easy to deteriorate. In order to effectively reduce the heat transfer when the cold storage is opened, reduce the heat and mass exchange between the external ambient air and the internal environment, and maintain the indoor temperature control requirements, an air curtain is often set at the entrance of the cold storage.

[0003] The air curtain is formed by the air supply of the air curtain machine, and its air supply forms include vertical air supply and horizontal air supply. When the door is opened during cargo transportation, the air curtain machine will continue to operate to block the heat transfer inside and outside the cold storage. However, this type of air curtain machine has a low air supply speed, and the far end of the air curtain is easy to diverge, making it difficult to form a complete air curtain, resulting in a loss of cooling capacity in the cold storage. Utility Model Content

[0004] The embodiment of the present application provides an air curtain door, including a door-type air duct, a drainage fan and an air curtain machine;

[0005] The door-type air duct includes a first vertical pipe, a second vertical pipe and a top pipe, and the two ends of the top pipe are respectively connected to the top ends of the first vertical pipe and the second vertical pipe;

[0006] The air curtain machine is arranged in the first vertical pipe, an air outlet is arranged on the side wall of the first vertical pipe, and the air curtain machine is connected to the air outlet; a return air outlet is arranged on the side wall of the second vertical pipe, and the air outlet faces the return air outlet; a drainage fan is arranged in the top pipe, and an accelerating air duct is arranged on the air inlet and the air outlet of the drainage fan;

[0007] The accelerating air duct comprises a contraction section, a middle section and an expansion section, wherein the contraction section and the expansion section are respectively located at two ends of the middle section, and the contraction section is connected to the induced draft fan.

[0008] In one possible implementation manner, in the air curtain door provided in the embodiment of the present application, the return air outlet on the second vertical pipe includes a plurality of return air circular holes arranged on the side wall of the second vertical pipe, and the plurality of return air circular holes are dispersed on the side wall of the second vertical pipe.

[0009] In one possible implementation manner, in the air curtain door provided in the embodiment of the present application, a plurality of return air ducts are provided in the second vertical pipe, one end of the return air duct is connected to the return air circular hole, and the other end of the return air duct is vertically upward.

[0010] In one possible implementation manner, in the air curtain door provided in the embodiment of the present application, the other end of each of the return air ducts is respectively connected to a Laval nozzle.

[0011] In one possible implementation manner, in the air curtain door provided in the embodiment of the present application, an air duct partition is provided in the second vertical pipe, the air duct partition is horizontally arranged, a plurality of fixing holes are provided on the air duct partition, and the Laval nozzle is connected to the fixing holes.

[0012] In one possible implementation manner, in the air curtain door provided in the embodiment of the present application, the return air duct is bent in an L-shape, the horizontal section of the L-shaped return air duct is connected to the return air circular hole, and the vertical section of the L-shaped return air duct is connected to a Laval nozzle.

[0013] In one possible implementation manner, in the air curtain door provided in the embodiment of the present application, the radial dimension of the contraction section gradually decreases outward, and the radial dimension of the expansion section gradually increases outward.

[0014] Beneficial effect: The air curtain door provided by the present application can re-inhale the airflow sent out by the air curtain machine from the return air port, thereby avoiding the divergence of the air curtain at the far end and ensuring the formation of a complete air curtain. In addition, the airflow can be accelerated by the accelerating air duct and the Laval nozzle, thereby improving the heat insulation effect of the air curtain and reducing the loss of cold capacity in the cold storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 This is a schematic diagram of the structure of the air curtain door provided in the embodiment of the present application. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the air curtain door provided in the embodiment of the present application. Figure 2 ;

[0018] Figure 3 is a front view schematic diagram of an air curtain door provided in an embodiment of the present application;

[0019] Figure 4 It is a structural schematic diagram of a drainage fan in an air curtain door provided in an embodiment of the present application;

[0020] Figure 5 It is a schematic diagram of the structure of the return air duct in the air curtain door provided in an embodiment of the present application;

[0021] Figure 6 It is a schematic diagram of the structure of the Laval nozzle in the air curtain door provided in the embodiment of the present application.

[0022] Description of Reference Numerals

[0023] 10- first vertical pipe;

[0024] 11- Air outlet;

[0025] 20 - second vertical pipe;

[0026] 21-return air outlet;

[0027] 30-top pipe;

[0028] 40-air curtain machine;

[0029] 50- drainage fan;

[0030] 60-acceleration air duct;

[0031] 61-contraction segment;

[0032] 62-middle segment;

[0033] 63- expansion segment;

[0034] 70-return air duct;

[0035] 80-Laval nozzle;

[0036] 90-Airway partition. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0038] Figure 1 This is a schematic diagram of the structure of the air curtain door provided in the embodiment of the present application. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the air curtain door provided in the embodiment of the present application. Figure 2 ; Figure 3 is a front view schematic diagram of an air curtain door provided in an embodiment of the present application; Figure 4It is a structural schematic diagram of a drainage fan in an air curtain door provided in an embodiment of the present application; Figure 5 It is a schematic diagram of the structure of the return air duct in the air curtain door provided in an embodiment of the present application; Figure 6 It is a schematic diagram of the structure of the Laval nozzle in the air curtain door provided in the embodiment of the present application.

[0039] See also Figure 1-Figure 5 As shown, an embodiment of the present application provides an air curtain door, including a door-type air duct, a drainage fan 50 and an air curtain machine 40, wherein:

[0040] The door-type air duct includes a first vertical pipe 10, a second vertical pipe 20 and a top pipe 30, and the two ends of the top pipe 30 are respectively connected to the top of the first vertical pipe 10 and the second vertical pipe 20, thereby forming a door-type structure. An air curtain machine 40 is arranged in the first vertical pipe 10, and an air outlet 11 is arranged on the side wall of the first vertical pipe 10. The exhaust port of the air curtain machine 40 is connected to the air outlet 11, so that a horizontal air curtain can be manufactured through the air outlet 11. A return air port 21 is arranged on the side wall of the second vertical pipe 20, and the air outlet 11 faces the return air port 21, so that the gas discharged from the air curtain machine 40 can be sucked in. A draught fan 50 is provided in the top pipe 30. An accelerating air duct 60 is provided on the air inlet and the air outlet of the draught fan 50. The accelerating air duct 60 comprises a contraction section 61, a middle section 62 and an expansion section 63. The contraction section 61 and the expansion section 63 are respectively located at the two ends of the middle section 62. The radial dimension of the contraction section 61 gradually decreases outwardly, and the radial dimension of the expansion section 63 gradually increases outwardly. The contraction section 61 is connected to the draught fan 50. The channel that first contracts and then expands can be formed by the two accelerating air ducts 60, which can accelerate the flow of airflow and improve the air supply speed.

[0041] The gas discharged from the air curtain machine 40 flows through the air outlet 11 to the return air outlet 21 on the side wall of the second vertical pipe 20. Due to the action of the induction fan 50, the gas is sucked in again from the return air outlet 21 and accelerated by the accelerating air duct 60 before flowing to the air curtain machine 40, thus forming a cycle. Due to the accelerated movement of the gas and the action of the return air outlet 21, the air curtain jet can form a more complete air curtain, thereby reducing the cooling loss in the cold storage.

[0042] See also Figure 2 As shown, in the embodiment of the present application, the return air outlet 21 on the second vertical pipe 20 includes a plurality of return air circular holes arranged on the side wall of the second vertical pipe 20, and the plurality of return air circular holes are dispersedly distributed on the side wall of the second vertical pipe 20. Since the airflow of the wind curtain does not flow directly to the return air outlet 21 during the movement, but will produce a curvature and dispersion, the return air outlet 21 is designed as a plurality of return air circular holes and dispersedly distributed on the side wall of the second vertical pipe 20, so that the airflow of the air outlet 11 can be better recovered, thereby forming a good airflow gate.

[0043] See also Figure 5As shown, a plurality of return air ducts 70 are disposed in the second vertical pipe 20, and the return air duct 70 is bent in an L shape, and the horizontal section of the L-shaped return air duct 70 is connected to the return air circular hole, and the vertical section of the L-shaped return air duct 70 is connected to a Laval nozzle 80. An airway baffle 90 is disposed in the second vertical pipe 20, and the airway baffle 90 is located on the upper side of the return air duct 70, and the airway baffle 90 is disposed horizontally, and a plurality of fixing holes are disposed on the airway baffle 90, and the Laval nozzle 80 is connected to the fixing holes.

[0044] See also Figure 6 As shown, the Laval nozzle 80 is a pipe that first contracts and then expands to generate supersonic airflow. In the contraction section of the nozzle, as the cross-sectional area of ​​the pipe gradually decreases, the airflow speed continues to increase, and more air can be sucked in. In addition, the airflow in the Laval nozzle 80 can be accelerated twice by the induced draft fan 50, thereby providing more air for the air curtain machine. Due to the presence of the air duct baffle 90, the airflow backflow can be effectively prevented, so that the airflow accelerated by the Laval nozzle 80 moves toward the acceleration air duct 60.

[0045] In the description of the embodiments of the present application, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0046] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein. For example, it is possible to implement in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An air curtain door, characterized in that: Including door-type air ducts, drainage fans and air curtains; The door-type air duct includes a first vertical pipe, a second vertical pipe and a top pipe, and the two ends of the top pipe are respectively connected to the top ends of the first vertical pipe and the second vertical pipe; The air curtain machine is arranged in the first vertical pipe, an air outlet is arranged on the side wall of the first vertical pipe, and the air curtain machine is connected to the air outlet; a return air outlet is arranged on the side wall of the second vertical pipe, and the air outlet faces the return air outlet; a drainage fan is arranged in the top pipe, and an accelerating air duct is arranged on the air inlet and the air outlet of the drainage fan; The accelerating air duct comprises a contraction section, a middle section and an expansion section, wherein the contraction section and the expansion section are respectively located at two ends of the middle section, and the contraction section is connected to the induced draft fan.

2. The air curtain door according to claim 1, characterized in that: The return air outlet on the second vertical pipe includes a plurality of return air circular holes arranged on the side wall of the second vertical pipe, and the plurality of return air circular holes are dispersed on the side wall of the second vertical pipe.

3. The air curtain door according to claim 2, characterized in that: A plurality of return air ducts are arranged in the second vertical pipe, one end of the return air duct is communicated with the return air circular hole, and the other end of the return air duct is vertically upward.

4. The air curtain door according to claim 3, characterized in that: The other end of each of the return air ducts is respectively connected with a Laval nozzle.

5. The air curtain door according to claim 4, characterized in that: An airway baffle is provided in the second vertical pipe, the airway baffle is arranged horizontally, a plurality of fixing holes are provided on the airway baffle, and the Laval nozzle is communicated with the fixing holes.

6. The air curtain door according to claim 5, characterized in that: The return air duct is bent in an L-shape, the horizontal section of the return air duct being bent in an L-shape is connected to the return air circular hole, and the vertical section of the return air duct being bent in an L-shape is connected to a Laval nozzle.

7. The air curtain door according to any one of claims 1 to 6, characterized in that: The radial dimension of the contraction section gradually decreases outwards, and the radial dimension of the expansion section gradually increases outwards.

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